A blade adjustment device for a straw crushing apparatus

Abstract

This utility model discloses a blade adjustment device for a straw crushing apparatus, including a prism-shaped blade holder and an adjustment screw B located at the left end and an adjustment screw A located at the right end of the prism-shaped blade holder. A metal sleeve A is fitted around the adjustment screw A, and a fixed support plate A is fixedly fitted around the metal sleeve A. A metal sleeve B is fitted around the adjustment screw B. By adding a fine adjustment device to the top of the right end of the prism-shaped blade holder and the top of the fixed support plate A, this device, together with the adjustment screw A, adjustment screw B, and adjustment locking nut, forms a dual adjustment system of coarse and fine adjustment. This solves the problem of the traditional single adjustment structure's difficulty in accurately controlling the blade spacing, and significantly improves the convenience, stability, and accuracy of adjusting the blade spacing of the straw crushing apparatus. It effectively ensures the material fineness meets the standard during crushing operations, while reducing blade wear caused by improper spacing and extending the equipment's service life.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology, specifically relating to a blade adjustment device for a straw crushing device. Background Technology

[0002] As the core equipment for the resource utilization of straw (such as returning straw to the field for fertilization, feed processing, and biomass fuel preparation), the straw crushing device's crushing efficiency and the fineness of the finished product directly depend on the rationality of the blade spacing. If the blade spacing is too large, it will easily lead to "missed cutting" of straw, resulting in a large amount of coarse material that needs to be crushed again, reducing operating efficiency. If the spacing is too small, it will increase the cutting resistance of the blades, causing material jamming, motor overload, and accelerating blade wear, thus increasing equipment maintenance costs. The blade adjustment device of the straw crushing device is a key auxiliary mechanism used to adjust the spacing of the crushing blades (fixed blades and moving blades) and compensate for blade wear. Its performance directly affects the overall operational stability, energy consumption level, and applicable scenarios of the straw crushing device, and is a core component to ensure the continuous and efficient operation of straw crushing.

[0003] However, existing adjustment devices require loosening multiple locking bolts before coarse adjustment by manually pushing the blade holder or rotating the adjusting screw. This lack of intuitive precision reference necessitates repeated test runs (no-load operation - feeding and trial crushing - stopping for adjustment) to find the appropriate spacing. This process is not only time-consuming and labor-intensive (each adjustment takes 15-20 minutes) but also highly dependent on operator experience. Novice operators are prone to over- or under-adjustment, leading to poor crushing results or even equipment malfunctions. Furthermore, existing adjustment screws often employ a large pitch design, meaning that each rotation of the screw only displaces the blade holder by 1-2 mm, failing to achieve millimeter-level precision. The following minor adjustments are necessary, but the precision requirements for blade spacing vary significantly depending on the type of straw material (such as wheat straw, corn straw, and cotton straw) and the application scenario (such as a 0.5-2mm spacing for fine feed grinding and a 3-8mm spacing for coarse grinding for returning to the field). For example, when grinding soft wheat straw, a spacing deviation of only 0.5mm may result in some straw not being fully cut, leading to substandard fineness of the finished product. When grinding coarse corn straw, a large spacing adjustment deviation may cause rigid collision between the blade and the material, resulting in blade jamming. This "coarse adjustment-oriented" structure makes it difficult for the device to accurately match diverse grinding needs, limiting the applicability of the straw grinding device. Utility Model Content

[0004] The purpose of this utility model is to provide a blade adjustment device for a straw crushing apparatus, in order to solve the problem mentioned in the background art that when adjusting the spacing of the existing adjustment device, multiple locking bolts must be loosened first, and then the blade seat must be manually pushed or the adjustment screw turned for coarse adjustment. Due to the lack of intuitive precision reference, the operator needs to repeatedly test the machine to find the appropriate spacing. Not only is each adjustment time-consuming and laborious, but it also relies heavily on experience. Novices are prone to poor crushing effect or even equipment failure due to improper adjustment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a blade adjustment device for a straw crushing apparatus, comprising a prism blade holder and an adjustment screw B respectively disposed at the left end and the right end of the prism blade holder. A metal sleeve A is sleeved around the adjustment screw A, and a fixed support plate A is fixedly sleeved around the metal sleeve A. A metal sleeve B is sleeved around the adjustment screw B, and a fixed support plate B is fixedly sleeved around the metal sleeve B. Screw fixing plates are provided at the bottom ends of both the fixed support plate A and the fixed support plate B are both vertically downwards. The two screw fixing plates are fixed to corresponding fixed positions in the straw crushing apparatus by multiple screws. A fine adjustment device is connected between the top of the right end of the prism blade holder and the top of the fixed support plate A.

[0006] Preferably, the fine adjustment device includes a screw fixing block, a metal mounting base block, and a fine adjustment screw. The left and right ends of the metal mounting base block are fixed to the top right end of the prism tool holder by screws. The screw fixing block is welded to the top of the metal mounting base block, and the fine adjustment screw is welded to the right end of the screw fixing block near the top.

[0007] Preferably, the fine adjustment screw is located above the right end of the prism cutter holder and above the adjustment screw A. The fine adjustment screw is parallel to the prism cutter holder and the adjustment screw A. The fine adjustment screw is a solid metal screw with a diameter smaller than that of the adjustment screw A.

[0008] Preferably, the fine adjustment device further includes an anti-loosening adjusting nut, a fine adjustment bracket plate, and an internal thread adjusting cylinder. The fine adjustment bracket plate is welded to the top of the fixed bracket plate A. A movable hole is provided inside the upper side of the center of the fine adjustment bracket plate. An internal thread adjusting cylinder is inserted into the movable hole. Anti-loosening adjusting nuts are sleeved and fixed on the outside of both ends of the internal thread adjusting cylinder. The internal thread adjusting cylinder is threaded onto the outside of the fine adjustment screw.

[0009] Preferably, the two anti-loosening adjusting nuts are respectively blocked at the left and right ends of the fine adjustment bracket plate, and the two anti-loosening adjusting nuts allow the internal thread adjusting cylinder to rotate clockwise and counterclockwise in the movable hole, but the two anti-loosening adjusting nuts will prevent the internal thread adjusting cylinder from moving left and right during rotation.

[0010] Preferably, the right end of the fine adjustment screw is parallel to the right end of the adjustment screw A, and the clockwise and counterclockwise rotation of the internal threaded adjustment cylinder can cause the fine adjustment screw to move left and right through the thread action, thereby driving the prism cutter holder to move left and right.

[0011] Preferably, the outer wall of the right end of the metal sleeve A is flush with the outer wall of the right end of the fixed bracket plate A, and the outer wall of the left end of the metal sleeve B is flush with the outer wall of the left end of the fixed bracket plate B. Adjusting locking nuts are provided on the right side of the metal sleeve A and the left side of the metal sleeve B. The two adjusting locking nuts are respectively threaded onto the outside of the adjusting screw A and the adjusting screw B. When the two adjusting locking nuts are tightened on the right end of the fixed bracket plate A and the left end of the fixed bracket plate B, the two adjusting locking nuts can prevent the prism tool holder from moving left and right.

[0012] Preferably, the lower half of the prism blade holder has multiple blade fixing slots equidistantly arranged inside, the multiple blade fixing slots are arranged equidistantly from left to right, the left inner wall of each of the multiple blade fixing slots is fixed with a blade handle by screws, and the bottom of each of the multiple blade handles is provided with a crushing blade, the multiple crushing blades are arranged vertically downward below the prism blade holder.

[0013] Preferably, a metal limiting plate is also horizontally welded to the outer wall of the top of the prism tool holder. A sliding groove is horizontally provided inside the metal limiting plate. Multiple U-shaped limiting blocks are inserted into the sliding groove. The U-shaped limiting blocks all have their U-shaped openings facing upwards, and all U-shaped limiting blocks can move left and right in the sliding groove.

[0014] Preferably, a fixed connecting bracket is inserted into the U-shaped opening at the top of each of the multiple U-shaped limiting blocks, and the fixed connecting bracket is fixedly connected to the U-shaped limiting block by multiple screws. A top fixing plate is welded to the top of the fixed connecting bracket, and the top fixing plate is fixed to the corresponding fixed position of the straw crushing device by screws. The combination of the U-shaped limiting block, the metal limiting plate, the sliding groove, the top fixing plate and the fixed connecting bracket can prevent the prism blade holder from rotating during adjustment and use.

[0015] Compared with the prior art, this utility model provides a blade adjustment device for a straw crushing apparatus, which has the following beneficial effects:

[0016] This invention adds a fine adjustment device to the top of the right end of the prism blade holder and the top of the fixed support plate A. This device, together with the adjusting screw A, adjusting screw B, and adjusting locking nut, forms a dual adjustment system of coarse and fine adjustment. This solves the problem of the traditional single adjustment structure being unable to accurately control the blade spacing, and greatly improves the convenience, stability, and accuracy of adjusting the blade spacing of the straw crushing device. It effectively ensures the material fineness compliance rate during crushing operations, while reducing blade wear caused by improper spacing and extending the service life of the equipment. The main function of this device is to adjust the blade spacing of the straw crushing device (here, the distance between the crushing blade on the prism blade holder and the fixed blade in the straw crushing device is adjusted). After loosening the two adjusting locking nuts, the distance between the blades can be finely adjusted through this device to make the distance between the blades more accurate.

[0017] Compared to the conventional coarse adjustment of adjusting screws A and B on the blade adjustment device of the straw crushing device, the fine adjustment device uses the threaded engagement of the internal threaded adjusting cylinder and the fine adjusting screw. Rotating the internal threaded adjusting cylinder can drive the fine adjusting screw and the prism blade holder to move slightly, improving the spacing adjustment accuracy to meet the stringent spacing requirements of different materials. This avoids problems such as excessive coarse material or material jamming caused by spacing deviation. The internal threaded adjusting cylinder of the fine adjustment device is limited in the movable hole of the fine adjustment bracket plate by the anti-loosening adjusting nut. The operator does not need to use large tools, but only needs to use an adjustable wrench to rotate the internal threaded adjusting cylinder to drive the spacing adjustment. During the adjustment process, the adjustment amount can be controlled in real time by observing the gap positioning scale. There is no need for repeated disassembly and trial and error, which greatly reduces the difficulty of operation and improves the adjustment efficiency. Attached Figure Description

[0018] Figure 1 This is a front-view three-dimensional structural diagram of the blade adjustment device of a straw crushing device according to the present invention.

[0019] Figure 2 This is a front view schematic diagram of the blade adjustment device of a straw crushing device according to the present invention.

[0020] Figure 3 This is a bottom-view three-dimensional structural diagram of the blade adjustment device of a straw crushing device according to the present invention.

[0021] Figure 4 This is a front-view three-dimensional structural diagram of the fine adjustment device of this utility model.

[0022] In the diagram: 1. Screw fixing plate; 2. Fixing bracket plate A; 3. Adjusting screw A; 4. Crusher; 5. Handle; 6. Blade fixing groove; 7. Prism blade holder; 8. Fixing bracket plate B; 9. Adjusting locking nut; 10. Metal sleeve B; 11. Adjusting screw B; 12. U-shaped limiting block; 13. Metal limiting plate; 14. Sliding groove; 15. Top fixing plate; 16. Fixing connecting bracket; 17. Fine adjustment device; 18. Metal sleeve A; 19. Screw fixing block; 20. Metal mounting base block; 21. Fine adjustment screw; 22. Anti-loosening adjusting nut; 23. Fine adjustment bracket plate; 24. Internal thread adjusting cylinder. Detailed Implementation

[0023] 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.

[0024] This utility model provides, for example Figure 1-4The straw crushing device blade adjustment device shown is based on a prism blade holder 7 as its core supporting structure. The prism blade holder 7 serves as the core fixing carrier for the crushing blades 4. Multiple blade fixing slots 6 are evenly spaced from left to right in its lower half. This even distribution ensures the uniform distribution of multiple sets of crushing blades 4, avoiding crushing blind spots or material accumulation caused by uneven blade spacing during operation. A blade handle 5 is fixed to the inner wall of the left end of each blade fixing slot 6 by screws. The crushing blade 4 is vertically positioned at the bottom of the blade handle 5. This vertical arrangement allows the crushing blade 4 to form a perpendicular cutting angle with the straw material, improving cutting efficiency. Simultaneously, the screw fixing method facilitates individual replacement of worn blades, reducing maintenance costs without requiring replacement of the entire blade holder. An adjusting screw B11 is located at the left end of the prism blade holder 7, and an adjusting screw A3 is located at the right end. The two sets of screws are horizontally symmetrically distributed, ensuring balanced force on both sides of the blade holder and preventing unilateral offset during adjustment. A metal sleeve A18 is fitted around the adjusting screw A3 for adjustment. A metal sleeve B10 is fitted onto the outside of the screw B11. The inner diameter of the metal sleeve precisely matches the outer diameter of the screw (the gap is controlled within 0.05-0.1mm). This provides lateral sliding guidance for the screw and reduces direct friction between the screw and the support plate, extending the screw's service life. A fixed support plate A2 is fitted onto the outside of the metal sleeve A18, and a fixed support plate B8 is fitted onto the outside of the metal sleeve B10. The outer wall of the right end of the metal sleeve A18 is flush with the outer wall of the right end of the fixed support plate A2. The outer wall of the left end of the sleeve is flush with the outer wall of the left end of the fixed support plate B8. This flush design ensures that the force-bearing surface of the sleeve and the support plate are completely in contact, avoiding deformation of the sleeve due to uneven force during adjustment. Both the fixed support plate A2 and the fixed support plate B8 are set vertically downwards. The screw fixing plate 1 at the bottom is fixed to the corresponding fixed position of the straw crushing device by multiple screws. The vertical layout and the combination of multiple screws can firmly lock the support plate, providing stable support for the subsequent adjustment structure and preventing the support plate from shifting due to vibration during operation.

[0025] like Figure 1 , Figure 2 and Figure 3 As shown, adjusting locking nuts 9 are respectively installed on the right side of metal sleeve A18 and the left side of metal sleeve B10. The two nuts are threaded onto the outside of adjusting screw A3 and adjusting screw B11, respectively. When it is necessary to fix the position of the prism blade holder 7, the two adjusting locking nuts 9 are tightened toward the right end of the fixed bracket plate A2 and the left end of the fixed bracket plate B8, respectively. After the nuts are tightly fitted with the end face of the bracket plate, a double lock is formed by the self-locking force of the threads and the friction of the end face, which completely prevents the prism blade holder 7 from moving left and right. The core advantage of this design is that it can quickly lock and strengthen the fixation, avoiding the blade holder displacement caused by vibration during the crushing operation (the blade rotates at a speed of 1000-3000 r / min), ensuring the stability of the spacing between the crushing blades 4, and thus ensuring the uniformity of the crushing fineness.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, to prevent the prism-shaped cutter holder 7 from rotating during adjustment or operation (rotation would cause the cutting angle of the crusher blade 4 to shift, leading to material jamming or blade wear), the device is designed with multiple anti-rotation structures. A metal limiting plate 13 is horizontally welded to the outer wall of the top of the prism-shaped cutter holder 7. A sliding groove 14 is horizontally provided inside the metal limiting plate 13. Multiple U-shaped limiting blocks 12 (U-shaped openings facing upwards) are inserted into the sliding groove 14, and the U-shaped limiting blocks 12 can move left and right in the sliding groove 14. This sliding fit not only reserves space for the horizontal adjustment of the cutter holder (without affecting the spacing adjustment action), but also restricts the vertical and horizontal rotation of the cutter holder through the wrapping insertion of the U-shaped limiting blocks 12. Fixed connecting brackets 16 are inserted into the U-shaped openings at the top of the multiple U-shaped limiting blocks 12, and the two are connected by screws. The top of the fixed connecting bracket 16 is welded with a top fixing plate 15, which is fixed to the corresponding fixed position of the crushing device by screws. The combination of the U-shaped limiting block 12, the fixed connecting bracket 16, and the top fixing plate 15 forms a rigid connection from the blade holder to the main body of the device, which strictly limits the range of motion of the blade holder to the lateral sliding dimension and completely prevents the blade holder from rotating. The advantage of this anti-rotation structure is that, on the one hand, it ensures that the blade holder only moves laterally during adjustment, and the spacing of the crushing blades 4 is adjusted accurately without deviation of the spacing of multiple sets of blades due to rotation. On the other hand, it can resist the radial torque generated by the high-speed rotation of the crushing blades 4 during operation, avoiding blade collisions, abnormal noises and other malfunctions caused by the rotation of the blade holder, and significantly improving the safety and stability of the device operation.

[0027] like Figure 1 and Figure 4 As shown, to address the insufficient precision of traditional coarse adjustment structures, a fine adjustment device 17 is connected to the top of the right end of the prism tool holder 7 and the top of the fixed support plate A2. The fine adjustment device 17 includes a metal mounting base 20, a screw fixing block 19, and a fine adjustment screw 21. The left and right ends of the metal mounting base 20 are fixed to the top of the right end of the prism tool holder 7 with screws. This screw fixing method facilitates later disassembly and maintenance. The top of the metal mounting base 20 is welded with the screw fixing block 19. The welding process ensures the connection strength between the two and prevents components from falling off due to adjustment force. The screw fixing block 19 is welded near the top right end. There is a fine adjustment screw 21, which is located above the right end of the prism cutter holder 7 and above the adjustment screw A3, and is parallel to the prism cutter holder 7 and the adjustment screw A3. The parallel layout allows the lateral driving force of the fine adjustment screw 21 to be fully transmitted to the cutter holder, avoiding adjustment offset caused by angular deviation. At the same time, the fine adjustment screw 21 is an internal solid metal screw, and its diameter is smaller than that of the adjustment screw A3 (usually 1 / 2 to 2 / 3 of the diameter of the adjustment screw A3). The smaller diameter can reduce the impact of the screw's own weight on the adjustment accuracy, and the solid structure can withstand greater adjustment torque and prevent the screw from breaking.

[0028] like Figure 1 and Figure 4 As shown, the fine adjustment device 17 also includes a fine adjustment bracket plate 23, an internal thread adjustment cylinder 24, and an anti-loosening adjustment nut 22. The fine adjustment bracket plate 23 is welded to the top of the fixed bracket plate A2, forming a corresponding support for the adjustment structure on the tool holder side. The fine adjustment bracket plate 23 has a movable hole on the upper side of its center. The internal thread adjustment cylinder 24 is inserted into the movable hole. The internal thread adjustment cylinder 24 is threadedly engaged with the fine adjustment screw 21 (the thread pitch is designed to be 0.2-0.5mm, which is much smaller than the 1-2mm thread pitch of the adjustment screw A3). By rotating the internal thread adjustment cylinder 24, the fine adjustment screw 21 is driven to move slightly left and right using the thread transmission principle, thereby driving the prism tool holder 7 to move synchronously, achieving 0. The 1-0.2mm pitch micro-adjustment meets the precision requirements of different scenarios such as fine feed grinding (0.5-2mm) and coarse grinding for returning to the field (3-8mm). The internal thread adjusting cylinder 24 has anti-loosening adjusting nuts 22 sleeved and fixed on both the left and right ends. The two nuts block the fine adjustment bracket plate 23 on the left and right ends respectively. The core principle of this design is limited but not limited rotation. The anti-loosening adjusting nuts 22 can prevent the internal thread adjusting cylinder 24 from moving left and right during rotation, ensuring the stability of the thread transmission. At the same time, it does not restrict the clockwise and counterclockwise rotation of the internal thread adjusting cylinder 24, allowing the operator to complete the adjustment by simply rotating the internal thread adjusting cylinder 24 with an adjustable wrench, without the need for large tools, which greatly improves the convenience of operation.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blade adjustment device for a straw crushing apparatus, comprising a prism blade holder (7) and an adjustment screw B (11) disposed at the left end and an adjustment screw A (3) disposed at the right end of the prism blade holder (7), wherein a metal sleeve A (18) is sleeved on the outside of the adjustment screw A (3), and a fixed support plate A (2) is sleeved and fixed on the outside of the metal sleeve A (18); a metal sleeve B (10) is sleeved on the outside of the adjustment screw B (11), and a fixed support plate B (8) is sleeved and fixed on the outside of the metal sleeve B (10); both the fixed support plate A (2) and the fixed support plate B (8) are provided with screw fixing plates (1) at their bottom ends; both the fixed support plate A (2) and the fixed support plate B (8) are vertically downward, and the two screw fixing plates (1) are fixed to the corresponding fixed positions of the straw crushing apparatus by a plurality of screws, characterized in that: The top right end of the prism knife holder (7) is connected to the top of the fixed support plate A (2) by a fine adjustment device (17); The fine adjustment device (17) includes a screw fixing block (19), a metal mounting base block (20), and a fine adjustment screw (21). The left and right ends of the metal mounting base block (20) are fixed to the top right end of the prism knife holder (7) by screws. The top of the metal mounting base block (20) is welded with the screw fixing block (19), and the fine adjustment screw (21) is welded to the right end of the screw fixing block (19) near the top.

2. The blade adjustment device for a straw crushing apparatus according to claim 1, characterized in that: The fine adjustment screw (21) is located above the right end of the prism cutter holder (7) and above the adjustment screw A (3). The fine adjustment screw (21) is parallel to the prism cutter holder (7) and the adjustment screw A (3). The fine adjustment screw (21) is a solid metal screw, and the diameter of the fine adjustment screw (21) is smaller than the diameter of the adjustment screw A (3).

3. The blade adjustment device for a straw crushing apparatus according to claim 2, characterized in that: The fine adjustment device (17) also includes an anti-loosening adjustment nut (22), a fine adjustment bracket plate (23), and an internal thread adjustment cylinder (24). The top of the fixed bracket plate A (2) is welded with a fine adjustment bracket plate (23). The fine adjustment bracket plate (23) has a movable hole on the upper side of the center of the center. An internal thread adjustment cylinder (24) is inserted into the movable hole. Anti-loosening adjustment nuts (22) are fixedly sleeved on both the left and right ends of the internal thread adjustment cylinder (24). The internal thread adjustment cylinder (24) is threaded onto the outside of the fine adjustment screw (21).

4. The blade adjustment device for a straw crushing apparatus according to claim 3, characterized in that: The two anti-detachment adjusting nuts (22) are respectively blocked at the left and right ends of the fine adjustment bracket plate (23), and the two anti-detachment adjusting nuts (22) allow the internal thread adjusting cylinder (24) to rotate clockwise and counterclockwise in the movable hole, but the two anti-detachment adjusting nuts (22) will prevent the internal thread adjusting cylinder (24) from moving left and right during rotation.

5. The blade adjustment device for a straw crushing apparatus according to claim 4, characterized in that: The right end of the fine adjustment screw (21) is parallel to the right end of the adjustment screw A (3), and the clockwise and counterclockwise rotation of the internal threaded adjustment cylinder (24) can cause the fine adjustment screw (21) to move left and right through the thread action, which in turn drives the prism cutter holder (7) to move left and right.

6. The blade adjustment device for a straw crushing apparatus according to claim 1, characterized in that: The outer wall of the right end of the metal sleeve A (18) is flush with the outer wall of the right end of the fixed bracket plate A (2), and the outer wall of the left end of the metal sleeve B (10) is flush with the outer wall of the left end of the fixed bracket plate B (8). Adjustment locking nuts (9) are provided on the right side of the metal sleeve A (18) and the left side of the metal sleeve B (10). The two adjustment locking nuts (9) are respectively threaded onto the outside of the adjustment screw A (3) and the adjustment screw B (11). When the two adjustment locking nuts (9) are tightened on the right end of the fixed bracket plate A (2) and the left end of the fixed bracket plate B (8), the two adjustment locking nuts (9) can prevent the prism cutter holder (7) from moving left and right.

7. The blade adjustment device for a straw crushing apparatus according to claim 6, characterized in that: The lower half of the prism blade holder (7) is provided with multiple blade fixing slots (6) at equal intervals. The multiple blade fixing slots (6) are arranged at equal intervals from left to right. The left inner wall of each of the multiple blade fixing slots (6) is fixed with a handle (5) by screws. The bottom of each of the multiple handles (5) is provided with a crushing blade (4). The multiple crushing blades (4) are arranged vertically downward below the prism blade holder (7).

8. The blade adjustment device for a straw crushing apparatus according to claim 7, characterized in that: The outer wall of the top of the prism knife holder (7) is also horizontally welded with a metal limiting plate (13). The metal limiting plate (13) is horizontally provided with a sliding groove (14). Multiple U-shaped limiting blocks (12) are inserted into the sliding groove (14). The multiple U-shaped limiting blocks (12) all have their U-shaped openings facing upwards. The multiple U-shaped limiting blocks (12) can move left and right in the sliding groove (14).

9. The blade adjustment device for a straw crushing apparatus according to claim 8, characterized in that: Each of the U-shaped limiting blocks (12) has a fixed connecting bracket (16) inserted into its U-shaped opening at the top. The fixed connecting bracket (16) and the U-shaped limiting block (12) are fixedly connected by multiple screws. The top of the fixed connecting bracket (16) is welded with a top surface fixing plate (15), and the top surface fixing plate (15) is fixed to the corresponding fixed position of the straw crushing device by screws. The combination of the U-shaped limiting block (12), the metal limiting plate (13), the sliding groove (14), the top surface fixing plate (15) and the fixed connecting bracket (16) can prevent the prism blade holder (7) from rotating during adjustment and use.

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