Cutter fixing mechanism for plastic crushing device

Abstract

The invention relates to the technical field of plastic crushing, in particular to a cutter fixing mechanism for a plastic crushing device, a fixed cutter fixing component group is detachably mounted at the top of a lower cutter cavity of a crusher, and the fixed cutter fixing component group comprises a lower fixing assembly and an upper fixing assembly; the lower fixing assembly comprises a lower supporting plate support and a lower supporting plate, wherein the lower supporting plate support is fixedly connected to the inner wall of a lower cutter cavity of the pulverizer; mounting a bolt piece I; and the lower supporting plate piece is fixed on the lower supporting plate support through welding. The fixed cutter mounting plate is connected with the supporting plate piece through the bolts, common maintenance personnel can easily operate after being simply trained during disassembly and replacement, and compared with a traditional welding structure, the maintenance efficiency is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic crushing, in particular to a tool fixing mechanism for a plastic crushing device. Background Art

[0002] As a key equipment for plastic waste treatment, plastic crushing device is widely used in plastic recycling and resource reuse. Plastic crusher is usually composed of plastic crushing knife chamber, main shaft, moving knife and fixed knife. When the main shaft rotates at high speed, it drives the moving knife installed on it to rotate together, and the plastic is crushed through the shear cooperation between the moving knife and the fixed knife.

[0003] In the existing plastic crusher design, the fixed knife fixing plate in the knife chamber is usually fixed by welding. The fixed knife fixing plate is provided with a fixed knife fixing bolt and a fixed knife adjusting bolt. The fixed knife fixing bolt is mainly used to fix the fixed knife firmly on the fixing plate, while the fixed knife adjusting bolt is used to fine-tune the position of the fixed knife from the side, thereby adjusting the gap between the fixed knife and the moving knife. In this way, the cutting effect of the tool can be adjusted according to actual use requirements.

[0004] The current fixed blade fixing plate has the following problems in long-term use: The threaded holes on the fixed blade fixing plate corresponding to the positioning fixing bolts and the fixed blade adjusting bolts are subjected to long-term vibration and mechanical shock, and the friction between the threaded holes and the bolts gradually increases, resulting in wear or thread slippage of the threaded parts. The worn threaded holes cannot provide sufficient tightening force, and the bolts are prone to loosening, which may even cause the fixed blade to be loosely fixed, thereby affecting the cutting effect and increasing the risk of equipment failure. Although waste plastics are generally of low hardness, the alternating cutting action of the moving knife and the fixed knife will still exert continuous impact force on the fixed knife fixed plate. Long-term impact accumulation can easily cause local wear, cracks or deformation of the fixed plate. After the above two problems occur, since the fixed knife fixing plate is welded in the knife cavity, it cannot be replaced, resulting in inconvenience in replacement and repair. Summary of the invention

[0005] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a tool fixing mechanism for a plastic crushing device to solve the problem raised in the above-mentioned background technology that the fixing plate on which the fixed knife is currently installed cannot be replaced, making it inconvenient to replace and repair, affecting the cutting effect and increasing the risk of equipment failure.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tool fixing mechanism for a plastic crushing device comprises a lower knife cavity of a crusher, wherein: a fixed knife fixing component group is detachably installed on the top of the lower knife cavity of the crusher, and the fixed knife fixing component group comprises a lower fixing component and an upper fixing component; the lower fixing component comprises: a lower support plate support, which is fixedly connected to the inner wall of the lower knife cavity of the crusher; a mounting bolt member 1; a lower support plate member, which is fixed to the lower support plate support by welding; a lower fixed knife mounting plate, a fixing bolt hole 1 for fixing the lower fixed knife and a positioning bolt hole 1 for positioning the lower fixed knife are opened on the surface of the lower fixed knife, and the lower support plate member is connected to the lower support plate member through the mounting bolt member 1; a lower fixed flat key, which is connected to the lower fixed knife mounting plate by bolts and contacts the lower support plate member through a groove; the upper fixing component comprises: an upper support plate support, which is fixedly connected to the inner wall of the lower knife cavity of the crusher; a mounting bolt member 2; an upper support plate member, which is fixed to the upper support plate support by welding; an upper fixed knife mounting plate, a fixing bolt hole 1 for fixing the lower fixed knife and a positioning bolt hole 1 for positioning the lower fixed knife are opened on the surface of the lower fixed knife The fixing bolt hole 2 of the upper fixed knife and the positioning bolt hole 2 of the upper fixed knife are fixed, and are connected to the upper supporting plate through the mounting bolt part 2; the upper fixed flat key is connected to the upper fixed knife mounting plate through a bolt and contacts the upper supporting plate through a groove; a disassembly component group is provided at the bottom of the fixed knife fixing component group, and the disassembly component group is configured to perform disassembly and assembly operations on the mounting bolt part 1 and the mounting bolt part 2; the disassembly component group includes an L-shaped bracket, a first table plate, a second table plate, a third table plate and a table plate connecting member The connecting bolts are used to fix the L-shaped hanger, the first platen, the second platen and the third platen in a fixed manner. The L-shaped hanger and the first platen are provided with a clearance groove at a position corresponding to one end of the mounting bolt. Two groups of pinching handles and a clamping block are provided inside the L-shaped hanger. A spring is installed between the two groups of pinching handles. The pinching handle is in sliding contact with the L-shaped hanger through a sliding groove. The lower supporting plate member and the upper supporting plate member are provided with limiting grooves corresponding to the clamping block member and the L-shaped hanger. The clamping block member is in contact with the lower supporting plate member through the limiting groove.

[0007] Preferably, the top surface of the L-shaped bracket is provided with anti-slip grooves and forms a friction lock with the limiting groove, and the first platform is in contact with the L-shaped bracket.

[0008] Preferably, the disassembly component group also includes a movable sleeve, a spline shaft, a spline sleeve, a transmission gear 1, a transmission gear 2, an outer shaft and an adjusting arm, and the movable sleeve is provided with a hexagonal groove at a position corresponding to one end of the mounting bolt component, and the movable sleeve contacts with one end of the mounting bolt component through the hexagonal groove.

[0009] Preferably, the spline shaft is fixed on the moving sleeve through a through hole, the adjusting arm and one end of the moving sleeve are connected by a rotating shaft, the adjusting arm slidably contacts a guide rod, the guide rod is fixed between the second platen and the third platen, a spring is sleeved on the outside of the guide rod, and the spring is connected between the adjusting arm and the second platen.

[0010] Preferably, the internal sliding engagement of the spline sleeve is a movable sleeve, a portion of the outer portion of the spline sleeve is connected to the second platen via a bearing, another portion of the outer portion of the spline sleeve is fixedly connected to transmission gear one via a through hole, transmission gear one is meshed with transmission gear two, transmission gear two is connected to the third platen and the second platen via a bearing, and one end of the outer shaft is fixedly connected to transmission gear two.

[0011] Preferably, the outer shaft and the second transmission gear are on the same axial line, and a convex hexagonal end is provided at one end of the outer shaft away from the second transmission gear, and the convex hexagonal end is used to connect with the sleeve of the disassembly tool.

[0012] Preferably, the adjusting arm, the spline shaft and the movable sleeve form an adjusting structure that moves between the second platen and the third platen.

[0013] Preferably, a handle is installed at one end of the adjusting arm away from the movable sleeve, and an avoidance groove is provided on the adjusting arm corresponding to the table connecting bolt.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The fixed blade mounting plate is connected to the support plate by bolts. When disassembling and replacing, the fixed blade mounting plate can be easily removed from the support plate by unscrewing the bolts one by one. This process does not require complex equipment and professional skills. Ordinary maintenance personnel can complete the operation after simple training. The entire maintenance process is simple and efficient. Compared with the traditional welding structure, the maintenance efficiency has been significantly improved; 2. The disassembly component group is used in conjunction with an impact screwdriver. By utilizing its internal transmission structure, such as transmission gear 1, transmission gear 2, spline sleeve, spline shaft and movable sleeve, the power of the impact screwdriver can be efficiently transmitted to the mounting bolts, so that the mounting bolts can be rotated and removed in a short time, which greatly shortens the disassembly time and improves the overall disassembly efficiency. Moreover, it is not limited by a small space and does not need to be inserted into the lower knife cavity of the crusher to use the impact screwdriver. 3. The installation process of the disassembly component group is simple and quick. When installing the L-shaped bracket on the pallet, you only need to insert one side of it into the limit slot. The clamping block will automatically complete the clamping under the action of the spring to achieve the connection with the pallet. When disassembling, pinch the two sets of pinching handles to make the clamping block out of the limit slot and easily remove the L-shaped bracket. This convenient installation and disassembly method reduces the operation steps and time and improves the efficiency of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the lower knife cavity and the fixed knife fixing component assembly of the pulverizer of the present invention being partially exploded; Figure 3 It is a structural schematic diagram of a partial cross-section of the lower blade cavity and the fixed blade fixing component assembly of the pulverizer of the present invention; Figure 4 For the present invention Figure 3 The structural diagram at A in the middle; Figure 5 For the present invention Figure 3 Schematic diagram of the structure at B in the middle; Figure 6 It is a schematic structural diagram of the overall side view of the present invention; Figure 7 It is a structural schematic diagram of a disassembly component assembly and a portion of an installation bolt member of the present invention; Figure 8 It is a structural schematic diagram of a disassembly component assembly and a bottom portion of an installation bolt member of the present invention; Fig. 9 It is a structural schematic diagram of a disassembly component assembly and a top portion of an installation bolt member of the present invention; Fig.10 The structure diagram of the fixed blade fixing component group and the disassembly component group of the present invention is partially cut away Figure 1 ; Fig.11 For the present invention Fig.10 The structural diagram at C in the middle; Fig.12 The structure diagram of the fixed blade fixing component group and the disassembly component group of the present invention is partially cut away Figure 2 ; Fig.13 For the present invention Fig.12 The schematic diagram of the structure at D in the middle; Fig.14 It is a schematic diagram of the structure of the overall explosion of the disassembly component assembly of the present invention; Fig.15 It is a structural schematic diagram of the integrally disassembled component group when the adjustment arm of the present invention is attached to the third platform; Fig.16 It is a cross-sectional structural schematic diagram of the position of the lower fixed knife mounting plate of the present invention; Fig.17 It is a schematic cross-sectional structure diagram of the position of the upper fixed knife mounting plate of the present invention.

[0016] In the figure: 01, lower knife cavity of the crusher; 02, fixed knife fixing component group; 21, lower fixing assembly; 211, lower fixed knife mounting plate; 212, fixing bolt hole 1; 213, positioning bolt hole 1; 214, mounting bolt part 1; 215, lower support plate; 216, lower support plate support; 217, lower fixing flat key; 22, upper fixing assembly; 221, upper fixed knife mounting plate; 222, fixing bolt hole 2; 223, positioning bolt hole 2; 224, mounting bolt part 2 ; 225, upper support plate; 226, upper support plate support; 227, upper fixed flat key; 03, disassembly component group; 31, L-shaped bracket; 32, first table; 33, pinch handle; 34, clamping block; 35, limit groove; 36, second table; 37, third table; 38, table connecting bolt; 39, moving sleeve; 310, spline shaft; 311, spline sleeve; 312, transmission gear one; 313, transmission gear two; 314, outer shaft; 315, adjustment arm. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] An embodiment provided by the present invention: It includes a crusher lower knife chamber 01, wherein: Figure 1-Figure 5 A fixed knife fixing component group 02 is detachably mounted on the top of the lower knife cavity 01 of the crusher, and the fixed knife fixing component group 02 includes a lower fixing component 21 and an upper fixing component 22; The lower fixing assembly 21 includes: a lower support plate support 216, which is fixedly connected to the inner wall of the lower knife cavity 01 of the crusher; a mounting bolt member 214; a lower support plate member 215, which is fixed to the lower support plate support 216 by welding; a lower fixed knife mounting plate 211, on the surface of which a fixing bolt hole 212 for fixing the lower fixed knife and a positioning bolt hole 213 for positioning the lower fixed knife are opened, and is connected to the lower support plate member 215 through the mounting bolt member 214; a lower fixed flat key 217, which is connected to the lower fixed knife mounting plate 211 by bolts and contacts the lower support plate member 215 through a groove; It should be noted that the lower support plate support 216 is welded with Q355B steel to provide basic rigidity. After the lower fixed flat key 217 is installed on the lower fixed knife mounting plate 211 with bolts, when the lower fixed knife mounting plate 211 is installed on the lower support plate 215, the lower fixed flat key 217 enters the groove of the lower support plate 215, which facilitates the positioning of the lower fixed knife mounting plate 211 during installation. In addition, a group of bolts is also provided on the side of the lower fixed knife mounting plate 211 away from the mounting bolt member 214, and this group of bolts is also connected to the lower fixed knife mounting plate 211 and the lower support plate 2 15, but the difference from the mounting bolt member 214 is that the bolt head is located at the top of the lower fixed knife mounting plate 211, rather than inside the lower supporting plate member 215, so the direction is exactly opposite to that of the mounting bolt member 214. This group of bolts is only provided on the lower fixed knife mounting plate 211. This is mainly because most of the cut plastics will accumulate at the position of the lower fixing component 21 under the influence of gravity and be cut. Therefore, the impact force on the lower fixing component 21 is greater than that on the upper fixing component 22, so an additional group of bolts is provided to improve the overall structural stability; The upper fixing assembly 22 includes: an upper support plate support 226, which is fixedly connected to the inner wall of the lower knife cavity 01 of the crusher; a second mounting bolt member 224; an upper support plate member 225, which is fixed to the upper support plate support 226 by welding; an upper fixed knife mounting plate 221, on the surface of which a second fixing bolt hole 222 for fixing the upper fixed knife and a second positioning bolt hole 223 for positioning the upper fixed knife are opened, and is connected to the upper support plate member 225 by the second mounting bolt member 224; an upper fixed flat key 227, which is connected to the upper fixed knife mounting plate 221 by bolts, and contacts the upper support plate member 225 through a groove; It should be noted that the pre-tightening force of the mounting bolt member 1 214 and the mounting bolt member 224 is controlled within the range of 20-30 kN to balance the rigidity and vibration resistance. After the upper fixed flat key 227 is mounted on the upper fixed knife mounting plate 221 with bolts, when the upper fixed knife mounting plate 221 is mounted on the upper supporting plate member 225, the upper fixed flat key 227 enters the groove of the upper supporting plate member 225, which facilitates the positioning of the upper fixed knife mounting plate 221 during installation, and the lower fixed flat key 217 and the upper fixed flat key 227 absorb the vibration when the overall device is working. The effect of vibration is that the fixed flat key itself has a certain elastic deformation ability. When subjected to vibration impact, the flat key will undergo a slight elastic deformation, and absorb the vibration energy through this deformation, just like a spring stores energy when compressed by an external force, thereby weakening the transmission of vibration between the entire fixed knife fixing component group 02 and the lower knife cavity 01 of the crusher, effectively reducing the vibration amplitude of the entire equipment, improving the stability of equipment operation, reducing the problems of loose parts and increased wear caused by excessive vibration, and extending the service life of the equipment; refer to Figure 6-Figure 13A disassembly component group 03 is provided at the bottom of the fixed knife fixing component group 02, and the disassembly component group 03 is configured to perform disassembly and assembly operations on the installation bolt component 1 214 and the installation bolt component 224.

[0019] The disassembly component group 03 includes an L-shaped hanger 31, a first table plate 32, a second table plate 36, a third table plate 37 and a table plate connecting bolt 38. The table plate connecting bolt 38 fixes the L-shaped hanger 31, the first table plate 32, the second table plate 36 and the third table plate 37. The L-shaped hanger 31 and the first table plate 32 are provided with a clearance groove corresponding to the end of the mounting bolt member 214. Two groups of pinching handles 33 and a clamping block member 34 are provided inside the L-shaped hanger 31. A spring is installed between the two groups of pinching handles 33. The pinching handles 33 are in sliding contact with the L-shaped hanger 31 through the sliding groove. The lower support plate member 215 and the upper support plate member 225 are provided with a limiting groove 35 corresponding to the clamping block member 34 and the L-shaped hanger 31. The clamping block member 34 is in contact with the lower support plate member 215 through the limiting groove 35.

[0020] refer to Fig.11 and Fig.13 The top surface of the L-shaped bracket 31 is provided with anti-slip grooves and forms a friction lock with the limiting groove 35 , and the first platen 32 is in contact with the L-shaped bracket 31 .

[0021] It should be noted that the anti-slip pattern is a cross diamond knurling (tooth depth 0.3-0.5mm), which, together with the stepped edge of the limit groove 35, can limit the lateral displacement within ±0.2mm, ensuring the positioning stability during the disassembly process.

[0022] refer to Figure 6-Figure 15 The disassembly component group 03 also includes a movable sleeve 39, a spline shaft 310, a spline sleeve 311, a transmission gear 1 312, a transmission gear 2 313, an outer shaft 314 and an adjusting arm 315. The movable sleeve 39 is provided with a hexagonal groove corresponding to the end position of the mounting bolt component 214, and the movable sleeve 39 is in contact with the end of the mounting bolt component 214 through the hexagonal groove.

[0023] The spline shaft 310 is fixed on the movable sleeve 39 through a through hole, the adjusting arm 315 and one end of the movable sleeve 39 are connected by a rotating shaft, the adjusting arm 315 slides in contact with the guide rod, the guide rod is fixed between the second platen 36 and the third platen 37, a spring is sleeved on the outside of the guide rod, and the spring is connected between the adjusting arm 315 and the second platen 36.

[0024] The internal sliding meshing moving sleeve 39 of the spline sleeve 311, a part of the outer part of the spline sleeve 311 is connected to the second table 36 through a bearing, and another part of the outer part of the spline sleeve 311 is fixedly connected to the transmission gear 1 312 through a through hole, and the transmission gear 1 312 is meshed with the transmission gear 2 313, and the transmission gear 2 313 is connected to the third table 37 and the second table 36 through a bearing, and one end of the outer shaft 314 is fixedly connected to the transmission gear 2 313, and the outer shaft 314 and the transmission gear 2 313 are on the same axis, and the end of the outer shaft 314 away from the transmission gear 2 313 is provided with a convex hexagonal end, which is used to connect with the sleeve of the disassembly tool. The adjustment arm 315, the spline shaft 310 and the moving sleeve 39 form an adjustment structure that moves between the second table 36 and the third table 37. The end of the adjustment arm 315 away from the moving sleeve 39 is equipped with a handle. The adjustment arm 315 is provided with an avoidance groove corresponding to the table connecting bolt 38.

[0025] Working principle: The designed fixed knife fixing component group 02 includes a lower fixing component 21 and an upper fixing component 22. The lower fixing component 21 and the upper fixing component 22 are respectively used to install the lower fixed knife and the upper fixed knife. When the lower fixed knife mounting plate 211 or the upper fixed knife mounting plate 221 is used for a long time and the problems mentioned in the background technology occur and need to be replaced, the mounting bolt member 214 connected between the lower fixed knife mounting plate 211 and the lower supporting plate member 215 is directly disassembled, and then the lower fixed knife mounting plate 211 can be removed from the lower supporting plate member 215, and then a new lower fixed knife mounting plate 211 is replaced and installed on the lower supporting plate member 215 again by the mounting bolt member 214 to complete the overall replacement operation. This operation design can effectively solve the problems mentioned in the background technology. When disassembling the mounting bolt member 214, since the end of the mounting bolt member 214 is located at the bottom of the lower support plate member 215 and is blocked and restricted by the lower support plate support 216, the mounting bolt member 214 can only be moved slightly when disassembling it using a wrench, and the wrench can only be rotated 30°-50°. It is necessary to repeatedly perform the "loosen-reset-loosen again" cycle operation, and the overall disassembly efficiency is low. If a labor-saving and efficient impact screwdriver is used, it is also impossible to disassemble it directly because the end is facing downward and located in a relatively narrow position. Therefore, the disassembly component group 03 is designed. When it is necessary to disassemble the mounting bolt member 214, for example: First, install the L-shaped hanger 31 on the lower support plate 215. During installation, you only need to insert one side of the L-shaped hanger 31 into the limiting groove 35. The block 34 will be squeezed and compressed back into the L-shaped hanger 31 during the insertion process. The springs between the two sets of pinch handles 33 will accumulate force and contract. When one side of the L-shaped hanger 31 is completely inserted into the limiting groove 35, the springs will release the accumulated force to push the block 34 out. The L-shaped hanger is completed by the block 34 being stuck in the limiting groove 35. The L-shaped bracket 31 is connected to the lower support plate 215. The L-shaped bracket 31 can avoid displacement on the lower support plate 215 through the texture on the upper surface. When inserting the lower support plate 215 on one side of the L-shaped bracket 31, it is necessary to push the adjustment arm 315 to fit the third plate 37. The movement of the adjustment arm 315 will drive the spline shaft 310 and the movable sleeve 39 to move downward to avoid the installation bolt 214. The spring between the adjustment arm 315 and the second plate 36 will accumulate force and stretch (such as Fig.15 As shown in FIG. 1 ), when the L-shaped bracket 31 is completely installed in the limiting groove 35, the push on the adjusting arm 315 is released, and the spring between the adjusting arm 315 and the second plate 36 releases the stored force to pull the adjusting arm 315 back to its original position, and the movable sleeve 39 connected thereto moves upward and sleeves on the end of the mounting bolt member 214 (as shown in FIG. 1 ). Figure 7 shown); Then, an impact screwdriver is used to put the sleeve of the impact screwdriver on the outer shaft 314, and the outer shaft 314 is driven to rotate by starting the impact screwdriver. The rotation of the outer shaft 314 drives the transmission gear 2 313, the transmission gear 1 312, the spline sleeve 311, the spline shaft 310 and the movable sleeve 39 to rotate, thereby driving the installation bolt 1 214 to rotate. Under the action of rotation, the installation bolt 1 214 will rotate and move out from the threaded holes of the lower fixed knife mounting plate 211 and the lower supporting plate 215, and the end of the installation bolt 1 214 will eventually contact the adjustment arm 315 to complete the removal of the installation bolt 1 214. After the mounting bolt 214 is disassembled, the two sets of pinch handles 33 are pinched together to allow the spring between the two sets of pinch handles 33 to contract, and the blocking member 34 will be out of contact with the limiting groove 35, so that the L-shaped hanger 31 can be removed from the lower support plate 215. After the mounting bolt 214 is taken out, the disassembly component group 03 is installed on it according to the position of the next mounting bolt 214 that needs to be disassembled, and the impact screwdriver can be continued to be used to quickly disassemble the mounting bolt 214.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A tool fixing mechanism for a plastic crushing device, comprising a lower tool cavity (01) of a crusher, characterized in that: A fixed knife fixing component group (02) is detachably mounted on the top of the lower knife cavity (01) of the pulverizer, and the fixed knife fixing component group (02) comprises a lower fixing component (21) and an upper fixing component (22); The lower fixing assembly (21) comprises: a lower supporting plate support (216) fixedly connected to the inner wall of the lower blade cavity (01) of the pulverizer; a mounting bolt member (214); a lower supporting plate member (215) fixed to the lower supporting plate support (216) by welding; a lower fixed blade mounting plate (211) having a fixing bolt hole (212) for fixing the lower fixed blade and a positioning bolt hole (213) for positioning the lower fixed blade on its surface, and connected to the lower supporting plate member (215) via the mounting bolt member (214); a lower fixing flat key (217) connected to the lower fixed blade mounting plate (211) via bolts, and contacting the lower supporting plate member (215) via a groove; The upper fixing assembly (22) comprises: an upper support plate support (226) fixedly connected to the inner wall of the lower blade cavity (01) of the pulverizer; a second mounting bolt member (224); an upper support plate member (225) fixed to the upper support plate support (226) by welding; an upper fixed blade mounting plate (221) having a second fixing bolt hole (222) for fixing the upper fixed blade and a second positioning bolt hole (223) for positioning the upper fixed blade on its surface, and connected to the upper support plate member (225) via the second mounting bolt member (224); an upper fixing flat key (227) connected to the upper fixed blade mounting plate (221) via bolts and contacting the upper support plate member (225) via a groove; A disassembly component group (03) is provided at the bottom of the fixed knife fixing component group (02), and the disassembly component group (03) is configured to perform disassembly and assembly operations on the lower fixing component (21) and the upper fixing component (22); The disassembly component group (03) comprises an L-shaped hanger (31), a first table plate (32), a second table plate (36), a third table plate (37) and table plate connecting bolts (38), wherein the table plate connecting bolts (38) are fixedly connected to the L-shaped hanger (31), the first table plate (32), the second table plate (36) and the third table plate (37), and the L-shaped hanger (31) and the first table plate (32) are provided with a clearance groove at a position corresponding to the end of the mounting bolt member (214). Two groups of gripping handles (33) and a clamping block (34) are arranged inside the L-shaped hanger (31), a spring is installed between the two groups of gripping handles (33), the gripping handles (33) are in sliding contact with the L-shaped hanger (31) through a sliding groove, the lower supporting plate (215) and the upper supporting plate (225) are provided with limiting grooves (35) corresponding to the clamping block (34) and the L-shaped hanger (31), and the clamping block (34) is in contact with the lower supporting plate (215) through the limiting groove (35).

2. The tool fixing mechanism for a plastic crushing device according to claim 1, characterized in that: The top surface of the L-shaped hanger (31) is provided with anti-slip grooves and forms a friction lock with the limiting groove (35), and the first platform (32) is in contact with the L-shaped hanger (31).

3. The tool fixing mechanism for a plastic crushing device according to claim 2, characterized in that: The disassembly component group (03) further comprises a movable sleeve (39), a spline shaft (310), a spline sleeve (311), a transmission gear 1 (312), a transmission gear 2 (313), an outer shaft (314) and an adjustment arm (315); the movable sleeve (39) is provided with a hexagonal groove at a position corresponding to the end of the mounting bolt member 1 (214), and the movable sleeve (39) is in contact with the end of the mounting bolt member 1 (214) through the hexagonal groove.

4. The tool fixing mechanism for a plastic crushing device according to claim 3, characterized in that: The spline shaft (310) is fixed to the movable sleeve (39) via a through hole; the adjusting arm (315) and one end of the movable sleeve (39) are connected via a rotating shaft; the adjusting arm (315) slidably contacts a guide rod; the guide rod is fixed between the second table (36) and the third table (37); a spring is sleeved on the outside of the guide rod, and the spring is connected between the adjusting arm (315) and the second table (36).

5. The tool fixing mechanism for a plastic crushing device according to claim 4, characterized in that: The spline sleeve (311) is internally slidably engaged with a movable sleeve (39), an external portion of the spline sleeve (311) is connected to a second table (36) via a bearing, another external portion of the spline sleeve (311) is fixedly connected to a transmission gear 1 (312) via a through hole, the transmission gear 1 (312) is meshed with a transmission gear 2 (313), the transmission gear 2 (313) is connected to a third table (37) and a second table (36) via a bearing, and one end of the outer shaft (314) is fixedly connected to the transmission gear 2 (313).

6. The tool fixing mechanism for a plastic crushing device according to claim 5, characterized in that: The outer shaft (314) and the second transmission gear (313) are located on the same axis, and a convex hexagonal end is provided at one end of the outer shaft (314) away from the second transmission gear (313), and the convex hexagonal end is used to connect with the sleeve of a disassembly tool.

7. The tool fixing mechanism for a plastic crushing device according to claim 6, characterized in that: The adjusting arm (315), the spline shaft (310) and the movable sleeve (39) form an adjusting structure that moves between the second platen (36) and the third platen (37).

8. The tool fixing mechanism for a plastic crushing device according to claim 7, characterized in that: A handle is installed at one end of the adjustment arm (315) away from the movable sleeve (39), and an avoidance groove is provided on the adjustment arm (315) corresponding to the table plate connecting bolt (38).

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