Self-cleaning bean grinder

Abstract

The self-cleaning bean grinder comprises a shell, a supporting partition plate is arranged in the shell, an L-shaped supporting mounting plate is arranged at the bottom of one transverse end of the supporting partition plate, a grinding assembly is arranged at the other end of the supporting partition plate, a powder receiving frame is arranged on the inner surface of one transverse side of the L-shaped supporting mounting plate, and a powder receiving opening corresponding to the powder receiving frame is formed in one transverse side of the shell; a bean bin assembly is arranged at the top of the grinding assembly, and a plurality of cleaning assemblies are symmetrically arranged on the two longitudinal sides of the grinding assembly. The device has the beneficial effects that the device is reasonable in design, stable and firm in overall structure and high in practicability; according to the bean grinder, the crushing and grinding fineness of bean powder can be controlled and adjusted, meanwhile, residual powder in the bean grinder can be cleaned after grinding, and the use sanitation and safety of the bean grinder are improved.

Description

Technical Field

[0001] The invention relates to the technical field of disc-type grain mills, in particular to a self-cleaning bean grinder. Background Art

[0002] A bean grinder is a machine specially used to grind roasted beans into powder. It grinds the beans finely through a high-speed rotating grinding disc, so that the bean powder has an appropriate particle size and uniformity, which is convenient for subsequent cooking or beverage making. Common bean grinders include manual grinders and electric grinders. The former relies on manually rotating grinding discs for grinding, while the latter uses electric motors to drive the grinding discs to complete the grinding. Common grinding discs for bean grinders include flat grinding discs, conical grinding discs, and blade-type grinding discs. Different designs will affect the grinding effect and the uniformity of the powder.

[0003] Chinese patent CN208494356U discloses a coffee bean grinder, including a housing, an outer grinding wheel and an inner grinding wheel are fixedly arranged inside the housing, a plurality of movable cutter heads distributed in a circular array are fixedly arranged inside the outer grinding wheel, an adjusting ring is fixedly arranged outside the movable cutter head, the upper and lower ends of the adjusting ring are threadedly connected to the housing, the adjusting ring and the movable cutter head attract each other, and the adjusting ring is threadedly connected to the housing of the coffee bean grinder, so that when the adjusting ring moves up and down, the movable cutter head is squeezed and pulled out, thereby adjusting the spacing between the movable cutter head and the inner grinding wheel. However, after the coffee bean grinder is used, bean powder will remain inside, and it can only be cleaned with a special brush, which is not only inconvenient to operate, but also has a poor cleaning effect;

[0004] Chinese patent CN216167007U discloses a grinder that is easy to clean. It includes a main machine, a driving device, a lower cone grinding wheel and an upper cone grinding wheel. The main machine is provided with a grinding chamber, and the driving device is arranged inside the main machine. The upper cone grinding wheel, the lower cone grinding wheel and the powder container are all detachable and easy to take out and clean. However, when the grinding chamber needs to be cleaned, the upper cone grinding wheel, the lower cone grinding wheel and the powder container need to be disassembled, and they need to be installed after cleaning. Not only is the operation inconvenient, but after long-term and multiple disassembly and assembly, the matching precision between the components will be affected, affecting the actual use effect, and further development and improvement are needed. Summary of the invention

[0005] The purpose of the present invention is to provide a self-cleaning coffee bean grinder in order to solve the problem that the existing coffee bean grinder is inconvenient to clean the residual bean powder inside.

[0006] The present invention achieves the above-mentioned purpose through the following technical scheme: a self-cleaning coffee bean grinder, comprising a shell, a supporting partition is arranged inside the shell, an L-shaped supporting mounting plate is arranged at the bottom of one lateral end of the supporting partition, and a grinding assembly is arranged at the other end, a powder receiving rack is arranged on the inner surface of one lateral side of the L-shaped supporting mounting plate, a powder receiving port is opened on one lateral side of the shell corresponding to the powder receiving rack, a powder pressing assembly is arranged on the top of the supporting partition corresponding to the position of the powder receiving rack, a bean bin assembly is arranged on the top of the grinding assembly, a number of cleaning assemblies are symmetrically arranged on both longitudinal sides of the grinding assembly, a water storage tank is arranged on the inner surface of the bottom of the shell corresponding to the position of the grinding assembly, a water pump is arranged on one longitudinal side of the water storage tank, a hot air blower is arranged on the lateral side of the water pump, and a control device is arranged on the outer surface of the shell above the powder receiving port.

[0007] Further, the grinding assembly includes a grinding chamber body, the bottom of the grinding chamber body is connected to the top of the supporting partition, a first rotating motor is arranged at the bottom of the supporting partition, a lower grinding disc is installed after the top output end of the first rotating motor passes through the supporting partition and the bottom of the grinding chamber body in sequence, a rotating seal is arranged between the output end of the first rotating motor and the grinding chamber body, an upper grinding disc is threadedly connected to the top of the grinding chamber body, a transmission gear disc is arranged on the circumferential outer surface of the upper grinding disc located above the grinding chamber body, and a powder outlet is opened on the side of the grinding chamber body that is laterally close to the powder receiving frame. A support mounting frame is provided on the other side, a powder discharge pipe is provided at an angle downward at the powder discharge port, one end of the powder discharge pipe extends into the inner side of the L-shaped support mounting plate, a transmission worm is provided above the support mounting frame, a rotating support plate is provided at both ends of the transmission worm, the transmission worm is meshed with the transmission gear plate, one end of the transmission worm extends to the outside of the rotating support plate and is installed with a first bevel gear, a second rotating motor is installed at the bottom of one end of the support mounting frame, a top output end of the second rotating motor extends to the top of the support mounting frame and is installed with a second bevel gear, and the first bevel gear is meshed with the second bevel gear.

[0008] Furthermore, the powder pressing assembly includes a fixed socket, which is arranged at a position corresponding to the powder receiving rack at the top of the supporting partition, a powder pressing head is installed at the bottom of the fixed socket, the supporting partition is a hollow structure corresponding to the position of the powder pressing head, a transmission box is arranged on the top of the fixed socket, and a lifting support rod is arranged on the top of the powder pressing head, the fixed socket and the transmission box are both plug-in connected to the lifting support rod in a vertical direction, a plug-in limit platform is arranged on one side of the lifting support rod, and a plurality of transmission teeth and grooves are equidistantly arranged on the other side from top to bottom, the fixed socket and the transmission box are both plug-in connected to the transmission teeth and grooves in a vertical direction, a third rotating motor is arranged on the outer surface of one longitudinal side of the transmission box, the output end of the third rotating motor extends into the inner side of the transmission box where a transmission gear is installed, and the transmission gear is meshed with the transmission teeth and groove.

[0009] Furthermore, the bean bin assembly includes a bean bin body arranged above the grinding bin body, the bean bin body is plug-connected with the top of the shell, the lower half of the bean bin body is a conical structure with a larger top and a smaller bottom, a support connecting sleeve is provided at the bottom of the bean bin body, a support plug-in sleeve is provided at the bottom of the support connecting sleeve, one end of the support plug-in sleeve is plug-connected with the inner side of the upper grinding disc, a support limiting ring is plug-in installed on the outer side of the support connecting sleeve, at least two limiting protrusions are equidistantly provided on the outer surface of the support connecting sleeve, an annular limiting groove is provided on the inner surface of the support limiting ring, and plug-in slide grooves are provided on the inner surface of the support limiting ring corresponding to the position of the limiting protrusion, the plug-in slide groove is connected with the annular limiting groove, and the first lifting support plates are symmetrically provided on both sides of the support limiting ring, and the top of the first lifting support plate is connected to the inner surface of the top of the shell A first lifting device is arranged between the two, one end of the first lifting support plate on the lateral side of the support limiting ring is slidably connected to the inner surface of the lateral side of the shell in the vertical direction, a second lifting support plate is arranged below the first lifting support plate on the other side, a second lifting device is arranged at the bottom of the first lifting support plate, an output end of the second lifting device passes through the second lifting support plate to install a limiting block, the output end of the second lifting device is plug-connected with the second lifting support plate, a fourth rotating motor is arranged on the top of the second lifting support plate near one end of the support plug sleeve, and a guide plug rod is arranged on the top of the other end, the guide plug rod is plug-connected with the first lifting support plate, the output end at the bottom of the fourth rotating motor extends to the bottom of the second lifting support plate to install a rotating support plate, and a sealing cover is arranged at one end of the rotating support plate.

[0010] Furthermore, the cleaning component includes a T-shaped plug hole and a movable support plate radially arranged on the wall of the grinding bin body, the length direction of the movable support plate is perpendicular to the axial direction of the T-shaped plug hole, the bottom of the movable support plate is slidably connected to the top of the support partition along the axial direction of the T-shaped plug hole, the T-shaped plug hole includes a plug hole body and a limiting plug hole connected thereto, one end of the plug hole body is connected to the inner side of the grinding bin body, and one end of the limiting plug hole is connected to the outer side of the grinding bin body, a protective support box is arranged on the outer side of the movable support plate, and a support rotating seat is arranged on the movable support plate corresponding to the position of the T-shaped plug hole, A first telescopic device is arranged between the support rotating seat and the inner surface of the protective support box, a rotating shaft is arranged on the support rotating seat above the first telescopic device, a rotating support mounting plate is arranged on one end of the rotating shaft close to the T-shaped plug hole, a fifth rotating motor is arranged on the surface of the support rotating seat away from the rotating support mounting plate, an output end of the fifth rotating motor is connected to one end of the rotating shaft, three second telescopic devices are equidistantly arranged on the circumference of one side of the rotating support mounting plate close to the support rotating seat, and the output ends of the three second telescopic devices pass through the rotating support mounting plate and are sequentially installed with a first limiting plug-in rod, a second limiting plug-in rod and a third limiting plug-in rod. A plug-in rod, the first limit plug-in rod, the second limit plug-in rod and the third limit plug-in rod are respectively provided with a first support plug-in rod, a second support plug-in rod and a third support plug-in rod at one end away from the rotation support mounting plate, the first support plug-in rod, the second support plug-in rod and the third support plug-in rod are respectively provided with a water spray head, an air spray head and a blocking block at one end away from the rotation support mounting plate, a first channel and a second channel are respectively provided between the first limit plug-in rod and the inside of the first support plug-in rod and between the second limit plug-in rod and the inside of the second support plug-in rod, and one end of the first limit plug-in rod and the second limit plug-in rod are respectively provided with a water spray head, an air spray head and a blocking block. There are a first connector and a second connector, the water spray head and one end of the first connector are both connected to the first channel, the air spray head and one end of the second connector are both connected to the second channel, the water pump input end is connected to the inside of the water tank through a water pipe, the output end is connected to the other end of the first connector through a water pipe, the hot air blower output end is connected to the other end of the second connector through an air pipe, and L-shaped fixed mounting plates are provided on the outer surfaces of both sides of the support rotating seat, and a plurality of bull's eye balls are equidistantly provided on one end of the L-shaped fixed mounting plate from top to bottom, and the outer surface of the ball in the bull's eye ball is in contact with the surface of one side of the rotating support mounting plate.

[0011] Furthermore, the movable support plate and the support rotating seat as well as the support rotating seat and the L-shaped fixed installation plate are fixedly connected by welding.

[0012] Furthermore, the outer diameters of the first limiting plug-in rod, the second limiting plug-in rod and the third limiting plug-in rod match the inner diameters of the limiting plug-in hole to form a plug-in fit.

[0013] Furthermore, the outer diameters of the first supporting plug-in rod, the second supporting plug-in rod and the third supporting plug-in rod match the inner diameters of the plug-in hole body to form a plug-in fit.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The invention has a reasonable design, a stable and firm overall structure, and strong practicability; it can not only control and adjust the coarseness of bean powder crushing and grinding, but also clean the residual powder inside after grinding, thereby improving the sanitation and safety of the bean grinder;

[0016] 2. Specifically, the grinding component can not only crush and grind the bean material, but also adjust the coarseness of the ground bean powder. At the same time, combined with the powder pressing component, the bean powder can be pressed and extracted to meet the various usage needs of users and improve the user experience.

[0017] 3. Specifically, the bean bin body realizes precise plugging with the upper grinding disc through the design of the supporting connection sleeve and the supporting plug-in sleeve, and the movement of the bean bin body can be effectively fixed and restricted through the cooperation of the limiting protrusion, the plug-in slide groove and the annular limiting groove, which simplifies the disassembly and installation process and improves the convenience of operation; the lifting operation of the bean bin body is realized through the first lifting support plate and the second lifting support plate and the first lifting device and the second lifting device, and the position of the bean bin can be flexibly adjusted to meet different operation requirements, such as crushing, grinding, cleaning and the like; the cooperation of the second lifting device and the limiting block can ensure that the rotating support plate and the sealing cover remain stable during the lifting process, avoiding collision with other parts of the grinder. The design of the sealing cover can form a seal with the upper grinding disc during the cleaning process, cooperate with the first lifting device to achieve precise operation, and close and isolate the top of the grinding bin body, which improves the convenience and efficiency of cleaning and avoids cross contamination of residues;

[0018] 4. Specifically, the cleaning component can switch between three states to cooperate with the grinding bin body to achieve the normal operation of the grinding bin component and automatically clean the inside of the grinding bin. (1) When the bean material is crushed and ground normally, the sealing block is adjusted to the T-shaped plug hole to seal it to ensure the sealing of the grinding bin body and prevent leakage of bean powder. (2) When cleaning is required, the water spray head is adjusted to the inside of the plug hole body. With the cooperation of the water pump, the cleaning water in the water storage tank is pumped out and passes through the water pipe, the first connector and the first channel in turn, and finally sprayed out through the water spray head to rinse the inside of the grinding bin body. (3) After rinsing the inside of the grinding bin body, the water spray head is removed from the T-shaped plug hole and the air spray head is sent to the inside of the plug hole body. With the cooperation of the hot air blower, the inside of the grinding bin body is blown and dried to avoid residual moisture and prevent bacterial growth and mold formation. This automatic cleaning greatly reduces the complexity of manual operation and improves the efficiency and consistency of cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a front view of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the grinding assembly in the present invention;

[0022] Figure 4 is a schematic diagram of the cross-sectional structure of the grinding assembly in the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the powder pressing component in the present invention;

[0024] Figure 6 This is a front view of the bean bin assembly of the present invention;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the supporting connecting sleeve in the present invention;

[0026] Figure 8 It is a schematic diagram of the three-dimensional structure of the support and limiting ring in the present invention;

[0027] Fig. 9 It is a right side view of a partially cut-away cleaning assembly of the present invention;

[0028] Fig.10 for Fig. 9 Enlarged view of part A in the middle;

[0029] Fig.11 It is a schematic diagram of a partially cutaway three-dimensional structure of the cleaning component of the present invention;

[0030] Fig.12It is a schematic diagram of the structure of the T-shaped plug hole in the present invention;

[0031] Fig.13 is a schematic structural diagram of the first channel in the present invention;

[0032] Fig.14 It is a schematic structural diagram of the second channel in the present invention.

[0033] In the figure: 1-shell, 2-support partition, 3-L-shaped support mounting plate, 4-grinding assembly, 5-powder receiving rack, 6-powder pressing assembly, 7-bean silo assembly, 8-cleaning assembly, 9-water storage tank, 10-water pump, 11-hot air blower, 12-control device;

[0034] 401-grinding chamber body, 402-first rotating motor, 403-lower grinding disc, 404-upper grinding disc, 405-transmission gear disc, 406-support mounting frame, 407-powder outlet pipe, 408-transmission worm, 409-first bevel gear, 410-second rotating motor, 411-second bevel gear;

[0035] 601-fixed socket, 602-pressing head, 603-transmission box, 604-lifting support rod, 605-plugging limit table, 606-transmission tooth groove, 607-third rotating motor, 608-transmission gear;

[0036] 701-bean bin body, 702-support connecting sleeve, 703-support plug sleeve, 704-support limiting ring, 705-limiting protrusion, 706-annular limiting groove, 707-plug sliding groove, 708-first lifting support plate, 709-first lifting device, 710-second lifting support plate, 711-second lifting device, 712-limiting block, 713-fourth rotating motor, 714-guide plug rod, 715-rotating support plate, 716-sealing cover;

[0037] 801-T-type plug-in hole, 802-movable support plate, 803-protective support box, 804-support rotating seat, 805-first telescopic device, 806-rotating support mounting plate, 807-fifth rotating motor, 808-second telescopic device, 809-first limiting plug-in rod, 810-second limiting plug-in rod, 811-third limiting plug-in rod, 812-first support plug-in rod, 813-second support plug-in rod, 814-third support plug-in rod, 815-spray head, 816-spray head, 817-blocking block, 818-first channel, 819-second channel, 820-first connecting head, 821-second connecting head, 822-L-type fixed mounting plate, 823-bull's eye ball, 8011-plug-in hole body, 8012-limit plug-in hole. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0039] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations 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 should not be understood as a limitation on the present invention.

[0040] Combination Figures 1 to 14 A self-cleaning coffee bean grinder shown in the figure comprises a shell 1, a supporting partition 2 is arranged inside the shell 1, an L-shaped supporting mounting plate 3 is arranged at the bottom of one lateral end of the supporting partition 2, and a grinding assembly 4 is arranged at the other end, a powder receiving rack 5 is arranged on the inner surface of one lateral side of the L-shaped supporting mounting plate 3, a powder receiving port is opened on one lateral side of the shell 1 corresponding to the powder receiving rack 5, a powder pressing assembly 6 is arranged at the position of the powder receiving rack 5 on the top of the supporting partition 2, a bean bin assembly 7 is arranged on the top of the grinding assembly 4, and a plurality of cleaning assemblies 8 are symmetrically arranged on both sides of the grinding assembly 4 in the longitudinal direction, a water storage tank 9 is arranged on the inner surface of the bottom of the shell 1 corresponding to the position of the grinding assembly 4, a water pump 10 is arranged on one longitudinal side of the water storage tank 9, a hot air blower 11 is arranged on one lateral side of the water pump 10, and a control device 12 is arranged on the outer surface of the shell 1 above the powder receiving port.

[0041] The grinding assembly 4 includes a grinding chamber body 401, the bottom of the grinding chamber body 401 is connected to the top of the supporting partition 2, a first rotating motor 402 is arranged at the bottom of the supporting partition 2, the top output end of the first rotating motor 402 passes through the supporting partition 2 and the bottom of the grinding chamber body 401 in sequence, and a lower grinding disc 403 is installed thereafter, a rotating seal is arranged between the output end of the first rotating motor 402 and the grinding chamber body 401, an upper grinding disc 404 is threadedly connected to the top of the grinding chamber body 401, and the upper grinding disc 404 is located at the grinding chamber body 401. A transmission gear plate 405 is arranged on the circumferential outer surface above the bin body 401, a powder outlet is arranged on one side of the grinding bin body 401 near the powder receiving frame 5, and a support mounting frame 406 is arranged on the other side, a powder outlet pipe 407 is arranged at an angle downward at the powder outlet, and one end of the powder outlet pipe 407 extends into the inner side of the L-shaped support mounting plate 3, and the lower grinding disc 403 is driven to rotate by the first rotating motor 402, and the bean material between the lower grinding disc 403 and the upper grinding disc 404 in the machine is broken with the cooperation of the upper grinding disc 404. The powder is crushed and ground, and then discharged into the powder receiving plate on the powder receiving frame 5 through the powder outlet and the powder outlet pipe 407; a transmission worm 408 is arranged above the support mounting frame 406, and a rotating support plate is arranged at both ends of the transmission worm 408, and the transmission worm 408 is meshed with the transmission gear plate 405, and one end of the transmission worm 408 extends to the outside of the rotating support plate and is installed with a first bevel gear 409, and a second rotating motor 410 is installed at the bottom of one end of the support mounting frame 406, and the top output end of the second rotating motor 410 extends to the support mounting frame 4 06 is provided with a second bevel gear 411 above, the first bevel gear 409 is meshed with the second bevel gear 411, and the second bevel gear 411 is driven to rotate by the second rotating motor 410, and the transmission worm 408 is driven to rotate under the transmission of the first bevel gear 409, and the transmission gear plate 405 meshed with the transmission worm 408 rotates accordingly, driving the upper grinding disc 404 to achieve lifting and lowering, so as to adjust the distance between the upper grinding disc 404 and the lower grinding disc 403, so as to control and adjust the coarseness of the bean powder after crushing and grinding.

[0042] The powder pressing assembly 6 includes a fixed socket 601, which is arranged at a position corresponding to the powder receiving frame 5 on the top of the supporting partition, a powder pressing head 602 is installed at the bottom of the fixed socket 601, and the position corresponding to the powder pressing head 602 on the supporting partition 2 is a hollow structure, a transmission box 603 is arranged on the top of the fixed socket 601, and a lifting support rod 604 is arranged on the top of the powder pressing head 602. The fixed socket 601 and the transmission box 603 are plug-connected with the lifting support rod 604 in the vertical direction, and a plug-in limit platform 60 is arranged on one side of the lifting support rod 604. 5, and a plurality of transmission tooth grooves 606 are equidistantly arranged from top to bottom on the other side, and the fixed socket 601 and the transmission box 603 are plug-connected with the transmission tooth grooves 606 in the vertical direction, and a third rotary motor 607 is arranged on the outer surface of one longitudinal side of the transmission box 603, and the output end of the third rotary motor 607 extends into the transmission box 603 and a transmission gear 608 is installed on the inner side, and the transmission gear 608 is meshed with the transmission tooth grooves 606 to realize the compaction operation of the bean powder in the powder receiving plate on the upper part of the powder rack 5, so as to improve the extraction effect and further improve the taste of the beverage.

[0043] The bean bin assembly 7 includes a bean bin body 701 arranged above the grinding bin body 401, the bean bin body 701 is plug-connected with the top of the shell 1, the lower half of the bean bin body 701 is a conical structure with a large top and a small bottom, a support connection sleeve 702 is arranged at the bottom of the bean bin body 701, a support plug-in sleeve 703 is arranged at the bottom of the support connection sleeve 702, one end of the support plug-in sleeve 703 is plug-connected with the inner side of the upper grinding disc 404, a support limiting ring 704 is plug-installed on the outer side of the support connection sleeve 702, at least two limiting protrusions 705 are equidistantly arranged on the outer surface of the support connection sleeve 702, an annular limiting groove 706 is arranged on the inner surface of the support limiting ring 70 The inner surface of the support sleeve 702 is provided with a plug-in slide groove 707 at the position corresponding to the limiting protrusion 705, and the plug-in slide groove 707 is connected with the annular limiting groove 706. The bean silo body 701, the support connection sleeve 702 and the support plug-in sleeve 703 are an integrated structure, and one end of the support plug-in sleeve 703 is plug-connected with the inner side of the upper grinding disc 404, so that the bean material in the bean silo body 701 can enter between the upper grinding disc 404 and the lower grinding disc 403 for crushing and grinding. Among them, the limiting protrusion 705 provided on the outer surface of the support connection sleeve 702 can enter the annular limiting groove 706 through the plug-in slide groove 707 and rotate to realize the fixed limit of the bean silo body 701, which is convenient for the bean silo body 701 to be crushed and ground. Disassembly and assembly fixing; the first lifting support plates 708 are symmetrically arranged on both sides of the support and limiting ring 704, and a first lifting device 709 is arranged between the top of the first lifting support plate 708 and the inner surface of the top of the shell 1. One end of the first lifting support plate 708 on one side of the support and limiting ring 704 is slidably connected with the inner surface of one side of the shell 1 in the vertical direction, and a second lifting support plate 710 is arranged below the first lifting support plate 708 on the other side. The first lifting device 709 is arranged to drive the first lifting support plate 708 to rise and fall, and under the cooperative transmission of the support and limiting ring 704, the bean bin body 701 can be driven to realize the lifting operation; the first lifting support plate 708 08. A second lifting device 711 is provided at the bottom, and a limited block 712 is installed at the output end of the second lifting device 711 through the second lifting support plate 710. The output end of the second lifting device 711 is plugged and connected with the second lifting support plate 710. A fourth rotating motor 713 is provided at the top of the second lifting support plate 710 near one end of the supporting plug sleeve 703, and a guide plug rod 714 is provided at the top of the other end. The guide plug rod 714 is plugged and connected with the first lifting support plate 708. The output end of the bottom of the fourth rotating motor 713 extends to the bottom of the second lifting support plate 710 and a rotating support plate 715 is installed. A sealing cover 716 is provided at one end of the rotating support plate 715.When the support socket 703 descends and is plugged into the upper grinding disc 404, the second lifting device 711 will drive the second lifting support plate 710 to rise with the cooperation of the limit block 712. At the same time, the fourth rotary motor 713, the rotating support plate 715 and the sealing cover 716 installed on the second lifting support plate 710 will follow and rise, so as to avoid collision between the rotating support plate 715 and the sealing cover 716 and other parts of the grinder; and when the support socket 703 rises and leaves the upper grinding disc 404, and the inside of the grinding bin body 401 needs to be cleaned, the second lifting device 711 will drive the second lifting support plate 710 to descend, so that the sealing cover 716 is lifted and lowered to between the support socket 703 and the upper grinding disc 404, and then the fourth rotary motor 713, the rotating support plate 715 and the sealing cover 716 are installed on the second lifting support plate 710. The motor 713 will drive the rotating support plate 715 and the sealing cover 716 to rotate to the top of the upper grinding disc 404, and finally drive the support plug sleeve 703 to descend and press the sealing cover 716 by controlling the first lifting device 709 according to the above steps, that is, to seal the top of the grinding chamber body 401, so as to facilitate the internal flushing and cleaning. It is worth noting that during the process of the first lifting device 709 driving the support plug sleeve 703 to press the sealing cover 716, although the second lifting device 711 follows the first lifting support plate 708 to descend, the structure of the second lifting device 711 output end and the second lifting support plate 710 plug-in connection will keep the height position of the sealing cover 716 at the top of the upper grinding disc 404 unchanged. ;

[0044] The cleaning component 8 includes a T-shaped plug hole 801 and a movable support plate 802 radially arranged on the wall of the grinding bin body 401. The length direction of the movable support plate 802 is perpendicular to the axial direction of the T-shaped plug hole 801. The bottom of the movable support plate 802 is slidably connected to the top of the support partition 2 along the axial direction of the T-shaped plug hole 801. The T-shaped plug hole 801 includes a plug hole body 8011 and a limiting plug hole 8012 connected thereto. One end of the plug hole body 8011 is connected to the inner side of the grinding bin body 401, and one end of the limiting plug hole 8012 is connected to the outer side of the grinding bin body 401. A protective support box 803 is arranged on the outer side of the movable support plate 802, and a support rotating seat is arranged on the movable support plate 802 at the position corresponding to the T-shaped plug hole 801. 804, a first telescopic device 805 is arranged between the supporting rotating seat 804 and the inner surface of the protective support box 803, a rotating shaft is arranged on the supporting rotating seat 804 above the first telescopic device 805, a rotating support mounting plate 806 is arranged on the end of the rotating shaft close to the T-shaped plug hole 801, a fifth rotating motor 807 is installed on the surface of the supporting rotating seat 804 away from the rotating support mounting plate 806, the output end of the fifth rotating motor 807 is connected to one end of the rotating shaft, three second telescopic devices 808 are equidistantly arranged on the surface of the rotating support mounting plate 806 close to the supporting rotating seat 804, and the output ends of the three second telescopic devices 808 pass through the rotating support mounting plate 806 and are sequentially installed with a first limiting plug rod 809, a second limiting plug rod 809 and a second limiting plug rod 809. The plug rod 810 and the third limit plug rod 811, the first limit plug rod 809, the second limit plug rod 810 and the third limit plug rod 811 are respectively provided with a first support plug rod 812, a second support plug rod 813 and a third support plug rod 814 at one end away from the rotating support mounting plate 806, the first support plug rod 812, the second support plug rod 813 and the third support plug rod 814 are respectively provided with a water spray head 815, an air spray head 816 and a blocking block 817 at one end away from the rotating support mounting plate 806, and the first limit plug rod 809 and the first support plug rod 812 are provided between the inside and the second limit plug rod 810 and the second support plug rod 813. The first channel 818 and the second channel 819 are respectively provided between the inside and the outside of the first limit plug rod 809 and the first support plug rod 812, and between the inside and the outside of the second limit plug rod 810 and the second support plug rod 813 819, the first limit plug rod 809 and the second limit plug rod 810 are respectively provided with a first connector 820 and a second connector 821 at one end, the water spray head 815 and one end of the first connector 820 are both connected to the first channel 818, the spray head 816 and one end of the second connector 821 are both connected to the second channel 819, the input end of the water pump 10 is connected to the inside of the water storage tank 9 through a water pipe, and the output end is connected to the other end of the first connector 820 through a water pipe, and the output end of the hot air blower 11 is connected to the other end of the second connector 821 through an air pipe, and the outer surfaces of both sides of the support rotating seat 804 are provided with L-shaped fixed mounting plates 822, and one end of the L-shaped fixed mounting plate 822 is equidistantly provided with a plurality of bull's eye balls 823 from top to bottom,The outer surface of the bull's eye ball 823 contacts the surface of one side of the rotation support mounting plate 806;

[0045] The first limiting plug-in rod 809, the second limiting plug-in rod 810, the third limiting plug-in rod 811, the first supporting plug-in rod 812, the second supporting plug-in rod 813 and the third supporting plug-in rod 814 are all coaxial with the T-shaped plug-in hole 801 when following the rotating support mounting plate 806 to rotate to the highest point, so that the first limiting plug-in rod 809, the second limiting plug-in rod 810 and the third limiting plug-in rod 811 are plugged and matched with the limiting plug-in hole 8012, and the first supporting plug-in rod 812, the second supporting plug-in rod 813 and the third supporting plug-in rod 814 are plugged and matched with the plug-in hole body 8011; in addition, the first limiting plug-in rod Optical positioning sensors are provided on the rotating support mounting plate 806 inside the second limiting plug-in rod 809, the second limiting plug-in rod 810 and the third limiting plug-in rod 811, as well as on the outer surface of the grinding chamber body 401 below the T-shaped plug-in hole 801, so as to accurately adjust the first limiting plug-in rod 809, the second limiting plug-in rod 810 and the third limiting plug-in rod 811 to a coaxial position with the T-shaped plug-in hole 801; when the grinder is used normally, the third limiting plug-in rod 811 and the third supporting plug-in rod 814 are respectively plug-connected with the limiting plug-in hole 8012 and the plug-in hole body 8011, and the surface of one end of the blocking block 817 is in contact with the grinding chamber body 401. The inner surface of the grinding chamber body 401 is on the same arc surface. When the inside of the grinding chamber body 401 needs to be cleaned, the third limit plug-in rod 811 will be driven to retreat under the cooperation of the first telescopic device 805 and the second telescopic device 808, so that the blocking block 817 leaves the grinding chamber body 401, and then the fifth rotating motor 807 is controlled to drive the rotating support mounting plate 806 to rotate, so that the first limit plug-in rod 809 is adjusted to a coaxial position with the T-shaped plug-in hole 801, and then the first limit plug-in rod 809 is driven forward under the cooperation of the first telescopic device 805 and the second telescopic device 808, so that the water spray head 815 enters the plug-in hole. The cleaning water in the water storage tank 9 is pumped out in cooperation with the water pump 10, and is sequentially passed through the water pipe, the first connector 820 and the first channel 818, and finally sprayed out through the water spray head 815 to wash the inside of the grinding bin body 401. After the inside of the grinding bin body 401 is washed, the first telescopic device 805, the second telescopic device 808 and the fifth rotating motor 807 are controlled to work, and the water spray head 815 is taken away from the T-shaped plug hole 801, and the air spray head 816 is sent to the inside of the plug hole body 8011. With the cooperation of the hot air blower 11, the inside of the grinding bin body 401 is blown and dried.

[0046] Among them, the movable support plate 802 and the support rotating seat 804, as well as the support rotating seat 804 and the L-shaped fixed installation plate 822 are fixedly connected by welding to ensure the stability and firmness of the connection structure between each other and improve the service life; the outer diameters of the first limiting plug-in rod 809, the second limiting plug-in rod 810 and the third limiting plug-in rod 811 match the inner diameter of the limiting plug-in hole 8012 and are plug-fitted, and the outer diameters of the first supporting plug-in rod 812, the second supporting plug-in rod 813 and the third supporting plug-in rod 814 match the inner diameter of the plug-in hole body 8011 and are plug-fitted, so as to ensure the first limiting plug-in rod 809, the second limiting plug-in rod 810, the third limiting plug-in rod The first support plug-in rod 811, the second support plug-in rod 812, the second support plug-in rod 813 and the third support plug-in rod 814 are plugged into the T-shaped plug-in hole 801; in addition, the water pump 10, the hot air blower 11, the first rotating motor 402, the second rotating motor 410, the third rotating motor 607, the first lifting device 709, the second lifting device 711, the fourth rotating motor 713, the first telescopic device 805, the fifth rotating motor 807 and the second telescopic device 808 are all electrically connected to the control device 12 to control the working state of each driving component, among which the first lifting device 709, the second lifting device 711, the first telescopic device 805 and the second telescopic device 808 are electric telescopic rods.

[0047] When in use, the first rotating motor is controlled to work, driving the lower grinding disc to rotate, and then the bean material to be crushed and ground is sent into the bean bin body, and then enters between the upper grinding disc and the lower grinding disc through the supporting connection sleeve, the supporting plug sleeve and the inner side of the upper grinding disc for crushing and grinding, and the crushed and ground bean powder is discharged into the powder receiving disc on the powder receiving rack through the powder outlet and the powder outlet pipe;

[0048] By controlling the second rotating motor to work, the transmission worm is driven to rotate under the cooperation of the first bevel gear and the second bevel gear, and the height of the upper grinding disc is adjusted under the drive of the transmission gear disc to adjust the distance between the upper grinding disc and the lower grinding disc, so as to control and adjust the coarseness of the bean powder crushing and grinding;

[0049] By controlling the third rotating motor to work, the transmission gear, the lifting support rod and the transmission tooth groove on the lifting support rod cooperate to enable the lifting support rod to be lifted and lowered, thereby driving the powder pressing head to press the bean powder in the powder receiving tray below;

[0050] The bean bin body, the support connecting sleeve and the support plug-in sleeve are combined into an integrated structure, which is stable and firm and convenient for plugging and matching with the inner side of the upper grinding disc. The limiting protrusion arranged on the supporting connecting sleeve can be plugged into the plug-in slide groove on the supporting limiting ring and finally enter the annular limiting groove, and then the bean bin body is rotated to complete the fixed limit of the bean bin body. At the same time, the supporting limiting ring can, under the cooperation of the first lifting support plate and the first lifting device, drive the bean bin body, the supporting connecting sleeve and the supporting plug-in sleeve to rise and fall, adjust the plug-in matching state of the supporting plug-in sleeve and the upper grinding disc, and drive the supporting plug-in sleeve to plug and match with the inner side of the upper grinding disc during normal crushing and grinding, so as to clean the grinding bin body. When the second lifting device is lowered, the support plug sleeve is driven to rise and away from the upper grinding disc, so that the sealing plate is driven to move by the second lifting device and the fourth rotating motor to adjust it to the upper part of the upper grinding disc, and finally the first lifting device is controlled to drive the bean bin body, the support connecting sleeve and the support plug sleeve to descend, and pressure is applied to the sealing cover through the support plug sleeve. Since the output end of the second lifting device passes through the second lifting support plate to install the limited position block, the output end of the second lifting device is plug-connected with the second lifting support plate. Therefore, the second lifting device will not apply pressure to the sealing cover during the overall descent process, but will apply relatively uniform pressure to the sealing cover by driving the support plug sleeve to descend, so as to ensure the sealing effect;

[0051] When the bean material is crushed and ground normally, the third limiting plug-in rod and the third supporting plug-in rod are plugged into and matched with the T-shaped plug-in hole, the blocking block is located in the T-shaped plug-in hole, and the arc surface at one end of the blocking block is on the same arc surface as the inner surface of the grinding bin body, so as to block the T-shaped plug-in hole and prevent leakage of bean powder; after use, when the inside of the grinding bin body needs to be cleaned, the second rotating motor is controlled to work, and the transmission worm is driven to rotate under the cooperation of the first bevel gear and the second bevel gear, and the height of the upper grinding disc is adjusted under the drive of the transmission gear disc, so that there is a certain distance between the upper grinding disc and the lower grinding disc, and at the same time, the first telescopic device and the second telescopic device corresponding to the position of the third limiting plug-in rod are controlled to respectively drive the movable support plate and the third limiting plug-in rod to retreat, so that the blocking block leaves the T-shaped plug-in hole, and then the fifth rotating motor is controlled to drive the rotating support mounting plate to rotate, and the first limiting plug-in rod is adjusted to the highest point, so that it is coaxial with the T-shaped plug-in hole, and then the first telescopic device corresponding to the position of the first limiting plug-in rod is controlled. The first and second telescopic devices respectively drive the movable support plate and the first limit plug-in rod forward, adjust the water spray head to the inner side of the plug-in hole body, and with the cooperation of the water pump, draw out the cleaning water in the water storage tank, pass through the water pipe, the first connector and the first channel in sequence, and finally spray out through the water spray head to rinse the inside of the grinding bin body; after rinsing the inside of the grinding bin body, the first telescopic device and the second telescopic device corresponding to the position of the first limit plug-in rod are controlled to respectively drive the movable support plate and the first limit plug-in rod backward to take them away from the T-shaped plug-in hole, and then the fifth rotating motor is controlled to drive the rotating support mounting plate to rotate, adjust the second limit plug-in rod to the highest point to make it coaxial with the T-shaped plug-in hole, and then the first telescopic device and the second telescopic device corresponding to the position of the second limit plug-in rod are controlled to respectively drive the movable support plate and the second limit plug-in rod forward to send the spray head into the inner side of the plug-in hole body, and with the cooperation of the hot air blower, the inside of the grinding bin body is blown and dried to complete the cleaning operation of the grinder.

[0052] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0053] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A self-cleaning coffee bean grinder, comprising a housing (1), characterized in that: A supporting partition (2) is arranged inside the shell (1); an L-shaped supporting mounting plate (3) is arranged at the bottom of one lateral end of the supporting partition (2); a grinding assembly (4) is arranged at the other end; a powder receiving frame (5) is arranged on the inner surface of one lateral side of the L-shaped supporting mounting plate (3); a powder receiving port is provided on one lateral side of the shell (1) corresponding to the powder receiving frame (5); a powder pressing assembly (6) is arranged at the top of the supporting partition (2) corresponding to the position of the powder receiving frame (5); a bean silo assembly (7) is arranged at the top of the grinding assembly (4); a plurality of cleaning assemblies (8) are symmetrically arranged on both sides of the grinding assembly (4); a water storage tank (9) is arranged on the inner surface of the bottom of the shell (1) corresponding to the position of the grinding assembly (4); a water pump (10) is arranged on one longitudinal side of the water storage tank (9); a hot air blower (11) is arranged on one lateral side of the water pump (10); and a control device (12) is arranged on the outer surface of the shell (1) above the powder receiving port.

2. The self-cleaning coffee grinder according to claim 1, characterized in that: The grinding assembly (4) comprises a grinding chamber body (401), the bottom of the grinding chamber body (401) is connected to the top of the supporting baffle (2), a first rotating motor (402) is arranged at the bottom of the supporting baffle (2), the top output end of the first rotating motor (402) passes through the supporting baffle (2) and the bottom of the grinding chamber body (401) in sequence, and a lower grinding disc (403) is installed thereafter, a rotating seal is arranged between the output end of the first rotating motor (402) and the grinding chamber body (401), an upper grinding disc (404) is threadedly connected to the top of the grinding chamber body (401), a driving gear disc (405) is arranged on the circumferential outer surface of the upper grinding disc (404) located above the grinding chamber body (401), a powder outlet is arranged on one side of the grinding chamber body (401) which is laterally close to the powder receiving frame (5), and a lower grinding disc (403) is arranged on the other side. A support mounting frame (406) is provided, a powder outlet pipe (407) is provided at an angle downward at the powder outlet, one end of the powder outlet pipe (407) extends into the inner side of the L-shaped support mounting plate (3), a transmission worm (408) is provided above the support mounting frame (406), a rotating support plate is provided at both ends of the transmission worm (408), the transmission worm (408) is meshed with the transmission gear plate (405), one end of the transmission worm (408) extends to the outer side of the rotating support plate and is provided with a first bevel gear (409), a second rotating motor (410) is installed at the bottom of one end of the support mounting frame (406), a second bevel gear (411) is installed at the top output end of the second rotating motor (410) extends to the top of the support mounting frame (406), and the first bevel gear (409) is meshed with the second bevel gear (411).

3. The self-cleaning coffee grinder according to claim 1, characterized in that: The powder pressing assembly (6) comprises a fixed socket (601), wherein the fixed socket (601) is arranged at a position on the top of the supporting partition corresponding to the powder receiving frame (5), a powder pressing head (602) is plugged and installed at the bottom of the fixed socket (601), the position of the supporting partition (2) corresponding to the powder pressing head (602) is a hollow structure, a transmission box (603) is arranged on the top of the fixed socket (601), and a lifting support rod (604) is arranged on the top of the powder pressing head (602), and the fixed socket (601) and the transmission box (603) are both vertically connected to the lifting support rod (604). The lifting support rod (604) is plug-in connected in a plug-in manner, a plug-in limit platform (605) is arranged on one side of the lifting support rod (604), and a plurality of transmission tooth grooves (606) are arranged equidistantly from top to bottom on the other side, the fixed plug seat (601) and the transmission box (603) are plug-in connected with the transmission tooth grooves (606) in a vertical direction, and a third rotating motor (607) is arranged on the outer surface of one longitudinal side of the transmission box (603), and the output end of the third rotating motor (607) extends into the inner side of the transmission box (603) and is installed with a transmission gear (608), and the transmission gear (608) is meshed with the transmission tooth groove (606).

4. The self-cleaning coffee grinder according to claim 2, characterized in that: The bean bin assembly (7) comprises a bean bin body (701) arranged above the grinding bin body (401), the bean bin body (701) is plug-connected with the top of the shell (1), the lower half of the bean bin body (701) is a conical structure with a larger top and a smaller bottom, a support connection sleeve (702) is arranged at the bottom of the bean bin body (701), a support plug sleeve (703) is arranged at the bottom of the support connection sleeve (702), one end of the support plug sleeve (703) is plug-connected with the inner side of the upper grinding disc (404), and a support limiter is plug-connected on the outer side of the support connection sleeve (702). The support connecting sleeve (702) is provided with at least two limiting protrusions (705) equidistantly on its outer surface, and an annular limiting groove (706) is provided on its inner surface. The inner surface of the support limiting ring (704) is provided with a plug-in slide groove (707) corresponding to the position of the limiting protrusion (705), and the plug-in slide groove (707) is connected to the annular limiting groove (706). The support limiting ring (704) is symmetrically provided with a first lifting support plate (708) on both sides in the transverse direction, and the top of the first lifting support plate (708) is aligned with the top of the shell (1). A first lifting device (709) is arranged between the inner surfaces; one end of the first lifting support plate (708) on the lateral side of the support limiting ring (704) is slidably connected to the inner surface of the lateral side of the shell (1) in the vertical direction; a second lifting support plate (710) is arranged below the first lifting support plate (708) on the other side; a second lifting device (711) is arranged at the bottom of the first lifting support plate (708); an output end of the second lifting device (711) passes through the second lifting support plate (710) to install a limiting block (712); the second lifting device (711) 11) The output end is plug-connected with the second lifting support plate (710); a fourth rotating motor (713) is arranged at the top of one end of the second lifting support plate (710) close to the supporting plug sleeve (703); a guide plug rod (714) is arranged at the top of the other end; the guide plug rod (714) is plug-connected with the first lifting support plate (708); the output end at the bottom of the fourth rotating motor (713) extends to the bottom of the second lifting support plate (710) and a rotating support plate (715) is installed; a sealing cover (716) is arranged at one end of the rotating support plate (715).

5. The self-cleaning coffee grinder according to claim 2, characterized in that: The cleaning assembly (8) comprises a T-shaped plug hole (801) and a movable support plate (802) radially arranged on the wall of the grinding chamber body (401); the length direction of the movable support plate (802) is perpendicular to the axial direction of the T-shaped plug hole (801); the bottom of the movable support plate (802) is slidably connected to the top of the support partition (2) along the axial direction of the T-shaped plug hole (801); the T-shaped plug hole (801) comprises a plug hole body (8011) and a limit plug hole (8012) connected thereto; one end of the plug hole body (8011) is connected to the inner side of the grinding chamber body (401); one end of the limit plug hole (8012) is connected to the outer side of the grinding chamber body (401); A protective support box (803) is arranged on the outer side of the movable support plate (802); a support rotating seat (804) is arranged on the movable support plate (802) at a position corresponding to the T-shaped plug hole (801); a first telescopic device (805) is arranged between the support rotating seat (804) and the inner surface of the protective support box (803); a rotating shaft is arranged on the support rotating seat (804) above the first telescopic device (805); a rotating support mounting plate (806) is arranged at one end of the rotating shaft close to the T-shaped plug hole (801); a fifth rotating motor (807) is installed on the surface of the support rotating seat (804) on a side away from the rotating support mounting plate (806); the fifth rotating motor (807) The output end is connected to one end of the rotating shaft, and three second telescopic devices (808) are equidistantly arranged on the circumference of the surface of the rotating support mounting plate (806) close to the supporting rotating seat (804). The output ends of the three second telescopic devices (808) pass through the rotating support mounting plate (806) and are sequentially installed with a first limiting plug-in rod (809), a second limiting plug-in rod (810) and a third limiting plug-in rod (811). The first limiting plug-in rod (809), the second limiting plug-in rod (810) and the third limiting plug-in rod (811) are respectively arranged at one end away from the rotating support mounting plate (806) with a first supporting plug-in rod (812), a second supporting plug-in rod (813) and a third supporting plug-in rod (814). 14), the first support plug rod (812), the second support plug rod (813) and the third support plug rod (814) are respectively provided with a water spray head (815), an air spray head (816) and a blocking block (817) at one end away from the rotating support mounting plate (806), a first channel (818) and a second channel (819) are respectively provided between the first limit plug rod (809) and the first support plug rod (812) and between the second limit plug rod (810) and the second support plug rod (813), and a first connector (820) and a second connector (821) are respectively provided at one end of the first limit plug rod (809) and the second limit plug rod (810),The water spray head (815) and one end of the first connector (820) are both connected to the first channel (818), the spray head (816) and one end of the second connector (821) are both connected to the second channel (819), the input end of the water pump (10) is connected to the inside of the water storage tank (9) through a water pipe, and the output end is connected to the other end of the first connector (820) through a water pipe, and the output end of the hot air blower (11) is connected to the other end of the second connector (821) through an air pipe. The outer surfaces of both sides of the support rotating seat (804) are provided with L-shaped fixed mounting plates (822), and one end of the L-shaped fixed mounting plate (822) is equidistantly provided with a plurality of bull's eye balls (823) from top to bottom, and the outer surface of the bull's eye balls (823) is in contact with the surface of one side of the rotating support mounting plate (806).

6. The self-cleaning coffee grinder according to claim 5, characterized in that: The movable support plate (802) and the support rotating seat (804) as well as the support rotating seat (804) and the L-shaped fixed installation plate (822) are fixedly connected by welding.

7. The self-cleaning coffee grinder according to claim 5, characterized in that: The outer diameters of the first limiting plug-in rod (809), the second limiting plug-in rod (810) and the third limiting plug-in rod (811) match the inner diameter of the limiting plug-in hole (8012) to form a plug-in fit.

8. The self-cleaning coffee grinder according to claim 5, characterized in that: The outer diameters of the first supporting plug-in rod (812), the second supporting plug-in rod (813) and the third supporting plug-in rod (814) match the inner diameter of the plug-in hole body (8011) to form a plug-in fit.

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