A composite cutter assembly for a paper shredder

Abstract

The present application relates to the technical field of shredder equipment, and discloses a composite tool assembly for use in a shredder, including a first knife group and a second knife group, wherein the first knife group and the second knife group are formed by stacking a plurality of cutting blades, and a group of linkage grooves are respectively provided on the end faces of the two adjacent cutting blades groups, an annular groove is provided on the outer surface of the transmission shaft and at the relative position of the linkage grooves of the two adjacent cutting blades groups, and a bearing is provided at the end of the transmission shaft to form a movable sleeve between the bearing and the bracket. The present application provides a composite tool assembly for use in a shredder, wherein the cutting blades on the first knife group and the second knife group are arranged, and when it is necessary to clean the paper scraps stuck in the gaps between the plurality of cutting blades groups, the gaps between the stacked cutting blades on the first knife group and the second knife group can be forced to increase by moving the transmission shaft, and then the paper scraps stuck between the blades can be cleaned without disassembling.

Description

Technical Field

[0001] The present application relates to the technical field of paper shredder equipment, and in particular to a composite cutter assembly used in a paper shredder. Background Art

[0002] A shredder is an office device that feeds paper between rotating blades and then cuts it into many small pieces, thereby keeping the contents of the documents recorded on the paper confidential. Therefore, in order to ensure the fineness and thoroughness of paper cutting, the gap between the rotating blades is set very small. However, if the gap between the blades is too small, the blades will jam during the cutting process. Therefore, the existing shredders need to regularly remove the paper scraps between the blades during use, and the shredder needs to be disassembled, which makes the cleaning of the shredder more cumbersome.

[0003] At the same time, the blades of the shredder are relatively sharp, and the shredded paper is mostly stuck in the gaps between the blades, which makes it difficult to clean the shredded paper in the shredder and easily causes scratches to the cleaning personnel, resulting in poor safety and reliability.

[0004] Therefore, there is an urgent need for a composite cutter assembly for a paper shredder, which can automatically clean up the paper scraps stuck between the blades, so as to solve the defects of the existing paper shredder in actual use. Summary of the invention

[0005] The present application proposes a composite cutter assembly for a shredder, which can be used to clean up the paper scraps stuck between the blades without disassembling, and the cleaning personnel do not need to come into direct contact with the blades, effectively avoiding the phenomenon of scratches caused in the process of cleaning the paper scraps, and has the advantages of high safety and reliability. It is used to solve the problem that in order to ensure the fineness and thoroughness of paper cutting during the use of the existing shredder, the gap between the rotating blades is set very small, which is very easy to cause paper jams. Therefore, it is necessary to regularly clean the paper scraps between the blades, and the shredder needs to be disassembled, which makes the cleaning operation of the shredder more cumbersome; at the same time, the blades of the shredder are relatively sharp, and the paper scraps are mostly stuck in the gaps between the blades, which makes it difficult to clean up the paper scraps in the shredder and is very easy to cause scratches to the cleaning personnel.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a composite tool assembly for a paper shredder, comprising a first knife group and a second knife group, wherein a group of transmission shafts are fixedly sleeved inside the first knife group and the second knife group, and a bracket is provided at the end of the transmission shaft to fix the first knife group and the second knife group inside the paper cutter, a gear group is provided between the right ends of the two groups of transmission shafts to form a transmission connection, and a driving motor is provided inside the left bracket and fixedly connected to the transmission shaft on the first knife group, the first knife group and the second knife group are composed of a plurality of groups of cutting blades stacked together, and the cutting blades on the first knife group and the cutting blades on the second knife group are arranged alternately in sequence, and a group of linkage grooves are respectively provided on the end faces of the adjacent two groups of cutting blades, an annular groove is provided on the outer surface of the transmission shaft and at the relative position of the linkage grooves of the adjacent two groups of cutting blades, a bearing is provided on the end of the transmission shaft to form a movable sleeve connection with the bracket, and a spring is provided inside the bearing to form an elastic connection with the adjacent cutting blades.

[0007] Furthermore, a thrust bearing is provided on the contact end surface between the spring and the adjacent cutting blade, so that during the rotation of the cutting blade, the torque will not be transmitted to the spring, causing unnecessary power loss.

[0008] Furthermore, a conical groove is provided at the end of the transmission shaft, and a limiting bolt whose bottom end is configured to cooperate with the conical groove is threadedly connected at the corresponding position of the bearing, and in the initial state, the bottom end of the limiting bolt contacts the inner wall of the conical groove.

[0009] Furthermore, the end of the transmission shaft is directly connected to the internal transmission of the bracket through bolts, and during the rotation of the transmission shaft, the bearing is driven to rotate under the action of the bolts, and then the transmission shaft is forced to move to one side by rotating the bolts to squeeze the ball on it, or to restore the ball on it to its initial position. At the same time, another set of thrust bearings is provided on the contact end surface between the spring and the bearing, and the torque will not be transmitted to the spring during the rotation of the cutting blade, causing unnecessary power loss.

[0010] Furthermore, grooves are provided on the outer surfaces of the stacked cutting blades on the first knife group and the second knife group, and the groups of cutting blades are arranged in a certain order, so that the grooves on the groups of cutting blades are arranged in a spiral track.

[0011] Furthermore, the springs at both ends of the transmission shaft are always in a compressed state, and under normal circumstances, the pressure generated on the several groups of cutting blades of the first knife group and the second knife group is greater than the maximum working pressure of the shredder, and the sustainable compression displacement of the spring is greater than the sum of the relative displacements of the several groups of cutting blades stacked on the first knife group or the second knife group.

[0012] Furthermore, a straight hole connected to the inner cavity of the bearing is provided inside, thereby effectively balancing the gas pressure between the two sides of the transmission shaft during the movement of the transmission shaft.

[0013] The present invention application has the following technical effects:

[0014] The present application provides a composite tool assembly for a paper shredder. With respect to the cutting blades on the first knife group and the second knife group and the arrangement of the linkage structure annular grooves, spheres and linkage grooves therebetween, when it is necessary to clean the paper scraps stuck in the gaps between the plurality of cutting blades, the gaps between the plurality of cutting blades stacked on the first knife group and the second knife group can be forced to increase by moving the transmission shaft, and in the process of starting the driving motor again to drive the first knife group and the second knife group to rotate synchronously towards each other, the paper scraps stuck in the gaps are automatically discharged, and then the paper scraps stuck between the blades can be cleaned without disassembly, and the cleaning personnel do not need to come into direct contact with the blades, which effectively avoids scratches in the process of cleaning the paper scraps, and has high safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute a part of the specification, illustrate the embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0016] The present application can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

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

[0018] Figure 2 It is a top view schematic diagram of the structure of the present invention;

[0019] Figure 3 The structure of the present invention Figure 1 A magnified schematic diagram of point A;

[0020] Figure 4 The structure of the present invention Figure 1 An enlarged schematic diagram of point B;

[0021] Figure 5 It is a front view of the structure of the present invention;

[0022] Figure 6 It is a schematic diagram of the operation of the structure of the present invention.

[0023] In the figure: 1. first knife group; 2. second knife group; 3. transmission shaft; 4. bracket; 5. gear group; 6. driving motor; 7. cutting blade; 8. annular groove; 9. sphere; 10. bearing; 11. spring; 12. conical groove; 13. limit bolt. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] like Figure 1 , Figure 2 As shown, a composite cutter assembly for a paper shredder includes a first cutter group 1 and a second cutter group 2 for cutting paper in a rotating state. A set of transmission shafts 3 are fixedly sleeved inside the first cutter group 1 and the second cutter group 2, and a bracket 4 is provided at the end of the transmission shaft 3 to fix the first cutter group 1 and the second cutter group 2 inside the paper cutter. A gear group 5 is provided between the right ends of the two sets of transmission shafts 3 to form a transmission connection, and a driving motor 6 is provided inside the left bracket 4 to be fixedly connected to the transmission shaft 3 on the first cutter group 1. Under the transmission action of the gear group 5, when the driving motor 6 is started, the first cutter group 1 and the second cutter group 2 can be driven to perform synchronous rotation in opposite directions, thereby cutting the fed paper into many small pieces, such as Figure 3 As shown, the first knife group 1 and the second knife group 2 are composed of a plurality of stacked cutting blades 7, and the cutting blades 7 on the first knife group 1 and the cutting blades 7 on the second knife group 2 are arranged alternately in sequence, so that when a certain group of cutting blades 7 on the first knife group 1 or the second knife group 2 is damaged, it can be replaced separately without replacing the entire first knife group 1 or the second knife group 2, thereby effectively reducing the use and maintenance cost of the paper shredder, and a group of linkage grooves arranged in a ring array are respectively provided on the end faces of the two adjacent groups of cutting blades 7, and an annular groove 8 is provided on the outer surface of the transmission shaft 3 and at the relative position of the linkage grooves of the two adjacent groups of cutting blades 7, and a ball 9 is provided between the linkage groove and the annular groove 8, and then under the action of the linkage groove, the annular groove 8 and the ball 9, when the transmission shaft 3 rotates, the torque can be transmitted to the cutting blades 7 stacked on the outer surface of the transmission shaft 3, thereby driving the cutting blades 7 to rotate accordingly, as shown in FIG. Figure 4 , Figure 5 As shown, a bearing 10 is provided at the end of the transmission shaft 3 to form a movable sleeve connection with the bracket 4, and a spring 11 is provided inside the bearing 10 to form an elastic connection with the adjacent cutting blades 7, so that the plurality of groups of cutting blades 7 stacked on the transmission shaft 3 can fit closely together, and the transmission shaft 3 rotates synchronously therewith, as shown in FIG. Figure 6As shown, when it is necessary to clean the shredded paper stuck between the gap between the first knife group 1 and the second knife group 2, the transmission shaft 3 can be forced to move to one side, so that the ball 9 moves outward along the radial direction of the transmission shaft 3, and under the action of the linkage groove on the cutting blade 7, the two adjacent groups of cutting blades 7 are driven to move to the left and right sides respectively to compress the springs 11 on the corresponding sides, so that the gap between the cutting blades 7 stacked on the outer surfaces of the first knife group 1 and the second knife group 2 is increased, and in the process of starting the driving motor 6 again to drive the first knife group 1 and the second knife group 2 to rotate synchronously towards each other, the shredded paper stuck between the gaps is automatically discharged, and the shredded paper stuck between the blades can be cleaned without disassembly, and the cleaning personnel do not need to directly contact the blades, which effectively avoids scratches in the process of cleaning the shredded paper, and after the cleaning of the shredder is completed, the two groups of springs 11 are reversely twisted according to the loosening order and degree of the above-mentioned limit bolts 13 to re-assemble the first knife group 1 and the plurality of groups of cutting blades 7 stacked on the transmission shaft 3.

[0026] In the present technical solution, a thrust bearing is provided on the contact end surface between the spring 11 and the adjacent cutting blade 7, so that during the rotation of the cutting blade 7, the torque will not be transmitted to the spring 11, causing unnecessary power loss.

[0027] like Figure 4 As shown, in the present technical solution, a conical groove 12 is provided at the end of the transmission shaft 3, and a limiting bolt 13 whose bottom end is configured to match the conical groove 12 is threadedly connected at a corresponding position of the bearing 10, and in the initial state, the bottom end of the limiting bolt 13 is in contact with the inner wall of the conical groove 12, as shown in FIG. Figure 6 As shown, when the transmission shaft 3 needs to be moved, the limiting bolt 13 on one side is first screwed in the reverse direction to force it to separate from the conical groove 12, and then the limiting bolt 13 on the other side is screwed in the forward direction to squeeze the other end of the transmission shaft 3, thereby forcing the transmission shaft 3 to move to one side, thereby increasing the gap between the first knife group 1 and the plurality of groups of cutting blades 7 stacked on the transmission shaft 3.

[0028] In the present technical solution, the end of the transmission shaft 3 is directly connected to the internal transmission of the bracket 4 through bolts, and during the rotation of the transmission shaft 3, the bearing 10 is driven to rotate together with it under the action of the bolts, and then the transmission shaft 3 can be forced to move to one side by rotating the bolts to squeeze the ball 9 thereon, or to restore the ball 9 thereon to its initial position. At the same time, another set of thrust bearings is provided on the contact end surface between the spring 11 and the bearing 10, and during the rotation of the cutting blade 7, the torque will not be transmitted to the spring 11, causing unnecessary power loss.

[0029] like Figure 1 , Figure 2As shown, in the present technical solution, grooves are provided on the outer surfaces of the stacked cutting blades 7 on the first knife group 1 and the second knife group 2, and the plurality of cutting blades 7 are arranged in a certain order, so that the grooves on the plurality of cutting blades 7 are arranged in a spiral trajectory, thereby effectively increasing the downward pressure exerted on the object during the synchronous rotation of the first knife group 1 and the transmission shaft 3 in opposite directions, and when crushing some harder office items, such as hard disks, optical disks and integrated circuit boards, the problem of them being unable to be crushed due to the jumping phenomenon will not occur.

[0030] like Figure 5 As shown, in the present technical scheme, the springs 11 at both ends of the transmission shaft 3 are always in a compressed state, and under normal circumstances, the pressure generated on the several groups of cutting blades 7 of the first knife group 1 and the second knife group 2 is greater than the maximum working pressure of the shredder, thereby effectively ensuring the pressure of the cutting blades 7 at both ends of the first knife group 1 and the second knife group 2 toward the inside when the shredder is working, and preventing the cutting blades 7 at both ends from moving outwards due to the excessive hardness of the office objects during the operation, thereby causing incomplete crushing, and the sustainable compression displacement of the spring 11 is greater than the sum of the relative displacements of the several groups of cutting blades 7 stacked on the first knife group 1 or the second knife group 2, thereby ensuring that in the process of squeezing the transmission shaft 3, the gaps between the several groups of cutting blades 7 stacked on the outer surfaces of the first knife group 1 and the second knife group 2 can be effectively enlarged, thereby cleaning out the paper scraps stuck therein.

[0031] like Figure 4 As shown, in the present technical solution, a straight hole connected to the inner cavity of the bearing 10 is opened inside, thereby effectively balancing the gas pressure between the two sides of the transmission shaft 3 during the movement of the transmission shaft 3, so that the transmission shaft 3 can produce sufficient displacement to increase the gap between the several groups of cutting blades 7 stacked on the first knife group 1 and the second knife group 2.

Claims

1. A composite cutter assembly for a paper shredder, comprising a first cutter group (1) and a second cutter group (2), wherein a group of transmission shafts (3) are fixedly sleeved inside the first cutter group (1) and the second cutter group (2), and a bracket (4) is provided at the end of the transmission shaft (3) to fix the first cutter group (1) and the second cutter group (2) inside the paper cutter, a gear group (5) is provided between the right ends of the two groups of transmission shafts (3) to form a transmission connection, and a driving motor (6) is provided inside the left bracket (4) and fixedly connected to the transmission shaft (3) on the first cutter group (1), characterized in that: The first knife group (1) and the second knife group (2) are formed by stacking cutting blades (7), and the cutting blades (7) on the first knife group (1) and the cutting blades (7) on the second knife group (2) are arranged alternately in sequence, and a group of linkage grooves are respectively provided on the end surfaces of the two adjacent groups of cutting blades (7), and an annular groove (8) is provided on the outer surface of the transmission shaft (3) and at a position relative to the linkage grooves of the two adjacent groups of cutting blades (7), and a bearing (10) is provided at the end of the transmission shaft (3) to form a movable sleeve connection with the bracket (4), and a spring (11) is provided inside the bearing (10) to form an elastic connection with the adjacent cutting blades (7); A thrust bearing is provided on the contact end surface between the spring (11) and the adjacent cutting blade (7), so that during the rotation of the cutting blade (7), torque is not transmitted to the spring (11), causing unnecessary power loss; The end of the transmission shaft (3) is provided with a tapered groove (12), and a limit bolt (13) having a bottom end configured to match the tapered groove (12) is threadedly connected at a corresponding position of the bearing (10), and in an initial state, the bottom end of the limit bolt (13) and the inner wall of the tapered groove (12) are in contact with each other; A ball (9) is provided between the linkage groove and the annular groove (8), and under the action of the linkage groove, the annular groove (8) and the ball (9), when the transmission shaft (3) rotates, the torque is transmitted to the cutting blade (7) stacked on the outer surface of the transmission shaft (3), thereby driving the cutting blade (7) to rotate accordingly. The end of the transmission shaft (3) is directly connected to the internal transmission of the bracket (4) through a bolt, and during the rotation of the transmission shaft (3), the bearing (10) is driven to rotate therewith under the action of the bolt, and the transmission shaft (3) is forced to move to one side by rotating the bolt, so as to squeeze the ball (9) thereon, or to restore the ball (9) thereon to an initial position. At the same time, another set of thrust bearings is provided on the contact end surface between the spring (11) and the bearing (10), and during the rotation of the cutting blade (7), the torque is not transmitted to the spring (11), thereby causing unnecessary power loss. Grooves are provided on the outer surfaces of the stacked cutting blades (7) on the first blade assembly (1) and the second blade assembly (2), and the cutting blades (7) are arranged in a certain sequence so that the grooves on the cutting blades (7) are arranged in a spiral track; The springs (11) at both ends of the transmission shaft (3) are always in a compressed state, and under normal circumstances, the pressure exerted on the cutting blades (7) on the first knife group (1) and the second knife group (2) is greater than the maximum working pressure of the paper shredder, and the continuous compression displacement of the spring (11) is greater than the sum of the relative displacements of the stacked cutting blades (7) on the first knife group (1) or the second knife group (2); The interior of the bearing (10) is provided with a straight hole connected to the inner cavity thereof, thereby effectively balancing the gas pressure between the two sides of the transmission shaft (3) during the movement of the transmission shaft (3).

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