A grinding and regenerating device for polymer materials

Abstract

The application relates to the technical field of plastic recycling, and discloses a grinding regeneration device for polymer materials, which comprises a grinding machine body arranged on a mounting seat, a driving shaft rotatably arranged at the center of the grinding machine body and located on the inner side of the grinding machine body, and a static grinding body which is detachably arranged on the grinding machine body, a dynamic grinding body which is detachably arranged on the driving shaft, and a clamping mechanism arranged between the static grinding body and the grinding machine body. The grinding regeneration device for the polymer materials is inserted into the limiting groove through the mounting rod to limit the radial movement of the mounting rod after insertion, the axial movement of the mounting rod is limited by the locking piece, the quick fixing and unlocking of the static grinding body are realized, the interlocking mechanism is triggered to act when the clamping mechanism is unlocked, the positioning connection between the dynamic grinding body and the driving shaft is automatically released, the dismounting operation of the static grinding body and the dynamic grinding body is synchronously linked, and the bolts do not need to be separately dismounted, so that the replacement process is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic recycling, in particular to a grinding regeneration device for polymer materials. BACKGROUND

[0002] Polymer materials include but are not limited to polyethylene (PE) / polypropylene (PP) products, epoxy resin (EP) / phenolic resin (PF) and other thermosetting polymers, and elastomer materials. In the process of polymer material processing, modification and recycling, plastic particle grinding regeneration is an important technical path for comprehensive utilization of solid waste. Through mechanical grinding and modification process, waste plastics (such as offcuts, discarded products) are converted into renewable powder or particle materials, realizing resource recycling and environmental pollution reduction.

[0003] At present, the most common method is to use a grinding machine to process plastic particles. Different grinding bodies are selected and installed according to product requirements. The shearing, impact and friction mechanical forces generated by the relative motion of the moving grinding body and the static grinding body can process waste plastics into particles of the required particle size. With the long-term and frequent impact and collision of the grinding body with the plastic particles, the surface will gradually wear out, and the grinding body must be replaced in time. However, most of the existing grinding machines fix and install the moving grinding body and the static grinding body by bolts and nuts, which makes it more troublesome and less convenient to disassemble and replace. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the present application provides a grinding regeneration device for polymer materials, which can effectively solve the problem that the grinding machine is fixed and installed by bolts and nuts in the prior art, which makes it more troublesome and less convenient to disassemble and replace.

[0005] To achieve the above purpose, the present application is realized by the following technical scheme:

[0006] The present application provides a grinding regeneration device for polymer materials, which comprises a grinding machine body provided on a mounting seat, a driving shaft rotatably provided at the center of the grinding machine body, and the driving shaft is located on the inner side of the grinding machine body, further comprising:

[0007] A static grinding body is detachably provided on the grinding machine body.

[0008] A moving grinding body is detachably provided on the driving shaft.

[0009] A clamping mechanism is provided between the static grinding body and the grinding machine body, the clamping mechanism comprises mounting rods symmetrically provided at the bottom of the static grinding body, the top of the grinding machine body is provided with a limiting slot matched with the mounting rods, and a locking piece is arranged in the limiting slot to limit the up and down movement of the mounting rods.

[0010] An interlocking mechanism is arranged between the movable grinding body and the clamping mechanism, and is used to automatically release the positioning connection between the movable grinding body and the driving shaft when the clamping mechanism is unlocked.

[0011] Further, the locking member comprises a positioning seat fixedly arranged in the limiting groove, and a wedge-shaped groove is formed in the inner wall of the positioning seat; an adjusting cylinder is arranged on the inner side of the positioning seat, and three positioning balls are arranged in the adjusting cylinder, and the outer wall of the positioning balls abuts against the inner wall of the wedge-shaped groove.

[0012] Further, the bottom end of the mounting rod is a tapered end, and a groove is formed in the middle part of the mounting rod; the diameter D1 of the mounting rod is greater than the minimum channel diameter D2 formed between the three positioning balls.

[0013] Further, the elastic member is connected between the outer wall of the adjusting cylinder and the inner wall of the limiting groove; a magnetic ring is arranged at the bottom of the adjusting cylinder; the strong magnetic rods are movably and penetratively arranged on the wall of the grinding machine body, and the strong magnetic rods are located at the bottom of the magnetic ring; the strong magnetic rods and the magnetic ring are magnetically attracted to each other.

[0014] When the strong magnetic rods are close to the magnetic ring, the elastic member is in a compressed state.

[0015] Further, the unlocking ring is slidably arranged on the outer side of the grinding machine body, and the two strong magnetic rods are arranged on the top of the unlocking ring; the return member is connected between the outer wall of the unlocking ring and the outer wall of the grinding machine body.

[0016] Further, the interlocking mechanism comprises a lock groove formed in the side wall of the driving shaft, and the inner side of the movable grinding body is provided with a positioning block.

[0017] When one end of the positioning block is inserted into the lock groove, the movable grinding body is in a locked state.

[0018] Further, the positioning block comprises a V-shaped elastic sheet connected to the inner wall of the movable grinding body, and a reverse triangular block connected to the end of the V-shaped elastic sheet away from the positioning block.

[0019] Further, the first toothed plate is arranged at the bottom of the positioning block, and the first toothed plate is slidably connected to the wall of the grinding machine body; the first toothed plate is in the shape of an inverted "L", and the end of the first toothed plate away from the positioning block is provided with a tooth surface.

[0020] Further, the second toothed plate is arranged at the bottom of the unlocking ring, and the second toothed plate is slidably connected to the wall of the grinding machine body; the transmission gears are rotatably arranged on the inner wall of the grinding machine body through the rotating shafts, and the transmission gears are engaged with the first toothed plate and the second toothed plate.

[0021] Compared with the prior art, the beneficial effects of the present application are as follows:

[0022] The application, by installing the rod and the limiting slot plug-in cooperation, limits the radial movement after the rod is inserted, and limits the axial movement of the rod by the locking piece, realizes the quick fixing and unlocking of the static grinding body; when the clamping mechanism is unlocked, the interlocking mechanism is triggered to act, automatically releases the positioning connection between the dynamic grinding body and the driving shaft, synchronously links the disassembly operation of the static grinding body and the dynamic grinding body, and does not need to separately disassemble the bolt, so that the replacement process is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0024] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the grinding machine body of the embodiment of the present application.

[0026] Figure 3 It is a schematic diagram of the structure of the static grinding body of the embodiment of the present application.

[0027] Figure 4 It is a schematic diagram of the structure of the embodiment of the present application Figure 2 enlarged structure of part A in the embodiment of the present application.

[0028] Figure 5 It is a schematic diagram of the cross-sectional structure of the positioning seat of the embodiment of the present application.

[0029] Figure 6 It is a schematic diagram of the structure of the adjusting cylinder of the embodiment of the present application.

[0030] Figure 7 It is a schematic diagram of the minimum channel formed between the three positioning balls of the embodiment of the present application.

[0031] Figure 8 It is a schematic diagram of the structure of the lock slot of the embodiment of the present application.

[0032] Figure 9 It is a schematic diagram of the structure of the positioning block of the embodiment of the present application.

[0033] Figure 10 It is a schematic diagram of the structure of the embodiment of the present application Figure 8 enlarged structure of part B in the embodiment of the present application.

[0034] The labels in the figure respectively represent: 100, grinder main body; 200, drive shaft; 300, static grinding body; 400, dynamic grinding body; 500, clamping mechanism; 501, mounting rod; 502, limiting groove; 503, positioning seat; 504, wedge-shaped groove; 505, adjusting cylinder; 506, positioning ball; 507, groove; 508, elastic piece; 509, magnetic ring; 510, strong magnetic rod; 511, unlocking ring; 512, reset piece; 600, interlocking mechanism; 601, locking groove; 602, positioning block; 6021, V-shaped elastic piece; 6022, inverted triangular block; 603, first toothed plate; 604, second toothed plate; 605, transmission gear. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0036] The present application will be further described below with reference to the embodiments.

[0037] Embodiment 1, refer to Figures 1-7 , the first embodiment of the present application provides a grinding regeneration device for polymer materials, which comprises a grinder main body 100 arranged on a mounting seat, and a drive shaft 200 rotatably arranged at the center of the grinder main body 100, and the drive shaft 200 is located inside the grinder main body 100, further comprising: a static grinding body 300, which is detachably arranged on the grinder main body 100, and the top of the static grinding body 300 is provided with a hopper (as shown in Figure 1 , Figure 2 are shown but not labeled); a dynamic grinding body 400, which is detachably arranged on the drive shaft 200.

[0038] Specifically, the mounting seat is further provided with a grinding motor (as shown in Figure 1 ), and the output shaft of the grinding motor is in transmission connection with the drive shaft 200 through a transmission assembly (such as a belt pulley set and a belt). This is a mature prior art, and therefore will not be described in more detail here.

[0039] At present, the most common is to process plastic particles by using a grinding machine, different grinding bodies are selected according to product requirements, and the particles of the required particle size are obtained by shearing, impact, friction and other mechanical forces generated by the relative motion of the moving grinding body 400 and the static grinding body 300. With the long-term and frequent impact and collision of the grinding body with the plastic particles, the surface will gradually wear out, and it is necessary to replace it in time. However, the existing grinding machines all fix and install the moving grinding body 400 and the static grinding body 300 by bolts and nuts, so that it is more troublesome and not convenient to disassemble and replace.

[0040] The application also includes a clamping mechanism 500 installed between the static grinding body 300 and the grinding machine body 100, the clamping mechanism 500 includes an installation rod 501 symmetrically welded or fixedly installed at the bottom of the static grinding body 300, the top of the grinding machine body 100 is provided with a limiting groove 502 matched with the installation rod 501, the top of the limiting groove 502 is provided with a through hole with the same diameter as the installation rod 501, which further limits the radial movement of the installation rod 501 after insertion, and the limiting groove 502 is provided with a locking piece for limiting the up-down movement of the installation rod 501.

[0041] The interlocking mechanism 600 is installed between the moving grinding body 400 and the clamping mechanism 500, and the interlocking mechanism 600 is used to automatically release the positioning connection between the moving grinding body 400 and the driving shaft 200 when the clamping mechanism 500 is unlocked.

[0042] Specifically, the installation rod 501 and the limiting groove 502 are inserted and matched to limit the radial movement of the installation rod 501 after insertion, and the locking piece limits the axial movement of the installation rod 501, so as to realize the quick fixing and unlocking of the static grinding body 300; when the clamping mechanism 500 is unlocked, the interlocking mechanism 600 is triggered to automatically release the positioning connection between the moving grinding body 400 and the driving shaft 200, so that the disassembly operation of the static grinding body 300 and the moving grinding body 400 is synchronized and linked, and the bolts do not need to be disassembled separately, thereby simplifying the replacement process.

[0043] Specifically, the locking piece can be fixed by rotating the eccentric wheel handle to press the installation rod 501 with the eccentric wheel, and the installation rod 501 can be disassembled by rotating the handle in the opposite direction to release the pressure on the installation rod 501. The interlocking mechanism 600 can be rigidly connected with the positioning pin of the moving grinding body 400 through the armature, the positioning pin is inserted into the clamping groove of the driving shaft 200, the locking state (such as the position of the eccentric wheel handle) of the clamping mechanism 500 is detected by the control circuit, the electromagnetic iron is turned on / off, the armature is attracted by the magnetic force generated by the electromagnetic iron, and the positioning pin is inserted into the clamping groove of the driving shaft 200 to fix the circumferential position of the moving grinding body 400.

[0044] Reference Figures 5-7The locking member comprises a positioning seat 503 fixedly installed in the limiting groove 502, and a wedge-shaped groove 504 is formed in the inner wall of the positioning seat 503. An adjusting cylinder 505 is arranged on the inner side of the positioning seat 503, and three positioning balls 506 are movably installed in the adjusting cylinder 505. A plurality of circular holes are formed in the wall of the adjusting cylinder 505, and the positioning balls 506 can extend out of or retract into the circular holes. The outer wall of the positioning ball 506 is in abutment with the inner wall of the wedge-shaped groove 504. The bottom end of the mounting rod 501 is a tapered end, and a groove 507 is formed in the middle portion of the mounting rod 501. The diameter D1 of the mounting rod 501 is greater than the minimum passage diameter D2 formed between the three positioning balls 506.

[0045] Specifically, as the mounting rod 501 is inserted into the limiting groove 502, the wall of the mounting rod 501 is in contact with the wall of the three positioning balls 506. Under the pushing action of the mounting rod 501, the positioning balls 506 drive the adjusting cylinder 505 to move to one side of the bottom end of the mounting rod 501, and the three positioning balls 506 simultaneously move radially outward. When the minimum passage diameter D2 formed between the three positioning balls 506 is equal to the diameter D1 of the mounting rod 501, the positioning balls 506 no longer move under the pushing action of the mounting rod 501. As the mounting rod 501 continues to move, the groove 507 moves to be embedded in the groove 507 between the three positioning balls 506, thereby limiting the axial movement of the mounting rod 501. At the same time, in cooperation with the wedge-shaped groove 504 on the inner side of the positioning seat 503, the mounting rod 501 is prevented from being pulled out of the limiting groove 502, thereby realizing the positioning between the static grinding body 300 and the grinding machine main body 100.

[0046] Specifically, when the static grinding body 300 attempts to move axially and is separated from the positioning seat 503 due to external factors (such as inversion or shaking), the adjusting cylinder 505 and the positioning balls 506 will move outward. Due to the change in the diameter of the wedge-shaped groove 504, the three positioning balls 506 will continuously be subjected to inward pressure. As the shaking intensifies, the tendency of the mounting rod 501 to move axially and be separated from the positioning seat 503 increases, and the extrusion force of the three positioning balls 506 on the outer wall of the mounting rod 501 also increases correspondingly. Finally, the mounting rod 501 is firmly locked in the positioning seat 503, thereby preventing it from being separated from the positioning seat 503.

[0047] With reference to Figure 4 and Figure 5 , the outer wall of the adjusting cylinder 505 is connected with the inner wall of the limiting groove 502 through an elastic member 508.

[0048] Specifically, the elastic member 508 is preferably a compression spring that can withstand axial compression. When the positioning balls 506 and the adjusting cylinder 505 move with the mounting rod 501, the elastic member 508 stores compression potential energy, so that the adjusting cylinder 505 always has a tendency to move outward (i.e., in the direction of the top end of the mounting rod 501), thereby increasing the extrusion force of the three positioning balls 506 on the outer wall of the mounting rod 501.

[0049] Embodiment 2, with reference toFigures 1-7 For the second embodiment of the present application, which is different from the first embodiment, due to the locking mechanism, the axial movement tendency of the mounting rod 501 will make it lock tighter and cannot be pulled out by itself. There are two ways to unlock the mounting rod 501: one is to directly move the three positioning balls 506 to the bottom end of the mounting rod 501, thereby expanding the diameter D2 of the channel between them; the other is to move the adjusting cylinder 505, thereby moving the three positioning balls 506 together to the bottom end of the mounting rod 501, thereby expanding the diameter D2 of the channel, and finally achieving unlocking, that is, the static grinding body 300 can be removed.

[0050] Referring to Figure 4 and Figure 5 , the bottom of the adjusting cylinder 505 is integrally formed with a magnetic ring 509, and a strong magnetic rod 510 is movably and penetratively arranged on the wall of the grinder body 100, and the strong magnetic rod 510 is located at the bottom of the magnetic ring 509, and the strong magnetic rod 510 is magnetically attracted to the magnetic ring 509; when the strong magnetic rod 510 is close to the magnetic ring 509, the elastic member 508 is in a compressed state.

[0051] Specifically, when unlocking is needed, the strong magnetic rod 510 is moved upward, the strong magnetic rod 510 attracts the magnetic ring 509 by magnetic force, compresses the elastic member 508, and moves the adjusting cylinder 505 to one side, thereby ensuring that the three positioning balls 506 expand radially synchronously, when D2 is greater than the diameter D1 of the mounting rod 501, the mounting rod 501 loses the restriction of the positioning ball 506, at this time the mounting rod 501 can be separated from the positioning seat 503, thereby realizing the quick disassembly of the static grinding body 300.

[0052] Referring to Figure 2 and Figure 4 , an unlocking ring 511 is slidably mounted on the outside of the grinder body 100, and the two strong magnetic rods 510 are fixedly installed on the top of the unlocking ring 511, and the outer wall of the unlocking ring 511 is connected with the grinder body 100 The outer wall of the grinder body 100 is connected with the reset member 512.

[0053] Specifically, the reset member 512 can be a spring or a metal spring piece; facilitating the pushing of the unlocking ring 511 to automatically reset after unlocking the static grinding body 300 and the dynamic grinding body 400; when accidental touch occurs, the unlocking ring 511 will not easily slide due to the damping effect of the reset member 512, only when the operator applies a stable external force greater than the damping threshold, the unlocking ring 511 can overcome the resistance to move the strong magnetic rod 510, and achieve unlocking. Effectively avoid the strong magnetic rod 510 accidentally separated from the magnetic ring 509 due to factors such as vibration and accidental touch, prevent the static grinding body 300 from being unexpectedly unlocked and falling off. The rest of the structure is the same as that of embodiment 1.

[0054] Embodiment 3, referring to Figures 1-10For the third embodiment of the present application, which is different from the second embodiment, the interlocking mechanism 600 comprises a lock slot 601 opened on the sidewall of the drive shaft 200, and the inner side of the movable grinding body 400 is provided with a positioning block 602; when one end of the positioning block 602 is inserted into the lock slot 601, the movable grinding body 400 is in a locked state.

[0055] Specifically, when the movable grinding body 400 is installed on the drive shaft 200, the positioning block 602 is aligned with and inserted into the lock slot 601, forming a mechanical connection; when the drive shaft 200 rotates, the circumferential extrusion force is generated between the slot wall of the lock slot 601 and the contact surface of the positioning block 602, forcing the positioning block 602 to rotate with the drive shaft 200, thereby driving the movable grinding body 400 to rotate synchronously, so that the mechanical forces such as shearing, impact, and friction generated by the relative movement between the movable grinding body 400 and the static grinding body 300 can process the waste plastic into particles of the desired particle size.

[0056] Referring to Figure 6 and Figure 8 , the bottom of the positioning block 602 is provided with a first toothed plate 603, and the first toothed plate 603 is in sliding connection with the wall body of the grinder main body 100; the first toothed plate 603 is in the shape of an inverted "L" as a whole, and the end of the first toothed plate 603 away from the positioning block 602 is provided with a toothed surface; the bottom of the unlocking ring 511 is provided with a second toothed plate 604, and the second toothed plate 604 is in sliding connection with the wall body of the grinder main body 100; the inner wall of the grinder main body 100 is provided with a transmission gear 605 through a rotating shaft, and the transmission gear 605 is in engagement with the first toothed plate 603 and the second toothed plate 604.

[0057] Specifically, when the unlocking ring 511 moves upward (at this time, the drive shaft 200 has stopped working), the second toothed plate 604 moves upward synchronously, and the first toothed plate 603 moves horizontally away from the outer side of the drive shaft 200 through the transmission gear 605, so that the first toothed plate 603 pulls the positioning block 602 out of the lock slot 601, thereby releasing the mechanical connection between the movable grinding body 400 and the drive shaft 200, so that the movable grinding body 400 can be taken out of the drive shaft 200, realizing the integrated design of the quick disassembly and assembly of the movable grinding body 400 and the static grinding body 300, which is especially suitable for the waste plastic processing scene that requires frequent replacement of grinding bodies, and significantly improves the operation efficiency and reliability of the device. The remaining structure is the same as that of embodiment 2.

[0058] Embodiment 4, referring to Figures 8-9 For the fourth embodiment of the present application, which is different from the second embodiment, the positioning block 602 comprises a V-shaped elastic sheet 6021 connected to the inner wall of the movable grinding body 400, and an inverted triangular block 6022 connected to the end of the V-shaped elastic sheet 6021 away from the positioning block 602.

[0059] Specifically, the V-shaped elastic sheet 6021 is made of spring steel or elastic alloy and has bidirectional elastic deformation capability, and can withstand extrusion or stretching force in the radial direction (perpendicular to the direction of the drive shaft 200).

[0060] Specifically, when the moving grinding body 400 approaches the drive shaft 200, the inclined surface of the inverted triangular block 6022 first contacts the edge of the drive shaft 200. During the insertion process, the inverted triangular block 6022 interferes with the lock groove 601 in the radial direction, and the V-shaped elastic sheet 6021 is compressed and deformed in the radial direction to avoid damage to the components caused by rigid collision. As the moving grinding body 400 continues to move downward for installation, after the inverted triangular block 6022 is completely embedded in the lock groove 601, the bottom edge thereof forms a surface contact with the inner wall of the lock groove 601, and the circumferential torque of the drive shaft 200 is transmitted to the moving grinding body 400 through the V-shaped elastic sheet 6021. The remaining structure is the same as that of the structure of the embodiment 3.

[0061] In combination with the embodiments 1-4, the working principle of the present application is as follows:

[0062] When unlocking is required, the unlocking ring 511 is pushed upward to synchronously move the strong magnetic rod 510 upward, the strong magnetic rod 510 attracts the magnetic ring 509 through magnetic force, compresses the elastic member 508, and moves the adjusting cylinder 505 toward the bottom end of the mounting rod 501, thereby ensuring that the three positioning balls 506 are synchronously expanded in the radial direction. When D2 is greater than the diameter D1 of the mounting rod 501, the mounting rod 501 loses the restriction of the positioning balls 506, and at this time, the mounting rod 501 can be separated from the positioning seat 503, thereby realizing the quick disassembly of the static grinding body 300. At the same time, the second toothed plate 604 is synchronously moved upward, the first toothed plate 603 is moved horizontally away from the outside of the drive shaft 200 through the transmission gear 605, the positioning block 602 is pulled out of the lock groove 601 by the first toothed plate 603, and the mechanical connection between the moving grinding body 400 and the drive shaft 200 is released, so that the moving grinding body 400 can be taken out of the drive shaft 200, thereby realizing the integrated design of the quick disassembly of the moving grinding body 400 and the static grinding body 300, which is especially suitable for the waste plastic processing scene that requires frequent replacement of grinding bodies, and significantly improves the operation efficiency and reliability of the device.

[0063] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A grinding regeneration device for polymer material, comprising a grinding machine body (100) arranged on a mounting seat, and a driving shaft (200) arranged in the center of the grinding machine body (100), and the driving shaft (200) is located in the inner side of the grinding machine body (100), characterized in that, Also include: Static grinding body (300), is detachably arranged on the grinding machine body (100); Dynamic grinding body (400), is detachably arranged on the driving shaft (200); Clamping mechanism (500) is arranged between static grinding body (300) and grinding machine body (100), the clamping mechanism (500) includes installation rod (501) arranged symmetrically at the bottom of static grinding body (300), the top of the grinding machine body (100) is provided with limiting groove (502) matched with installation rod (501), and locking member for limiting the up and down movement of installation rod (501) is arranged in limiting groove (502); Interlocking mechanism (600) is arranged between dynamic grinding body (400) and clamping mechanism (500), and the interlocking mechanism (600) is used for automatically releasing the positioning connection between dynamic grinding body (400) and driving shaft (200) when the clamping mechanism (500) is unlocked; Wherein, the locking member includes a positioning seat (503) fixedly arranged in the limiting groove (502), and a wedge-shaped groove (504) is formed in the inner wall of the positioning seat (503), an adjusting cylinder (505) is arranged on the inner side of the positioning seat (503), three positioning balls (506) are arranged in the adjusting cylinder (505), and the outer wall of the positioning ball (506) is in abutment with the inner wall of the wedge-shaped groove (504); the bottom end of the installation rod (501) is a tapered end, and a recess (507) is formed in the middle part of the installation rod (501), the diameter D1 of the installation rod (501) is greater than the minimum channel diameter D2 formed between the three positioning balls (506); the outer wall of the adjusting cylinder (505) is connected with the elastic member (508) between the inner wall of the limiting groove (502), the bottom of the adjusting cylinder (505) is provided with a magnetic ring (509), a strong magnetic rod (510) is movably arranged on the wall of the grinding machine body (100), and the strong magnetic rod (510) is located at the bottom of the magnetic ring (509), the strong magnetic rod (510) and the magnetic ring (509) are magnetically attracted; when the strong magnetic rod (510) is close to the magnetic ring (509), the elastic member (508) is in compression state; the interlocking mechanism (600) includes a lock groove (601) formed on the side wall of the driving shaft (200), and a positioning block (602) is arranged on the inner side of the dynamic grinding body (400); when one end of the positioning block (602) is inserted into the lock groove (601), the dynamic grinding body (400) is in locked state.

2. The device for the grinding regeneration of polymeric material according to claim 1, characterized in that, The outer side of the grinding machine body (100) is slidably provided with an unlocking ring (511), and the two strong magnetic rods (510) are arranged on the top of the unlocking ring (511), and the outer wall of the unlocking ring (511) is connected with the reset member (512) between the outer wall of the grinding machine body (100).

3. The device for the attrition regeneration of polymeric material according to claim 2, characterized in that, The positioning block (602) includes V-shaped elastic sheet (6021) connected with the inner wall of the dynamic grinding body (400), and inverted triangular block (6022) connected with the end of V-shaped elastic sheet (6021) away from the positioning block (602).

4. The device for the attrition regeneration of polymeric material according to claim 3, characterized in that, The bottom of the positioning block (602) is provided with a first toothed plate (603), and the first toothed plate (603) is in sliding connection with the wall of the grinder body (100); the first toothed plate (603) is in the shape of an inverted "L" as a whole, and the end of the first toothed plate (603) away from the positioning block (602) is provided with a tooth surface.

5. The device for the attrition regeneration of polymeric material according to claim 4, characterized in that, The bottom of the unlocking ring (511) is provided with a second toothed plate (604), and the second toothed plate (604) is in sliding connection with the wall of the grinder body (100); the inner wall of the grinder body (100) is provided with a transmission gear (605) through a rotating shaft, and the transmission gear (605) is in engagement with the first toothed plate (603) and the second toothed plate (604).

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