High-precision grinder

Abstract

The utility model relates to the field of grinding equipment, in particular to a high-precision grinder which comprises a machine shell, an upper knife grinding head, an upper knife connecting piece, a powder mixing ring, a lower knife grinding head, a grinding bin and a zero setting positioning ring, the upper knife grinding head is clamped and fixed on the inner side of the upper knife connecting piece, the upper knife connecting piece is clamped and fixed on the inner side of the powder mixing ring, and the lower knife connecting piece is clamped and fixed on the inner side of the zero setting positioning ring. The powder mixing ring is in meshed connection with the top of the machine shell through threads, the zero setting positioning ring is in meshed connection with the top of the grinding bin through threads, and in the rear section of production, the powder mixing ring is rotated to drive the upper grinding tool bit to be tightened downwards, so that the upper grinding tool bit makes contact with the lower grinding tool bit, and then the powder mixing ring is rotated reversely; the upper cutter grinding head moves upwards to be adjusted back by a certain distance, the current position is set to be the use zero position, then the zero setting positioning ring is rotated to move upwards until the upper end face of the zero setting positioning ring abuts against the lower end face of the upper cutter connecting piece, the effect of positioning the use zero position of the upper cutter connecting piece is achieved, and tolerance compensation is achieved; the cutter distance control precision is improved; and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of grinding equipment, in particular to a high-precision grinder. Background Art

[0002] A grinder is a device that grinds beans into powder. For example, a coffee grinder can usually adjust the distance between the upper grinding knife and the lower grinding knife, and then adjust the fineness of the ground powder to meet different grinding requirements. Existing plastic grinders have the following defects due to the limitations of the injection molding process: the dimensional stability of injection molded parts is poor, the cumulative tolerance is easy to exceed the standard, and the traditional structure cannot compensate for the production tolerance, resulting in low control accuracy of the distance between the upper grinding knife and the lower grinding knife. Therefore, high-precision molds and complex detection processes are required during production, which reduces production efficiency and increases production costs. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide a high-precision grinder that reduces production costs, can calibrate the zero position during the later stage of production, achieve tolerance compensation, and improve the control accuracy of the knife distance.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A high-precision grinder includes a machine shell, and also includes an upper grinding head, an upper knife connecting piece, a powder adjusting ring, a lower grinding head, a grinding chamber, and a zero-adjusting positioning ring. The upper grinding head is clamped and fixed inside the upper knife connecting piece, the upper knife connecting piece is clamped and fixed inside the powder adjusting ring, the powder adjusting ring is threadedly engaged with the top of the machine shell, the lower grinding head is rotatably arranged inside the grinding chamber, the grinding chamber is fixedly connected to the inside of the machine shell, the zero-adjusting positioning ring is threadedly engaged with the top of the grinding chamber, an avoidance opening is provided on the machine shell, the avoidance opening is arranged outside the zero-adjusting positioning ring, and the upper side of the zero-adjusting positioning ring is movably abutted against the lower side of the upper knife connecting piece.

[0006] Preferably, it further includes a first screw. A plurality of card slots are arranged in a circular array at the top of the grinding chamber. A screw hole is provided at the top of the zero-adjusting positioning ring. The first screw is threadedly engaged with the screw hole and is clamped in one of the card slots after passing downward through the screw hole.

[0007] Preferably, it further includes a zero-adjusting positioning pin. The zero-adjusting positioning pin is connected to a first stud. A plurality of second studs are evenly arranged on the outside of the machine shell. A through hole is provided on one side of the second stud, and it is connected to the first stud through a second screw. A positioning bone is connected to the bottom of the powder adjusting ring. The zero-adjusting positioning pin is movably inserted into the through hole, and one side of it passes through the through hole and is movably abutted against one side of the positioning bone.

[0008] Preferably, a first limiting ring and an elastic strip are provided on the outer side of the upper knife connecting piece. The elastic strip is arranged above the first limiting ring, and a first protrusion is connected to the side thereof away from the upper knife connecting piece. A first groove and a second limiting ring are provided on the inner side of the powder adjusting ring. The first groove is arranged above the second limiting ring and is arranged in a circular array with several of them. The first protrusion is movably clamped in one of the first grooves. The upper side of the first limiting ring is in movable abutment with the lower side of the second limiting ring, and the lower side of the elastic strip is in movable abutment with the upper side of the second limiting ring. An avoidance groove for the elastic strip to pass through is provided on the second limiting ring.

[0009] Preferably, a top ring is connected to the top of the upper grinding head. An entry groove is provided at the bottom of the outer side of the top ring. A limiting groove is communicated with one side of the entry groove. A limiting block is provided on the inner side of the upper knife connecting piece. The limiting block is movably inserted into the limiting groove. A second protrusion is provided in the limiting groove. A second groove is provided on the outer side of the limiting block. The second protrusion is movably clamped in the second groove.

[0010] Preferably, a sealing cover is detachably connected to the top of the upper knife connecting piece.

[0011] Preferably, a motor is further included. The output shaft of the motor passes upward through the grinding chamber and is connected to the lower grinding head.

[0012] Preferably, a reduction gearbox is further included. The output shaft of the motor is connected to the input end of the reduction gearbox. The output shaft of the reduction gearbox passes upward through the grinding chamber and is connected to the lower grinding head.

[0013] Preferably, a powder outlet channel is communicated with one side of the grinding chamber. The powder outlet channel penetrates through the avoidance opening.

[0014] Preferably, a plurality of first anti-slip protrusions are arranged in a circular array on the outer side of the powder adjusting ring, and a plurality of second anti-slip protrusions are arranged in a circular array on the outer side of the zero-adjusting positioning ring.

[0015] The beneficial effects of the present utility model are as follows:

[0016] In the latter stage of production of the high-precision grinder, by rotating the powder adjusting ring to drive the upper grinding head to tighten downward, the upper grinding head touches the lower grinding head, and then the powder adjusting ring is rotated in the reverse direction to make the upper grinding head move upward and callback a certain distance and set the current position as the use zero position, and then the zero-adjusting positioning ring is rotated to make the zero-adjusting positioning ring move upward until its upper end face abuts against the lower end face of the upper knife connecting piece, achieving the effect of positioning the use zero position of the upper knife connecting piece, realizing tolerance compensation, improving the control accuracy of the knife distance and reducing the production cost. Description of the Drawings

[0017] Figure 1 It is the first three-dimensional schematic diagram of the high-precision grinder.

[0018] Figure 2It is the second three-dimensional schematic diagram of the high-precision grinder.

[0019] Figure 3 It is the structural decomposition schematic diagram of the high-precision grinder.

[0020] Figure 4 It is the cross-sectional view of the high-precision grinder.

[0021] Figure 5 It is the decomposition schematic diagram of the upper grinding head and the upper tool connecting piece.

[0022] Figure 6 It is the structural schematic diagram of the powder adjusting ring.

[0023] Figure 7 It is the schematic diagram of the abutting state of the zero-adjusting positioning pin and the positioning bone.

[0024] Figure 8 It is the structural schematic diagram of the grinding chamber.

[0025] Figure 9 It is the structural schematic diagram of the zero-adjusting positioning ring.

[0026] Figure 10 It is the connection and installation schematic diagram of the lower grinding head and the motor.

[0027] Figure 11 For Figure 10 the decomposition schematic diagram of the structure in

[0028] In the figure: 1. Machine shell; 2. Upper grinding head; 3. Upper tool connecting piece; 4. Powder adjusting ring; 5. Lower grinding head; 6. Grinding chamber; 7. Zero-adjusting positioning ring; 8. Avoidance opening; 9. First screw; 10. Card slot; 11. Screw hole; 12. Zero-adjusting positioning pin; 13. First stud; 14. Second stud; 15. Through hole; 16. Positioning bone; 17. First limiting ring; 18. Elastic strip; 19. First protrusion; 20. First groove; 21. Second limiting ring; 22. Avoidance groove; 23. Top ring; 24. Entering groove; 25. Limiting groove; 26. Limiting block; 27. Second protrusion; 28. Second groove; 29. Motor; 30. Reduction gearbox; 31. Powder outlet channel; 32. First anti-slip protrusion; 33. Second anti-slip protrusion; 34. Arc-shaped handle; 35. Bean dialing piece; 36. Powder dialing piece; 37. Gasket; 38. Nut; 39. Convex shaft. Specific implementation manner

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1 - 11 , the present invention provides a technical solution: a high-precision grinder, including a machine shell 1, and further including an upper grinding head 2, an upper tool connecting piece 3, a powder adjusting ring 4, a lower grinding head 5, a grinding chamber 6 and a zero-adjusting positioning ring 7. The upper grinding head 2 is clamped and fixed inside the upper tool connecting piece 3. The upper tool connecting piece 3 is clamped and fixed inside the powder adjusting ring 4. The powder adjusting ring 4 is threadedly engaged with the top of the machine shell 1. The lower grinding head 5 is rotatably arranged in the grinding chamber 6. The grinding chamber 6 is fixedly connected to the inside of the machine shell 1. The zero-adjusting positioning ring 7 is threadedly engaged with the top of the grinding chamber 6. An avoidance opening 8 is provided on the machine shell 1, and the avoidance opening 8 is arranged outside the zero-adjusting positioning ring 7. The upper side of the zero-adjusting positioning ring 7 is movably abutted against the lower side of the upper tool connecting piece 3;

[0031] In the latter stage of production, by rotating the powder adjusting ring 4 from the avoidance opening 8, the powder adjusting ring 4 drives the upper grinding head 2 to move downward through the upper tool connecting piece 3, so that the upper grinding head 2 touches the lower grinding head 5. After touching, rotate the powder adjusting ring 4 in the reverse direction by a certain angle, so that the upper grinding head 2 moves upward and callbacks a certain distance and sets the current position as the use zero position. Then rotate the zero-adjusting positioning ring 7 so that the upper end surface of the zero-adjusting positioning ring 7 abuts against the lower end surface of the upper tool connecting piece 3, achieving the effect of positioning the use zero position of the upper tool connecting piece 3, realizing tolerance compensation, improving the tool distance control accuracy and reducing the production cost.

[0032] In order to facilitate locking the zero-adjusting positioning ring 7 after setting the use zero position and improve the structural stability, in this embodiment, preferably, it further includes a first screw 9. A plurality of card slots 10 are arranged in a circular array at the top of the grinding chamber 6. A screw hole 11 is provided at the top of the zero-adjusting positioning ring 7. The first screw 9 is threadedly engaged with the screw hole 11, and after passing through the screw hole 11 downward, it is clamped in one of the card slots 10;

[0033] The purpose is to rotate the zeroing positioning ring 7 after setting the zero position for use, so that the zeroing positioning ring 7 moves upward until its upper end face abuts against the lower end face of the upper knife connecting piece 3, achieving the effect of positioning the zero position for use of the upper knife connecting piece 3. Then, the flour adjusting ring 4 together with the upper knife connecting piece 3 and the upper grinding head 2 are removed. The first screw 9 is inserted into one of the card slots 10 at the top of the grinding bin 6 from the screw hole 11 above the zeroing positioning ring 7. By clamping the first screw 9 in the card slot 10, the zeroing positioning ring 7 cannot rotate, thereby achieving the effect of locking the zero position for use and improving the structural stability.

[0034] In order to facilitate providing multiple ways to structurally lock the zero position for use, in this embodiment, preferably, a zeroing positioning pin 12 is further included. The zeroing positioning pin 12 is connected to a first stud 13. A plurality of second studs 14 are evenly arranged on the outer side of the machine housing 1. A through hole 15 is provided on one side of the second stud 14, and it is connected to the first stud 13 by a second screw (not shown in the figure). A positioning bone 16 is connected to the bottom of the flour adjusting ring 4. The zeroing positioning pin 12 is movably inserted into the through hole 15, and after one side thereof passes through the through hole 15, it is movably abutted against one side of the positioning bone 16;

[0035] The purpose is to, after setting the zero position for use, pass the zeroing positioning pin 12 through the most suitable one of the multiple through holes 15 on the outer side of the machine housing 1, so that the side surface of the positioning bone 16 at the bottom of the flour adjusting ring 4 abuts against the side surface of the zeroing positioning pin 12, achieving the rotational limit of the flour adjusting ring 4. Then, the first stud 13 and the second stud 14 are connected by a second screw to fix the zeroing positioning pin 12, improving the structural stability.

[0036] In order to facilitate the connection or disconnection of the upper knife connecting piece 3 and the flour adjusting ring 4, in this embodiment, preferably, a first limiting ring 17 and an elastic strip 18 are provided on the outer side of the upper knife connecting piece 3. The elastic strip 18 is arranged above the first limiting ring 17, and a first protrusion 19 is connected to the side thereof away from the upper knife connecting piece 3. A first groove 20 and a second limiting ring 21 are provided on the inner side of the flour adjusting ring 4. The first groove 20 is arranged above the second limiting ring 21, and a plurality of them are arranged in a circular array. The first protrusion 19 is movably clamped in one of the first grooves 20. The upper side of the first limiting ring 17 is movably abutted against the lower side of the second limiting ring 21. The lower side of the elastic strip 18 is movably abutted against the upper side of the second limiting ring 21. An avoidance groove 22 for the elastic strip 18 to pass through is provided on the second limiting ring 21;

[0037] The purpose is to place the upper knife connecting piece 3 into the dough mixing ring 4 from bottom to top, so that the elastic strip 18 passes upward through the avoidance groove 22, and the upper side of the first limiting ring 17 abuts against the lower side of the second limiting ring 21. Then rotate the upper knife connecting piece 3 so that the lower side of the elastic strip 18 abuts against the upper side of the second limiting ring 21, and drive the first protrusion 19 to be clamped in one of the first grooves 20 through the elastic force of the elastic strip 18 to form a fixation, improving the connection stability between the upper knife connecting piece 3 and the dough mixing ring 4, and facilitating the disassembly of the upper knife connecting piece 3 and the dough mixing ring 4, facilitating the replacement of parts of the upper knife connecting piece 3 or the dough mixing ring 4, without the need for overall replacement, reducing the use cost.

[0038] In order to facilitate the connection or disassembly between the upper knife connecting piece 3 and the upper knife grinding head 2, in this embodiment, preferably, a top ring 23 is connected to the top of the upper knife grinding head 2, an entry groove 24 is provided at the bottom of the outer side of the top ring 23, a limiting groove 25 is communicated with one side of the entry groove 24, a limiting block 26 is provided inside the upper knife connecting piece 3, the limiting block 26 is movably inserted into the limiting groove 25, a second protrusion 27 is provided in the limiting groove 25, and a second groove 28 is provided on the outer side of the limiting block 26, and the second protrusion 27 is movably clamped in the second groove 28;

[0039] The purpose is to place the upper knife grinding head 2 into the upper knife connecting piece 3 from top to bottom, so that the limiting block 26 enters the entry groove 24, and then rotate the upper knife grinding head 2 so that the limiting block 26 moves from the entry groove 24 to the limiting groove 25, and the second protrusion 27 is clamped in the second groove 28 to form a fixation, improving the connection stability between the upper knife connecting piece 3 and the upper knife grinding head 2, and facilitating the disassembly of the upper knife connecting piece 3 and the upper knife grinding head 2, facilitating the replacement of parts of the upper knife connecting piece 3 or the upper knife grinding head 2, without the need for overall replacement, reducing the use cost.

[0040] In order to facilitate lifting the upper knife grinding head 2 or rotating the upper knife grinding head 2, in this embodiment, preferably, an arc-shaped handle 34 is further included, and both ends of the arc-shaped handle 34 are rotatably connected to the inner side of the top ring 23;

[0041] The purpose is to facilitate rotating the upper knife grinding head 2 through the arc-shaped handle 34, and facilitate lifting and removing the upper knife grinding head 2 from the upper knife connecting piece 3.

[0042] In order to facilitate improving the sealing effect, in this embodiment, preferably, a sealing cover (not shown in the figure) is detachably connected to the top of the upper knife connecting piece 3.

[0043] In order to facilitate automatically driving the lower knife grinding head 5 to rotate, in this embodiment, preferably, a motor 29 is further included, and the output shaft of the motor 29 passes upward through the grinding chamber 6 and is connected to the lower knife grinding head 5.

[0044] To facilitate the installation and disassembly of the lower grinding head 5, in this embodiment, preferably, a bean dialing piece 35 and a powder dialing piece 36 are respectively abutted against the upper and lower sides of the lower grinding head 5. The bean dialing piece 35 and the powder dialing piece 36 are both movably clamped on the output shaft of the motor 29. A gasket 37 is abutted against the upper side of the bean dialing piece 35. The top of the output shaft of the motor 29 sequentially passes through the powder dialing piece 36, the lower grinding head 5, the bean dialing piece 35, and the gasket 37 and is threadedly connected with a nut 38. The lower side of the nut 38 abuts against the gasket 37. The top of the powder dialing piece 36 is connected with a convex shaft 39. A third groove (not shown in the figure) is provided at the bottom of the lower grinding head 5. The convex shaft 39 is movably inserted into the third groove. After the nut 38 is rotated and removed, the gasket 37, the bean dialing piece 35, the lower grinding head 5, and the powder dialing piece 36 can be quickly disassembled in sequence. Conversely, quick installation can be achieved, improving the convenience of the installation and disassembly of the lower grinding head 5. During use, the bean dialing piece 35 can be used to dial the bean material, making the feeding of the bean material smoother. At the same time, the powder dialing piece 36 can be used to dial the ground powder and discharge it from the powder outlet channel 31, improving the smoothness of the powder discharge.

[0045] To facilitate increasing the torque, reducing the impact of the load on the motor 29, avoiding overload damage, and extending the service life of the motor 29, in this embodiment, preferably, a reduction gearbox 30 is further included. The output shaft of the motor 29 is connected to the input end of the reduction gearbox 30. The output shaft of the reduction gearbox 30 passes upward through the grinding chamber 6 and is connected to the lower grinding head 5.

[0046] To facilitate the grinding powder discharge, in this embodiment, preferably, a powder outlet channel 31 is communicated and provided on one side of the grinding chamber 6. The powder outlet channel 31 penetrates through the avoidance opening 8.

[0047] To facilitate improving the anti-slip effect of the manual rotation of the powder adjusting ring 4 and the zero-adjusting positioning ring 7, in this embodiment, preferably, a plurality of first anti-slip protrusions 32 are arranged in a circular array on the outer side of the powder adjusting ring 4, and a plurality of second anti-slip protrusions 33 are arranged in a circular array on the outer side of the zero-adjusting positioning ring 7.

[0048] The working principle and usage process of the present utility model: In the later stage of production of the grinder, by manually rotating the powder adjusting ring 4 from the avoidance opening 8, the powder adjusting ring 4 drives the upper grinding head 2 to move downward through the upper tool connecting member 3, so that the upper grinding head 2 touches the lower grinding head 5. After touching, rotate the powder adjusting ring 4 in the reverse direction to make the upper grinding head 2 move upward and callback a distance of 75 microns, and set the current position as the use zero position, that is, the preset gap of the tool distance of 75 microns (the specific callback distance is set according to the actual situation) is the use zero position. Then rotate the zero-adjusting positioning ring 7 to make the upper end surface of the zero-adjusting positioning ring 7 abut against the lower end surface of the upper tool connecting member 3, achieving the effect of positioning the use zero position of the upper tool connecting member 3, realizing tolerance compensation, improving the tool distance control accuracy, and reducing the production cost;

[0049] Then remove the flour mixing ring 4 together with the upper knife connecting piece 3 and the upper knife grinding head 2. Use the first screw 9 to engage from the screw hole 11 above the zeroing positioning ring 7 into one of the card slots 10 at the top of the grinding bin 6. By engaging the first screw 9 in the card slot 10, the zeroing positioning ring 7 cannot rotate, thereby achieving the effect of locking and using the zero position, improving the structural stability. Finally, reinstall the flour mixing ring 4 together with the upper knife connecting piece 3 and the upper knife grinding head 2.

[0050] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-precision grinder, comprising a housing (1), characterized in that: The machine tool further comprises an upper grinding head (2), an upper knife connecting member (3), a powder adjusting ring (4), a lower grinding head (5), a grinding chamber (6) and a zeroing positioning ring (7), wherein the upper grinding head (2) is fixedly connected to the inner side of the upper knife connecting member (3), the upper knife connecting member (3) is fixedly connected to the inner side of the powder adjusting ring (4), the powder adjusting ring (4) is connected to the top of the housing (1) by threaded engagement, the lower grinding head (5) is rotatably arranged in the grinding chamber (6), the grinding chamber (6) is fixedly connected to the inner side of the housing (1), the zeroing positioning ring (7) is connected to the top of the grinding chamber (6) by threaded engagement, and an avoidance opening (8) is provided on the housing (1), the avoidance opening (8) is arranged on the outer side of the zeroing positioning ring (7), and the upper side of the zeroing positioning ring (7) is movably abutted against the lower side of the upper knife connecting member (3).

2. The high-precision grinder according to claim 1, characterized in that: The invention also comprises a first screw (9), a plurality of slots (10) are arranged in a circular array on the top of the grinding chamber (6), a screw hole (11) is provided on the top of the zero adjustment positioning ring (7), the first screw (9) is connected to the screw hole (11) by threaded engagement, and the first screw (9) is inserted downward through the screw hole (11) and then is engaged in one of the slots (10).

3. The high-precision grinder according to claim 1 or 2, characterized in that: It also includes a zero adjustment positioning pin (12), the zero adjustment positioning pin (12) is connected to a first stud (13), a plurality of second studs (14) are evenly arranged on the outer side of the housing (1), a through hole (15) is provided on one side of the second stud (14), and the second stud (14) is connected to the first stud (13) via a second screw, a positioning bone (16) is connected to the bottom of the powder adjustment ring (4), the zero adjustment positioning pin (12) is movably inserted into the through hole (15), and one side of the zero adjustment positioning pin (12) is movably abutted against one side of the positioning bone (16) after passing through the through hole (15).

4. The high-precision grinder according to claim 1, characterized in that: The outer side of the upper knife connecting member (3) is provided with a first limiting ring (17) and an elastic strip (18), the elastic strip (18) is arranged above the first limiting ring (17), and a first protrusion (19) is connected to a side of the elastic strip (18) away from the upper knife connecting member (3), the inner side of the powder mixing ring (4) is provided with a first groove (20) and a second limiting ring (21), the first groove (20) is arranged above the second limiting ring (21), and a plurality of the first grooves (20) are arranged in a ring array, the first protrusion (19) is movably engaged in one of the first grooves (20), the upper side of the first limiting ring (17) is movably abutted against the lower side of the second limiting ring (21), the lower side of the elastic strip (18) is movably abutted against the upper side of the second limiting ring (21), and the second limiting ring (21) is provided with an avoidance groove (22) for the elastic strip (18) to pass through.

5. The high-precision grinder according to claim 1, characterized in that: The top of the upper sharpening head (2) is connected to a top ring (23), an entry groove (24) is provided at the outer bottom of the top ring (23), a limiting groove (25) is provided on one side of the entry groove (24), a limiting block (26) is provided on the inner side of the upper knife connecting member (3), the limiting block (26) is movably inserted into the limiting groove (25), a second protrusion (27) is provided in the limiting groove (25), a second groove (28) is provided on the outer side of the limiting block (26), and the second protrusion (27) is movably engaged in the second groove (28).

6. The high-precision grinder according to claim 1, characterized in that: The top of the upper knife connecting piece (3) is detachably connected to a sealing cover.

7. The high-precision grinder according to claim 1, characterized in that: It also includes a motor (29), wherein the output shaft of the motor (29) passes through the grinding chamber (6) upwards and is connected to the lower grinding head (5).

8. The high-precision grinder according to claim 7, characterized in that: It also includes a reduction gear box (30), wherein the output shaft of the motor (29) is connected to the input end of the reduction gear box (30), and the output shaft of the reduction gear box (30) passes through the grinding chamber (6) upwards and is connected to the lower grinding head (5).

9. The high-precision grinder according to claim 1, characterized in that: A powder outlet channel (31) is provided on one side of the grinding bin (6), and the powder outlet channel (31) passes through the avoidance opening (8).

10. The high-precision grinder according to claim 1, characterized in that: A plurality of first anti-skid protrusions (32) are arranged in a ring array on the outside of the powder adjustment ring (4), and a plurality of second anti-skid protrusions (33) are arranged in a ring array on the outside of the zero adjustment positioning ring (7).

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