Novel bonded neodymium iron boron magnetic powder crusher

Abstract

The utility model relates to the technical field of neodymium-iron-boron magnetic powder processing, in particular to a novel bonded neodymium-iron-boron magnetic powder crusher which comprises a machine body fixed on a mounting frame. A fixed cutter head is installed on one side of the interior of the machine body, two concentric circles are arranged at the half position and the outermost edge position of the fixed cutter head in the outer diameter direction, and a plurality of first fixing seats which are arranged at equal intervals are installed on the concentric circles at the half position of the fixed cutter head in the outer diameter direction. A plurality of second fixing seats which are arranged at equal intervals are mounted on a concentric circle at the outermost edge of the fixed cutter head, and arc sawteeth are fixed on the second fixing seats and the first fixing seats; a driving shaft is installed on the side, away from the fixed cutter head, in the machine body. When the novel bonded neodymium-iron-boron magnetic powder crusher is used, the hexagonal rods and the sawteeth of the movable cutter head and the arc sawteeth of the fixed cutter head are mutually meshed and relatively move to generate cutting, so that the neodymium-iron-boron magnetic powder is crushed.

Description

Technical Field

[0001] The utility model relates to the technical field of neodymium iron boron magnetic powder processing, in particular to a new type of bonded neodymium iron boron magnetic powder crusher. Background Art

[0002] As a new generation of magnetic materials, neodymium iron boron rare earth permanent magnet materials have quickly become the dominant players in the rare earth permanent magnet market since their inception due to their excellent magnetic properties and high cost performance. Bonded neodymium iron boron magnets have the advantages of light weight, complex product shapes, and high dimensional accuracy, and play a very important role in fields such as smart home appliances, new energy vehicles, and aerospace, with an irreplaceable role. With the increasing requirements for equipment accuracy, higher requirements are put forward for the particle size of magnetic powder. Currently, bonded magnet enterprises generally require that the proportion of magnetic powder with a particle size below 120 mesh accounts for 98%, so higher requirements are put forward for crushers.

[0003] The publication number CN216322494U discloses a pulverizer for magnetic powder processing, which adopts a roller crushing method. The first gear and the second gear drive the driving roller to start rotating, driving the transmission belt and the driven roller to start moving in the counterclockwise direction. The raw materials follow the movement of the transmission belt, and the grinding protrusions can grind the raw materials during the movement. The crushing is insufficient and the particle size of the magnetic powder is large. The publication number CN213078687U discloses a neodymium iron boron magnetic powder crushing device, which is better applied to the crushing of neodymium iron boron materials, but it is necessary to adjust the blade spacing to crush finer magnetic powder, the operation is inconvenient, and the crushing effect is limited. Content of the Utility Model

[0004] The purpose of the utility model is to solve the above-mentioned disadvantages in the prior art, and to propose a new type of bonded neodymium iron boron magnetic powder crusher.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme: design a new type of bonded neodymium iron boron magnetic powder crusher, including a machine body, and the machine body is fixed on the mounting frame;

[0006] One side inside the machine body is provided with a fixed cutter disc. Two concentric circles are provided at the midpoint and the outermost edge along the outer diameter direction of the fixed cutter disc. A number of equally spaced first fixed seats are installed on the concentric circle at the midpoint along the outer diameter direction of the fixed cutter disc, and a number of equally spaced second fixed seats are installed on the concentric circle at the outermost edge of the fixed cutter disc. Arc sawteeth are fixed on both the second fixed seats and the first fixed seats;

[0007] A drive shaft is installed on one side of the machine body far away from the fixed cutter disc. The drive shaft penetrates the machine body and is connected to the machine body through bearings, and the bearings are fixed by bearing end covers. A drive mechanism for driving the drive shaft to rotate is installed at one end of the drive shaft away from the machine body. A moving cutter disc is coaxially installed at the other end of the drive shaft. Concentric circles are provided at one-third, two-thirds, and the outermost edge of the outer diameter of the moving cutter disc. A number of first hexagonal bars are provided on the concentric circle at one-third of the outer diameter of the moving cutter disc, and a number of second hexagonal bars are installed on the concentric circle at two-thirds of the outer diameter of the moving cutter disc. Among them, the first hexagonal bars and the second hexagonal bars are respectively engaged with the arc-shaped saw teeth on the first fixed seat and the arc-shaped saw teeth on the second fixed seat, and arc-shaped saw teeth are installed on the concentric circle at the outermost edge of the moving cutter disc.

[0008] Preferably, a front cover and a rear cover are respectively arranged on both sides of the machine body. The front cover and the rear cover are both fixed on the machine body by screws, and the drive shaft is rotatably installed on the rear cover.

[0009] Preferably, a powder inlet pipe is installed at one-third of the upper end of the front cover, and a feed inlet corresponding to the powder inlet pipe is opened on the fixed cutter disc. The bottom of the powder inlet pipe is correspondingly connected to the feed inlet. A powder collection bin is arranged at the bottom of the machine body, and a discharge port is installed at the bottom of the powder collection bin.

[0010] Preferably, the powder inlet pipe is bent upward in an "L" shape, and a hopper is installed at the top of the powder inlet pipe;

[0011] A spiral conveyor shaft is arranged inside the powder inlet pipe. The bottom of the spiral conveyor shaft is rotatably installed on the connecting frame, and the connecting frame is fixed to the inner wall of the powder inlet pipe. The top of the spiral conveyor shaft penetrates the powder inlet pipe and is connected to a second driving motor. The second driving motor is fixed to the powder inlet pipe through a bracket, and the spiral conveyor shaft is rotatably connected to the powder inlet pipe.

[0012] Preferably, a sieve is installed at the top port of the powder collection bin, and the mesh number of the sieve is 120 meshes.

[0013] Preferably, a number of turnover plates arranged at intervals are installed along the edge of the moving cutter disc, and the turnover plates are perpendicular to the moving cutter disc, and the side surface of the turnover plate is in clearance fit with the inner wall of the machine body.

[0014] Preferably, there are fourteen first fixed seats in total, and there are twenty second fixed seats in total;

[0015] There are six first hexagonal bars in total, twelve second hexagonal bars in total, and six saw teeth in total.

[0016] Preferably, the drive mechanism includes a first pulley coaxially fixed to the drive shaft. Below the first pulley is provided a second pulley, and the second pulley is connected to the first pulley by a belt. A first drive motor is installed on the second pulley, and the first drive motor is fixed to the mounting bracket.

[0017] Preferably, a pressing cover is provided on one side of the moving cutter disc, and a positioning sleeve is arranged on the drive shaft. The positioning sleeve is fixed to the pressing cover to clamp and fix the moving cutter disc on the drive shaft.

[0018] The design scheme proposed by the present utility model has the following beneficial effects during application:

[0019] 1. The new bonded neodymium iron boron magnetic powder crusher completes the crushing of neodymium iron boron magnetic powder through the mutual biting and relative movement between the hexagonal bars and sawteeth on the moving cutter disc and the arc sawteeth on the fixed cutter disc. After the 40-mesh magnetic powder is crushed by this crushing device, the proportion of particles below 120 mesh accounts for 99%, and the crushing efficiency is high.

[0020] 2. The new bonded neodymium iron boron magnetic powder crusher has high wear resistance of the hexagonal bars and arc sawteeth, so that the service life of the crusher is longer, and the production cost and maintenance cost can be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is a schematic diagram of the internal structure of the body of the present utility model;

[0023] Figure 3 is a schematic diagram of the internal structure of the powder inlet pipe of the present utility model;

[0024] Figure 4 is a schematic diagram of the structure of the fixed cutter disc of the present utility model;

[0025] Figure 5 is a schematic diagram of the structure of the moving cutter disc of the present utility model.

[0026] In the figure: 1. Body; 2. Front cover; 3. Rear cover; 4. Screw; 5. Powder inlet pipe; 6. Powder collection bin; 7. Discharge port; 8. Screen; 9. Fixed cutter disc; 10. First fixed seat; 11. Second fixed seat; 12. Drive shaft; 13. Bearing end cover; 14. First pulley; 15. Second pulley; 16. Moving cutter disc; 17. First hexagonal bar; 18. Second hexagonal bar; 19. Sawtooth; 20. Pressing cover; 21. Positioning sleeve; 22. Belt; 23. First drive motor; 24. Mounting bracket; 25. Feeding hopper; 26. Screw conveyor shaft; 27. Second drive motor; 28. Turning plate; 29. Feed inlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0028] Refer to Figures 1 - 5 , a new type of bonded neodymium iron boron magnetic powder crusher, including a machine body 1, the machine body 1 is fixed on the mounting frame 24 for providing support to the machine body 1;

[0029] On both sides of the machine body 1, a front cover 2 and a rear cover 3 are respectively arranged. The front cover 2 and the rear cover 3 are both fixed on the machine body 1 through screws 4; at the upper one-third of the front cover 2, a powder inlet pipe 5 is installed, and a feed inlet 29 corresponding to the powder inlet pipe 5 is opened on the fixed cutter disc 9, and the bottom of the powder inlet pipe 5 is correspondingly connected to the feed inlet 29. A powder collection bin 6 is arranged at the bottom of the machine body 1, and a discharge port 7 is installed at the bottom of the powder collection bin 6, so that the neodymium iron boron magnetic powder can enter the machine body 1 from the powder inlet pipe 5;

[0030] Specifically, the powder inlet pipe 5 is bent upward in an "L" shape, and a feeding hopper 25 is installed at the top of the powder inlet pipe 5 to facilitate feeding the neodymium iron boron magnetic powder raw material into the powder inlet pipe 5;

[0031] As Figure 3 shown, a spiral conveyor shaft 26 is arranged inside the powder inlet pipe 5. The bottom of the spiral conveyor shaft 26 is rotatably installed on the connecting frame, and the connecting frame is fixed to the inner wall of the powder inlet pipe 5. The top of the spiral conveyor shaft 26 penetrates through the powder inlet pipe 5 and is connected to a second driving motor 27. The second driving motor 27 is fixed to the powder inlet pipe 5 through a bracket, and the spiral conveyor shaft 26 is rotatably connected to the powder inlet pipe 5. After the neodymium iron boron magnetic powder raw material enters the feeding hopper 25, the rotation of the spiral conveyor shaft 26 will accelerate the conveyance of the neodymium iron boron magnetic powder raw material into the machine body 1, thereby preventing a large amount of neodymium iron boron magnetic powder raw material from being crowded in the powder inlet pipe 5, which may cause the powder inlet pipe 5 to be blocked and affect the conveyance of the neodymium iron boron magnetic powder raw material into the machine body 1.

[0032] On one side inside the machine body 1, a fixed cutter disc 9 is installed. Two concentric circles are provided at the midpoint and the outermost edge along the outer diameter direction of the fixed cutter disc 9. On the concentric circle at the midpoint along the outer diameter direction of the fixed cutter disc 9, a number of equally spaced first fixing seats 10 are installed. There are a total of fourteen first fixing seats 10 and they are arranged in a circular pattern along the midpoint of the outer diameter direction of the fixed cutter disc 9. On the concentric circle at the outermost edge of the fixed cutter disc 9, a number of equally spaced second fixing seats 11 are installed. There are a total of twenty second fixing seats 11 and they are arranged in a circular pattern along the outermost edge of the fixed cutter disc 9. Arc saw teeth are fixed on both the second fixing seats 11 and the first fixing seats 10;

[0033] On one side of the machine body 1 away from the fixed cutter disc 9, a drive shaft 12 is installed. The drive shaft 12 penetrates the machine body 1 and is connected to the machine body 1 through bearings, and the bearings are fixed by bearing end covers 13, that is, the drive shaft 12 is rotatably installed on the rear cover 3. One end of the drive shaft 12 away from the machine body 1 is installed with a drive mechanism for driving the drive shaft 12 to rotate. Among them, the drive mechanism includes a first pulley 14, the first pulley 14 is coaxially fixed on the drive shaft 12, and a second pulley 15 is arranged below the first pulley 14, and the second pulley 15 is connected to the first pulley 14 through a belt 22. A first drive motor 23 is installed on the second pulley 15, and the first drive motor 23 is fixed on the mounting bracket 24 to provide power for the rotation of the drive shaft 12; at the same time, by adjusting the frequency of the first drive motor 23, the speed of rotation of the moving cutter disc 16 can be realized, and then the biting speed of the hexagonal bar and the arc-shaped saw teeth of the fixed cutter disc 9 can be adjusted.

[0034] On the other end of the drive shaft 12, a moving cutter disc 16 is coaxially installed. Concentric circles are provided at one-third, two-thirds, and the outermost edge of the outer diameter of the moving cutter disc 16. A number of first hexagonal bars 17 are provided on the concentric circle at one-third of the outer diameter of the moving cutter disc 16. There are six first hexagonal bars 17 in total and they are arranged in a circumferential pattern along one-third of the outer diameter of the moving cutter disc 16. A number of second hexagonal bars 18 are installed on the concentric circle at two-thirds of the outer diameter of the moving cutter disc 16. There are twelve second hexagonal bars 18 in total and they are arranged in a circumferential pattern along two-thirds of the outer diameter of the moving cutter disc 16. Among them, the first hexagonal bars 17 and the second hexagonal bars 18 are respectively engaged with the arc-shaped saw teeth on the first fixed seat 10 and the arc-shaped saw teeth on the second fixed seat 11. And an arc-shaped saw tooth 19 is installed on the concentric circle at the outermost edge of the moving cutter disc 16. There are six saw teeth 19 in total and they are arranged in a circumferential pattern along the outermost edge of the moving cutter disc 16. Under the relative movement of the hexagonal bars and the saw teeth on the moving cutter disc 16 and the arc-shaped saw teeth on the fixed cutter disc 9, the cutting operation of neodymium iron boron magnetic powder is realized.

[0035] Specifically, screens 8 are installed at the top ports of the powder collection bin 6. During actual use, the mesh number of the screen 8 at the powder collection bin 6 is 120 meshes. After being crushed, the magnetic powder passes through the 120-mesh screen 8 and enters the discharge port 7, and the discharge port 7 can be connected to a vibrating screen to obtain magnetic powder with a certain particle size. After the 40-mesh magnetic powder is crushed by this crushing device, the proportion of particles below 120 meshes is 99%, achieving a good crushing effect. The neodymium iron boron magnetic powder that does not pass through the screen 8 will be shoveled up by several turnover plates 28 arranged at intervals along the edge of the moving cutter disc 16. The turnover plates 28 are perpendicular to the moving cutter disc 16, and the side surfaces of the turnover plates 28 are in clearance fit with the inner wall of the machine body 1. As the moving cutter disc 16 rotates, the turnover plates 28 will shovel up the neodymium iron boron magnetic powder deposited at the bottom of the machine body 1. At this time, the neodymium iron boron magnetic powder will rotate with the moving cutter disc 16 on the turnover plates 28 until the side of the turnover plate 28 close to the drive shaft 12 inclines downward. The neodymium iron boron magnetic powder on the turnover plate 28 will start to move between the moving cutter disc 16 and the fixed cutter disc 9 and be crushed again until the neodymium iron boron magnetic powder raw material is completely crushed.

[0036] It should be noted that during actual use, since the front cover 2 and the rear cover 3 are both fixed to the machine body 1 by screws 4, the front cover 2 and the rear cover 3 can be disassembled on the machine body 1. In addition, a pressing cover 20 is provided on one side of the moving cutter disc 16, and a positioning sleeve 21 is provided on the drive shaft 12. The positioning sleeve 21 is fixed to the pressing cover 20 to clamp and fix the moving cutter disc 16 on the drive shaft 12. Therefore, the hexagonal bar can be replaced, that is, the moving cutter disc 16 can be replaced according to the diameter of the hexagonal bar, so as to adjust the biting gap between the hexagonal bar and the arc-shaped saw teeth on the fixed cutter disc 9 to meet the requirements of different magnetic powder crushing particle sizes.

[0037] Specifically, when the neodymium iron boron magnetic powder enters the machine body 1 through the powder inlet pipe 5, the first drive motor 23 drives the drive shaft 12 to rotate, thereby driving the moving cutter disc 16 to rotate. The hexagonal bar and the saw teeth 19 of the moving cutter disc 16 engage with the arc-shaped saw teeth on the fixed cutter disc 9 and move relative to each other to generate cutting, realizing the crushing operation of the neodymium iron boron magnetic powder entering the machine body 1.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A new type of bonded NdFeB magnetic powder crusher, characterized in that: It includes a machine body (1), and the machine body (1) is fixed on a mounting frame (24); On one side inside the machine body (1), a fixed cutter disc (9) is installed. Two concentric circles are provided at the midpoint and the outermost edge along the outer diameter direction of the fixed cutter disc (9). On the concentric circle at the midpoint along the outer diameter direction of the fixed cutter disc (9), a number of equally spaced first fixing seats (10) are installed. And on the concentric circle at the outermost edge of the fixed cutter disc (9), a number of equally spaced second fixing seats (11) are installed. Arc-shaped saw teeth are fixed on both the second fixing seats (11) and the first fixing seats (10); On the side of the machine body (1) far from the fixed cutter disc (9), a drive shaft (12) is installed. The drive shaft (12) penetrates the machine body (1) and is connected to the machine body (1) through a bearing, and the bearing is fixed by a bearing end cover (13). At one end of the drive shaft (12) far from the machine body (1), a drive mechanism for driving the drive shaft (12) to rotate is installed. On the other end of the drive shaft (12), a moving cutter disc (16) is coaxially installed. Concentric circles are provided at the one-third, two-thirds, and outermost edges along the outer diameter of the moving cutter disc (16). On the concentric circle at the one-third along the outer diameter of the moving cutter disc (16), a number of first hexagonal bars (17) are provided. And on the concentric circle at the two-thirds along the outer diameter of the moving cutter disc (16), a number of second hexagonal bars (18) are installed. Among them, the first hexagonal bars (17) and the second hexagonal bars (18) are respectively engaged with the arc-shaped saw teeth on the first fixing seats (10) and the arc-shaped saw teeth on the second fixing seats (11). And on the concentric circle at the outermost edge of the moving cutter disc (16), arc-shaped saw teeth (19) are installed.

2. The novel bonded NdFeB magnetic powder crusher according to claim 1, wherein: On both sides of the machine body (1), a front cover (2) and a rear cover (3) are respectively provided. The front cover (2) and the rear cover (3) are both fixed on the machine body (1) through screws (4). The drive shaft (12) is rotatably installed on the rear cover (3).

3. A novel bonded NdFeB magnetic powder crusher according to claim 2, characterized in that: At the upper one-third of the front cover (2), a powder inlet pipe (5) is installed. And on the fixed cutter disc (9), a feed inlet (29) corresponding to the powder inlet pipe (5) is provided. And the bottom of the powder inlet pipe (5) is correspondingly connected to the feed inlet (29). At the bottom of the machine body (1), a powder collection bin (6) is provided. And at the bottom of the powder collection bin (6), a discharge port (7) is installed.

4. A novel bonded NdFeB magnetic powder crusher according to claim 3, characterized in that: The powder inlet pipe (5) is bent upward in an "L" shape, and a hopper (25) is installed at the top of the powder inlet pipe (5); Inside the powder inlet pipe (5), a spiral conveyor shaft (26) is provided. The bottom of the spiral conveyor shaft (26) is rotatably installed on a connecting frame, and the connecting frame is fixed to the inner wall of the powder inlet pipe (5). And the top of the spiral conveyor shaft (26) penetrates the powder inlet pipe (5) and is connected to a second drive motor (27). The second drive motor (27) is fixed to the powder inlet pipe (5) through a bracket. And the spiral conveyor shaft (26) is rotatably connected to the powder inlet pipe (5).

5. A novel bonded NdFeB magnetic powder crusher according to claim 3, characterized in that: At the top port of the powder collection bin (6), a screen (8) is installed, and the mesh number of the screen (8) is 120 meshes.

6. A novel bonded NdFeB magnetic powder crusher according to claim 1, characterized in that: A number of turning plates (28) arranged at intervals are installed along the edge of the moving cutter disc (16), the turning plates (28) are perpendicular to the moving cutter disc (16), and the side surface of the turning plate (28) is in clearance fit with the inner wall of the machine body (1).

7. A novel bonded NdFeB magnetic powder crusher according to claim 1, characterized in that: There are fourteen first fixing seats (10) in total, and there are twenty second fixing seats (11); There are six first hexagonal bars (17) in total, there are twelve second hexagonal bars (18), and there are six saw teeth (19).

8. A novel bonded NdFeB magnetic powder crusher according to claim 1, characterized in that: The driving mechanism includes a first pulley (14), the first pulley (14) is coaxially fixed on the driving shaft (12), a second pulley (15) is arranged below the first pulley (14), and the second pulley (15) is connected to the first pulley (14) by a belt (22). A first driving motor (23) is installed on the second pulley (15), and the first driving motor (23) is fixed on the mounting bracket (24).

9. A novel bonded NdFeB magnetic powder crusher according to claim 1, characterized in that: A pressing cover (20) is arranged on one side of the moving cutter disc (16), a positioning sleeve (21) is arranged on the driving shaft (12), the positioning sleeve (21) is fixed to the pressing cover (20), and the moving cutter disc (16) is clamped and fixed on the driving shaft (12).

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