Office paper cutting processing guide structure

Abstract

The utility model discloses an office paper cutting processing is with guide structure, including mounting support, elevating support, guide roller subassembly and differential drive assembly. Elevating support can along mounting support vertical elevating, and two guide roller subassembly are installed on mounting support and elevating support respectively, and the arrangement is horizontal up and down. Guide roller subassembly is by coaxial connection's guide roller A, guide roller B and detachable counterweight piece are composed, and guide roller B is through extension axle and guide roller A rotatory connection. Two guide roller subassembly reverse arrangement makes guide roller A on elevating support, guide roller B respectively with guide roller B on mounting support, guide roller A keep equal speed reverse movement, ensure paper steady transmission. Differential drive assembly is connected with guide roller A, guide roller B on mounting support, and can adjust two guide roller speed difference, realizes automatic deviation correction. The structure can adapt to different thickness paper, has transmission stable, positioning accurate, automation degree higher advantage, significantly promotes cutting processing quality and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of paper cutting equipment technology, specifically a guide structure for cutting and processing office paper. Background Technology

[0002] In the cutting and processing of office paper, stable paper transport and precise positioning are key factors in ensuring cutting quality. Traditional guiding structures typically use fixed guide roller sets to clamp and transport the paper. However, due to uneven paper thickness or fluctuations in transport speed, this can easily lead to paper misalignment, wrinkling, or even jamming, affecting processing efficiency and finished product quality. Furthermore, existing guide roller systems often employ simple mechanical lifting structures to adjust the paper clamping spacing, lacking dynamic compensation capabilities and making it difficult to adapt to the stable transport requirements of paper of varying thicknesses.

[0003] In existing technologies, some guiding mechanisms use a dual-roller synchronous drive to transport paper. However, because the guide roller speed is fixed, when the paper deviates during transport, the speed difference between the two sides cannot be adjusted in real time, resulting in insufficient correction capability. In addition, the lifting and adjusting mechanism of traditional guide rollers usually adopts a single-side drive or manual adjustment method, which is not only cumbersome to operate, but also prone to a decrease in positioning accuracy due to vibration or inertia during high-speed operation, affecting the smooth transport of paper. Summary of the Invention

[0004] In view of the above-mentioned shortcomings in the existing technology, the purpose of this utility model is to provide a guide structure for office paper cutting and processing, which can realize stable paper feeding and precise deviation correction, and can also adapt to the processing needs of paper of different thicknesses. It has a high degree of automation and operational reliability, and can significantly improve the quality and efficiency of office paper cutting and processing.

[0005] The technical solution adopted by this utility model to achieve the above objectives is: a guide structure for cutting and processing office paper, including a mounting bracket, a lifting bracket, a guide roller assembly, and a differential drive assembly that is poweredly connected to the guide roller assembly. The lifting bracket is slidably mounted on the mounting bracket and moves up and down in the vertical direction. A set of guide roller assemblies is rotatably mounted on both the mounting bracket and the lifting bracket. The two sets of guide roller assemblies are arranged along the height direction, and the axes of the guide roller assemblies are arranged along the horizontal direction.

[0006] The guide roller assembly includes guide roller A, guide roller B, and a counterweight that are coaxially rotatably connected. One end of guide roller A is fixed to an extension shaft, and guide roller B is rotatably mounted on the extension shaft. The counterweight is detachably mounted on the outer end of the extension shaft. The two sets of guide roller assemblies are arranged in opposite directions. Guide roller A and guide roller B mounted on the lifting bracket move in the same direction at the same speed as guide roller B and guide roller A mounted on the mounting bracket. Guide roller A and guide roller B mounted on the mounting bracket are both poweredly connected to the differential drive assembly.

[0007] Based on the above technical solutions, in order to ensure that the lifting support is stably assembled on the mounting bracket and stably raised and lowered in the vertical direction, the following technical solutions are provided.

[0008] A vertically arranged guide column is fixedly connected to the mounting bracket, and an assembly plate is fixedly connected to the top of the guide column. The lifting bracket is slidably inserted into the guide column, and a vertically arranged telescopic cylinder is fixedly installed on the assembly plate. The movable end of the telescopic cylinder is fixedly connected to the lifting bracket.

[0009] Based on the above technical solutions, in order to ensure that the guide roller assembly can be stably installed on the mounting bracket and the lifting bracket in a relatively rotating posture, and to realize the linkage combination of the guide rollers on the same side of the two sets of guide roller assemblies, the following technical solutions are provided.

[0010] The outer ends of guide rollers A and B are rotatably mounted on the mounting bracket or lifting bracket. The outer ends of guide rollers A and B are coaxially fixed with transmission bevel gears. Each set of transmission bevel gears is meshed with a drive bevel gear. The drive bevel gears of the two sets of guide roller assemblies are arranged coaxially and symmetrically. Spline shafts and spline grooves are respectively provided at the shaft centers of the two sets of drive bevel gears arranged coaxially. The spline shafts and spline grooves are arranged vertically and are slidably inserted.

[0011] Based on the above technical solutions, in order to ensure that the counterweight can be stably assembled on the extension shaft so that the overall center of gravity of the guide roller A is biased towards the length center, thereby ensuring its operational stability, the following technical solutions are provided.

[0012] The extension shaft is equipped with a fixed chuck and a movable chuck arranged coaxially. The fixed chuck is fixed to the extension shaft, and the movable chuck is sleeved around the extension shaft. The counterweight is inserted into the extension shaft and arranged between the fixed chuck and the movable chuck. The fixed chuck, the movable chuck, and the counterweight are fixedly combined by bolt assemblies.

[0013] Based on the above technical solutions, in order to ensure that the differential drive assembly can achieve power connection with the guide roller assembly below, and can drive guide roller A and guide roller B to operate synchronously or differentially, the following technical solutions are provided.

[0014] The differential drive assembly includes a housing, an input sun gear, an input planetary gear, an output sun gear, an output planetary gear, an adjusting motor A, and an adjusting motor B. The housing comprises two sets symmetrically arranged and rotatably mounted on the mounting bracket. Each housing set contains an input sun gear and an output sun gear, coaxially arranged. The input and output planetary gears are rotatably mounted within the housing and mesh with the input and output sun gears, respectively. The input and output planetary gears are meshed together. The adjusting motor A is powered by the two sets of input sun gears, and the adjusting motor B is powered by the two housing sets. The two sets of output sun gears are powered by the guide rollers A and B of the guide roller assembly, respectively.

[0015] Based on the above technical solutions, in order to ensure that the regulating motor A and regulating motor B can be powered to the input sun gear and housing respectively, and to ensure that the two sets of output planetary gears can be powered to the guide rollers A and B, the following technical solutions are provided.

[0016] Two sets of input sun gears are coaxially fixedly connected via a connecting shaft. A bevel gear A is fixedly connected to the output shaft of the regulating motor A, and a bevel gear a, which meshes with bevel gear A, is fixedly connected to the connecting shaft. A bevel gear B is fixedly connected to the output shaft of the regulating motor B, and two sets of symmetrically arranged bevel gears b are meshed with the bevel gear B. Both sets of bevel gears b are coaxially fixedly connected to spur gear A. A spur gear a, which meshes with spur gear A, is fixedly connected to the housing component. Both sets of output sun gears are fixedly connected to spur gear B. A guide roller B and an extension shaft mounted on the mounting frame are both fixedly connected to spur gear b. The two sets of spur gear b are respectively meshed with the two sets of spur gear B.

[0017] The beneficial effects of this utility model are:

[0018] 1. Dynamic spacing adjustment to adapt to different paper thicknesses: Through the cooperation of the lifting bracket and the telescopic cylinder, the vertical lifting and lowering adjustment of the guide roller assembly can be realized. The clamping spacing between the upper and lower guide rollers can be flexibly adjusted to ensure stable clamping and conveying of office paper of different thicknesses and improve the applicability of the equipment.

[0019] 2. Differential drive ensures precise deviation correction and improves transmission stability. The differential drive component dynamically adjusts the speed difference between guide roller A and guide roller B through the coordinated control of motor A and motor B. When the paper deviates, the differential drive automatically corrects the conveying direction, effectively preventing paper deviation and wrinkling, and ensuring accurate positioning before cutting.

[0020] 3. The reverse symmetrical transmission layout ensures stable power transmission. It adopts the sliding fit of spline shaft and spline groove, combined with the symmetrical bevel gear transmission structure, so that the corresponding guide rollers of the upper and lower guide roller assemblies always maintain the same speed and reverse operation, ensuring that the paper can be transported smoothly during the lifting and adjustment process, and avoiding speed fluctuations from affecting the processing quality.

[0021] 4. Modular counterweight design optimizes operational stability. The counterweight blocks can be detached and installed via fixed and movable chucks, making it easy to adjust the counterweight according to actual needs. This brings the center of gravity of the guide roller assembly closer to the center position, reducing vibration during high-speed operation and improving the stability and service life of the equipment.

[0022] 5. The structure is compact and the linkage is highly efficient. The differential drive component adopts a transmission method that combines planetary gear train and bevel gear. It can realize synchronous or differential operation of guide roller A and guide roller B in a limited space. The structure is compact and the transmission efficiency is high, making it suitable for high-speed continuous paper cutting and processing scenarios.

[0023] 6. High degree of automation, reducing manual intervention. The guide roller spacing adjustment and differential speed control are realized through motor drive, reducing manual adjustment links, improving production efficiency, and reducing paper feeding problems caused by human operation errors. It is suitable for modern intelligent office paper processing equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 A schematic diagram of the structure of two sets of guide roller assemblies combined with a differential drive assembly;

[0026] Figure 3 This is a schematic diagram of the linkage combination of identical side guide rollers in two sets of guide roller assemblies;

[0027] Figure 4 This is a structural diagram of guide rollers A and B in their disassembled state.

[0028] Figure 5 A schematic diagram of the structure of the guide roller assembly and the differential drive assembly;

[0029] Figure 6 This is a schematic diagram of the differential drive assembly.

[0030] Figure 7 This is a structural diagram of the differential drive component in its disassembled state.

[0031] In the diagram: 1 Mounting bracket, 11 Guide column, 12 Assembly plate, 13 Telescopic cylinder, 2 Lifting bracket, 3 Guide roller assembly, 31 Guide roller A, 311 Extension shaft, 312 Fixed chuck, 313 Movable chuck, 32 Guide roller B, 33 Counterweight, 341 Transmission bevel gear, 342 Drive bevel gear, 343 Splined shaft, 35 Spur gear b, 4 Differential drive assembly, 41 Housing component, 411 Spur gear a, 42 Input sun gear, 421 Connecting shaft, 422 Bevel gear a, 43 Input planet gear, 44 Output sun gear, 441 Spur gear B, 45 Output planet gear, 46 Adjusting motor A, 461 Bevel gear A, 47 Adjusting motor B, 471 Bevel gear B, 472 Bevel gear b, 473 Spur gear A. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figure 1-7 A guide structure for cutting and processing office paper includes a mounting bracket 1, a lifting bracket 2, a guide roller assembly 3, and a differential drive assembly 4 that is poweredly connected to the guide roller assembly 3. The lifting bracket 2 is slidably mounted on the mounting bracket 1 and moves up and down in the vertical direction. A set of guide roller assemblies 3 are rotatably mounted on both the mounting bracket 1 and the lifting bracket 2. The two sets of guide roller assemblies 3 are arranged along the height direction, and the axes of the guide roller assemblies 3 are arranged along the horizontal direction.

[0034] The guide roller assembly 3 includes a guide roller A31, a guide roller B32, and a counterweight 33 that are coaxially rotatably connected. One end of the guide roller A31 is fixedly connected to an extension shaft 311. The guide roller B32 is rotatably mounted on the extension shaft 311. The outer end of the extension shaft 311 is detachably equipped with the counterweight 33. The two sets of guide roller assemblies 3 are arranged in opposite directions. The guide rollers A31 and B32 mounted on the lifting bracket 2 move in the same direction at the same speed as the guide rollers B32 and A31 mounted on the mounting bracket 1. The guide rollers A31 and B32 mounted on the mounting bracket 1 are both connected to the differential drive assembly 4.

[0035] The guide roller assembly 3 mounted on the lifting bracket 2 can move up and down with the lifting bracket 2 as a whole, thereby adjusting the distance between the two sets of guide roller assemblies 3 so that the office paper passing through and being transported between the two sets of guide roller assemblies 3 can be clamped and positioned.

[0036] Arranging the two sets of guide roller assemblies 3 in opposite directions, with guide rollers A31 and B32 of the upper guide roller assembly 3 vertically opposite to guide rollers B32 and A31 of the lower guide roller assembly 3 respectively, allows the counterweights 33 mounted on them to be arranged at opposite ends, so that the overall center of gravity of the guide structure is kept in the central position. At the same time, it can also prevent spatial movement interference between the counterweights 33 mounted on the upper guide roller assembly 3 and the counterweights 33 of the lower guide roller assembly 3 when the lifting bracket 2 drives the upper guide roller assembly 3 to move up and down, thus ensuring its operational stability.

[0037] When the lifting bracket 2 drives the upper guide roller assembly 3 to move up and down, its guide rollers A31 and B32 maintain the same speed and reverse rotation with the guide rollers B32 and A31 of the lower guide roller assembly 3, so as to achieve stable paper transfer between the two sets of guide roller assemblies 3.

[0038] When the differential drive assembly 4 drives the guide roller assembly 3 below, it can differentially adjust the rotation speed of guide roller A31 and guide roller B32. When the office paper being conveyed shifts to one side, the speed difference between guide roller A31 and guide roller B32 can be adjusted. By using the differential speed of the drive on both sides of the office paper, the office paper can be made to move back to a stable transmission, so as to ensure the stable operation of the subsequent cutting process.

[0039] To ensure that the lifting bracket 2 is stably assembled on the mounting bracket 1 and can be stably lifted and lowered in the vertical direction, the following technical solution is provided.

[0040] A vertically arranged guide column 11 is fixedly connected to the mounting bracket 1. An assembly plate 12 is fixedly connected to the top of the guide column 11. The lifting bracket 2 is slidably inserted into the guide column 11. A vertically arranged telescopic cylinder 13 is fixedly installed on the assembly plate 12. The movable end of the telescopic cylinder 13 is fixedly connected to the lifting bracket 2.

[0041] The guide column 11 ensures that the lifting bracket 2 slides stably in the vertical direction. The mounting plate 12 reinforces each set of guide columns 11 to ensure verticality and provides a mounting fulcrum for the telescopic cylinder 13. By controlling the telescopic posture of the telescopic cylinder 13, the lifting bracket 2 and the guide roller assembly 3 mounted on it can be controlled to lift and adjust stably.

[0042] To ensure that the guide roller assembly 3 can be stably installed on the mounting bracket 1 and the lifting bracket 2 in a relatively rotating posture, and to realize the linkage combination of the guide rollers on the same side of the two sets of guide roller assemblies 3, the following technical solution is provided.

[0043] The outer ends of guide rollers A31 and B32 are rotatably mounted on mounting bracket 1 or lifting bracket 2. The outer ends of guide rollers A31 and B32 are coaxially fixed with transmission bevel gears 341. Each set of transmission bevel gears 341 is meshed with drive bevel gears 342. The drive bevel gears 342 of the two sets of guide roller assemblies 3 are coaxially and symmetrically arranged. Spline shafts 343 and spline grooves are respectively provided at the shaft center of the two sets of drive bevel gears 342 that are coaxially arranged. The spline shafts 343 and spline grooves are arranged in the vertical direction and are slidably inserted.

[0044] Due to the cooperation between the spline shaft 343 and the spline groove, the two sets of drive bevel gears 342 arranged coaxially on the same side can always maintain the same speed. During the lifting and lowering adjustment of the upper guide roller assembly 3, the power can always be transmitted stably. Since the two sets of drive bevel gears 342 maintain a symmetrical layout, they drive the two sets of transmission bevel gears 341 to maintain the same speed and reverse rotation, thus realizing that the upper guide roller assembly 3 and the lower guide roller assembly 3 always maintain the opposite rotation.

[0045] The guide roller A31 of the upper guide roller assembly 3 and the guide roller B32 of the lower guide roller assembly 3 are linked by the drive bevel gear 342, transmission bevel gear 341, spline shaft 343 and spline groove, so that the two sets of guide rollers always maintain the same speed. The guide roller B32 of the upper guide roller assembly 3 and the guide roller A31 of the lower guide roller assembly 3 also maintain the same speed according to the same principle.

[0046] To ensure that the counterweight 33 can be stably assembled on the extension shaft 311, so that the overall center of gravity of the guide roller A31 is biased towards the length center, thereby ensuring its operational stability, the following technical solution is provided.

[0047] The extension shaft 311 is equipped with a fixed chuck 312 and a movable chuck 313 arranged coaxially. The fixed chuck 312 is fixed to the extension shaft 311, and the movable chuck 313 is sleeved around the extension shaft 311. The counterweight 33 is inserted into the extension shaft 311 and arranged between the fixed chuck 312 and the movable chuck 313. The fixed chuck 312, the movable chuck 313, and the counterweight 33 are fixedly combined by bolt assembly.

[0048] The counterweight 33 can be adjusted in number and weight according to the design differences of the two sets of guide roller assemblies 3 so that the centers of the two sets of guide roller assemblies 3 are close to the center. The counterweight 33 can be effectively fixed by the fixed chuck 312, the movable chuck 313 and the bolt assembly, so that the guide roller assembly 3 can operate stably.

[0049] To ensure that the differential drive assembly 4 can achieve power connection with the guide roller assembly 3 below, and can drive the guide roller A31 and guide roller B32 to operate synchronously or differentially, the following technical solution is provided.

[0050] The differential drive assembly 4 includes a housing 41, an input sun gear 42, an input planetary gear 43, an output sun gear 44, an output planetary gear 45, an adjusting motor A46, and an adjusting motor B47. The housing 41 includes two sets of symmetrically arranged gears rotatably mounted on the mounting bracket 1. The input sun gear 42 and the output sun gear 44, which are coaxially arranged, are rotatably mounted in both sets of housing 41. The input planetary gear 43 and the output planetary gear 45 are rotatably mounted in the housing 41 and are engaged with the input sun gear 42 and the output sun gear 44, respectively. The input planetary gear 43 and the output planetary gear 45 are engaged. The adjusting motor A46 is powered to the two sets of input sun gears 42, and the adjusting motor B47 is powered to the two sets of housing 41. The two sets of output sun gears 44 are powered to the guide rollers A31 and B32 of the guide roller assembly 3, respectively.

[0051] The housing 41 ensures the stable assembly and operation of the input sun gear 42, input planetary gears, output sun gear 44, and output planetary gear 45. When the regulating motor A46 operates alone, it can drive the two sets of input sun gears 42 to rotate synchronously and in the same direction. The power flows along the input sun gear 42, input planetary gear 43, output planetary gear 45, and output sun gear 44, so that the two sets of output sun gears 44 keep rotating synchronously and in the same direction, thereby driving the guide rollers A31 and B32 of the lower guide roller assembly 3 to keep rotating synchronously and in the same direction.

[0052] Based on the above operation, when the regulating motor B47 is in operation, it can drive the two sets of housing parts 41 to maintain the same speed in opposite directions. The housing parts 41 drive the input end planetary gears 43 and the output end planetary gears 45, which are arranged in a ring array, to rotate around the axis of the housing parts 41. This drives the two sets of output end sun gears 44 to achieve differential operation, thereby realizing the adjustment of the differential operation of guide rollers A31 and B32.

[0053] To ensure that the regulating motors A46 and B47 can be powered to the input sun gear 42 and housing 41 respectively, and to ensure that the two sets of output planetary gears 45 can be powered to the guide rollers A31 and B32, the following technical solutions are provided.

[0054] Two sets of input sun gears 42 are coaxially fixedly connected via connecting shaft 421. A bevel gear A461 is fixedly connected to the output shaft of the regulating motor A46, and a bevel gear a422 that meshes with the bevel gear A461 is fixedly connected to the connecting shaft 421. A bevel gear B471 is fixedly connected to the output shaft of the regulating motor B47, and two sets of symmetrically arranged bevel gears b472 are meshed with the bevel gears B471. Both sets of bevel gears b472 are coaxially fixedly connected to spur gears A473. A spur gear a411 that meshes with the spur gear A473 is fixedly connected to the housing 41. Both sets of output sun gears 44 are fixedly connected to spur gears B441. A spur gear b35 is fixedly connected to the guide roller B32 and the extension shaft 311 mounted on the mounting frame. The two sets of spur gears b35 are meshed with the two sets of spur gears B441 respectively.

[0055] The regulating motor A46 drives the connecting shaft 421 and the two sets of input sun gears 42 to rotate synchronously through bevel gears A461 and a422. The two sets of bevel gears b472 maintain a symmetrical layout. The regulating motor B47 drives the two sets of bevel gears b472 to always rotate in opposite directions at the same speed. Then, through the combination of spur gears A473 and a411, the two sets of housing parts 41 are driven to rotate in opposite directions at the same speed. Through the combination of spur gears B441 and b35, the power of the output sun gear 44 can be stably transmitted to the guide rollers A31 and B32.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A guide structure for cutting and processing office paper, characterized in that: It includes a mounting bracket (1), a lifting bracket (2), a guide roller assembly (3), and a differential drive assembly (4) that is poweredly connected to the guide roller assembly (3). The lifting bracket (2) is slidably mounted on the mounting bracket (1) and moves up and down in the vertical direction. A set of guide roller assemblies (3) is rotatably mounted on both the mounting bracket (1) and the lifting bracket (2). The two sets of guide roller assemblies (3) are arranged along the height direction, and the axes of the guide roller assemblies (3) are arranged along the horizontal direction. The guide roller assembly (3) includes a guide roller A (31), a guide roller B (32), and a counterweight (33) that are coaxially rotatably connected. One end of the guide roller A (31) is fixedly connected to an extension shaft (311). The guide roller B (32) is rotatably mounted on the extension shaft (311). The outer end of the extension shaft (311) is detachably equipped with the counterweight (33). The two sets of guide roller assemblies (3) are arranged in opposite directions. The guide roller A (31) and guide roller B (32) mounted on the lifting bracket (2) move in the opposite direction at the same speed as the guide roller B (32) and guide roller A (31) mounted on the mounting bracket (1). The guide roller A (31) and guide roller B (32) mounted on the mounting bracket (1) are both connected to the differential drive assembly (4).

2. The guide structure for cutting and processing office paper according to claim 1, characterized in that: A vertically arranged guide column (11) is fixedly connected to the mounting bracket (1), and an assembly plate (12) is fixedly connected to the top of the guide column (11). The lifting bracket (2) is slidably inserted into the guide column (11), and a vertically arranged telescopic cylinder (13) is fixedly installed on the assembly plate (12). The movable end of the telescopic cylinder (13) is fixedly connected to the lifting bracket (2).

3. The guide structure for cutting and processing office paper according to claim 1, characterized in that: The outer ends of the guide rollers A (31) and B (32) are rotatably mounted on the mounting bracket (1) or the lifting bracket (2). The outer ends of the guide rollers A (31) and B (32) are coaxially fixed with transmission bevel gears (341). Each set of transmission bevel gears (341) is meshed with a drive bevel gear (342). The drive bevel gears (342) of the two sets of guide roller assemblies (3) are coaxially and symmetrically arranged. Spline shafts (343) and spline grooves are respectively provided at the shaft center of the two sets of drive bevel gears (342) that are coaxially arranged. The spline shafts (343) and spline grooves are arranged in the vertical direction and are slidably connected.

4. The guide structure for cutting and processing office paper according to claim 1, characterized in that: The extension shaft (311) is equipped with a fixed chuck (312) and a movable chuck (313) arranged coaxially. The fixed chuck (312) is fixed to the extension shaft (311), and the movable chuck (313) is sleeved around the extension shaft (311). The counterweight (33) is inserted into the extension shaft (311) and arranged between the fixed chuck (312) and the movable chuck (313). The fixed chuck (312), the movable chuck (313), and the counterweight (33) are fixedly combined by bolt assembly.

5. The guide structure for cutting and processing office paper according to claim 1, characterized in that: The differential drive assembly (4) includes a housing (41), an input sun gear (42), an input planetary gear (43), an output sun gear (44), an output planetary gear (45), an adjusting motor A (46), and an adjusting motor B (47). The housing (41) includes two sets of symmetrically arranged components rotatably mounted on the mounting bracket (1). Each set of housings (41) contains an input sun gear (42) and an output sun gear (44) rotatably mounted and arranged coaxially. The input planetary gear (43) and the output sun gear (45) are rotatably mounted on the mounting bracket (1). The planetary gears (45) are all rotatably installed in the housing (41) and are engaged with the input sun gear (42) and the output sun gear (44) respectively. The input planetary gear (43) is engaged with the output planetary gear (45). The regulating motor A (46) is poweredly connected to the two sets of input sun gears (42). The regulating motor B (47) is poweredly connected to the two sets of housing (41). The two sets of output sun gears (44) are poweredly connected to the guide rollers A (31) and B (32) of the guide roller assembly (3) respectively.

6. The guide structure for cutting and processing office paper according to claim 5, characterized in that: Two sets of input sun gears (42) are coaxially fixedly connected via a connecting shaft (421). A bevel gear A (461) is fixedly connected to the output shaft of the regulating motor A (46), and a bevel gear a (422) is fixedly connected to the connecting shaft (421) to mesh with the bevel gear A (461). A bevel gear B (471) is fixedly connected to the output shaft of the regulating motor B (47), and two sets of symmetrically arranged bevel gears b (472) are meshed with the bevel gear B (471). Each set of bevel gears b (472) is coaxially fixed with a spur gear A (473). The housing part (41) is fixed with a spur gear a (411) that meshes with the spur gear A (473). Both sets of output sun gears (44) are fixed with spur gears B (441). The guide rollers B (32) and the extension shaft (311) assembled on the mounting frame are fixed with spur gears b (35). The two sets of spur gears b (35) are respectively meshed with the two sets of spur gears B (441).

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