Tail clamp mechanism and series welding equipment

Abstract

The utility model discloses a tail clamp mechanism and series welding equipment, and belongs to the field of series welding equipment. The clamping seat is fixedly connected with the base; the clamping assembly is mounted on the clamping seat; the transmission assembly is mounted on the base and is in transmission fit with the clamping assembly, and the clamping assembly is gradually opened in response to ascending of the transmission assembly and gradually closed in response to descending of the transmission assembly; the driving structure comprises a driving air cylinder and a limiting air cylinder, the driving air cylinder is suitable for driving the transmission assembly, and the limiting air cylinder is blocked below the transmission assembly; the clamping assembly has a completely-opened state, a micro-opened state and a closed state, when the limiting air cylinder contracts, the clamping assembly responds to stretching and retracting of the driving air cylinder to be switched to the completely-opened state or the closed state, and when the limiting air cylinder stretches out, the clamping assembly responds to stretching and retracting of the driving air cylinder to be switched to the completely-opened state or the micro-opened state. According to the utility model, the welding strip can be conveniently received, and meanwhile, the welding strip can be guided when being pulled away.

Description

Technical Field

[0001] The utility model relates to a string welding device, in particular to a tail clamp mechanism and the string welding device. Background Art

[0002] Photovoltaic welding ribbon, also known as tinned copper ribbon or tin-coated copper ribbon, is used to connect the cells of photovoltaic modules and plays the role of conducting electricity. The above process requires the use of string welding equipment. When the string welding equipment is working, the traction mechanism grabs the welding ribbon and moves it outward for a distance before cutting off the welding ribbon. The traction mechanism moves the welding ribbon to the welding platform, and the tail clamp mechanism clamps the cut tail of the welding ribbon. The traction mechanism and the tail clamp mechanism cooperate with each other to tighten the welding ribbon, and then the cell is placed on the tightened welding ribbon, so that the cell and the welding ribbon are assembled and fitted, and then the tail clamp mechanism opens, and the transmission belt drives the cell and the welding ribbon to move to the next station.

[0003] The tail clamp mechanism has an open state for receiving or releasing the solder ribbon and a closed state for clamping the solder ribbon. In order to ensure that the tail clamp mechanism can smoothly receive the solder ribbon, the tail clamp mechanism opens to a large extent. When the solder ribbon is pulled out of the tail clamp mechanism after assembly, the tail of the solder ribbon is easily displaced, which is not conducive to accurate movement to the next workstation.

[0004] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0005] The utility model aims to provide a tail clamp mechanism and a string welding device. When the welding strip is pulled out of the tail clamp mechanism, the tail of the welding strip is not easy to deviate.

[0006] The purpose of the utility model is achieved through the following technical solutions: a tail clamp mechanism, comprising:

[0007] Pedestal;

[0008] A clamping seat, fixedly connected to the base;

[0009] At least one set of clamping components, mounted on the clamping seat;

[0010] A transmission assembly is installed on the base in a vertically movable manner and is in transmission cooperation with the clamping assembly. The clamping assembly gradually opens in response to the rise of the transmission assembly and gradually closes in response to the fall of the transmission assembly.

[0011] A driving structure, comprising a driving cylinder and a limiting cylinder mounted on the base, wherein the driving cylinder is suitable for driving the transmission assembly to rise and fall, and the limiting cylinder is blocked below the transmission assembly;

[0012] Wherein, the clamping assembly has a fully open state, a slightly open state and a closed state. When the limit cylinder contracts, the clamping assembly switches to the fully open state or the closed state in response to the extension and contraction of the driving cylinder. When the limit cylinder extends, the clamping assembly switches to the fully open state or the slightly open state in response to the extension and contraction of the driving cylinder.

[0013] Furthermore, the output end of the driving cylinder is connected to the transmission assembly and can rise to a first limit position or fall to a second limit position. The output end of the limiting cylinder is used to block the transmission assembly and can rise to a third limit position or fall to a fourth limit position. The third limit position is lower than the first limit position and higher than the second limit position. The fourth limit position is lower than the second limit position.

[0014] Further, when the driving cylinder rises to the first extreme position, the transmission assembly drives the clamping assembly to be in the fully open state; when the driving cylinder descends to the second extreme position, the transmission assembly drives the clamping assembly to be in the closed state; when the output end of the limit cylinder is in the third extreme position, the transmission assembly responds to the descent of the driving cylinder and abuts against the output end of the limit cylinder, and drives the clamping assembly to be in the slightly open state.

[0015] Furthermore, there are multiple groups of the clamping assemblies, which are arranged at intervals along the first horizontal direction, and the transmission assembly is suitable for driving the multiple groups of the clamping assemblies to open and close synchronously.

[0016] Furthermore, the clamping assembly comprises:

[0017] A connecting shaft, fixed to the clamping seat, and with its axial direction parallel to the second horizontal direction;

[0018] A left tail clip is rotatably sleeved on the connecting shaft;

[0019] A right tail clip is drivably sleeved on the connecting shaft;

[0020] An elastic member connected between the left tail clip and the right tail clip;

[0021] Wherein, the left tail clamp and the right tail clamp both have a clamping part and a transmission part, and the two transmission parts are both transmission-connected to the transmission assembly. When the transmission assembly rises, it is suitable for pushing the two transmission parts to drive the two clamping parts to rotate in opposite directions and compress the elastic member. When the transmission assembly descends, the two clamping parts are suitable for rotating toward each other under the rebound of the elastic member.

[0022] Furthermore, the clamping seat is located above the transmission assembly, and a mounting hole is opened through the clamping seat in the vertical direction. The connecting shaft is at least partially located in the mounting hole, the left tail clip and the right tail clip are accommodated in the mounting hole, and the clamping part extends out of the top end of the mounting hole, and the transmission part extends out of the bottom end of the mounting hole.

[0023] Furthermore, the transmission assembly comprises:

[0024] A transmission plate is slidably connected to the base, the output end of the driving cylinder is connected to the transmission plate, and the limit cylinder is blocked below the transmission plate;

[0025] A transmission seat is arranged on the transmission plate and corresponds to the clamping assembly one by one. The transmission seat includes a seat body and a guide member. The seat body is provided with an avoidance hole in the vertical direction. The guide member is installed on the seat body. There are two guide members, which are arranged relatively on both sides of the top of the avoidance hole along a first horizontal direction perpendicular to the second horizontal direction.

[0026] Wherein, the two transmission parts are both arranged in the avoidance hole, and are suitable for respectively abutting against different guide members under the action of the elastic member, and the transmission parts move closer to each other in response to the rising of the guide member.

[0027] Furthermore, the two abutting portions are not staggered in the second horizontal direction, and the two transmission portions are staggered in the second horizontal direction.

[0028] Furthermore, the guide member is a round rod whose axial direction is parallel to the second horizontal direction, the guide member is rotatably connected to the seat body, and a surface of the transmission part in contact with the guide member is an inclined surface.

[0029] In addition, the utility model also provides a string welding device, including the aforementioned tail clamp mechanism.

[0030] Compared with the prior art, the utility model has the following beneficial effects: the utility model sets a driving cylinder and a limiting cylinder. When the limiting cylinder is in a retracted state, the clamping assembly switches to a fully open state or a closed state in response to the extension and retraction of the driving cylinder. When the limiting cylinder is in an extended state, the clamping assembly switches to a fully open state or a slightly open state in response to the extension and retraction of the driving cylinder. When it is necessary to receive and clamp the welding strip, the limiting cylinder switches to a retracted state, and the clamping assembly can be in a fully open state under the action of the driving cylinder to better receive the material strip, and then switches to a closed state under the action of the driving cylinder to clamp the tail of the welding strip for assembly. When the welding strip and the battery cell are assembled, the limiting cylinder switches to an extended state, and the clamping assembly can be in a slightly open state under the action of the driving cylinder, so that the clamping assembly releases the welding strip, and when the welding strip is pulled out of the clamping assembly, the tail of the welding strip can be guided and limited by the clamping assembly to prevent the tail of the welding strip from being offset, thereby ensuring that it is reliably and accurately moved to the next workstation. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the tail clamp mechanism of the utility model.

[0032] Figure 2 It is a schematic diagram of the exploded structure of the clamping assembly and the transmission seat in the utility model.

[0033] Figure 3 It is a schematic diagram of the exploded structure of the clamping assembly in the utility model.

[0034] Figure 4 It is a schematic diagram of the installation of the clamping seat and the connecting shaft in the utility model.

[0035] Description of reference numerals:

[0036] 100, base; 110, vertical plate; 120, slide rail assembly; 200, clamping seat; 210, mounting hole; 300, clamping assembly; 310, connecting shaft; 320a, left tail clamp; 320b, right tail clamp; 321, clamping part; 322, transmission part; 323, mounting part; 324, first lug; 325, second lug; 326, socket hole; 330, elastic member; 400, transmission assembly; 410, transmission plate; 420, transmission seat; 421, seat body; 4211, avoidance hole; 422, guide member; 510, driving cylinder; 520, limit cylinder. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] See also Figure 1 As shown, a tail clamp mechanism corresponding to a preferred embodiment of the utility model comprises: a base 100; a clamping base 200, which is fixedly connected to the base 100; at least one set of clamping assemblies 300, which are mounted on the clamping base 200; a transmission assembly 400, which can be mounted on the base 100 in a vertical direction and is in transmission cooperation with the clamping assembly 300, and the clamping assembly 300 gradually opens in response to the rise of the transmission assembly 400, and gradually closes in response to the descent of the transmission assembly 400; a driving structure, including a driving air valve mounted on the base 100; Cylinder 510 and limiting cylinder 520, the driving cylinder 510 is suitable for driving the transmission assembly 400 to rise and fall, and the limiting cylinder 520 is blocked under the transmission assembly 400; wherein, the clamping assembly 300 has a fully open state, a slightly open state and a closed state, when the limiting cylinder 520 contracts, the clamping assembly 300 switches to a fully open state or a closed state in response to the extension and retraction of the driving cylinder 510, and when the limiting cylinder 520 extends, the clamping assembly 300 switches to a fully open state or a slightly open state in response to the extension and retraction of the driving cylinder 510.

[0041] The utility model is provided with a driving cylinder 510 and a limiting cylinder 520. When the limiting cylinder 520 is in a retracted state, the clamping assembly 300 switches to a fully open state or a closed state in response to the extension and contraction of the driving cylinder 510. When the limiting cylinder 520 is in an extended state, the clamping assembly 300 switches to a fully open state or a slightly open state in response to the extension and contraction of the driving cylinder 510. When it is necessary to receive and clamp the welding strip, the limiting cylinder 520 switches to a retracted state, and the clamping assembly 300 can be in a fully open state under the action of the driving cylinder 510. , so as to better receive the material strip, and then switch to the closed state under the action of the driving cylinder 510 to clamp the tail of the welding strip and perform the assembly operation; when the welding strip and the battery cell are assembled, the limiting cylinder 520 switches to the extended state, and the clamping assembly 300 can be in a slightly open state under the action of the driving cylinder 510, so that the clamping assembly 300 releases the welding strip, and when the welding strip is pulled out of the clamping assembly 300, the tail of the welding strip can be guided and limited by the clamping assembly 300 to prevent the tail of the welding strip from deviating, thereby ensuring that it can be reliably and accurately moved to the next station.

[0042] Furthermore, the driving cylinder 510 and the limiting cylinder 520 are located directly below the transmission assembly 400, and the output ends of both are arranged upward so as to rise and fall in the vertical direction. The output end of the driving cylinder 510 is connected to the transmission assembly 400, and can rise to the first limit position or fall to the second limit position. The output end of the limiting cylinder 520 is used to block the transmission assembly 400, and can rise to the third limit position or fall to the fourth limit position. The third limit position is lower than the first limit position and higher than the second limit position, and the fourth limit position is lower than the second limit position.

[0043] When the driving cylinder 510 rises to the first extreme position, the transmission assembly 400 drives the clamping assembly 300 to be in a fully open state. When the driving cylinder 510 descends to the second extreme position, the transmission assembly 400 drives the clamping assembly 300 to be in a closed state. When the output end of the limiting cylinder 520 is in the third extreme position, the transmission assembly 400 responds to the descent of the driving cylinder 510 and abuts against the output end of the limiting cylinder 520, and drives the clamping assembly 300 to be in a slightly open state.

[0044] The driving cylinder 510 and the limiting cylinder 520 cooperate with each other to realize the switching of the clamping assembly 300 between a fully open state, a slightly open state and a closed state. The driving cylinder 510 and the limiting cylinder 520 only need to adopt conventional linear cylinders, which have a simple structure, low cost, and easy control, and the state switching of the clamping assembly 300 is very reliable.

[0045] Furthermore, the clamping seat 200 is located above the transmission assembly 400 and is a long block structure extending along the first horizontal direction. There are multiple groups of clamping assemblies 300, which are arranged on the clamping seat 200 at intervals along the first horizontal direction. The transmission assembly 400 can drive multiple groups of clamping assemblies 300 to open and close synchronously so as to clamp different welding strips respectively, thereby improving assembly efficiency. The base 100 has vertical plates 110 extending upward on both sides of the first horizontal direction, and the two ends of the clamping seat 200 are fixed to different vertical plates 110 respectively.

[0046] Further, refer to Figures 2 to 4 As shown, the clamping assembly 300 is located above the transmission assembly 400, and includes a connecting shaft 310, a left tail clip 320a, a right tail clip 320b and an elastic member 330. The connecting shaft 310 is fixed to the clamping seat 200 along the second horizontal direction. The left tail clip 320a and the right tail clip 320b can be rotatably sleeved on the connecting shaft 310, and the elastic member 330 is connected between the left tail clip 320a and the right tail clip 320b. The left tail clip 320a and the right tail clip 320b both have a clamping portion 321 and a transmission portion 322, and the two transmission portions 322 are both transmission-connected with the transmission assembly 400. When the transmission assembly 400 rises, it is suitable for pushing the two transmission portions 322 to drive the two clamping portions 321 to rotate in opposite directions and compress the elastic member 330. When the transmission assembly 400 descends, the two clamping portions 321 are suitable for rotating toward each other under the rebound of the elastic member 330. When the two clamping parts 321 rotate in opposite directions, they move away from each other to achieve the opening of the clamping assembly 300 . When the two clamping parts 321 move toward each other, they move toward each other to achieve the closing of the clamping assembly 300 .

[0047] Preferably, the clamping seat 200 is provided with a mounting hole 210 through it in the vertical direction, and the mounting hole 210 corresponds to the clamping assembly 300 one by one. The connecting shaft 310 is at least partially located in the mounting hole 210. The left tail clip 320a and the right tail clip 320b are both received in the mounting hole 210 and sleeved on the portion of the connecting shaft 310 located in the mounting hole 210. The clamping portion 321 extends out of the mounting hole 210 from the top end of the mounting hole 210, and the transmission portion 322 extends out of the mounting hole 210 from the bottom end of the mounting hole 210. By providing the mounting hole 210, it can effectively limit the left tail clip 320a and the right tail clip 320b to prevent the connecting shaft 310 from loosening, and the left tail clip 320a and the right tail clip 320b can be more reliably formed after installation. The mounting hole 210 is preferably a square hole to more compactly accommodate the left tail clip 320a and the right tail clip 320b.

[0048] Preferably, the two clamping parts 321 are not staggered in the second horizontal direction to ensure that the two clamping parts 321 can cooperate to clamp or release the welding strip. The two transmission parts 322 are staggered in the second horizontal direction so that the two transmission parts 322 are not easily limited by each other when they are close to each other, ensuring that the two clamping parts 321 are opened and closed to the required angle while reducing the size of the mounting hole 210.

[0049] In addition, a mounting portion 323 is connected between the clamping portion 321 and the transmission portion 322 of the left tail clip 320a and the right tail clip 320b, and the two mounting portions 323 are arranged opposite to each other in the first horizontal direction. Preferably, the mounting portion 323 of the left tail clip 320a is provided with a first lug 324 on one side facing the right tail clip 320b, and the mounting portion 323 of the right tail clip 320b is provided with a second lug 325 on one side facing the left tail clip 320a, and the number of the second lugs 325 is two and they are arranged at intervals along the second horizontal direction, the first lug 324 is suitable for being inserted between the two second lugs 325, and the first lug 324 is respectively in contact with different second lugs 325 on both sides of the second horizontal direction, and the first lug 324 and the second lug 325 are both provided with sleeve holes 326 through the second horizontal direction to be sleeved outside the connecting shaft 310. By adopting the above structure, the left tail clip 320a and the right tail clip 320b are easy to install, and will not move relative to each other in the second horizontal direction, and the reliability after installation is good. The elastic member 330 is a spring connected between the two mounting parts 323, and the elastic member 330 is located below the sleeve hole 326. Preferably, the two second lugs 325 are adapted to be in contact with the inner wall of the mounting hole 210 on the opposite sides, so as to effectively limit the entire clamping assembly 300 in the second horizontal direction.

[0050] Further, refer to Figure 1 and Figure 2 As shown, the transmission assembly 400 includes a transmission plate 410 and a transmission base 420 installed on the transmission plate 410. The transmission plate 410 is slidably connected to the base 100 so as to be lifted and lowered in the vertical direction. The transmission base 420 is in transmission cooperation with the transmission part 322. The output end of the driving cylinder 510 is connected to the transmission plate 410, and the limiting cylinder 520 is blocked below the transmission plate 410.

[0051] Furthermore, the transmission plate 410 is a long strip plate with two sides extending to different vertical plates 110 along the first horizontal direction. The two vertical plates 110 are provided with slide rail assemblies 120 arranged along the vertical direction. The transmission plate 410 is connected to different slide rail assemblies 120 on both sides of the first horizontal direction. The output end of the driving cylinder 510 is connected to the middle area of ​​the transmission plate 410 in the first horizontal direction, so that the lifting and lowering of the transmission plate 410 is more reliable. The limit cylinder 520 is located on one side of the driving cylinder 510 in the first horizontal direction and is close to the driving cylinder 510.

[0052] Furthermore, since there are multiple groups of clamping assemblies 300, there are multiple transmission seats 420, and they correspond to the clamping assemblies 300 one by one, so that the transmission assembly 400 can drive multiple clamping assemblies 300 to open and close synchronously. The transmission seat 420 includes a seat body 421 and a guide member 422. The seat body 421 is detachably mounted on the transmission plate 410, and a avoidance hole 4211 is provided through it in the vertical direction. The guide member 422 is mounted on the seat body 421. There are two guide members 422, and they are arranged relatively on both sides of the top of the avoidance hole 4211 along the first horizontal direction. The bottom ends of the two transmission parts 322 are both penetrated in the avoidance hole 4211, and are suitable for respectively abutting against different guide members 422 under the action of the elastic member 330. The transmission parts 322 move closer to each other in response to the rise of the guide member 422, thereby driving the clamping parts 321 away from each other.

[0053] The side of the transmission part 322 in contact with the guide member 422 is an inclined surface, and the inclined surface gradually inclines from top to bottom in a direction away from the guide member 422, so as to guide the rotation of the transmission part 322 during the lifting process. Preferably, the guide member 422 is a round rod with an axial direction parallel to the second horizontal direction, and the guide member 422 is rotatably connected to the seat body 421, so that there is rolling friction between the inclined surface of the transmission part 322 and the guide member 422, and the friction force is small compared to sliding friction, the transmission part 322 is not easy to wear, and the rotation is smoother.

[0054] The working process of the tail clamp mechanism of the utility model is as follows: initially, the limit cylinder 520 moves to the fourth limit position, and the driving cylinder 510 moves upward to the first limit position, so that the clamping assembly 300 is in a fully open state; after the clamping assembly 300 receives the welding strip, the driving cylinder 510 moves toward the second limit position to clamp the welding strip; after the welding strip and the battery cell are assembled, the driving cylinder 510 moves upward back to the first limit position, and at the same time, the limit cylinder 520 moves upward synchronously to the third limit position, and then the driving cylinder 510 moves downward until it is limited by the driving cylinder 510, and the clamping assembly 300 is in a slightly open state, so as to guide and limit it during the removal of the welding strip.

[0055] In addition, the utility model also provides a string welding device, including the aforementioned tail clamp mechanism.

[0056] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A tail clamp mechanism, characterized in that: include: Base(100); A clamping seat (200) fixedly connected to the base (100); At least one set of clamping components (300) mounted on the clamping seat (200); A transmission assembly (400) is installed on the base (100) so as to be lifted and lowered in a vertical direction, and is in transmission cooperation with the clamping assembly (300), wherein the clamping assembly (300) gradually opens in response to the rise of the transmission assembly (400), and gradually closes in response to the fall of the transmission assembly (400); A driving structure, comprising a driving cylinder (510) and a limiting cylinder (520) mounted on the base (100), wherein the driving cylinder (510) is suitable for driving the transmission assembly (400) to move up and down, and the limiting cylinder (520) is blocked below the transmission assembly (400); The clamping assembly (300) has a fully open state, a slightly open state and a closed state. When the limiting cylinder (520) contracts, the clamping assembly (300) switches to the fully open state or the closed state in response to the extension and retraction of the driving cylinder (510). When the limiting cylinder (520) extends, the clamping assembly (300) switches to the fully open state or the slightly open state in response to the extension and retraction of the driving cylinder (510).

2. The tail clamp mechanism according to claim 1, characterized in that: The output end of the driving cylinder (510) is connected to the transmission assembly (400) and can rise to a first limit position or fall to a second limit position. The output end of the limiting cylinder (520) is used to block the transmission assembly (400) and can rise to a third limit position or fall to a fourth limit position. The third limit position is lower than the first limit position and higher than the second limit position. The fourth limit position is lower than the second limit position.

3. The tail clamp mechanism according to claim 2, characterized in that: When the driving cylinder (510) rises to the first extreme position, the transmission assembly (400) drives the clamping assembly (300) to be in the fully open state; when the driving cylinder (510) descends to the second extreme position, the transmission assembly (400) drives the clamping assembly (300) to be in the closed state; when the output end of the limiting cylinder (520) is in the third extreme position, the transmission assembly (400) responds to the descent of the driving cylinder (510) and abuts against the output end of the limiting cylinder (520), and drives the clamping assembly (300) to be in the slightly open state.

4. The tail clamp mechanism according to claim 1, characterized in that: The clamping assemblies (300) are provided in a plurality of groups and are arranged at intervals along a first horizontal direction, and the transmission assembly (400) is suitable for driving the plurality of groups of the clamping assemblies (300) to open and close synchronously.

5. The tail clamp mechanism according to claim 1, characterized in that: The clamping assembly (300) comprises: A connecting shaft (310) is fixed to the clamping seat (200) and has an axial direction parallel to the second horizontal direction; A left tail clip (320a) rotatably sleeved on the connecting shaft (310); A right tail clip (320b) drivably sleeved on the connecting shaft (310); An elastic member (330) connected between the left tail clip (320a) and the right tail clip (320b); Wherein, the left tail clamp (320a) and the right tail clamp (320b) both have a clamping portion (321) and a transmission portion (322); the two transmission portions (322) are both transmission-connected to the transmission assembly (400); when the transmission assembly (400) rises, it is suitable for pushing the two transmission portions (322) to drive the two clamping portions (321) to rotate in opposite directions and compress the elastic member (330); when the transmission assembly (400) descends, the two clamping portions (321) are suitable for rotating towards each other under the rebound of the elastic member (330).

6. The tail clamp mechanism according to claim 5, characterized in that: The clamping seat (200) is located above the transmission assembly (400), and a mounting hole (210) is provided on the clamping seat (200) along a vertical direction. The connecting shaft (310) is at least partially located in the mounting hole (210), the left tail clamp (320a) and the right tail clamp (320b) are accommodated in the mounting hole (210), and the clamping portion (321) extends out of the top end of the mounting hole (210), and the transmission portion (322) extends out of the bottom end of the mounting hole (210).

7. The tail clamp mechanism according to claim 5, characterized in that: The transmission assembly (400) comprises: A transmission plate (410) is slidably connected to the base (100), an output end of the driving cylinder (510) is connected to the transmission plate (410), and the limiting cylinder (520) is blocked below the transmission plate (410); A transmission seat (420) is arranged on the transmission plate (410) and corresponds one-to-one with the clamping assembly (300). The transmission seat (420) comprises a seat body (421) and a guide member (422). The seat body (421) is provided with an avoidance hole (4211) extending through the seat body (421) in a vertical direction. The guide member (422) is mounted on the seat body (421). There are two guide members (422) and they are arranged relatively on both sides of the top of the avoidance hole (4211) along a first horizontal direction perpendicular to a second horizontal direction. Wherein, the two transmission parts (322) are both arranged in the avoidance hole (4211), and are suitable for respectively abutting against different guide members (422) under the action of the elastic member (330), and the transmission parts (322) move closer to each other in response to the rise of the guide member (422).

8. The tail clamp mechanism according to claim 7, characterized in that: The two clamping parts (321) are not staggered in the second horizontal direction, and the two transmission parts (322) are staggered in the second horizontal direction.

9. The tail clamp mechanism according to claim 7, characterized in that: The guide member (422) is a round rod whose axial direction is parallel to the second horizontal direction; the guide member (422) is rotatably connected to the seat body (421); and a surface of the transmission part (322) in contact with the guide member (422) is an inclined surface.

10. A string welding device, characterized in that: It comprises the tail clamp mechanism as claimed in any one of claims 1 to 9.

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