Metal powder grinding device

Abstract

The present invention relates to the technical field of metal powder processing, and specifically to a metal powder grinding device, including: this metal powder grinding device, through the design of a lower grinding disc, an outer grinding ring, an inner grinding disc and a combined grinding ring, the inner grinding disc is adapted to the size of the metal abrasive and the grinding gap is adjusted in a targeted manner to form grinding gaps of different heights, so that the metal abrasive is ground layer by layer with limited steps, which can ensure that the particles will enter the next grinding gap only after being ground to a certain particle size, thereby ensuring the homogeneity of the metal powder grinding manufacturing, especially for large-sized metal abrasives, they can be quickly ground and crushed at the initial stage through the adapted grinding gap, so as to facilitate the subsequent fine grinding position of the whole to be quickly carried out, thereby effectively accelerating the efficiency of crushing and fine grinding.

Description

Technical Field

[0001] The invention relates to the technical field of metal powder processing, in particular to a metal powder grinding device. Background Art

[0002] The grinding disc metal powder preparation technology currently faces two major challenges:

[0003] 1. Particle size control limitations: Many existing systems, such as those shown in CN202310092860.1, rely on extending the grinding time to refine the powder particle size. However, this method can easily cause large particles to block the suction hole during the grinding process, affecting the collection efficiency. In particular, when large particles of metal scraps are added, they may deviate from the grinding path due to centrifugal action, further exacerbating the blockage problem and reducing the grinding homogenization efficiency.

[0004] 2. Insufficient particle size control accuracy: Another design, such as the low-temperature brittle metal powder grinding device proposed in CN202211112691.5, although it adopts a multi-hammer grinding mechanism, is still insufficient in particle size control. The system mainly adjusts the grinding time by controlling the running time of the driving mechanism, thereby indirectly controlling the particle size. However, this method is difficult to accurately control the particle size distribution, affecting the quality of the final ground product. In view of the above problems, we aim to improve the grinding efficiency, optimize the particle size control, and improve the grinding quality. To this end, we propose a metal powder grinding device. Summary of the invention

[0005] A technical problem to be solved by the present application is to improve grinding efficiency, optimize particle size control, and improve grinding quality.

[0006] In order to solve the above technical problems, the embodiment of the present application provides a metal powder grinding device, including a shell, a middle support plate and a discharge port, and also includes

[0007] The lower grinding disc is rotatably mounted on the middle support plate by a rotating shaft, and a driving member is provided at the bottom of the middle support plate, and the driving member is connected to the lower grinding disc mounting rotating shaft to drive it to rotate continuously;

[0008] An outer grinding ring, an extension bracket is fixed on the top of the housing, and the outer grinding ring is fixed on the bottom end of the extension bracket and is located directly above the lower grinding disc;

[0009] An inner grinding disc is mounted on the inner side of the outer grinding ring, with its bottom end flush with the bottom end of the outer grinding ring, and a feed barrel is fixed through the inner grinding disc, and the feed barrel extends to the outside of the shell;

[0010] A combined grinding ring, arranged between the outer grinding ring and the inner grinding disc;

[0011] A synchronous self-locking driving component is installed on the shell and is connected to both the inner grinding disc and the combined grinding ring. The synchronous self-locking driving component is set to move to adjust the lifting of the inner grinding disc relative to the lower grinding disc, and the combined rings of the combined grinding ring are lifted and lowered simultaneously and asynchronously to form a stepped guiding structure between the inner grinding disc and the outer grinding ring.

[0012] In some embodiments, the bottom of the feeding barrel is in the shape of an inverted funnel, and the opening at the bottom gradually increases.

[0013] In some embodiments, the synchronous self-locking drive component includes a first self-locking linkage, a second self-locking linkage and a driving structure, the first self-locking linkage is connected to the inner grinding disk, the combined grinding ring includes a plurality of ring bodies sequentially arranged on the outside of the inner grinding disk, the second self-locking linkage is connected to the plurality of ring bodies at the same time, and the driving structure is simultaneously connected to the first self-locking linkage and the second self-locking linkage. When the driving structure is actuated, the first self-locking linkage drives the inner grinding disk to move up in a self-locking manner, and at the same time, the plurality of ring bodies move up in a self-locking manner at different speeds.

[0014] In some embodiments, the first self-locking linkage comprises a first transmission shaft having a bearing seat rotatably mounted on the top of the housing, and a first worm gear and a first gear are disposed on the first transmission shaft;

[0015] A continuous first tooth groove is opened at the side of the feeding barrel, the first gear is engaged with the first tooth groove, and a first worm is passed through the top of the shell, the first worm is engaged with the first worm wheel, and the first worm is rotatably connected to the shell, and the driving structure is connected to the first worm.

[0016] In some embodiments, the bottom end of the ring body is flush with the bottom ends of the outer grinding ring and the inner grinding disc, and the height of the ring body decreases from the inside to the outside, and the whole is in a stepped shape;

[0017] The second self-locking linkage comprises a plurality of second transmission shafts rotatably mounted on the extension bracket by means of bearings, the second transmission shafts correspond to the ring body one by one, and the second transmission shafts are each provided with a second worm wheel and a second gear, and a plurality of second worms corresponding to the second worm wheels one by one are installed through the top of the housing, the driving structure is connected with the second worm, the second worm wheel and the first worm wheel and the second worm and the first worm are of the same size, the size of the innermost second gear is smaller than the size of the first gear, and the size of the second gear gradually decreases in the direction from the inside to the outside of the ring body;

[0018] Second tooth grooves corresponding to the second gears are respectively formed on the outer side of the ring body, and the second gears are respectively engaged with the corresponding second tooth grooves.

[0019] In some embodiments, the driving structure includes a plurality of sprockets respectively fixed on the top of the first worm and the second worm, and a chain is arranged on the outside of the sprockets so that the plurality of sprockets respectively drive the first worm wheel and the second worm wheel to rotate synchronously.

[0020] In some embodiments, a shield is detachably mounted on the top of the shell, the sprocket and the chain are both located inside the shield, and a driving shaft passes through the shield, the driving shaft is fixedly connected to any second worm, and a wrench is also provided at the end of the driving shaft.

[0021] In some embodiments, a scale groove is provided on the surface of the shield, and the end of the wrench faces the scale indicated by the scale groove.

[0022] In some embodiments, vertical guide rails are provided on the outside of the feeding barrel and multiple ring bodies, and guide rail grooves are provided on the inside of the ring body, the shell and the inner side of the outer grinding ring near the guide rails to meet the lifting and lowering of the feeding barrel and the ring body and restrict them from rotating.

[0023] In some embodiments, the top of the feeding barrel is funnel-shaped.

[0024] The present invention has at least the following beneficial effects:

[0025] 1. Through the design of the lower grinding disc, outer grinding ring, inner grinding disc and combined grinding ring, the inner grinding disc is adapted to the size of the metal abrasive and the grinding gap is adjusted in a targeted manner to form grinding gaps of different heights, so that the metal abrasive is ground layer by layer with limited steps, which can ensure that the particles will enter the next grinding gap only after grinding to a certain particle size, ensuring the homogeneity of the grinding. Especially for large-sized metal abrasives, they can be quickly ground and crushed at the initial stage through the adapted grinding gap, so as to facilitate the subsequent fine grinding position as a whole, thereby effectively accelerating the efficiency of crushing and fine grinding.

[0026] 2. When adjusting the grinding gap of the inner grinding disc, a right-angle step surface will be formed between the inner grinding disc and the outer grinding ring. At this time, the metal particles that are initially ground and crushed are easily blocked by the right-angle step surface, so the lower grinding disc needs to rotate continuously to loosen them and send them to the bottom of the outer grinding ring, which is time-consuming and affects the metal powder grinding efficiency. Therefore, through the design of the combined grinding ring, a continuous stepped inclined surface will be formed between the inner grinding disc and the outer grinding ring, thereby accelerating the initial ground and crushed metal particles to enter the outer grinding ring for fine grinding, effectively improving the grinding efficiency, and the continuous stepped bevel with small size difference will also generate a large contact pressure due to the small contact surface with the metal particles, which will also aggravate the crushing of the metal particles and further improve the grinding efficiency.

[0027] 3. Through the design of synchronous self-locking drive components, when adjusting the height of the inner grinding disc and the combined grinding ring, their positions can be self-locked simultaneously and synchronously, thereby effectively facilitating the adjustment of the grinding gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 Schematic diagram of the structure after the shell is cut in half;

[0030] Figure 3 For the present invention Figure 2 Schematic diagram of local structure;

[0031] Figure 4 It is a bottom view structural diagram of the inner grinding disc, the outer grinding ring and the combined grinding ring of the present invention;

[0032] Figure 5 It is a schematic diagram of the front view structure of the inner grinding disc, the outer grinding ring and the combined grinding ring of the present invention;

[0033] Figure 6 For the present invention Figure 5 Another structural diagram;

[0034] Figure 7 This is a schematic diagram of the driving structure of the present invention;

[0035] Figure 8 For the present invention Figure 6 Schematic diagram of the local cross-section structure;

[0036] Fig. 9 For the present invention Figure 8 Schematic diagram of the main plane structure;

[0037] Fig.10 For the present invention Fig. 9 Schematic diagram of the structure after adjusting the grinding gap.

[0038] In the figure: 1, shell; 11, middle supporting plate; 12, discharge port; 2, lower grinding disc; 21, driving member; 3, outer grinding ring; 31, extension bracket; 4, inner grinding disc; 41, feeding barrel; 5, combined grinding ring; 6, synchronous self-locking driving component; 61, first self-locking linkage member; 62, second self-locking linkage member; 63, driving structure; 51, ring body; 611, first transmission shaft; 612, first worm wheel; 613, first worm; 614, first gear; 615, first tooth groove; 621, second transmission shaft; 622, second worm wheel; 623, second gear; 624, second worm; 625, second tooth groove; 631, sprocket; 632, chain; 7, shield; 71, driving shaft; 72, spanner; 73, scale groove; 8, guide rail; 81, guide rail groove. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Embodiment 1: The present invention provides a technical solution:

[0041] See attached Figure 1-4 As shown, a metal powder grinding device includes a housing 1, a middle support plate 11 and a discharge port 12. The housing 1, the middle support plate 11 and the discharge port 12 are conventional designs and do not involve the protection content of this application, so they are not described in detail.

[0042] Lower grinding disc 2, outer grinding ring 3, inner grinding disc 4, combined grinding ring 5 and synchronous self-locking drive component 6;

[0043] As attached Figure 4 As shown, the combined grinding ring 5 and the outer grinding ring 3 are sequentially nested on the outer side of the inner grinding disc 4 from the inside to the outside;

[0044] As attached Figure 3 As shown, the lower grinding disc 2 is rotatably mounted on the middle support plate 11 by means of a rotating shaft, and a driving member 21 is provided at the bottom of the middle support plate 11. The driving member 21 is conventionally driven by a motor, and its power output end is connected to the mounting shaft of the lower grinding disc 2;

[0045] An extension bracket 31 is fixed to the top of the housing 1, and the outer grinding ring 3 is fixed to the bottom end of the extension bracket 31 and is located directly above the lower grinding disc 2;

[0046] The inner grinding disc 4 is installed inside the outer grinding ring 3, and its bottom end is flush with the bottom end of the outer grinding ring 3. A feed barrel 41 is fixed through the inner grinding disc 4, and the feed barrel 41 extends to the outside of the housing 1;

[0047] The combined grinding ring 5 is arranged between the outer grinding ring 3 and the inner grinding disc 4;

[0048] In this way, the metal material is fed from the feed tube 41 and the driving member 21 can be used to perform continuous metal grinding processing.

[0049] The synchronous self-locking driving component 6 is installed on the housing 1 and is connected to the inner grinding disc 4 and the combined grinding ring 5. The design purpose is to adjust the lifting of the inner grinding disc 4 relative to the lower grinding disc 2, and the combined rings of the combined grinding ring 5 are lifted and lowered simultaneously and asynchronously, so that the initial grinding gap can be adjusted according to the size of the metal abrasive, thereby accelerating the grinding efficiency and strengthening the control of the particle size of the metal abrasive. Fig.10 As shown, the combined grinding ring 5 forms a stepped guide structure between the inner grinding disc 4 and the outer grinding ring 3, which accelerates the crushing of metal materials and their entry into the outer grinding ring 3 for fine grinding.

[0050] As attached Fig. 9 As shown, the bottom of the feed barrel 41 is in the shape of an inverted funnel, and the opening at the bottom gradually becomes larger. Such a design enables large-sized metal materials to be guided and crushed at the opening, thereby accelerating their crushing and entering the inner grinding disc 4 for grinding.

[0051] Participate in the Figure 6 -Attached Fig. 9 As shown, the synchronous self-locking driving component 6 includes a first self-locking linkage 61, a second self-locking linkage 62 and a driving structure 63. The first self-locking linkage 61 is connected to the inner grinding disk 4, and the combined grinding ring 5 includes a plurality of ring bodies 51 which are sequentially sleeved on the outer side of the inner grinding disk 4. The second self-locking linkage 62 is connected to the plurality of ring bodies 51 at the same time, and the driving structure 63 is connected to the first self-locking linkage 61 and the second self-locking linkage 62 at the same time. When the driving structure 63 is actuated, the first self-locking linkage 61 drives the inner grinding disk 4 to move up in a self-locking manner, and at the same time, the plurality of ring bodies 51 move up in a self-locking manner at different speeds.

[0052] As attached Fig. 9 As shown, the first self-locking linkage 61 includes a first transmission shaft 611 on the top of the housing 1 rotatably mounted on the bearing seat, and a first worm gear 612 and a first gear 614 are arranged on the first transmission shaft 611;

[0053] A continuous first tooth groove 615 is provided on the side of the feeding barrel 41 , the first gear 614 is engaged with the first tooth groove 615 , and a first worm 613 is passed through the top of the shell 1 , the first worm 613 is engaged with the first worm wheel 612 , and the first worm 613 is rotationally connected to the shell 1 , and the driving structure 63 is connected to the first worm 613 .

[0054] As attached Figure 5-6 As shown, the bottom end of the ring body 51 is flush with the bottom ends of the outer grinding ring 3 and the inner grinding disc 4, and the height of the ring body 51 decreases from the inside to the outside, and the whole is in a stepped shape;

[0055] As attached Figure 6 And attached Figure 8 As shown, the second self-locking linkage 62 includes a plurality of second transmission shafts 621 rotatably mounted on the extension bracket 31 by means of bearings, the second transmission shafts 621 correspond to the ring body 51 one by one, and the second transmission shafts 621 are each provided with a second worm wheel 622 and a second gear 623, and a plurality of second worms 624 corresponding to the second worm wheels 622 one by one are installed through the top of the housing 1, the driving structure 63 is connected to the second worm 624, the second worm wheel 622 and the first worm wheel 612, and the second worm 624 and the first worm 613 are of exactly the same size, the size of the innermost second gear 623 is smaller than the size of the first gear 614, and the size of the second gear 623 gradually decreases in the direction from the inside to the outside of the ring body 51;

[0056] Second tooth grooves 625 corresponding to the second gears 623 are respectively formed on the outer side of the ring body 51 , and the second gears 623 are respectively engaged with the corresponding second tooth grooves 625 .

[0057] Furthermore, through the cooperative driving of the above-mentioned worm wheels and worms, real-time self-locking and positioning of the inner grinding disc 4 and the combined grinding ring 5 can be achieved during the adjustment of the grinding gap, without the need for additional fixing, and the entire adjustment process is simple and convenient.

[0058] As attached Figure 7 As shown, the driving structure 63 includes a plurality of sprockets 631 respectively fixed on the top of the first worm 613 and the second worm 624, and a chain 632 is arranged outside the sprockets 631 so that the plurality of sprockets 631 respectively drive the first worm wheel 612 and the second worm wheel 622 to rotate synchronously.

[0059] A protective cover 7 is detachably mounted on the top of the shell 1, and the sprocket 631 and the chain 632 are both located inside the protective cover 7. The design of the protective cover 7 is to hide and isolate the various parts to prevent environmental dust from affecting the accuracy of the drive and transmission. A driving shaft 71 also runs through the protective cover 7, and the driving shaft 71 is fixedly connected to any second worm 624. A wrench 72 is also provided at the end of the driving shaft 71, and the wrench 72 can be used to conveniently set the rotation of each worm to adjust the grinding gap.

[0060] As attached Figure 1-2 As shown, a scale groove 73 is opened on the surface of the shield 7, and the end of the wrench 72 is opposite to the scale indicated by the scale groove 73. In this way, when the grinding gap is adjusted and the wrench 72 is rotated, the real-time grinding gap can be determined according to the scale mark, which is convenient for adjustment and use.

[0061] As attached Figure 7-8 As shown, vertical guide bars 8 are provided on the outer sides of the feed barrel 41 and the multiple ring bodies 51, and guide rail grooves 81 are provided on the inner sides of the ring bodies 51, the shell 1 and the inner sides of the outer grinding ring 3 near the guide bars 8 to meet the lifting and lowering requirements of the feed barrel 41 and the ring bodies 51 and to restrict them from rotating.

[0062] Furthermore, the top of the feeding tube 41 is funnel-shaped to facilitate grinding and feeding.

[0063] In summary, when the present application is used in the manufacture of metal powder:

[0064] Initial state: the equipment is not started, the lower grinding disc 2 is driven by the driving member 21, but is in a stationary state, the inner grinding disc 4 and the combined grinding ring 5 (composed of multiple ring bodies 51) are located directly above the lower grinding disc 2, and the feeding barrel 41 of the inner grinding disc 4 extends to the outside of the shell 1, ready to receive metal powder.

[0065] Feeding: Metal powder is poured in through the funnel-shaped opening at the top of the feeding barrel 41 , and the powder falls evenly into the grinding area between the inner grinding disc 4 and the outer grinding ring 3 along the bottom funnel-shaped structure of the feeding barrel 41 .

[0066] Start grinding:

[0067] The operator rotates the wrench 72 on the protective cover 7 to drive the driving shaft 71 and any second worm 624 fixed thereto to rotate;

[0068] Due to the synchronous action of the sprocket 631 and the chain 632, the first worm 613 and the second worm 624 rotate synchronously;

[0069] The first worm 613 rotates to drive the first worm wheel 612 to rotate, and then the first gear 614 engages with the first tooth groove 615 on the side of the feeding barrel 41, so that the inner grinding disc 4 moves upward in a self-locking manner to adjust the grinding gap according to needs;

[0070] At the same time, the second worm 624 rotates to drive the corresponding second worm gear 622 to rotate, and then the second gear 623 engages with the second tooth groove 625 on the outer side of the ring body 51, so that the multiple ring bodies 51 move up in a self-locking manner at different speeds to form a stepped guide structure, as shown in the attached figure. Fig.10 shown.

[0071] Grinding process: As the inner grinding disc 4 and the combined grinding ring 5 rise and fall, the metal powder is subjected to the action of multiple layers of grinding surfaces between the lower grinding disc 2, the outer grinding ring 3, the inner grinding disc 4 and the combined grinding ring 5, achieving efficient and uniform grinding.

[0072] Discharging: The ground metal powder falls into the discharging port 12 through the gap between the lower grinding disc 2 and the housing 1, completing the discharging process.

[0073] Example 2: Based on the above-mentioned Example 1, the present invention provides an optimized technical solution: for the extension bracket 31, a telescopic extension bracket 31 with self-locking capability can be selected. The purpose of this design is to enable the outer grinding ring 3 to also adjust the grinding gap, thereby achieving the purpose of adjusting the final particle size of the metal powder, so as to produce metal powders of different particle sizes according to demand.

[0074] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal powder grinding device, comprising a housing (1), a center support plate (11) and a discharge port (12), characterized in that: Also includes The lower grinding disc (2) is rotatably mounted on the middle supporting plate (11) by means of a rotating shaft, and a driving member (21) is provided at the bottom of the middle supporting plate (11), wherein the driving member (21) is connected to the rotating shaft of the lower grinding disc (2) to drive the lower grinding disc (2) to rotate continuously; An outer grinding ring (3), an extension bracket (31) is fixed to the top of the housing (1), the outer grinding ring (3) is fixed to the bottom end of the extension bracket (31) and is located directly above the lower grinding disc (2); An inner grinding disc (4) is mounted on the inner side of the outer grinding ring (3), with its bottom end flush with the bottom end of the outer grinding ring (3), and a feed barrel (41) is fixedly passed through the inner grinding disc (4), and the feed barrel (41) extends to the outside of the housing (1); A combined grinding ring (5) is arranged between the outer grinding ring (3) and the inner grinding disc (4); a synchronous self-locking drive component (6) mounted on the housing (1) and connected to both the inner grinding disc (4) and the combined grinding ring (5); the synchronous self-locking drive component (6) is configured to move to adjust the inner grinding disc (4) relative to the lower grinding disc (2), and the combined rings of the combined grinding ring (5) are simultaneously and asynchronously raised and lowered to form a stepped guide structure between the inner grinding disc (4) and the outer grinding ring (3); The synchronous self-locking driving component (6) comprises a first self-locking linkage member (61), a second self-locking linkage member (62) and a driving structure (63); the first self-locking linkage member (61) is connected to the inner grinding disc (4); the combined grinding ring (5) comprises a plurality of ring bodies (51) which are sequentially sleeved on the outer side of the inner grinding disc (4); the second self-locking linkage member (62) is simultaneously connected to the plurality of ring bodies (51); and the driving structure (63) is simultaneously connected to the first self-locking linkage member (61) and the second self-locking linkage member (62); when the driving structure (63) is in motion, the first self-locking linkage member (61) drives the inner grinding disc (4) to move upward in a self-locking manner, and simultaneously the plurality of ring bodies (51) move upward in a self-locking manner at different speeds; The first self-locking linkage member (61) comprises a first worm wheel (612), a first worm (613) and a first gear (614); The bottom ends of the ring body (51) are flush with the bottom ends of the outer grinding ring (3) and the inner grinding disc (4), and the height of the ring body (51) decreases from the inside to the outside, and the whole is in a stepped shape; The second self-locking linkage member (62) comprises a plurality of second transmission shafts (621) which are rotatably mounted on the extension bracket (31) by means of bearings. The second transmission shafts (621) correspond to the ring body (51) one by one, and the second transmission shafts (621) are each provided with a second worm wheel (622) and a second gear (623). A plurality of second worms (624) which correspond to the second worm wheels (622) one by one are installed through the top of the housing (1). The driving structure (63) is connected to the second worms (624). The second worm wheel (622) and the first worm wheel (612) and the second worm wheel (624) and the first worm wheel (613) have the same size model. The size of the innermost second gear (623) is smaller than that of the first gear (614), and the size of the second gear (623) gradually decreases in the direction from the inside to the outside of the ring body (51). Second tooth grooves (625) corresponding to the second gears (623) are respectively provided on the outside of the ring body (51), and the second gears (623) are respectively engaged with the corresponding second tooth grooves (625).

2. The metal powder grinding device according to claim 1, characterized in that: The bottom of the feeding cylinder (41) is in the shape of an inverted funnel, and the opening at the bottom gradually increases.

3. The metal powder grinding device according to claim 2, characterized in that: The first self-locking linkage member (61) comprises a first transmission shaft (611) rotatably mounted on the top of the housing (1) with a bearing seat, and a first worm gear (612) and a first gear (614) are arranged on the first transmission shaft (611); A continuous first tooth groove (615) is provided on the side of the feeding barrel (41), the first gear (614) is engaged with the first tooth groove (615), and a first worm (613) passes through the top of the housing (1), the first worm (613) is engaged with the first worm wheel (612), and the first worm (613) is rotationally connected to the housing (1), and the driving structure (63) is connected to the first worm (613).

4. The metal powder grinding device according to claim 3, characterized in that: The driving structure (63) comprises a plurality of sprockets (631) respectively fixed to the top of the first worm gear (613) and the second worm gear (624), and a chain (632) is arranged outside the sprockets (631) so that the plurality of sprockets (631) respectively drive the first worm gear (612) and the second worm gear (622) to rotate synchronously.

5. The metal powder grinding device according to claim 4, characterized in that: A shield (7) is detachably mounted on the top of the housing (1); the sprocket (631) and the chain (632) are both located inside the shield (7); a driving shaft (71) also runs through the shield (7); the driving shaft (71) is fixedly connected to any second worm (624); and a wrench (72) is also provided at the end of the driving shaft (71).

6. The metal powder grinding device according to claim 5, characterized in that: A scale groove (73) is provided on the surface of the shield (7), and the end of the wrench (72) is directly opposite to the scale indicated by the scale groove (73).

7. The metal powder grinding device according to claim 6, characterized in that: Vertical guide rails (8) are provided on the outside of the feed barrel (41) and the plurality of ring bodies (51), and guide rail grooves (81) are provided on the inside of the ring bodies (51), the shell (1) and the inner side of the outer grinding ring (3) near the guide rails (8) to meet the lifting and lowering requirements of the feed barrel (41) and the ring bodies (51) and to restrict them from rotating.

8. The metal powder grinding device according to claim 7, characterized in that: The top end of the feeding cylinder (41) is funnel-shaped.

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