Dust removal and rubberizing device for positive electrode of nickel-metal hydride battery

Abstract

The utility model discloses a dust-removing and rubberizing device for a positive electrode of a nickel-metal hydride battery, which relates to the field of nickel-metal hydride battery equipment and comprises a base, limiting guide components are fixedly mounted at the front and rear parts of the upper end of the base, a dust-removing component is fixedly mounted at the front part of the upper end of the base, and a rubberizing and flattening component is fixedly mounted at the rear part of the upper end of the base. According to the dust removal and rubberizing device for the positive electrode of the nickel-metal hydride battery, disclosed by the utility model, the unfolded positive electrode plate can be unwound, guided and wound through the limiting and guiding assembly, so that subsequent treatment on the positive electrode plate is facilitated. Dust on the surface of the positive plate can be repeatedly blown away through the dust removal assembly, the dust removal range is expanded, and dust remaining is avoided. The surface of the positive plate can be uniformly glued through the gluing and flattening assembly, and the glued surface and the surface of the positive plate are flattened after gluing, so that the phenomenon that bubbles or wrinkles are generated on the contact surface of the glued surface and the surface of the positive plate can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the field of nickel-hydrogen battery equipment, in particular to a nickel-hydrogen battery positive electrode dust removal and glue sticking device. Background Art

[0002] Nickel-metal hydride battery is a good performance battery. Nickel-metal hydride battery is divided into high-voltage nickel-metal hydride battery and low-voltage nickel-metal hydride battery. The positive active material of nickel-metal hydride battery is Ni(OH)2, and the negative active material is metal hydride. The positive electrode of nickel-metal hydride battery can be unfolded and pasted with film according to actual needs, or directly pasted with film.

[0003] Chinese patent document CN217263750U discloses a dust removal and gluing device for the positive electrode sheet of a nickel-hydrogen battery. The device is provided with a fixing groove, a limiting groove and an adjusting hole, etc., and a tape is placed on a tape rod. The tape will be in the fixing groove to prevent the tape from detaching from the tape rod when rotating. The tape will pass under the limiting rod and will be located in the limiting groove to prevent the tape position from moving significantly. A first motor drives a roller brush to rotate, and the roller brush cleans the dust on the surface of the nickel-hydrogen battery.

[0004] The existing technology has the following problems: the dust removal effect of the above-mentioned glue sticking device is single and limited. In addition, the positive electrode of the nickel-hydrogen battery is not treated after glue sticking, and bubbles are easily generated on its surface. At the same time, after each glue sticking, one end of the film needs to be manually fixed on the recovery rod, which is cumbersome and impractical. Utility Model Content

[0005] The utility model provides a nickel-hydrogen battery positive electrode dust removal and glue sticking device to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A nickel-hydrogen battery positive electrode dust removal and gluing device comprises a base, wherein a limiting guide assembly is fixedly installed at the front and rear upper ends of the base, a dust removal assembly is fixedly installed at the front upper end of the base, and a gluing and flattening assembly is fixedly installed at the rear upper end of the base, wherein the dust removal assembly and the gluing and flattening assembly are located between the limiting guide assembly.

[0008] Preferably, the limiting guide assembly includes an electric unwinding roller and an electric winding roller, the left and right ends of the electric unwinding roller are rotatably connected to the left and right positions of the front upper end of the base, and the left and right ends of the electric winding roller are rotatably connected to the left and right positions of the rear upper end of the base.

[0009] Preferably, the dust removal assembly includes a mounting frame, the lower end of the mounting frame is fixedly mounted at the left and right positions of the front upper end of the base, the mounting frame is located behind the electric unwinding roller, a mounting plate is fixedly mounted on the left upper end of the mounting frame, a motor is fixedly mounted on the rear side of the mounting plate, the front part of the outer wall of the output end of the motor passes through the rear part of the mounting plate and is fixedly sleeved with a disc, and a limiting rod is fixedly mounted at the front edge of the disc.

[0010] Preferably, the outer wall of the limit rod is slidably connected to a movable sleeve, a movable rod is fixedly installed on the right side of the movable sleeve, fixed blocks are fixedly installed on the left and right parts of the upper end of the mounting frame, and the outer wall of the movable rod is slidably connected to the inner walls of the two fixed blocks.

[0011] Preferably, an air intake frame is fixedly installed on the rear part of the upper end of the mounting frame, a blower is fixedly installed on the inner wall of the air intake frame, an air supply hose is fixedly installed on the lower end of the air intake frame, a blowing pipe is fixedly installed on the end of the air supply hose away from the air intake frame, a movable groove is opened in the middle part of the upper end of the mounting frame, the left and right ends of the outer wall of the blowing pipe are fixedly connected to the bottom of the outer wall of the moving rod, a plurality of dust removal heads arranged linearly are fixedly installed on the bottom of the outer wall of the blowing pipe, and the front and rear ends of the mounting frame are rotatably connected to limiting rollers.

[0012] Preferably, the glue flattening assembly includes a support frame, the left and right parts of the upper end of the support frame are rotatably connected with an adjusting screw, the outer wall of the adjusting screw is threadedly connected with a moving block, a slide groove is opened in the middle part of the upper end of the support frame, a connecting plate is fixedly installed at the lower end of the moving block, the front and rear sides of the bottom of the connecting plate are slidably connected with the inner wall of the slide groove, a cylinder is fixedly installed at the lower end of the connecting plate, a U-shaped frame is fixedly installed at the lower end of the cylinder, an electric clamp is fixedly installed on the right side of the U-shaped frame, and a support roller is rotatably connected to the rear part of the upper end of the base, and the support roller is located directly below the support frame.

[0013] Preferably, a tape unwinding mechanism is movably connected to the top right side of the support frame, a through slot is provided on the top right side of the support frame, and an electric cutting mechanism is fixedly installed on the right position of the top inner wall of the support frame.

[0014] Preferably, the left parts of the front and rear sides of the U-shaped frame are rotatably connected with adjusting rods, and the bottoms of the opposite sides of the two adjusting rods are rotatably connected with pressure rollers. Storage grooves are opened at the bottom positions of the left parts of the front and rear sides of the U-shaped frame, and the inner walls of the two storage grooves are fixedly installed with sliding rods, and the outer walls of the two sliding rods are slidably connected with sliders. The ends of the two adjusting rods away from the pressure rollers are rotatably connected to the sides of the two sliders away from each other, and the right parts of the outer walls of the two sliding rods are movably sleeved with buffer springs, and the right ends of the two buffer springs are fixedly connected to the right parts of the inner walls of the two storage grooves, and the left ends of the two buffer springs are fixedly connected to the right sides of the two sliders.

[0015] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0016] The utility model provides a nickel-hydrogen battery positive electrode dust removal and gluing device, which can remove dust from the surface of the positive electrode sheet before gluing the positive electrode sheet through the cooperation among a motor, a disc, a limit rod, a movable sleeve, a movable rod, a fixed plate, an air intake frame, a blower, an air blowing pipe and a dust removal head. At the same time, a plurality of dust removal heads expand the dust removal range of the positive electrode sheet and improve the subsequent gluing quality of the positive electrode sheet.

[0017] The utility model provides a nickel-hydrogen battery positive electrode dust removal and gluing device, which can flatten the glued surface of the positive electrode sheet after gluing the positive electrode sheet by adjusting the cooperation among the screw rod, the moving block, the connecting plate, the cylinder, the U-shaped frame, the adjusting rod, the pressing roller, the sliding rod, the sliding block and the buffer spring, so as to prevent the gap between the positive electrode sheet and the contact surface of the tape. At the same time, when the pressing roller rolls and flattens, it is not necessary to adjust the height of the pressing roller from the positive electrode sheet, and the two buffer springs can reduce the pressure of the pressing roller on the positive electrode sheet, thereby improving the gluing quality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall front structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the overall rear view structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the dust removal component of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the dust removal component of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the glue-coating and flattening assembly of the utility model (I);

[0023] Figure 6 This is a schematic diagram of the structure of the glue-coating and flattening component of the utility model (II);

[0024] Figure 7 This is a schematic diagram of the structure of the glue flattening component of the utility model (III).

[0025] In the figure: 1. base; 2. limit guide assembly; 3. dust removal assembly; 4. glue coating and flattening assembly; 21. electric unwinding roller; 22. electric winding roller; 31. mounting frame; 32. mounting plate; 33. motor; 34. disc; 35. limit rod; 36. movable sleeve; 37. movable rod; 38. fixed block; 39. air intake frame; 310. blower; 311. air blowing pipe; 312. dust removal head; 41. support frame; 42. adjusting screw; 43. movable block; 44. slide; 45. connecting plate; 46. cylinder; 47. U-shaped frame; 48. electric clamp; 49. tape unwinding mechanism; 410. electric cutting mechanism; 411. adjusting rod; 412. pressure roller; 413. slide rod; 414. slide block; 415. buffer spring. DETAILED DESCRIPTION

[0026] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0027] like Figure 1 As shown, a nickel-hydrogen battery positive electrode dust removal and gluing device includes a base 1, a limiting guide component 2 is fixedly installed on the front and rear upper ends of the base 1, a dust removal component 3 is fixedly installed on the front upper end of the base 1, and a gluing and flattening component 4 is fixedly installed on the rear upper end of the base 1. The dust removal component 3 and the gluing and flattening component 4 are located between the limiting guide component 2.

[0028] The limit guide component 2 can be used to unwind, guide and rewind the unfolded positive electrode sheet, which is convenient for subsequent processing of the positive electrode sheet. The dust on the surface of the positive electrode sheet can be repeatedly blown away by the dust removal component 3, which expands the scope of dust removal and avoids dust residue. The glue-coating and flattening component 4 can be used to evenly coat the surface of the positive electrode sheet with glue, and the glue-coating surface and the surface of the positive electrode sheet can be flattened after coating, which can effectively prevent bubbles or wrinkles from forming on the contact surface between the two.

[0029] like Figure 2 As shown, the limiting guide assembly 2 includes an electric unwinding roller 21 and an electric winding roller 22. The left and right ends of the electric unwinding roller 21 are rotatably connected to the left and right positions of the front upper end of the base 1, and the left and right ends of the electric winding roller 22 are rotatably connected to the left and right positions of the rear upper end of the base 1.

[0030] The electric unwinding roller 21 can unwind the coiled material after the positive electrode sheet is unrolled, and the electric winding roller 22 can wind up the processed material. The electric unwinding roller 21 and the electric winding roller 22 have the same structure, both of which are composed of a roller and a driving motor. The driving motor drives the roller to rotate. When the two rollers are working, the corresponding driving motors have the same speed but opposite rotation directions. At the same time, the coils on the two rollers can be disassembled when processed.

[0031] like Figure 3and Figure 4 As shown, the dust removal assembly 3 includes a mounting frame 31, the lower end of the mounting frame 31 is fixedly installed at the left and right positions of the upper front end of the base 1, the mounting frame 31 is located behind the electric unwinding roller 21, a mounting plate 32 is fixedly installed on the left upper end of the mounting frame 31, a motor 33 is fixedly installed on the rear side of the mounting plate 32, the front part of the outer wall of the output end of the motor 33 passes through the rear part of the mounting plate 32 and is fixedly sleeved with a disc 34, and a limiting rod 35 is fixedly installed at the front edge of the disc 34.

[0032] The output end of the motor 33 drives the disc 34 to rotate, and the disc 34 drives the limiting rod 35 to rotate.

[0033] like Figure 4 As shown, the outer wall of the limit rod 35 is slidably connected to a movable sleeve 36, a movable rod 37 is fixedly installed on the right side of the movable sleeve 36, and fixed blocks 38 are fixedly installed on the left and right parts of the upper end of the mounting frame 31, and the outer wall of the movable rod 37 is slidably connected to the inner walls of the two fixed blocks 38.

[0034] When the limiting rod 35 rotates, the moving sleeve 36 slides on the limiting rod 35 and is limited by the moving action of the moving rod 37, so that the moving sleeve 36 moves up and down reciprocatingly on the limiting rod 35, and the moving rod 37 starts to move left and right reciprocatingly.

[0035] like Figure 4 As shown, an air intake frame 39 is fixedly installed at the rear part of the upper end of the mounting frame 31, a blower 310 is fixedly installed on the inner wall of the air intake frame 39, an air supply hose is fixedly installed at the lower end of the air intake frame 39, a blowing pipe 311 is fixedly installed at the end of the air supply hose away from the air intake frame 39, a movable groove is opened in the middle part of the upper end of the mounting frame 31, the left and right ends of the outer wall of the blowing pipe 311 are fixedly connected to the bottom of the outer wall of the moving rod 37, a plurality of dust removal heads 312 arranged linearly are fixedly installed on the bottom of the outer wall of the blowing pipe 311, and the front and rear sides of the mounting frame 31 are rotatably connected with limit rollers.

[0036] The internal motor of the blower 310 drives the impeller to rotate, so that air flows in. The outlet of the blower 310 is fixedly connected to the air hose. The air flows into the air hose and is then transported to the blowing pipe 311. Then, a plurality of dust removal heads 312 act on the surface of the positive electrode sheet. At the same time, the moving rod 37 drives the blowing pipe 311 to move back and forth through the moving groove, thereby expanding the area acted on by the dust removal head 312. The two limiting rollers play a limiting role when the positive electrode sheet moves, so that the positive electrode sheet will not be wrinkled during transmission, and the dust removal effect is improved.

[0037] like Figure 5 and Figure 6As shown, the glue flattening assembly 4 includes a support frame 41, the left and right parts of the upper end of the support frame 41 are rotatably connected with an adjusting screw 42, the outer wall of the adjusting screw 42 is threadedly connected with a moving block 43, a slide groove 44 is opened in the middle part of the upper end of the support frame 41, and a connecting plate 45 is fixedly installed at the lower end of the moving block 43. The front and rear sides of the bottom of the connecting plate 45 are slidably connected to the inner wall of the slide groove 44, and a cylinder 46 is fixedly installed at the lower end of the connecting plate 45. A U-shaped frame 47 is fixedly installed at the lower end of the cylinder 46, and an electric clamp 48 is fixedly installed on the right side of the U-shaped frame 47. The rear part of the upper end of the base 1 is rotatably connected with a support roller, and the support roller is located directly below the support frame 41.

[0038] By rotating the adjusting screw 42, the moving block 43 is threadedly connected with the adjusting screw 42, and drives the connecting plate 45 to slide in the slide groove 44, and the connecting plate 45 drives the cylinder 46 and the U-shaped frame 47 to slide, and the output end of the cylinder 46 can drive the U-shaped frame 47 and the electric clamp 48 to move to a suitable position, so that the electric clamp 48 can clamp one end of the tape to glue the positive electrode sheet. Among them, the electric clamp 48 is an existing mechanism and will not be elaborated on here. The support roller not only supports and guides the positive electrode sheet, but also facilitates gluing the positive electrode sheet.

[0039] like Figure 5 As shown, a tape unwinding mechanism 49 is movably connected to the top right side of the support frame 41 , a through slot is provided at the top right side of the support frame 41 , and an electric cutting mechanism 410 is fixedly installed at the right position of the top inner wall of the support frame 41 .

[0040] The tape unwinding mechanism 49 is composed of an adjusting motor and an adjusting roller, wherein the tape is sleeved on the adjusting roller and is easy to disassemble. One end of the adjusting roller is fixedly connected to the output end of the adjusting motor. The tape enters the interior of the support frame 41 through the through slot. The electric cutting mechanism 410 includes an electric push rod and a cutting knife. The non-sharp end of the cutting knife is fixedly connected to the output end of the electric push rod. When the tape is clamped by the electric clamp 48, the adjusting motor starts, and the electric clamp 48 drives the tape to cover the surface of the positive electrode sheet. After a certain length, the adjusting motor stops, and the electric push rod drives the cutting knife to cut the tape.

[0041] like Figure 7As shown, the left parts of the front and rear sides of the U-shaped frame 47 are rotatably connected with adjusting rods 411, and the bottoms of the opposite sides of the two adjusting rods 411 are rotatably connected with pressure rollers 412. Storage grooves are provided at the bottom positions of the left parts of the front and rear sides of the U-shaped frame 47, and the inner walls of the two storage grooves are fixedly installed with sliding rods 413, and the outer walls of the two sliding rods 413 are slidably connected with sliders 414. The ends of the two adjusting rods 411 away from the pressure rollers 412 are rotatably connected to the sides of the two sliders 414 away from each other, and the right parts of the outer walls of the two sliding rods 413 are movably sleeved with buffer springs 415, and the right ends of the two buffer springs 415 are fixedly connected to the right parts of the inner walls of the two storage grooves, and the left ends of the two buffer springs 415 are fixedly connected to the right sides of the two sliders 414.

[0042] After the tape is pasted, the pressure roller 412 contacts the surface of the tape. During the movement, the pressure roller 412 can rotate through two adjusting rods 411. The two adjusting rods 411 push the corresponding sliders 414 to slide on the two slide bars 413. At the same time, the two buffer springs 415 are subjected to extrusion force or tension force. The elastic potential energy of the two buffer springs 415 can protect the surface of the positive electrode sheet and buffer the force applied by the pressure roller 412 to the positive electrode sheet and the tape.

[0043] The working principle of the utility model is as follows: the staff places the coil on the electric unwinding roller 21, and the coil passes through the bottom of the outer wall of the two limiting rollers, and is then reeled by the electric reeling roller 22. During the movement of the coil, the motor 33 and the blower 310 are started, the output end of the motor 33 drives the disc 34 to rotate, and the disc 34 drives the limiting rod 35 to rotate, so that the moving rod 37 moves back and forth left and right through the moving sleeve 36, and the moving rod 37 drives the blowing pipe 311 to move back and forth. At the same time, the blower 310 inputs air flow into the air supply hose, and the air flow is blown from the blowing pipe 311 to the surface of the unfolded surface of the positive electrode sheet by a plurality of dust removal heads 312, thereby expanding the dust removal area of ​​the positive electrode sheet and facilitating subsequent processing.

[0044] When the positive electrode sheet to be glued passes through the support roller, the electric unwinding roller 21 and the electric winding roller 22 automatically stop running, the staff rotates the adjusting screw 42, and the moving block 43 drives the connecting plate 45 to move to the right by being threadedly connected with the adjusting screw 42, and the cylinder 46 is started. The output end of the cylinder 46 drives the electric clamp 48 to move to a position where it can touch the tape. The electric clamp 48 clamps one end of the tape, and the tape unwinding mechanism 49 is started accordingly. The tape follows the electric clamp 48 to cover the surface of the positive electrode sheet. After the surface of the positive electrode sheet is completely covered, the adjusting screw 42 stops rotating, and the tape unwinding mechanism 49 stops running, and the electric cutting mechanism 410 automatically cuts the tape.

[0045] The adjusting screw 42 is rotated to make the pressure roller 412 roll on the adhesive bonding surface of the positive electrode sheet. During the rolling of the pressure roller 412, it can be rotated by two adjusting rods 411. When the corresponding adjusting rod 411 is rotated, the corresponding slider 414 slides on the two slide rods 413, and the two buffer springs 415 are squeezed at the same time. The elastic potential energy of the two buffer springs 415 can protect the adhesive bonding surface of the positive electrode sheet.

[0046] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A nickel-metal hydride battery positive electrode dust removal and gluing device, comprising a base (1), characterized in that: A limit guide assembly (2) is fixedly mounted on the front and rear upper ends of the base (1), a dust removal assembly (3) is fixedly mounted on the front upper end of the base (1), and a glue flattening assembly (4) is fixedly mounted on the rear upper end of the base (1), the dust removal assembly (3) and the glue flattening assembly (4) being located between the limit guide assembly (2).

2. A nickel-hydrogen battery positive electrode dust removal and gluing device according to claim 1, characterized in that: The position limiting guide assembly (2) comprises an electric unwinding roller (21) and an electric winding roller (22), the left and right ends of the electric unwinding roller (21) being rotatably connected to the left and right positions of the front upper end of the base (1), and the left and right ends of the electric winding roller (22) being rotatably connected to the left and right positions of the rear upper end of the base (1).

3. A nickel-hydrogen battery positive electrode dust removal and gluing device according to claim 2, characterized in that: The dust removal assembly (3) comprises a mounting frame (31), the lower end of the mounting frame (31) being fixedly mounted to the left and right positions of the front portion of the upper end of the base (1), the mounting frame (31) being located behind the electric unwinding roller (21), a mounting plate (32) being fixedly mounted to the left portion of the upper end of the mounting frame (31), a motor (33) being fixedly mounted to the rear side of the mounting plate (32), the front portion of the outer wall of the output end of the motor (33) penetrating the rear portion of the mounting plate (32) and being fixedly sleeved with a disc (34), and a limiting rod (35) being fixedly mounted at the front edge of the disc (34).

4. A nickel-hydrogen battery positive electrode dust removal and gluing device according to claim 3, characterized in that: The outer wall of the limit rod (35) is slidably connected to a moving sleeve (36), a moving rod (37) is fixedly mounted on the right side of the moving sleeve (36), and fixed blocks (38) are fixedly mounted on the left and right parts of the upper end of the mounting frame (31), and the outer wall of the moving rod (37) is slidably connected to the inner walls of the two fixed blocks (38).

5. A nickel-hydrogen battery positive electrode dust removal and gluing device according to claim 4, characterized in that: An air intake frame (39) is fixedly mounted on the rear portion of the upper end of the mounting frame (31), a blower (310) is fixedly mounted on the inner wall of the air intake frame (39), an air delivery hose is fixedly mounted on the lower end of the air intake frame (39), and a blow pipe (311) is fixedly mounted on one end of the air delivery hose away from the air intake frame (39), a movable groove is provided in the middle portion of the upper end of the mounting frame (31), the left and right ends of the outer wall of the blow pipe (311) are fixedly connected to the bottom of the outer wall of the movable rod (37), a plurality of linearly arranged dust removal heads (312) are fixedly mounted on the bottom of the outer wall of the blow pipe (311), and the front and rear sides of the mounting frame (31) are rotatably connected to limit rollers.

6. A nickel-hydrogen battery positive electrode dust removal and gluing device according to claim 1, characterized in that: The glue flattening assembly (4) comprises a support frame (41), the left and right parts of the upper end of the support frame (41) are rotatably connected to an adjusting screw (42), the outer wall of the adjusting screw (42) is threadedly connected to a moving block (43), a sliding groove (44) is provided in the middle part of the upper end of the support frame (41), a connecting plate (45) is fixedly installed at the lower end of the moving block (43), the front and rear sides of the bottom of the connecting plate (45) are slidably connected to the inner wall of the sliding groove (44), a cylinder (46) is fixedly installed at the lower end of the connecting plate (45), a U-shaped frame (47) is fixedly installed at the lower end of the cylinder (46), an electric clamp (48) is fixedly installed on the right side of the U-shaped frame (47), and a support roller is rotatably connected to the rear part of the upper end of the base (1), and the support roller is located directly below the support frame (41).

7. A nickel-hydrogen battery positive electrode dust removal and gluing device according to claim 6, characterized in that: The top right side of the support frame (41) is movably connected to a tape unwinding mechanism (49), the top right side of the support frame (41) is provided with a through slot, and the right portion of the top inner wall of the support frame (41) is fixedly mounted with an electric cutting mechanism (410).

8. A nickel-hydrogen battery positive electrode dust removal and gluing device according to claim 7, characterized in that: The left parts of the front and rear sides of the U-shaped frame (47) are rotatably connected to adjustment rods (411), and the bottoms of the opposite sides of the two adjustment rods (411) are rotatably connected to pressure rollers (412). The bottom positions of the left parts of the front and rear sides of the U-shaped frame (47) are provided with storage grooves, and the inner walls of the two storage grooves are fixedly installed with sliding rods (413), and the outer walls of the two sliding rods (413) are slidably connected with sliders (414). The ends of the two adjustment rods (411) away from the pressure rollers (412) are rotatably connected to the two sliders (414) away from each other. The right parts of the outer walls of the two sliding rods (413) are movably sleeved with buffer springs (415), and the right ends of the two buffer springs (415) are fixedly connected to the right parts of the inner walls of the two storage grooves, and the left ends of the two buffer springs (415) are fixedly connected to the right sides of the two sliders (414).

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