Inlet structure of paper shredder

Abstract

The utility model relates to the technical field of paper shredders, in particular to a paper shredder inlet structure which comprises a rack, a control unit and a driving mechanism are arranged on the rack, a paper twisting mechanism is arranged on one side of an inlet of the paper shredder and comprises a paper twisting shaft, and one end of the paper twisting shaft is axially fixed and circumferentially rotationally connected with a transmission gear. The transmission gear is in transmission connection with the paper twisting shaft through a clutch mechanism, one end of the driving mechanism is in transmission connection with the transmission gear, a paper stock detection mechanism is arranged on the paper twisting mechanism, and the paper stock detection mechanism and the clutch mechanism are both connected with the control unit. If the paper is not fed, the clutch mechanism cuts off power transmission between the transmission gear and the paper twisting shaft, and the paper twisting shaft and the paper twisting wheel stop rotating, so that abrasion caused by rotation of the paper twisting wheel when no paper exists at the inlet of the paper shredder is avoided, and the service life of the paper twisting wheel and the friction block is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of paper shredders, in particular to an inlet structure of a paper shredder. Background Art

[0002] The shredder is composed of a set of rotating blades, a paper comb and a drive motor. Paper is fed in between the interlocking blades and cut into many small pieces of paper to achieve the purpose of confidentiality. The shredding method refers to the shape of the paper after it is shredded by the shredder. According to the composition of the shredder, the existing shredding methods include: broken, granular, segmented, foamy, strip, filamentous, etc.

[0003] In a traditional paper shredder, after the paper is shredded, the paper pickup wheel will still rotate, causing wear between the paper pickup wheel and the friction block, which will reduce the life of the paper pickup wheel or the friction block over time. Based on the above problem, the present application provides an inlet structure for a paper shredder. Utility Model Content

[0004] The utility model aims to provide an inlet structure of a paper shredder to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shredder inlet structure, comprising a frame, on which a control unit and a driving mechanism are arranged, a paper picking mechanism is arranged on one side of the shredder inlet, the paper picking mechanism comprises a paper picking shaft, one end of the paper picking shaft is axially fixed and circumferentially rotatably connected to a transmission gear, characterized in that the transmission gear is connected to the paper picking shaft through a clutch mechanism, one end of the driving mechanism is connected to the transmission gear, a paper stock detection mechanism is arranged on the paper picking mechanism, and both the paper stock detection mechanism and the clutch mechanism are connected to the control unit.

[0006] By adopting the above technical solution: a paper stock detection mechanism is provided on the paper picking mechanism, the paper stock detection mechanism is used to detect the amount of paper at the inlet of the shredder, a clutch mechanism is set between the paper picking shaft and the transmission gear of the paper picking mechanism, wherein the transmission gear is used to transmit power, when the paper stock detection mechanism detects that there is no paper at the inlet of the shredder, the clutch mechanism cuts off the power transmission between the transmission gear and the paper picking shaft, the paper picking shaft and the paper picking wheel stop rotating, thereby avoiding the wear of the paper picking wheel when there is no paper at the inlet of the shredder, and ensuring the service life of the paper picking wheel and the friction block.

[0007] The clutch mechanism comprises a fixed bracket, a pull rod, a static shaft sleeve, and a dynamic shaft sleeve. A motor is installed on the fixed bracket, and an output end of the motor is connected to a separation wheel. One end of the pull rod is rotatably connected to the separation wheel and the rotating connection is eccentrically arranged with respect to the separation wheel. The static shaft sleeve is fixedly connected to the paper picking shaft, the dynamic shaft sleeve and the paper picking shaft are circumferentially fixed and axially slidably connected, and the dynamic shaft sleeve is arranged between the static shaft sleeve and the transmission gear, an inner tooth block is arranged in the inner hole of the transmission gear, one end of the dynamic shaft sleeve is provided with an outer tooth block meshing with the inner tooth block, an elastic element is arranged between the static shaft sleeve and the dynamic shaft sleeve, and the elastic element is used to squeeze the shaft sleeve to mesh the outer tooth block with the inner tooth block, a separation protrusion is provided at one end of the pull rod away from the separation wheel, and this end of the pull rod is axially fixed and radially slidably connected with the dynamic shaft sleeve, a separation ring in contact with the separation protrusion is provided on the dynamic shaft sleeve, and the separation protrusion abuts against the separation ring to push the moving shaft sleeve to disengage the outer tooth block from the meshing with the inner tooth block.

[0008] By adopting the above technical solution: during normal operation, the separation protrusion and the separation ring do not contact each other, and the elastic element squeezes the push sleeve to engage the outer tooth block with the inner tooth block. At this time, the rigid connection between the transmission gear and the paper pickup shaft can transmit power. When it is necessary to cut off the power transmission between the transmission gear and the paper pickup shaft, the motor drives the separation wheel to rotate and then drives the pull rod to slide. After the separation protrusion contacts the separation ring, the moving sleeve is lifted, and the outer tooth block and the inner tooth block are disengaged. At this time, the transmission gear is idling, and the paper pickup wheel stops rotating.

[0009] The paper picking mechanism includes a base, a support plate is obliquely arranged on one side of the base away from the inlet, a paper clamping mechanism is arranged on the support plate, a notch corresponding to the paper picking wheel is opened on the base, an elastic mechanism is arranged in the notch, the elastic mechanism includes a box body, the opening of the box body faces upward, a flap is arranged in the box body, one end of the flap is rotatably connected to the inner wall of the box body, and the other end of the flap is connected to the bottom surface of the box body through a cylindrical spring, a friction block is arranged on the top of the flap, and the cylindrical spring presses the friction block against the paper picking wheel.

[0010] By adopting the above technical solution: the paper clamping mechanism is used to clamp the paper, the elastic mechanism is arranged on the base, the top of the elastic mechanism is provided with a friction block, and then the elastic mechanism abuts the paper pickup wheel against the friction block to ensure the use effect of the paper pickup mechanism.

[0011] The paper clamping mechanism includes a paper clamping board, a synchronous wheel and two racks meshing with the synchronous wheel. The paper clamping board is symmetrically arranged on a support plate. The synchronous wheel is rotatably installed on the back side of the support plate. The two racks are slidably connected to the back side of the support plate. A sliding groove corresponding to the paper clamping board is provided on the support plate. The bottom end of the paper clamping board passes through the sliding groove and is fixedly connected to one end of the corresponding rack.

[0012] By adopting the above technical solution: the paper clamping mechanism can adjust the paper clamping board on the pallet according to the paper width, and at the same time, the synchronous wheel and the rack are provided to ensure that the paper has a good centering on the pallet, thereby improving the use effect of the shredder.

[0013] The paper stock detection mechanism comprises an infrared sensor, and the upper end surface of the support plate is provided with a groove for installing the infrared sensor.

[0014] By adopting the above technical solution: an infrared sensor is installed on the pallet, and the presence of paper on the pallet will block the infrared sensor. If there is no paper, the infrared sensor will not be blocked. By cooperating with a paper clamping mechanism with a centering function, the infrared sensor is installed in the middle of the pallet, so that it can accurately detect whether there is paper on the pallet.

[0015] A travel switch connected to the control unit is installed on the fixed bracket, and a cam edge abutting against the trigger end of the travel switch is provided on the separation wheel. Two recesses are provided on the cam edge. When one of the recesses abuts against the trigger end of the travel switch, the outer tooth block is engaged or disengaged with the inner tooth block.

[0016] By adopting the above technical solution: installing a travel switch for the control unit to judge the state of the clutch mechanism, the stability of the shredder during use is improved.

[0017] The paper pickup shaft has a non-circular cross-section, the inner hole of the movable sleeve is adapted to the cross-sectional shape of the paper pickup shaft, the pull rod has a separation protrusion and one end is provided with a straight slot, the pull rod is sleeved on the movable sleeve through the straight slot, the elastic element is a coupling spring, the coupling spring is sleeved on the paper pickup shaft, one end of the coupling spring is abutted against the static sleeve, and the other end is abutted against the movable sleeve.

[0018] The driving mechanism is a servo motor.

[0019] Technical effects and advantages of the utility model:

[0020] 1. In this solution, when the paper stock detection mechanism detects that there is no paper at the inlet of the shredder, the power transmission between the transmission gear and the pickup shaft is cut off through the clutch mechanism, and the pickup shaft and the pickup wheel stop rotating, thereby avoiding the wear of the pickup wheel when there is no paper at the inlet of the shredder, thereby ensuring the service life of the pickup wheel and the friction block.

[0021] 2. In this scheme, when the paper pickup wheel works normally, the separation protrusion and the separation ring are not in contact, and the elastic element squeezes the push sleeve to engage the outer tooth block with the inner tooth block. At this time, the rigid connection between the transmission gear and the paper pickup shaft can transmit power. When it is necessary to cut off the power transmission between the transmission gear and the paper pickup shaft, the motor drives the separation wheel to rotate and then drives the pull rod to slide. After the separation protrusion contacts the separation ring, the moving sleeve is lifted, and the outer tooth block and the inner tooth block are disengaged. At this time, the transmission gear is idling and the paper pickup wheel stops rotating.

[0022] 3. In this solution, an elastic mechanism is provided on the base, and a friction block is provided on the top of the elastic mechanism, so that the elastic mechanism abuts the paper pickup wheel against the friction block to ensure the use effect of the paper pickup mechanism.

[0023] 4. In this solution, the paper clamping mechanism can adjust the paper clamping board on the pallet according to the paper width, and synchronous wheels and racks are provided at the same time, which can ensure that the paper has a good centering function on the pallet and improve the use effect of the shredder. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structural diagram of the inlet structure of the shredder provided for this application;

[0025] Figure 2 A schematic diagram of the overall structure of the clutch mechanism provided in this application;

[0026] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 4 A partial exploded structural diagram of the clutch mechanism provided in this application;

[0028] Figure 5 A schematic diagram of the exploded structure of the paper picking mechanism provided in this application;

[0029] Figure 6 A schematic diagram of the overall structure of the paper clamping mechanism provided in this application;

[0030] Figure 7 This is a schematic diagram of the bottom-up structure of the paper clamping mechanism provided in this application.

[0031] Figure numerals: 1, frame; 2, paper pickup shaft; 3, paper pickup wheel; 4, transmission gear; 401, inner gear block; 5, pull rod; 501, separation protrusion; 502, straight slot; 6, static shaft sleeve; 7, dynamic shaft sleeve; 701, outer gear block; 702, separation ring; 8, motor; 9, separation wheel; 901, cam edge; 902, depression; 10, engagement spring; 11, base; 1101, notch; 12, box body; 13, flap; 14, friction block; 15, cylindrical spring; 16, support plate; 17, clipboard; 18, groove; 19, travel switch; 20, synchronous wheel; 21, rack; 22, fixed bracket. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] This embodiment provides Figure 1 A shredder inlet structure is shown, and the shredder has a frame 1, on which a control unit and a driving mechanism are provided. Specifically, a paper picking mechanism is provided on one side of the shredder inlet, and the paper picking mechanism includes a paper picking shaft 2, one end of the paper picking shaft 2 is axially fixed and circumferentially rotatably connected to a transmission gear 4, the transmission gear 4 is transmission-connected to the paper picking shaft 2 through a clutch mechanism, one end of the driving mechanism is transmission-connected to the transmission gear 4, and the transmission connection can adopt gear transmission or toothed belt transmission, a paper stock detection mechanism is provided on the paper picking mechanism, and the paper stock detection mechanism and the clutch mechanism are both connected to the control unit, and the driving mechanism of this embodiment is a servo motor 8. Among them, the paper stock detection mechanism is used to detect the amount of paper at the inlet of the shredder. A clutch mechanism is set between the paper picking shaft 2 of the paper picking mechanism and the transmission gear 4. The transmission gear 4 is used to transmit power. When the paper stock detection mechanism detects that there is no paper at the inlet of the shredder, the clutch mechanism cuts off the power transmission between the transmission gear 4 and the paper picking shaft 2, and the paper picking shaft 2 and the paper picking wheel 3 stop rotating, thereby avoiding the wear of the paper picking wheel 3 when there is no paper at the inlet of the shredder, thereby ensuring the service life of the paper picking wheel 3 and the friction block 14.

[0034] like Figure 2 and Figure 3As shown, the clutch mechanism includes a fixed bracket 22, a pull rod 5, a static shaft sleeve 6, and a dynamic shaft sleeve 7. A motor 8 is installed on the fixed bracket 22. The output end of the motor 8 is connected to a separation wheel 9. One end of the pull rod 5 is rotatably connected to the separation wheel 9 and the rotation connection is eccentric to the separation wheel 9. The static shaft sleeve 6 is fixedly connected to the paper pickup shaft 2. The dynamic shaft sleeve 7 is circumferentially fixed and axially slidably connected to the paper pickup shaft 2, and the dynamic shaft sleeve 7 is arranged between the static shaft sleeve 6 and the transmission gear 4. Specifically, as shown in FIG. Figure 4 As shown, an inner tooth block 401 is provided in the inner hole of the transmission gear 4, an outer tooth block 701 meshing with the inner tooth block 401 is provided at one end of the moving sleeve 7, an elastic element is provided between the static sleeve 6 and the moving sleeve 7, the elastic element is used to squeeze the sleeve 7 to mesh the outer tooth block 701 with the inner tooth block 401, a separation protrusion 501 is provided at the end of the pull rod 5 away from the separation wheel 9, and this end of the pull rod 5 is axially fixed and radially slidably connected with the moving sleeve 7, a separation ring 702 in contact with the separation protrusion 501 is provided on the moving sleeve 7, and the separation protrusion 501 abuts against the separation ring 702 to start the moving sleeve 7 to disengage the outer tooth block 701 from the inner tooth block 401.

[0035] Furthermore, the pickup shaft 2 has a non-circular cross section. The pickup shaft 2 of this embodiment adopts a regular hexagonal prism, and the movable shaft sleeve 7 also adopts a regular hexagonal prism inner hole adapted to the pickup shaft 2, ensuring that the movable shaft sleeve 7 and the pickup shaft 2 are circumferentially fixed and circumferentially slidingly matched. Figure 4 As shown, the pull rod 5 has a separation protrusion 501 at one end thereof and a straight slot 502 is opened. The pull rod 5 is sleeved on the movable shaft sleeve 7 through the straight slot 502. One end of the pull rod 5 moves in an arc, and the other end of the pull rod 5 completes the horizontal movement of the separation protrusion 501 through the straight slot 502. The elastic element of this embodiment adopts a coupling spring 10, and the coupling spring 10 is sleeved on the paper pickup shaft 2. One end of the coupling spring 10 is against the static shaft sleeve 6, and the other end is against the movable shaft sleeve 7.

[0036] During normal operation, the separation protrusion 501 does not contact the separation ring 702, and the elastic element squeezes the push sleeve 7 to engage the outer tooth block 701 with the inner tooth block 401. At this time, the rigid connection between the transmission gear 4 and the paper pickup shaft 2 can transmit power. When it is necessary to cut off the power transmission between the transmission gear 4 and the paper pickup shaft 2, the motor 8 drives the separation wheel 9 to rotate and then drives the pull rod 5 to slide. After the separation protrusion 501 contacts the separation ring 702, the moving sleeve 7 is lifted, and the outer tooth block 701 is disengaged from the inner tooth block 401. At this time, the transmission gear 4 is idling and the paper pickup wheel 3 stops rotating.

[0037] Furthermore, if Figure 1 As shown, the paper picking mechanism includes a base 11, and a support plate 16 is inclinedly arranged on one side of the base 11 away from the inlet, and a paper clamping mechanism is arranged on the support plate 16. Figure 5As shown, a notch 1101 corresponding to the pickup roller 3 is provided on the base 11, and an elastic mechanism is provided in the notch 1101. The elastic mechanism includes a box body 12, the opening of the box body 12 faces upward, and a flap 13 is provided in the box body 12. One end of the flap 13 is rotatably connected to the inner wall of the box body 12, and the other end of the flap 13 is connected to the bottom surface of the box body 12 through a cylindrical spring 15. A friction block 14 is provided at the top of the flap 13, and the cylindrical spring 15 makes the friction block 14 abut against the pickup roller 3. The elastic mechanism is provided on the base 11, and a friction block 14 is provided at the top of the elastic mechanism, so that the pickup roller 3 abuts against the friction block 14, thereby ensuring the use effect of the pickup mechanism.

[0038] like Figure 6 and Figure 7 As shown, the paper clamping mechanism includes a paper clamping board 17, a synchronous wheel 20 and a rack 21 meshed with the synchronous wheel 20. The paper clamping board 17 is symmetrically arranged on the pallet 16, and the synchronous wheel 20 is rotatably installed on the back of the pallet 16. Two racks 21a, 21b are slidably connected to the back of the pallet 16. A slide groove corresponding to the paper clamping board 17 is opened on the pallet 16. The bottom end of the paper clamping board 17 passes through the slide groove and is fixedly connected to one end of the corresponding rack 21. The paper mechanism can adjust the paper clamping board 17 on the pallet 16 according to the width of the paper. At the same time, the synchronous wheel 20 and the rack 21 are arranged, which can ensure that the paper has good centering on the pallet 16, thereby improving the use effect of the shredder.

[0039] The paper quantity detection mechanism of this embodiment includes an infrared sensor, such as Figure 6 As shown, a groove 18 for installing an infrared sensor is provided on the upper end surface of the support plate 16, and the infrared sensor is installed in the groove 18. Since the infrared sensor is installed on the support plate 16, the presence of paper on the support plate 16 will block the infrared sensor, and if there is no paper, the infrared sensor will not be blocked. In another embodiment, the infrared sensor is installed in the middle of the support plate 16 by cooperating with a paper clamping mechanism with a centering function, that is, the infrared sensor is installed at the symmetrical center of the two paper clamping boards 17, so that it can accurately detect whether there is paper on the support plate 16.

[0040] like Figure 3 As shown, in order to improve the stability of the shredder during use, a travel switch 19 connected to the control unit is installed on the fixed bracket 22, and a cam edge 901 is provided on the separation wheel 9 to abut against the trigger end of the travel switch 19. Two recesses 902 are provided on the cam edge 901. When one of the recesses 902 abuts against the trigger end of the travel switch 19, the outer tooth block 701 is engaged or disengaged from the inner tooth block 401. The travel switch 19 is installed for the control unit to determine the state of the clutch mechanism.

Claims

1. A shredder inlet structure, comprising a frame (1), a control unit and a driving mechanism are arranged on the frame (1), a paper picking mechanism is arranged on one side of the shredder inlet, the paper picking mechanism comprises a paper picking shaft (2), one end of the paper picking shaft (2) is axially fixed and circumferentially rotatably connected to a transmission gear (4), characterized in that: The transmission gear (4) is connected to the paper pickup shaft (2) via a clutch mechanism, one end of the driving mechanism is connected to the transmission gear (4), a paper stock detection mechanism is provided on the paper pickup mechanism, and both the paper stock detection mechanism and the clutch mechanism are connected to a control unit.

2. A paper shredder inlet structure as claimed in claim 1, characterized in that: The clutch mechanism comprises a fixed bracket (22), a pull rod (5), a static shaft sleeve (6), and a dynamic shaft sleeve (7); a motor (8) is mounted on the fixed bracket (22); an output end of the motor (8) is connected to a separation wheel (9); one end of the pull rod (5) is rotationally connected to the separation wheel (9), and the rotational connection is eccentrically arranged with respect to the separation wheel (9); the static shaft sleeve (6) is fixedly connected to the paper pickup shaft (2); the dynamic shaft sleeve (7) is circumferentially fixedly connected to the paper pickup shaft (2) in an axially sliding manner; the dynamic shaft sleeve (7) is arranged between the static shaft sleeve (6) and the transmission gear (4); an inner tooth block (401) is arranged in the inner hole of the transmission gear (4); one end of the dynamic shaft sleeve (7) is provided with a tooth block (401) which is engaged with the paper pickup shaft (2); An outer tooth block (701) meshed with an inner tooth block (401), an elastic element is provided between the static shaft sleeve (6) and the dynamic shaft sleeve (7), the elastic element is used to squeeze the shaft sleeve (7) to mesh the outer tooth block (701) with the inner tooth block (401), a separation protrusion (501) is provided at one end of the pull rod (5) away from the separation wheel (9), and this end of the pull rod (5) is axially fixed and radially slidably connected to the dynamic shaft sleeve (7), a separation ring (702) in contact with the separation protrusion (501) is provided on the dynamic shaft sleeve (7), and the separation protrusion (501) and the separation ring (702) are abutted against each other to push up the dynamic shaft sleeve (7) to disengage the outer tooth block (701) from the inner tooth block (401).

3. A paper shredder inlet structure as claimed in claim 1 or 2, characterized in that: The paper picking mechanism comprises a base (11), a support plate (16) is obliquely arranged on one side of the base (11) away from the inlet, a paper clamping mechanism is arranged on the support plate (16), a notch (1101) corresponding to the paper picking wheel (3) is opened on the base (11), an elastic mechanism is arranged in the notch (1101), the elastic mechanism comprises a box body (12), the opening of the box body (12) faces upward, a flap (13) is arranged in the box body (12), one end of the flap (13) is rotatably connected to the inner wall of the box body (12), the other end of the flap (13) is connected to the bottom surface of the box body (12) through a cylindrical spring (15), a friction block (14) is arranged at the top end of the flap (13), and the cylindrical spring (15) causes the friction block (14) to abut against the paper picking wheel (3).

4. A paper shredder inlet structure as claimed in claim 3, characterized in that: The paper clamping mechanism comprises a paper clamping board (17), a synchronous wheel (20) and two racks (21) meshed with the synchronous wheel (20); the paper clamping board (17) is symmetrically arranged on a support plate (16); the synchronous wheel (20) is rotatably mounted on the back of the support plate (16); the two racks (21) are slidably connected to the back of the support plate (16); a sliding groove corresponding to the paper clamping board (17) is provided on the support plate (16); the bottom end of the paper clamping board (17) passes through the sliding groove and is fixedly connected to one end of the corresponding rack (21).

5. A paper shredder inlet structure as claimed in claim 4, characterized in that: The paper stock detection mechanism comprises an infrared sensor, and the upper end surface of the support plate (16) is provided with a groove (18) for installing the infrared sensor.

6. A paper shredder inlet structure as claimed in claim 2, characterized in that: A travel switch (19) connected to the control unit is mounted on the fixed bracket (22); a cam edge (901) abutting against a trigger end of the travel switch (19) is provided on the separation wheel (9); two recesses (902) are provided on the cam edge (901); when one of the recesses (902) abuts against the trigger end of the travel switch (19), the outer tooth block (701) engages with or disengages from the inner tooth block (401).

7. A paper shredder inlet structure as claimed in claim 2, characterized in that: The paper-rubbing shaft (2) has a non-circular cross-section, the inner hole of the movable shaft sleeve (7) is adapted to the cross-sectional shape of the paper-rubbing shaft (2), the pull rod (5) has a separation protrusion (501) and one end thereof is provided with a straight slot (502), the pull rod (5) is sleeved on the movable shaft sleeve (7) through the straight slot (502), the elastic element is a coupling spring (10), the coupling spring (10) is sleeved on the paper-rubbing shaft (2), one end of the coupling spring (10) is in contact with the stationary shaft sleeve (6), and the other end is in contact with the movable shaft sleeve (7).

8. The paper shredder inlet structure according to claim 1, characterized in that: The driving mechanism is a servo motor (8).

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