Pole piece cutter mechanism

Abstract

The utility model relates to a pole piece cutter mechanism in the field of cutter mechanisms, which comprises a workbench, a cutter assembly, a driving assembly and a guide assembly, the driving assembly can be connected with the cutter assembly through the guide assembly, the guide assembly comprises a cam block, a follow-up bearing, a push block, a first guide rail and a first sliding block, and the cam block is in transmission connection with the driving assembly. A guide sliding groove is formed in the surface of the cam block, one end of the push block is in transmission connection with the cutter assembly, the follow-up bearing is arranged on the push block, the end, away from the push block, of the follow-up bearing is inserted into the guide sliding groove, the follow-up bearing is in sliding connection with the guide sliding groove, the first guide rail is arranged on the workbench, and the push block is connected with the first guide rail through the first sliding block. During cutting, the driving assembly does not need to do one-time reciprocating motion, the cutting efficiency is higher, the first guide rail and the first sliding block counteract the force generated by the cam block on the follow-up bearing along the axis of the driving assembly, the stability of the cutter assembly is improved, and the cutting effect is better.

Description

Technical Field

[0001] The utility model relates to the field of cutting knife mechanisms, in particular to a pole piece cutting knife mechanism. Background Art

[0002] The winding of lithium battery cells is an important link in the manufacturing process of lithium batteries, and its quality directly affects the performance and safety of the final battery. The winding of lithium battery cells, also known as the winding process, is the process of winding the positive electrode sheet, negative electrode sheet and separator film together through the winding needle mechanism of a winding machine to form a bare cell (Jelly-Roll, abbreviated as JR). During this process, the adjacent positive and negative electrode sheets are isolated by the separator film to avoid short circuits. The positive electrode sheet, negative electrode sheet and separator film are prepared according to certain specifications and sequences to ensure that their widths, lengths and qualities meet the process requirements, and are fed into the winding needle mechanism of the winding machine. Through the precise control of the winding machine, they are tightly wound together. During the winding process, it is necessary to ensure that there is no physical contact short circuit between the positive and negative electrodes, and the negative electrode sheet can completely cover the positive electrode sheet. After winding, the winding core is fixed with end adhesive tape to prevent it from spreading.

[0003] The pole piece cutting knife is an important step in the production process of lithium batteries. The cutting quality of lithium battery pole pieces directly affects the performance and quality of the battery. Problems such as burrs, impurities and poor dimensional accuracy on the cutting edge may cause safety problems such as internal short circuits, self-discharge and thermal runaway in the battery. Therefore, a suitable cutting device and strict operation according to the operating procedures are of great significance for improving the production quality and safety of lithium batteries.

[0004] When the cutting knife mechanism for cutting lithium battery pole pieces is working, a cam block is driven by a linearly movable driving component. The cutting knife component is connected to the cam block through a follower bearing. A guiding chute is arranged on the cam block. When the cam block moves, it can push the follower bearing, so that the follower bearing drives the cutting knife component to move. In the existing cutting knife mechanism, while the cutting knife makes a reciprocating motion once, the cam block also needs to make a reciprocating motion once. When the cam block moves unidirectionally, the cutting knife can only perform one of the actions of cutting or opening. For the cam block to make a reciprocating motion once, the driving component needs to work in the forward and reverse directions twice, with low efficiency, large loss and poor cutting effect. Summary of the Utility Model

[0005] In order to overcome the deficiencies of the prior art solutions, the utility model provides a pole piece cutting knife mechanism, which can effectively solve the technical problem that the driving component needs to work in the forward and reverse directions twice for the cam block to make a reciprocating motion once.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The pole piece cutting tool mechanism includes a workbench, a cutting tool assembly, a driving assembly, and a guiding assembly. The guiding assembly, the cutting tool assembly, and the driving assembly are arranged on the workbench. The driving assembly can be connected to the cutting tool assembly through the guiding assembly and drive the cutting tool assembly to move reciprocally. The guiding assembly includes a cam block, a follower bearing, a push block, a first guide rail, and a first slider. The cam block is in transmission connection with the driving assembly. The driving assembly can drive the cam block to move along the X-axis direction. The surface of the cam block is provided with a "V"-shaped guiding chute. One end of the push block is in transmission connection with the cutting tool assembly. The follower bearing is arranged on the push block. The end of the follower bearing away from the push block is inserted into the guiding chute. The follower bearing is in sliding connection with the guiding chute. The first guide rail is arranged on the workbench. The push block is connected to the first guide rail through the first slider. The push block can move along the Z-axis direction.

[0008] Further, guiding columns and guiding sleeves are arranged on the workbench. The axes of the guiding columns and the guiding sleeves are parallel to the axis of the first guide rail. One end of the guiding column is connected to the cutting tool assembly. The end of the guiding column away from the cutting tool assembly passes through the guiding sleeve. The guiding column is in sliding connection with the guiding sleeve.

[0009] Further, the driving assembly includes a driving motor, a ball screw, a screw nut, an outer sleeve, and a bearing seat. Both ends of the ball screw are arranged on the workbench through the bearing seat. The driving motor is in transmission connection with one end of the ball screw. The screw nut is in transmission connection with the ball screw. The screw nut is fixedly connected to the cam block through the outer sleeve. When the screw nut moves, it can drive the cam block to move together.

[0010] Further, a second guide rail is arranged on the workbench. The axis of the second guide rail is parallel to the axis of the ball screw. The outer sleeve is in sliding connection with the second guide rail through the second slider.

[0011] Further, the cutting tool assembly includes a cutting tool seat, a moving knife, and a fixed knife. The moving knife is arranged on the cutting tool seat. A knife groove is arranged on the workbench. The fixed knife is fixedly arranged in the knife groove. The cutting edges of the moving knife and the fixed knife are arranged at opposite ends and are aligned with each other. A feeding channel is formed between the moving knife and the fixed knife. The cutting tool seat is detachably connected to the push block.

[0012] Further, a material seat is also arranged on the cutting tool seat. The material seat is connected to the cutting tool seat through a push column. An air channel is arranged in the material seat. An air intake pipe is arranged on the side wall of the material seat. The air intake pipe extends to the outside of the workbench. The air intake pipe can be connected to a vacuum pump. A plurality of air holes are arranged at one end of the material seat close to the moving knife.

[0013] Further, a guiding hole is arranged on the cutting tool seat. The end of the push column away from the material seat is inserted into the guiding hole. A return spring is arranged in the guiding hole. Both ends of the return spring are respectively abutted against one end of the push column and the inner wall of the guiding hole.

[0014] Further, a protective cover is provided on the workbench, and the protective cover can cover the driving component and the guiding component.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: a "V"-shaped guiding chute is provided on the surface of the cam block. When the driving component drives the cam block to move, the cam block only needs to move from one end of the workbench to the other end to achieve one opening and closing of the cutting tool component. When the follower bearing is located at the edge of the guiding chute, the cutting tool component is opened. When the cam block moves, the follower bearing moves in the guiding chute, and the follower bearing drives the push block to move. The first guide rail and the first slider can limit the moving direction of the push block. When the follower bearing moves to the middle section of the guiding chute, the cutting tool component closes to cut off the pole piece of the lithium battery. After the follower bearing continues to move to the other end of the guiding chute, the cutting tool component is opened again to complete a reciprocating motion. During cutting, the driving component does not need to perform a reciprocating motion, and the cutting efficiency is higher. The first guide rail and the first slider offset the force generated by the cam block on the follower bearing along the axis of the driving component, improve the stability of the cutting tool component, and the cutting effect is better. Description of the Drawings

[0016] Figure 1 is the front perspective view of the present utility model;

[0017] Figure 2 is the bottom perspective view of the present utility model;

[0018] Figure 3 is the exploded view of the structure of the present utility model;

[0019] Figure 4 is the structural schematic diagram of the cutting tool component and the workbench in the present utility model;

[0020] Figure 5 is the perspective view of the guiding component in the present utility model;

[0021] Reference numerals in the drawings: 1 - workbench, 2 - cutting tool component, 201 - cutting tool holder, 202 - moving knife, 203 - fixed knife, 204 - feeding channel, 205 - material seat, 206 - connecting air pipe, 3 - driving component, 301 - driving motor, 302 - ball screw, 303 - screw nut, 304 - outer sleeve, 305 - bearing seat, 306 - second slider, 307 - second guide rail, 4 - guiding component, 401 - cam block, 402 - follower bearing, 403 - push block, 404 - first guide rail, 405 - first slider, 406 - guiding chute, 5 - protective cover, 6 - guiding column, 7 - guiding sleeve. Detailed Embodiments

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] The following will be combined with Figures 1 - 5 to make a detailed description of the pole piece cutting mechanism of the present utility model:

[0024] The pole piece cutting mechanism includes a workbench 1, a cutting tool assembly 2, a driving assembly 3, and a guiding assembly 4. The guiding assembly 4, the cutting tool assembly 2, and the driving assembly 3 are arranged on the workbench 1. The driving assembly 3 can be connected to the cutting tool assembly 2 through the guiding assembly 4 and drive the cutting tool assembly 2 to move reciprocally. The driving assembly 3 includes a driving motor 301, a ball screw 302, a screw nut 303, an outer sleeve 304, and a bearing block 305. Both ends of the ball screw 302 are passed through, and the bearing block 305 is arranged on the workbench 1. The driving motor 301 is in transmission connection with one end of the ball screw 302. The screw nut 303 is in transmission connection with the ball screw 302. The screw nut 303 is fixedly connected to the cam block 401 through the outer sleeve 304. When the screw nut 303 moves, it can drive the cam block 401 to move together. A second guide rail 307 is arranged on the workbench 1. The axis of the second guide rail 307 is parallel to the axis of the ball screw 302. The outer sleeve 304 is slidably connected to the second guide rail 307 through a second slider 306. The second guide rail 307 and the second slider 306 can improve the stability of the cam block 401 when it moves.

[0025] The cutter assembly 2 includes a cutter base 201, a moving cutter 202 and a fixed cutter 203. The moving cutter 202 is arranged on the cutter base 201. A cutter groove is arranged on the workbench 1, and the fixed cutter 203 is fixedly arranged in the cutter groove. The cutting edges of the moving cutter 202 and the fixed cutter 203 are arranged at opposite ends and are aligned with each other. A feeding channel 204 is formed between the moving cutter 202 and the fixed cutter 203. One end of the cutter base 201 close to the pushing block 403 is provided with a "T"-shaped clamping groove, and one end of the pushing block 403 close to the cutter base 201 is provided with a "T"-shaped clamping post, and the clamping post is engaged with the clamping groove. A material seat 205 is further arranged on the cutter base 201. The material seat 205 is connected to the cutter base 201 through a pushing column. An air passage is arranged in the material seat 205. An air connecting pipe 206 is arranged on the side wall of the material seat 205, and the air connecting pipe 206 extends to the outside of the workbench 1. The air connecting pipe 206 can be connected to a vacuum pump. A plurality of air holes are arranged at one end of the material seat 205 close to the moving cutter 202. The vacuum pump can pump out the air in the material seat 205, and the air pressure in the material seat 205 is less than the external air pressure, so that the pole piece can be adsorbed on the material seat 205. A guiding hole is arranged on the cutter base 201. One end of the pushing column far from the material seat 205 is inserted into the guiding hole. A return spring is arranged in the guiding hole, and both ends of the return spring are tightly abutted against one end of the pushing column and the inner wall of the guiding hole respectively. When the cutter base 201 moves, the material seat 205 moves together. When the moving cutter 202 and the fixed cutter 203 are closed, the material seat 205 can press the pole piece against the inner wall of the workbench 1, avoiding the position of the pole piece from moving during cutting and improving the cutting accuracy.

[0026] The guiding assembly 4 includes a cam block 401, a follower bearing 402, a pushing block 403, a first guide rail 404 and a first slider 405. The cam block 401 is in transmission connection with the driving assembly 3. The driving assembly 3 can drive the cam block 401 to move along the X-axis direction. The surface of the cam block 401 is provided with a "V"-shaped guiding chute 406. One end of the pushing block 403 is in transmission connection with the cutter assembly 2. The follower bearing 402 is arranged on the pushing block 403. One end of the follower bearing 402 far from the pushing block 403 is inserted into the guiding chute 406, and the follower bearing 402 is slidably connected with the guiding chute 406. The first guide rail 404 is arranged on the workbench 1, and the pushing block 403 is connected to the first guide rail 404 through the first slider 405, and the pushing block 403 can move along the Z-axis direction. A protective cover 5 is arranged on the workbench 1, and the protective cover 5 can cover the driving assembly 3 and the guiding assembly 4, avoiding dust and impurities from falling into the driving assembly 3 and the guiding assembly 4 and affecting the stability during movement. Guide posts 6 and guide sleeves 7 are arranged on the workbench 1. The axes of the guide posts 6 and the guide sleeves 7 are parallel to the axis of the first guide rail 404. One end of the guide post 6 is connected to the cutter assembly 2, and one end of the guide post 6 far from the cutter assembly 2 passes through the guide sleeve 7, and the guide post 6 is slidably connected with the guide sleeve 7.

[0027] In the pole piece cutting tool mechanism of this embodiment, a "V"-shaped guiding chute 406 is arranged on the surface of the cam block 401. When the driving motor 301 operates, it drives the ball screw 302 to rotate, causing the screw nut 303 to drive the cam block 401 to move from one end to the other end on the workbench 1, thereby realizing one opening and closing of the moving cutter 202 and the fixed cutter 203. When the follower bearing 402 is located at the edge of the guiding chute 406, the moving cutter 202 and the fixed cutter 203 are opened. When the cam block 401 moves, the follower bearing 402 moves within the guiding chute 406, and the follower bearing 402 drives the push block 403 to move. The first guide rail 404 and the first slider 405 can limit the moving direction of the push block 403. When the follower bearing 402 moves to the middle section of the guiding chute 406, the moving cutter 202 and the fixed cutter 203 are closed to cut off the pole piece of the lithium battery. After the follower bearing 402 continues to move to the other end of the guiding chute 406, the moving cutter 202 and the fixed cutter 203 are opened again, completing one reciprocating motion. During cutting, the driving motor 301 does not need to rotate forward and backward twice, and the cutting efficiency is higher. The first guide rail 404 and the first slider 405 counteract the force generated by the cam block 401 on the follower bearing 402 along the axis of the driving assembly 3, improving the stability of the cutting tool assembly 2 and achieving a better cutting effect.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. The pole piece cutting tool mechanism includes a workbench, a cutting tool assembly, a driving assembly, and a guiding assembly. The guiding assembly, the cutting tool assembly, and the driving assembly are arranged on the workbench. The workbench can be installed on [a certain device]. The driving assembly can be connected to the cutting tool assembly through the guiding assembly and drive the cutting tool assembly to reciprocate. It is characterized in that: The guiding component includes a cam block, a follower bearing, a pushing block, a first guide rail and a first slider. The cam block is in transmission connection with the driving component, and the driving component can drive the cam block to move in the X-axis direction. The surface of the cam block is provided with a "V"-shaped guiding chute. One end of the pushing block is in transmission connection with the cutting tool component. The follower bearing is arranged on the pushing block, and the end of the follower bearing away from the pushing block is inserted into the guiding chute. The follower bearing is slidably connected with the guiding chute. The first guide rail is arranged on the workbench, and the pushing block is connected with the first guide rail through the first slider. The pushing block can move in the Z-axis direction.

2. The pole piece cutting tool mechanism according to claim 1, wherein: The workbench is provided with a guiding post and a guiding sleeve. The axes of the guiding post and the guiding sleeve are both parallel to the axis of the first guide rail. One end of the guiding post is connected with the cutting tool component, and the end of the guiding post away from the cutting tool component passes through the guiding sleeve. The guiding post is slidably connected with the guiding sleeve.

3. The pole piece cutting tool mechanism according to claim 1, characterized in that: The driving component includes a driving motor, a ball screw, a screw nut, an outer sleeve and a bearing seat. The two ends of the ball screw are passed through, and the bearing seat is arranged on the workbench. The driving motor is in transmission connection with one end of the ball screw. The screw nut is in transmission connection with the ball screw. The screw nut is fixedly connected with the cam block through the outer sleeve. When the screw nut moves, it can drive the cam block to move together.

4. The pole piece cutting tool mechanism according to claim 3, wherein: The workbench is provided with a second guide rail. The axis of the second guide rail is parallel to the axis of the ball screw. The outer sleeve is slidably connected with the second guide rail through the second slider.

5. The pole piece cutting tool mechanism according to any one of claims 1-4, characterized in that: The cutting tool component includes a cutting tool seat, a moving cutter and a fixed cutter. The moving cutter is arranged on the cutting tool seat. The workbench is provided with a tool groove, and the fixed cutter is fixedly arranged in the tool groove. The cutting edges of the moving cutter and the fixed cutter are arranged at the opposite ends and are aligned with each other. A feeding channel is formed between the moving cutter and the fixed cutter. The cutting tool seat is detachably connected with the pushing block.

6. The pole piece cutting tool mechanism according to claim 5, wherein: The cutting tool seat is further provided with a material seat. The material seat is connected with the cutting tool seat through a pushing column. An air channel is arranged in the material seat. An air intake pipe is arranged on the side wall of the material seat. The air intake pipe extends to the outside of the workbench. The air intake pipe can be connected with a vacuum pump. A plurality of air holes are arranged at one end of the material seat close to the moving cutter.

7. The pole piece cutting tool mechanism according to claim 6, characterized in that: A guiding hole is arranged on the cutting tool seat. The end of the pushing column away from the material seat is inserted into the guiding hole. A return spring is arranged in the guiding hole. The two ends of the return spring are respectively abutted against one end of the pushing column and the inner wall of the guiding hole.

8. The pole piece cutting tool mechanism according to any one of claims 1-4, characterized in that: A protective cover is arranged on the workbench. The protective cover can cover the driving component and the guiding component.

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