Paper shredder core

Abstract

A paper shredder core comprises a driving device, a vertical cutting tool and a transverse cutting tool, the driving device comprises a driving shaft, the vertical cutting tool comprises a first rotating shaft, the transverse cutting tool comprises a second rotating shaft, and a first transmission device and a second transmission device are arranged between the first rotating shaft and the second rotating shaft. One of the first rotating shaft and the second rotating shaft is a driving shaft, the other one is a driven shaft, the driving shaft is in transmission connection with the driving shaft, a gear shifting shaft sleeve is axially arranged on the driven shaft in a sliding mode, and the gear shifting shaft sleeve can be switched to be connected to the first transmission device or the second transmission device when axially sliding; the driving shaft drives the driven shaft through the first transmission device and drives the driven shaft through the second transmission device when the gear shifting shaft sleeve is connected with the second transmission device, and the transmission ratio of the first transmission device is different from that of the second transmission device. The shifting structure of the paper shredder core is simple and low in cost.

Description

Technical Field

[0001] The utility model relates to the technical field of shredders, and particularly relates to a shredder core. Background Art

[0002] The shredding speed of a conventional shredder core remains unchanged, so the shredding power and output torque of the machine are constant. The number of sheets that such a shredder core can shred is constant, and when there is a low requirement for confidentiality but a large number of sheets need to be shredded, it cannot meet the needs of users.

[0003] To solve the above technical problems, there has currently emerged a shredder core with an adjustable maximum number of shredded sheets. For example, a shredder core disclosed in a Japanese patent application with the application publication number JP1986038638A has a structure as Figure 1 shown. It is provided with an electromagnetic clutch 2a on the side of the driving device 1a, and a first transmission device 4a and a second transmission device 5a are arranged between the driving device 1a and the vertical cutting tool 3a. When the electromagnetic clutch 2a is closed, the driving shaft 6a of the driving device 1a is connected to the rotating shaft 7a of the vertical cutting tool 3a through the first transmission device 4a. When the electromagnetic clutch 2a is opened, the driving shaft 6a of the driving device 1a is connected to the rotating shaft 7a of the vertical cutting tool 3a through the second transmission device 5a. This shredder core controls the switch of the electromagnetic clutch 2a to selectively connect the first transmission device 4a and the second transmission device 5a between the driving shaft 6a and the rotating shaft 7a, and uses the different transmission ratios of the second transmission device 5a and the first transmission device 4a to change the rotation speed of the rotating shaft 7a of the vertical cutting tool 3a, thereby achieving the purpose of adjusting the maximum number of shredded sheets of the shredder.

[0004] However, the existing shredder core still has the following technical problems: The shifting structure uses an electromagnetic clutch 2a, which has a complex structure and high cost. The structure of the electromagnetic clutch 2a is as Figure 2 shown. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a shredder core with a simple shifting structure and low cost.

[0006] The technical solution of the present utility model is: a shredder core, including a driving device, a vertical cutting tool and a horizontal cutting tool. The driving device includes a driving shaft. The vertical cutting tool includes a first rotating shaft. The horizontal cutting tool includes a second rotating shaft. A first transmission device and a second transmission device are provided between the first rotating shaft and the second rotating shaft. One of the first rotating shaft and the second rotating shaft is the driving shaft and the other is the driven shaft. The driving shaft is in transmission connection with the driving shaft, and a shifting shaft sleeve is axially slidably provided on the driven shaft. When the shifting shaft sleeve axially slides, it can be switched to be connected to the first transmission device or the second transmission device. When the shifting shaft sleeve is connected to the first transmission device, the driving shaft drives the driven shaft through the first transmission device. When the shifting shaft sleeve is connected to the second transmission device, the driving shaft drives the driven shaft through the second transmission device. The transmission ratio of the first transmission device is different from that of the second transmission device.

[0007] The working principle of the shredder core of the present utility model is as follows:

[0008] Taking the first rotating shaft of the vertical cutting tool as the driving shaft and the second rotating shaft of the horizontal cutting tool as the driven shaft as an example for analysis; when the shifting shaft sleeve on the second rotating shaft is axially moved to be connected to the first transmission device, start the driving device. The driving device drives the driving shaft, and the driving shaft drives the driven shaft through the first transmission device, that is, the first rotating shaft drives the second rotating shaft through the first transmission device. When the shifting shaft sleeve on the second rotating shaft is axially moved to be connected to the second transmission device, start the driving device. The driving device drives the driving shaft, and the driving shaft drives the driven shaft through the second transmission device, that is, the first rotating shaft drives the second rotating shaft through the second transmission device. Since the transmission ratio of the first transmission device is different from that of the second transmission device, by axially switching the position of the shifting shaft sleeve, the second rotating shaft of the horizontal cutting tool can obtain different rotational speeds, that is, the shredding speed of the shredder core is adjustable. Furthermore, different cutting lengths can be obtained for the paper scraps in the horizontal cutting. When the cutting length of the paper scraps becomes longer, the shredding power will decrease, and the maximum number of shredded paper sheets of the shredder core will increase. When the cutting length of the paper scraps becomes shorter, the shredding power will increase, and the maximum number of shredded paper sheets of the shredder core will decrease. Similarly, when the second rotating shaft of the horizontal cutting tool is the driving shaft and the first rotating shaft of the vertical cutting tool is the driven shaft, the first rotating shaft of the vertical cutting tool can also obtain different rotational speeds by axially switching the position of the shifting shaft sleeve, and the shredding speed of the shredder core can be adjusted, and different cutting lengths can be obtained for the paper scraps in the longitudinal cutting. Whether different cutting lengths are obtained in the horizontal cutting or in the longitudinal cutting, the maximum number of shredded paper sheets of the shredder core can be made adjustable.

[0009] After adopting the above structure, the present utility model has the following advantages:

[0010] In the shredder core of the present utility model, a first transmission device and a second transmission device are arranged between the vertical cutting tool and the horizontal cutting tool, and a first rotating shaft of the vertical cutting tool and a second rotating shaft of the horizontal cutting tool are provided. One of them is connected to the driving shaft as the driving shaft, and the other is the driven shaft. By arranging a shifting structure on the driven shaft, it is possible to select whether the driving shaft drives the driven shaft through the first transmission device or the second transmission device, so as to change the rotational speed of the cutting tool corresponding to the driven shaft, and further realize the adjustment of the maximum number of shredded paper sheets of the shredder core. The shifting structure arranged on the driven shaft only needs to adopt a shifting shaft sleeve, and the structure is very simple and the cost is low.

[0011] Preferably, the first transmission device includes a first gear arranged on the first rotating shaft and a second gear arranged on the second rotating shaft. The first gear meshes with the second gear. The second transmission device includes a third gear arranged on the first rotating shaft and a fourth gear arranged on the second rotating shaft. The third gear meshes with the fourth gear. The transmission ratio of the first gear and the second gear is different from the transmission ratio of the third gear and the fourth gear. The two transmission devices adopt a gear meshing structure, and the transmission structure is more compact and has higher precision.

[0012] Preferably, the first gear or the third gear on the first rotating shaft is in transmission connection with the driving shaft. The shifting shaft sleeve is arranged on the second rotating shaft and is located between the second gear and the fourth gear. This setting makes the first rotating shaft the driving shaft and the second rotating shaft the driven shaft. By changing the rotational speed of the horizontal cutting tool, the purpose of adjusting the maximum number of shredded paper sheets of the shredder core is achieved; directly using the first gear or the third gear of the transmission device to realize the connection with the driving shaft can further simplify the overall structure.

[0013] Preferably, both the first gear and the third gear rotate synchronously with the first rotating shaft, the shifting shaft sleeve rotates synchronously with the second rotating shaft, both the second gear and the fourth gear are rotatably connected to the second rotating shaft, and a first limiting groove and a second limiting groove for radially limiting the shifting shaft sleeve are respectively provided on one side of the second gear and the fourth gear close to the shifting shaft sleeve. This setting does not require additional components, but only needs to reasonably set the connection relationship between the corresponding components and provide the corresponding limiting grooves to realize reliable transmission and shifting, and the overall structure is further simplified.

[0014] Preferably, a dial is further provided on the shifting shaft sleeve. This setting facilitates moving the shifting shaft sleeve by using the dial.

[0015] Preferably, a first shaft hole mating with the second rotating shaft is provided on the shift shaft sleeve. One of the inner sidewall of the first shaft hole and the outer sidewall of the second rotating shaft is provided with a first guiding block, and the other is provided with a first guiding groove. The shift shaft sleeve is radially limited on the second rotating shaft through the first guiding block and the first guiding groove. This setting uses the simple structure of the guiding block and the guiding groove to radially limit the shift shaft sleeve on the second rotating shaft, so that the shift shaft sleeve and the second rotating shaft can rotate synchronously.

[0016] Preferably, one of the inner sidewall of the first limiting groove and the outer sidewall of the shift shaft sleeve near the first limiting groove is provided with a second guiding block, and the other is provided with a second guiding groove. The shift shaft sleeve is radially limited on the second gear through the second guiding block and the second guiding groove. This setting uses the simple structure of the guiding block and the guiding groove to radially limit the shift shaft sleeve on the second gear, so that the shift shaft sleeve and the second gear can rotate synchronously.

[0017] Preferably, one of the inner sidewall of the second limiting groove and the outer sidewall of the shift shaft sleeve near the second limiting groove is provided with a third guiding block, and the other is provided with a third guiding groove. The shift shaft sleeve is radially limited on the fourth gear through the third guiding block and the third guiding groove. This setting uses the simple structure of the guiding block and the guiding groove to radially limit the shift shaft sleeve on the fourth gear, so that the shift shaft sleeve and the fourth gear can rotate synchronously.

[0018] Preferably, one of the inner sidewall of the first limiting groove and the outer sidewall of the shift shaft sleeve near the first limiting groove is provided with a first bump, and the other is provided with a first card slot into which the first bump can be engaged. This setting uses the simple structure of the bump and the card slot to also limit the axial position of the shift shaft sleeve radially limited on the second gear, so that it can be ensured that the shift shaft sleeve rotates synchronously with the second gear reliably without falling off.

[0019] Preferably, one of the inner sidewall of the second limiting groove and the outer sidewall of the shift shaft sleeve near the second limiting groove is provided with a second bump, and the other is provided with a second card slot into which the second bump can be engaged. This setting uses the simple structure of the bump and the card slot to also limit the axial position of the shift shaft sleeve radially limited on the fourth gear, so that it can be ensured that the shift shaft sleeve rotates synchronously with the fourth gear reliably without falling off. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an existing shredder core;

[0021] Figure 2 is a schematic structural diagram of an electromagnetic clutch of an existing shredder core;

[0022] Figure 3 Schematic diagram of the structure of the shredder core of the present utility model;

[0023] Figure 4 Another schematic diagram of the structure of the shredder core of the present utility model;

[0024] Figure 5 Explosion diagram of the horizontal cutting tool and the vertical cutting tool of the present utility model;

[0025] Figure 6 Schematic diagram of the structure of the shift shaft sleeve of the present utility model;

[0026] Figure 7 Schematic diagram of the structure of the fourth gear of the present utility model;

[0027] In the prior art figure: 1a - driving device, 2a - electromagnetic clutch, 3a - vertical cutting tool, 4a - first transmission device, 5a - second transmission device, 6a - driving shaft, 7a - rotating shaft;

[0028] In the figure of the present utility model: 1 - driving device, 2 - vertical cutting tool, 3 - horizontal cutting tool, 4 - driving shaft, 5 - first rotating shaft, 6 - second rotating shaft, 7 - first gear, 8 - third gear, 9 - second gear, 10 - fourth gear, 11 - shift shaft sleeve, 12 - first limiting groove, 13 - second limiting groove, 14 - paddle, 15 - first shaft hole, 16 - first guiding block, 17 - first guiding groove, 18 - second guiding block, 19 - second guiding groove, 20 - third guiding block, 21 - third guiding groove, 22 - first bump, 23 - fifth guiding block, 24 - second bump, 25 - second clamping groove, 26 - gear transmission mechanism, 27 - first mounting plate, 28 - second mounting plate, 29 - second shaft hole, 30 - third shaft hole, 31 - fourth guiding groove, 32 - fourth guiding block. Specific embodiments

[0029] The following will further illustrate the present utility model in conjunction with the accompanying drawings and embodiments.

[0030] Embodiment:

[0031] Such as Figures 3-7As shown in the figure, a shredder core includes a driving device 1, a vertical cutting tool 2 and a horizontal cutting tool 3. The driving device 1 includes a driving shaft 4. The vertical cutting tool 2 includes a first rotating shaft 5. The horizontal cutting tool 3 includes a second rotating shaft 6. A first transmission device and a second transmission device are provided between the first rotating shaft 5 and the second rotating shaft 6. One of the first rotating shaft 5 and the second rotating shaft 6 is a driving shaft and the other is a driven shaft. The driving shaft is in transmission connection with the driving shaft 4, and a shifting sleeve 11 is axially slidably provided on the driven shaft. When the shifting sleeve 11 slides axially, it can be switched to be connected to the first transmission device or the second transmission device. When the shifting sleeve 11 is connected to the first transmission device, the driving shaft drives the driven shaft through the first transmission device. When the shifting sleeve 11 is connected to the second transmission device, the driving shaft drives the driven shaft through the second transmission device. The transmission ratio of the first transmission device is different from that of the second transmission device.

[0032] In the shredder core of this embodiment, a first transmission device and a second transmission device are provided between the vertical cutting tool 2 and the horizontal cutting tool 3. The first rotating shaft 5 of the vertical cutting tool 2 and the second rotating shaft 6 of the horizontal cutting tool 3 are provided. One of them is connected to the driving shaft 4 as the driving shaft, and the other is the driven shaft. By providing a shifting structure on the driven shaft, it is possible to select whether the driving shaft drives the driven shaft through the first transmission device or the second transmission device, so as to change the rotational speed of the cutting tool corresponding to the driven shaft, and further realize the adjustment of the maximum number of shredded paper sheets of the shredder core. The shifting structure provided on the driven shaft only needs to adopt the shifting sleeve 11, and the structure is very simple and the cost is low.

[0033] The first transmission device includes a first gear 7 provided on the first rotating shaft 5 and a second gear 9 provided on the second rotating shaft 6. The first gear 7 meshes with the second gear 9. The second transmission device includes a third gear 8 provided on the first rotating shaft 5 and a fourth gear 10 provided on the second rotating shaft 6. The third gear 8 meshes with the fourth gear 10. The transmission ratio of the first gear 7 and the second gear 9 is different from the transmission ratio of the third gear 8 and the fourth gear 10. The two transmission devices adopt a gear meshing structure, and the transmission structure is more compact and the precision is higher.

[0034] The first gear 7 or the third gear 8 on the first rotating shaft 5 is in transmission connection with the driving shaft 4. The shifting sleeve 11 is provided on the second rotating shaft 6 and is located between the second gear 9 and the fourth gear 10. This setting makes the first rotating shaft 5 the driving shaft and the second rotating shaft 6 the driven shaft. By changing the rotational speed of the horizontal cutting tool 3, the purpose of adjusting the maximum number of shredded paper sheets of the shredder core is achieved; directly using the first gear 7 or the third gear 8 of the transmission device to realize the connection with the driving shaft 4 can further simplify the overall structure.

[0035] The first gear 7 and the third gear 8 both rotate synchronously with the first rotating shaft 5. The shift sleeve 11 rotates synchronously with the second rotating shaft 6. The second gear 9 and the fourth gear 10 are both rotatably connected to the second rotating shaft 6. On one side of the second gear 9 and the fourth gear 10 close to the shift sleeve 11, a first limiting groove 12 and a second limiting groove 13 for radially limiting the shift sleeve 11 are respectively provided. This setting does not require additional components, but only needs to reasonably set the connection relationship between the corresponding components and provide the corresponding limiting grooves to achieve reliable transmission and shifting, further simplifying the overall structure.

[0036] A paddle 14 is further provided on the shift sleeve 11. This setting facilitates the use of the paddle 14 to move the shift sleeve 11.

[0037] The shift sleeve 11 is provided with a first shaft hole 15 that cooperates with the second rotating shaft 6. On one of the inner side wall of the first shaft hole 15 and the outer side wall of the second rotating shaft 6, a first guiding block 16 is provided on one and a first guiding groove 17 is provided on the other. The shift sleeve 11 is radially limited on the second rotating shaft 6 through the first guiding block 16 and the first guiding groove 17. In this embodiment, the first guiding block 16 is axially provided on the inner side wall of the first shaft hole 15 of the shift sleeve 11, and the first guiding groove 17 is axially provided on the outer side wall of the second rotating shaft 6. This setting uses the simple structure of the guiding block and the guiding groove to radially limit the shift sleeve 11 on the second rotating shaft 6, so as to achieve the synchronous rotation of the shift sleeve 11 and the second rotating shaft 6.

[0038] Four first guiding blocks 16 are provided and are evenly arranged in the radial direction. The number and position of the first guiding grooves 17 match those of the first guiding blocks 16. This setting can make the radial connection between the shift sleeve 11 and the second rotating shaft 6 more reliable.

[0039] On one of the inner side wall of the first limiting groove 12 and the outer side wall of the shift sleeve 11 close to the first limiting groove 12, a second guiding block 18 is provided on one and a second guiding groove 19 is provided on the other. The shift sleeve 11 is radially limited on the second gear 9 through the second guiding block 18 and the second guiding groove 19. This setting uses the simple structure of the guiding block and the guiding groove to radially limit the shift sleeve 11 on the second gear 9, so as to achieve the synchronous rotation of the shift sleeve 11 and the second gear 9.

[0040] On one of the inner side wall of the second limiting groove 13 and the outer side wall of the shift shaft sleeve 11 close to the second limiting groove 13, a third guiding block 20 is provided, and on the other, a third guiding groove 21 is provided. The shift shaft sleeve 11 is radially limited on the fourth gear 10 through the third guiding block 20 and the third guiding groove 21. This setting uses the simple structure of the guiding block and the guiding groove to radially limit the shift shaft sleeve 11 on the fourth gear 10, so as to realize the synchronous rotation of the shift shaft sleeve 11 and the fourth gear 10.

[0041] Both the second guiding blocks 18 and the third guiding blocks 20 are provided with four and are evenly arranged in the radial direction. The numbers and positions of the second guiding grooves 19 and the third guiding grooves 21 respectively match those of the second guiding blocks 18 and the third guiding blocks 20. This setting can make the radial connection between the shift shaft sleeve 11 and the second gear 9 and the fourth gear 10 more reliable.

[0042] The second guiding blocks 18 and the third guiding blocks 20 are integrally formed on the outer side wall of the shift shaft sleeve 11. This setting can make the overall structure simpler and the processing more convenient.

[0043] On one of the inner side wall of the first limiting groove 12 and the outer side wall of the shift shaft sleeve 11 close to the first limiting groove 12, a first bump 22 is provided, and on the other, a first clamping groove that can be clamped into the first bump 22 is provided. For the structure of the first clamping groove, refer to the second clamping groove 25, and no schematic diagram is given in the figure. This setting uses the simple structure of the bump and the clamping groove to also limit the axial position of the shift shaft sleeve 11 radially limited on the second gear 9, so as to ensure that the shift shaft sleeve 11 can reliably rotate synchronously with the second gear 9 without falling off.

[0044] On one of the inner side wall of the second limiting groove 13 and the outer side wall of the shift shaft sleeve 11 close to the second limiting groove 13, a second bump 24 is provided, and on the other, a second clamping groove 25 that can be clamped into the second bump 24 is provided. This setting uses the simple structure of the bump and the clamping groove to also limit the axial position of the shift shaft sleeve 11 radially limited on the fourth gear 10, so as to ensure that the shift shaft sleeve 11 can reliably rotate synchronously with the fourth gear 10 without falling off.

[0045] The second shaft hole 29 and the third shaft hole 30 that are respectively matched with the first rotating shaft 5 are provided on the first gear 7 and the third gear 8. A fourth guiding groove 31 is axially provided on the outer side wall of the first rotating shaft 5, a fourth guiding block 32 is axially provided on the inner side wall of the second shaft hole 29, and a fifth guiding block 23 is axially provided on the inner side wall of the third shaft hole 30. The first gear 7 is radially limited on the first rotating shaft 5 through the cooperation of the fourth guiding block 32 and the fourth guiding groove 31, and the third gear 8 is radially limited on the first rotating shaft 5 through the cooperation of the fifth guiding block 23 and the fourth guiding groove 31. This setting uses the simple structure of the guiding block and the guiding groove to radially limit the first gear 7 and the third gear 8 on the first rotating shaft 5, so as to realize the synchronous rotation of the first gear 7 and the third gear 8 with the first rotating shaft 5.

[0046] Four fourth guiding grooves 31 are provided and are evenly arranged in the radial direction. The number and positions of the fourth guiding block 32 and the fifth guiding block 23 match those of the fourth guiding groove 31. This setting can make the radial connection between the first rotating shaft 5 and the first gear 7 and the third gear 8 more reliable.

[0047] The first gear 7 or the third gear 8 is in transmission connection with the driving shaft 4 through the gear transmission mechanism 26. The gear transmission mechanism 26 has a more compact structure and higher precision.

[0048] The first rotating shaft 5 and the second rotating shaft 6 are arranged in parallel. The first mounting plate 27 and the second mounting plate 28 that are axially spaced and mounted on the first rotating shaft 5 and the second rotating shaft 6 are further included. The first gear 7 and the second gear 9 are attached to one side of the first mounting plate 27 close to the second mounting plate 28, and the third gear 8 and the fourth gear 10 are attached to one side of the second mounting plate 28 close to the first mounting plate 27. This setting can make the installation of the first gear 7, the second gear 9, the third gear 8 and the fourth gear 10 more stable.

[0049] The second mounting plate 28 is located outside the first mounting plate 27. The driving device 1 is mounted on the first mounting plate 27 and the driving shaft 4 is in transmission connection with the first gear 7. This setting can facilitate the installation and connection of the driving device 1.

[0050] The working principle of the shredder core in this embodiment is as follows:

[0051] In this embodiment, the first rotating shaft 5 of the vertical cutting tool 2 is the driving shaft, while the second rotating shaft 6 of the horizontal cutting tool 3 is the driven shaft. By changing the rotation speed of the horizontal cutting tool 3, the purpose of adjusting the maximum number of shredded paper sheets of the shredder core is achieved. When the shift sleeve 11 on the second rotating shaft 6 is axially moved into the first limiting groove 12 of the second gear 9, the shift sleeve 11 is radially limited on the second gear 9 through the second guiding block 18 and the second guiding groove 19, and is axially limited on the second gear 9 through the first bump 22 and the first clamping groove. In addition, the shift sleeve 11 is also radially limited on the second rotating shaft 6 through the first guiding block 16 and the first guiding groove 17, so that the second gear 9 can rotate synchronously with the second rotating shaft 6 through the shift sleeve 11, and the shift sleeve 11 will not fall off the second gear 9 during the rotation process. Start the driving device 1, the driving shaft 4 drives the first gear 7, the third gear 8 and the first rotating shaft 5 to rotate synchronously, the vertical cutting tool 2 works, the first gear 7 rotates to drive the second gear 9 meshing with it to rotate, and the third gear 8 rotates to drive the fourth gear 10 meshing with it to rotate. However, since the shift sleeve 11 is connected to the second gear 9 and separated from the fourth gear 10, the second gear 9 will drive the second rotating shaft 6 to rotate synchronously while the fourth gear 10 idles on the second rotating shaft 6, and the horizontal cutting tool 3 works. When the shift sleeve 11 on the second rotating shaft 6 is axially moved into the second limiting groove 13 of the fourth gear 10, the shift sleeve 11 is radially limited on the fourth gear 10 through the third guiding block 20 and the third guiding groove 21, and is axially limited on the fourth gear 10 through the second bump 24 and the second clamping groove 25. In addition, the shift sleeve 11 is also radially limited on the second rotating shaft 6 through the first guiding block 16 and the first guiding groove 17, so that the fourth gear 10 can rotate synchronously with the second rotating shaft 6 through the shift sleeve 11, and the shift sleeve 11 will not fall off the fourth gear 10 during the rotation process. Start the driving device 1, the driving shaft 4 drives the first gear 7, the third gear 8 and the first rotating shaft 5 to rotate synchronously, the vertical cutting tool 2 works, the first gear 7 rotates to drive the second gear 9 meshing with it to rotate, and the third gear 8 rotates to drive the fourth gear 10 meshing with it to rotate. However, since the shift sleeve 11 is connected to the fourth gear 10 and separated from the second gear 9, the fourth gear 10 will drive the second rotating shaft 6 to rotate synchronously while the second gear 9 idles on the second rotating shaft 6, and the horizontal cutting tool 3 works.When the shift shaft sleeve 11 axially moves into the first limit groove 12 of the second gear 9, the power output by the drive device 1 is transmitted to the cross-cutting tool 3 through the first gear 7 and the second gear 9. When the shift shaft sleeve 11 axially moves into the second limit groove 13 of the fourth gear 10, the power output by the drive device 1 is transmitted to the cross-cutting tool 3 through the third gear 8 and the fourth gear 10. Since the transmission ratio of the first gear 7 and the second gear 9 is different from that of the third gear 8 and the fourth gear 10, axially switching the position of the shift shaft sleeve 11 can enable the second rotating shaft 6 of the cross-cutting tool 3 to obtain different rotational speeds, that is, the shredding speed of the shredder core is adjustable. Furthermore, different cutting lengths of the shredded paper can be obtained. When the cutting length of the shredded paper becomes longer, the shredding power will decrease, and the maximum number of shredded sheets of the shredder core will increase. When the cutting length of the shredded paper becomes shorter, the shredding power will increase, and the maximum number of shredded sheets of the shredder core will decrease.;

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. For example, taking the second rotating shaft 6 of the cross-cutting tool 3 as the driving shaft and the first rotating shaft 5 of the vertical cutting tool 2 as the driven shaft, connecting the second rotating shaft 6 to the drive device 1 in a transmission manner, and arranging the shift shaft sleeve 11 on the first rotating shaft 5, the purpose of adjusting the maximum number of shredded sheets of the shredder core can be achieved by changing the rotational speed of the vertical cutting tool 2, which also falls within the protection scope of the present invention.

Claims

1. A paper shredder core, comprising a driving device (1), a vertical cutting tool (2) and a horizontal cutting tool (3), wherein the driving device (1) comprises a driving shaft (4), the vertical cutting tool (2) comprises a first rotating shaft (5), and the horizontal cutting tool (3) comprises a second rotating shaft (6), characterized in that: A first transmission device and a second transmission device are provided between the first rotating shaft (5) and the second rotating shaft (6); one of the first rotating shaft (5) and the second rotating shaft (6) is a driving shaft and the other is a driven shaft; the driving shaft is drivingly connected to the driving shaft (4) and a shift shaft sleeve (11) is axially slidably provided on the driven shaft; the shift shaft sleeve (11) can be switched to the first transmission device or the second transmission device when axially sliding; when the shift shaft sleeve (11) is connected to the first transmission device, the driving shaft drives the driven shaft through the first transmission device; when the shift shaft sleeve (11) is connected to the second transmission device, the driving shaft drives the driven shaft through the second transmission device; the transmission ratio of the first transmission device is different from the transmission ratio of the second transmission device.

2. A paper shredder core according to claim 1, characterized in that: The first transmission device comprises a first gear (7) arranged on a first rotating shaft (5) and a second gear (9) arranged on a second rotating shaft (6), the first gear (7) meshing with the second gear (9), the second transmission device comprises a third gear (8) arranged on the first rotating shaft (5) and a fourth gear (10) arranged on the second rotating shaft (6), the third gear (8) meshing with the fourth gear (10), and the transmission ratio between the first gear (7) and the second gear (9) is different from the transmission ratio between the third gear (8) and the fourth gear (10).

3. A paper shredder core according to claim 2, characterized in that: The first gear (7) or the third gear (8) on the first rotating shaft (5) is transmission-connected to the drive shaft (4), and the shift sleeve (11) is arranged on the second rotating shaft (6) and is located between the second gear (9) and the fourth gear (10).

4. A paper shredder core according to claim 3, characterized in that: The first gear (7) and the third gear (8) both rotate synchronously with the first rotating shaft (5), the shift shaft sleeve (11) rotates synchronously with the second rotating shaft (6), the second gear (9) and the fourth gear (10) are both rotationally connected to the second rotating shaft (6), and the second gear (9) and the fourth gear (10) are respectively provided with a first limiting groove (12) and a second limiting groove (13) on one side of the second gear (9) and the fourth gear (10) close to the shift shaft sleeve (11) for radially limiting the shift shaft sleeve (11).

5. A paper shredder core according to claim 1, characterized in that: The shift shaft sleeve (11) is also provided with a paddle (14).

6. A paper shredder core according to claim 4, characterized in that: The shift shaft sleeve (11) is provided with a first shaft hole (15) matched with the second rotating shaft (6); a first guide block (16) is provided on one of the inner side wall of the first shaft hole (15) and an outer side wall of the second rotating shaft (6), and a first guide groove (17) is provided on the other; the shift shaft sleeve (11) is radially limited on the second rotating shaft (6) by the first guide block (16) and the first guide groove (17).

7. A paper shredder core according to claim 4, characterized in that: A second guide block (18) is arranged on one of the inner side wall of the first limiting groove (12) and a second guide groove (19) is arranged on the other side of the outer side wall of the shift shaft sleeve (11) close to the first limiting groove (12), and the shift shaft sleeve (11) is radially limited on the second gear (9) by the second guide block (18) and the second guide groove (19).

8. A paper shredder core according to claim 4, characterized in that: A third guide block (20) is arranged on one of the inner side wall of the second limiting groove (13) and a third guide groove (21) is arranged on the other side of the outer side wall of the shift shaft sleeve (11) close to the second limiting groove (13); the shift shaft sleeve (11) is radially limited on the fourth gear (10) by the third guide block (20) and the third guide groove (21).

9. A paper shredder core according to claim 7, characterized in that: The inner side wall of the first limiting groove (12) and the outer side wall of the shift shaft sleeve (11) on the side close to the first limiting groove (12) are provided with a first protrusion (22) on one of them and a first slot capable of being inserted into the first protrusion (22) is provided on the other.

10. A paper shredder core according to claim 8, characterized in that: A second protrusion (24) is arranged on one of the inner side wall of the second limiting groove (13) and an outer side wall of the shift shaft sleeve (11) on a side close to the second limiting groove (13), and a second slot (25) capable of being inserted into the second protrusion (24) is arranged on the other.

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