Pole piece replacing device

Abstract

The utility model discloses a pole piece replacing device which comprises a pole piece box arranged in a pole piece box positioning assembly and a powder brushing and dust collecting assembly, and the powder brushing and dust collecting assembly comprises a front-end dust collecting pipe, two side-end dust collecting pipes and a rear-end dust collecting pipe; two lifting cylinders capable of lifting are arranged, the tops of the lifting cylinders are connected with a strip-shaped front sliding groove extending forwards, a through groove is formed in the strip-shaped front sliding groove, a front moving plate which is connected to the through groove in a screwed mode and connected with a front-end dust suction pipe is arranged on the strip-shaped front sliding groove, the front sliding groove is lifted through the cylinders, then the front-end dust suction pipe is lifted, and space is provided for overall replacement of the pole piece box; the pole piece box can be integrally replaced, so that the operation is more convenient, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a pole piece exchange device used for storing and taking pole pieces in a battery manufacturing process. Background Art

[0002] With the rapid rise of the new energy industry, especially the gradual popularization of new energy vehicles, the demand for safe and low-cost lithium-ion batteries is huge. In the manufacturing process of lithium-ion batteries, a stacking machine is usually used to stack the positive and negative electrodes at intervals to form a battery cell. In the commonly used lithium-ion battery cell stacking machine, the positive or negative electrode sheet is first sucked from the electrode box by a suction cup and transported to the corresponding positioning table. When the electrode sheet needs to be stacked, the suction cup is used again to suck the electrode sheet from the positioning table and transported to the stacking table to complete a stacking operation. The improvement in efficiency when replacing the electrode sheet can greatly improve the efficiency of the entire battery production. Utility Model Content

[0003] The utility model provides a pole piece replacement device, which saves time by replacing the pole piece box as a whole.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a pole piece changing device, including a pole piece box positioning assembly, a powder brushing and dust suction assembly is installed on the pole piece box positioning assembly, a lifting assembly is provided under the pole piece box positioning assembly, a pole piece box installed in the pole piece box positioning assembly, and a quick pressing assembly for pressing the pole piece box, the pole piece box positioning assembly includes a base fixed on the back of the stacking machine frame, the top surface of the base is a square plate, and a rectangular columnar support frame is vertically fixed on each of the left and right sides of the top surface of the base, and the top of the support frame is connected to a square ring-shaped powder brushing and dust suction assembly, and the powder brushing and dust suction assembly includes a front dust suction pipe, two side dust suction pipes and a rear dust suction pipe; a lifting cylinder that can be raised and lowered is respectively provided in the middle of the outer side walls of the two support frames, and the top of the lifting cylinder is connected to a front slide groove in the shape of a strip extending forward, and a through groove is provided on it; a front movable plate connected to the front dust suction pipe is provided, and the two ends of the front movable plate are screwed into the through groove on the front slide groove.

[0005] The utility model provides two side dust suction pipes that are fixed on the inner side wall of the top end of the support frame, the inner side wall of the side dust suction pipe is provided with a dust suction port, a plate-shaped side movable plate is provided in the middle of the top surface of the side dust suction pipe, the end of the side movable plate close to the pole piece box is connected to a horizontal strip-shaped side brush made of aluminum alloy, the side movable plate is provided with two sliding grooves extending inward and outward directions, and two locking screws are provided to pass through the sliding grooves of the side movable plate and are screwed to the top surface of the side dust suction pipe.

[0006] The utility model provides a rear brush on one side of the rear dust suction pipe close to the pole piece box 4; a dust suction pipe rear slide groove which is L-shaped as a whole is provided on the rear side walls of the two support frames close to the side dust suction pipe, the vertical side of the L-shape is connected to the rear side walls of the support frames, the horizontal side of the L-shape is on the top and is provided with a through groove extending backward; a horizontal strip-shaped rear movable plate is provided, the rear dust suction pipe is fixed on the rear movable plate, and screws are provided at both ends of the rear movable plate to be screwed in the rear slide groove of the dust suction pipe.

[0007] The pole piece box of the utility model includes a bottom plate assembly as a bottom plate; the bottom plate assembly includes a plate-shaped bottom plate, a square lifting through hole is opened in the middle of the bottom plate, two small square-shaped, magnetic support plate positioning support members are erected on the front and rear edges of the bottom plate near the lifting through hole, a plate-shaped pole piece support plate for lifting the pole piece is provided, and the bottom surface fixed position of the pole piece support plate can be magnetically attracted to the support plate positioning support member; the lifting assembly is located under the base, and includes a push rod located below the lifting through hole and a lifting power device for lifting the push rod.

[0008] The pole piece box of the utility model comprises a left width adjustable component standing on the left side of the bottom plate component for positioning the left side frame of the pole piece box, a right width adjustable component standing on the right side of the bottom plate component for positioning the right side frame of the pole piece box, and a length adjustable component standing on the rear side of the bottom plate component for positioning the rear side frame of the pole piece box; the left width adjustable component comprises a left positioning slide plate connected to the left part of the top surface of the bottom plate, a plate-shaped left slide groove adapted to the left positioning slide plate, a convex trapezoidal slide rail extending along the inner and outer directions of the bottom plate is provided on the top surface of the left positioning slide plate, a concave trapezoidal groove is provided on the bottom surface of the left slide groove, which is adapted to the left positioning slide plate and slidably engaged, and the top surface of the left slide groove is connected to a vertical plate-shaped left baffle; the right width adjustable component comprises A right positioning rail plate connected to the right part of the top surface of the base plate, a plate-shaped right slide groove adapted to the right positioning rail plate, a raised top surface of the right positioning rail plate provided with a trapezoidal slide rail extending along the inner and outer directions of the base plate, a recessed trapezoidal groove provided on the bottom surface of the right slide groove adapted to and slidably engaged with the right positioning rail plate, and a top surface of the right slide groove connected to a vertical plate-shaped right baffle; the length-adjustable component includes a rear positioning rail plate connected to the rear part of the top surface of the base plate, a plate-shaped rear slide groove adapted to the rear positioning rail plate, a raised top surface of the rear positioning rail plate provided with a trapezoidal slide rail extending along the inner and outer directions of the base plate, a recessed trapezoidal groove provided on the bottom surface of the rear slide groove adapted to and slidably engaged with the rear positioning rail plate, and a top surface of the rear slide groove connected to a vertical plate-shaped rear baffle.

[0009] The outer surface of the left baffle of the utility model is in close contact with a left front baffle with an L-shaped plate-like horizontal cross-section, the vertical side of the L-shape is connected together with the left baffle part, the horizontal side of the L-shape is bent inward at the front end, and two horizontal transverse grooves parallel to each other are provided on the left front baffle, and each corresponding horizontal transverse groove on the left baffle has a screw passing through the horizontal transverse groove and tightened; the outer surface of the right baffle is in close contact with a right front baffle with an L-shaped plate-like horizontal cross-section, the vertical side of the L-shape is connected together with the right baffle part, the horizontal side of the L-shape is bent inward at the front end, and two horizontal transverse grooves parallel to each other are provided on the right front baffle, and each corresponding horizontal transverse groove on the right baffle has a screw passing through the horizontal transverse groove and tightened.

[0010] The utility model has two quick pressing assemblies which are respectively fixed on both sides of the front end of the pole piece box positioning assembly. The quick pressing assemblies include a wrench and a quick clamp driven by the wrench. The quick clamp can be pressed tightly on the bottom plate.

[0011] The utility model comprises a front dust suction pipe, two side dust suction pipes and a rear dust suction pipe, and the four dust suction pipes are all connected to the dust suction mechanism. A brush is arranged on one side of the dust suction pipe close to the pole piece box. The brush is an aluminum alloy brush.

[0012] The pole piece supporting plate of the utility model is replaceable.

[0013] Compared with the prior art, the pole piece replacement device of the utility model includes a front dust suction tube that can be lifted, which provides space for replacing the pole piece box as a whole; and the pole piece box as a whole can be adjusted according to the size of the pole piece to be operated, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the pole piece replacement device.

[0015] Figure 2 It is a schematic diagram of the pole piece box structure.

[0016] Figure 3 It is a schematic diagram of the structure of the pole piece box bottom plate assembly.

[0017] Figure 4 Schematic diagram of the bottom structure of the pole piece box. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0019] like Figures 1 to 4 As shown, the pole piece replacement device of the utility model is fixed on the frame of the battery winding machine and is used to place pole pieces for making batteries. During the manufacturing process, the pole pieces are taken out from the pole piece replacement device one by one.

[0020] The pole piece replacement device includes a pole piece box positioning component 1, on which a powder brushing and dust suction component 2 is installed, a lifting component 3 is provided below the pole piece box positioning component 1, a pole piece box 4 installed in the pole piece box positioning component 1, and a quick pressing component 5 for pressing the pole piece box 4.

[0021] The pole piece box positioning assembly 1 is fixed on the frame of the winding machine, and a stack of pole pieces are installed in the pole piece box 4. After the pole piece box 4 is installed in the pole piece box positioning assembly 1, it is fixed in the pole piece box positioning assembly 1 by the quick pressing assembly 5 and does not move; in the process of making batteries, the lifting assembly 3 lifts all the pole pieces in the pole piece box 4 to the top of the pole piece box positioning assembly 1 from bottom to top, so that they can be taken away one by one; the pole pieces used to make batteries need to be dust-free, and the powder brushing and dust suction assembly 2 is installed on the top of the pole piece box positioning assembly 1 and is connected to the dust suction mechanism, so that the pole pieces to be taken away can be first cleaned of surface dust by the powder brushing and dust suction assembly 2.

[0022] The pole piece box positioning assembly 1 includes a base 11 whose back is fixed on the frame of the winding machine. The top surface of the base 11 is a square plate. A rectangular columnar support frame 12 is vertically fixed on the left and right sides of the top surface of the base 11. The top of the support frame 12 is connected to a square ring-shaped powder brushing and dust collection assembly 2.

[0023] The powder brushing and dust collection assembly 2 includes a front dust collection pipe 21, two side dust collection pipes 22 and a rear dust collection pipe 23. The four dust collection pipes form a quadrilateral frame to enclose the pole piece in the pole piece box 4. The four dust collection pipes are all rectangular tube-shaped. The four dust collection pipes are connected to the dust collection mechanism, and a brush is provided on one side of the dust collection pipe close to the pole piece box 4. When the pole piece is taken away, it passes through the brush, and the powder brushed off is sucked away by the dust collection pipe. The brush is an aluminum alloy brush.

[0024] In order to match different types of pole pieces, the front dust suction pipe 21 and the rear dust suction pipe 23 of the powder brush dust suction assembly 2 can be adjusted forward and backward, and the side brush 221 in front of the side dust suction pipe 22 can be adjusted left and right.

[0025] The two side dust suction pipes 22 are fixed on the inner wall of the top end of the support frame 12, and a dust suction port is opened on the inner wall of the side dust suction pipe 22. A plate-shaped side movable plate 222 is provided in the middle of the top surface of the side dust suction pipe 22. The end of the side movable plate 222 close to the inner side is connected to a horizontal strip-shaped side brush 221 made of aluminum alloy. The side movable plate 222 has two sliding grooves extending along the inside and outside directions of the pole piece box 4. Two locking screws are provided to pass through the sliding grooves of the side movable plate 222 and are screwed to the top surface of the side dust suction pipe 22. Loosening the screws can adjust the position of the side movable plate 222 along the direction of the sliding groove, and then the side brush 221 can adjust its position according to the size of the pole piece.

[0026] A rear brush 232 is provided on one side of the rear end dust suction pipe 23 close to the pole piece box 4, and the position of the rear end dust suction pipe 23 can be adjusted forward and backward according to the size of the pole piece; a rear slide groove 231 of the dust suction pipe which is L-shaped as a whole is provided on the rear side walls of the two support frames 12, and the vertical side of the L-shape is connected to the rear side walls of the support frames 12, and the horizontal side of the L-shape is on the top and is provided with a through groove extending backward; a horizontal strip-shaped rear movable plate 233 is provided, and the rear end dust suction pipe 23 is fixed on the lower surface of the rear movable plate 233, and screws are provided at both ends of the rear movable plate 233, which are just inserted into the through groove of the rear slide groove 231 of the dust suction pipe, and the position of the movable screw in the rear slide groove 231 of the dust suction pipe can adjust the position of the rear end dust suction pipe 23.

[0027] A front brush 214 is provided on one side of the front dust suction tube 21 close to the pole piece box 4. The front dust suction tube 21 can be adjusted forward and backward and can also be raised. After being raised, the front end position is released to facilitate pulling the pole piece box 4 out of the pole piece box positioning assembly 1 as a whole.

[0028] A lifting cylinder 212 is respectively provided in the middle part of the outer wall of the two support frames 12. The top of the lifting cylinder 212 is connected to a front slide groove 213 extending forward in a strip shape and having a through groove thereon. A front movable plate 211 is provided, the bottom of which is connected to the front dust suction pipe 21. Screws are provided at both ends of the front movable plate 211 and are screwed into the through groove on the front slide groove 213. The middle part of the front movable plate 211 protrudes upward to adapt to the height of the front dust suction pipe 21, and the bottom of the protruding part is just connected to the front dust suction pipe 21.

[0029] When the lifting cylinder 212 is controlled to be lifted, the front slide grooves 213 on both sides are lifted, and the front movable plate 211 connected to the front slide grooves 213 is lifted at the same time, thereby driving the front dust suction pipe 21 to be lifted, so that the front end space of the pole piece box positioning assembly 1 is opened, so that the pole piece box 4 can be pulled out or pushed in as a whole.

[0030] The screws at both ends of the front movable plate 211 can move on the front sliding groove 213 to adjust the position of the front dust suction pipe 21 according to the size of the pole piece.

[0031] The pole piece box 4 includes a bottom plate assembly 41 as a bottom plate, a left width adjustable assembly 42 standing on the left side of the bottom plate assembly 41, a right width adjustable assembly 43 standing on the right side of the bottom plate assembly 41 and a length adjustable assembly 44 standing on the rear side of the bottom plate assembly 41.

[0032] The bottom plate assembly 41 includes a plate-shaped bottom plate 411, and a square through hole is opened in the middle of the bottom plate 411, which is for facilitating the passage of the lifting assembly 3 through the lifting through hole 415. Two small square-shaped pallet positioning supports 414 are erected on the bottom plate 411 near the front and rear edges of the lifting through hole 415. The pallet positioning supports 414 are magnetic and are provided with a plate-shaped pole piece pallet 413 for lifting the pole piece. The bottom fixed position of the pole piece pallet 413 can be magnetically attracted to the pallet positioning supports 414 for easy positioning. The pole piece pallet 413 can be replaced according to the size of the electrode piece; handles 412 are provided on the front side and left and right sides of the bottom plate 411 for convenient pulling out of the pole piece box 4 as a whole for picking up and carrying.

[0033] The left width adjustable component 42 is used to position the frame on the left side of the pole piece box 4, including a left positioning slide plate 421 connected to the left part of the top surface of the bottom plate 411, a left slide groove 422 adapted to the left positioning slide plate 421, a protrusion on the top surface of the left positioning slide plate 421 is provided with a trapezoidal slide extending inward and outward directions of the bottom plate 411, and a concave trapezoidal groove is provided on the bottom surface of the left slide groove 422 to adapt to and slide and engage with the left positioning slide plate 421, and the top surface of the left slide groove 422 is connected to the vertical plate-shaped left baffle 423, and the outer surface of the left baffle 423 is closely attached to the left front baffle 424 with a plate-shaped horizontal cross-section of L shape; the left slide groove 422 slides on the left positioning slide plate 421, thereby driving the left baffle 423 and the left front baffle 424 to slide inward and outward to adjust and adapt to pole pieces of different sizes.

[0034] A left front baffle plate 424 having an L-shaped horizontal cross section is provided, wherein the vertical side of the L-shape is connected to and overlaps with the left baffle plate 423, and the horizontal side of the L-shape is bent inward at the front end. Two horizontal transverse grooves parallel to each other are provided on the left front baffle plate 424, and each corresponding horizontal transverse groove on the left baffle plate 423 has a screw. By pulling the left front baffle plate 424 so that the screws are tightened at different positions of the horizontal transverse grooves, the position of the L-shaped transverse side of the left front baffle plate 424 can be adjusted to accommodate pole pieces of different sizes.

[0035] The right width adjustable component 43 is used to position the frame on the right side of the pole piece box 4, including a right positioning slide plate 431 connected to the right part of the top surface of the bottom plate 411, a plate-shaped right slide groove 432 adapted to the right positioning slide plate 431, a raised top surface of the right positioning slide plate 431 is provided with a trapezoidal slide rail extending along the inward and outward directions of the bottom plate 411, a recessed trapezoidal groove is provided on the bottom surface of the right slide groove 432, which is adapted to and slidably engaged with the right positioning slide plate 431, and the top surface of the right slide groove 432 is connected to a vertical plate-shaped right baffle 433; the outer surface of the right baffle 433 is tightly attached to a right front baffle 434 with a plate-shaped horizontal cross-section of an L-shape; the right slide groove 432 slides on the right positioning slide plate 431, thereby driving the right baffle 433 and the right front baffle 434 to slide inward and outward, so as to adjust and adapt to pole pieces of different sizes.

[0036] A right front baffle plate 434 with an L-shaped horizontal cross-section is provided, wherein the vertical side of the L-shape is connected to and overlaps with the right baffle plate 433, and the horizontal side of the L-shape is bent inward at the front end. Two horizontal transverse grooves parallel to each other are provided on the right front baffle plate 434, and each corresponding horizontal transverse groove on the right baffle plate 433 has a screw. By pulling the right front baffle plate 434 so that the screws are tightened at different positions of the horizontal transverse grooves, the position of the L-shaped transverse side of the right front baffle plate 434 can be adjusted to accommodate pole pieces of different sizes.

[0037] The length-adjustable component 44 is used to position the frame on the rear side of the pole piece box 4, including a rear positioning slide plate 441 connected to the rear part of the top surface of the bottom plate 411, a rear slide groove 442 adapted to the rear positioning slide plate 441, and a rear baffle 443 in the shape of an upright plate connected to the top surface of the rear slide groove 442.

[0038] The top surface of the rear positioning slide plate 441 is raised with a trapezoidal slide rail extending inward and outward from the bottom plate 411, and the bottom surface of the rear slide groove 442 is provided with a concave trapezoidal groove that is adapted to and slidably engaged with the rear positioning slide plate 441. The rear slide groove 442 slides on the rear positioning slide plate 441, thereby driving the rear baffle plate 443 to slide inward and outward, and is adjusted to adapt to pole pieces of different sizes.

[0039] Two quick pressing assemblies 5 are respectively fixed on both sides of the front end of the pole piece box positioning assembly 1. When the pole piece box 4 is placed in the pole piece box positioning assembly 1, the quick pressing assembly 5 presses the bottom plate 411 of the pole piece box 4 on the base 11 to fix the pole piece box 4. The quick pressing assembly 5 includes a wrench 51 and a quick clamp 52 driven by the wrench 51. After the wrench 51 is lifted, the quick clamp 52 falls down to clamp, and after the wrench 51 is pressed, the quick clamp 52 lifts up to release the bottom plate 411 of the pole piece box 4.

[0040] The lifting assembly 3 is located below the base 11, and includes a push rod 31 and a lifting power device 32 for lifting the push rod 31. The push rod 31 rises through the lifting through hole 415 to lift the pole piece support plate 413; the lifting power device 32 can be driven by a motor.

[0041] Overall process: After the pole pieces to be used are installed in the pole piece box 4, install the pole piece box 4 into the pole piece box positioning assembly 1, and then use the quick pressing assembly 5 to press the pole piece box 4. After the machine is working, turn on the powder brushing and dust suction assembly 2, and the push rod 31 of the lifting assembly 3 rises to lift the pole piece support plate 413. The pole pieces on the top are taken away one by one, and at the same time, they are brushed and dusted by the powder brushing and dust suction assembly 2. The pole piece box 4 can be replaced as a whole, which is more convenient to operate and improves work efficiency.

Claims

1. A pole piece replacement device, comprising a pole piece box positioning assembly (1), a powder brushing and dust collecting assembly (2) mounted on the pole piece box positioning assembly (1), a lifting assembly (3) disposed below the pole piece box positioning assembly (1), a pole piece box (4) installed in the pole piece box positioning assembly (1), and a quick pressing assembly (5) for pressing the pole piece box (4), the pole piece box positioning assembly (1) comprising a base (11) whose back is fixed on a winding machine frame, the top surface of the base (11) being in the shape of a square plate, a rectangular columnar support frame (12) being vertically fixed on each of the left and right sides of the top surface of the base (11), the top of the support frame (12) being connected to the square ring-shaped powder brushing and dust collecting assembly (2), characterized in that: The powder brush dust suction assembly (2) comprises a front dust suction pipe (21), two side dust suction pipes (22) and a rear dust suction pipe (23); a lift cylinder (212) is provided in the middle of the outer side walls of the two support frames (12), the top of the lift cylinder (212) is connected to a strip-shaped front slide groove (213) extending forward, and a through groove is provided on the strip-shaped front slide groove (213); a front movable plate (211) connected to the front dust suction pipe (21) is provided, and both ends of the front movable plate (211) are screwed into the through groove on the front slide groove (213).

2. The pole piece replacement device according to claim 1, characterized in that: Two side dust suction pipes (22) are fixed on the inner side wall of the top end of the support frame (12); a dust suction port is opened on the inner side wall of the side dust suction pipe (22); a plate-shaped side movable plate (222) is provided in the middle of the top surface of the side dust suction pipe (22); the end of the side movable plate (222) close to the pole piece box (4) is connected to a side brush (221) made of a horizontal strip of aluminum alloy; the side movable plate (222) has two sliding grooves extending inward and outward directions; two locking screws are provided and pass through the sliding grooves of the side movable plate (222) and are screwed to the top surface of the side dust suction pipe (22).

3. The pole piece replacement device according to claim 1, characterized in that: A rear brush (232) is provided on one side of the rear dust suction pipe (23) close to the pole piece box (4); a dust suction pipe rear slide groove (231) which is L-shaped as a whole is provided on the rear side walls of the two support frames (12) close to the side dust suction pipe (22); the vertical side of the L-shape is connected to the rear side wall of the support frame (12); the horizontal side of the L-shape is on the top and is provided with a through groove extending backward; a horizontal strip-shaped rear movable plate (233) is provided, the rear dust suction pipe (23) is fixed on the rear movable plate (233), and screws are provided at both ends of the rear movable plate (233) and are screwed into the dust suction pipe rear slide groove (231).

4. The pole piece replacement device according to claim 1, characterized in that: The pole piece box (4) comprises a bottom plate assembly (41) serving as a bottom plate; the bottom plate assembly (41) comprises a plate-shaped bottom plate (411), a square top-lifting through hole (415) being provided in the middle of the bottom plate (411), two small square-shaped magnetic support plate positioning supports (414) being erected on the bottom plate (411) near the front and rear edges of the top-lifting through hole (415), a plate-shaped pole piece support plate (413) for supporting the pole piece being provided, and a bottom fixed position of the pole piece support plate (413) being magnetically attracted to the support plate positioning supports (414); The lifting assembly (3) is located below the base (11), and comprises a push rod (31) located below the lifting through hole (415) and a lifting power device (32) for lifting the push rod (31).

5. The pole piece replacement device according to claim 4, characterized in that: The pole piece box (4) comprises a left width adjustable component (42) standing on the left side of the bottom plate component (41) for positioning the left side frame of the pole piece box (4), a right width adjustable component (43) standing on the right side of the bottom plate component (41) for positioning the right side frame of the pole piece box (4), and a length adjustable component (44) standing on the rear side of the bottom plate component (41) for positioning the rear side frame of the pole piece box (4); The left width adjustable component (42) comprises a left positioning rail plate (421) connected to the left portion of the top surface of the bottom plate (411), a plate-shaped left slide groove (422) adapted to the left positioning rail plate (421), a protruding trapezoidal slide rail extending along the inside and outside directions of the bottom plate (411) on the top surface of the left positioning rail plate (421), a concave trapezoidal groove adapted to the left positioning rail plate (421) and slidably engaged on the bottom surface of the left slide groove (422), and a vertical plate-shaped left baffle (423) connected to the top surface of the left slide groove (422); The right width adjustable component (43) comprises a right positioning rail plate (431) connected to the right part of the top surface of the bottom plate (411), a plate-shaped right slide groove (432) adapted to the right positioning rail plate (431), a raised trapezoidal slide rail extending along the inner and outer directions of the bottom plate (411) on the top surface of the right positioning rail plate (431), a recessed trapezoidal groove adapted to the right positioning rail plate (431) and slidably engaged on the bottom surface of the right slide groove (432), and a vertical plate-shaped right baffle (433) connected to the top surface of the right slide groove (432); The length-adjustable component (44) comprises a rear positioning rail plate (441) connected to the rear portion of the top surface of the bottom plate (411), a plate-shaped rear slide groove (442) adapted to the rear positioning rail plate (441), a raised trapezoidal slide rail extending in the inner and outer directions of the bottom plate (411) on the top surface of the rear positioning rail plate (441), a recessed trapezoidal groove adapted to the rear positioning rail plate (441) and slidably engaged on the bottom surface of the rear slide groove (442), and a vertical plate-shaped rear baffle (443) connected to the top surface of the rear slide groove (442).

6. The pole piece replacement device according to claim 5, characterized in that: The outer surface of the left baffle (423) is closely attached to a left front baffle (424) having a plate-like horizontal cross section of an L-shape, the vertical side of the L-shape overlaps with the left baffle (423) and is connected together, the horizontal side of the L-shape is bent inward at the front end, and two horizontal transverse grooves parallel to each other are provided on the left front baffle (424), and each corresponding horizontal transverse groove on the left baffle (423) has a screw passing through the horizontal transverse groove and then tightened; The outer surface of the right baffle (433) is closely attached to a right front baffle (434) having a plate-like horizontal cross section of an L-shape, the vertical side of the L-shape is partially overlapped and connected with the right baffle (433), the horizontal side of the L-shape is bent inward at the front end, and two horizontal transverse grooves parallel to each other are provided on the right front baffle (434), and each corresponding horizontal transverse groove on the right baffle (433) has a screw passing through the horizontal transverse groove and then tightened.

7. The pole piece replacement device according to claim 1, characterized in that: There are two quick-pressing assemblies (5), which are respectively fixed on both sides of the front end of the pole piece box positioning assembly (1). The quick-pressing assemblies (5) include a wrench (51) and a quick clamp (52) driven by the wrench (51). The quick clamp (52) can be pressed tightly onto the bottom plate (411).

8. The pole piece replacement device according to claim 1, characterized in that: The front dust suction pipe (21), two side dust suction pipes (22) and a rear dust suction pipe (23) are all connected to the dust suction mechanism, and a brush is provided on one side of the dust suction pipe close to the pole piece box (4); the brush is an aluminum alloy brush.

9. The pole piece replacement device according to claim 4, characterized in that: The pole piece support plate (413) is replaceable.

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