Efficient matcha powder grinding device

Abstract

The utility model belongs to the technical field of grinding devices, and discloses an efficient matcha powder grinding device which comprises a shell, a supporting column fixed to the bottom of the shell, a feeding hopper fixed to and communicated with the side wall of the shell and a grinding disc arranged in the shell. A discharging port is formed in the bottom of the shell, a filtering plate is arranged in the discharging port, a grinding area matched with the bottom of the grinding disc is arranged at the bottom in the shell, and a notch is formed in the side wall of the grinding disc. Through the arrangement of the notches, matcha raw materials clamped between the edge of the grinding disc and the inner wall of the shell can enter the space between the edge of the grinding disc and the grinding area to be ground, and the grinding efficiency and the grinding effect of matcha powder are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to grinding device technical field, especially in a kind of high-efficiency grinding device of matcha powder. BACKGROUND

[0002] Matcha powder is made of sunshade tea as raw material, then it is ground into ultra-fine powder by matcha grinding machine, and matcha powder contains rich nutrients and trace elements needed by human body, and matcha powder is usually made of natural stone mill into micro-powder steamed green tea.

[0003] In the Chinese utility model patent with publication number CN220835843U, a kind of high-efficiency grinding device of matcha powder is disclosed, related to matcha processing technical field, including device body, also including grinding mechanism, the device body includes fixed shell, the top of the fixed shell is provided with cover plate, the top of the cover plate is fixedly installed with feed hopper, the bottom inner wall of the fixed shell is provided with discharge port, the grinding mechanism includes two electric screw rods, two electric screw rods outside are equipped with grinding roller, the bottom of the grinding roller is equipped with grinding plate, the bottom outer side of the grinding plate is installed with three cleaning plates.

[0004] For the related technology in the above, the inventor believes that the following defects exist: when the above grinding device is used for grinding matcha raw materials, the rotating grinding plate cooperates with the relatively fixed grinding roller and grinds matcha raw materials, the raw materials enter the fixed shell from the feed hopper, when there are more materials, since the grinding roller is in a fixed state, when the gap between the side wall of the grinding roller and the inner wall of the fixed shell is small, the raw materials are easily stuck in the gap between the side wall of the grinding roller and the inner wall of the fixed shell, when the gap between the side wall of the grinding roller and the inner wall of the fixed shell is large, the effective grinding area of the bottom of the grinding roller is reduced, in order to effectively improve the grinding efficiency and effect of matcha raw materials, it is necessary to improve the related technology. UTILITY MODEL CONTENTS

[0005] In order to solve the above problems, the utility model provides a kind of high-efficiency grinding device of matcha powder.

[0006] The above technical purpose of the utility model is realized by the following technical scheme: a kind of high-efficiency grinding device of matcha powder, including shell, the support fixed in the bottom of shell, with the feed hopper of fixed communication of shell side wall and the grinding disc setting in shell, the shell is provided with the drive assembly for driving grinding disc rotation, the discharge port is set in the bottom of shell, the filter plate is set in the discharge port, the grinding area that cooperates with the bottom of grinding disc is set in the bottom of shell, the side wall of grinding disc is provided with gap.

[0007] By adopting the technical scheme, the grinding disc rotates under the driving action of the driving assembly, the grinding disc cooperates with the grinding area and grinds the matcha raw materials entering the inside of the shell from the feeding hopper, the matcha powder with a fineness less than the aperture of the filter plate falls off and is collected by the collecting box below the shell. The setting of the gap is conducive to the matcha raw materials stuck between the edge of the grinding disc and the inner wall of the shell entering between the edge of the grinding disc and the grinding area and being ground, thereby improving the grinding efficiency and grinding effect of the matcha powder.

[0008] Further, the distance between the gap and the axis of the grinding disc decreases from top to bottom.

[0009] By adopting the technical scheme, the probability of the matcha raw materials being stuck between the gap and the inner wall of the shell is reduced.

[0010] Further, an arc-shaped part is arranged at the intersection between the gap and the grinding disc.

[0011] By adopting the technical scheme, the setting of the arc-shaped part reduces the sharp edges and corners on the grinding disc, and facilitates the matcha raw materials entering the gap to enter between the edge of the grinding disc and the inner wall of the shell for grinding.

[0012] Further, the top and bottom of the grinding disc are in the shape of a circular truncated cone, and the cross-sectional area of the grinding disc decreases from the middle part of the grinding disc to the upper and lower sides.

[0013] By adopting the technical scheme, the probability of the matcha raw materials being stuck on the top of the grinding disc is reduced, and after the grinding disc cooperates with the grinding area to grind the matcha powder, the matcha powder falls off from the small holes on the filter plate.

[0014] Further, the bottom of the grinding disc is fixed with a plurality of inclined grinding strips uniformly distributed on the arc surface of the bottom of the grinding disc, the bottom of the grinding disc is further fixed with a plurality of horizontal grinding strips uniformly distributed on the plane of the bottom of the grinding disc, and the center of the grinding disc is further fixed with a plurality of grinding balls.

[0015] By adopting the technical scheme, the inclined grinding strips, the horizontal grinding strips and the grinding balls cooperate to increase the friction force of the grinding disc on the matcha raw materials, thereby improving the efficiency and effect of the grinding disc cooperating with the grinding area to grind the matcha.

[0016] Further, the inner wall of the discharge port is integrally formed with an annular protrusion near the top thereof, the inner diameter of the annular protrusion increases from top to bottom, the top of the filter plate is integrally formed with an annular convex edge near the edge thereof, the side of the annular convex edge away from the axis of the grinding disc is attached to the inner side of the annular protrusion, the side of the annular convex edge close to the axis of the grinding disc is in the shape of a circular arc, and the inner diameter of the side of the annular convex edge close to the axis of the grinding disc decreases from top to bottom; the bottom of the shell is sequentially provided with a lower mounting groove and an upper mounting groove in communication with the discharge port from bottom to top, the length of the lower mounting groove is greater than that of the upper mounting groove, the sidewall of the filter plate is fixed with a connecting block matched with the upper mounting groove, the lower mounting groove is provided with a limiting block matched with the lower mounting groove, the limiting block is provided with a bolt penetratingly arranged thereon and matched with the limiting block in a gap, the bolt is threadedly connected with the top wall in the lower mounting groove, the top of the limiting block is attached and fixed with a rubber sheet, the top of the rubber sheet is in abutment with the bottom of the connecting block, and the bottom of the connecting block is fixed with a vibration motor located in the lower mounting groove.

[0017] By adopting the above technical scheme, the vibration motor works to make the filter plate vibrate slightly, in this process, the connecting block vibrates synchronously, and the vibration amplitude is within the thickness range of the rubber sheet, which is conducive to the matcha powder on the filter plate falling from the small holes on the filter plate, and reduces the probability of the small holes on the filter plate being blocked by the matcha powder. The annular protrusion is arranged to make the matcha powder fall towards the side close to the center of the filter plate, and the annular convex edge is matched with the annular protrusion to reduce the probability of the matcha powder entering the gap between the filter plate and the discharge port.

[0018] Further, the driving assembly comprises a driving motor fixed to the top of the shell, a driving gear fixed to the output end of the driving motor, a central rod penetratingly arranged at the top of the shell and matched with the shell, and a driven gear fixed to the central rod and meshed with the driving gear, and the lower end of the central rod is fixed to the top center of the grinding disc; one side of the shell is provided with a cleaning port, the shell is hingedly connected with a side door for closing the cleaning port, the height of the bottom of the cleaning port is greater than that of the top of the grinding area, the shell is provided with a lifting assembly for driving the central rod to lift and lower, and the thickness of the driven gear is greater than that of the driving gear.

[0019] By adopting the above technical scheme, the driving motor works to drive the driving gear to rotate, so that the driven gear meshed with the driving gear, the central rod fixed to the driven gear, and the grinding disc fixed to the central rod are all rotated, so that the grinding disc is matched with the grinding area to grind the matcha. The thickness of the driven gear is greater than that of the driving gear, so that the driven gear remains in meshing state with the driving gear during the lifting and lowering process of the central rod and the grinding disc controlled by the lifting assembly. When the grinding disc is lifted to the height of the side door, the staff can clean the grinding disc by opening the side door. This design reduces the probability of the matcha powder seeping out of the shell from between the side door and the cleaning port.

[0020] Further, the lifting assembly comprises a movable plate fixed to the upper end of the central rod, springs fixed between the bottom surface of the movable plate and the top of the shell, a mounting plate fixed to the top of the shell, a lifting motor fixed to the mounting plate, and a cam fixed to the output end of the lifting motor, the edge of the cam abutting against the bottom of the movable plate, and the springs are evenly distributed about the axis of the central rod, and the upper end of the central rod is fixed to the bottom surface of the movable plate.

[0021] By adopting the above technical scheme, the lifting motor drives the cam to rotate after working, and the movable plate is lifted under the elastic force of the springs, so that the central rod and the grinding disc are synchronously lifted, so that the staff can clean the grinding disc through the cleaning opening. In addition, the lifting assembly can adjust the distance between the bottom of the grinding disc and the grinding area, so that the staff can adjust the position of the grinding disc according to the fineness requirement of the matcha powder.

[0022] Further, the inner wall of the side door is fixed with a cleaning brush for cleaning the side wall of the grinding disc.

[0023] By adopting the above technical scheme, when the grinding disc is lifted to the height of the cleaning opening, the staff drives the grinding disc to rotate through the driving assembly, and the bristles of the cleaning brush clean the matcha powder remaining on the surface of the grinding disc.

[0024] In summary, the present application has the following advantages:

[0025] 1. In the present application, the opening is arranged, which is conducive to the matcha raw materials clamped between the edge of the grinding disc and the inner wall of the shell entering between the edge of the grinding disc and the grinding area and being ground, thereby improving the grinding efficiency and grinding effect of the matcha powder.

[0026] 2. In the present application, the arc-shaped part is arranged, which reduces the sharp edges and corners on the grinding disc, and facilitates the matcha raw materials entering the opening to enter between the edge of the grinding disc and the inner wall of the shell for grinding.

[0027] 3. In the present application, the oblique grinding strip, the transverse grinding strip and the grinding ball cooperate to increase the friction force of the grinding disc on the matcha raw materials, and improve the efficiency and effect of the grinding disc and the grinding area cooperating to grind the matcha. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a whole structure schematic view of an embodiment of the present application;

[0029] Figure 2 is Figure 1 is a structure schematic view from another perspective;

[0030] Figure 3 is a plane schematic view of the present application for highlighting the filter plate and its connecting structure.

[0031] Figure 4 is Figure 3 is an enlarged schematic view of A in figure 1;

[0032] Figure 5 is a structural schematic view for highlighting the grinding disc according to an embodiment of the present application.

[0033] In the figure: 1, shell; 11, support column; 12, feed hopper; 13, discharge port; 131, annular protrusion; 14, grinding area; 15, lower mounting groove; 16, upper mounting groove; 17, cleaning port; 171, side door; 1711, cleaning brush; 2, grinding disc; 21, aperture; 22, arc-shaped portion; 23, oblique grinding strip; 24, transverse grinding strip; 25, grinding ball; 3, filter plate; 31, annular protrusion; 32, connecting block; 321, vibration motor; 4, limiting block; 41, bolt; 42, rubber sheet; 5, driving assembly; 51, driving motor; 52, driving gear; 53, center rod; 54, driven gear; 6, lifting assembly; 61, movable plate; 62, spring; 63, mounting plate; 64, lifting motor; 65, cam. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application, and all other embodiments obtained by a person of ordinary skill in the art without creative labor on the basis of the embodiments in the present application shall fall within the scope of protection of the present application.

[0035] As Figures 1-5 shown, the present application discloses a high-efficiency grinding device for matcha powder, which comprises a shell 1, a support column 11 fixed to the bottom of the shell 1, a feed hopper 12 fixed to the side wall of the shell 1 and in communication with the shell 1, and a grinding disc 2 arranged in the shell 1, wherein a driving assembly 5 for driving the grinding disc 2 to rotate is arranged on the shell 1, a discharge port 13 is arranged at the bottom of the shell 1, a filter plate 3 is arranged in the discharge port 13, a grinding area 14 matched with the bottom of the grinding disc 2 is arranged at the bottom of the shell 1, and an aperture 21 is arranged on the side wall of the grinding disc 2.

[0036] The grinding disc 2 rotates under the driving action of the driving assembly 5, and cooperates with the grinding area 14 to grind the matcha raw materials entering the inside of the shell 1 from the feeding hopper 12. The matcha powder with a fineness smaller than the aperture of the filter plate 3 falls off and is collected by a collection box (not shown in the figure) below the shell 1. The provision of the gap 21 is beneficial to the matcha raw materials stuck between the edge of the grinding disc 2 and the inner wall of the shell 1 to enter between the edge of the grinding disc 2 and the grinding area 14 and be ground, thereby improving the grinding efficiency and grinding effect of the matcha powder. In order to reduce the probability of the matcha raw materials being stuck between the gap 21 and the inner wall of the shell 1, the distance between the gap 21 and the axis of the grinding disc 2 decreases from top to bottom. In this embodiment, an arc-shaped part 22 is arranged at the intersection between the gap 21 and the grinding disc 2. The provision of the arc-shaped part 22 reduces the sharp edges on the grinding disc 2, and facilitates the matcha raw materials entering the gap 21 to enter between the edge of the grinding disc 2 and the inner wall of the shell 1 for grinding.

[0037] The top of the grinding disc 2 and the bottom of the grinding disc 2 are both circular truncated cones, and the cross-sectional area of the grinding disc 2 decreases from the middle part of the grinding disc 2 to the upper and lower sides. This reduces the probability of the matcha raw materials being stuck on the top of the grinding disc 2, and facilitates the matcha powder to fall off from the small holes on the filter plate 3 after the grinding disc 2 cooperates with the grinding area 14 to grind the matcha powder.

[0038] The bottom of the grinding disc 2 is fixed with a plurality of inclined grinding strips 23 uniformly distributed on the arc surface of the bottom of the grinding disc 2, and the bottom of the grinding disc 2 is also fixed with a plurality of horizontal grinding strips 24 uniformly distributed on the plane of the bottom of the grinding disc 2. A plurality of grinding balls 25 are also fixed at the center of the grinding disc 2. The inclined grinding strips 23, the horizontal grinding strips 24 and the grinding balls 25 cooperate to increase the friction force of the grinding disc 2 on the matcha raw materials, and improve the grinding efficiency and effect of the grinding disc 2 and the grinding area 14 in grinding the matcha.

[0039] An annular protrusion 131 is integrally formed on the inner wall of the discharge port 13 near the top thereof, the inner diameter of the annular protrusion 131 increases from top to bottom, an annular ridge 31 is integrally formed on the top of the filter plate 3 near the edge thereof, the side of the annular ridge 31 away from the axis of the grinding disc 2 is attached to the inner side of the annular protrusion 131, the side of the annular ridge 31 near the axis of the grinding disc 2 is arc-shaped, and the inner diameter of the side of the annular ridge 31 near the axis of the grinding disc 2 decreases from top to bottom; the bottom of the shell 1 is sequentially provided with a lower mounting groove 15 and an upper mounting groove 16 from bottom to top in sequence, the lower mounting groove 15 is in communication with the discharge port 13, the length of the lower mounting groove 15 is greater than the length of the upper mounting groove 16, the side wall of the filter plate 3 is fixedly provided with a connecting block 32 matched with the upper mounting groove 16, the lower mounting groove 15 is provided with a limiting block 4 matched with the lower mounting groove 15, the limiting block 4 is provided with a bolt 41 penetratingly arranged thereon and matched with the limiting block 4 in a gap, the bolt 41 is threadedly connected with the top wall in the lower mounting groove 15, the top of the limiting block 4 is attached and fixedly provided with a rubber sheet 42, the top of the rubber sheet 42 is abutted with the bottom of the connecting block 32, and the bottom of the connecting block 32 is fixedly provided with a vibration motor 321 located in the lower mounting groove 15.

[0040] The vibration motor 321 works to make the filter plate 3 vibrate slightly, in this process, the connecting block 32 vibrates synchronously, and the vibration amplitude is within the thickness range of the rubber sheet 42, which is beneficial to the matcha powder on the filter plate 3 falling from the small holes on the filter plate 3, and reduces the probability of the small holes on the filter plate 3 being blocked by the matcha powder. The annular protrusion 131 is arranged to make the matcha powder fall towards the side near the center of the filter plate 3, the annular ridge 31 is matched with the annular protrusion 131 to reduce the probability of the matcha powder entering the gap between the filter plate 3 and the discharge port 13.

[0041] The driving assembly 5 comprises a driving motor 51 fixed to the top of the shell 1, a driving gear 52 fixed to the output end of the driving motor 51, a center rod 53 penetratingly arranged on the top of the shell 1 and matched with the shell 1, and a driven gear 54 fixedly sleeved on the center rod 53 and engaged with the driving gear 52, the lower end of the center rod 53 is fixed to the top center of the grinding disc 2; the shell 1 is provided with a cleaning port 17, the shell 1 is hingedly provided with a side door 171 for closing the cleaning port 17, the height of the bottom of the cleaning port 17 is greater than the height of the top of the grinding area 14, the shell 1 is provided with a lifting assembly 6 for driving the center rod 53 to lift and lower, and the thickness of the driven gear 54 is greater than the thickness of the driving gear 52.

[0042] The driving motor 51 drives the driving gear 52 to rotate, so that the driving gear 52, the driven gear 54, the central rod 53 and the grinding disc 2 rotate, and the grinding disc 2 is matched with the grinding area 14 to grind the matcha. The thickness of the driven gear 54 is greater than that of the driving gear 52, so that the driven gear 54 keeps meshing with the driving gear 52 during the lifting of the central rod 53 and the grinding disc 2 controlled by the lifting assembly 6. When the grinding disc 2 is lifted to the height of the side door 171, the staff can open the side door 171 to clean the grinding disc 2, which reduces the probability of the matcha powder leaking out of the shell 1.

[0043] The lifting assembly 6 includes the movable plate 61 fixed to the upper end of the central rod 53, the springs 62 fixed between the bottom surface of the movable plate 61 and the top of the shell 1, the mounting plate 63 fixed to the top of the shell 1, the lifting motor 64 fixed to the mounting plate 63, and the cam 65 fixed to the output end of the lifting motor 64. The edge of the cam 65 abuts against the bottom of the movable plate 61, and the springs 62 are uniformly distributed about the axis of the central rod 53.

[0044] The lifting motor 64 drives the cam 65 to rotate, and the movable plate 61 is lifted or lowered under the elastic force of the springs 62, so that the central rod 53 and the grinding disc 2 are synchronously lifted or lowered, and the staff can clean the grinding disc 2 from the cleaning port 17. In addition, the lifting assembly 6 can adjust the distance between the bottom of the grinding disc 2 and the grinding area 14, so that the staff can adjust the position of the grinding disc 2 according to the fineness requirement of the matcha powder (note that when the distance between the bottom of the grinding disc 2 and the grinding area 14 is adjusted, the staff needs to replace the filter plate 3, so that the diameter of the small holes on the filter plate 3 meets the fineness requirement of the matcha powder).

[0045] In order to automatically clean the grinding disc 2, the inner wall of the side door 171 is fixed with the cleaning brush 1711 for cleaning the side wall of the grinding disc 2 (note that when the cleaning brush 1711 is selected, the bristles of the cleaning brush 1711 abut against the surface of the grinding disc 2 when the grinding disc 2 is lifted to the height of the cleaning port 17). When the grinding disc 2 is lifted to the height of the cleaning port 17, the staff drives the grinding disc 2 to rotate through the driving assembly 5, and the bristles of the cleaning brush 1711 clean the matcha powder remaining on the surface of the grinding disc 2.

[0046] The use principle of the high-efficiency grinding device for matcha powder in the embodiment is as follows: the grinding disc 2 rotates under the driving action of the driving assembly 5, the grinding disc 2 cooperates with the grinding area 14 and grinds the matcha raw materials entering the inside of the shell 1 from the feeding hopper 12, the matcha powder with a fineness less than the aperture of the filter plate 3 falls off and is collected by the collecting box below the shell 1. The setting of the gap 21 is beneficial to the matcha raw materials stuck between the edge of the grinding disc 2 and the inner wall of the shell 1 to enter between the edge of the grinding disc 2 and the grinding area 14 and be ground, thereby improving the grinding efficiency and grinding effect of the matcha powder.

[0047] The above merely describes preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled persons in the technical field, some improvements and refinements without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. A high-efficiency matcha powder grinding device, comprising a shell (1), a support column (11) fixed to the bottom of the shell (1), a feed hopper (12) fixed to and communicating with the side wall of the shell (1), and a grinding disc (2) disposed inside the shell (1), wherein the shell (1) is provided with a drive assembly (5) for driving the grinding disc (2) to rotate, and the bottom of the shell (1) is provided with a discharge port (13), wherein a filter plate (3) is disposed inside the discharge port (13), characterized in that: The bottom of the shell (1) is provided with a grinding area (14) matched with the bottom of the grinding disc (2), and the sidewall of the grinding disc (2) is provided with an opening (21).

2. The high-efficiency grinding device for matcha powder according to claim 1, characterized by: The distance between the opening (21) and the axis of the grinding disc (2) decreases from top to bottom.

3. The high-efficiency grinding device for matcha powder according to claim 2, characterized in that: An arc-shaped part (22) is arranged at the intersection between the opening (21) and the grinding disc (2).

4. The high-efficiency grinding device for tea powder according to claim 3, characterized in that: The top and bottom of the grinding disc (2) are in the shape of a circular truncated cone, and the cross-sectional area of the grinding disc (2) decreases from the middle to the upper and lower sides.

5. The high-efficiency grinding device for tea powder according to claim 4, characterized in that: A plurality of inclined grinding strips (23) are fixed on the bottom of the grinding disc (2) and uniformly distributed on the arc surface of the bottom of the grinding disc (2), a plurality of transverse grinding strips (24) are also fixed on the bottom of the grinding disc (2) and uniformly distributed on the plane of the bottom of the grinding disc (2), and a plurality of grinding balls (25) are also fixed at the center of the grinding disc (2).

6. The high-efficiency grinding device for tea powder according to claim 5, characterized in that: An annular protrusion (131) is integrally formed on the inner wall of the discharge port (13) near the top thereof, the inner diameter of the annular protrusion (131) increases from top to bottom, an annular convex edge (31) is integrally formed on the top of the filter plate (3) near the edge thereof, the side of the annular convex edge (31) away from the axis of the grinding disc (2) is attached to the inner side of the annular protrusion (131), the side of the annular convex edge (31) close to the axis of the grinding disc (2) is in the shape of a circular arc, and the inner diameter of the side of the annular convex edge (31) close to the axis of the grinding disc (2) decreases from top to bottom. The bottom of the shell (1) is sequentially provided with a lower mounting groove (15) and an upper mounting groove (16) from bottom to top, the lower mounting groove (15) is in communication with the discharge port (13), the length of the lower mounting groove (15) is greater than that of the upper mounting groove (16), the sidewall of the filter plate (3) is fixed with a connecting block (32) matched with the upper mounting groove (16), the lower mounting groove (15) is provided with a limiting block (4) matched with the lower mounting groove (15), the limiting block (4) is provided with a bolt (41) penetratingly arranged thereon and matched with the limiting block (4) in a gap, the bolt (41) is threadedly connected with the inner top wall of the lower mounting groove (15), the top of the limiting block (4) is attached and fixed with a rubber sheet (42), the top of the rubber sheet (42) is in abutment with the bottom of the connecting block (32), and the bottom of the connecting block (32) is fixed with a vibration motor (321) located in the lower mounting groove (15).

7. The high-efficiency grinding device for tea powder according to claim 5, characterized in that: The driving assembly (5) comprises a driving motor (51) fixed to the top of the shell (1), a driving gear (52) fixed to the output end of the driving motor (51), a central rod (53) penetratingly arranged on the top of the shell (1) and matched with the shell (1), and a driven gear (54) fixedly sleeved on the central rod (53) and meshed with the driving gear (52), and the lower end of the central rod (53) is fixed to the top center of the grinding disc (2). The shell (1) is provided with a cleaning port (17) on one side, a side door (171) is hinged to the shell (1) for closing the cleaning port (17), the height of the bottom of the cleaning port (17) is greater than the height of the top of the grinding area (14), the shell (1) is provided with a lifting assembly (6) for driving the center rod (53) to lift and drop, and the thickness of the driven gear (54) is greater than the thickness of the driving gear (52).

8. The high-efficiency grinding device for tea powder according to claim 7, characterized in that: The lifting assembly (6) comprises a movable plate (61) fixed to the upper end of the center rod (53), springs (62) fixed between the bottom surface of the movable plate (61) and the top of the shell (1), a mounting plate (63) fixed to the top of the shell (1), a lifting motor (64) fixed to the mounting plate (63), and a cam (65) fixed to the output end of the lifting motor (64), the edge of the cam (65) is in abutment with the bottom of the movable plate (61), the springs (62) are provided in plurality and are uniformly distributed about the axis of the center rod (53), and the upper end of the center rod (53) is fixed to the bottom surface of the movable plate (61).

9. The high-efficiency grinding device for tea powder according to claim 7, characterized in that: The inner wall of the side door (171) is fixed with a cleaning brush (1711) for cleaning the side wall of the grinding disc (2).

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