Edge cutting device for protective net of filter
By designing a filter protective mesh edge cutting device including telescopic columns and springs, the problem of plastic deformation caused by the inability to synchronously adjust the workpiece in the prior art is solved, flexible fixation and synchronous adjustment are realized, and plastic deformation of the workpiece is avoided.
Patent Information
- Application Number
- CN202411852644.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-02-25
AI Technical Summary
The existing filter protective mesh edge cutting device cannot be adjusted synchronously due to rigid fixation, resulting in plastic deformation.
A filter protective mesh edge cutting device consisting of a bracket, a workbench, a pillar, a hydraulic cylinder, a moving plate, a cutter, a fixing mechanism, etc. is designed. Through the combination of telescopic columns and springs, flexible fixation and synchronous adjustment of the workpiece are achieved.
It effectively avoids plastic deformation of the workpiece during edge cutting processing, reduces rigid damage to the workpiece by fixing pressure, and achieves flexible fixation and synchronous adjustment.
Smart Images
Figure CN119501185A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of filter processing, and in particular to a filter protection net trimming device. Background Art
[0002] The filter of a car is an important filtering component, which is responsible for filtering impurities in engine oil and gasoline, maintaining the lubricating fluid of rotating parts inside the engine and gearbox clean, and preventing wear. A protective net will be wrapped around the outside of the filter, which is a mesh structure made of metal. During the production and processing process, the side of the filter protective net needs to be trimmed to cut off excess metal materials and maintain the neatness of the side of the filter protective net, which is convenient for subsequent assembly or processing. In the prior art, the filter protective net trimming device uses a hydraulic cylinder to drive the cutter to drop and cut the filter protective net straight. During the downward pressing process of the cutter, since the cutter itself has a certain thickness, during the vertical downward movement, when cutting the protective net, since the protective net is fixed at one end and cannot move, the cutter will generate a thrust on the protective net as a whole toward the fixed end, and then produce a certain plastic deformation on the protective net as a whole, thereby affecting the plastic deformation of the metal protective net. In the prior art, the fixing of the filter protective net is generally rigid, and the protective net cannot be adjusted at the same time, which is in urgent need of improvement. Summary of the invention
[0003] The present invention provides a filter protection net trimming device, which solves the problem in the related art that the workpiece cannot be adjusted synchronously due to rigid fixation, resulting in plastic deformation.
[0004] The technical solution of the present invention is as follows: a filter protection net trimming device, comprising a bracket, a workbench and a pillar, the top of the workbench is provided with a cutting groove, the top of the pillar is provided with a top plate, the top of the top plate is provided with a hydraulic cylinder, a movable plate is provided at the telescopic end of the hydraulic cylinder, a mounting plate and a cutting knife are fixedly provided on the right side of the movable plate, two sets of fixing mechanisms are fixedly provided at the bottom of the movable plate, and two sets of racks cooperating with the fixing mechanisms are fixedly provided; The fixing mechanism includes three groups of accommodating columns, the internal movably sleeved with springs and telescopic columns, the bottom end of the telescopic column is fixedly connected to a moving frame, a rotating shaft is rotatably installed inside the moving frame, a fixing cylinder is fixedly installed in the middle of the outer surface of the rotating shaft, a buffer sleeve is sleeved on the outer surface of the fixing cylinder, gear two is fixedly installed on the front and rear ends of the outer surface of the rotating shaft, gear one located above the gear two is rotatably installed on the front and rear sides of the moving frame, the gear one is meshed with the gear two, and the rack is located on the left side of the gear one and is in a meshing position with the rack.
[0005] Preferably, the cross-sectional shape of the telescopic column is "T"-shaped, the top end of the telescopic column is limitedly installed on the bottom of the inner wall of the accommodating column, and the two ends of the spring are elastically connected to the accommodating column and the telescopic column respectively.
[0006] Preferably, the centers of the gear one and the gear two are located on the same vertical line, and the diameter of the gear one is smaller than the diameter of the gear two.
[0007] Preferably, the cutter is made of low-carbon alloy steel, and is fixedly mounted on the bottom of a mounting plate by bolts. A groove is provided at the bottom of the mounting plate, and the cutter is adapted to be inserted into the groove.
[0008] Preferably, the distance between the bottom of the cutter and the bottom of the outer surface of the fixed cylinder is smaller than the minimum distance for the rack to be connected and meshed with the gear one, and the rack is arranged in four groups and is evenly divided symmetrically front and back.
[0009] Preferably, a slot is provided in the middle of the outer surface of the fixing tube, the buffer sleeve is fixed in the slot by gluing, and the buffer sleeve is made of a rubber block.
[0010] Preferably, the outer surface of the buffer sleeve is further provided with a plurality of groups of protrusions, and the plurality of groups of protrusions are distributed at equal angles on the outer surface of the buffer sleeve.
[0011] Preferably, the projection is made of hard rubber, and the shape of the projection is a rounded rectangle.
[0012] Preferably, a guide is fixedly installed on the top of the workbench, and the distance between two groups of the guides decreases along the transport direction.
[0013] Preferably, guide columns are fixedly mounted on the top of the movable plate and the mounting plate, and the top ends of the guide columns are adapted to penetrate upward to the top of the top plate.
[0014] The working principle and beneficial effects of the present invention are: 1. This device has been redesigned and optimized to achieve functions such as flexible fixation and synchronous adjustment of the workpiece. A telescopic column is movably sleeved inside the accommodating column, and a spring is elastically connected to the top of the telescopic column. When the hydraulic cylinder drives the movable plate and the accommodating column to move downward, the movable frame, the rotating shaft and the fixed cylinder are driven to move downward and abut against the workpiece. Subsequently, the telescopic column is stopped from moving by the support limit of the workpiece and the workbench. Subsequently, the movable plate continues to move downward to continuously compress the spring, generating a downward elastic force for applying pressure to the workpiece and generating friction to fix the workpiece. Since the fixed cylinder and the rotating shaft are rotatably installed in the movable frame, when the fixed cylinder, the buffer sleeve and the protrusion continuously apply pressure to the workpiece, the force exerted on the workpiece is flexible, which provides conditions for synchronous adjustment during fixation and reduces the rigid damage to the workpiece caused by the fixing pressure.
[0015] 2. Then, a rack fixed to the movable plate is provided, which meshes with gear one after the cutter cuts the workpiece. While the cutter continues to move down to cut the workpiece, the rack drives gear one to rotate, and transmits the power in two stages through gear two, driving the fixed cylinder to rotate clockwise, and utilizing the extrusion of the buffer sleeve and the protrusion on the workpiece to generate an additional horizontal left friction force on the workpiece. On the one hand, the additional friction force offsets the rightward pulling force generated by the cutter on the workpiece when cutting the workpiece, and on the other hand, the friction force generated to the left makes way for the part of the fixed side of the workpiece, thereby preventing the cutter from generating a rigid pressure to the left during cutting, thereby avoiding plastic deformation inside the workpiece during trimming.
[0016] 3. Finally, the friction between the buffer sleeve and the workpiece is enhanced by using the protrusions arranged on the outer surface of the buffer sleeve. The diameter of gear one is smaller than the diameter of gear two, so that the vertical movement stroke of the rack is converted into a smaller fixed cylinder rotation stroke, reducing the displacement of the workpiece caused by the rotation of the fixed cylinder. When the fixed cylinder, the buffer sleeve and the protrusion are driven and rotated by gear two, gear one and the rack, the role of the protrusion is to use its raised design to reduce the contact area with the workpiece and increase the pressure on the contact surface of the workpiece, so as to overcome the potential defect of the workpiece being offset due to insufficient fixing pressure generated by flexible fixation. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] Figure 1 It is a schematic diagram of the front appearance of the structure of the present invention; Figure 2 It is a schematic diagram of the side appearance of the structure of the present invention; Figure 3 It is a front cutaway schematic diagram of the structure of the present invention; Figure 4 For the present invention Figure 3 A magnified schematic diagram of the structure at center A; Figure 5 It is a structural schematic diagram of the hydraulic cylinder, the movable plate, the guide column, the mounting plate, the cutter, the rack, the accommodating column, the telescopic column, the movable frame, the first gear, the rotating shaft, the second gear, the fixing cylinder, the buffer sleeve and the protrusion of the present invention; Figure 6 It is a side cutaway schematic diagram of the movable plate, the accommodating column, the spring, the telescopic column, the movable frame, the gear 1, the rotating shaft, the gear 2, the fixing cylinder, the buffer sleeve and the protrusion of the present invention; Figure 7 It is a schematic diagram of the separation of the rack, the accommodating column, the spring, the telescopic column, the moving frame, the first gear, the rotating shaft, the second gear, the fixing cylinder, the buffer sleeve and the protrusion of the present invention; Figure 8It is a side perspective schematic diagram of the structure of the present invention.
[0019] In the figure: 1. bracket; 2. workbench; 3. guide; 4. cutting groove; 5. pillar; 6. top plate; 7. hydraulic cylinder; 8. moving plate; 9. guide column; 10. mounting plate; 11. cutter; 12. rack; 13. containing column; 14. spring; 15. telescopic column; 16. moving frame; 17. gear 1; 18. rotating shaft; 19. gear 2; 20. fixing cylinder; 21. slot; 22. buffer sleeve; 23. bump. DETAILED DESCRIPTION
[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] Embodiment 1: A filter protection net trimming device comprises a bracket 1, a workbench 2 and a support 5, a cutting groove 4 is provided on the top of the workbench 2, a top plate 6 is installed on the top of the support 5, a hydraulic cylinder 7 is installed on the top of the top plate 6, a moving plate 8 is installed on the telescopic end of the hydraulic cylinder 7, a mounting plate 10 and a cutting knife 11 are fixedly installed on the right side of the moving plate 8, two sets of fixing mechanisms are installed on the bottom of the moving plate 8, and two sets of racks 12 matched with the fixing mechanisms are fixedly installed; The fixing mechanism includes three groups of accommodating columns 13, the internal movably sleeved springs 14 and telescopic columns 15 of the accommodating columns 13, the bottom end of the telescopic columns 15 is fixedly connected to a mobile frame 16, a rotating shaft 18 is rotatably installed inside the mobile frame 16, a fixed cylinder 20 is fixedly installed in the middle of the outer surface of the rotating shaft 18, a buffer sleeve 22 is sleeved on the outer surface of the fixed cylinder 20, a gear 2 19 is fixedly installed at both the front and rear ends of the outer surface of the rotating shaft 18, a gear 1 17 located above the gear 2 19 is rotatably installed on both the front and rear sides of the mobile frame 16, the gear 1 17 is meshed with the gear 2 19, and the rack 12 is located on the left side of the gear 17 and is in a meshing position with the rack 12; The present device has been redesigned and optimized to realize functions such as flexible fixation and synchronous adjustment of the workpiece. By providing a telescopic column 15 movably sleeved inside the accommodating column 13, and elastically connecting the spring 14 to the top of the telescopic column 15, when the hydraulic cylinder 7 drives the movable plate 8 and the accommodating column 13 to move downward, the movable frame 16, the rotating shaft 18 and the fixed cylinder 20 are driven to move downward and abut against the workpiece. Subsequently, the telescopic column 15 is stopped from moving by the support limit of the workpiece and the workbench 2. Subsequently, the movable plate 8 continues to move downward to continuously compress the spring 14, generating a downward elastic force for applying pressure to the workpiece and generating friction to fix the workpiece. Since the fixed cylinder 20 and the rotating shaft 18 are rotatably installed in the movable frame 16, when the fixed cylinder 20, the buffer sleeve 22 and the protrusion 23 continuously apply pressure to the workpiece, the force exerted on the workpiece is flexible, which provides conditions for synchronous adjustment during fixation and reduces the rigid damage of the fixing pressure to the workpiece.
[0022] Then, by providing a rack 12 fixed to the movable plate 8, after the cutter 11 cuts the workpiece, it meshes with the gear 17. While the cutter 11 continues to move down to cut the workpiece, the rack 12 drives the gear 17 to rotate, and transmits the power through the gear 2 19 in two stages, driving the fixed cylinder 20 to rotate clockwise, and utilizing the extrusion of the workpiece by the buffer sleeve 22 and the protrusion 23 to generate an additional horizontal leftward friction force on the workpiece. On the one hand, the additional friction force offsets the rightward pulling force generated by the cutter 11 when cutting the workpiece, and on the other hand, the friction force generated to the left makes way for the part of the fixed side of the workpiece, thereby preventing the cutter 11 from generating a rigid pressure to the left during cutting, thereby avoiding plastic deformation inside the workpiece during trimming.
[0023] Finally, the friction between the buffer sleeve 22 and the workpiece is enhanced by using the protrusion 23 arranged on the outer surface of the buffer sleeve 22. The diameter value of the gear 17 is smaller than the diameter value of the gear 2 19, so that the vertical movement stroke of the rack 12 is converted into a smaller rotation stroke of the fixed cylinder 20, thereby reducing the displacement of the workpiece caused by the rotation of the fixed cylinder 20. When the fixed cylinder 20, the buffer sleeve 22 and the protrusion 23 are driven and rotated by the gear 2 19, the gear 1 17 and the rack 12, the role of the protrusion 23 is to use its raised design to reduce the contact area with the workpiece and increase the pressure on the contact surface of the workpiece, so as to overcome the potential defect of the workpiece being offset due to insufficient fixing pressure generated by flexible fixation.
[0024] Embodiment 2: The cross-sectional shape of the telescopic column 15 is "T"-shaped, the top end of the telescopic column 15 is limitedly installed at the bottom of the inner wall of the accommodating column 13, and the two ends of the spring 14 are elastically connected to the accommodating column 13 and the telescopic column 15 respectively; like Figure 3As shown, the telescopic column 15 with a "T" shape is suspended at the bottom of the accommodating column 13. The convex part at the top is used to drive the telescopic column 15 to move to the bottom of the inner wall of the accommodating column 13 by gravity before the fixed cylinder 20 contacts the workpiece. When the fixed cylinder 20 contacts the workpiece, the telescopic column 15 no longer moves downward. At this time, the accommodating column 13 moves downward relative to the telescopic column 15 and continuously compresses the spring 14, thereby generating an increasingly large downward elastic force to assist in fixing the workpiece. The advantage of this design is that the gradually increasing elastic force acts as a flexible pressure for fixing the workpiece, which effectively protects the workpiece surface from damage by rigid pressure.
[0025] Embodiment 3: The centers of the gear 1 17 and the gear 2 19 are located on the same vertical line, and the diameter of the gear 1 17 is smaller than the diameter of the gear 2 19; Gear 1 17 and gear 2 19 are meshed. When the movable plate 8 drives the rack 12 to move downward and makes the rack 12 mesh with gear 1 17, gear 2 19 is driven to rotate, and the rotation speed of gear 2 19 is reduced, and the friction force generated by the rotation of the fixed cylinder 20 and the buffer sleeve 22 is controllable.
[0026] Embodiment 4: The cutter 11 is made of low-carbon alloy steel and is fixed to the bottom of the mounting plate 10 by bolts. The bottom of the mounting plate 10 is provided with a groove, and the cutter 11 is adapted to be inserted into the groove. The cutter 11 is made of low-carbon alloy steel, which has extremely high hardness and is very suitable for metal cutting processing. The groove at the bottom of the cutter 11 facilitates the positioning and installation of the cutter 11 when the cutter 11 is replaced and repaired.
[0027] Embodiment 5: The distance between the bottom of the cutter 11 and the bottom of the outer surface of the fixed cylinder 20 is less than the minimum distance between the rack 12 and the gear 17 for connection and meshing. The rack 12 is arranged in four groups and is evenly divided symmetrically in front and back. like Figure 1 As shown, the fixing cylinder 20, the buffer sleeve 22 and the protrusion 23 first contact the workpiece and fix the workpiece before the cutter 11 reaches the height of the trimming process. The cutter 11 needs to cut the workpiece before the rack 12 meshes with the gear 17. Otherwise, the rack 12 meshes with the gear 17 and drives the gear 2 19 to rotate. The power generated cannot be applied to the synchronous adjustment with the workpiece.
[0028] Embodiment 6: A slot 21 is provided in the middle of the outer surface of the fixing cylinder 20, and a buffer sleeve 22 is fixedly bonded in the slot 21 by gluing, and the buffer sleeve 22 is made of a rubber block; The buffer sleeve 22 is fixed in the clamping groove 21 by gluing. Its soft property can provide buffering and protection to the surface of the workpiece by contacting with the workpiece, and can also increase the friction generated between it and the workpiece.
[0029] Embodiment 7: The outer surface of the buffer sleeve 22 is also provided with a plurality of groups of protrusions 23, and the plurality of groups of protrusions 23 are distributed at equal angles on the outer surface of the buffer sleeve 22; The protrusion of the bump 23 can further increase the friction and fixing pressure on the workpiece, and the pressure at the contact point between the bump 23 and the workpiece surface is increased, thereby making the workpiece more stably fixed.
[0030] Embodiment 8: The protrusion 23 is made of hard rubber, and the shape of the protrusion 23 is a rounded rectangle; The rounded rectangular shape of 24 allows it to be pressed against the surface of the workpiece when it is driven to rotate by the buffer sleeve 22 and the fixed cylinder 20, thereby increasing the friction force.
[0031] Embodiment 9: A guide 3 is fixedly installed on the top of the workbench 2, and the distance between two groups of guides 3 decreases along the transport direction; The guide 3 is used to limit and guide the workpiece when it is transported to a fixed position on the surface of the workbench 2, so that the workpiece can be automatically positioned.
[0032] Embodiment 10: The tops of the movable plate 8 and the mounting plate 10 are fixedly mounted with guide posts 9, and the top ends of the guide posts 9 are adapted to penetrate upward to the top of the top plate 6; The guide column 9 is fixedly connected to the movable plate 8 and the mounting plate 10. When the hydraulic cylinder 7 drives the movable plate 8 to move downward, the guide column 9 provides guidance therefor to ensure that the device runs more stably.
[0033] Working principle: When the device is working, the workpiece is placed on the top of the workbench 2 and pushed to the right, and moved to the processing position under the limiting guiding action of the guide 3: First, the hydraulic cylinder 7 is started, and the movable plate 8, the mounting plate 10, the cutter 11 and the accommodating column 13 are driven to move downward, and the telescopic column 15 drives the movable frame 16, the rotating shaft 18, the fixed cylinder 20, the buffer sleeve 22 and the protrusion 23 to move downward accordingly, and the protrusion 23 and the buffer sleeve 22 first contact the surface of the workpiece, and remain stationary together with the movable frame 16 and the telescopic column 15, and no longer move downward; Then, the moving plate 8, the mounting plate 10 and the cutter 11 continue to move downward. At this time, the bottom of the cutter 11 has not yet touched the surface of the workpiece. Since the telescopic column 15 no longer moves downward, the accommodating column 13 continues to compress the accommodating column 13 by continuing to move downward, and generates a downward rebound force, and presses the workpiece downward through the moving frame 16, the rotating shaft 18, the buffer sleeve 22 and the protrusion 23, and the pressure for fixing is getting greater and greater. At this time, the buffer sleeve 22 cannot rotate, and its movement trajectory is vertically downward; Then, the movable plate 8 drives the mounting plate 10, the cutter 11 and the rack 12 to move downward to the position where the bottom end of the cutter 11 contacts the surface of the workpiece, and the workpiece begins to be cut. After the cutter 11 cuts into the workpiece, the lowest end of the rack 12 begins to move to a height that meshes with the gear 17, while the cutter 11 trims the workpiece. At the same time, the rack 12 moves vertically downward and drives the gear 17 to rotate synchronously in a counterclockwise direction. Therefore, the gear 2 19 meshing with it rotates clockwise, and then drives the rotating shaft 18, the fixed cylinder 20, the buffer sleeve 22 and the protrusion 23 to rotate clockwise. At this time, the buffer sleeve 22 and the protrusion 23 generate a friction force to the left (i.e., the direction opposite to the workpiece transportation direction) to the workpiece by reversing. When the cutter 11 cuts the workpiece, the pressure generated on the fixed side of the workpiece is offset by the friction force. Since the workpiece will generate pressure on the left and right sides when being cut, and the friction force drives the workpiece to move synchronously, the workpiece will not be plastically deformed due to the extrusion of the cutter 11. Finally, the cutter 11 cuts the groove 4, the workpiece completes the edge cutting, the movable plate 8 stops moving, the buffer sleeve 22 and the protrusion 23 no longer rotate, at this time, start the hydraulic cylinder 7 and drive the movable plate 8, the mounting plate 10 and the cutter 11 to move upward and reset, the rack 12 engages with the direction of the gear 17, so that the buffer sleeve 22 reverses the same distance, and then disengages from the surface of the gear 17, the movable plate 8 drives the accommodating column 13 to move upward, and gradually reduces the compression degree of the spring 14 until the spring 14 is fully restored, and finally, the accommodating column 13 drives the telescopic column 15 and the movable frame 16 to move upward to the initial position.
[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A filter protection net trimming device, comprising a bracket (1), a workbench (2) and a support (5), wherein a cutting groove (4) is provided on the top of the workbench (2), a top plate (6) is installed on the top of the support (5), a hydraulic cylinder (7) is installed on the top of the top plate (6), and a movable plate (8) is installed on the telescopic end of the hydraulic cylinder (7), characterized in that: A mounting plate (10) and a cutter (11) are fixedly mounted on the right side of the movable plate (8); two sets of fixing mechanisms are mounted on the bottom of the movable plate (8), and two sets of racks (12) that cooperate with the fixing mechanisms are fixedly mounted; The fixing mechanism comprises three groups of accommodating columns (13), the interior of the accommodating columns (13) being movably sleeved with springs (14) and telescopic columns (15), the bottom end of the telescopic columns (15) being fixedly connected with a moving frame (16), the interior of the moving frame (16) being rotatably mounted with a rotating shaft (18), a fixing cylinder (20) being fixedly mounted in the middle of the outer surface of the rotating shaft (18), the outer surface of the fixing cylinder (20) being sleeved with a buffer sleeve (22), the front and rear ends of the outer surface of the rotating shaft (18) being fixedly mounted with a gear 2 (19), the front and rear sides of the moving frame (16) being rotatably mounted with a gear 1 (17) located above the gear 2 (19), the gear 1 (17) being meshed with the gear 2 (19), the rack (12) being located on the left side of the gear 1 (17) and being in a meshing position with the rack (12).
2. A filter protection net trimming device according to claim 1, characterized in that: The cross-sectional shape of the telescopic column (15) is "T"-shaped, the top end of the telescopic column (15) is limitedly mounted on the bottom of the inner wall of the accommodating column (13), and the two ends of the spring (14) are elastically connected to the accommodating column (13) and the telescopic column (15) respectively.
3. A filter protection net trimming device according to claim 2, characterized in that: The centers of the circles of the gear 1 (17) and the gear 2 (19) are located on the same vertical line, and the diameter of the gear 1 (17) is smaller than the diameter of the gear 2 (19).
4. A filter protection net trimming device according to claim 3, characterized in that: The cutter (11) is made of low-carbon alloy steel, and is fixedly mounted on the bottom of a mounting plate (10) by means of bolts; a groove is provided on the bottom of the mounting plate (10), and the cutter (11) is adapted to be inserted into the groove.
5. A filter protection net trimming device according to claim 4, characterized in that: The distance between the bottom of the cutter (11) and the bottom of the outer surface of the fixed cylinder (20) is less than the minimum distance for the rack (12) to be connected and meshed with the gear one (17), and the rack (12) is arranged in four groups and is evenly divided symmetrically in front and back.
6. A filter protection net trimming device according to claim 5, characterized in that: A clamping groove (21) is provided in the middle of the outer surface of the fixing cylinder (20), and the buffer sleeve (22) is fixedly bonded in the clamping groove (21) by gluing.
7. A filter protection net trimming device according to claim 6, characterized in that: The outer surface of the buffer sleeve (22) is further provided with a plurality of groups of protrusions (23), and the plurality of groups of protrusions (23) are distributed at equal angles on the outer surface of the buffer sleeve (22).
8. The filter protection net trimming device according to claim 7, characterized in that: The convex block (23) is made of hard rubber, and the shape of the convex block (23) is a rounded rectangle.
9. A filter protection net trimming device according to claim 8, characterized in that: A guide (3) is fixedly mounted on the top of the workbench (2), and the distance between two groups of the guides (3) decreases along the transport direction.
10. A filter protection net trimming device according to claim 9, characterized in that: A guide column (9) is fixedly mounted on the top of each of the movable plate (8) and the mounting plate (10), and the top end of the guide column (9) is adapted to penetrate upward to the top of the top plate (6).