A file shredder for indoor and outdoor decoration cost

Abstract

The utility model discloses a kind of indoor and outdoor decoration cost's file crushing device, it is related to engineering cost technical field, including pulverization box, pulverizer, pushing mechanism and pressing mechanism, pulverization box upper end is equipped with feed inlet, inside is equipped with pulverizer, lower part forms storage cavity;Pushing mechanism is by servo motor, reciprocating screw, transmission block and mounting plate constitute, for the paper scrap after crushing is collected and preliminary compression;Pressing mechanism includes stepper motor, cam and pressing plate, set in mounting plate, for the paper scrap group implements secondary pressurization, the utility model is through setting pushing mechanism and pressing mechanism, solved the paper scrap loose, accumulated volume big, storage efficiency low, need frequent cleaning problem when traditional file crushing equipment handles a lot of cost data, simultaneously, capacity sensor real-time monitoring paper scrap amount, realize the automation control of compression process.

Description

Technical Field

[0001] This utility model relates to the field of engineering cost technology, specifically to a document shredding device for interior and exterior decoration cost estimates. Background Technology

[0002] In the fields of office and engineering management, the destruction of paper documents is an important part of information security management. Traditional document shredders only complete the shredding operation, and the paper scraps are loose and fluffy, resulting in a large accumulation volume. This leads to frequent emptying of the storage container, low processing efficiency, and is not conducive to subsequent transportation and recycling.

[0003] Common paper shredders on the market are usually only equipped with basic shredding blades and a small scrap box. The shredded paper scraps fall directly into the box without any compression. When processing large amounts of documents, such as interior and exterior decoration cost lists and contracts, the scrap box fills up very easily, requiring multiple shutdowns for cleaning, which seriously affects work efficiency. At the same time, it generates a large amount of low-density waste paper, increasing storage and transportation costs. Utility Model Content

[0004] To address the problems mentioned in the background art, the purpose of this utility model is to provide a document shredding device for indoor and outdoor decoration cost estimates, which has the advantages of compression and collection, and solves the problem of loose waste paper taking up space.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a document shredding device for indoor and outdoor decoration cost estimates, wherein the shredding assembly includes a shredding box, a feed inlet, a shredder, and a discharge plate, the upper end of the shredding box is fixedly connected to the lower end of the feed inlet, the interior of the shredding box is fixedly connected to the surface of the shredder, and the lower end of the shredding box is rotatably connected to the discharge plate by a snap fastener; The lower end of the shredder is equipped with a pressing mechanism, and the pressing mechanism is equipped with a pushing mechanism. The pressing mechanism is used to press the shredded waste paper, and the pushing mechanism is used to collect the waste paper.

[0006] In a preferred embodiment of this utility model, the pressing mechanism includes a dustproof plate, a stepper motor, a transmission component, a connecting rod, a cam, and a pressing plate. The inner wall of the dustproof plate is fixedly connected to the surface of the stepper motor. The tooth surface at the output end of the stepper motor meshes with the inner tooth surface of the transmission component. The tooth surfaces on the inner walls of both ends of the transmission component mesh with the rear tooth surfaces of the two connecting rods, respectively. The surface of the connecting rod is fixedly connected to the inner wall of the cam, and the surface of the cam contacts the surface of the pressing plate.

[0007] In a preferred embodiment of this invention, the surface of the dustproof plate is slidably connected to the rear end of the crushing box, and the stepper motor and transmission components are disposed inside the dustproof plate.

[0008] In a preferred embodiment of this utility model, the driving mechanism includes a servo motor, a reciprocating screw, a transmission block, a guide rod, a stroke plate, a mounting plate, and a telescopic baffle. The output end of the servo motor is fixedly connected to the right end of the reciprocating screw, the surface of the reciprocating screw is threadedly connected to the inner wall of the transmission block, both ends of the guide rod are fixedly connected to the inner wall of the stroke plate, and the upper end of the mounting plate is fixedly connected to the left end of the telescopic baffle.

[0009] In a preferred embodiment of this invention, the surface of the servo motor is fixedly connected to the right end of the crushing box, both ends of the reciprocating screw are rotatably connected to the inner wall of the stroke plate, the surface of the transmission block is slidably connected to the rear inner wall of the crushing box via a sliding groove, the surface of the stroke plate is fixedly connected to the rear end of the crushing box, the surface of the mounting plate is slidably connected to the inner wall of the crushing box, and the left end of the telescopic baffle is fixedly connected to the inner wall of the crushing box.

[0010] In a preferred embodiment of this invention, the inner wall of the mounting plate is slidably connected to the surface of the pressing plate, both ends of the connecting rod are rotatably connected to the inner wall of the mounting plate, and the surface of the dustproof plate is fixedly connected to the rear end surface of the mounting plate.

[0011] In a preferred embodiment of this invention, the surface of the guide rod is slidably connected to the inner wall of the rear side of the dustproof plate, and the surface of the transmission block is fixedly connected to the rear end of the dustproof plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model solves the problems of loose paper scraps, large space occupation, and inconvenience in collection and disposal after traditional document shredding by setting up a shredding component, a pushing mechanism and a pressing mechanism in a coordinated structure, and achieves the effects of automatic shredding, collection and compression, storage and easy recycling of waste paper.

[0013] 2. This utility model solves the problem of paper scraps easily flowing back and unevenly distributed during the compression process by setting up a pushing mechanism, using a servo motor to drive a reciprocating screw to push the mounting plate forward, and cooperating with a telescopic baffle to close the pressing surface, thus achieving stable collection and initial compression of shredded paper scraps.

[0014] 3. This utility model solves the problems of low paper ball density and loose forming by setting up a pressing mechanism and using a stepper motor to drive a cam to periodically push the pressing plate, thereby applying secondary pressure to the initially compressed paper scraps and improving the compactness and overall forming effect of waste paper compression. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main three-dimensional structure provided in an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of the pressing mechanism provided in this embodiment of the utility model; Figure 3 This is a three-dimensional structural diagram of the pushing mechanism provided in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the main three-dimensional structure provided in an embodiment of the present utility model.

[0016] In the diagram: 1. Crushing assembly; 101. Crushing box; 102. Feed inlet; 103. Crusher; 104. Discharge plate; 2. Pressing mechanism; 201. Dustproof plate; 202. Stepper motor; 203. Transmission component; 204. Connecting rod; 205. Cam; 206. Pressing plate; 3. Pushing mechanism; 301. Servo motor; 302. Reciprocating screw; 303. Transmission block; 304. Guide rod; 305. Stroke plate; 306. Mounting plate; 307. Telescopic baffle. Detailed Implementation

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0018] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0020] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0021] Example 1 Reference Figure 1-4The first embodiment of this utility model provides a crushing assembly 1 including a crushing box 101, a feed inlet 102, a crusher 103, and a discharge plate 104. The upper end of the crushing box 101 is fixedly connected to the lower end of the feed inlet 102, the interior of the crushing box 101 is fixedly connected to the surface of the crusher 103, and the lower end of the crushing box 101 is rotatably connected to the discharge plate 104 by a snap fastener. A pressing mechanism 2 is provided at the lower end of the crushing box 101, and a pushing mechanism 3 is provided on the pressing mechanism 2. The pressing mechanism 2 is used to press the crushed waste paper, and the pushing mechanism 3 is used to collect the waste paper.

[0022] Specifically, the shredding component 1 completely destroys the cost documents through the shredder 103, preventing information leakage and ensuring data security. In conjunction with the pushing mechanism 3 and pressing mechanism 2 set in the storage cavity, it effectively solves the problems of loose, large-volume, and inconvenient storage of shredded paper scraps. Through the synergistic effect of spraying adhesive and compression, the paper scraps are compressed into high-density clumps, improving the utilization rate of storage space, reducing processing costs, and facilitating the centralized recycling and resource utilization of waste paper.

[0023] Furthermore, in the process of processing cost documents for interior and exterior decoration, in order to achieve the safe destruction and recycling of waste paper documents, the documents to be shredded are first put into the feed port 102 at the top of the shredder 101. After starting, the shredder 103 inside the shredder 101 starts to operate, using high-speed rotating blades to perform longitudinal and transverse cross-cutting on the documents to achieve thorough shredding and ensure that the information cannot be recovered. The shredded paper scraps fall naturally under the action of gravity and enter the collection chamber set below the shredder 103. In order to improve the collection efficiency and reduce the frequent emptying operation, a compression mechanism is set in the collection chamber. At the same time, before compression, an environmentally friendly adhesive is evenly sprayed onto the paper scraps by the built-in spray device to enhance the cohesion between the paper scraps and provide a basis for subsequent compression molding. After compression, the operator can open the discharge plate 104 at the front end of the collection chamber to remove the molded waste paper ball as a whole for centralized transportation or resource treatment.

[0024] Example 2 The second embodiment of this utility model provides a pressing mechanism 2 including a dustproof plate 201, a stepper motor 202, a transmission component 203, a connecting rod 204, a cam 205, and a pressing plate 206. The inner wall of the dustproof plate 201 is fixedly connected to the surface of the stepper motor 202. The tooth surface of the output end of the stepper motor 202 meshes with the inner tooth surface of the transmission component 203. The tooth surfaces of the inner walls at both ends of the transmission component 203 respectively mesh with the rear tooth surfaces of the two connecting rods 204. The surface of the connecting rod 204 is fixedly connected to the inner wall of the cam 205. The surface of the cam 205 contacts the surface of the pressing plate 206. The surface of the dustproof plate 201 is slidably connected to the rear end of the crushing box 101. The stepper motor 202 and the transmission component 203 are disposed inside the dustproof plate 201.

[0025] Specifically, the pressing mechanism 2 drives the transmission component 203 through the stepper motor 202 to drive the connecting rods 204 on both sides to rotate synchronously. The cam 205 periodically pushes the pressing plate 206 to achieve intermittent compaction of the paper scraps. The dustproof plate 201 effectively isolates the driving components from the dusty environment and ensures the stable operation of the transmission system. This structure solves the problems of loose accumulation, large volume and inconvenience of collection of shredded paper scraps. The compression ratio is significantly improved by secondary pressurization, reducing subsequent storage and transportation costs, while ensuring stable waste molding and easy demolding.

[0026] Furthermore, after the mounting plate 306 completes the initial pressing, the secondary pressing mechanism to further enhance the compression density begins to work. The stepper motor 202 built into the rear of the mounting plate 306 starts, and its output end drives the connecting rods 204 on both sides to rotate synchronously through the gear transmission component 203. The cam 205 on the connecting rod 204 rotates accordingly. During the rotation, the cam 205 periodically pushes the pressing plate 206 set on the inner wall of the mounting plate 306, causing it to extend forward along the guide groove and apply intermittent impact pressure to the paper scraps that have been initially compressed. The elastic structure of the pressing plate 206 can adapt to the unevenness of the paper scrap surface, ensuring uniform pressure distribution, thereby achieving deep compaction and forming a high-density, low-volume waste paper slab.

[0027] Example 3 The third embodiment of this utility model provides a pushing mechanism 3 including a servo motor 301, a reciprocating screw 302, a transmission block 303, a guide rod 304, a stroke plate 305, a mounting plate 306, and a telescopic baffle 307. The output end of the servo motor 301 is fixedly connected to the right end of the reciprocating screw 302. The surface of the reciprocating screw 302 is threadedly connected to the inner wall of the transmission block 303. Both ends of the guide rod 304 are fixedly connected to the inner wall of the stroke plate 305. The upper end of the mounting plate 306 is fixedly connected to the left end of the telescopic baffle 307. The surface of the servo motor 301 is fixedly connected to the right end of the crushing box 101. Both ends of the reciprocating screw 302 are rotatably connected to the inner wall of the stroke plate 305. The transmission block 303 is slidably connected to the inner rear wall of the crushing box 101 via a sliding groove. The travel plate 305 is fixedly connected to the rear end of the crushing box 101. The mounting plate 306 is slidably connected to the inner wall of the crushing box 101. The left end of the telescopic baffle 307 is fixedly connected to the inner wall of the crushing box 101. The inner wall of the mounting plate 306 is slidably connected to the surface of the pressing plate 206. The two ends of the connecting rod 204 are rotatably connected to the inner wall of the mounting plate 306. The surface of the dustproof plate 201 is fixedly connected to the rear end surface of the mounting plate 306. The surface of the guide rod 304 is slidably connected to the inner rear wall of the dustproof plate 201. The transmission block 303 is fixedly connected to the rear end of the dustproof plate 201.

[0028] Specifically, the pushing mechanism 3 drives the reciprocating screw 302 and the transmission block 303 through the threaded transmission of the servo motor 301. Combined with the stable support of the guide rod 304 and the stroke plate 305, it realizes the smooth linear advancement of the mounting plate 306 in the storage cavity. The telescopic baffle 307 unfolds synchronously with the mounting plate 306, effectively isolating the compression zone and the material drop zone, avoiding paper scrap backflow, and solving the problems of uneven material distribution and low compression efficiency in the traditional compression process. At the same time, it works with the capacity sensor to realize on-demand compression, improving the intelligence level and space utilization of the equipment.

[0029] Furthermore, when the paper scraps accumulate to a certain volume, the servo motor 301 at the rear end of the shredder 101 starts, and the reciprocating screw 302 connected to its output end begins to rotate. Since the inner wall of the transmission block 303 and the reciprocating screw 302 form a threaded engagement, the rotation of the screw is converted into the linear motion of the transmission block 303 along the axial direction, thereby driving the mounting plate 306 fixedly connected to it to move smoothly in the storage cavity. During the movement, the mounting plate 306 performs preliminary compression and collection of the scattered paper scraps, concentrating them at the front end of the storage cavity. During this process, the telescopic baffle 307 set at the upper end of the mounting plate 306 unfolds simultaneously, forming a closed pushing surface, effectively preventing newly fallen paper scraps from bypassing the mounting plate 306 and entering the rear space, ensuring the cleanliness of the compression area and the consistency of the compression effect. The compression stroke is monitored in real time by the capacity sensor in the storage cavity, and the signal is fed back to the control system to dynamically adjust the running time of the servo motor 301 and the feed distance of the reciprocating screw 302 to achieve compression on demand.

[0030] Working principle: In the process of processing cost documents for interior and exterior decoration, to ensure the safe destruction and recycling of waste paper documents, the documents to be shredded are first fed into the feed inlet 102 at the top of the shredder 101. After startup, the shredder 103 inside the shredder 101 starts operating, using high-speed rotating blades to perform longitudinal and transverse cross-shredding of the documents to achieve thorough shredding and ensure that the information cannot be recovered. The shredded paper scraps fall naturally under the action of gravity and enter the collection chamber set below the shredder 103. To improve collection efficiency and reduce frequent emptying operations, a compression mechanism is set in the collection chamber. At the same time, before compression, a built-in spray device sprays the paper... Environmentally friendly adhesive is evenly sprayed onto the paper scraps to enhance their cohesion and provide a foundation for subsequent compression molding. When the paper scraps accumulate to a certain volume, the servo motor 301 at the rear of the shredder 101 starts, and the reciprocating screw 302 connected to its output end begins to rotate. Since the inner wall of the transmission block 303 forms a threaded fit with the reciprocating screw 302, the rotation of the screw is converted into the linear motion of the transmission block 303 along the axial direction, thereby driving the mounting plate 306 fixedly connected to it to move smoothly in the storage cavity. During the movement, the mounting plate 306 initially squeezes and collects the scattered paper scraps, concentrating them at the front end of the storage cavity. During this process, the mounting plate 306... The telescopic baffle 307 at the upper end of the mounting plate 306 unfolds synchronously to form a closed pressing surface, effectively preventing newly fallen paper scraps from bypassing the mounting plate 306 and entering the rear space, ensuring the cleanliness of the compression area and the consistency of the compression effect. The compression stroke is monitored in real time by the capacity sensor in the storage cavity, and the signal is fed back to the control system to dynamically adjust the running time of the servo motor 301 and the feed distance of the reciprocating screw 302 to achieve on-demand compression. After the mounting plate 306 completes the initial pressing, the secondary pressurization mechanism that further improves the compression density starts to work. The stepper motor 202 built into the rear side of the mounting plate 306 starts, and its output end is driven by a gear transmission component. 203 synchronously drives the connecting rods 204 on both sides to rotate, and the cam 205 on the connecting rod 204 rotates accordingly. During the rotation, the cam 205 periodically pushes the pressing plate 206 set on the inner wall of the mounting plate 306, so that it extends forward along the guide groove and applies intermittent impact pressure to the preliminarily compressed paper scraps. The elastic structure of the pressing plate 206 can adapt to the unevenness of the paper scrap surface, ensuring that the pressure is evenly distributed, thereby achieving deep compaction and forming a high-density, low-volume waste paper slab. After compression, the operator can open the discharge plate 104 at the front end of the collection cavity to remove the formed waste paper slab as a whole, which is convenient for centralized transportation or resource recycling.

[0031] In summary, through the coordinated operation of components such as servo motors, reciprocating screws, transmission blocks, mounting plates, telescopic baffles, stepper motors, transmission parts, connecting rods, cams, and pressing plates, the system achieves the collection, segmented compression, and shaping of shredded paper scraps, improving the space utilization of the storage chamber and the efficiency of waste paper processing. At the same time, the adhesive assistance and multi-stage pressurization mechanism ensure the structural stability of the waste paper clumps, facilitating subsequent storage and recycling.

[0032] The crusher, stepper motor and servo motor used in the technical means of this application can be additionally equipped with protective measures that are common knowledge in the technical field under different usage environments, including but not limited to the following methods, such as protective covers for equipment protection, dustproof nets for equipment dust prevention, and sealing components or waterproof coatings for equipment waterproofing, which are common technical means used by those skilled in the art.

[0033] It should be noted that (the crusher, stepper motor, transmission component, servo motor, reciprocating screw, and telescopic baffle) are existing devices or equipment, or devices or equipment that can be implemented with existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are all common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0034] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0035] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0036] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A document shredding device for indoor and outdoor decoration cost estimates, characterized in that: The invention includes a crushing assembly (1) for indoor and outdoor decoration cost estimation. The crushing assembly (1) includes a crushing box (101), a feed inlet (102), a crusher (103), and a discharge plate (104). The upper end of the crushing box (101) is fixedly connected to the lower end of the feed inlet (102). The interior of the crushing box (101) is fixedly connected to the surface of the crusher (103). The lower end of the crushing box (101) is rotatably connected to the discharge plate (104) by a snap fastener. The lower end of the shredder (101) is provided with a pressing mechanism (2), and the pressing mechanism (2) is provided with a pushing mechanism (3). The pressing mechanism (2) is used to press the shredded waste paper, and the pushing mechanism (3) is used to sort the waste paper.

2. The indoor and outdoor decoration cost file shredding device according to claim 1, characterized in that: The pressing mechanism (2) includes a dustproof plate (201), a stepper motor (202), a transmission component (203), a connecting rod (204), a cam (205), and a pressing plate (206). The inner wall of the dustproof plate (201) is fixedly connected to the surface of the stepper motor (202). The tooth surface of the output end of the stepper motor (202) meshes with the inner tooth surface of the transmission component (203). The tooth surfaces of the inner walls at both ends of the transmission component (203) mesh with the rear tooth surfaces of the two connecting rods (204). The surface of the connecting rod (204) is fixedly connected to the inner wall of the cam (205). The surface of the cam (205) is in contact with the surface of the pressing plate (206).

3. The indoor and outdoor decoration cost file shredding device according to claim 2, characterized in that: The surface of the dustproof plate (201) is slidably connected to the rear end of the crushing box (101), and the stepper motor (202) and the transmission component (203) are disposed inside the dustproof plate (201).

4. The indoor and outdoor decoration cost file shredding device according to claim 2, characterized in that: The pushing mechanism (3) includes a servo motor (301), a reciprocating screw (302), a transmission block (303), a guide rod (304), a stroke plate (305), a mounting plate (306), and a telescopic baffle (307). The output end of the servo motor (301) is fixedly connected to the right end of the reciprocating screw (302). The surface of the reciprocating screw (302) is threadedly connected to the inner wall of the transmission block (303). Both ends of the guide rod (304) are fixedly connected to the inner wall of the stroke plate (305). The upper end of the mounting plate (306) is fixedly connected to the left end of the telescopic baffle (307).

5. The indoor and outdoor decoration cost document shredding device according to claim 4, characterized in that: The surface of the servo motor (301) is fixedly connected to the right end of the crushing box (101), the two ends of the reciprocating screw (302) are rotatably connected to the inner wall of the stroke plate (305), the surface of the transmission block (303) is slidably connected to the rear inner wall of the crushing box (101) through a sliding groove, the surface of the stroke plate (305) is fixedly connected to the rear end of the crushing box (101), the surface of the mounting plate (306) is slidably connected to the inner wall of the crushing box (101), and the left end of the telescopic baffle (307) is fixedly connected to the inner wall of the crushing box (101).

6. The indoor and outdoor decoration cost file shredding device according to claim 4, characterized in that: The inner wall of the mounting plate (306) is in sliding connection with the surface of the pressing plate (206), both ends of the connecting rod (204) are in rotary connection with the inner wall of the mounting plate (306), and the surface of the dustproof plate (201) is fixedly connected with the rear end surface of the mounting plate (306).

7. The indoor and outdoor decoration cost document shredding device according to claim 4, characterized in that: The surface of the guide rod (304) is in sliding connection with the rear inner wall of the dustproof plate (201), and the surface of the transmission block (303) is fixedly connected with the rear end of the dustproof plate (201).

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