Tool fixing mechanism for plastic crushing device

Abstract

The present invention relates to the technical field of plastic crushing, specifically a tool fixing mechanism for a plastic crushing device. A fixed cutter fixing component group is detachably installed on the top of the lower cutter cavity of the crusher. The fixed cutter fixing component group includes a lower fixing component and an upper fixing component; the lower fixing component includes: a lower support plate support, which is fixedly connected to the inner wall of the lower cutter cavity of the crusher; a mounting bolt member I; and a lower support plate member, which is fixedly welded to the lower support plate support. In the present invention, the fixed cutter mounting plate and the support plate member are connected by bolts. When disassembling and replacing, ordinary maintenance personnel can easily operate after simple training, significantly improving the maintenance efficiency compared with the traditional welding structure.

Description

Technical Field

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

[0002] As a key device for plastic waste treatment, plastic crushing devices are widely used in the process of plastic recycling and resource reuse. A plastic crusher usually consists of a plastic crushing knife cavity, a main shaft, moving knives, fixed knives, etc. When the main shaft rotates at a high speed, the moving knives installed on it rotate together. Through the shearing cooperation between the moving knives and the fixed knives, the plastic is crushed.

[0003] In the design of existing plastic crushers, the fixed knife fixing plate in the knife cavity is usually fixed by welding. The fixed knife fixing plate is provided with fixed knife fixing bolts and fixed knife adjusting bolts. The fixed knife fixing bolts are mainly used to firmly fix the fixed knife on the fixing plate, and the fixed knife adjusting bolts are used to laterally fine-tune the position of the fixed knife, 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] At present, the existing fixed knife fixing plate has the following problems during long-term use:

[0005] For the threaded holes opened on the fixed knife fixing plate corresponding to the positioning fixing bolts and the fixed knife adjusting bolts, under the action of long-term vibration and mechanical shock, the friction force between the threaded holes and the bolts gradually increases, resulting in wear or thread slipping of the threaded part. The worn threaded holes cannot provide sufficient fastening force, and the bolts are prone to loosening, and may even cause the fixed knife to be not firmly fixed, thereby affecting the cutting effect and increasing the risk of equipment failure;

[0006] Although waste plastics generally have a low hardness, the alternating cutting action of the moving knives and the fixed knives on the plastic still exerts continuous impact force on the fixed knife fixing plate. Long-term impact accumulation is likely to cause local wear, cracks or deformation of the fixing plate;

[0007] After the above two problems occur, since the fixed knife fixing plate is welded in the knife cavity and cannot be replaced, it is inconvenient to replace and repair. Summary of the Invention

[0008] In order to overcome the above technical problems, the purpose of the present invention is to provide a tool fixing mechanism for a plastic crushing device, so as to solve the problems mentioned in the above background art that the fixing plate for installing the fixed knife cannot be replaced at present, resulting in inconvenient replacement and repair, affecting the cutting effect and increasing the risk of equipment failure.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 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;

[0019] 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.

[0020] 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

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2Exploded structural schematic diagram of the lower knife cavity and the fixed knife fixing component group of the present invention;

[0023] Figure 3 Partial sectional structural schematic diagram of the lower knife cavity and the fixed knife fixing component group of the present invention;

[0024] Figure 4 Of the present invention Figure 3 Structural schematic diagram at position A;

[0025] Figure 5 Of the present invention Figure 3 Structural schematic diagram at position B;

[0026] Figure 6 Overall side view structural schematic diagram of the present invention;

[0027] Figure 7 Structural schematic diagram of a part of the disassembly component group and the installation bolt parts of the present invention;

[0028] Figure 8 Structural schematic diagram of the bottom part of the disassembly component group and the installation bolt parts of the present invention;

[0029] Figure 9 Structural schematic diagram of the top part of the disassembly component group and the installation bolt parts of the present invention;

[0030] Figure 10 Partial sectional structural schematic diagram of the fixed knife fixing component group and the disassembly component group of the present invention Figure 1 ;

[0031] Figure 11 Of the present invention Figure 10 Structural schematic diagram at position C;

[0032] Figure 12 Partial sectional structural schematic diagram of the fixed knife fixing component group and the disassembly component group of the present invention Figure 2 ;

[0033] Figure 13 Of the present invention Figure 12 Structural schematic diagram at position D;

[0034] Figure 14 Exploded structural schematic diagram of the overall disassembly component group of the present invention;

[0035] Figure 15 Structural schematic diagram of the overall disassembly component group when the adjusting arm is attached to the third platen of the present invention;

[0036] Figure 16 Partial sectional structural schematic diagram of the position of the lower knife mounting plate of the present invention;

[0037] Figure 17 Schematic cross-sectional structure diagram of the position of the upper fixed knife mounting plate of the present invention.

[0038] In the figure: 01, lower knife cavity of the crusher; 02, fixed knife fixing component group; 21, lower fixing component; 211, lower fixed knife mounting plate; 212, first fixing bolt hole; 213, first positioning bolt hole; 214, first mounting bolt part; 215, lower support plate part; 216, lower support plate support; 217, lower fixed flat key; 22, upper fixing component; 221, upper fixed knife mounting plate; 222, second fixing bolt hole; 223, second positioning bolt hole; 224, second mounting bolt part; 225, upper support plate part; 226, upper support plate support; 227, upper fixed flat key; 03, disassembly component group; 31, L-shaped hanger; 32, first platen; 33, pinch handle; 34, block part; 35, limit groove; 36, second platen; 37, third platen; 38, platen connection bolt; 39, moving sleeve; 310, spline shaft; 311, spline sleeve; 312, first transmission gear; 313, second transmission gear; 314, outer shaft part; 315, adjusting arm. Specific embodiments

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] An embodiment provided by the present invention:

[0041] Including the lower knife cavity 01 of the crusher, where: Refer to Figures 1 - 5 , a fixed knife fixing component group 02 is detachably installed 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;

[0042] The lower fixing component 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 first mounting bolt part 214; a lower support plate part 215, which is fixedly welded to the lower support plate support 216; a lower fixed knife mounting plate 211, on the surface of which there are a first fixing bolt hole 212 for fixing the lower fixed knife and a first positioning bolt hole 213 for positioning the lower fixed knife, and is connected to the lower support plate part 215 through the first mounting bolt part 214; a lower fixed flat key 217, which is connected to the lower fixed knife mounting plate 211 through bolts and contacts the lower support plate part 215 through a groove;

[0043] It should be noted that the lower pallet support 216 is welded with Q355B steel to provide basic rigidity. After the lower fixing 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 pallet part 215, the lower fixing flat key 217 enters the groove of the lower pallet part 215 to facilitate the positioning of the lower fixed knife mounting plate 211 during installation. Moreover, a set of bolts is provided on the side of the lower fixed knife mounting plate 211 away from the mounting bolt part 214. This set of bolts is also connected between the lower fixed knife mounting plate 211 and the lower pallet part 215, but the difference from the mounting bolt part 214 is that the bolt head is located on the top of the lower fixed knife mounting plate 211 rather than inside the lower pallet part 215, so the direction is exactly opposite to that of the mounting bolt part 214. This set of bolts is only provided on the lower fixed knife mounting plate 211 mainly because most of the plastic to be cut will accumulate at the position of the lower fixing component 21 under the influence of gravity during cutting, so the impact force received by the lower fixing component 21 is greater than that of the upper fixing component 22. Therefore, an additional set of bolts is provided to improve the overall structural stability;

[0044] The upper fixing component 22 includes: an upper pallet support 226, which is fixedly connected to the inner wall of the lower knife cavity 01 of the crusher; a mounting bolt part 224; an upper pallet part 225, which is fixedly welded to the upper pallet support 226; an upper fixed knife mounting plate 221, on the surface of which there are a fixing bolt hole two 222 for fixing the upper fixed knife and a positioning bolt hole two 223 for positioning the upper fixed knife, and it is connected to the upper pallet part 225 through the mounting bolt part 224; an upper fixing flat key 227, which is connected to the upper fixed knife mounting plate 221 with bolts and contacts the upper pallet part 225 through a groove;

[0045] It should be noted that the pre-tightening force of the mounting bolt part 214 and the mounting bolt part 224 is controlled within the range of 20 - 30 kN to balance rigidity and anti-vibration performance. After the upper fixing flat key 227 is installed on the upper fixed knife mounting plate 221 with bolts, when the upper fixed knife mounting plate 221 is installed on the upper pallet part 225, the upper fixing flat key 227 enters the groove of the upper pallet part 225 to facilitate the positioning of the upper fixed knife mounting plate 221 during installation. Moreover, the lower fixing flat key 217 and the upper fixing flat key 227 play a role in absorbing vibration during the operation of the overall device. Specifically, the flat key itself has a certain elastic deformation ability. When subjected to vibration impact, the flat key will undergo a small elastic deformation, and the vibration energy is absorbed through this deformation, just like a spring stores energy when compressed by an external force, 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 overall vibration amplitude of the device, improving the stability of the device operation, reducing problems such as loosening and increased wear of parts that may be caused by excessive vibration, and extending the service life of the device;

[0046] ReferenceFigures 6 - 13 , 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 installation bolt part one 214 and the installation bolt part two 224.

[0047] The disassembly component group 03 includes an L-shaped hanger 31, a first platen 32, a second platen 36, a third platen 37 and a platen connection bolt 38. The platen connection bolt 38 fixedly connects the L-shaped hanger 31, the first platen 32, the second platen 36 and the third platen 37. The L-shaped hanger 31 and the first platen 32 are provided with relief grooves corresponding to the positions of the ends of the installation bolt part one 214. Two groups of pinch handles 33 and a latch member 34 are arranged inside the L-shaped hanger 31. A spring is installed between the two groups of pinch handles 33. The pinch handles 33 are in sliding contact with the L-shaped hanger 31 through chutes. The lower support plate part 215 and the upper support plate part 225 are provided with limit grooves 35 corresponding to the latch member 34 and the L-shaped hanger 31. The latch member 34 contacts the lower support plate part 215 through the limit groove 35.

[0048] Reference Figure 11 and Figure 13 , the top surface of the L-shaped hanger 31 is provided with anti-slip lines and forms a friction lock with the limit groove 35, and the first platen 32 contacts the L-shaped hanger 31.

[0049] It should be noted that the anti-slip lines are cross-rhombus knurling (tooth depth 0.3 - 0.5 mm). Combined with the stepped edge of the limit groove 35, the lateral displacement can be limited within ±0.2 mm to ensure the positioning stability during the disassembly process.

[0050] Reference Figures 6 - 15 , the disassembly component group 03 further includes a moving sleeve 39, a spline shaft 310, a spline sleeve 311, a transmission gear one 312, a transmission gear two 313, an outer shaft part 314 and an adjusting arm 315. The moving sleeve 39 is provided with a hexagonal groove corresponding to the position of the end of the installation bolt part one 214, and the moving sleeve 39 contacts the end of the installation bolt part one 214 through the hexagonal groove.

[0051] The spline shaft 310 is fixed on the moving sleeve 39 through a through hole. One end of the adjusting arm 315 and the moving sleeve 39 are connected by a rotating shaft. The adjusting arm 315 is in sliding contact with a guide rod. The guide rod is fixed between the second platen 36 and the third platen 37. A spring is sleeved outside the guide rod, and the spring is connected between the adjusting arm 315 and the second platen 36.

[0052] The inner part of the spline sleeve 311 is slidably engaged with the moving sleeve 39. One part of the outside of the spline sleeve 311 is connected to the second platen 36 through a bearing, and the other part of the outside of the spline sleeve 311 is fixedly connected to the first transmission gear 312 through a through hole. The first transmission gear 312 meshes with the second transmission gear 313. The second transmission gear 313 is connected to the third platen 37 and the second platen 36 through bearings. One end of the outer shaft member 314 is fixedly connected to the second transmission gear 313. The outer shaft member 314 and the second transmission gear 313 are on the same axis. The end of the outer shaft member 314 away from the second transmission gear 313 is provided with a convex hexagonal end, and the convex hexagonal end is used to connect with the sleeve of the disassembly tool. The adjusting arm 315, the spline shaft 310 and the moving sleeve 39 form an adjusting structure that moves between the second platen 36 and the third platen 37. A handle is installed at the end of the adjusting arm 315 away from the moving sleeve 39. The adjusting arm 315 is provided with an avoidance groove corresponding to the platen connecting bolt 38.

[0053] Working principle:

[0054] 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 needs to be replaced due to the problems mentioned in the background technology after long-term use, directly remove the mounting bolt 214 connecting between the lower fixed knife mounting plate 211 and the lower support plate 215. Subsequently, the lower fixed knife mounting plate 211 can be removed from the lower support plate 215, and then a new lower fixed knife mounting plate 211 is replaced and installed on the lower support plate 215 again through the mounting bolt 214 to complete the overall replacement operation. This design of the operation can effectively solve the problems proposed in the background technology;

[0055] When disassembling the mounting bolt 214, since the end part of the mounting bolt 214 is located at the bottom of the lower support plate 215 and is blocked and restricted by the lower support 216, when using a wrench to disassemble the mounting bolt 214, it can only move slightly, and the wrench can only rotate within a limited range of 30° - 50°. It is necessary to repeatedly perform the cycle operation of "loosen - reset - loosen again", and the overall disassembly efficiency is low. And if a labor-saving and efficient impact screwdriver is used, it is also impossible to directly disassemble because the end is downward and located in a relatively narrow position. Therefore, the designed disassembly component group 03, when it is necessary to disassemble, for example, the mounting bolt 214:

[0056] 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 Figure 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);

[0057] 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.

[0058] 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.

[0059] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Thus, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A tool fixing mechanism for a plastic crushing device, including a lower cutter cavity (01) of a crusher, characterized in that: A fixed cutter fixing component group (02) is detachably installed on the top of the lower cutter cavity (01) of the crusher, and the fixed cutter fixing component group (02) includes a lower fixing component (21) and an upper fixing component (22); The lower fixing component (21) includes: a lower support plate support (216), which is fixedly connected to the inner wall of the lower cutter cavity (01) of the crusher; a mounting bolt part one (214); a lower support plate part (215), which is fixedly welded to the lower support plate support (216); a lower fixed cutter mounting plate (211), on the surface of which there are a fixing bolt hole one (212) for fixing the lower fixed cutter and a positioning bolt hole one (213) for positioning the lower fixed cutter, and it is connected to the lower support plate part (215) through the mounting bolt part one (214); a lower fixed key (217), which is connected to the lower fixed cutter mounting plate (211) through bolts and contacts the lower support plate part (215) through a groove; The upper fixing component (22) includes: an upper support plate support (226), which is fixedly connected to the inner wall of the lower cutter cavity (01) of the crusher; a mounting bolt part two (224); an upper support plate part (225), which is fixedly welded to the upper support plate support (226); an upper fixed cutter mounting plate (221), on the surface of which there are a fixing bolt hole two (222) for fixing the upper fixed cutter and a positioning bolt hole two (223) for positioning the upper fixed cutter, and it is connected to the upper support plate part (225) through the mounting bolt part two (224); an upper fixed key (227), which is connected to the upper fixed cutter mounting plate (221) through bolts and contacts the upper support plate part (225) through a groove; A disassembly component group (03) is provided at the bottom of the fixed cutter 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) includes an L-shaped hanging bracket (31), a first platen (32), a second platen (36), a third platen (37) and a platen connecting bolt (38). The platen connecting bolt (38) fixedly connects the L-shaped hanging bracket (31), the first platen (32), the second platen (36) and the third platen (37). The L-shaped hanging bracket (31) and the first platen (32) are provided with a relief groove at the position corresponding to the end of the mounting bolt part one (214). Two groups of pinch handles (33) and a block part (34) are arranged inside the L-shaped hanging bracket (31). A spring is installed between the two groups of pinch handles (33). The pinch handles (33) are in sliding contact with the L-shaped hanging bracket (31) through a chute. The lower support plate part (215) and the upper support plate part (225) are provided with a limit groove (35) corresponding to the block part (34) and the L-shaped hanging bracket (31). The block part (34) contacts the lower support plate part (215) through the limit groove (35); The disassembly component group (03) further includes a movable sleeve (39), a spline shaft (310), a spline sleeve (311), a first transmission gear (312), a second transmission gear (313), an outer shaft member (314), and an adjusting arm (315). A hexagonal groove is provided at a position corresponding to the end of the first mounting bolt (214) on the movable sleeve (39), and the movable sleeve (39) contacts the end of the first mounting bolt (214) through the hexagonal groove; The spline shaft (310) is fixed on the movable sleeve (39) through a through hole. One end of the adjusting arm (315) and the movable sleeve (39) are connected by a rotating shaft. The adjusting arm (315) is in sliding contact with a guide rod. The guide rod is fixed between the second platen (36) and the third platen (37). A spring is sleeved outside the guide rod, and the spring is connected between the adjusting arm (315) and the second platen (36).

2. The tool fixing mechanism for the plastic crushing device according to claim 1, characterized in that: The top surface of the L-shaped hanger (31) is provided with anti-slip lines and forms frictional locking with the limiting groove (35). The first platen (32) contacts the L-shaped hanger (31).

3. The tool fixing mechanism for a plastic crushing device according to claim 1, characterized in that: The inside of the spline sleeve (311) is in sliding engagement with the movable sleeve (39). A part of the outside of the spline sleeve (311) is connected to the second platen (36) through a bearing. Another part of the outside of the spline sleeve (311) is fixedly connected to the first transmission gear (312) through a through hole. The first transmission gear (312) meshes with the second transmission gear (313). The second transmission gear (313) is connected to the third platen (37) and the second platen (36) through bearings. One end of the outer shaft member (314) is fixedly connected to the second transmission gear (313).

4. The tool fixing mechanism for the plastic crushing device according to claim 3, characterized in that: The outer shaft member (314) and the second transmission gear (313) are on the same axis line. A convex hexagonal end is provided at one end of the outer shaft member (314) away from the second transmission gear (313). The convex hexagonal end is used to connect with the sleeve of a disassembly tool.

5. The tool fixing mechanism for a plastic crushing device according to claim 4, 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).

6. The tool fixing mechanism for the plastic crushing device according to claim 5, characterized in that: A handle is installed at one end of the adjusting arm (315) away from the movable sleeve (39). The adjusting arm (315) is provided with an avoidance groove corresponding to the platen connection bolt (38).

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