Double-shaft shredding machine for crushing and demagnetizing waste battery positive plates

Abstract

The invention relates to the technical field of waste battery crushing, in particular to a double-shaft shredding machine for crushing and demagnetizing a waste battery positive plate. Two knife rollers which are horizontally meshed in a staggered mode, lifting mechanisms distributed on the two sides of the two knife rollers, a screening mechanism distributed below the position between the two knife rollers, an inclined sliding plate arranged under the screening mechanism and a magnetic rod magnetically separated at the bottom end of the inclined sliding plate are arranged in the machine box, and the two lifting mechanisms in the machine box are symmetrically distributed. After a battery pole piece material is crushed by the knife roll, generated crushed materials fall onto the screening mechanism, the cover plate continuously vibrates and separates the crushed materials in a vibrating mode, small-particle crushed materials meeting the specification can penetrate through the cover plate to be subjected to subsequent magnetic separation, and large-particle crushed materials can slide to the bottom end of the stepped conveying belt, are conveyed to the position above the knife roll by the stepped conveying belt and are subjected to crushing treatment again. In addition, the surface of the cover plate is periodically cleaned through a brush roller, and the screening problem caused by the fact that crushed materials block the cover plate is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of old battery crushing, in particular to a double-shaft shredder for crushing and demagnetizing positive electrode sheets of waste batteries. Background Art

[0002] The main purpose of crushing and demagnetizing the positive electrode sheets of waste batteries is to achieve the separation and recovery of positive electrode materials. Through crushing and demagnetization treatment, the useful materials in the positive electrode sheets can be separated to facilitate subsequent recycling. The crushing process uses a double-axis shredder to crush the battery pole sheets. The fragments produced after crushing pass through the area where the magnet is located. The fragments that can be magnetically attracted and the fragments that cannot be magnetically attracted will fall in two paths under the action of the magnetic suction force, thereby achieving the purpose of magnetic separation of the fragments. The size and weight of the pole sheet fragments in the magnetic separation process will also affect the separation result. Only the fragment particles that meet the magnetic separation specifications can fall along the specified path under the action of the magnetic suction force. Based on the purpose of fine magnetic separation of the pole sheet fragments, the present invention provides a double-axis shredder for crushing and demagnetizing the positive electrode sheets of waste batteries. Summary of the invention

[0003] The object of the present invention is to provide a double-shaft shredder for crushing and demagnetizing positive electrode sheets of waste batteries to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-shaft shredder for crushing and demagnetizing positive electrode sheets of waste batteries, comprising a chassis, a feed hopper is arranged at the upper end of the chassis, two horizontally staggered meshing knife rollers, a lifting mechanism distributed on both sides of the two knife rollers, a screening mechanism distributed below the two knife rollers, an inclined slide plate arranged just below the screening mechanism, and a magnetic rod for magnetic separation at the bottom end of the inclined slide plate, two lifting mechanisms in the chassis are symmetrically distributed, and the lifting mechanism includes an inclined step conveyor belt, two ends of the inner part of the step conveyor belt, and a plurality of lifting mechanisms arranged on the upper end of the chassis. The supporting conveyor belt shaft, the wall panels distributed between the knife rollers and the step conveyor belt, and the V-shaped bottom plate at the bottom of the wall panel, one end of the V-shaped bottom plate collects the materials sliding down from the screening mechanism by extending to the position below the edge of the screening mechanism, and the materials are lifted and transported by the step conveyor belt after passing through the channel reserved between the V-shaped bottom plate and the wall panel, one end of the conveyor belt shaft extends to the outside of the chassis, the wall panel makes sliding contact with the step conveyor belt to raise the materials transported on the step conveyor belt, and the top of the wall panel is provided with a transverse inclined plate to guide the materials to slide to the upper position between the two knife rollers.

[0005] The screening mechanism includes a cover plate, and a power device, a bevel rack, a brush roller and a vibration control shaft distributed below the cover plate. Power devices are arranged at both ends of the cover plate. Vibration control shafts are vertically transmitted at both ends of the power device. The vibration control shaft establishes transmission between the two power devices. Two parallel brush rollers are connected between the two power devices. The brush rollers clean the cover plate by moving along the lower surface of the cover plate. The moving brush rollers are rotated by fixing the bevel racks at the edge of the end of the cover plate.

[0006] The cover plate includes a V-shaped cover plate and vertical plates fixed at both ends of the V-shaped cover plate, and the V-shaped cover plate is provided with a plurality of evenly distributed through holes, one end of the V-shaped bottom plate extends to a position below the side edge of the cover plate, the brush roller includes a roller shaft and elastic hard bristles fixed on the roller shaft, and the roller shaft is connected to the helical rack through a fixed gear, the vibration control shaft includes a horizontal shaft and a vortex plate fixed on the horizontal shaft, and the vortex plate causes the cover plate to rise and fall and vibrate through contact rotation.

[0007] The power device includes a transverse worm gear that establishes transmission between two vibration control shafts, a long cylinder gear that transmits transmission on one side of the transverse worm gear, and a limiting cross frame fixed on the inner wall of the chassis. The cover plate vertical plate slides through a square hole opened at the end of the limiting cross frame by fixing an L-shaped short column. The limiting cross frame supports the vibration control shaft and the transverse worm gear. One end of the long cylinder gear is movably sleeved in a through hole opened on the limiting cross frame through a fixed shaft body. The end of the brush roller is meshed and connected with the annular bevel gear fixed on the vibration control shaft through a fixed bevel gear. The long cylinder gear is meshed and connected with the helical teeth on the transverse worm gear.

[0008] The power device also includes a V-shaped top frame fixed on the cover plate, three rollers supported on the V-shaped top frame, a triangular closed-loop belt supported by two rollers, an intermittent brake component that establishes transmission between the triangular closed-loop belt and the long-barrel gear, and a T-seat fixed on the triangular closed-loop belt, and the end of the brush roller is movably sleeved in a through hole opened on the T-seat.

[0009] The intermittent brake comprises an integrated plate frame with one end fixed on the V-shaped top frame, a balance wheel group, a spring group and a vertical worm supported on the integrated plate frame, and a disc gear connected to the balance wheel group, the spring group is connected between the balance wheel group and the vertical worm, one end of the vertical worm is connected to the fixed gear and the long cylinder gear through meshing transmission, the other end of the vertical worm is movably sleeved in a through hole opened on the integrated plate frame, and the triangular closed-loop belt is connected to the disc gear through a row of tooth grooves.

[0010] The balance wheel assembly includes a wheel plate, a bullet-blocking plate elastically positioned on one side of the wheel plate, a pendulum column hinged to the wheel plate at one end, a transverse drive column hinged to the other end of the pendulum column, and a pressure shaft for transmission on one side of the transverse drive column. The pressure shaft is movably sleeved in a through hole opened on the integrated plate frame, one end of the pressure shaft is fixed to the middle part of the disc gear, and the other end of the pressure shaft is connected to a row of teeth meshing and transmission arranged on the fixed gear and the transverse drive column, and the transverse drive column slides through the inner hole of the square cylinder arranged on the integrated plate frame.

[0011] The wheel plate comprises a disc body and a protrusion fixed on the edge of the disc body; one end of the bullet-blocking sheet is fixed on the integrated plate frame, and the other end intercepts the wheel plate protrusion.

[0012] The mainspring assembly includes a central control shaft vertically fixed in the middle of the wheel plate body, a mainspring with an external fixed sleeve of the central control shaft, and an outer gear ring of the external fixed sleeve of the mainspring, and the outer gear ring is meshingly connected with the vertical worm.

[0013] The mainspring assembly also includes a secondary support plate, which is fixed on the bottom surface of one end of the outer gear ring. The central control shaft is movably sleeved in a circular hole opened in the middle of the secondary support plate, and the central control shaft is also movably sleeved in the inner hole of the ring tube fixed on the integrated plate frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. After the battery pole piece material is crushed by the knife roller, the generated fragments fall onto the screening mechanism, and the cover plate continues to vibrate to screen the fragments. Small particle fragments that meet the specifications will pass through the cover plate for subsequent magnetic separation, while large particle fragments will slide to the bottom of the step conveyor belt and be transported to the top of the knife roller by the step conveyor belt for re-crushing. In addition, the present invention uses a brush roller to periodically clean the surface of the cover plate to avoid screening problems caused by fragments blocking the cover plate.

[0016] 2. The present invention realizes automatic adjustment and control of the internal devices of the screening mechanism by driving the vibration control shaft through a motor. The continuous rotation of the vibration control shaft causes continuous lifting and vibration of the cover plate. The long cylinder gear is rotated by the horizontal worm, and the power is converted through the intermittent brake part to make the triangular closed-loop belt reciprocating. Then the brush roller is driven by the T-seat, and the brush roller moves along the lower surface of the cover plate to clean the through holes on the cover plate blocked by debris. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention.

[0018] Figure 2 Schematic diagram of the knife roller position.

[0019] Figure 3 Schematic diagram of the lifting mechanism position.

[0020] Figure 4 It is a schematic diagram of the lifting mechanism structure.

[0021] Figure 5 It is a schematic diagram of the screening mechanism structure.

[0022] Figure 6 This is a schematic diagram of the position of the step conveyor belt.

[0023] Figure 7 Schematic diagram of the cover position.

[0024] Figure 8 Schematic diagram of the cover structure.

[0025] Fig. 9 This is a schematic diagram of the power unit structure.

[0026] Fig.10 This is a schematic diagram of the vibration-controlled axis structure.

[0027] Fig.11 It is a schematic diagram of the intermittent brake structure.

[0028] Fig.12 This is a schematic diagram of the balance wheel structure.

[0029] Fig.13 This is a schematic diagram of the V-shaped top frame structure.

[0030] Fig.14 This is a schematic diagram of the structure of the clockwork group.

[0031] In the figure: chassis 1, feed hopper 2, knife roller 3, lifting mechanism 4, screening mechanism 5, inclined slide plate 6, magnetic rod 7, linkage shaft 8, frame 9, stepped conveyor belt 10, wall panel 11, conveyor belt shaft 12, V-shaped bottom plate 13, power unit 14, oblique rack 15, brush roller 16, cover plate 17, vibration control shaft 18, V-shaped top frame 19, roller 20, triangular closed-loop belt 21, intermittent brake 22, long cylinder gear 23, T seat 24, horizontal worm 25, limit horizontal frame 26, disc gear 27, balance wheel group 28, spring group 29, integrated plate frame 30, vertical worm 31, bullet-blocking plate 32, wheel plate 33, pendulum column 34, horizontal drive column 35, pressure shaft 36, outer gear ring 37, central control shaft 38, spring 39, auxiliary support plate 40. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in 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 technical solutions in 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.

[0033] See also Figures 1 to 14The present invention provides a technical solution: a double-shaft shredder for crushing and demagnetizing positive electrode sheets of waste batteries, comprising a chassis 1, a feeding hopper 2 is arranged at the upper end of the chassis 1, two horizontally staggered meshing knife rollers 3, a lifting mechanism 4 distributed on both sides of the two knife rollers 3, a screening mechanism 5 distributed below the two knife rollers 3, an inclined slide 6 arranged just below the screening mechanism 5, and a magnetic rod 7 for magnetic separation at the bottom end of the inclined slide 6, the two lifting mechanisms 4 in the chassis 1 are symmetrically distributed, the lifting mechanism 4 includes an inclined step conveyor belt 10, a conveyor belt shaft 12 supported at both ends of the step conveyor belt 10, and a distribution The wall panel 11 between the knife roller 3 and the step conveyor belt 10, and the V-shaped bottom plate 13 at the bottom end of the wall panel 11, one end of the V-shaped bottom plate 13 extends to the position below the edge of the screening mechanism 5 to collect the material sliding down from the screening mechanism 5, and the material is lifted and transported by the step conveyor belt 10 after passing through the channel reserved between the V-shaped bottom plate 13 and the wall panel 11, one end of the conveyor belt shaft 12 extends to the outside of the chassis 1, the wall panel 11 makes sliding contact with the step conveyor belt 10 to make the material transported on the step conveyor belt 10 rise, and the top of the wall panel 11 is provided with a transverse inclined plate to guide the material to slide to the upper position between the two knife rollers 3.

[0034] When crushing the battery pole piece, the pole piece material is poured into the feed hopper 2, and the material falls between the two knife rollers 3. The knife roller 3 includes a knife shaft and a row of blades on the knife shaft. The two knife rollers 3 rotate relative to each other to crush the pole piece, and the resulting crushed material falls onto the screening mechanism 5 for screening materials. The small particle crushed material that meets the requirements continues to fall after passing through the screening mechanism 5, and slides on the inclined slide 6 to the position of the magnetic rod 7. A driving shaft is connected to one end of the magnetic rod 7. The crushed material is screened during the rotation of the magnetic rod 7. Specifically, the crushed material that is not magnetically attracted will fall directly after being supported by the magnetic rod 7, and the magnetic crushed material is adsorbed on the surface of the magnetic rod 7, and moves around with the rotation of the magnetic rod 7. Through the existing According to the technical interception method, a baffle is set on one side of the magnetic rod 7 to block the magnetically attracted fragments that surround the magnetic rod 7 for most of the circle. In this way, the magnetically attracted fragments accumulate and fall down. The falling points of the fragments that are not attracted by the magnet are different from those of the magnetically attracted fragments, so the magnetic separation of the fragments is realized. There is still a part of large-particle fragments above the screening mechanism 5 that cannot pass through the screening mechanism 5, but slide to the positions on both sides of the screening mechanism 5, and finally accumulate above the V-shaped bottom plate 13, and are transported away by the working step conveyor belt 10. The large-particle fragments rise under the transportation of the step conveyor belt 10, and then slide back to the upper position between the two knife rollers 3 through the inclined plate at the top of the wall panel 11, and are crushed again by the two rotating knife rollers 3.

[0035] refer to Figure 5It is understood that the screening mechanism 5 includes a cover plate 17, and a power device 14, a bevel rack 15, a brush roller 16 and a vibration control shaft 18 distributed below the cover plate 17. The power devices 14 are arranged at both ends of the cover plate 17. The vibration control shafts 18 are vertically transmitted at both ends of the power device 14. The vibration control shafts 18 establish transmission between the two power devices 14. Two parallel brush rollers 16 are connected between the two power devices 14. The brush rollers 16 clean the cover plate 17 by moving along the lower surface of the cover plate 17. The edge position of the end of the cover plate 17 is fixed by the bevel rack 15 to rotate the moving brush roller 16.

[0036] The cover plate 17 includes a V-shaped cover plate and vertical plates fixed at both ends of the V-shaped cover plate, and the V-shaped cover plate is provided with a plurality of evenly distributed through holes, one end of the V-shaped bottom plate 13 extends to a position below the side edge of the cover plate 17, the brush roller 16 includes a roller shaft and elastic hard bristles fixed on the roller shaft, and the roller shaft is meshed and connected with the bevel rack 15 through a fixed gear, the vibration control shaft 18 includes a horizontal shaft and a spiral plate fixed on the horizontal shaft, and the spiral plate causes the cover plate 17 to rise and fall and vibrate by contact rotation.

[0037] refer to Fig. 9 It is understood that the power device 14 includes a horizontal worm 25 for establishing transmission between the two vibration control shafts 18, a long cylinder gear 23 for transmission on one side of the horizontal worm 25, and a limit horizontal frame 26 fixed on the inner wall of the chassis 1. The cover plate 17 vertical plate slides through the square hole opened at the end of the limit horizontal frame 26 by fixing the L-shaped short column. The limit horizontal frame 26 supports the vibration control shaft 18 and the horizontal worm 25. One end of the long cylinder gear 23 is movably sleeved in the through hole opened on the limit horizontal frame 26 through a fixed shaft body. The end of the brush roller 16 is connected to the vibration by a fixed bevel gear. The annular bevel gear fixed on the control shaft 18 is meshed and connected for transmission, the long cylinder gear 23 and the helical teeth on the horizontal worm 25 are meshed and connected for transmission, the rod body of the horizontal worm 25 and the horizontal axis of the vibration control shaft 18 are respectively movably sleeved in different column holes opened on the limiting horizontal frame 26, and one end of the horizontal axis of a vibration control shaft 18 is selected to extend to the outside of the chassis 1 and is externally connected to a small motor drive mechanism in the prior art. In this way, one vibration control shaft 18 is controlled to rotate, and the two vibration control shafts 18 and the two horizontal worms 25 are linked to form a square frame, and the vibration control shaft 18 and the horizontal worm 25 rotate synchronously.

[0038] refer to Fig. 9It is understood that the power device 14 also includes a V-shaped top frame 19 fixed on the cover plate 17, three rollers 20 supported on the V-shaped top frame 19, a triangular closed-loop belt 21 supported by the two rollers 20, an intermittent brake 22 for establishing transmission between the triangular closed-loop belt 21 and the long cylinder gear 23, and a T-seat 24 fixed on the triangular closed-loop belt 21. The end of the brush roller 16 is movably sleeved in a through hole opened on the T-seat 24. The structural device in the screening mechanism 5 can also be seen as two parts, one part does not vibrate, and the other part vibrates with the lifting and lowering of the cover plate 17. The non-vibrating part includes the long cylinder gear 23, the horizontal worm 25, the vibration control shaft 18 and the limiting horizontal frame 26, and the remaining parts and devices undergo lifting and vibrating.

[0039] refer to Fig.11 It is understood that the intermittent brake 22 includes an integrated plate frame 30 with one end fixed on the V-shaped top frame 19, a balance wheel group 28, a spring group 29 and a vertical worm gear 31 supported on the integrated plate frame 30, and a disc gear 27 transmission-connected to the balance wheel group 28, the spring group 29 transmission-connected between the balance wheel group 28 and the vertical worm gear 31, one end of the vertical worm gear 31 is meshingly connected to the long cylinder gear 23 through a fixed gear, the other end of the vertical worm gear 31 is movably sleeved in a through hole opened on the integrated plate frame 30, and the triangular closed-loop belt 21 is meshingly connected to the disc gear 27 through a row of tooth grooves.

[0040] The balance wheel assembly 28 includes a wheel plate 33, a bullet-blocking plate 32 elastically positioned on one side of the wheel plate 33, a pendulum column 34 hinged to the wheel plate 33 at one end, a transverse drive column 35 hinged to the other end of the pendulum column 34, and a pressure shaft 36 for transmission on one side of the transverse drive column 35. The pressure shaft 36 is movably sleeved in a through hole opened on the integrated plate frame 30, one end of the pressure shaft 36 is fixed to the middle of the disc gear 27, and the other end of the pressure shaft 36 is meshed and driven by a row of teeth arranged on the fixed gear and the transverse drive column 35, and the transverse drive column 35 slides through the inner hole of the square cylinder arranged on the integrated plate frame 30.

[0041] The wheel plate 33 includes a disk body and a protrusion fixed to the edge of the disk body. One end of the bullet-blocking sheet 32 ​​is fixed to the integrated plate frame 30 , and the other end intercepts the protrusion of the wheel plate 33 .

[0042] The mainspring assembly 29 includes a central control shaft 38 vertically fixed in the middle of the wheel plate 33, a mainspring 39 with an outer fixed sleeve on the central control shaft 38, and an outer gear ring 37 on the outer fixed sleeve of the mainspring 39. The outer gear ring 37 is meshed and transmission-connected with the vertical worm 31.

[0043] The mainspring assembly 29 also includes a secondary support plate 40, which is fixed on the bottom surface of one end of the outer gear ring 37. The central control shaft 38 is movably sleeved in a circular hole opened in the middle of the secondary support plate 40, and the central control shaft 38 is also movably sleeved in the inner hole of the ring tube fixed on the integrated plate frame 30.

[0044] The pole piece fragments fall onto the cover plate 17, and the cover plate 17 continues to rise and fall and vibrate. Small particles of fragments pass through the through holes on the cover plate 17 and then fall down, while large particles of fragments cannot pass through and slide down on the vibrating cover plate 17. Some fragments of fragments will block the through holes of the cover plate 17. The present invention cleans the blocked through holes by periodically moving the brush roller 16. Specifically, the vibration control shaft 18 and the horizontal worm 25 rotate synchronously, and the horizontal worm 25 drives the long cylinder gear 23, and then drives the outer ring gear 37 to rotate through the vertical worm 31. The rotation of the outer ring gear 37 causes the spring 39 to contract and store force, and the spring 39 provides rotation pressure for the central control shaft 38. The central control shaft 38 and the wheel plate 33 are stationary because the bullet-blocking piece 32 jams the wheel plate 33. After the spring 39 stores enough force, the wheel plate 33 will break through. The spring 39 releases power to make the central control shaft 38 rotate one circle, and the wheel plate 33 drives the pendulum column 34 to swing during one circle, causing the horizontal drive column 35 to complete a reciprocating translation, thereby driving the pressure shaft 36 to reciprocate for a while, and then the disc gear 27 reciprocates to drive the triangular closed-loop belt 21 to convey, so that the T seat 24 is accompanied by a reciprocating movement, and the T seat 24 drives the brush roller 16, and the brush roller 16 moves obliquely back and forth along the lower surface of the cover plate 17. Since the gear at the end of the brush roller 16 is meshed with the helical rack 15, the brush roller 16 continues to rotate during the movement, so that the elastic hard bristles on the brush roller 16 impact the through hole of the cover plate 17, thereby clearing the through hole blocked by debris.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of used batteries, comprising a chassis (1), characterized in that: A feed hopper (2) is provided at the upper end of the chassis (1), and the chassis (1) is provided with two horizontally staggered meshing knife rollers (3), a lifting mechanism (4) distributed on both sides of the two knife rollers (3), a screening mechanism (5) distributed below the two knife rollers (3), an inclined slide plate (6) provided directly below the screening mechanism (5), and a magnetic rod (7) for magnetic separation at the bottom end of the inclined slide plate (6). The two lifting mechanisms (4) in the chassis (1) are symmetrically distributed, and the lifting mechanism (4) includes an inclined step conveyor belt (10), a conveyor belt shaft (12) supported at both ends of the step conveyor belt (10), and a conveyor belt shaft (12) distributed between the knife rollers (3) and the step conveyor belt (10). The machine body comprises a wall panel (11) and a V-shaped bottom panel (13) at the bottom end of the wall panel (11), one end of the V-shaped bottom panel (13) extends to a position below the edge of the screening mechanism (5) to collect materials sliding down from the screening mechanism (5), and the materials are lifted and transported by the step conveyor belt (10) after passing through a channel reserved between the V-shaped bottom panel (13) and the wall panel (11), one end of the conveyor belt shaft (12) extends to the outside of the chassis (1), the wall panel (11) makes sliding contact with the step conveyor belt (10) to lift the materials transported on the step conveyor belt (10), and a transverse inclined plate is arranged at the top end of the wall panel (11) to guide the materials to slide down to the upper position between the two knife rollers (3).

2. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of waste batteries according to claim 1, characterized in that: The screening mechanism (5) comprises a cover plate (17), and a power device (14), an oblique rack (15), a brush roller (16) and a vibration control shaft (18) distributed below the cover plate (17). The power devices (14) are arranged at both ends of the cover plate (17). The vibration control shaft (18) is vertically transmitted at both ends of the power device (14). The vibration control shaft (18) establishes transmission between the two power devices (14). Two parallel brush rollers (16) are connected between the two power devices (14). The brush roller (16) cleans the cover plate (17) by moving along the lower surface of the cover plate (17). The edge of the end of the cover plate (17) is fixed by the oblique rack (15) to rotate the moving brush roller (16).

3. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of waste batteries according to claim 2, characterized in that: The cover plate (17) comprises a V-shaped cover plate and vertical plates fixed at both ends of the V-shaped cover plate, and the V-shaped cover plate is provided with a plurality of evenly distributed through holes, one end of the V-shaped bottom plate (13) extends to a position below the side edge of the cover plate (17), the brush roller (16) comprises a roller shaft and elastic hard bristles fixed around the roller shaft, and the roller shaft is meshed and connected to the bevel rack (15) through a fixed gear, and the vibration control shaft (18) comprises a horizontal shaft and a spiral plate fixed on the horizontal shaft, and the spiral plate causes the cover plate (17) to rise and fall and vibrate by contact rotation.

4. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of used batteries according to claim 3, characterized in that: The power device (14) comprises a transverse worm (25) for establishing transmission between two vibration control shafts (18), a long cylindrical gear (23) for transmission on one side of the transverse worm (25), and a limit horizontal frame (26) fixed on the inner wall of the chassis (1); a square hole opened at the end of the limit horizontal frame (26) is slidably passed through the L-shaped short column on the vertical plate of the cover plate (17); the limit horizontal frame (26) supports the vibration control shaft (18) and the transverse worm (25); one end of the long cylindrical gear (23) is movably sleeved in the through hole opened on the limit horizontal frame (26) through a fixed shaft body; the end of the brush roller (16) is meshed and transmission-connected with the annular bevel gear fixed on the vibration control shaft (18) through a fixed bevel gear; and the long cylindrical gear (23) is meshed and transmission-connected with the helical teeth on the transverse worm (25).

5. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of waste batteries according to claim 4, characterized in that: The power device (14) further comprises a V-shaped top frame (19) fixed on the cover plate (17), three rollers (20) supported on the V-shaped top frame (19), a triangular closed-loop belt (21) supported by the two rollers (20), an intermittent brake member (22) for establishing transmission between the triangular closed-loop belt (21) and the long-cylinder gear (23), and a T-seat (24) fixed on the triangular closed-loop belt (21), wherein the end of the brush roller (16) is movably sleeved in a through hole provided on the T-seat (24).

6. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of used batteries according to claim 5, characterized in that: The intermittent brake member (22) comprises an integrated plate frame (30) having one end fixed on a V-shaped top frame (19), a balance wheel group (28), a spring group (29) and a vertical worm gear (31) supported on the integrated plate frame (30), and a disc gear (27) drivingly connected to the balance wheel group (28); the spring group (29) drivingly connected between the balance wheel group (28) and the vertical worm gear (31); one end of the vertical worm gear (31) is meshingly connected to the long cylinder gear (23) through a fixed gear; the other end of the vertical worm gear (31) is movably sleeved in a through hole provided on the integrated plate frame (30); and a row of tooth grooves is provided on the triangular closed-loop belt (21) to mesh with the disc gear (27) for transmission connection.

7. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of used batteries according to claim 6, characterized in that: The balance wheel assembly (28) comprises a wheel plate (33), a spring-blocking plate (32) elastically positioned on one side of the wheel plate (33), a swing column (34) hinged at one end to the wheel plate (33), a transverse drive column (35) hinged at the other end of the swing column (34), and a pressure shaft (36) for transmission on one side of the transverse drive column (35), the pressure shaft (36) being movably sleeved in a through hole provided on the integrated plate frame (30), one end of the pressure shaft (36) being fixed to the middle of the disc gear (27), the other end of the pressure shaft (36) being meshed and transmission-connected with a row of teeth provided on the transverse drive column (35) via a fixed gear, and the transverse drive column (35) slidingly passes through an inner hole of a square cylinder provided on the integrated plate frame (30).

8. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of used batteries according to claim 7, characterized in that: The wheel plate (33) comprises a disc body and a protrusion fixed to the edge of the disc body; one end of the bullet-blocking sheet (32) is fixed to the integrated plate frame (30), and the other end intercepts the protrusion of the wheel plate (33).

9. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of used batteries according to claim 8, characterized in that: The mainspring assembly (29) comprises a central control shaft (38) vertically fixed to the middle of the wheel plate (33) disk, a mainspring (39) with an external fixing sleeve of the central control shaft (38), and an external gear ring (37) of the external fixing sleeve of the mainspring (39), wherein the external gear ring (37) is meshingly connected to the vertical worm (31).

10. A double-shaft shredder for crushing and demagnetizing positive electrode sheets of used batteries according to claim 9, characterized in that: The mainspring assembly (29) further comprises a secondary support plate (40), the secondary support plate (40) being fixed to the bottom surface of one end of the outer gear ring (37), the central control shaft (38) being movably sleeved in a circular hole opened in the middle of the secondary support plate (40), and the central control shaft (38) being movably sleeved in an inner hole of a ring tube fixed on the integrated plate frame (30).

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