Dust removal equipment and collector plate welding equipment of cylindrical battery

Abstract

The utility model discloses dust removal equipment in the technical field of battery production and collector plate welding equipment of a cylindrical battery, and aims to solve the problem of dust cleaning in the collector plate welding process in the prior art. The dust removal equipment comprises a first dust removal device and a second dust removal device fixedly connected with the first dust removal device; the first dust removal device is provided with a first main cavity, and the second dust removal device is provided with a second main cavity communicated with the first main cavity in a penetrating manner, so that light beams can penetrate through the first main cavity and the second main cavity; a plurality of negative pressure suction ports are formed in the first main cavity and are connected with a first negative pressure pipeline; a negative pressure outlet and a positive pressure air knife outlet are formed in the second main cavity, the negative pressure outlet is connected with a second negative pressure pipeline, and the positive pressure air knife outlet is connected with a positive pressure pipeline. On-line cleaning of welding dust is achieved through the stacked dust removal mechanism, production efficiency is remarkably improved, and labor cost is saved; welding fume can be cleaned, and welding gun lens damage caused by overflow of metal particles can be prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of dust removal equipment and the current collector disc welding equipment of cylindrical battery, belong to battery production technical field. BACKGROUND

[0002] In the production process of cylindrical lithium ion battery, after winding core is completed in aluminum shell, current collector disc needs to be welded in winding core end face.Currently, current collector disc welding basically adopts laser spot welding process, and a large amount of metal particle dust can be generated in the process, which can cause short circuit and scrap of the battery if the dust enters the winding core or the aluminum shell.In addition, the overflow dust during welding can impact the laser head mirror and cause abnormal light output, so it is necessary to clean the dust during the current collector disc welding process.

[0003] The existing laser welding station uses pure negative pressure to remove dust, and the dust removal tool is basically a horn structure.The negative pressure in the dust removal tool is not evenly distributed, and large particle dust during welding is difficult to capture by negative pressure, and overflow dust removal can damage the laser mirror. SUMMARY

[0004] The utility model solves the technical problem of overcoming the defects of the prior art, and provides a dust removal equipment and a current collector disc welding equipment for cylindrical battery, which can effectively prevent metal particles from overflowing by using a positive and negative pressure cooperation method for dust removal.

[0005] To solve the above technical problems, the utility model provides a dust removal equipment, which comprises: a first dust removal device and a second dust removal device fixedly connected with the first dust removal device.

[0006] The first dust removal device is provided with a first main cavity, and the second dust removal device is provided with a second main cavity which is in communication with the first main cavity, so that the first main cavity and the second main cavity can be penetrated by a light beam.

[0007] A plurality of negative pressure suction ports are arranged in the first main cavity, and the negative pressure suction ports are connected with a first negative pressure pipeline.

[0008] The second main cavity is provided with a negative pressure outlet and a positive pressure air knife outlet, the negative pressure outlet is connected with a second negative pressure pipeline, and the positive pressure air knife outlet is connected with a positive pressure pipeline.

[0009] The above technical solution realizes online cleaning of welding dust through a stacked dust removal mechanism, significantly improves production efficiency and saves labor cost, can clean welding dust and prevent damage to the welding gun lens caused by metal particle overflow, and effectively ensures the welding stability and the qualified rate.

[0010] Further, the first dust removal device is provided with a first negative pressure pipe opening for connecting a first negative pressure pipe on both sides of the first dust removal device and communicated with the first main cavity.

[0011] The above technical solution can increase the negative pressure air flow by setting two negative pressure suction openings to maximize the dust suction in the space.

[0012] Further, the negative pressure suction opening is a long slot type opening with gradually changing diameter.

[0013] The above technical solution can ensure uniform air speed by setting the long slot type opening with gradually changing diameter.

[0014] Further, a through hole is formed above the positive pressure air knife outlet to connect the workshop compressed air, and the second dust removal device is provided with a second negative pressure pipe opening for connecting a second negative pressure pipe on both sides of the second dust removal device and communicated with the second main cavity; the positive pressure air knife outlet is symmetrically arranged with the negative pressure outlet as the center.

[0015] The above technical solution can form a wind curtain to prevent dust overflow by setting the positive pressure air knife, and the positive pressure opening is directly opposite to the negative pressure opening, so that the positive pressure air blown out can be directly sucked into the negative pressure opening, and the dust in the positive pressure air can be sucked away by the negative pressure.

[0016] In a second aspect, the present application also provides a current collector plate welding device for cylindrical batteries, which comprises a dust removal device, a welding device and a current collector plate carrying and transferring device.

[0017] The welding device is located behind the second dust removal device, and a welding laser beam emitted by the welding device penetrates through the first main cavity of the first dust removal device and the second main cavity of the second dust removal device.

[0018] The current collector plate carrying and transferring device is located below the first dust removal device and is used to carry the current collector plate to the welding position.

[0019] The current collector plate welding device for cylindrical batteries has compact structure and high precision, and can realize assembly line production in a small area; the current collector plate carrying assembly and the current collector plate positioning and welding assembly can rotate the current collector plate from the horizontal direction to the vertical direction, accurately position the current collector plate on the welding base plate through the telescopic cylinder, have high positioning precision, stable rhythm, and can significantly improve the production efficiency; the welding torch can be adjusted at any position before welding to ensure the defocus amount. The device can be adapted to welding of products with different positions and sizes, has strong applicability, and can realize batch assembly line production.

[0020] Further, a welding base plate is arranged in the first main cavity.

[0021] The welding bottom plate is arranged to ensure the welding quality.

[0022] Further, the welding device comprises a position adjusting mechanism fixed on the welding stand, a support frame fixed on the position adjusting mechanism, and a short shaft rotatably connected with the support frame, two groups of laser gun heads are connected into one body and fixedly connected with the short shaft, and the short shaft is used for adjusting the spatial position of the laser gun heads.

[0023] The above technical solution can fix two groups of laser gun heads on the short shaft which is rotatable with the support frame, so as to adjust the spatial position of the laser gun heads, adjust the welding gun at any position, and adjust the welding gun at any position before welding through the cooperation of the position adjusting mechanism and the short shaft, thereby ensuring the defocusing amount of welding.

[0024] Further, the position adjusting mechanism comprises a linear screw, a sliding block sliding rail, a rotating hand wheel, a micrometer adjusting assembly, and a first intermediate plate.

[0025] The rotating hand wheel is connected with the linear screw through bolts, the linear screw is connected with the first intermediate plate, and the second intermediate plate is fixed on the first intermediate plate through the micrometer adjusting assembly.

[0026] The above technical solution can move the welding gun assembly horizontally through the rotating hand wheel, and can accurately adjust the vertical displacement of the welding gun through the micrometer.

[0027] Further, the current collector plate carrying and transferring device comprises a current collector plate carrying assembly, and the current collector plate carrying assembly comprises an electric sliding table, a connecting part, and a current collector plate first positioning clamp jaw.

[0028] The connecting part is fixed on the sliding block of the electric sliding table, and the current collector plate first positioning clamp jaw is fixed on the upper end of the connecting part.

[0029] The above technical solution can complete the feeding and horizontal carrying actions of the current collector plate through the current collector plate carrying assembly, and deliver the current collector plate to the positioning and welding assembly.

[0030] Further, the current collector plate carrying and transferring device further comprises a current collector plate positioning and welding assembly which cooperates with the current collector plate carrying and transferring device to grasp the current collector plate, and the current collector plate positioning and welding assembly comprises a rotating motor and a rotating tool, and the rotating motor is connected with the rotating tool through a shaft coupling.

[0031] The rotating tool includes a tool base plate, an intermediate fixing plate, a current collecting disc second positioning clamp jaw and a telescopic cylinder; the telescopic cylinder is fixed on the tool base plate, and a push head of the telescopic cylinder is connected with the intermediate fixing plate; the intermediate fixing plate is slidably connected with the tool base plate; a plurality of groups of the current collecting disc second positioning clamp jaw are fixed on the intermediate fixing plate, and the current collecting disc second positioning clamp jaw is used for grabbing the current collecting disc on the current collecting disc first positioning clamp jaw from a target position.

[0032] The current collecting disc positioning and welding assembly can rotate the current collecting disc from a horizontal direction to a vertical direction and transport the current collecting disc to the welding base plate through the telescopic cylinder.

[0033] The utility model discloses reached beneficial effects of:

[0034] (1) the dust collector of the utility model, through the laminated dust removal mechanism, realize welding dust on -line cleaning, improve production efficiency significantly, save manpower cost, can clean welding fume and prevent the damage of welding torch lens caused by metal particle overflow, effectively guarantee the welding stability and the qualified rate.

[0035] (2) the cylindrical battery's current collecting disc welding equipment structure of the utility model is compact, precision is high, realizes assembly line production under the condition of smaller floor area, through current collecting disc carrying assembly and current collecting disc positioning and welding assembly can rotate the current collecting disc from a horizontal direction to a vertical direction and transport the current collecting disc to the welding base plate through the telescopic cylinder, and the positioning precision is high, and the beat is stable, and production efficiency can be improved significantly, the welding torch can be adjusted at any position before the utility model is welded, and the welding defocus amount is guaranteed, a plurality of different positions and sizes of products can be welded, and the applicability is strong, and batch assembly line production can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a cylindrical battery's current collecting disc welding and dust removal device schematic view of the utility model embodiment;

[0037] Figure 2 It is the connection schematic view of the second dust removal device fixedly connected with the first dust removal device;

[0038] Figure 3 It is the first dust removal device schematic view of the utility model embodiment;

[0039] Figure 4 It is the second dust removal device schematic view of the utility model embodiment;

[0040] Figure 5 It is the welding device schematic view of the utility model embodiment;

[0041] Figure 6 It is the position adjusting device schematic view of the utility model embodiment;

[0042] Figure 7 This is a schematic diagram of the welding positioning device according to an embodiment of the present utility model;

[0043] Figure 8 This is a schematic diagram of the collection plate transport and transfer device according to an embodiment of the present utility model.

[0044] In the diagram: 1. Dust removal equipment; 11. First dust removal device; 12. Second dust removal device; 111. First main cavity; 112. First negative pressure suction port; 113. Second negative pressure suction port; 114. First negative pressure pipe port; 115. Welding base plate; 121. Second main cavity; 122. Second negative pressure pipe port; 123. Negative pressure outlet; 124. Positive pressure air knife outlet; 125. Threaded hole; 2. Welding device; 21. Welding column; 22. Position adjustment mechanism; 23. Support frame; 24. Laser gun head; 221. Rotating handwheel; 222. Linear lead screw; 223. First intermediate plate; 224. Sliding rail; 225. Micrometer adjustment assembly; 226. Second intermediate plate; 3. Collector plate transport and transfer device; 31. Positioning welding assembly; 32. Collector plate transport assembly; 311. Rotary motor; 312. Telescopic cylinder; 313. Collector plate second positioning gripper; 314. Intermediate fixing plate; 315. Tooling base plate; 321. Electric slide table; 322. Fixed base plate; 323. Intermediate connecting plate; 324. Fixing plate; 325. Collector plate first positioning gripper. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0046] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] Example 1, as Figures 1-4 This embodiment provides a dust removal device, including: a first dust removal device 11 and a second dust removal device 12 fixedly connected to the first dust removal device 11;

[0049] The first dust removal device 11 is provided with a first main cavity 111, and the second dust removal device 12 is provided with a second main cavity 121 that is in communication with the first main cavity 111, so that the first main cavity 111 and the second main cavity 121 can be penetrated by the light beam;

[0050] The first main cavity 111 is provided with a plurality of negative pressure suction ports, and the negative pressure suction ports are connected to the first negative pressure pipe;

[0051] The second main cavity 121 is provided with a negative pressure outlet 123 and a positive pressure air knife outlet 124. The negative pressure outlet 123 is connected to the second negative pressure pipe, and the positive pressure air knife outlet 124 is connected to the positive pressure pipe.

[0052] The first dust removal device 11 has first negative pressure ports 114 on both sides that communicate with the first main cavity 111 for connecting to the first negative pressure pipe.

[0053] The negative pressure suction port includes a first negative pressure suction port 112 and a second negative pressure suction port 113. The first negative pressure suction port 112 is located directly in front of the first negative pressure pipe port 114, and the second negative pressure suction port 113 is located to the side and above the first negative pressure pipe port 114.

[0054] To ensure uniform airflow, the negative pressure suction port is a long groove-shaped port with a gradually changing diameter.

[0055] A through hole is opened above the positive pressure air knife outlet 124 to connect to the workshop compressed air, and second negative pressure pipe ports 122 are opened on both sides of the second dust removal device 12 to connect to the second negative pressure pipe and communicate with the second main cavity 121.

[0056] The positive pressure air knife outlet 124 is symmetrically arranged with the negative pressure outlet 123 as the center of symmetry.

[0057] Example 2, as Figures 1-8As shown, this embodiment provides a current collector welding device for cylindrical batteries, including a dust removal device 1, a welding device 2, and a current collector transport and transfer device 3;

[0058] The dust removal equipment 1 includes: a first dust removal device 11 and a second dust removal device 12; the first dust removal device 11 and the second dust removal device 12 are fixed together as a whole by bolts, and the internal cavity (first main cavity 111) of the first dust removal device 11 and the internal cavity (second main cavity 121) of the second dust removal device 12 are in continuous communication; the welding device 2 is located behind the second dust removal device 12 and the welding laser beam can penetrate through the internal cavity of the second dust removal device 12 of the first dust removal device 11. The collector plate transport and transfer device 3 is located below the first dust removal device 11.

[0059] The first dust removal device 11 includes a first main cavity 111, within which multiple negative pressure suction ports are provided, including a first negative pressure suction port 112 and a second negative pressure suction port 113. The first negative pressure suction port 112 is located directly in front of a first negative pressure pipe opening 114, and the second negative pressure suction port 113 is located to the side and above the suction pipe opening. To ensure uniform airflow, the suction ports are designed as elongated slot-shaped openings with gradually changing diameters. A welded base plate 115 is installed on the front surface of the first dust removal device to ensure welding quality. First negative pressure pipe openings 114 are opened on both sides of the first dust removal device 11 for connecting negative pressure pipes.

[0060] The second dust removal device 12 includes a second main cavity 121; multiple outlets are provided within the second main cavity 121, including a negative pressure outlet 123 and positive pressure air knife outlets 124 symmetrically arranged with the negative pressure outlet 123 as the center of symmetry; the structure of the negative pressure outlet 123 is mirror-symmetrical to the first negative pressure suction port 112. A threaded hole 125 is opened above the positive pressure air knife outlet 124 to connect to the workshop compressed air. Negative pressure pipe ports are opened on both sides of the second dust removal device 12 for connecting negative pressure pipelines.

[0061] The welding device 2 includes a position adjustment mechanism 22 fixed on the welding column 21, a support frame 23 fixed on the position adjustment mechanism 22, and two sets of laser gun heads 24 installed on the support frame 23. The two sets of laser gun heads 24 are connected as one unit by a second support plate and fixed on the support frame by a short shaft. The spatial position of the laser gun head can be adjusted from 0° to 30° by the short shaft.

[0062] The position adjustment mechanism 22 includes a linear lead screw 222, a slider rail 224, a rotating handwheel 221, a micrometer adjustment assembly 225, and multiple intermediate connecting plates. The rotating handwheel 221 is bolted to the linear lead screw 222, which is connected to the first intermediate plate 223. Thus, by cooperating with the rotating handwheel 221 and the linear lead screw 222, rotational motion is converted into linear motion, driving the first intermediate plate 223 to move. This achieves the purpose of horizontally moving the welding torch assembly by rotating the handwheel. The second intermediate plate 226 is fixed to the first intermediate plate 223 by the micrometer adjustment assembly 225. By adjusting the micrometer adjustment assembly 225, the vertical displacement of the welding torch can be precisely adjusted.

[0063] The collector plate transport and transfer device includes a collector plate transport assembly 32 and a collector plate positioning and welding assembly 31. The collector plate positioning and welding assembly 31 includes a rotary motor 311 and a rotary fixture. The rotary motor fixes the collector plate rotating fixture via a coupling. The collector plate rotating fixture includes a fixture base plate 315, an intermediate fixed plate 314, a collector plate second positioning gripper 313, a telescopic cylinder 312, and a slider rail mechanism. The telescopic cylinder 312 is fixed on the fixture base plate 315, and the cylinder pusher is connected to the intermediate fixed plate 314. The intermediate fixed plate 314 and the fixture base plate 315 are connected by the slider rail mechanism. Two sets of collector plate second positioning grippers 313 are fixed on the intermediate fixed plate 314. The collector plate can be rotated from the horizontal direction to the vertical direction by the collector plate positioning and welding assembly, and the collector plate can be transported to the welding base plate by the telescopic cylinder.

[0064] The collector plate transport assembly 32 includes an electric slide table 321, a fixed base plate 322, an intermediate connecting plate 323, a fixed plate 324, and collector plate first positioning grippers 325. The fixed base plate 322 is fixed on the electric slide table 321, and the fixed plate 324 is fixed on the fixed plate 324 via the intermediate connecting plate 323. Two sets of collector plate first positioning grippers 325 are fixed on the fixed plate 324. The collector plate transport assembly can complete the loading and horizontal transport of the collector plate and transport the collector plate to the positioning welding assembly to complete the unloading and welding of the collector plate.

[0065] The specific embodiments of this utility model are as follows:

[0066] After the cylindrical core is inserted into the shell, it is transferred to the welding station on the production line. At the same time, the manifold loading robot picks up the manifold at the designated position using a vacuum suction cup and transports it to the first positioning gripper 325 of the manifold carrying component 32. At this time, the cylinder of the first positioning gripper 325 of the manifold is activated, and the first positioning gripper 325 of the manifold clamps the manifold. The manifold carrying component 32 moves to the corresponding position of the manifold positioning welding component 31 via the electric slide table 321. Next, the rotary motor 311 of the collector plate positioning welding assembly 31 starts working, moving the second positioning jaw 313 of the collector plate to the engagement position of the first positioning jaw 325 of the collector plate. At the same time, the first positioning jaw 325 of the collector plate is released, and the cylinder of the second positioning jaw 313 of the collector plate closes, clamping the collector plate. Then, the rotary motor 311 rotates the collector plate positioning welding assembly 31 to directly below the welding position. Then, the telescopic cylinder 312 moves to transport the collector plate to the front of the welding base plate 115 and fits it against the cylindrical core, thus completing the collector plate loading process. Finally, the laser gun head 24 begins the spot welding action under program control. The laser gun head 24 emits light at the hollowed-out position of the welding base plate 115 to complete the X-shaped welding trajectory. The small dust particles generated during the welding process are mostly sucked in by the first main chamber 111 due to the suction force. Larger dust particles with higher initial velocities enter the second main chamber 121 and are mostly sucked away. Some escaped particles are blocked by the air curtain formed by positive pressure and sucked away by negative pressure. The fumes generated during the welding process are sucked away by the first dust removal device 11. After welding is completed, each unit resets and waits for the next welding process.

[0067] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A dust removal device, characterized in that, The utility model relates to a dust removal equipment, welding device (2) and collection disc carrying flow transfer device (3) are provided, and the dust removal equipment comprises: First dust removal device (11) and second dust removal device (12) are fixedly connected with first dust removal device (11); First dust removal device (11) is equipped with first main cavity (111), and second dust removal device (12) is equipped with second main cavity (121) that is communicated with first main cavity (111) penetrates, so that first main cavity (111) and second main cavity (121) can be penetrated by light beam; A plurality of negative pressure suction ports are arranged in the first main cavity (111), and the negative pressure suction ports are connected to the first negative pressure pipeline; The second main cavity (121) is provided with a negative pressure outlet (123) and a positive pressure air knife outlet (124), the negative pressure outlet (123) is connected to the second negative pressure pipeline, and the positive pressure air knife outlet (124) is connected to the positive pressure pipeline.

2. The dust extraction apparatus of claim 1, wherein First negative pressure pipe (114) for connecting the first negative pressure pipeline is arranged on both sides of the first dust removal device (11) and communicated with the first main cavity (111); The negative pressure suction port comprises a first negative pressure suction port (112) and a second negative pressure suction port (113), the first negative pressure suction port (112) is located in front of the first negative pressure pipe (114), and the second negative pressure suction port (113) is located above the side of the first negative pressure pipe (114).

3. The dust extraction apparatus of claim 1, wherein The negative pressure suction port is a long slot type port with gradually changing diameter.

4. The dust extraction apparatus of claim 1, wherein A through hole is arranged above the positive pressure air knife outlet (124) to connect the workshop compressed air, second negative pressure pipe (122) for connecting the second negative pressure pipeline is arranged on both sides of the second dust removal device (12) and communicated with the second main cavity (121), and the positive pressure air knife outlet (124) is symmetrically arranged with the negative pressure outlet (123) as the symmetric center.

5. A current collector plate welding apparatus for cylindrical batteries, comprising: The dust removal equipment, welding device (2) and collection disc carrying flow transfer device (3) according to any one of claims 1-4; The welding device (2) is located behind the second dust removal device (12), and the welding laser beam emitted by the welding device (2) penetrates the first main cavity (111) of the first dust removal device (11) and the second main cavity (121) of the second dust removal device (12); The collection disc carrying flow transfer device (3) is located below the first dust removal device (11) and is used for carrying the collection disc to the welding position.

6. The current collector disc welding apparatus of the cylindrical battery according to claim 5, characterized by A welding bottom plate (115) is arranged in the first main cavity (111).

7. The current collector disc welding apparatus of the cylindrical battery according to claim 5, characterized by, The welding device (2) comprises a position adjusting mechanism (22) fixed on a welding stand (21), a support frame (23) fixed on the position adjusting mechanism (22) and a short shaft rotatably connected with the support frame (23), and the short shaft is used for adjusting the spatial position of the laser gun head.

8. The current collector disc welding apparatus of the cylindrical battery according to claim 7, characterized by, The position adjusting mechanism (22) comprises a linear lead screw (222), a sliding block sliding rail (224), a rotating hand wheel (221), a micrometer adjusting assembly (225) and a first intermediate plate (223); The rotating hand wheel (221) is connected with the linear lead screw (222) through bolts, the linear lead screw (222) is connected with the first intermediate plate (223), and a second intermediate plate (226) is fixed on the first intermediate plate (223) through the micrometer adjusting assembly (225).

9. The current collector plate welding apparatus for cylindrical batteries according to claim 5, wherein The current collector carrying and transferring device (3) comprises a current collector carrying assembly, the current collector carrying assembly comprising an electric sliding table (321), a connecting part and a first current collector positioning clamp (325); The connecting part is fixed on a sliding block of the electric sliding table (321), and the first current collector positioning clamp (325) is fixed on the upper end of the connecting part.

10. The current collector disc welding apparatus of the cylindrical battery according to claim 9, characterized by, The current collector carrying and transferring device (3) further comprises a current collector positioning and welding assembly cooperating with the current collector carrying and transferring device (3) to grasp the current collector, the current collector positioning and welding assembly comprising a rotary motor (311) and a rotary tool, and the rotary motor (311) is connected to the rotary tool through a shaft coupling; The rotary tool comprises a tool base plate (315), an intermediate fixed plate (314), a second current collector positioning clamp (313) and a telescopic cylinder (312); the telescopic cylinder (312) is fixed on the tool base plate (315), and the push head of the telescopic cylinder (312) is connected to the intermediate fixed plate (314); the intermediate fixed plate (314) is slidably connected to the tool base plate (315); a plurality of groups of the second current collector positioning clamp (313) are fixed on the intermediate fixed plate (314), and the second current collector positioning clamp (313) is used for grasping the current collector on the first current collector positioning clamp (325) from a target position.

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