Automatic paper shredder

Abstract

The invention discloses an automatic paper shredder, and belongs to the technical field of paper shredders, the automatic paper shredder comprises a paper shredding box body, the top of the paper shredding box body is provided with a feeding port, the top in the paper shredding box body is provided with a cutting unit used for conveying and shredding waste paper, and the front side of the paper shredding box body is connected with a collection drawer in an inserted manner; a spraying device used for softening paper scraps in the collecting drawer and a compression unit used for extruding wet paper scraps are arranged in the paper shredding box body, the functions of waste paper shredding, paper scrap softening, extruding and the like are integrated, and compared with a traditional paper shredder, the practicability of the equipment is greatly improved; and the subsequent secondary treatment process and cost of the paper scraps are reduced.

Description

Technical Field

[0001] The invention relates to an automatic paper shredder, and belongs to the technical field of paper shredders. Background Art

[0002] In daily office and life scenarios, paper is widely used, which generates a large amount of waste paper that needs to be processed. Therefore, paper shredders have become an essential office supply. Paper shredders are machines used to shred and destroy paper. In order to keep discarded documents confidential, paper must be divided into many small pieces of paper. In addition to processing paper, today's paper shredders can also cut credit cards, CDs, etc.

[0003] For example, a Chinese invention patent with the announcement number CN118416997A discloses a paper shredder for preventing paper jams, including a paper scrap box, a shell cover is provided on the paper scrap box, a slot is provided at the center of the top of the shell cover, bases are symmetrically provided on the left and right sides of the paper scrap box, two horizontally placed rollers are provided between the two bases, and blades are provided at equal distances on the shaft of the rollers. The paper shredder for preventing paper jams is composed of a paper shredding mechanism through the cooperation of rollers, blades, and motors.

[0004] The above solution has the following shortcomings in actual use: This solution uses a micro electric push rod, a base plate, a top block and a spring to achieve the two rollers moving closer or farther away. By controlling the rollers to move away from each other, it is convenient to pull out the jammed paper. However, in actual use, the above structure will still cause paper jams when shredding thicker paper, and the above structure has a relatively single function and can only achieve basic paper shredding functions. There is a lack of effective means for the subsequent treatment of the shredded paper scraps, which is inconvenient for subsequent recycling. Summary of the invention

[0005] The object of the present invention is to provide an automatic paper shredder to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: Compared with the prior art, the present invention provides an automatic paper shredder, comprising a paper shredding box, a feeding port is provided at the top of the paper shredding box, a cutting unit for conveying and crushing waste paper is arranged at the top of the paper shredding box, a collecting drawer is plugged into the front side of the paper shredding box, a spray device for softening paper scraps in the collecting drawer and a compression unit for squeezing wet paper scraps are arranged in the paper shredding box; the cutting unit comprises two cutting shafts, each of which is sleeved with a mounting sleeve, a plurality of cutting mounting rings are sleeved on the outer circumferential surface of the mounting sleeve, a plurality of crushing knives are arranged on the cutting mounting ring, the cutting mounting rings on the two cutting shafts are arranged in a staggered manner, a driving member is arranged below the two cutting shafts, and the two cutting shafts are driven to move by the driving member, so that the distance between the crushing knives on the two cutting shafts is adjusted to meet the cutting requirements of multiple types of waste paper.

[0007] Preferably, the cutting unit further comprises two mounting plates, each of which is provided with two mounting blocks, the four mounting blocks are connected to two conveying rollers via a main shaft, and the two conveying rollers are located directly above the two cutting shafts.

[0008] Preferably, two sets of driving units are provided on one side of the shredding box, and the driving unit includes a motor, the output shaft of the motor extends into the shredding box and is provided with a second synchronous wheel, one end of the main shaft and the cutting shaft is provided with a first synchronous wheel, a synchronous belt is sleeved on the second synchronous wheel and the two first synchronous wheels, and a tensioning wheel for tensioning the synchronous belt is provided on one side of the inner wall of the shredding box.

[0009] Preferably, the driving member includes a fixed shaft, which is fixedly connected to the inner wall of the shredding box, and a plurality of connecting plates are sleeved on the fixed shaft, one side of the connecting plate is sleeved with the cutting shaft, and the connecting plates are rotatably connected to the cutting mounting rings respectively, and a driving plate is provided at the end of the cutting shaft, and the ends of the two driving plates are rotated through the shaft body, and a cylinder for driving the shaft body to move up and down is provided in the shredding box, and the cylinder is rotatably connected to the inner wall of the shredding box through a fixed block.

[0010] Preferably, a plurality of adjustment plates are sleeved on the fixed shaft, and the plurality of adjustment plates are respectively connected to the connecting plates, a limiting seat is arranged on one side of the adjustment plate, a through slide groove corresponding to the limiting seat is provided on the shredding box body, two limiting columns are sleeved on the limiting seat, a limiting plate is arranged at one end of the two limiting columns, and a plurality of limiting holes corresponding to the limiting columns are provided on the shredding box body.

[0011] Preferably, the spray device includes a pump body and a water collecting tank arranged at the bottom of the shredding box body, the water inlet of the pump body is connected to the water collecting tank in the shredding box body through a liquid inlet pipe, the water outlet of the pump body is provided with a liquid outlet pipe, the end of the liquid outlet pipe extends to the interior of the shredding box body and is provided with a diverter, and the diverter is provided with multiple atomizing nozzles.

[0012] Preferably, the compression unit comprises two hydraulic cylinders, the output ends of the hydraulic cylinders extend to the interior of the shredding box and are provided with a plate body, the collecting drawer is provided with two through grooves corresponding to the plate body, an extrusion plate is slidably connected inside the collecting drawer, and a plurality of seepage holes are provided at the bottom of the collecting drawer.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention integrates the functions of waste paper crushing, paper scrap softening, and squeezing. Compared with the traditional paper shredder, it greatly expands the practicality of the equipment and reduces the subsequent process and cost of secondary processing of paper scraps. The two cutting shafts are driven to move by the driving member, so that the distance between the shredding knives on the two cutting shafts can be adjusted to meet the cutting requirements of different types of waste paper. Whether it is thick paper or thin paper, it can achieve an ideal shredding effect, effectively avoid paper jams, and improve the versatility of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a cross-sectional view of the overall structure of the present invention; Figure 3 It is a schematic structural diagram of a cutting unit of the present invention; Figure 4 It is a structural schematic diagram of the driving member of the present invention; Figure 5 It is a structural schematic diagram of the fixed shaft of the present invention; Figure 6 is a schematic structural diagram of a driving unit of the present invention; Figure 7 It is a structural disassembly diagram of the spray device and the compression unit of the present invention.

[0016] In the figure: 1. shredder box; 2. feeding port; 3. mounting plate; 4. mounting block; 5. main shaft; 6. conveying roller; 7. cutting shaft; 8. mounting sleeve; 9. cutting mounting ring; 10. groove; 11. crushing knife; 12. connecting plate; 13. fixed shaft; 14. adjusting plate; 15. limit seat; 16. through slide; 17. limit plate; 18. limit column; 19. limit hole; 20. driving plate; 21. cylinder; 22. fixing block; 23. synchronous wheel 1; 24. motor; 25. synchronous wheel 2; 26. synchronous belt; 27. tension wheel; 28. collecting drawer; 29. ​​seepage hole; 30. water collecting tank; 31. extrusion plate; 32. pump body; 33. liquid inlet pipe; 34. liquid outlet pipe; 35. diverter; 36. atomizing nozzle; 37. hydraulic cylinder; 38. plate body. DETAILED DESCRIPTION

[0017] 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 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.

[0018] See also Figure 1-Figure 7 , the present invention provides a technical solution: like Figure 1 and Figure 2 As shown, an automatic paper shredder comprises a paper shredding box 1, a feeding port 2 is provided on the top of the paper shredding box 1 to facilitate the input of waste paper, a cutting unit is provided on the top of the paper shredding box 1 to transport and crush the waste paper, a collecting drawer 28 is plugged into the front side of the paper shredding box 1, a spray device for softening the paper scraps in the collecting drawer 28 and a compression unit for squeezing the wet paper scraps are provided in the paper shredding box 1, the present invention integrates the functions of waste paper crushing, paper scrap softening and squeezing, and compared with the traditional paper shredder, the practicability of the equipment is greatly expanded, and the process and cost of subsequent secondary processing of the paper scraps are reduced.

[0019] like Figure 3 and Figure 5As shown, the cutting unit includes two cutting shafts 7, each of which is sleeved with a mounting sleeve 8, and a plurality of cutting mounting rings 9 are sleeved on the outer circumference of the mounting sleeve 8. A groove 10 is provided on the outer circumference of the mounting sleeve 8, and a protrusion corresponding to the groove 10 is provided on the inner circumference of the cutting mounting ring 9. A plurality of crushing knives 11 are provided on the cutting mounting ring 9. The cutting mounting rings 9 on the two cutting shafts 7 are arranged in a staggered manner to ensure the crushing effect. A driving member is provided under the two cutting shafts 7, and the two cutting shafts 7 are driven to move by the driving member, so that the distance between the crushing knives 11 on the two cutting shafts 7 can be adjusted to meet the cutting requirements of multiple types of waste paper.

[0020] Furthermore, the cutting unit also includes two mounting plates 3, each of which is provided with two mounting blocks 4. The four mounting blocks 4 are connected to two conveying rollers 6 through a main shaft 5. The two conveying rollers 6 are located directly above the two cutting shafts 7 to achieve stable conveying of waste paper.

[0021] like Figure 6 As shown, two sets of driving units are arranged on one side of the shredding box body 1, and the driving unit includes a motor 24. The output shaft of the motor 24 extends into the shredding box body 1 and is provided with a synchronous wheel 25. One end of the main shaft 5 and the cutting shaft 7 is provided with a synchronous wheel 1 23. The synchronous wheel 25 and the two synchronous wheels 1 23 are sleeved with a synchronous belt 26. A tensioning wheel 27 for tensioning the synchronous belt 26 is arranged on one side of the inner wall of the shredding box body 1 to ensure stable transmission.

[0022] like Figure 4As shown, the driving member includes a fixed shaft 13, which is fixedly connected to the inner wall of the shredding box body 1, and a plurality of connecting plates 12 are sleeved on the fixed shaft 13. One side of the connecting plate 12 is sleeved with the cutting shaft 7, and the connecting plates 12 are rotatably connected to the cutting mounting ring 9 respectively. A driving plate 20 is provided at the end of the cutting shaft 7, and the ends of the two driving plates 20 rotate through the shaft body. A cylinder 21 for driving the shaft body to move up and down is provided in the shredding box body 1. The cylinder 21 is rotatably connected to the inner wall of the shredding box body 1 through a fixed block 22. The shaft body is driven to move up and down by the cylinder 21, so as to adjust the distance between the shredding knives 11 on the two cutting shafts 7. At the same time, when cutting waste paper, the cylinder 21 is controlled to make the driving plate 20 drive the two cutting shafts 7 to perform reciprocating arc motion with the central axis of the fixed shaft 13 as the center of the circle, which is compared with the simple linear motion. The cutting action has a more complicated cutting path. For waste paper, which has a variety of materials (such as multiple layers of paper, paper with different fiber directions, etc.), the arc-shaped cutting knife can cut the waste paper from multiple angles. For example, when cutting some thicker multiple layers of waste paper, the arc-shaped cutting path can better cut into the gaps between the papers, making the cutting more precise and able to cut the waste paper into smaller and more uniform fragments. The arc-shaped reciprocating rotation makes the contact mode between the crushing knife 11 and the waste paper more diverse. During straight-line cutting, the friction between the crushing knife 11 and the waste paper is mainly concentrated on one side of the blade, which easily causes this side to wear faster. The arc-shaped motion allows different parts of the blade to contact the waste paper in turn, so that the wear is more evenly distributed on the blade, which can extend the service life of the cutting knife and reduce the maintenance cost of the equipment.

[0023] Furthermore, a plurality of adjustment plates 14 are sleeved on the fixed shaft 13, and the plurality of adjustment plates 14 are respectively connected to the connecting plate 12, a limit seat 15 is arranged on one side of the adjustment plate 14, a through slide groove 16 corresponding to the limit seat 15 is provided on the shredding box body 1, two limit posts 18 are sleeved on the limit seat 15, and a limit plate 17 is arranged at one end of the two limit posts 18, and a plurality of limit holes 19 corresponding to the limit posts 18 are provided on the shredding box body 1, the limit posts 18 are separated from the limit holes 19 by pulling the limit plates 17, and then the adjustment plate 14 is pushed, thereby driving the connecting plate 12, the cutting mounting ring 9 and the shredding knife 11 to move, so as to adjust the distance between the shredding knives 11 on the same cutting shaft 7, so as to avoid paper jam when shredding thicker paper, and when the position of the shredding knife 11 is determined, the position of the shredding knife 11 is fixed by inserting the limit posts 18 into the corresponding limit holes 19.

[0024] like Figure 2 and Figure 7As shown, the spray device includes a pump body 32 and a water collecting tank 30 arranged at the bottom of the shredding box 1. The water inlet of the pump body 32 is connected to the water collecting tank 30 in the shredding box 1 through a liquid inlet pipe 33. The water outlet of the pump body 32 is provided with a liquid outlet pipe 34. The end of the liquid outlet pipe 34 extends to the interior of the shredding box 1 and is provided with a diverter 35. The diverter 35 is provided with multiple atomizing nozzles 36, which can spray the liquid in the water collecting tank 30 in an atomized manner to soften the paper scraps in the collection drawer 28, so as to facilitate subsequent recycling.

[0025] Furthermore, the compression unit includes two hydraulic cylinders 37, the output ends of the hydraulic cylinders 37 extend to the interior of the shredder box 1 and are provided with a plate body 38, the collection drawer 28 is provided with two through grooves corresponding to the plate body 38, the collection drawer 28 is slidably connected with a squeezing plate 31, and the bottom of the collection drawer 28 is provided with a plurality of seepage holes 29. When the paper scraps are wet, the hydraulic cylinder 37 drives the plate body 38 to move, and cooperates with the squeezing plate 31 to squeeze out the moisture in the paper scraps, and discharges it through the seepage holes 29, so that the paper scraps are easier to store.

[0026] The working process of this embodiment is as follows: the user puts the waste paper to be shredded into the shredder box 1 through the feeding port 2, and the waste paper falls on the conveying roller 6, and the motor 24 is started. The motor 24 drives the main shaft 5 to rotate through the synchronous wheel 25, the synchronous belt 26 and the synchronous wheel 1 23, thereby making the conveying roller 6 run, and the waste paper is smoothly conveyed to the cutting shaft 7. At the same time, the cutting shaft 7 rotates at a high speed driven by the motor, and the staggered shredding knives 11 are used to shred the waste paper. When encountering different types of waste paper, such as thicker cardboard or thinner printing paper, the cylinder 21 is started according to a preset program or manual instruction, pushing the shaft body to move up and down, driving the driving plate 20 to move, and then adjusting the position of the cutting shaft 7. In another embodiment, by controlling the cylinder 21, the driving plate 20 drives the two cutting shafts 7 to perform reciprocating arc motion with the central axis of the fixed shaft 13 as the center. Compared with the simple linear cutting action, its cutting path More complicatedly, for waste paper, which has a variety of materials (such as multiple layers of paper, paper with different fiber directions, etc.), the arc-shaped cutting knife can cut the waste paper from multiple angles, and the shredded paper scraps fall into the collection drawer 28 below. During this process, the pump body 32 is started to suck the liquid (such as water or a specific softener solution) in the water collection tank 30 through the liquid inlet pipe 33, and send it to the diverter 35 through the liquid outlet pipe 34, and then spray it out from the atomizing nozzle 36, so as to evenly atomize and spray the shredded paper scraps and the paper scraps in the collection drawer 28 to soften them. At regular intervals, the hydraulic cylinder 37 is started to push the plate body 38 to move, and the squeezing plate 31 slides relative to the collection drawer 28 under pressure to squeeze out the moisture in the paper scraps. The moisture flows back to the water collection tank 30 through the seepage hole 29 or is discharged from the shredded paper box 1. The dried paper scraps after squeezing are easier to store for a long time, reducing the risk of mildew.

[0027] 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. An automatic paper shredder, comprising a paper shredding box (1), characterized in that: The top of the shredding box (1) is provided with a feeding port (2); the top of the shredding box (1) is provided with a cutting unit for conveying and shredding waste paper; the front side of the shredding box (1) is plugged with a collecting drawer (28); the shredding box (1) is provided with a spray device for softening paper scraps in the collecting drawer (28) and a compression unit for squeezing wet paper scraps; The cutting unit comprises two cutting shafts (7), each of which is sleeved with a mounting sleeve (8), the outer circumferential surface of the mounting sleeve (8) being sleeved with a plurality of cutting mounting rings (9), a plurality of crushing knives (11) being arranged on the cutting mounting ring (9), the cutting mounting rings (9) being arranged in a staggered manner, a driving member being arranged below the two cutting shafts (7), and the two cutting shafts (7) being driven to move by the driving member, thereby adjusting the distance between the crushing knives (11) on the two cutting shafts (7) to meet the cutting requirements of different types of waste paper.

2. The automatic paper shredder according to claim 1, characterized in that: The cutting unit further comprises two mounting plates (3), each of which has two mounting blocks (4) disposed therein, the four mounting blocks (4) being connected to two conveying rollers (6) via a main shaft (5), the two conveying rollers (6) being located directly above the two cutting shafts (7).

3. The automatic paper shredder according to claim 2, characterized in that: Two sets of drive units are arranged on one side of the shredding box (1), the drive unit comprising a motor (24), the output shaft of the motor (24) extending into the shredding box (1) and provided with a second synchronous wheel (25), one end of the main shaft (5) and the cutting shaft (7) being provided with a first synchronous wheel (23), a synchronous belt (26) being sleeved on the second synchronous wheel (25) and the two first synchronous wheels (23), and a tensioning wheel (27) for tensioning the synchronous belt (26) being arranged on one side of the inner wall of the shredding box (1).

4. The automatic paper shredder according to claim 1, characterized in that: The driving member comprises a fixed shaft (13), the fixed shaft (13) being fixedly connected to the inner wall of the shredding box (1), a plurality of connecting plates (12) being sleeved on the fixed shaft (13), one side of the connecting plate (12) being sleeved to the cutting shaft (7), the connecting plates (12) being rotatably connected to the cutting mounting rings (9), the ends of the cutting shaft (7) being provided with driving plates (20), the ends of the two driving plates (20) being rotated through the shaft body, the shredding box (1) being provided with a cylinder (21) for driving the shaft body to move up and down, the cylinder (21) being rotatably connected to the inner wall of the shredding box (1) through a fixed block (22).

5. The automatic paper shredder according to claim 4, characterized in that: A plurality of adjustment plates (14) are sleeved on the fixed shaft (13), and the plurality of adjustment plates (14) are respectively connected to the connecting plate (12); a limit seat (15) is provided on one side of the adjustment plate (14); a through slide groove (16) corresponding to the limit seat (15) is provided on the shredding box body (1); two limit posts (18) are sleeved on the limit seat (15); a limit plate (17) is provided at one end of the two limit posts (18); and a plurality of limit holes (19) corresponding to the limit posts (18) are provided on the shredding box body (1).

6. The automatic paper shredder according to claim 1, characterized in that: The spray device comprises a pump body (32) and a water collecting tank (30) arranged at the bottom of a shredding box (1); a water inlet of the pump body (32) is connected to the water collecting tank (30) in the shredding box (1) through a liquid inlet pipe (33); a liquid outlet pipe (34) is arranged at the water outlet of the pump body (32); an end of the liquid outlet pipe (34) extends to the interior of the shredding box (1) and is provided with a flow divider (35); and a plurality of atomizing nozzles (36) are arranged on the flow divider (35).

7. The automatic paper shredder according to claim 1, characterized in that: The compression unit comprises two hydraulic cylinders (37), the output ends of the hydraulic cylinders (37) extending into the interior of the shredding box (1) and provided with a plate body (38), the collecting drawer (28) being provided with two through slots corresponding to the plate body (38), the collecting drawer (28) being slidably connected with a squeezing plate (31), and the bottom of the collecting drawer (28) being provided with a plurality of liquid seepage holes (29).

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