CN218891234U

CN218891234U - Pole piece shearing device

Info

Publication number: CN218891234U
Application number: CN202223058948.1U
Authority: CN
Inventors: 黄家园; 罗二天; 吴奇璋; 郑柱欢
Original assignee: Huizhou Yinghe Intelligent Technology Co ltd
Current assignee: Huizhou Yinghe Intelligent Technology Co ltd
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-04-21
Anticipated expiration: 2032-11-17

Abstract

The utility model provides a pole piece shearing device. The utility model provides a pole piece shearing mechanism, includes cutter mechanism, cam drive subassembly and is used for driving cam drive subassembly bulk movement's stroke stack subassembly, cutter mechanism includes stationary knife subassembly and moves the knife subassembly, moves the one end and cam drive subassembly sliding connection of knife subassembly, and cam drive subassembly connects the one end at stroke stack subassembly. According to the utility model, the stroke superposition assembly is matched with the cam driving assembly to synchronously drive the translation of the cam follower, the stroke superposition assembly can increase the moving stroke of the moving knife, the cam driving assembly and the stroke superposition assembly are matched with the movement of the cutter moving mechanism for fixed-point cutting due to structural design, the reaction time is shorter, the consistency of the interval of each cutting is realized, the length of each cut pole piece is uniform, the shearing efficiency is effectively improved, the instantaneous impact force generated by the pole piece is smaller, the pole piece cutting is more stable, and the quality of a cutting opening is good.

Description

Pole piece shearing device

Technical Field

The utility model relates to the field of battery pole piece processing and arranging, in particular to a pole piece shearing device.

Background

The technology of new energy automobiles is continuously changing rapidly, a power battery is a core of the new energy automobile, an electrode core pole piece is an important component part of the power battery, in the processing process of the electrode core pole piece, a composite material is generally pressed on two sides of a current collector to form the pole piece, the processed pole piece is in a strip shape, and when the specific length requirement is met, the pole piece is cut through a pole piece cutter mechanism or a mechanical cutting mechanism. The existing pole piece cutter mechanism mostly uses an electromagnetic valve to control an air cylinder to cut off a pole piece, the electromagnetic valve and the air cylinder are in induction extension and retraction to cut off the pole piece, the reaction time is long, the consistency of the intervals of each cutting is difficult to realize, the length of the pole piece cut is inconsistent correspondingly, the shearing efficiency is low, and the production speed is greatly influenced. And because the distance that moves sword and stationary knife open and shut is bigger in current shearing mechanism, if only rely on single actuating mechanism to control the closure of brake sword toward the stationary knife, the impact of cutter is great, can lead to cutting the pole piece unstable, the cutting mouth is damaged.

Disclosure of Invention

The utility model provides a pole piece shearing device, which aims to solve the problems that in the background technology, the electromagnetic valve and the air cylinder are in induction extension and retraction to cut off pole pieces, the reaction time is long, the consistency of intervals of each cutting is difficult to realize, the cutting lengths of the pole pieces are inconsistent correspondingly, the shearing efficiency is low, and the production speed is greatly influenced. The utility model has sensitive shearing reaction, high shearing consistency and better shearing effect.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a pole piece shearing mechanism, includes cutter mechanism, cam drive subassembly and is used for driving the stroke stack subassembly that cam drive subassembly wholly removed, cutter mechanism include the stationary knife subassembly and with the movable knife subassembly of stationary knife subassembly cooperation effect, the one end of movable knife subassembly with cam drive subassembly sliding connection, cam drive subassembly connects the one end of stroke stack subassembly.

Further, the stroke stack subassembly include driving motor, rolling disc, first roller and with the driven structure that cam drive subassembly is connected, driving motor's output shaft with the bottom surface center fixed connection of rolling disc, the top surface of rolling disc is including being located the cam in central authorities and encircle the solid fixed ring seat that the cam set up, form one encircle in between solid fixed ring seat and the cam the ring channel of cam, first roller one end sliding connection is in the ring channel, the other end and driven structure fixed connection.

Further, the driven structure comprises a connecting plate and sliding rails fixed on an external large plate, sliding blocks which are parallel to each other are respectively fixed on two opposite sides of the top surface of the connecting plate, the sliding blocks are in sliding connection with the sliding rails, the first rollers are fixedly connected onto the connecting plate, and one side, adjacent to the 2 sliding blocks, of the connecting plate is connected with the cam driving assembly.

Further, the sliding rail is a linear sliding rail.

Further, cam drive subassembly includes cylinder block, lift cylinder, second roller and slide, the cylinder block through the connecting block that is equipped with one side fixed connection of connecting plate, the cylinder body of lift cylinder is fixed to be located on the cylinder block, the piston rod of lift cylinder with the bottom of slide is connected, the guide slot of serving as second roller travel path has been seted up at the top of slide, have one to keeping away from on the guide slot the protruding arc portion in stationary knife subassembly one side, second roller sliding connection is in the guide slot, the top of second roller with move the knife subassembly and be connected.

Preferably, the connecting block is vertically connected with the connecting plate to form an L-shaped structure.

Further, the stationary knife subassembly includes stationary knife seat and locates stationary knife head of stationary knife seat one side, move the knife subassembly including moving the blade holder, locating move blade holder one side and with the relative movable knife head that sets up of stationary knife head and can drive move the blade head toward the cam follower that stationary knife head removed, move the blade holder with the both ends of the relative one side of stationary knife seat all are equipped with the guide pillar, the tip activity of guide pillar is inserted and is established in the guiding hole that corresponds to be equipped with on the stationary knife seat, cam follower one end is connected the bottom of moving the blade holder, the other end with second roller fixed connection.

Preferably, the extending direction of the lifting cylinder is perpendicular to the guide post, and the sliding rail is parallel to the guide post.

Further, the fixed cutter seat is arranged right above the guide groove, a avoidance groove matched with the cam follower block in shape is formed in the bottom of the fixed cutter seat, and the cam follower block movably penetrates through the avoidance groove and is connected with the bottom of the movable cutter seat.

Preferably, the driving motor is a servo motor.

Compared with the prior art, the beneficial effects are that: according to the utility model, the stroke superposition assembly is matched with the cam driving assembly to synchronously drive the translation of the cam follower, so that the movable cutter head is driven to move towards one side of the fixed cutter head to finish meshing, the cutting of the pole piece is realized, the stroke superposition assembly can increase the moving stroke of the movable cutter, and the shearing is quickly and effectively finished, the cam driving assembly and the stroke superposition assembly do not need to sense the pole piece in place and then shear, but directly perform fixed-point cutting by being matched with the movement of the cutter moving mechanism due to structural design, the reaction time is shorter, the consistency of the interval of each cutting is realized, the length of each cut pole piece is uniform, the shearing efficiency is effectively improved, and the instantaneous impact force generated on the pole piece is smaller through the synchronous action of 2 different acting forces, so that the pole piece cutting is more stable, and the quality of a cutting opening is good.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

Fig. 2 is a schematic view of the structure of the utility model on the discharge side of the pole piece.

Fig. 3 is a schematic diagram of the structure of the row Cheng Diejia assembly of the present utility model.

Figure 4 is a schematic view of the cutter mechanism and cam drive assembly of the present utility model.

Fig. 5 is a schematic structural view of the cutter mechanism in the present utility model.

Fig. 6 is a schematic diagram of the cam drive assembly of the present utility model prior to pole piece cutting.

Fig. 7 is a schematic diagram of the cam drive assembly of the present utility model when the pole piece is cut.

Fig. 8 is a schematic diagram of the line Cheng Diejia assembly of the present utility model prior to pole piece cutting.

Fig. 9 is a schematic diagram of the line Cheng Diejia assembly of the present utility model as the pole piece is cut.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present utility model and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The pole piece refers to a pole piece mainly used for a battery cell of a power battery.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and for example, the particular relationship represented may be either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. It will be understood by those of ordinary skill in the art that the specific meaning of the terms described above in this application will be understood by those of ordinary skill in the art as the case may be.

The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:

example 1

As shown in fig. 1 and 2, the pole piece shearing device comprises a cutter mechanism 1, a cam driving assembly 2 and a stroke superposition assembly 3 for driving the cam driving assembly 2 to integrally move, wherein the cutter mechanism 1 comprises a fixed cutter assembly 15 and a movable cutter assembly 10 which is matched with the fixed cutter assembly 15, one end of the movable cutter assembly 10 is slidably connected with the cam driving assembly 2, and the cam driving assembly 2 is connected with one end of the stroke superposition assembly 3. Like this, in this embodiment, cam drive assembly 2 can drive the movable knife subassembly 10 in cutter mechanism 1 and remove to the fixed knife subassembly 15 side, and simultaneously, stroke stack subassembly 3 can drive whole cam drive assembly 2 and remove, and then also drive movable knife subassembly 10 and remove to the fixed knife subassembly 15, increase the travel of movable knife, accomplish shearing fast and effectively, cam drive assembly 2 and stroke stack subassembly 3 do not need to sense the pole piece and cut in place again, but directly cooperate the removal of cutter moving mechanism and carry out fixed point cutting, reaction time is shorter, realize the uniformity of the interval of cutting at every turn, make the pole piece length that cuts out at every turn even, effectively promoted shearing efficiency, and through 2 different effort synchro-actions, the instantaneous impact force that produces the pole piece can be less, make the pole piece cutting more stable, the cutting mouth quality is good.

Referring to fig. 3, the stroke superimposing assembly 3 in the present embodiment includes a drive motor 31, a rotary disk 32, a first roller 34, and a driven structure connected to the cam drive assembly 2; the output shaft of the driving motor 31 is fixedly connected with the center of the bottom surface of the rotating disc 32, the top surface of the rotating disc 32 comprises a cam 321 positioned at the center and a fixed ring seat 322 arranged around the cam 321, an annular groove 323 surrounding the cam 321 is formed between the fixed ring seat 322 and the cam 321, one end of the first roller 34 is slidably connected in the annular groove 323, and the other end of the first roller is fixedly connected with the driven structure; the driven structure comprises a connecting plate 33 and sliding rails 35 fixed on an external large plate, sliding blocks 36 which are parallel to each other are respectively and fixedly arranged on two opposite sides of the top surface of the connecting plate 33, the sliding blocks 36 are in sliding connection with the sliding rails 35, a first roller 34 is fixedly connected on the connecting plate 33, and one side, adjacent to the 2 sliding blocks 36, of the connecting plate 33 is connected with the cam driving assembly 2; the slide rail 35 is a linear slide rail 35. Thus, the driving motor 31 drives the rotating disc 32 to rotate within a certain angle range, the rotating disc 32 is provided with the annular groove 323, the middle of the annular groove 323 is a disc-shaped cam, the groove width of the annular groove 323 is changed, as shown in the figure, initially, the first roller 34 is positioned at the low point a of the cam 321, when the driving motor 31 drives the rotating disc 32 to rotate clockwise, the high point d of the cam 321 slowly rotates to a position contacted with the first roller 34, and then drives the first roller 34 to move for a certain distance, the first roller 34 is connected with the connecting plate 33, two sides of the top end of the connecting plate 33 are provided with the sliding blocks 36, and then integrally move along the linear sliding rail 35, one side of the connecting plate 33 is connected with the cam driving assembly 2, and when the connecting plate 33 moves along the sliding rail 35, the whole cam driving assembly 2 can be driven to move, and then the cutter mechanism 1 is driven to complete cutting, so that the stroke superposition is realized.

In this embodiment, the cam driving assembly 2 includes a cylinder seat 21, a lifting cylinder 22, a second roller 25 and a sliding seat 23, the cylinder seat 21 is fixedly connected with one side of a connecting plate 33 through a connecting block 37, a cylinder body of the lifting cylinder 22 is fixedly arranged on the cylinder seat 21, a piston rod of the lifting cylinder 22 is connected with the bottom of the sliding seat 23, a guide groove 24 serving as a moving path of the second roller 25 is formed at the top of the sliding seat 23, an arc-shaped portion 26 protruding towards one side far away from the fixed cutter assembly 15 is formed on the guide groove 24, the second roller 25 is slidingly connected in the guide groove 24, and the top end of the second roller 25 is connected with the movable cutter assembly 10; the connection block 37 is perpendicularly connected to the connection plate 33 to form an integrated L-shaped structure. In this way, the second roller 25, the movable cutter assembly 10 and the guide groove 24 on the slide 23 together form a linear cam mechanism, the second roller 25 is in contact with the side wall of the guide groove 24, and can only move along the track of the guide groove 24, the front section of the guide groove 24 is a linear groove, and the rear end of the guide groove is provided with an arc-shaped part 26 for changing the track direction of the second roller 25, so that the second roller 25 can drive the movable cutter assembly 10 to move towards the fixed cutter assembly 15 side integrally, and the shearing action is completed. On the other hand, the whole slide seat 23 is arranged at the end of the telescopic rod of the lifting cylinder 22, when the pole piece is required to be sheared, the lifting cylinder 22 is lifted, the second roller 25 falls into the guide groove 24, the cutter mechanism 1 is driven by the external cutter moving mechanism to move along the conveying direction of the pole piece 4, the front straight line section of the guide groove 24 is parallel to the conveying direction of the pole piece 4, when the arc-shaped part 26 is reached, the second roller 25 falls into the high position of the guide groove 24 from the low position of the guide groove 24, and then the movable cutter assembly 10 is driven to move in the direction perpendicular to the conveying direction of the pole piece (namely the Y direction in the figure), so that the pole piece is cut.

Referring to fig. 4 and 5, the fixed cutter assembly 15 includes a fixed cutter holder 16 and a fixed cutter head 17 disposed on one side of the fixed cutter holder 16, the movable cutter assembly 10 includes a movable cutter holder 11, a movable cutter head 12 disposed on one side of the movable cutter holder 11 and opposite to the fixed cutter head 17, and a cam follower block 14 capable of driving the movable cutter head 12 to move toward the fixed cutter head 17, guide posts 13 are disposed at two ends of the movable cutter holder 11 opposite to the fixed cutter holder 16, ends of the guide posts 13 are movably inserted into guide holes correspondingly disposed on the fixed cutter holder 16, and one end of the cam follower block 14 is connected with the bottom of the movable cutter holder 11, and the other end is fixedly connected with the second roller 25. The telescopic direction of the lifting cylinder 22 is perpendicular to the guide post 13, and the sliding rail 35 is parallel to the guide post 13. Thus, the second roller 25 is fixed to the cam follower block 14, the cam follower block 14 being located at the bottom of the movable blade holder 11, passing under the fixed blade holder 16 but being unconnected to the fixed blade holder 16; when the second roller 25 falls into the arc-shaped portion 26 of the guide groove 24 and then shifts in the Y direction, the cam follower block 14 drives the whole movable cutter assembly 10 to move along the guide hole to one side of the fixed cutter seat 16, and the movable cutter head 12 is engaged with the fixed cutter head 17, so that the cutting of the pole piece is realized.

The pole piece cutting device is applied to pole piece cutting in pole piece production, is matched with an external pole piece conveying device and a cutter moving mechanism, and has the following working principle: referring to fig. 1, 4, 6 and 7, the pole piece 4 passes through a gap between the fixed cutter head 17 and the movable cutter head 12 to be conveyed along the X direction, the conveying direction is parallel to the front straight line end of the guide groove 24, and the cutter moving mechanism drives the cutter mechanism 1 to reciprocate within the following cutting stroke range; when the pole piece 4 needs to be cut, the telescopic rod of the lifting cylinder 22 stretches out to drive the sliding seat 23 to jack up, and the driving cutter mechanism 1 of the embodiment mainly comprises two synchronous acting forces: after the slide seat 23 is jacked up, the second roller 25 is clamped into the guide groove 24, and as the second roller 25, the cam follower block 14 and the guide groove 24 are similar to a linear cam mechanism, the cam follower block 14 can also translate along with the second roller 25 in a certain range in the Y direction; initially, the second roller 25 is clamped from the head end of the guide groove 24, then moves along the track of the guide groove 24, when falling into the arc-shaped part 26 of the guide groove 24, the second roller can shift in the Y direction, and the movable cutter head 12 on the movable cutter seat 11 is driven by the cam follower to move towards the fixed cutter seat 16 side, so that the movable cutter head 12 is meshed with the fixed cutter head 17; on the other hand, referring to fig. 8 and 9, since after the slide 23 is lifted, the inner side wall of the guide slot 24 and the outer wall of the second roller 25 are already in contact with each other, when the slide 23 translates along the Y direction, the second roller 25 and the cam follower can be driven to move along the Y direction, so in this embodiment, a stroke stacking assembly 3 is additionally provided, in this stroke stacking assembly 3, the driving motor 31 drives the rotating disc 32 to rotate within a certain angle range, the rotating disc 32 has an annular groove 323, a disc-shaped cam is provided in the middle of the annular groove 323, the groove width of the annular groove 323 is changed, initially, as shown in fig. 8, the first roller 34 is located at a low point a of the cam 321, as shown in fig. 8, and when the driving motor 31 drives the rotating disc 32 to rotate clockwise, as shown in fig. 9, the high point d of the cam 321 rotates slowly to a position contacting the first roller 34, as shown in fig. 7, and further drives the first roller 34 to move a certain distance, the first roller 34 is connected with the top end 33, and the sliding block 33 is further connected with the sliding rail 35, and the sliding rail 35 is further moved along the sliding rail 35, and the sliding rail 35 is completed along the direction. So this embodiment is through the translation that cam drive assembly 2 synchronous drive cam follower was overlapped to stroke subassembly 3, and then drive movable cutter head 12 and remove to fixed cutter head 17 one side, accomplish the interlock, realize the cutting of pole piece, stroke stack subassembly 3 can increase movable cutter's travel path, accomplish the shearing fast effectively, cam drive assembly 2 and stroke stack subassembly 3 all need not sense the pole piece and cut in place again, but directly because structural design cooperates the removal of cutter moving mechanism and carries out fixed point cutting, reaction time is shorter, realize the uniformity of the interval of cutting at every turn, make the pole piece length that cuts out at every turn even, shearing efficiency has been promoted effectively, and through the synchronous effect of 2 different effort, the instantaneous impact force that produces the pole piece can be less, make the pole piece cut more stable, the cutting mouth quality is good.

Example 2

This embodiment is a further preferred implementation of embodiment 1, in which: the driving motor 31 is a servo motor.

Example 3

This embodiment is a further preferred implementation of embodiment 1, in which: the fixed cutter seat 16 is arranged right above the guide groove 24, a avoidance groove matched with the shape of the cam follower block 14 is arranged at the bottom of the fixed cutter seat 16, and the cam follower block 14 movably passes through the avoidance groove and is connected with the bottom of the movable cutter seat 11. Due to the design of the avoidance groove, the cam follower block 14 occupies smaller external space and does not influence the function of the fixed cutter seat 16, and the cam follower block 14 passes through the avoidance groove but does not contact with the avoidance groove, so that the structural layout of the whole device is more reasonable.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The utility model provides a pole piece shearing mechanism, its characterized in that includes cutter mechanism (1), cam drive subassembly (2) and is used for driving cam drive subassembly (2) overall movement's stroke stack subassembly (3), cutter mechanism (1) include stationary knife subassembly (15) and with stationary knife subassembly (15) cooperation effect move knife subassembly (10), move one end of knife subassembly (10) with cam drive subassembly (2) sliding connection, cam drive subassembly (2) are connected the one end of stroke stack subassembly (3).

2. The pole piece shearing device according to claim 1, wherein the stroke superposition assembly (3) comprises a driving motor (31), a rotating disc (32), a first roller (34) and a driven structure connected with the cam driving assembly (2), an output shaft of the driving motor (31) is fixedly connected with the center of the bottom surface of the rotating disc (32), the top surface of the rotating disc (32) comprises a cam (321) positioned in the center and a fixed ring seat (322) arranged around the cam (321), an annular groove (323) surrounding the cam (321) is formed between the fixed ring seat (322) and the cam (321), and one end of the first roller (34) is slidably connected in the annular groove (323), and the other end of the first roller is fixedly connected with the driven structure.

3. Pole piece shearing device according to claim 2, characterized in that the driven structure comprises a connecting plate (33) and sliding rails (36) fixed on an external large plate, two opposite sides of the top surface of the connecting plate (33) are respectively and fixedly provided with mutually parallel sliding blocks, the sliding blocks are in sliding connection with the sliding rails (36), the first rollers (34) are fixedly connected onto the connecting plate (33), and one side, adjacent to 2 sliding blocks, of the connecting plate (33) is connected with the cam driving assembly (2).

4. A pole piece shearing device as claimed in claim 3, characterized in that the slide rail (36) is a linear slide rail (36).

5. A pole piece shearing device according to claim 3, characterized in that the cam driving assembly (2) comprises a cylinder seat (21), a lifting cylinder (22), a second roller (25) and a sliding seat (23), the cylinder seat (21) is fixedly connected with one side of the connecting plate (33) through a connecting block (37) arranged, a cylinder body of the lifting cylinder (22) is fixedly arranged on the cylinder seat (21), a piston rod of the lifting cylinder (22) is connected with the bottom of the sliding seat (23), a guide groove (24) serving as a moving path of the second roller (25) is formed in the top of the sliding seat (23), an arc-shaped part (26) protruding towards one side far away from the fixed cutter assembly (15) is arranged on the guide groove (24), the second roller (25) is slidably connected in the guide groove (24), and the top end of the second roller (25) is connected with the movable cutter assembly (10).

6. Pole piece shearing device according to claim 5, characterized in that the connection block (37) is connected perpendicularly to the connection plate (33) to form an L-shaped structure.

7. The pole piece shearing device according to claim 5, wherein the fixed cutter assembly (15) comprises a fixed cutter seat (16) and a fixed cutter head (17) arranged on one side of the fixed cutter seat (16), the movable cutter assembly (10) comprises a movable cutter seat (11), a movable cutter head (12) arranged on one side of the movable cutter seat (11) and opposite to the fixed cutter head (17), and a cam follower block (14) capable of driving the movable cutter head (12) to move towards the fixed cutter head (17), guide posts (13) are respectively arranged at two ends of one side of the movable cutter seat (11) opposite to the fixed cutter seat (16), the end portions of the guide posts (13) are movably inserted into guide holes correspondingly arranged on the fixed cutter seat (16), and one end of the cam follower block (14) is connected with the bottom of the movable cutter seat (11), and the other end of the cam follower block is fixedly connected with the second roller (25).

8. Pole piece shearing device according to claim 7, characterized in that the telescoping direction of the lifting cylinder (22) is mutually perpendicular to the guide post (13), and the sliding rail (36) is mutually parallel to the guide post (13).

9. The pole piece shearing device according to claim 7, wherein the fixed cutter seat (16) is arranged right above the guide groove (24), a avoidance groove matched with the cam follower block (14) in shape is formed in the bottom of the fixed cutter seat (16), and the cam follower block (14) movably penetrates through the avoidance groove and is connected with the bottom of the movable cutter seat (11).

10. Pole piece shearing device according to claim 2, characterized in that the drive motor (31) is a servo motor.