Spot welding mechanism for assembly line of explosion-proof combined cap of cylindrical lithium battery

Abstract

The utility model discloses a cylindrical lithium battery explosion-proof combined cap assembly line spot welding mechanism which comprises an upper adjusting piece and a lower adjusting piece which correspond to the upper end face and the lower end face of a rotating disc, the upper adjusting piece comprises a first driving piece located beside the rotating disc and a moving piece connected to an output shaft of the first driving piece, and the moving piece is connected to the rotating disc. The movable piece is provided with a detachable extrusion piece located above the rotary disc, and the extrusion end of the extrusion piece corresponds to the containing opening in the rotary disc; the extrusion end of the extrusion piece is inserted into the containing opening along with driving of the first driving piece. The movable part on the upper adjusting part moves along with the first driving part, after the extrusion end of the extrusion part is inserted into the containing opening in the rotary disc, the position of the extrusion end in the containing opening is controlled through lap joint of the extrusion part and the rotary disc, so that the consistency of the welding effect is guaranteed, in addition, the position of a workpiece in the containing opening can be adjusted through the lower adjusting part, and the welding efficiency is improved. Therefore, the extrusion end is matched to weld the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of cap assembly technology, and in particular to a spot welding mechanism for a cylindrical lithium battery explosion-proof combined cap assembly line. Background Technology

[0002] Lithium batteries can be broadly classified into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. The fifth generation of rechargeable batteries, lithium metal batteries, was developed in 1996. Their safety, specific capacity, self-discharge rate, and performance-price ratio are all superior to lithium-ion batteries. Lithium batteries are generally cylindrical in shape, and a cap is needed to seal and conduct electricity within the cylindrical battery.

[0003] The assembly machines in the existing cylindrical lithium battery explosion-proof combination cap (hereinafter referred to as cap) industry all use the direct pressing welding method. During equipment operation, the total height difference of the cap metal parts is constantly generated. When the level of the turntable cannot be guaranteed, the focal length of the cap welding is uneven, which in turn affects the welding effect of the weld. Utility Model Content

[0004] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a spot welding mechanism for the assembly line of explosion-proof combined caps for cylindrical lithium batteries. This mechanism solves the problem that the assembly machines in the industry all use a direct pressing welding method, which causes a continuous difference in the total height of the cap metal parts during equipment operation. When the level of the turntable cannot be guaranteed, this leads to uneven welding focal lengths of the caps, thus affecting the welding effect of the weld points.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a spot welding mechanism for a cylindrical lithium battery explosion-proof combined cap assembly line, comprising an upper adjusting member and a lower adjusting member corresponding to the upper and lower end faces of a turntable, the upper adjusting member and the lower adjusting member being opposite to each other, the upper adjusting member comprising a first driving member located next to the turntable and a moving member connected to the output shaft of the first driving member, the moving member being provided with a detachable pressing member located above the turntable, and the pressing end of the pressing member corresponding to the receiving opening on the turntable; driven by the first driving member, the pressing end of the pressing member is inserted into the receiving opening.

[0006] Furthermore, a mounting plate is provided next to the turntable, the upper adjustment component is mounted on the mounting plate, and the moving component has an L-shaped end that overlaps with the top of the mounting plate.

[0007] Furthermore, the extruder has an opening corresponding to the receiving port, and a detachable presser foot is provided inside the opening, with the extrusion end located at one end of the presser foot corresponding to the receiving port.

[0008] Furthermore, the inner wall of the opening is threaded, and the presser foot engages with the thread.

[0009] Furthermore, the presser foot includes a first part with a screw-in opening, a second part connected to one end of the opening corresponding to the first part, and a through-hole connecting the first part and the second part.

[0010] Furthermore, the straight-line distance between adjacent inner and outer edges of the first part is the first spacing A, and the diameter of the opening is the second spacing A; when the length of the first spacing A increases, the second spacing A decreases.

[0011] Furthermore, the second part is provided with a cut-off opening, and a baffle is movably connected to the inner cavity of the cut-off opening.

[0012] Furthermore, the cut-off cavity is provided with a connecting rod, and a stop strip is sleeved on the connecting rod, with the stop strip and the connecting rod fitting tightly together.

[0013] Furthermore, the lower adjustment component includes a second driving component, a push plate connected to the output shaft of the second driving component, and a limiting component located at the lower end of the turntable; when the push plate moves toward the turntable, it can engage with the limiting component.

[0014] Furthermore, a push rod with a corresponding receiving port is connected to the middle of the push plate; as the push plate moves closer to the turntable, the push rod is inserted into the receiving port and abuts against the workpiece inside the receiving port.

[0015] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, by moving the upper adjusting member along with the first driving member, the extrusion end of the extrusion member is inserted into the receiving port of the turntable. The position of the extrusion end in the receiving port is controlled by the overlap between the extrusion member and the turntable, so as to ensure the consistency of the welding effect. In addition, the lower adjusting member can adjust the position of the workpiece in the receiving port, thereby cooperating with the extrusion end to perform welding processing on the workpiece.

[0016] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a plan view of Embodiment 1 of this utility model.

[0018] Figure 2 This is a first-view perspective perspective view of Embodiment 1 of this utility model.

[0019] Figure 3 This is a second-view perspective perspective view of Embodiment 1 of this utility model.

[0020] Figure 4 This is a top view of the upper adjustment member of Embodiment 1 of this utility model.

[0021] Figure 5 This is a three-dimensional view of the presser foot of Embodiment 1 of this utility model.

[0022] Figure 6 This is a side view of the presser foot of Embodiment 1 of this utility model.

[0023] Explanation of reference numerals in the attached diagram:

[0024] 10 turntables, 11 receiving ports;

[0025] 20 Adjusting component, 21 First driving component, 22 Moving component, 23 Extrusion component, 231 Opening, 2311 Thread, 232 Pressing foot, 2321 First part, 2322 Second part, 2323 Through port, 233 Cut-off port, 234 Stop bar, 235 Connecting rod, 24 Extrusion end;

[0026] A1 first spacing, A2 second spacing;

[0027] 30 Lower adjustment component, 31 Second drive component, 32 Push plate, 33 Limiting component, 34 Top rod;

[0028] 40 mounting plate. Detailed Implementation

[0029] Please refer to Figure 1-6 As shown, it illustrates the specific structure of a preferred first embodiment of the present invention, which is a spot welding mechanism for a cylindrical lithium battery explosion-proof combination cap assembly line. It includes an upper adjusting member 20 and a lower adjusting member 30 corresponding to the upper and lower end faces of a turntable 10. The upper adjusting member 20 and the lower adjusting member 30 are corresponding to each other. The upper adjusting member 20 includes a first driving member 21 located next to the turntable 10 and a moving member 22 connected to the output shaft of the first driving member 21. The moving member 22 is provided with a detachable pressing member 23 located above the turntable 10, and the pressing end 24 of the pressing member 23 corresponds to the receiving opening 11 on the turntable 10. Driven by the first driving member 21, the pressing end 24 of the pressing member 23 is inserted into the receiving opening 11. Compared to existing spot welding mechanisms that directly apply downward pressure during cap welding, the cap's height within the turntable is inconsistent due to uneven turntable leveling (turntable leveling changes with stress). This causes variations in the laser's focal length, resulting in inconsistent weld quality and appearance. Furthermore, the downward pressure cannot be controlled. In this new spot welding mechanism, the upper adjusting member 20's moving member 22 moves with the first driving member 21. This allows the pressing end 24 of the pressing member 23 to be inserted into the receiving opening 11 of the turntable 10. The overlapping of the pressing member 23 with the turntable 10 controls the position of the pressing end 24 within the receiving opening 11, ensuring consistent welding results. Additionally, the lower adjusting member 30 adjusts the position of the workpiece within the receiving opening 11, thus facilitating welding with the pressing end 24.

[0030] like Figure 1As shown, for example, a mounting plate 40 is provided next to the turntable 10, an upper adjusting member 20 is mounted on the mounting plate 40, and the moving member 22 has an L-shaped end that overlaps with the top of the mounting plate 40. In order to effectively limit the extrusion member 23 after it moves a certain distance with the first driving member 21, the upper adjusting member 20 is mounted next to the turntable 10, so that after the first driving member 21 drives the moving member 22 to move a certain distance, the extrusion member 23 on the moving member 22 is in contact with the upper surface of the turntable 10, and the extrusion end 24 on the extrusion member 23 is inserted into the receiving port 11. The moving member 22, being L-shaped, limits the position of the extrusion end 24 in the receiving port 11 by overlapping with the upper end of the mounting plate 40, so that the position of the extrusion end 24 is limited, so as to cooperate with the lower adjusting member 30 to process the workpiece in the receiving port 11.

[0031] like Figure 4 As shown, for example, the extruder 23 has an opening 231 corresponding to the receiving port 11, and a detachable presser foot 232 is provided in the opening 231. The extrusion end 24 is located at one end of the presser foot 232 corresponding to the receiving port 11. By opening the opening 231 in the extruder 23 and detachably setting the presser foot 232 in the opening 231, users can replace presser feet 232 of different sizes according to actual use to adapt to different processing requirements of different products.

[0032] Specifically, the inner wall of the opening 231 is provided with a thread 2311, and the presser foot 232 is screwed into the thread 2311. In order to facilitate the separation and combination of the presser foot 232 and the opening 231, the thread 2311 is provided on the inner wall of the opening 231 so that the presser foot 232 can be screwed into the opening 231. After screwing, the presser foot 232 rotates in the horizontal direction while the first driving member 21 drives the presser foot 232 to move in the vertical direction. This ensures that the presser foot 232 does not affect its subsequent use after being screwed into the opening 231, and allows users to replace the presser foot 232 with different sizes according to different usage scenarios.

[0033] It should be noted that the presser foot 232 includes a first part 2321 that engages with the opening 231, a second part 2322 connected to one end of the first part 2321 corresponding to the opening 231, and a through-hole 2323 connecting the first part 2321 and the second part 2322. The first part 2321 is normally engaged with the opening 231. Regardless of whether the through-hole 2323 is enlarged or reduced, the volume of the first part 2321 cannot be changed. If the welding requirements of the workpiece in the receiving port 11 change, the welding requirements of different workpieces can be adapted by changing the volume of the second part 2322 and the size of the through-hole 2323. The change in the volume of the second part 2322 can reduce the production cost of presser feet 232 of different sizes and make it easier for users to distinguish the actual situation of the second part 2322 of different sizes.

[0034] In addition, the straight-line distance between the adjacent inner and outer edges of the first part 2321 is the first spacing A1, and the diameter of the opening 2323 is the second spacing A2; when the length of the first spacing A1 increases, the second spacing A2 decreases.

[0035] like Figure 6 As shown, for example, the second part 2322 is provided with a cut-off opening 233, and a baffle 234 is movably connected to the inner cavity of the cut-off opening 233. Due to the movable connection between the baffle 234 and the cut-off opening 233, the baffle 234 can be bent to further meet the specific welding requirements of the workpiece placed in the receiving opening 11.

[0036] Specifically, the inner cavity of the cut-off opening 233 is provided with a connecting rod 235, and a stop strip 234 is sleeved on the connecting rod 235. The stop strip 234 and the connecting rod 235 are tightly fitted together. The connecting rod 235 is fixed to the two end walls of the cut-off opening 233, and the connecting rod 235 is located at the upper part of the inner cavity of the cut-off opening 233. This ensures that the stop strip 234 sleeved on the connecting rod 235 will not affect the workpiece in the receiving opening 11 when it moves. In addition, due to the tight fit between the stop strip 234 and the connecting rod 235, the stop strip 234 will not naturally slip off after rotating around the connecting rod 235.

[0037] like Figure 2 As shown, exemplarily, the lower adjustment member 30 includes a second driving member 31, a push plate 32 connected to the output shaft of the second driving member 31, and a limiting member 33 located at the lower end of the turntable 10; when the push plate 32 moves toward the turntable 10, it can engage with the limiting member 33. A push rod 34 corresponding to the receiving opening 11 is connected to the middle of the push plate 32; as the push plate 32 approaches the turntable 10, the push rod 34 inserts into the receiving opening 11 and abuts against the workpiece inside the receiving opening 11. The second driving member 31 pushes the push plate 32 toward the turntable 10 until the push plate 32 engages with the limiting member 33, causing the push rod 34 on the push plate 32 to insert into the receiving opening 11 to limit the position of the workpiece inside the receiving opening 11, thus cooperating with the upper adjustment 20 to process the workpiece.

[0038] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A cylindrical lithium battery explosion-proof combined cap assembly line spot welding mechanism, comprising an upper adjusting part (20) and a lower adjusting part (30) corresponding to the upper and lower end faces of a rotating disc (10), the upper adjusting part (20) and the lower adjusting part (30) correspond to each other, characterized in that: The upper adjusting part (20) comprises a first driving part (21) beside the rotary disc (10) and a moving part (22) connected to the output shaft of the first driving part (21), and the moving part (22) is provided with a detachable pressing part (23) above the rotary disc (10), and the pressing end (24) of the pressing part (23) corresponds to the accommodating port (11) of the rotary disc (10). With the driving of the first driving part (21), the pressing end (24) of the pressing part (23) is inserted into the accommodating port (11).

2. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 1, characterized in that: The rotary disc (10) is provided with a mounting plate (40), the upper adjusting part (20) is mounted on the mounting plate (40), and the moving part (22) is L-shaped and one end is overlapped with the top end of the mounting plate (40).

3. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 1, characterized in that: The pressing part (23) is provided with an opening (231) corresponding to the accommodating port (11), and the opening (231) is provided with a detachable pressing foot (232), and the pressing end (24) is located at one end of the pressing foot (232) corresponding to the accommodating port (11).

4. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 3, characterized in that: The inner wall of the opening (231) is provided with a thread (2311), and the pressing foot (232) is screwed with the thread (2311).

5. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 4, characterized in that: The pressing foot (232) comprises a first part (2321) screwed with the opening (231), a second part (2322) connected to one end of the first part (2321) corresponding to the opening (231), and a through hole (2323) penetrating the first part (2321) and the second part (2322).

6. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 5, characterized in that: The straight line distance between the adjacent inner and outer side edges of the first part (2321) is a first distance (A1), and the diameter of the through hole (2323) is a second distance (A2); when the length of the first distance (A1) increases, the second distance (A2) decreases.

7. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 6, characterized in that: The second part (2322) is provided with a cutting port (233), and the cutting port (233) is movably connected with a blocking strip (234) in the inner cavity.

8. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 7, characterized in that: The cutting port (233) is provided with a connecting rod (235), the blocking strip (234) is sleeved on the connecting rod (235), and the blocking strip (234) and the connecting rod (235) are closely attached.

9. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 1, characterized in that: The lower adjusting part (30) comprises a second driving part (31), a pushing plate (32) connected to the output shaft of the second driving part (31), and a limiting part (33) arranged at the lower end of the rotary disc (10); when the pushing plate (32) moves towards the rotary disc (10), it can be overlapped with the limiting part (33).

10. The spot welding mechanism of the cylindrical lithium battery explosion-proof combined cap assembly line according to claim 9, characterized in that: The middle part of the pushing plate (32) is connected with a top rod (34) corresponding to the accommodating port (11); with the pushing plate (32) moving towards the rotary disc (10), the top rod (34) is inserted into the accommodating port (11) and abuts against the workpiece in the accommodating port (11).

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