A copper nozzle pitch-changing device for a connecting piece welding machine

Abstract

This utility model relates to the field of battery production and discloses a copper nozzle pitch-changing device for a connecting piece welding machine, including a pitch-changing assembly, a pressing assembly, and a copper nozzle assembly. The pitch-changing assembly includes a bracket, a pitch-changing drive unit, a linkage telescopic mechanism, and multiple pitch-changing sliders. The pitch-changing drive unit is mounted on the bracket and is used to drive one pitch-changing slider to move along a first direction. One end of the linkage telescopic mechanism is connected to the bracket and is used to drive multiple pitch-changing sliders to move synchronously. The pitch-changing slider is connected to the pressing assembly, and the pressing assembly is movably connected to the copper nozzle assembly. The pressing assembly is used to adjust the position of the copper nozzle assembly. The copper nozzle assembly is used to output protective gas to provide protection for the connecting pieces during welding. This utility model synchronously drives multiple pitch-changing sliders to move through the linkage telescopic mechanism and keeps the spacing between multiple adjacent pitch-changing sliders consistent, realizing automatic adjustment of the copper nozzle assembly spacing, improving the efficiency of copper nozzle assembly spacing adjustment and the efficiency of connecting piece welding production.

Description

Technical Field

[0001] This utility model relates to the field of battery production, and in particular to a copper nozzle pitch-changing device for a connecting piece welding machine. Background Technology

[0002] In the battery production process, the welding of connectors is a very important step. In the traditional process, the copper nozzle mechanism of the connector welding equipment needs to be disassembled to adjust the spacing of the copper nozzles when producing battery modules with different pole spacings. This is very troublesome and seriously affects the production cycle and the welding efficiency of the connectors. Utility Model Content

[0003] The technical problem to be solved by this utility model is: how to automatically adjust the copper nozzle spacing to improve the welding production efficiency of connecting pieces. In order to solve the above technical problem, this utility model provides a copper nozzle pitch changing device for a connecting piece welding machine, which has intersecting first and second directions, including: pitch changing component, pressing component and copper nozzle component.

[0004] The pitch-changing assembly includes a bracket, a pitch-changing drive unit, a linkage telescopic mechanism, and at least two pitch-changing sliders. The pitch-changing drive unit is mounted on the bracket and connected to the pitch-changing sliders to drive one of the pitch-changing sliders to move along a first direction. One end of the linkage telescopic mechanism is connected to the bracket and is capable of telescopic movement along the first direction. At least two of the pitch-changing sliders are sequentially connected to the linkage telescopic mechanism along the first direction. The linkage telescopic mechanism is used to drive multiple pitch-changing sliders to move synchronously.

[0005] The variable pitch slider is connected to the pressing component, the pressing component is movably connected to the copper nozzle component, and the pressing component is used to adjust the position of the copper nozzle component along the second direction.

[0006] The copper nozzle assembly is used to output protective gas to protect the connecting pieces during welding.

[0007] Preferably, the linkage telescopic mechanism includes a fixed linkage group and multiple adjusting linkage groups, wherein each adjusting linkage group corresponds one-to-one with the pitch slider, and the adjusting linkage group is rotatably connected to the corresponding pitch slider.

[0008] The adjusting linkage group includes a first link and a second link that are cross-arranged on the pitch slider. The first link and the second link are rotatably connected to the pitch slider, and the rotation axis of the first link is coaxial with the rotation axis of the second link. The end of the first link is rotatably connected to the end of the second link of the adjacent adjusting linkage group.

[0009] The fixed linkage group includes a third link and a fourth link that are cross-arranged on the bracket. The third link and the fourth link are rotatably connected to the bracket, and the rotation axis of the third link is coaxial with the rotation axis of the fourth link. The third link is rotatably connected to the end of the first link of the adjacent adjusting linkage group, and the fourth link is rotatably connected to the end of the second link of the adjacent adjusting linkage group.

[0010] Preferably, the bracket includes a first limiting plate and a second limiting plate arranged in parallel, and both the first limiting plate and the second limiting plate are fixedly provided with a buffer, the end of the buffer abutting the variable pitch slider.

[0011] Preferably, a plurality of guide rods are provided inside the bracket along the first direction, and the guide rods are slidably connected to the variable pitch slider to restrict the degree of freedom of the variable pitch slider.

[0012] Preferably, the bracket is fixedly connected to one of the pressing components.

[0013] Preferably, the pressing assembly includes a pressing fixed plate, a pressing sliding plate, and a pressing driving component. The pressing fixed plate is fixedly connected to the variable pitch slider, the pressing sliding plate is connected to the copper nozzle assembly, the pressing sliding plate is slidably connected to the pressing fixed plate, and the pressing driving component is used to drive the pressing sliding plate to slide along a second direction.

[0014] Preferably, the copper nozzle assembly is slidably connected to the side of the downward sliding plate away from the downward fixed plate, a pressure sensor is provided on the bottom surface of the downward sliding plate, and an abutment plate is provided on the copper nozzle assembly corresponding to the position of the pressure sensor.

[0015] Preferably, the pressing fixed plate is provided with a limiting groove, and the pressing sliding plate is provided with a limiting baffle at the position corresponding to the limiting groove. The limiting groove is used to limit the travel range of the pressing sliding plate along the second direction.

[0016] Preferably, the copper nozzle pitch changing device further includes a moving component, the moving component including a linear module extending along a first direction, the linear module being driven and connected to a first base plate, the first base plate being fixedly mounted on a second base plate, and the second base plate being fixedly connected to the bracket.

[0017] Preferably, the bracket is connected to a diversion box mounting plate, the diversion box mounting plate is provided with a protective gas diversion box, the protective gas diversion box is connected to the copper nozzle assembly fitting, and the protective gas diversion box is used to divert nitrogen to the copper nozzle assembly.

[0018] Compared with the prior art, the copper nozzle pitch-changing device of the connecting piece welding machine provided in this embodiment of the utility model has the following advantages:

[0019] In this embodiment, when the spacing of the copper nozzle assembly needs to be adjusted, the variable pitch drive unit drives the variable pitch slider to move linearly along the first direction, and then drives the other variable pitch sliders to move synchronously through the linkage telescopic mechanism. At the same time, the spacing between adjacent variable pitch sliders is kept consistent, thereby enabling the synchronous adjustment of the spacing between different copper nozzle assemblies. This realizes the automatic adjustment of the copper nozzle assembly spacing, improves the efficiency of copper nozzle assembly spacing adjustment and the efficiency of connecting piece welding production. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the pitch-changing component of this utility model;

[0022] Figure 3 This is an exploded structural diagram of the present invention;

[0023] Figure 4 This is an exploded structural diagram of the pitch-changing component of this utility model.

[0024] In the diagram: 1. Pitch-changing assembly; 11. Bracket; 111. First limiting plate; 112. Second limiting plate; 113. Buffer; 114. Protective gas distribution box; 115. Distribution box mounting plate; 116. Second rotating shaft; 12. Guide rod; 13. Pitch-changing slider; 131. First rotating shaft; 132. Sliding bearing; 14. First connecting rod; 15. Third rotating shaft; 16. Second connecting rod; 17. Pitch-changing cylinder; 18. Third connecting rod; 19. Fourth connecting rod;

[0025] 2. Pressing assembly; 21. Pressing fixing plate; 211. Limiting groove; 22. Pressing sliding plate; 221. Limiting baffle; 23. Pressing drive component; 24. Pressure sensor;

[0026] 3. Copper nozzle assembly;

[0027] 4. Moving component; 41. Linear module; 42. First base plate; 43. Second base plate. Detailed Implementation

[0028] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0029] like Figures 2 to 4 As shown, a preferred embodiment of this utility model provides a copper nozzle pitch-changing device for a connecting piece welding machine, including a pitch-changing component 1, a pressing component 2, and a copper nozzle component 3;

[0030] The pitch-changing assembly 1 includes a bracket 11, a pitch-changing drive unit, a linkage telescopic mechanism, and at least two pitch-changing sliders 13. The pitch-changing drive unit is mounted on the bracket 11 and connected to the pitch-changing sliders 13 to drive one pitch-changing slider 13 to move along a first direction X. One end of the linkage telescopic mechanism is connected to the bracket 11 and can extend and retract along the first direction X. At least two pitch-changing sliders 13 are sequentially connected to the linkage telescopic mechanism along the first direction X. The linkage telescopic mechanism is used to drive multiple pitch-changing sliders 13 to move synchronously.

[0031] The variable pitch slider 13 is connected to the pressing component 2, and the pressing component 2 is movably connected to the copper nozzle component 3. The pressing component 2 is used to adjust the position of the copper nozzle component 3 along the second direction.

[0032] The copper nozzle assembly 3 is used to output protective gas to protect the connecting pieces during welding.

[0033] Here, a first direction X, a second direction Z, and a third direction Y are defined, and the first direction X, the second direction Z, and the third direction Y are perpendicular to each other.

[0034] Specifically, due to the different spacing between the terminals of different battery modules, the spacing of the copper nozzle assemblies 3 often needs to be adjusted according to the spacing of the terminals during the welding of the connecting pieces. The conventional solution is for workers to disassemble the copper nozzle assemblies 3 and then manually adjust the position of each copper nozzle assembly 3, which is inefficient and seriously affects the production efficiency of connecting piece welding. In this embodiment, each copper nozzle assembly 3 is connected to a pitch slider 13, and multiple pitch sliders 13 are slidably connected to the bracket 11, and can all move along the first direction X within the bracket 11, which improves the efficiency of adjusting the spacing of the copper nozzle assemblies 3, thereby improving the welding efficiency of the connecting pieces. The pitch drive unit can use a pitch cylinder 17 to drive the pitch slider 13 to move along the first direction X. In other embodiments, the pitch slider 13 can also be driven by a motor structure with a screw and nut, or by a hydraulic cylinder with a hydraulic rod, etc., which can also drive the pitch slider 13 to move along the first direction X, and then drive other pitch sliders 13 to move synchronously through a linkage telescopic mechanism.

[0035] Furthermore, in some embodiments, in order to improve the stability of the variable pitch slider 13 during movement, a guide rod 12 or a limiting groove can be provided in the bracket 11 to restrict the degree of freedom of the variable pitch slider 13, thereby making the movement of the variable pitch slider 13 more stable and reliable.

[0036] In some embodiments, the linkage telescopic mechanism includes a fixed linkage group and multiple adjusting linkage groups, with each adjusting linkage group corresponding to a pitch slider 13, and the adjusting linkage group being rotatably connected to the corresponding pitch slider 13.

[0037] The adjusting linkage group includes a first link 14 and a second link 16 that are cross-arranged on the pitch slider 13. The first link 14 and the second link 16 are respectively rotatably connected to the pitch slider 13, and the rotation axis of the first link 14 is coaxial with the rotation axis of the second link 16. The end of the first link 14 is rotatably connected to the end of the second link 16 of the adjacent adjusting linkage group.

[0038] The fixed linkage group includes a third link 18 and a fourth link 19 that are cross-arranged on the bracket 11. The third link 18 and the fourth link 19 are rotatably connected to the bracket 11, and the rotation axis of the third link 18 is coaxial with the rotation axis of the fourth link 19. The third link 18 is rotatably connected to the end of the first link 14 of the adjacent adjusting linkage group, and the fourth link 19 is rotatably connected to the end of the second link 16 of the adjacent adjusting linkage group.

[0039] Specifically, in the linkage telescopic mechanism, which is a scissor-type structure, the first link 14 and the second link 16 are connected in a cross configuration, and finally connected to the bracket 11 through the third link 18 and the fourth link 19. When the variable pitch cylinder 17 drives a variable pitch slider 13 to move, the variable pitch slider 13 will drive the adjacent variable pitch slider 13 to move through the first link 14 and the second link 16, thereby driving all the variable pitch sliders 13 to move and adjusting the spacing between all adjacent variable pitch sliders 13 to be the same, thereby making the spacing between all adjacent copper nozzle assemblies 3 the same.

[0040] Furthermore, the variable pitch slider 13 is provided with a first rotating shaft 131 extending along the third direction Y, and the first rotating shaft 131 is connected to a first connecting rod 14 and a second connecting rod 16; the bracket 11 is provided with a second rotating shaft 116 extending along the third direction Y on the side away from the variable pitch cylinder 17, and the second rotating shaft 116 is connected to a third connecting rod 18 and a fourth connecting rod 19; the end of the first connecting rod 14 is provided with a third rotating shaft 15 extending along the third direction Y, and the third rotating shaft 15 is rotatably connected to the end of the second connecting rod 16 of the adjacent variable pitch slider 13. A first rotating shaft 131 is vertically located at the intersection of the first link 14 and the second link 16, and the first rotating shaft 131 is rotatably connected to the corresponding variable pitch slider 13. When it is necessary to adjust the distance between the variable pitch sliders 13, the included angle between the first link 14 and the second link 16 changes, thereby causing the position of other variable pitch sliders 13 to change. Since the two ends of the first link 14 are respectively connected to the ends of the second links 16 of the two variable pitch sliders 13, it can ensure that the distance between all adjacent variable pitch sliders 13 is the same, making it more convenient and faster to use, and the adjustment of the distance is more accurate and reliable.

[0041] In addition, it should be noted that the first link 14 and the second link 16 of the pitch slider 13 located in the middle are both equipped with the first rotating shaft 131 in the middle, while the first link 14 and the second link 16 on the pitch slider 13 located on the outer side and close to the pitch cylinder 17 have different external structures. One end of the first link 14 is connected to the third rotating shaft 15, and the other end is connected to the first rotating shaft 131.

[0042] In some embodiments, the bracket 11 includes a first limiting plate 111 and a second limiting plate 112 arranged in parallel. Both the first limiting plate 111 and the second limiting plate 112 are fixedly equipped with buffers 113, and the ends of the buffers 113 abut against the variable pitch slider 13. The two buffers 113 abut against different variable pitch sliders 13 respectively. The buffers 113 can provide support and buffer for the variable pitch slider 13, making the adjustment of the position of the variable pitch slider 13 more stable and accurate, and reducing the error caused by vibration.

[0043] In some embodiments, a plurality of guide rods 12 are provided inside the bracket 11 along the first direction X. The guide rods 12 are slidably connected to the variable pitch slider 13 to restrict the degree of freedom of the variable pitch slider 13. The variable pitch slider 13 is provided with a sliding bearing 132 corresponding to the guide rod 12. The guide rods 12 can restrict the movement direction of the variable pitch slider 13, so that the variable pitch slider 13 can only move along the first direction X, ensuring the stability of the movement of the variable pitch slider 13. The setting of the sliding bearing 132 makes the sliding of the variable pitch slider 13 smoother, and the adjustment of the spacing of the variable pitch slider 13 smoother and simpler.

[0044] In some embodiments, the support 11 is fixedly connected to a pressing component 2. For example, when facing four parts that need to be welded, in a conventional embodiment, four variable pitch sliders 13 are set up specifically to meet the welding requirements, and each variable pitch slider 13 is equipped with a pressing component 2 to meet the welding requirements. In this embodiment, only three variable pitch sliders 13 are needed, each variable pitch slider 13 is equipped with a pressing component 2, and the other pressing component 2 is fixedly set on the support 11. When adjusting the spacing, the spacing between the pressing component 2 on the support 11 and the adjacent pressing component 2 can also be adjusted synchronously. Since the copper nozzle assembly 3 and the pressing component 2 are fixedly set on the second limiting plate 112 and are not movable, the number of movable variable pitch sliders 13 is reduced, the movement space is larger, the adjustable range of the spacing is larger, and the space utilization rate is higher. Better welding protection can be achieved in a smaller space. Of course, from another perspective, this embodiment can also achieve more welding protection in a smaller space.

[0045] In some embodiments, the pressing assembly 2 includes a pressing fixed plate 21, a pressing sliding plate 22, and a pressing driving member 23. The pressing fixed plate 21 is fixedly connected to the variable pitch slider 13, the pressing sliding plate 22 is connected to the copper nozzle assembly 3, the pressing sliding plate 22 is slidably connected to the pressing fixed plate 21, and the pressing driving member 23 is used to drive the pressing sliding plate 22 to slide along the second direction Z.

[0046] Specifically, in actual use, when welding the connecting pieces, the copper nozzle assembly 3 needs to be controlled to be close to the welding point to spray cooling gas to cool and protect the connecting pieces. After welding, the copper nozzle assembly 3 needs to be controlled to be away from the welding point of the connecting pieces to facilitate the subsequent movement of the connecting pieces and the normal operation of other processes. Therefore, it is also necessary to be able to adjust the position of the copper nozzle assembly 3 in the second direction Z, that is, the vertical direction. Therefore, a pressing assembly 2 is set up, in which the pressing fixing plate 21 is fixedly connected to the pitch slider 13. This allows the pressing fixing plate 21 and the copper nozzle assembly 3 connected thereto to be adjusted together with the pitch slider 13 in the first direction X, and thus the spacing between the copper nozzle assemblies 3 can be adjusted synchronously. Based on this, one side of the downward sliding plate 22 is connected to the copper nozzle assembly 3, and the other side is slidably connected to the downward fixing plate 21. When it is necessary to adjust the position of the copper nozzle assembly 3 in the second direction Z, the downward driving component 23 can drive the downward sliding plate 22 to move along the second direction Z on the downward fixing plate 21, thereby adjusting the position of the copper nozzle assembly 3 in the second direction Z, so that the copper nozzle assembly 3 can move closer to or further away from the welding point of the connecting piece, facilitating the normal progress of the connecting piece welding work and improving the working efficiency of the connecting piece welding. In specific embodiments, the downward driving component 23 can adopt a hydraulic cylinder, a pneumatic cylinder, or a linear motor, as long as it can satisfy the effect of driving the downward sliding plate to slide in a straight line.

[0047] In some embodiments, the side of the pressing sliding plate 22 away from the pressing fixed plate 21 is slidably connected to the copper nozzle assembly 3, the bottom surface of the pressing sliding plate 22 is provided with a pressure sensor 24, and the copper nozzle assembly 3 is provided with an abutment plate corresponding to the position of the pressure sensor 24.

[0048] Specifically, in a conventional structure, the copper nozzle assembly 3 is fixedly connected to the copper nozzle component 22. However, in this embodiment, the copper nozzle assembly 3 is also slidably connected to the downward sliding plate 22, and a pressure sensor 24 is also provided at the bottom of the downward sliding plate 22. In the actual production process, after the downward driving component 23 drives the downward sliding plate 22 and the copper nozzle assembly 3 to slide down a preset distance in the second direction Z, the bottom of the copper nozzle assembly 3 will abut against the first base plate 42 or other structure. This indicates that the copper nozzle assembly 3 has reached the lowest point of its stroke. Then, the downward driving component 23 continues to push the downward sliding plate 22 to slide down in the second direction Z, and the copper nozzle assembly 3 slides upward relative to the downward sliding plate 22. The pressure sensor 24 at the bottom of the downward sliding plate 22 contacts the bottom of the copper nozzle assembly 3, applies pressure to the copper nozzle assembly 3 and measures part of the pressure, thereby enabling more precise adjustment of the position of the copper nozzle assembly 3 and making the position of the copper nozzle assembly 3 more stable and reliable.

[0049] In some embodiments, the pressing fixed plate 21 is provided with a limiting groove 211, and the pressing sliding plate 22 is provided with a limiting baffle 221 at the position corresponding to the limiting groove 211. The limiting groove 211 is used to limit the travel range of the pressing sliding plate 22 along the second direction Z. Specifically, the cooperation between the limiting groove 211 and the limiting baffle 221 in the pressing sliding plate 22 can limit the range of motion of the pressing sliding plate 22, which facilitates the precise adjustment of the position of the copper nozzle assembly 3, and the structure is more reasonable and compact.

[0050] like Figure 1 As shown, in some embodiments, the pitch-changing device further includes a moving component 4, which includes a linear module 41 extending along a first direction X. The linear module 41 is driven to be connected to a first base plate 42. The first base plate 42 is fixedly provided with a second base plate 43, and the second base plate 43 is fixedly connected to a bracket 11. Specifically, the linear module 41 can adjust the position of the entire pitch-changing device and its copper nozzle assembly 3 in the first direction X, making it easier to adapt to the welding of connecting pieces under different conditions, thus enhancing its applicability. The second base plate 43 avoids direct contact between the bracket 11 and the first base plate 42. The bracket 11 is connected to the first base plate 42 on the linear module 41 through the second base plate 43, ensuring the strength of the first base plate 42 and making the movement of the bracket 11 more stable. In particular, the groove on the second base plate 43 corresponds to the two side plates of the bracket 11. The bottom of the side plates of the bracket 11 can be inserted into the groove and fixed with bolts, making the structure of the bracket 11 more stable during the movement of the first base plate 42, which drives the second base plate 43 and the bracket 11, and less prone to shaking or displacement.

[0051] In some embodiments, the bracket 11 is connected to a distribution box mounting plate 115, which is equipped with a protective gas distribution box 114. The protective gas distribution box 114 is connected to the fittings of the copper nozzle assembly 3 and is used to distribute protective gas to the copper nozzle assembly 3. The protective gas distribution box 114 is connected to an air inlet structure and multiple air outlets via pipes. Each air outlet is connected to a different copper nozzle assembly 3, thereby distributing the protective gas to different copper nozzle assemblies 3, facilitating the copper nozzle assembly 3 to spray protective gas to protect the connecting piece. Nitrogen gas can be used as the protective gas to cool and protect the connecting piece.

[0052] In summary, this utility model embodiment provides a copper nozzle pitch-changing device for a connecting piece welding machine. The pitch-changing cylinder 17 drives the pitch-changing slider 13 to slide along the guide rod 12. Multiple pitch-changing sliders 13 slide synchronously via the first connecting rod 14, the second connecting rod 16, the third connecting rod 18, and the fourth connecting rod 19, thereby synchronously adjusting the spacing between multiple adjacent pitch-changing sliders 13. This achieves precise adjustment of the spacing between the copper nozzle assemblies 3. Finally, the downward driving component 23 drives the copper nozzle assembly 3 to move up and down along the second direction Z to adjust the final position of the copper nozzle assembly 3. This allows the copper nozzle assembly 3 to accurately spray nitrogen gas to protect the connecting piece during welding, improving overall work efficiency and reducing the inefficiency and inconvenience of frequently manually adjusting the position of the copper nozzle assembly 3 during welding.

[0053] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of this utility model, and these improvements and substitutions should also be considered within the protection scope of this utility model.

Claims

1. A copper tip pitch changing device of a tab bonder, having a first direction and a second direction which intersect, characterized in that, include: Pitch control components, pressure-down components, and copper nozzle components; The pitch-changing assembly includes a bracket, a pitch-changing drive unit, a linkage telescopic mechanism, and at least two pitch-changing sliders. The pitch-changing drive unit is mounted on the bracket and connected to the pitch-changing sliders to drive one of the pitch-changing sliders to move along a first direction. One end of the linkage telescopic mechanism is connected to the bracket and is capable of telescopic movement along the first direction. At least two of the pitch-changing sliders are sequentially connected to the linkage telescopic mechanism along the first direction. The linkage telescopic mechanism is used to drive multiple pitch-changing sliders to move synchronously. The variable pitch slider is connected to the pressing component, the pressing component is movably connected to the copper nozzle component, and the pressing component is used to adjust the position of the copper nozzle component along the second direction. The copper nozzle assembly is used to output protective gas to protect the connecting pieces during welding.

2. The copper tip pitch changing device of a tab welding machine according to claim 1, wherein The linkage telescopic mechanism includes a fixed linkage group and multiple adjusting linkage groups. Each adjusting linkage group corresponds to a pitch slider, and the adjusting linkage group is rotatably connected to the corresponding pitch slider. The adjusting linkage group includes a first link and a second link that are cross-arranged on the pitch slider. The first link and the second link are rotatably connected to the pitch slider, and the rotation axis of the first link is coaxial with the rotation axis of the second link. The end of the first link is rotatably connected to the end of the second link of the adjacent adjusting linkage group. The fixed linkage group includes a third link and a fourth link that are cross-arranged on the bracket. The third link and the fourth link are rotatably connected to the bracket, and the rotation axis of the third link is coaxial with the rotation axis of the fourth link. The third link is rotatably connected to the end of the first link of the adjacent adjusting linkage group, and the fourth link is rotatably connected to the end of the second link of the adjacent adjusting linkage group.

3. The copper tip pitch changing device of the tab bonder machine according to claim 1, wherein, The bracket includes a first limiting plate and a second limiting plate arranged in parallel. Both the first limiting plate and the second limiting plate are fixedly equipped with a buffer, and the end of the buffer abuts against the variable pitch slider.

4. The copper tip pitch changing device of the tab bonder machine according to claim 1, wherein The bracket is provided with a plurality of guide rods along a first direction, and the guide rods are slidably connected to the variable pitch slider to limit the degree of freedom of the variable pitch slider.

5. The copper tip pitch changing device of the tab bonder machine according to claim 1, wherein, The bracket is fixedly connected to one of the pressing components.

6. The copper tip pitch changing device of the tab bonder machine according to claim 5, wherein, The pressing assembly includes a pressing fixed plate, a pressing sliding plate, and a pressing driving component. The pressing fixed plate is fixedly connected to the variable pitch slider. The pressing sliding plate is connected to the copper nozzle assembly. The pressing sliding plate is slidably connected to the pressing fixed plate. The pressing driving component is used to drive the pressing sliding plate to slide along a second direction.

7. The copper nozzle pitch-changing device of the connecting piece welding machine according to claim 6, characterized in that, The copper nozzle assembly is slidably connected to the side of the downward sliding plate away from the downward fixed plate. A pressure sensor is provided on the bottom surface of the downward sliding plate, and an abutment plate is provided on the copper nozzle assembly corresponding to the position of the pressure sensor.

8. The copper tip pitch changing device of the tab bonder machine according to claim 6, wherein, The pressing fixed plate is provided with a limiting groove, and the pressing sliding plate is provided with a limiting baffle corresponding to the position of the limiting groove. The limiting groove is used to limit the travel range of the pressing sliding plate along the second direction.

9. The copper tip pitch changing device of a tab bonder according to claim 1, wherein The copper nozzle pitch changing device also includes a moving component, which includes a linear module extending along the first direction. The linear module is driven and connected to a first base plate, and the first base plate is fixedly mounted with a second base plate, which is fixedly connected to the bracket.

10. The copper tip pitch changing device of a tab bonder according to claim 1, wherein The bracket is connected to a protective gas distribution box, which is connected to the copper nozzle assembly fitting. The protective gas distribution box is used to distribute nitrogen gas to the copper nozzle assembly.

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