A grinding system

Abstract

The utility model discloses a grinding system, including a grinding bracket, wherein a grinding chamber is arranged in the grinding bracket, wherein a grinding assembly and a powder sweeping element are arranged in the grinding chamber, wherein a driving assembly for driving the grinding assembly to operate is arranged on the grinding bracket, and an inclined powder discharge channel is arranged on the side wall of the grinding bracket, wherein one end of the inclined powder discharge channel extends into the grinding chamber and is connected to the bottom surface of the grinding chamber, and the inclined powder discharge channel is gradually inclined downward from one end close to the grinding chamber toward one end away from the grinding chamber. The inclined powder discharge channel arranged in an inclined manner can realize that when the powder sweeping element moves the powder to one end of the inclined powder discharge channel close to the bottom surface of the grinding chamber, the powder directly falls into the inclined powder discharge channel, and under the effect of the inclination, the powder is quickly output to the next station, so as to improve the powder discharge efficiency and reduce the powder residue.

Description

Technical Field

[0001] The utility model relates to a grinding system. Background Art

[0002] Prior art, such as Chinese utility model patent document with publication number CN209966136U, discloses a grinding device for a coffee machine, including a bean grinding support, and a bean box, a coffee powder docking box, a drive assembly, a gearbox assembly, and a conical knife assembly arranged on the bean grinding support, wherein the drive assembly and the conical knife assembly are respectively connected to the gearbox assembly for driving each other, and the bean grinding support is further provided with a bean grinding wheel assembly, and an angle adjustment assembly for adjusting the upper and lower positions of the bean grinding wheel assembly and the conical knife assembly; the gearbox assembly and the conical knife assembly are respectively coaxially arranged with the bean grinding wheel assembly, and a rotating mating piece is provided between the angle adjustment assembly and the bean grinding support, and the two are rotatably connected to each other through the rotating mating piece.

[0003] Please refer to the drawings in the prior art. Figure 7 The technical problem of the prior art is that the powder lowering channel connected to the grinding chamber is a transverse channel, which is perpendicular to the axis of the inner cutter head. This transversely arranged powder lowering channel will cause the powder sent out by the powder sweeping element to be unable to be quickly output to the powder lowering pipe, and a large amount of powder will remain in the powder lowering channel. Therefore, the prior art needs to be further improved to solve the problem of powder residue. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a grinding system that can reduce powder residue.

[0005] A grinding system designed for this purpose includes a grinding bracket, a grinding chamber is arranged in the grinding bracket, a grinding assembly and a powder sweeping element are arranged in the grinding chamber, a driving assembly for driving the grinding assembly to operate is arranged on the grinding bracket, an inclined powder lowering channel is arranged on the side wall of the grinding bracket, one end of the inclined powder lowering channel extends into the grinding chamber and is connected to the bottom surface of the grinding chamber, and the inclined powder lowering channel is arranged to be gradually inclined downward from one end close to the grinding chamber to one end away from the grinding chamber.

[0006] Preferably, an annular conical surface is provided on the inner bottom surface of the grinding chamber, the annular conical surface is gradually inclined downward from the inside to the outside, and one end of the inclined powder discharge channel is connected to the annular conical surface.

[0007] Preferably, the driving assembly comprises a gear ring fixedly mounted on the grinding bracket, a planetary wheel carrier is rotatably arranged in the gear ring, a plurality of planetary gears are arranged in the planetary wheel carrier along its circumference array, each of the planetary gears is meshed with the gear ring, a transmission shaft is fixedly arranged on the planetary wheel carrier, the transmission shaft extends upward into the grinding chamber and is transmission-connected with the grinding assembly, a first transmission element is rotatably arranged on the grinding bracket, a sun gear is arranged on the first transmission element, the sun gear is inserted into the planetary wheel carrier and is respectively meshed with each of the planetary gears;

[0008] A driving motor is installed on the grinding bracket, a second transmission element is installed on the motor shaft of the driving motor, and the second transmission element is transmission-connected with the first transmission element.

[0009] Preferably, the second transmission element and the first transmission element are provided with a synchronous belt for mutual transmission;

[0010] The grinding bracket is integrated with a transmission configuration cavity, a transmission shaft hole is provided between the transmission configuration cavity and the grinding cavity, the driving assembly is provided in the transmission configuration cavity, and the transmission shaft passes through the transmission shaft hole and extends into the grinding cavity;

[0011] The transmission configuration cavity is open at the lower end, a cover plate is installed at the lower end of the transmission configuration cavity, a fixed shaft is installed on the cover plate, the gear ring is fixedly installed on the cover plate, and the first transmission element is rotatably arranged on the fixed shaft;

[0012] A partition plate is arranged between the planetary wheel carrier and the inner top surface of the transmission configuration cavity.

[0013] Preferably, the transmission shaft and the planetary wheel carrier are integrally formed by injection molding.

[0014] Preferably, a convex ring is provided on the inner bottom surface of the grinding cavity outside the transmission shaft hole, a bearing cavity is formed inside the convex ring, a bearing is provided inside the bearing cavity, and the transmission shaft is fixed inside the inner ring of the bearing;

[0015] The powder sweeping element is provided with a matching ring extending downwards, the matching ring is located outside the convex ring, and a wool loop is arranged between the matching ring and the convex ring.

[0016] Preferably, the grinding assembly comprises an adjustment bracket rotatably arranged on the grinding bracket, the grinding bracket is provided with a cutter head bracket which can move up and down relative to the grinding bracket, an outer cutter head is installed on the cutter head bracket, an inner cutter head is arranged inside the outer cutter head, a plurality of inner thread grooves are arranged on the inner wall of the adjustment bracket, an outer thread protrusion matching the thread groove is arranged on the cutter head bracket, and the outer thread protrusion is movably arranged in the inner thread groove;

[0017] The grinding bracket is provided with a longitudinal guide groove, and the external thread protrusion is movably arranged in the longitudinal guide groove;

[0018] The inner cutter head is fixedly mounted on the transmission shaft.

[0019] Preferably, the cutter head support is located in the grinding chamber;

[0020] A sealing component is installed on the bottom surface of the cutter head bracket, the outer side wall of the sealing component is in contact with the inner side wall of the grinding chamber, and the inner side wall of the sealing component is in contact with the outer side wall of the outer cutter head.

[0021] Preferably, the powder sweeping element includes a powder sweeping cone seat, which is a cone with a small upper part and a large lower part. The powder sweeping cone seat forms a powder guiding slope toward the side wall of the inclined lower powder channel. The powder sweeping cone seat is provided with a plurality of powder sweeping blades along its circumferential array on the side wall of the inclined lower powder channel. The powder sweeping blades have a powder removing surface that is an arc surface. The powder sweeping element is transmission-connected to the driving assembly.

[0022] Preferably, the grinding bracket is provided with a powder lowering pipe connected to the inclined powder lowering channel, and the powder lowering pipe is provided with a plasma generator capable of releasing plasma into the interior of the powder lowering pipe.

[0023] Compared with the prior art, the utility model has an inclined powder-discharging channel on the side wall of the grinding bracket, one end of which extends into the grinding chamber and connects with the bottom surface of the grinding chamber, and the inclined powder-discharging channel is gradually inclined downward from one end close to the grinding chamber to one end away from the grinding chamber. The inclined powder-discharging channel can be set up so that when the powder sweeping element moves the powder to one end of the inclined powder-discharging channel close to the bottom surface of the grinding chamber, the powder directly falls into the inclined powder-discharging channel, and under the effect of the inclination, the powder is quickly output to the next station, so as to improve the powder-discharging efficiency and reduce the powder residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0025] Figure 2 This is one of the cross-sectional structural schematic diagrams of the utility model;

[0026] Figure 3 This is the second schematic diagram of the cross-sectional structure of the utility model;

[0027] Figure 4 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0028] Figure 5 This is a schematic diagram of a grinding bracket from a top view;

[0029] Figure 6 is a schematic diagram of the cross-sectional structure of the grinding bracket;

[0030] Figure 7 This is one of the schematic diagrams of the decomposed structure of the utility model;

[0031] Figure 8 This is the second schematic diagram of the decomposition structure of the utility model;

[0032] Fig. 9 It is a schematic diagram of the exploded cross-sectional structure of the utility model;

[0033] Fig.10 This is one of the planar structural diagrams of the powder sweeping element;

[0034] Fig.11 This is the second schematic diagram of the planar structure of the powder sweeping element. DETAILED DESCRIPTION

[0035] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0036] See also Figure 1-Figure 11 A grinding system includes a grinding support 10, wherein a grinding chamber 100 is provided in the grinding support 10, wherein a grinding assembly 20 and a powder sweeping element 40 are provided in the grinding chamber 100, wherein a driving assembly 30 for driving the grinding assembly 20 is provided on the grinding support 10, and an inclined powder discharge channel 110 is provided on the side wall of the grinding support 10, wherein one end of the inclined powder discharge channel 110 extends into the grinding chamber 100 and is connected to the bottom surface of the grinding chamber 100, and the inclined powder discharge channel 110 is gradually inclined downward from one end close to the grinding chamber 100 to one end away from the grinding chamber 100. In this embodiment, the inclined powder discharge channel can be set so that when the powder sweeping element moves the powder to one end of the inclined powder discharge channel close to the bottom surface of the grinding chamber, the powder directly falls into the inclined powder discharge channel, and under the action of the inclination, the powder is quickly output to the next station, so as to improve the powder discharge efficiency and reduce the powder residue.

[0037] See also Figure 5 and Figure 6The inner bottom surface of the grinding chamber 100 is provided with an annular conical surface 101, which is gradually inclined downward from the inside to the outside, and one end of the inclined powder discharge channel 110 is connected to the annular conical surface 101. The setting of the annular conical surface 101 can better convey the powder to the inclined powder discharge channel 110, so as to improve the powder discharge efficiency and reduce the residual powder.

[0038] See also Figure 2 and Fig. 9 The driving assembly 30 includes a ring gear 330 fixedly mounted on the grinding bracket 10, a planetary wheel carrier 340 is rotatably arranged in the ring gear 330, a plurality of planetary gears 350 are arranged in the planetary wheel carrier 340 along its circumference array, each of the planetary gears 350 is meshed with the ring gear 330, a transmission shaft 341 is fixedly arranged on the planetary wheel carrier 340, the transmission shaft 341 extends upward into the grinding chamber 100 and is in transmission connection with the grinding assembly 20, a first transmission element 310 is rotatably arranged on the grinding bracket 10, a sun gear 320 is arranged on the first transmission element 310, the sun gear 320 is inserted into the planetary wheel carrier 340 and is respectively meshed with each of the planetary gears 350;

[0039] The grinding bracket 10 is provided with a driving motor 360 , and a second transmission element 370 is installed on the motor shaft of the driving motor 360 . The second transmission element 370 is in transmission connection with the first transmission element 310 .

[0040] The working principle of the driving assembly 30 is that the driving motor 360 is electrically started to drive the second transmission element 370 to rotate, and then drives the first transmission element 310 to rotate under the transmission action, and then drives each planetary gear 350 to rotate through the sun gear 320. When the planetary gear 350 rotates, since the ring gear 330 is fixed, the entire planetary wheel carrier 340 rotates relative to the ring gear 330, thereby driving the transmission shaft 341 located on the planetary wheel carrier 340 to rotate, thereby driving the grinding assembly 20 to operate.

[0041] In the present invention, the planetary wheel carrier 340 is composed of an upper wheel carrier 343 and a lower wheel carrier 342, and the upper wheel carrier 343 and the lower wheel carrier 342 are connected by bolts or buckles.

[0042] Furthermore, the transmission shaft 341 is a metal shaft, and the transmission shaft 341 is injection molded with the upper wheel frame 343 by using a rubber-encapsulated injection molding method. The one-piece molding can make the assembly gap between the planetary wheel frame 340 and the transmission shaft 341 disappear, which can improve the stability of the transmission and reduce the shaking caused by the assembly.

[0043] See also Figure 2The second transmission element 370 and the first transmission element 310 are provided with a synchronous belt 380 for mutual transmission. Of course, the second transmission element 370 and the first transmission element 310 can also be transmitted by existing transmission methods such as gear transmission.

[0044] See also Figure 2 and Fig. 9 The grinding bracket 10 is integrated with a transmission configuration cavity 140, a transmission shaft hole 130 is provided between the transmission configuration cavity 140 and the grinding cavity 100, the driving assembly 30 is arranged in the transmission configuration cavity 140, and the transmission shaft 341 passes through the transmission shaft hole 130 and extends into the grinding cavity 100; the lower end of the transmission configuration cavity 140 is open, and a cover plate 150 is installed at the lower end of the transmission configuration cavity 140, a fixed shaft 300 is installed on the cover plate 150, the ring gear 330 is fixedly installed on the cover plate 150, and the first transmission element 310 is rotatably arranged on the fixed shaft 300; a spacer plate 160 is provided between the planetary wheel carrier 340 and the inner top surface of the transmission configuration cavity 140.

[0045] Furthermore, the partition plate 160 , the gear ring 330 , the first transmission element 310 and the cover plate 150 are arranged in sequence from top to bottom.

[0046] See also Figure 2 A convex ring 120 is provided on the inner bottom surface of the grinding chamber 100 outside the transmission shaft hole 130, and a bearing chamber 121 is formed in the convex ring 120. A bearing is provided in the bearing chamber 121, and the transmission shaft 341 is fixed in the inner ring of the bearing; a mating ring 400 is extended downwardly from the powder sweeping element 40, and the mating ring 400 is located on the outside of the convex ring 120, and a wool loop 60 is assembled between the mating ring 400 and the convex ring 120.

[0047] Furthermore, the annular conical surface 101 is arranged on the outer side of the wool loop 60 .

[0048] Furthermore, a columnar connecting portion 344 is disposed on the planetary wheel carrier 340 , and the columnar connecting portion 344 is rotatably disposed in the transmission shaft hole 130 . The transmission shaft 341 is connected to the columnar connecting portion 344 .

[0049] See also Figures 6 to 8The grinding assembly 20 includes an adjustment bracket 230 rotatably arranged on the grinding bracket 10, and a cutter head bracket 240 that can move up and down relative to the grinding bracket 10 is arranged on the grinding bracket 10, an outer cutter head 210 is installed on the cutter head bracket 240, and an inner cutter head 220 is arranged inside the outer cutter head 210, and a plurality of internal thread grooves are arranged on the inner wall of the adjustment bracket 230, and an external thread protrusion 241 matching the thread groove is arranged on the cutter head bracket 240, and the external thread protrusion 241 is movably arranged in the internal thread groove; a longitudinal guide groove 102 is arranged on the grinding bracket 10, and the external thread protrusion 241 is movably arranged in the longitudinal guide groove 102.

[0050] Under the cooperation constraint of the external thread protrusion 241 and the longitudinal guide groove 102 , the cutter head support 240 can only move up and down relative to the grinding support 10 , and cannot rotate relative to the grinding support 10 .

[0051] When the adjustment bracket 230 rotates relative to the grinding bracket 10, under the action of the thread groove, it can drive the external thread protrusion 241 to move upward or downward, thereby driving the tool head bracket 240 and the external tool head 210 to move upward or downward to adjust the gap between the external tool head 210 and the internal tool head 220.

[0052] Furthermore, three thread grooves are provided, and three external thread protrusions 241 are provided.

[0053] See also Figure 1 A limit bracket 80 is provided on the grinding bracket 10, a limit space 800 is provided on the limit bracket 80, and a limit convex block 231 is provided on the adjustment bracket 230 in the limit space 800. The limit convex block 231 is limited by the limit space 800, and can restrict the rotation range of the adjustment bracket 230, thereby preventing the adjustment bracket 230 from rotating all the time and causing the cutter head bracket 240 to separate upward from the grinding bracket 10.

[0054] See also Figure 2 and Figure 4 The cutter head bracket 240 is located in the grinding chamber 100; a sealing assembly 70 is installed on the bottom surface of the cutter head bracket 240, and the outer wall of the sealing assembly 70 is in contact with the inner wall of the grinding chamber 100, and the inner wall of the sealing assembly 70 is in contact with the outer wall of the outer cutter head 210. The function of the sealing assembly 70 is to prevent the powder from being lifted upward, and to prevent the powder from being lifted upward from the gap between the cutter head bracket 240 and the inner wall of the grinding chamber 100 and the gap between the cutter head bracket 240 and the outer cutter head 210.

[0055] Furthermore, the sealing assembly 70 includes a sealing ring 710 and a pressure ring 720 . The sealing ring 710 is disposed between the bottom surface of the tool head bracket 240 and the pressure ring 720 . The pressure ring 720 is threadedly connected to the tool head bracket 240 through a plurality of bolts 730 .

[0056] See also Fig.10 and Fig.11 The powder sweeping element 40 includes a powder sweeping cone seat 410, which is a cone with a small top and a large bottom. The powder sweeping cone seat 410 forms a powder guiding slope 420 toward the side wall of the inclined lower powder channel 110. A plurality of powder sweeping blades 450 are arranged along the circumference of the side wall of the powder sweeping cone seat 410 toward the inclined lower powder channel 110. The powder sweeping surface 451 of the powder sweeping blade 450 is an arc surface. The powder sweeping element 40 is connected to the driving assembly 30 in a transmission manner.

[0057] See also Fig.11 When the powder sweeping element 40 rotates to sweep the powder, the powder sweeping element 40 rotates in the positive direction, and the powder sweeping surface 451 of the powder sweeping blade 450 can guide the powder from the inside to the outside to improve the powder discharge efficiency and reduce the powder residue.

[0058] At the same time, the powder guiding slope 420 formed by the powder sweeping cone seat 410 can realize the conveying of powder to the outside of the powder sweeping cone seat 410 , so that the powder can be quickly moved by the powder sweeping blades 450 to be conveyed to the inclined powder lower channel 110 .

[0059] Furthermore, a bean grinding gap 200 is formed between the outer cutter head 210 and the inner cutter head 220, and the lower part of the bean grinding gap 200 is located directly above the powder guiding slope 420. In this arrangement, the powder output through the bean grinding gap 200 directly falls on the powder guiding slope 420, and then is transported to the outside of the powder sweeping cone seat 410 through the powder guiding slope 420.

[0060] Furthermore, a plurality of guide posts 440 are provided on the powder sweeping cone seat 410 , and a plugging hole for plugging with the guide posts 440 is provided on the lower end surface of the inner cutter head 220 .

[0061] Furthermore, the powder sweeping cone seat 410 is provided with a sleeve 430 extending upward, and the powder sweeping cone seat 410 and the sleeve 430 are provided with an axial hole 431 penetrating the two, and the transmission shaft 341 is penetrated in the axial hole 431, so that when the transmission shaft 341 rotates, the powder sweeping cone seat 410 is driven to rotate. The setting of the sleeve 430 can increase the contact area with the transmission shaft 341, so as to enhance the stability of the powder sweeping element 40 when rotating.

[0062] Furthermore, the inner cutter head 220 is plugged into the sleeve 430, and the lower end face of the inner cutter head 220 abuts against the upper end face of the powder sweeping cone seat 410. A locking nut 370 is threadedly connected to the upper end of the transmission shaft 341, and the lower end face of the locking nut 370 fits against the upper end face of the inner cutter head 220 to achieve compression locking.

[0063] Furthermore, a gasket is provided between the tightening nut 370 and the inner cutter head 220 to prevent loosening.

[0064] See also Figure 1 The grinding bracket 10 is provided with a powder lowering pipe 50 connected to the inclined powder lowering channel 110, and the powder lowering pipe 50 is provided with a plasma generator 510 capable of releasing plasma into the powder lowering pipe 50. The plasma generator 510 generates a high-voltage electrostatic field into the powder lowering pipe 50, which can effectively eliminate the static charge carried by the ground coffee powder.

[0065] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0067] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A grinding system, comprising a grinding support (10), wherein a grinding chamber (100) is arranged in the grinding support (10), a grinding assembly (20) and a powder sweeping element (40) are arranged in the grinding chamber (100), and a driving assembly (30) for driving the grinding assembly (20) to operate is arranged on the grinding support (10), characterized in that: An inclined powder lowering channel (110) is provided on the side wall of the grinding bracket (10), one end of the inclined powder lowering channel (110) extends into the grinding chamber (100) and is connected to the bottom surface of the grinding chamber (100), and the inclined powder lowering channel (110) is gradually inclined downward from an end close to the grinding chamber (100) to an end away from the grinding chamber (100).

2. A grinding system according to claim 1, characterized in that: An annular conical surface (101) is provided on the inner bottom surface of the grinding chamber (100), and the annular conical surface (101) is gradually inclined downward from the inside to the outside, and one end of the inclined powder discharge channel (110) is connected to the annular conical surface (101).

3. A grinding system according to claim 1, characterized in that: The driving assembly (30) comprises a ring gear (330) fixedly mounted on the grinding bracket (10), a planetary wheel carrier (340) being rotatably arranged inside the ring gear (330), a plurality of planetary gears (350) being arranged in an array along the circumference of the planetary wheel carrier (340), each of the planetary gears (350) being meshed with the ring gear (330), a transmission shaft (341) being fixedly arranged on the planetary wheel carrier (340), the transmission shaft (341) extending upward into the grinding chamber (100) and being transmission-connected with the grinding assembly (20), a first transmission element (310) being rotatably arranged on the grinding bracket (10), a sun gear (320) being arranged on the first transmission element (310), the sun gear (320) being inserted into the planetary wheel carrier (340) and respectively meshing with each of the planetary gears (350); A driving motor (360) is mounted on the grinding bracket (10); a second transmission element (370) is mounted on the motor shaft of the driving motor (360); and the second transmission element (370) is transmission-connected to the first transmission element (310).

4. A grinding system according to claim 3, characterized in that: The second transmission element (370) and the first transmission element (310) are sleeved with a synchronous belt (380) for mutual transmission; The grinding bracket (10) is integrated with a transmission configuration cavity (140), a transmission shaft hole (130) is provided between the transmission configuration cavity (140) and the grinding cavity (100), the driving assembly (30) is arranged in the transmission configuration cavity (140), and the transmission shaft (341) passes through the transmission shaft hole (130) and extends into the grinding cavity (100); The transmission configuration cavity (140) is open at the lower end, a cover plate (150) is installed at the lower end of the transmission configuration cavity (140), a fixed shaft (300) is installed on the cover plate (150), the gear ring (330) is fixedly installed on the cover plate (150), and the first transmission element (310) is rotatably arranged on the fixed shaft (300); A partition plate (160) is provided between the planetary wheel carrier (340) and the inner top surface of the transmission configuration cavity (140).

5. A grinding system according to claim 3 or 4, characterized in that: The transmission shaft (341) and the planetary wheel carrier (340) are integrally formed by injection molding.

6. A grinding system according to claim 4, characterized in that: A convex ring (120) is provided on the inner bottom surface of the grinding cavity (100) outside the transmission shaft hole (130), a bearing cavity (121) is formed in the convex ring (120), a bearing is provided in the bearing cavity (121), and the transmission shaft (341) is fixed in the inner ring of the bearing; The powder sweeping element (40) is provided with a matching ring (400) extending downwards. The matching ring (400) is located outside the convex ring (120). A wool loop (60) is arranged between the matching ring (400) and the convex ring (120).

7. A grinding system according to claim 4, characterized in that: The grinding assembly (20) comprises an adjustment bracket (230) rotatably arranged on the grinding bracket (10); the grinding bracket (10) is provided with a cutter head bracket (240) which can move up and down relative to the grinding bracket (10); an outer cutter head (210) is installed on the cutter head bracket (240); an inner cutter head (220) is arranged inside the outer cutter head (210); a plurality of inner thread grooves are arranged on the inner wall of the adjustment bracket (230); an outer thread protrusion (241) matching the thread groove is arranged on the cutter head bracket (240); and the outer thread protrusion (241) is movably arranged in the inner thread groove; The grinding bracket (10) is provided with a longitudinal guide groove (102), and the external thread protrusion (241) is movably arranged in the longitudinal guide groove (102); The inner cutter head (220) is fixedly mounted on the transmission shaft (341).

8. A grinding system according to claim 7, characterized in that: The cutter head support (240) is located in the grinding chamber (100); A sealing assembly (70) is installed on the bottom surface of the cutter head bracket (240), the outer wall of the sealing assembly (70) is in contact with the inner wall of the grinding chamber (100), and the inner wall of the sealing assembly (70) is in contact with the outer wall of the external cutter head (210).

9. A grinding system according to claim 1, characterized in that: The powder sweeping element (40) comprises a powder sweeping cone seat (410), the powder sweeping cone seat (410) is a cone with a small upper part and a large lower part, and a powder guiding slope (420) is formed on the side wall of the powder sweeping cone seat (410) facing the inclined lower powder channel (110). A plurality of powder sweeping blades (450) are arranged in an array along the circumference of the side wall of the powder sweeping cone seat (410) facing the inclined lower powder channel (110), and the powder removing surface (452) of the powder sweeping blade (450) is an arc surface. The powder sweeping element (40) is drivingly connected to the driving assembly (30).

10. A grinding system according to claim 1, characterized in that: The grinding bracket (10) is provided with a powder lowering pipe (50) interconnected with the inclined powder lowering channel (110), and the powder lowering pipe (50) is provided with a plasma generator (510) capable of releasing plasma into the interior of the powder lowering pipe (50).

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