Grinding cutter and device with grinding function

Abstract

The utility model discloses a device with a grinding function, which comprises a grinding cutter matched with a lower cutter head for grinding, the grinding cutter comprises an outer support and a grinding piece, the grinding piece is provided with a spiral groove, the outer support is provided with a sliding block, the sliding block moves along the spiral groove to enable the outer support to move axially when the outer support rotates, and a limiting block is arranged on the outer support. The grinding piece is provided with a limiting part matched with the limiting block to limit rotation of the outer support, the outer support comprises an upper layer frame and a lower layer frame which define a containing hole, and the limiting block is matched with the containing hole in a clamped mode. The spiral groove is formed in the grinding piece, the sliding block is arranged on the outer support, the outer support can move in the axial direction when rotating relative to the grinding piece, and therefore when a grinding cutter is abraded, the distance between the grinding piece and the lower cutter head can be adjusted by rotating the outer support to conduct movement compensation. Meanwhile, through the upper-layer frame and the lower-layer frame which are detachably and fixedly connected to define the accommodating hole and the limiting block which is clamped and matched with the accommodating hole, the limiting block and the outer bracket are stably assembled and are not easy to fall off.

Description

Technical Field

[0001] The utility model relates to the technical field of small household appliances, in particular to a grinding tool and a device with a grinding function. Background Art

[0002] A fully automatic coffee machine is a coffee machine that can automatically grind and brew coffee, and is very popular. The known fully automatic coffee machine includes a machine base with a grinding chamber and a grinding tool disposed in the grinding chamber, wherein the grinding tool includes a lower tool and an upper tool, and the upper tool is threadedly connected to the machine base. When the upper tool rotates relative to the machine base, it approaches or moves away from the lower tool, thereby adjusting the distance between the upper tool and the lower tool, and grinding coffee powder of different coarseness and fineness to meet user needs. However, after a period of use, the upper and lower tools will wear out, and the distance between the upper and lower tools will increase, resulting in the inability to accurately grind coffee powder that meets user needs. Utility Model Content

[0003] The utility model aims to provide a grinding tool to solve the problem that the grinding tool of the existing coffee machine wears out after being used for a period of time, resulting in a larger distance between the upper and lower tools and inability to grind accurately.

[0004] The utility model is realized by the following technical solutions:

[0005] The grinding tool comprises an outer bracket and a grinding piece rotatably connected to the outer bracket, the grinding piece having a spiral groove, and the outer bracket having a slider slidably matched with the spiral groove. When the outer bracket rotates relative to the grinding piece, the slider moves along the spiral groove to make the outer bracket move axially relative to the grinding piece. The outer bracket is provided with a limit block that can move along its axial direction, and the grinding piece is provided with a limit portion for cooperating with the limit block to limit the rotation of the outer bracket. The outer bracket comprises an upper frame and a lower frame that are detachably fixedly connected, the upper frame and the lower frame together form a receiving hole for accommodating the limit block, and the limit block has a clamping portion that clamps with the receiving hole to limit the limit block from moving away from the receiving hole.

[0006] Furthermore, the receiving hole has a side opening located on the circumferential side wall of the outer bracket, and the clamping portion extends out of the receiving hole from the side opening and is clamped and matched with the receiving hole at the side opening.

[0007] Furthermore, the outer bracket is provided with a clearance notch on the upper side of the side opening for the clamping portion to move into.

[0008] Furthermore, an elastic member for driving the limit block to move into the limit portion is provided in the accommodating hole, and the limit block has a positioning countersunk hole for inserting the elastic member; the limit block has a plurality of plug posts arranged side by side in the circumferential direction of the outer bracket, and the elastic members are in a plurality and correspond one-to-one with the plurality of plug posts, and each of the plug posts is provided with a positioning countersunk hole for inserting the corresponding elastic member.

[0009] Furthermore, the limiting portion is composed of a plurality of limiting countersunk holes arranged at intervals in the circumferential direction of the grinding piece.

[0010] Furthermore, the outer wall of the upper frame is provided with a plurality of upper connecting ears spaced apart in its circumferential direction, the outer wall of the lower frame is provided with lower connecting ears corresponding one to one with the plurality of upper connecting ears, and each of the upper connecting ears is provided with a fastener connected to the corresponding lower connecting ear.

[0011] Furthermore, the grinding part includes an inner bracket, a grade adjustment ring and a cutter disc, the inner bracket has an axial extension portion and a radial flange extending around the outer periphery of the axial extension portion, the grade adjustment ring is arranged outside the inner bracket and is detachably fixedly connected to the cutter disc to form an assembly groove for the radial flange to be embedded, and the outer bracket has an assembly hole for the axial extension portion to be inserted.

[0012] Furthermore, the inner bracket is provided with a positioning groove on its outer wall, and the grade adjustment ring has a positioning block which is plugged into and cooperates with the positioning groove to limit the rotation of the inner bracket; the positioning grooves and the positioning blocks are both multiple and correspond to each other one by one, the limiting portion is provided on the grade adjustment ring and is located between two adjacent positioning blocks, and among the multiple positioning blocks, the positioning blocks located on both sides of the limiting portion have inconsistent extension lengths in the circumferential direction of the grade adjustment ring, and the remaining positioning blocks and the positioning blocks on one side of the limiting portion have consistent extension lengths in the circumferential direction of the grade adjustment ring.

[0013] Furthermore, a sealing ring groove is provided on the outer peripheral wall of the grade adjustment ring, a sealing strip is embedded in the sealing ring groove, the cutter disc is coaxially arranged with the grade adjustment ring, and the outer diameter of the cutter disc is smaller than the outer diameter of the grade adjustment ring.

[0014] In order to solve the problem that the limit block constituting the locking structure in the existing grinding tool is directly installed into or detached from the outer bracket through the insertion hole at the bottom of the outer bracket, the assembly is unstable and it is easy to fall off, the utility model provides a grinding tool, and accordingly, provides a device with a grinding function, including a body with a grinding chamber and a lower cutter disc arranged in the grinding chamber, characterized in that the body is provided with the above-mentioned grinding tool above the lower cutter disc, the grinding tool moves along the body to approach or move away from the lower cutter disc, the body has a powder receiving space connected with the grinding chamber through a powder falling channel, and the body is provided with a card interface on one side of the powder receiving space.

[0015] The advantages of this technical solution are:

[0016] 1. By configuring a spiral groove on the grinding piece and a slider on the outer bracket, the outer bracket can move relative to the grinding piece in the axial direction when it rotates relative to the grinding piece. Therefore, when the grinding tool is worn, the distance between the grinding piece and the lower cutter disc can be adjusted by rotating the outer bracket to compensate for the movement, thereby achieving precise grinding. At the same time, the adjustable range of the distance between the lower cutter disc and the grinding tool is wider and finer.

[0017] 2. The outer bracket is configured as an upper frame and a lower frame that are detachably fixedly connected to enclose a receiving hole, and a limit block having a snap-fitting portion that snaps into the receiving hole is configured in the receiving hole, so that the limit block that cooperates with the limit portion to limit the rotation of the outer bracket is stably assembled with the outer bracket and is not easy to fall off. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0020] Figure 1 is a three-dimensional diagram of a device with a grinding function disclosed in an embodiment;

[0021] Figure 2 is an exploded view of a device with a grinding function disclosed in an embodiment;

[0022] Figure 3 is a three-dimensional diagram of a grinding tool in an embodiment;

[0023] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0024] Figure 5 is an exploded view of the grinding tool in the embodiment;

[0025] Figure 6 is a cross-sectional view of a grinding tool in an embodiment;

[0026] Figure 7 yes Figure 6 A partial enlarged view of point B in the middle;

[0027] Figure 8 is a three-dimensional diagram of the grinding member in the embodiment;

[0028] Fig. 9 is an exploded view of the grinding member in the embodiment;

[0029] Fig.10 3D is a three-dimensional diagram of the limiting block in the embodiment. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Example: Figure 1-10As shown, the device with grinding function includes a body 1 with a grinding chamber 101 and a lower cutter disc 2 arranged in the grinding chamber 101. The body 1 is provided with a grinding tool 3 above the lower cutter disc 2. The grinding tool 3 can move along the body 1 to approach or away from the lower cutter disc 2. The grinding tool 3 includes an outer bracket 301 and a grinding member 302 rotatably connected to the outer bracket 30. The grinding member 302 has a spiral groove 330. The outer bracket 30 has a slider 331 that slidably cooperates with the spiral groove 330. When the outer bracket 301 rotates relative to the grinding member 302, the slider 331 moves along the spiral groove 330 to make the outer bracket 301 rotate. The frame 301 moves axially relative to the grinding piece 302. The outer bracket 301 is provided with a limit block 300 that can move along its axial direction. The grinding piece 302 is provided with a limit portion 303 for plugging and cooperating with the limit block 300 to limit the rotation of the outer bracket 301. The outer bracket 301 includes an upper frame 304 and a lower frame 305 that are detachably fixedly connected. The upper frame 304 and the lower frame 305 together form a receiving hole 306 for accommodating the limit block 300. The limit block 300 has a clamping portion 325 that is clamped and cooperated with the receiving hole 306 to limit the limit block 300 from moving away from the receiving hole 306. The utility model provides a grinding tool to solve the problem that the grinding tool of the existing coffee machine wears out after being used for a period of time, resulting in a larger distance between the upper and lower tools and inability to grind accurately. The utility model mainly configures a spiral groove 330 on the grinding piece 302 and a slider 331 on the outer bracket 30, so that the outer bracket 301 can move relative to the grinding piece 302 in the axial direction when rotating relative to the grinding piece 302. Therefore, when the grinding tool 3 is worn, the distance between the grinding piece 302 and the lower cutter disc 2 can be adjusted by rotating the outer bracket 301. The distance can be moved and compensated to achieve precise grinding, and at the same time, the adjustable range of the distance between the lower cutter disc 2 and the grinding tool 3 is wider and finer; at the same time, the outer bracket 301 is configured to be a detachable upper frame 304 and a lower frame 305 that are fixedly connected to form a receiving hole 306, and a limit block 300 with a clamping portion 325 that is clamped with the receiving hole 306 is configured in the receiving hole 306, so that the limit block 300 that cooperates with the limit portion 303 to limit the rotation of the outer bracket 301 is stably assembled with the outer bracket 301 and is not easy to fall off.

[0032] In the embodiment of the utility model, the accommodating hole 306 has a side opening 307 located on the circumferential side wall of the outer bracket 301, and the clamping portion 325 extends out of the accommodating hole 306 from the side opening 307 and is clamped and matched with the accommodating hole 306 at the side opening 307. Since the accommodating hole 306 has a side opening 307, the clamping portion 325 is clamped and matched with the accommodating hole 306 at the side opening 307 and extends out of the accommodating hole 306 at the side opening 307, so that the clamping portion 325 and the accommodating hole 306 are clamped and matched to limit the limit block 300 from moving away from the outer bracket 301, so that the limit block 300 has good assembly stability, and the user can move the limit block 300 through the clamping portion 325, and the operation is convenient and simple.

[0033] In the embodiment of the utility model, the outer bracket 301 is provided with a clearance notch 308 for the clamping portion 325 to move into on the upper side of the side opening 307. Since the outer bracket 301 is provided with a clearance notch 308 for the clamping portion 325 to move into on the upper side of the side opening 307, the moving stroke of the limit block 300 is extended, so that the limit block 300 is convenient to move away from the limit portion 303.

[0034] In the embodiment of the utility model, an elastic member 326 for driving the limit block 300 to move into the limit portion 303 is provided in the receiving hole 306, and the limit block 300 has a positioning countersunk hole 327 for inserting the elastic member 326. Specifically, the elastic member 326 is a spring. Since the limit block 300 is driven to move into the limit portion 303 by the elastic member 326 provided in the receiving hole 306, the overall structure is compact and simple while the limit block 300 is driven. In addition, since the limit block 300 has a positioning countersunk hole 327 for inserting the elastic member 326, the assembly of the elastic member 326 and the limit block 300 is stable, not easy to shift, and has good driving.

[0035] In the embodiment of the utility model, the limit block 300 has a plurality of plug posts 328 arranged side by side in the circumferential direction of the outer bracket 301, there are a plurality of elastic members 326 corresponding to the plurality of plug posts 328, each plug post 328 is provided with a positioning countersunk hole 327 for the corresponding elastic member 326 to be inserted, and the clamping portion 325 is symmetrically arranged about the plurality of plug posts 328. Since the limit block 300 has a plurality of plug posts 328 arranged side by side in the circumferential direction of the outer bracket 301, the limit block 300 has a good locking effect when inserted into the limit portion 303. Since the elastic members 326 correspond to the plurality of plug posts 328 one by one and are inserted into the corresponding plug posts 328, each plug post 328 is subjected to uniform force and has good synchronization of movement.

[0036] In the embodiment of the utility model, the position limiting part 303 is composed of a plurality of position limiting countersunk holes 309 arranged at intervals in the circumferential direction of the grinding member 302. When the outer bracket 301 rotates relative to the grinding member 302, each plug post 328 moves from one position limiting countersunk hole 309 to another adjacent position limiting countersunk hole 309. Since the position limiting part 303 is composed of a plurality of position limiting countersunk holes 309 arranged at intervals in the circumferential direction of the grinding member 302, the grinding tool 3 can be adjusted in multiple stages with high adjustment accuracy.

[0037] In the embodiment of the utility model, the outer wall of the upper frame 304 is provided with a plurality of upper connecting ears 310 arranged at intervals in the circumferential direction thereof, and the outer wall of the lower frame 305 is provided with lower connecting ears 311 corresponding to the plurality of upper connecting ears 310 one by one, and each upper connecting ear 310 is provided with a fastener 329 connected to the corresponding lower connecting ear 311. Specifically, the fastener 329 is a bolt. Since the upper / lower frame is detachably fixedly connected by the upper connecting ears 310, the lower connecting ears 311 and the fastener 329, it has the advantages of convenient connection and simple assembly and disassembly.

[0038] In the embodiment of the utility model, the grinding member 302 includes an inner bracket 312, a grade adjustment ring 313 and a cutter disc 314. The inner bracket 312 has an axial extension portion 315 and a radial flange 316 extending around the outer periphery of the axial extension portion 315. The grade adjustment ring 313 is arranged outside the inner bracket 312 and encloses with the cutter disc 314 to form an assembly groove 317 for the radial flange 316 to be embedded. The grade adjustment ring 313 is detachably fixedly connected to the cutter disc 314, and the outer bracket 301 has an assembly hole 318 for the axial extension portion 315 to be inserted. Among them, the inner bracket 312 is made of plastic material, and the grade adjustment ring 313 and the cutter disc 314 are made of metal material. Since the grade adjustment ring 313 and the cutter disc 314 are detachably fixedly connected and enclosed to form an assembly groove 317 for the radial flange 316 of the inner bracket 312 to be embedded, it is possible to avoid damage to the inner bracket 312 made of plastic material during the assembly process, and the assembly structure is reasonable and simple.

[0039] In the embodiment of the utility model, the outer wall of the inner bracket 312 is provided with a spiral groove 330, and the inner wall of the assembly hole 318 is provided with a slider 331 that slidably cooperates with the spiral groove 330. The spiral groove 330 extends around the axis of the inner bracket 312 in the axial direction of the inner bracket 312. When the outer bracket 301 rotates relative to the grinding member 302, the slider 331 moves along the spiral groove 330 to make the outer bracket 301 move relative to the grinding member 302 in the axial direction of the grinding member 302. Since the outer wall of the inner bracket 312 is provided with a spiral groove 330, and the inner wall of the assembly hole 318 is provided with a slider 331 that moves along the spiral groove 330 when the outer bracket 301 rotates to make the outer bracket 301 move relative to the grinding member 302 in the axial direction of the grinding member 302, the grinding member 302 can move in the axial direction of the outer bracket 301 when it rotates, and the structure is simple and easy to implement.

[0040] In the embodiment of the utility model, the inner bracket 312 is provided with a positioning groove 319 on its outer wall, and the level adjustment ring 313 has a positioning block 320 that is plugged into the positioning groove 319 to limit the rotation of the inner bracket 312. Since the inner bracket 312 has the positioning groove 319 and the level adjustment ring 313 has the positioning block 320 that is plugged into the positioning groove 319, the rotation of the inner bracket 312 relative to the level adjustment ring 313 can be limited, thereby improving the stability of the assembly.

[0041] In the embodiment of the utility model, there are several positioning grooves 319 and positioning blocks 320, and they correspond one to one. The limiting part 303 is arranged on the level adjustment ring 313 and is located between two adjacent positioning blocks 320. Among the several positioning blocks 320, the positioning blocks 320 located on both sides of the limiting part 303 have different extension lengths in the circumferential direction of the level adjustment ring 313, and the remaining positioning blocks 320 and the positioning blocks 320 on one side of the limiting part 303 have the same extension lengths in the circumferential direction of the level adjustment ring 313. Since the positioning blocks 320 located on both sides of the limiting part 303 have different extension lengths in the circumferential direction of the level adjustment ring 313, and the remaining positioning blocks 320 and the positioning blocks 320 on one side of the limiting part 303 have the same extension lengths in the circumferential direction of the level adjustment ring 313, it can effectively avoid mis-assembly and improve assembly efficiency.

[0042] In the embodiment of the utility model, a sealing ring groove 321 is provided on the outer peripheral wall of the level adjustment ring 313, and a sealing strip 322 is embedded in the sealing ring groove 321. Since the sealing ring groove 321 is provided on the outer peripheral wall of the level adjustment ring 313, and the sealing strip 322 is embedded in the sealing ring groove 321, the assembly of the grinding tool 3 and the body 1 has good sealing performance, and powder overflow is prevented.

[0043] In the embodiment of the utility model, the cutter disc 314 is coaxially arranged with the grade adjustment ring 313, and the outer diameter of the cutter disc 314 is smaller than the outer diameter of the grade adjustment ring 313. The grade adjustment ring 313 is coaxially arranged with the outer bracket 301, and the two outer diameters are the same. Since the cutter disc 314 is coaxially arranged with the grade adjustment ring 313, and the outer diameter of the cutter disc 314 is smaller than the outer diameter of the grade adjustment ring 313, when the grinding tool 3 is assembled with the machine body 1, the grade adjustment ring 313 is partially abutted against the machine body 1, thereby improving the stability of the assembly.

[0044] In the embodiment of the utility model, the bottom surface of the level adjustment ring 313 is provided with an annular groove 323, and the top of the cutter disc 314 has an annular portion 324 that fits in the annular groove 323. Since the level adjustment ring 313 is provided with an annular groove 323 and the cutter disc 314 has an annular portion 324 that fits in the annular groove 323, the level adjustment ring 313 and the cutter disc 314 are assembled stably.

[0045] In the embodiment of the utility model, the body 1 has a powder receiving space 103 connected to the grinding chamber 101 through a powder dropping channel 102, and the body 1 is provided with a card interface 104 on one side of the powder receiving space 103. The card interface 104 is used to engage with the card seat of the supporting container. The above arrangement allows the device with a grinding function to be connected with related accessories when receiving powder, thereby improving the convenience of use.

[0046] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center of a circle", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships 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 device or element referred to 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.

[0047] As described above, one or more implementation methods are provided in combination with specific contents, and the specific implementation of the utility model is not limited to these descriptions. Any method, structure, etc. similar to or identical to the method, structure, etc. of the utility model, or some technical deductions or replacements made on the premise of the concept of the utility model should be regarded as the protection of the utility model.

Claims

1. A grinding tool, comprising an outer bracket and a grinding member rotatably connected to the outer bracket, characterized in that: The grinding piece has a spiral groove, and the outer bracket has a slider that slidably cooperates with the spiral groove. When the outer bracket rotates relative to the grinding piece, the slider moves along the spiral groove to make the outer bracket move axially relative to the grinding piece. The outer bracket is provided with a limit block that can move along its axial direction, and the grinding piece is provided with a limit portion for cooperating with the limit block to limit the rotation of the outer bracket. The outer bracket includes an upper frame and a lower frame that are detachably fixedly connected, and the upper frame and the lower frame together form a receiving hole for accommodating the limit block, and the limit block has a clamping portion that clamps with the receiving hole to limit the limit block from moving away from the receiving hole.

2. The grinding tool according to claim 1, characterized in that: The receiving hole has a side opening located on the circumferential side wall of the outer bracket, and the clamping portion extends out of the receiving hole from the side opening and is clamped and matched with the receiving hole at the side opening.

3. The grinding tool according to claim 2, characterized in that: The outer bracket is provided with a clearance notch on the upper side of the side opening for the clamping part to move into.

4. The grinding tool according to claim 1, characterized in that: An elastic member for driving the limit block to move into the limit portion is arranged in the accommodating hole, and the limit block has a positioning countersunk hole for the elastic member to be inserted into; The limit block has a plurality of plug posts arranged side by side in the circumferential direction of the outer bracket, the elastic members are in a plurality and correspond one to one with the plurality of plug posts, and each of the plug posts is provided with a positioning countersunk hole for the corresponding elastic member to be inserted.

5. The grinding tool according to claim 1, characterized in that: The limiting portion is composed of a plurality of limiting countersunk holes spaced apart in the circumferential direction of the grinding piece.

6. The grinding tool according to claim 1, characterized in that: The outer wall of the upper frame is provided with a plurality of upper connecting ears spaced apart in the circumferential direction thereof, and the outer wall of the lower frame is provided with lower connecting ears corresponding to the plurality of upper connecting ears one by one, and each of the upper connecting ears is provided with a fastener connected to the corresponding lower connecting ear.

7. The grinding tool according to claim 1, characterized in that: The grinding part includes an inner bracket, a grade adjustment ring and a cutter disc. The inner bracket has an axial extension portion and a radial flange extending around the outer periphery of the axial extension portion. The grade adjustment ring is arranged outside the inner bracket and is detachably fixedly connected to the cutter disc to form an assembly groove for the radial flange to be embedded. The outer bracket has an assembly hole for the axial extension portion to be inserted.

8. The grinding tool according to claim 7, characterized in that: The inner bracket is provided with a positioning groove on its outer wall, and the level adjustment ring has a positioning block which is plugged into and matched with the positioning groove to limit the rotation of the inner bracket; There are several positioning grooves and positioning blocks in one-to-one correspondence. The limiting portion is arranged on the grade adjustment ring and is located between two adjacent positioning blocks. Among the several positioning blocks, the positioning blocks located on both sides of the limiting portion have inconsistent extension lengths in the circumferential direction of the grade adjustment ring, while the remaining positioning blocks and the positioning blocks on one side of the limiting portion have consistent extension lengths in the circumferential direction of the grade adjustment ring.

9. The grinding tool according to claim 7, characterized in that: A sealing ring groove is provided on the outer peripheral wall of the grade adjustment ring, a sealing strip is embedded in the sealing ring groove, the cutter disc is coaxially arranged with the grade adjustment ring, and the outer diameter of the cutter disc is smaller than the outer diameter of the grade adjustment ring; And / or the outer wall of the inner bracket is provided with the spiral groove, the inner wall of the assembly hole is provided with the slider that slides with the spiral groove, the spiral groove extends around the axis of the inner bracket in the axial direction of the inner bracket, and when the outer bracket rotates relative to the grinding member, the slider moves along the spiral groove to make the outer bracket move relative to the grinding member in the axial direction of the grinding member.

10. A device with a grinding function, comprising a body having a grinding chamber and a lower cutter disc arranged in the grinding chamber, characterized in that: The machine body is provided with a grinding tool as claimed in any one of claims 1 to 9 above the lower cutter disc, and the grinding tool moves along the machine body toward or away from the lower cutter disc; The machine body has a powder receiving space which is connected with the grinding chamber through a powder dropping channel, and the machine body is provided with a card interface at one side of the powder receiving space.

Images