A linkage mechanism for a disc shear

Abstract

A kind of linkage mechanism for disc shear cutter box, for metallurgical equipment technical field.The upper bearing seat is rotatably connected between the lower bearing seat by left eccentric shaft, right upper eccentric shaft is rotatably connected in the upper bearing seat, right lower eccentric shaft is rotatably connected in the lower bearing seat, the two sides of right upper eccentric shaft, right lower eccentric shaft are connected by swing arm respectively, the two ends of articulated bolt are connected with the upper bearing seat and the lower bearing seat respectively;Right upper eccentric shaft, right lower eccentric shaft, left eccentric shaft form three fulcrums, with swing arm, articulated bolt to form crank connecting rod mechanism, realize the simultaneous adjustment of upper and lower blade side gap and overlap amount.The control system of the utility model is one-key intelligent linkage, and double-parameter adjustment can be completed by single operation, and the optimal parameter combination can be automatically recommended according to strip thickness and material quality, realize "zero trial and error" production, can replace the cumbersome process of traditional separate adjustment of side gap and overlap amount, reduce manual intervention, operation difficulty is greatly reduced, maintenance is convenient, and shearing efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of metallurgical equipment technology, specifically a linkage mechanism for a disc shear box. Background Technology

[0002] The disc shear box is the core component of the disc shearing machine. Disc shearing machines are used in the field of metal strip processing to continuously shear moving metal strips longitudinally. Its main functions are to remove irregular edges on both sides of the strip to ensure strip width accuracy; remove edge defects to improve strip edge quality; and provide qualified strip width for subsequent processes.

[0003] The working principle of a disc shearing machine: Two disc blades move in a continuous circular motion at the same speed as the strip, forming a shearing line without end points, and precisely cutting the edge of the strip to the set width.

[0004] The core structure of the disc shearing machine includes: Frame assembly: providing rigid support for the welded blade box; Blade box assembly: a symmetrical cantilever structure with upper and lower blade shafts mounted separately; Transmission system: dual motors independently driven, transmitting power through a ball cage coupling and an overrunning clutch; Shearing system: including upper and lower blade shafts, disc blades, and locking device; Adjustment mechanism: including side clearance adjustment, overlap adjustment, and opening adjustment devices; Auxiliary system: including waste edge chute, deburring device, and lubrication system.

[0005] Key parameters: Applicable strip thickness: ≤0.2~3mm Cutting edge width: minimum 5mm, maximum 40mm per side Blade diameter: standard specification approximately Φ407mm Blade thickness: Approximately 45mm Axial runout of the cutter shaft: ≤0.01mm Cutter head end face runout: ≤0.02mm Work mode: Powered shearing: The cutter shaft is driven by a motor to rotate actively, and the strip is pulled into the shearing zone.

[0006] Shear cutter: The cutter shaft has no active drive; it is rotated by the movement of the strip. It is suitable for thin strips.

[0007] Application areas: Metal processing industry: Cold-rolled strip steel production line: including finishing, cross-cutting, and recoiling units; Hot-rolled strip steel production line: including pickling units; Non-ferrous metal processing industry: including copper strip and aluminum strip production; Specialty materials processing industry: including the processing of electrical steel, silicon steel, and stainless steel; Other industries: Automobile manufacturing: body panel processing; Shipbuilding and aerospace: high-precision panel processing; Home appliance manufacturing: panel material processing.

[0008] Key technologies: 1. Shear blade side clearance and overlap control technology Side clearance (Δ): The distance between the sides of the upper and lower blades, which directly affects the shearing quality: Soft steel: Δ=(5~10)%×plate thickness; Hard steel: Δ=(10~20)%×plate thickness; Overlap (s): The amount of overlap of the upper and lower blades in the axial direction is generally taken as 1 / 3 to 1 / 2 of the plate thickness; For thick plates (>5mm), it can be set to a negative value (reverse overlap).

[0009] Traditional adjustment methods: Side clearance adjustment: fine adjustment of the upper tool shaft position through a wedge mechanism or eccentric shaft; Overlap adjustment: achieved by rotating the lower tool shaft eccentric sleeve through a worm gear pair.

[0010] 2. Transmission and Synchronization Technology Dual-motor independent drive: Overcomes the synchronization problem of single-motor split-shaft gearbox transmission. Each of the left and right tool boxes is equipped with an independent variable frequency motor, with a built-in encoder to monitor the speed in real time; The control system achieves precise synchronization of the two tool shaft speeds with an error of <0.05%. Overrunning clutch: Automatically cuts off motor power in pull-shear mode to prevent motor reversal.

[0011] 3. Tool locking and replacement technology Hydraulic nut locking: High-pressure oil is used to stretch the screw to generate preload, ensuring the stability of the blade during high-speed shearing. Its advantages are that the preload is uniform and reliable, far exceeding manual tightening. Blade material: Commonly used special steels such as Cr12Mo1V1 and HSS.

[0012] 4. Tool box rigidity enhancement technology Box-type welded base: stress is relieved by annealing to reduce deformation; Composite bearing configuration: front end of the cutter shaft: double row cylindrical roller bearing (bearing radial force); rear end: paired angular contact ball bearing (bearing axial force).

[0013] Anti-tipping design: Enhances the stability of the blade box and prevents it from shifting during shearing; Advantages of existing technology: It can achieve continuous high-speed shearing, resulting in high production efficiency; it has high shearing precision and good edge quality; it can adapt to strips of various materials and thicknesses; and it continuously improves the degree of automation, reducing manual intervention.

[0014] Disadvantages: High cost of cutting tools, rapid wear, and frequent replacement; complex adjustment of side clearance and overlap, requiring professional skills; complex equipment structure, making maintenance difficult; strip deviation is prone to occur during high-speed shearing; domestic equipment still lags behind international advanced levels in terms of precision and stability. Summary of the Invention

[0015] To overcome the shortcomings of the prior art, the purpose of this invention is to provide a linkage mechanism for a disc scissor box, so as to achieve simultaneous automatic adjustment of side clearance and overlap.

[0016] To achieve the above-mentioned objectives, the linkage mechanism for a disc scissor box of this invention has an upper bearing seat and a lower bearing seat rotatably connected by a left eccentric shaft, an upper right eccentric shaft rotatably connected inside the upper bearing seat, and a lower right eccentric shaft rotatably connected inside the lower bearing seat. The two ends of the upper right eccentric shaft and the lower right eccentric shaft are respectively connected by a swing arm, and the two ends of the hinge bolt are respectively connected to the upper bearing seat and the lower bearing seat. The upper right eccentric shaft, the lower right eccentric shaft, and the left eccentric shaft form three fulcrums, which, together with the swing arm and the hinge bolt, constitute a crank-connecting rod mechanism to achieve simultaneous adjustment of the side clearance and overlap of the upper and lower blades.

[0017] Furthermore, the upper cutter shaft portion of the disc shear box includes an upper cutter shaft and an upper bearing housing. The upper cutter shaft is positioned by two sets of short cylindrical bearings, one set of double-row angular contact ball bearings, and adjusting washers. The right end of the upper cutter shaft is locked with a locking cap. Sealing caps are provided on both the left and right sides of the upper cutter shaft to prevent grease leakage and external impurities from entering. The left end of the upper cutter shaft is equipped with a blade, a blade pad, a spacer, and a hydraulic nut. The blade is axially positioned by the hydraulic nut, and the radial direction of the blade is clearance-fitted with the upper cutter shaft and connected by a key. To prevent the blade from rotating, the lower cutting shaft section includes a lower cutting shaft and a lower bearing housing. The lower cutting shaft is positioned by two sets of short cylindrical bearings, one set of double-row angular contact ball bearings, and adjusting washers. The right end of the lower cutting shaft is locked with a locking cover. Sealing covers are provided on both sides of the lower cutting shaft to prevent grease leakage and external impurities from entering the lower cutting shaft. The left end of the lower cutting shaft is equipped with a blade, a blade pad, a spacer, and a hydraulic nut. The blade is axially positioned by the hydraulic nut. The radial direction of the blade is clearance-fitted with the upper cutting shaft and connected by a key to prevent the blade from rotating.

[0018] Furthermore, the upper bearing housing and the left side of the lower bearing housing are connected by the middle of the left eccentric shaft. Copper sleeves are respectively provided between the middle two sides of the left eccentric shaft and the upper and lower bearing housings. The transmission end of the left eccentric shaft is equipped with an overlap adjustment servo motor for adjusting the overlap of the upper and lower blades. The overlap adjustment servo motor is equipped with an encoder. The left eccentric shaft is keyed to the output end of the overlap adjustment servo motor. The left dial is installed at the front end of the left eccentric shaft. The eccentricity L1 between the middle axis of the left eccentric shaft and the axis of the two journals is 0.6mm. The two journals of the left eccentric shaft are fitted into the ear holes at both ends of the upper and lower bearing housings through the gap of the copper sleeves.

[0019] Furthermore, the bottom surfaces of the lower bearing housing are positioned and connected to the base frame of the disc scissor box via keys, while the upper bearing housing is floatingly connected to the base frame of the disc scissor box.

[0020] Furthermore, the upper right eccentric shaft is rotatably connected to the right side of the upper bearing housing. Copper sleeves are provided between the two sides of the middle part of the upper right eccentric shaft and the upper bearing housing. One end of each of the two swing arms is connected to the two ends of the upper right eccentric shaft with bolts, and the other end of each of the two swing arms is connected to the two ends of the lower right eccentric shaft with bolts. The angle between the swing arms and the horizontal direction is 45°. The eccentricity L2 between the center of the middle part of the upper right eccentric shaft and the center of the two journals is 3mm. The two journals of the upper right eccentric shaft are fitted into the ear holes at both ends of the upper bearing housing through the gap of the copper sleeves.

[0021] Furthermore, the lower right eccentric shaft is rotatably connected to the right side of the lower bearing housing. Copper sleeves are provided between the middle two sides of the lower right eccentric shaft and the journals on both sides and the lower bearing housing. The right dial is keyed to the front end of the lower right eccentric shaft. The eccentricity L3 between the middle axis of the lower right eccentric shaft and the axis of the journals on both sides is 4mm. The journals on both sides of the lower right eccentric shaft are fitted into the ear holes at both ends of the lower bearing housing through the gap of the copper sleeves. The transmission end of the lower right eccentric shaft is equipped with a side clearance adjustment servo motor for adjusting the side clearance of the upper and lower blades. The side clearance adjustment servo motor is equipped with an encoder. The lower right eccentric shaft is keyed to the output end of the side clearance adjustment servo motor.

[0022] Furthermore, there are two hinge bolts, one end of which is threaded to the upper bearing seat and locked with a stacked spring washer spacer and double nuts. The ball head end of the two hinge bolts is connected to the lower bearing seat by a pin, and the upper bearing seat can rotate around the pin at the ball head end of the hinge bolt.

[0023] Furthermore, the pointer of the left dial on the left eccentric shaft is fixedly connected to the lower bearing seat via a pointer seat.

[0024] Furthermore, the pointer two of the right dial on the lower right eccentric shaft is fixedly connected to the lower bearing seat through the pointer seat two.

[0025] When adjusting the side clearance and overlap of the upper and lower blades, this invention, based on the side clearance parameters required by the shearing machine, drives the side clearance adjustment servo motor to rotate the lower right eccentric shaft. According to the side clearance parameters, the rotation of the lower right eccentric shaft aligns the side clearance scale on the right dial with pointer two. Simultaneously, the upper right eccentric shaft also moves, pulling the upper bearing seat upwards or downwards, causing the upper bearing seat to rotate around the pin on the ball head end of the hinge bolt and the lower right eccentric shaft, creating the required clearance between the upper and lower blades. Based on the overlap parameters required by the shearing machine, the control system simultaneously drives the overlap adjustment servo motor to rotate the left eccentric shaft. According to the overlap parameters, the rotation of the left eccentric shaft aligns the overlap scale on the left dial with pointer one. This achieves the simultaneous and coordinated adjustment of the side clearance and overlap of the upper and lower blades.

[0026] Compared with the prior art, this utility model uses three fulcrums—upper right eccentric shaft, lower right eccentric shaft, and left eccentric shaft—to form a crank-connecting rod mechanism together with the swing arm and hinge bolt. This mechanism can simultaneously and automatically adjust the side clearance and overlap of the cutter, making maintenance convenient and shearing efficiency high. It has the following advantages: 1. The control system features one-button intelligent linkage, allowing for dual-parameter adjustment in a single operation. This replaces the cumbersome process of adjusting side clearance and overlap separately, reducing manual intervention and significantly lowering the difficulty of operation. 2. Parameter adaptive adjustment: The control system can automatically recommend the optimal parameter combination based on the strip thickness and material, achieving "zero trial and error" production; 3. Switching between multiple strip specifications: When the thickness changes, the side gap (5-20% of the plate thickness) and overlap (1 / 3-1 / 2 of the plate thickness) can be adjusted simultaneously with one click, without the need for repeated debugging, and the level of intelligence is significantly improved; 4. Operational efficiency can be increased by 70%, cutting accuracy can be increased by 3-10 times, equipment structure is simplified by 20%, maintenance costs are reduced by 50%, and energy consumption is reduced by 20-30%. Attached Figure Description

[0027] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is the front view of the present invention.

[0028] Figure 2 for Figure 1 The right view.

[0029] Figure 3 for Figure 1 Top view.

[0030] Figure 4 for Figure 2 The CC view.

[0031] Figure 5 for Figure 1 DD view.

[0032] Figure 6 for Figure 1 BB view.

[0033] In the diagram: 1. Upper cutter shaft; 2. Upper bearing housing; 3. Short cylindrical bearing; 4. Double-row angular contact ball bearing; 5. Adjusting washer; 6. Locking gland; 7. Sealing cover; 8. Cutting tool; 9. Tool pad; 10. Spacer; 11. Hydraulic nut; 12. Lower cutter shaft; 13. Lower bearing housing; 14. Upper bearing housing; 15. Lower bearing housing; 16. Hinged bolt; 17. Upper right eccentric shaft; 18. Lower right eccentric shaft; 19. Swing arm; 20. Right dial; 21. Left eccentric shaft; 22. Left dial; 23. Side clearance adjustment servo motor; 24. Overlap adjustment servo motor; 25. Copper sleeve; 26. Pin; 27. Pointer one; 28. Pointer seat one; 29. ​​Pointer two; 30. Pointer seat two. Detailed Implementation

[0034] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, in the linkage mechanism of the disc scissor box of this utility model, the upper bearing seat 14 and the lower bearing seat 15 are rotatably connected by a left eccentric shaft 21, the upper right eccentric shaft 17 is rotatably connected in the upper bearing seat 14, and the lower right eccentric shaft 18 is rotatably connected in the lower bearing seat 15. The two sides of the upper right eccentric shaft 17 and the lower right eccentric shaft 18 are respectively connected by a swing arm 19, and the two ends of the hinge bolt 16 are respectively connected to the upper bearing seat 14 and the lower bearing seat 15. The upper right eccentric shaft 17, the lower right eccentric shaft 18, and the left eccentric shaft 21 form three fulcrums, which together with the swing arm 19 and the hinge bolt 16 constitute a crank-connecting rod mechanism to realize the simultaneous adjustment of the side clearance and overlap of the upper and lower blades 8.

[0037] Preferably, the upper cutter shaft portion of the disc shear box includes a high-precision upper cutter shaft 1 and an upper bearing housing 2. The upper cutter shaft 1 is positioned by two sets of P2-grade short cylindrical bearings 3, one set of P2-grade double-row angular contact ball bearings 4, and adjusting washers 5. The right end of the upper cutter shaft 1 is locked with a locking cap 6. Sealing caps 7 are provided on both the left and right sides of the upper cutter shaft 1 to prevent grease leakage and external impurities from entering the upper cutter shaft 1. The left end of the upper cutter shaft 1 is equipped with a precision blade 8, a blade pad 9, a spacer 10, and a hydraulic nut 11. The blade 8 is axially positioned by the hydraulic nut 11. The radial part of the blade 8 is clearance-fitted with the upper cutter shaft 1 and connected by a key to prevent the blade 8 from being... The lower cutting shaft section includes a high-precision lower cutting shaft 12 and a lower bearing housing 13. The lower cutting shaft 12 is positioned by two sets of P2-grade short cylindrical bearings 3, a set of P2-grade double-row angular contact ball bearings 4, and adjusting washers 5. The right end of the lower cutting shaft 12 is locked with a locking cover 6. Sealing covers 7 are provided on the left and right sides of the lower cutting shaft 12 to prevent grease leakage and external impurities from entering the lower cutting shaft 12. The left end of the lower cutting shaft 12 is equipped with a precision blade 8, a blade pad 9, a spacer 10, and a hydraulic nut 11. The blade 8 is axially positioned by the hydraulic nut 11. The radial direction of the blade 8 is clearance-fitted with the upper cutting shaft 1 and connected by a key to prevent the blade 8 from rotating.

[0038] Preferably, the left sides of the upper bearing housing 14 and the lower bearing housing 15 are connected by the middle of a left eccentric shaft 21. Copper sleeves 25 are respectively provided on both sides of the middle of the left eccentric shaft 21 between the upper bearing housing 14 and the lower bearing housing 15. The left eccentric shaft 21 is axially positioned with the upper bearing housing 14 through the copper sleeves 25. An overlap adjustment servo motor 24 is installed at the transmission end of the left eccentric shaft 21 to adjust the overlap of the upper and lower blades 8. The overlap adjustment servo motor 24 is equipped with an encoder. The output end of the servo motor 24 is keyed, the left dial 22 is keyed to the front end of the left eccentric shaft 21, and the pointer 27 is fixedly connected to the lower bearing seat 15 through the pointer seat 28. The eccentricity L1 between the center axis of the left eccentric shaft 21 and the axis of the two journals is 0.6mm. The two journals of the left eccentric shaft 21 are fitted into the ear holes at both ends of the upper bearing seat 14 and the lower bearing seat 15 through the copper sleeve 25. The left eccentric shaft 21 can rotate between the upper bearing seat 14 and the lower bearing seat 15 with an eccentricity of 0.6mm.

[0039] Preferably, the bottom surfaces of the lower bearing seat 15 are positioned and connected to the base frame of the disc scissor box via keys, and the upper bearing seat 14 is floatingly connected to the base frame of the disc scissor box.

[0040] Preferably, the upper right eccentric shaft 17 is rotatably connected to the right side of the upper bearing seat 14. Copper sleeves 25 are provided between the upper right eccentric shaft 17 and the upper bearing seat 14 on both sides of the middle part. The upper right eccentric shaft 17 is axially positioned with the upper bearing seat 14 through the copper sleeves 25. One end of the two swing arms 19 is connected to the two ends of the upper right eccentric shaft 17 with bolts, and the other end of the two swing arms 19 is connected to the two ends of the lower right eccentric shaft 18 with bolts. The angle between the swing arms 19 and the horizontal direction is 45°. The swing arms 19 are equivalent to the crank in the linkage mechanism and are the core components for realizing the linkage adjustment of the side clearance and overlap of the upper and lower blades 8. The eccentricity L2 between the middle axis of the upper right eccentric shaft 17 and the axis of the two journals is 3mm. The two journals of the upper right eccentric shaft 17 are fitted into the ear holes at both ends of the upper bearing seat 14 through the gap of the copper sleeves 25.

[0041] Preferably, the lower right eccentric shaft 18 is rotatably connected to the right side of the lower bearing seat 15. Copper sleeves 25 are provided on both sides of the middle portion of the lower right eccentric shaft 18, between the journals on both sides and the lower bearing seat 15. The lower right eccentric shaft 18 is axially positioned between itself and the lower bearing seat 15 through the copper sleeves 25. The right dial 20 is keyed to the front end of the lower right eccentric shaft 18. The pointer 29 of the right dial 20 on the lower right eccentric shaft 18 is fixedly connected to the lower bearing seat 15 through a pointer seat 30. The eccentricity L3 between the center of the lower right eccentric shaft 18 and the center of the journals on both sides is 4mm. The journals on both sides of the lower right eccentric shaft 18 are fitted into the ear holes at both ends of the lower bearing seat 15 through the copper sleeve 25. The transmission end of the lower right eccentric shaft 18 is equipped with a side clearance adjustment servo motor 23, which is used to adjust the side clearance of the upper and lower blades 8. The side clearance adjustment servo motor 23 is equipped with an encoder. The lower right eccentric shaft 18 is keyed to the output end of the side clearance adjustment servo motor 23.

[0042] Preferably, there are two hinge bolts 16. One end of the front and rear hinge bolts 16 is connected to the upper bearing seat 14 by threads and locked with stacked spring washers and double nuts. The ball ends of the front and rear hinge bolts 16 are connected to the lower bearing seat 15 by pins 26. The upper bearing seat 14 can rotate around the pins 26 on the ball ends of the hinge bolts 16.

[0043] The procedure for adjusting the clearance and overlap of the upper and lower blades on all eight sides is as follows: (a) Adjust the thickness of the washer 5 according to the side clearance data, and install the short cylindrical bearing 3, double row angular contact ball bearing 4, and sealing cover 7 and other components into place; (b) According to the side clearance parameters of the upper and lower blades 8 required by the shearing machine, the control system drives the side clearance adjustment servo motor 23 to rotate the lower right eccentric shaft 18. According to the side clearance parameters, the lower right eccentric shaft 18 rotates to align the side clearance scale on the right dial 20 with the pointer 29. At the same time, the upper right eccentric shaft 17 also moves, pulling the upper bearing seat 14 upward or downward, so that the upper bearing seat 14 rotates around the pin 26 on the ball end of the hinge bolt 16 and the lower right eccentric shaft 18, so that a gap is generated between the upper and lower blades 8. (c) According to the overlap parameters of the upper and lower blades 8 required by the shearing machine, the control system simultaneously drives the overlap adjustment servo motor 24 to rotate the left eccentric shaft 21. According to the overlap parameters, the left eccentric shaft 21 rotates to align the overlap scale on the left dial 22 with the pointer 27; thus, the purpose of simultaneously adjusting the side clearance and overlap of the upper and lower blades 8 can be achieved. (d) Later, the side clearance and overlap of the upper and lower blades 8 can be adjusted according to the wear of the upper and lower blades 8 and the actual production needs, using the above method.

Claims

1. A linkage mechanism for a disc scissor box, characterized in that: The upper bearing housing (14) and lower bearing housing (15) of the disc shear box are rotatably connected by the left eccentric shaft (21), the upper right eccentric shaft (17) is rotatably connected in the upper bearing housing (14), and the lower right eccentric shaft (18) is rotatably connected in the lower bearing housing (15). The two ends of the upper right eccentric shaft (17) and the lower right eccentric shaft (18) are respectively connected by the swing arm (19), and the two ends of the hinge bolt (16) are respectively connected to the upper bearing housing (14) and the lower bearing housing (15). The upper right eccentric shaft (17), the lower right eccentric shaft (18), and the left eccentric shaft (21) form three fulcrums, which together with the swing arm (19) and the hinge bolt (16) constitute a crank-connecting rod mechanism to realize the simultaneous adjustment of the side clearance and overlap of the upper and lower blades (8).

2. The linkage mechanism for a disc scissor box according to claim 1, characterized in that: The upper cutter shaft of the disc shear box includes an upper cutter shaft (1) and an upper bearing housing (2). The upper cutter shaft (1) is positioned by two sets of short cylindrical bearings (3), a set of double-row angular contact ball bearings (4), and adjusting washers (5). The right end of the upper cutter shaft (1) is locked with a locking cover (6). The left and right sides of the upper cutter shaft (1) are provided with sealing covers (7) to prevent grease leakage and external impurities from entering the upper cutter shaft (1). The left end of the upper cutter shaft (1) is equipped with a blade (8), a blade pad (9), a spacer (10), and a hydraulic nut (11). The blade (8) is axially positioned by the hydraulic nut (11). The radial part of the blade (8) is clearance-fitted with the upper cutter shaft (1) and connected by a key to prevent the blade (8) from rotating. The lower cutting shaft part includes a lower cutting shaft (12) and a lower bearing housing (13). The lower cutting shaft (12) is positioned by two sets of short cylindrical bearings (3), a set of double-row angular contact ball bearings (4), and an adjusting washer (5). The right end of the lower cutting shaft (12) is locked with a locking cover (6). The left and right sides of the lower cutting shaft (12) are provided with sealing covers (7) to prevent grease leakage and external impurities from entering the lower cutting shaft (12). The left end of the lower cutting shaft (12) is equipped with a blade (8), a blade pad (9), a spacer (10), and a hydraulic nut (11). The blade (8) is axially positioned by the hydraulic nut (11). The radial part of the blade (8) is clearance-fitted with the upper cutting shaft (1) and connected by a key to prevent the blade (8) from rotating.

3. The linkage mechanism for a disc scissor box according to claim 1, characterized in that: The upper bearing housing (14) and the lower bearing housing (15) are connected by the middle of the left eccentric shaft (21). The two sides of the middle of the left eccentric shaft (21) are respectively provided with copper sleeves (25) between the upper bearing housing (14) and the lower bearing housing (15). The transmission end of the left eccentric shaft (21) is equipped with an overlap adjustment servo motor (24) for adjusting the overlap of the upper and lower blades (8). The overlap adjustment servo motor (24) is equipped with an encoder. The output end of the left eccentric shaft (21) is keyed to the overlap adjustment servo motor (24). The left dial (22) is keyed to the front end of the left eccentric shaft (21). The eccentricity L1 between the center of the middle shaft of the left eccentric shaft (21) and the center of the two journals is 0.6mm. The two journals of the left eccentric shaft (21) are assembled in the ear holes at both ends of the upper bearing housing (14) and the lower bearing housing (15) through copper sleeves (25).

4. The linkage mechanism for a disc scissor box according to claim 1, characterized in that: The bottom surfaces of the lower bearing seat (15) are positioned and connected to the base frame of the disc scissor box via keys, and the upper bearing seat (14) is floatingly connected to the base frame of the disc scissor box.

5. The linkage mechanism for a disc scissor box according to claim 1, characterized in that: The upper right eccentric shaft (17) is rotatably connected to the right side of the upper bearing seat (14). Copper sleeves (25) are provided between the two sides of the middle part of the upper right eccentric shaft (17) and the upper bearing seat (14). One end of the two swing arms (19) is connected to the two ends of the upper right eccentric shaft (17) with bolts respectively. The other end of the two swing arms (19) is connected to the two ends of the lower right eccentric shaft (18) with bolts respectively. The angle between the swing arms (19) and the horizontal direction is 45°. The eccentricity L2 between the center of the middle part of the upper right eccentric shaft (17) and the center of the journals on both sides is 3mm. The journals on both sides of the upper right eccentric shaft (17) are assembled into the ear holes at both ends of the upper bearing seat (14) through copper sleeves (25).

6. The linkage mechanism for a disc scissor box according to claim 1, characterized in that: The lower right eccentric shaft (18) is rotatably connected to the right side of the lower bearing seat (15). Copper sleeves (25) are provided between the middle two sides of the lower right eccentric shaft (18), the two side journals and the lower bearing seat (15). The right dial (20) is keyed to the front end of the lower right eccentric shaft (18). The eccentricity L3 between the middle axis of the lower right eccentric shaft (18) and the axis of the two side journals is 4mm. The two side journals of the lower right eccentric shaft (18) are assembled in the ear holes at both ends of the lower bearing seat (15) through the copper sleeves (25). The transmission end of the lower right eccentric shaft (18) is equipped with a side clearance adjustment servo motor (23) for adjusting the side clearance of the upper and lower blades (8). The side clearance adjustment servo motor (23) is equipped with an encoder. The lower right eccentric shaft (18) is keyed to the output end of the side clearance adjustment servo motor (23).

7. The linkage mechanism for a disc scissor box according to claim 1, characterized in that: There are two hinge bolts (16). One end of the front and rear hinge bolts (16) is connected to the upper bearing seat (14) by threads and locked with stacked spring washers and double nuts. The ball head end of the front and rear hinge bolts (16) is connected to the lower bearing seat (15) by pins (26). The upper bearing seat (14) can rotate around the pin (26) at the ball head end of the hinge bolt (16).

8. The linkage mechanism for a disc scissor box according to claim 1, characterized in that: The pointer 1 (27) of the left dial (22) on the left eccentric shaft (21) is fixedly connected to the lower bearing seat (15) through the pointer seat 1 (28).

9. A linkage mechanism for a disc scissor box according to claim 1, characterized in that: The pointer 29 of the right dial (20) on the lower right eccentric shaft (18) is fixedly connected to the lower bearing seat (15) through the pointer seat 2 (30).

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