A grinder

Abstract

The application discloses a grinding machine, which comprises a grinding mechanism, the grinding mechanism comprises a grinding container, the grinding container is internally provided with a fixed upper cutter disc and a lower cutter disc capable of moving up and down, the lower cutter disc is fixedly arranged above a lower seat, the lower seat is located in the grinding container, and a lifting assembly is arranged below the grinding container; the lifting assembly comprises a supporting bearing, a supporting seat, a screw sleeve and a rotating mechanism, the radial distance between the outer circumferential surface of the screw sleeve and the axis line thereof gradually decreases or increases in the clockwise direction; the outer circumferential surface of the screw sleeve is in contact with the bottom surface of the supporting seat, the supporting bearing is arranged on a bearing step in the supporting seat, and the top of the supporting bearing is in contact with the bottom of the lower seat; and the rotating mechanism is used for driving the screw sleeve to rotate, so that the supporting seat moves up and down, and the supporting bearing, the lower seat and the lower cutter disc move up and down together. The grinding machine can improve the adjusting speed.

Description

Technical Field

[0001] This utility model relates to the field of food processing technology, and more specifically to a grinding machine. Background Technology

[0002] A grinder typically consists of two blades, an upper and a lower one. A motor drives the blades to rotate, creating a cutting motion that grinds the food into powder. The distance between the upper and lower blades determines the fineness of the powder. While existing grinders allow adjustment of the grind fineness by adjusting the distance between the upper and lower blades, this is usually achieved by using an inclined plane to move up and down, thus adjusting the distance between the two blades. However, the sliding action between the two inclined planes is time-consuming, resulting in slow adjustment. Furthermore, the knob for adjusting the fineness is connected to a lower slider via a shaft and threaded connection. This threaded structure causes uneven operating force, poor feel, and a complex and costly design. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings of the prior art, the present invention provides a grinding machine that can improve the adjustment speed.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a grinding machine, including a grinding mechanism, the grinding mechanism including a grinding container, a fixed upper cutter disc and a lower cutter disc that can move up and down are provided in the grinding container, the lower cutter disc is fixedly set above the lower seat, the lower seat is located in the grinding container, and a lifting assembly is provided below the grinding container; the lifting assembly includes a support bearing, a support base, a spiral sleeve and a rotating mechanism, the radial distance between the outer peripheral surface of the spiral sleeve and its axis gradually decreases or increases in the clockwise direction; the outer peripheral surface of the spiral sleeve is in contact with the bottom surface of the support base, the support bearing is set on the bearing step in the support base, and the top of the support bearing is in contact with the bottom of the lower seat; the rotating mechanism is used to drive the spiral sleeve to rotate, so that the support base moves up and down, so that the support bearing, the lower seat and the lower cutter disc move up and down together.

[0005] The grinding machine provided by this technical solution uses a lifting assembly including a support bearing, a support seat, a spiral sleeve, and a rotating mechanism to lift the lower cutter disc. The rotating mechanism directly drives the spiral sleeve to rotate, and the radial distance between the outer circumferential surface of the spiral sleeve and its axis changes to move the support seat up and down, which can improve the adjustment speed.

[0006] In a preferred embodiment, the rotating mechanism includes a knob shaft and a knob; one end of the knob shaft is fixedly connected to the knob, and the other end is fixedly connected to a screw sleeve, the axis of the screw sleeve being coaxial with the axis of the rotating shaft. In this technology, the rotating mechanism includes a knob shaft and a knob, with the knob and screw sleeve respectively fixedly connected to both ends of the knob shaft. When the knob is rotated, the screw sleeve rotates synchronously with the knob, resulting in uniform knob operation force, better feel, and a simple structure with low cost.

[0007] In a preferred embodiment, the grinding mechanism further includes a motor, with the grinding container fixedly connected to the upper end of the motor; a motor bearing is slidably fitted on the motor shaft, the motor bearing passing through the central hole of the support bearing, and the lower seat fixedly fitted on the motor bearing; the motor shaft has a motor shaft hole, and the motor bearing has an elongated bearing side hole; a pin passes through the motor shaft hole and the bearing side hole to connect the motor shaft and the motor bearing together, resulting in a simple structure, convenient assembly, and low cost.

[0008] In a preferred embodiment, a support seat is fitted over a support bearing, which is fitted onto the motor bearing. The outer ring of the support bearing rests on a bearing step, and neither the outer ring nor the support seat contacts the lower seat. The inner ring of the support bearing is located within a through hole in the center of the support seat, with its top contacting the bottom of the lower seat. In this technology, when the motor shaft rotates, the inner ring of the support bearing rotates synchronously with the motor bearing, the lower seat, and the lower cutter disc. However, the outer ring of the support bearing, located on the bearing step, does not rotate, and the support seat does not rotate either, thus avoiding the influence of the motor shaft rotation on the support seat. Furthermore, the outer ring of the support bearing and the support seat do not rub against the lower seat, preventing any impact on the grinding operation and ensuring the working stability of the grinding machine.

[0009] In a preferred embodiment, the outer peripheral wall of the support base mates with the central through hole at the bottom of the grinding container, facilitating the raising or lowering of the support base and adjusting the gap between the lower and upper cutter discs to adjust the fineness of the grinding powder. A raised ring is provided on the outer peripheral wall of the support base. When the support base is raised to its highest position, the top surface of the raised ring contacts the outer bottom surface of the grinding container, which serves as a limit and helps to prevent the lower cutter disc from moving too high and rubbing against the upper cutter disc, causing damage.

[0010] In a preferred embodiment, the edge of the central through hole is provided with an upwardly protruding annular boss, the bottom center of the lower seat is provided with a circular recess, the sidewall of the circular recess is fastened to the outside of the annular boss, and the outer sidewall of the support seat is located inside the annular boss; the top of the annular boss is provided with a sealing ring, the sealing ring is located between the support seat and the lower seat, and the outer sidewall of the sealing ring is tightly attached to the inner sidewall of the circular recess, thus isolating the inner cavity of the grinding container from its central through hole and preventing the ground food from leaking out.

[0011] In a preferred embodiment, the knob shaft is arranged horizontally, and a support side tube is fitted onto the knob shaft. The knob and the screw sleeve are located at opposite ends of the support side tube, which is situated on the upper side of the motor. This simplifies the structure and reduces costs. By protecting the knob shaft with the support side tube, this technology ensures the stability of the rotating mechanism and extends the product's service life.

[0012] In a preferred embodiment, the grinder further includes a housing for accommodating the grinding mechanism, and the rotating mechanism further includes a knob bearing and a knob seat; the knob seat is fixed to the housing, and the knob is fitted onto the knob seat for easy installation; the knob bearing is fitted onto the end of the knob shaft near the knob and located between the support side tube and the knob shaft, which helps to reduce rotational resistance and allows the knob to rotate more smoothly.

[0013] In a preferred embodiment, the grinding container has a powder outlet on its side, and a downwardly inclined powder outlet pipe is connected to the powder outlet. The powder outlet pipe is connected to the inner cavity of the grinding container through the powder outlet and is used to discharge the ground powder.

[0014] In a preferred embodiment, the inner diameter of the lower cutter head is 30% to 70% of the outer diameter of the lower cutter head, leaving installation space for the lower seat and motor shaft, etc.

[0015] As can be seen from the above technical solution, compared with the prior art, the beneficial effects of this utility model are as follows: The grinding machine provided by this utility model, the grinding machine provided by this technical solution, realizes the lifting and lowering of the lower blade disc through a lifting assembly including a support bearing, a support seat, a spiral sleeve and a rotating mechanism. The rotating mechanism directly drives the spiral sleeve to rotate, and uses the change in the radial distance between the outer circumferential surface of the spiral sleeve and its axis to drive the support seat to move up and down, which can improve the adjustment speed. Furthermore, the rotating mechanism includes a knob shaft and a knob. The knob and the spiral sleeve are respectively fixedly connected to the two ends of the knob shaft. When the knob is rotated, the spiral sleeve rotates synchronously with the knob. The knob operation force is uniform, the feel is better, and the structure is simple and the cost is low.

[0016] In addition, other advantages of this invention will be set forth in the description which follows, in part will be obvious from the description, or may be learned by practice of this invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1This is an overall outline drawing of the grinding machine of this utility model;

[0019] Figure 2 This is a schematic diagram of the grinding machine of this utility model in the lower cutter head descending state;

[0020] Figure 3 for Figure 2 A magnified view of a portion of the lifting assembly;

[0021] Figure 4 for Figure 2 A partial enlarged view of the middle support seat and support bearing area;

[0022] Figure 5 This is a schematic diagram of the grinding machine of this utility model in the state of the lower cutter head rising;

[0023] Figure 6 for Figure 5 A magnified view of a portion of the lifting assembly;

[0024] Figure 7 for Figure 5 A partial enlarged view of the middle support seat and support bearing area;

[0025] Figure 8 This is a schematic diagram of the grinding machine of this utility model in the powder dispensing state;

[0026] Figure 9 This is a schematic diagram of the lower cutter head and lifting assembly of this utility model;

[0027] Figure 10 This is a schematic diagram of the lower cutter head of this utility model;

[0028] Figure 11 This is a schematic diagram of the grinding container of this utility model;

[0029] Figure 12 This is a schematic diagram of the structure of the support base of this utility model;

[0030] Figure 13 This is an exploded view of the lifting component of this utility model;

[0031] Figure 14 This is an exploded view of the grinding machine of this utility model;

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Funnel; 2. Upper seat; 3. Upper cutter head; 4. Lower cutter head; 5. Lower seat; 6. Fixing plate; 7. Grinding container; 71. Inner cavity; 72. Powder outlet; 73. Central through hole; 8. Motor bearing; 81. Bearing side hole; 9. Pin; 10. Support bearing; 11. Sealing ring; 12. Support seat; 121. Outer peripheral wall; 122. Convex ring; 123. Inner wall; 124. Bearing step; 13. Spiral sleeve; 14. Knob shaft; 15. Knob bearing; 16. Knob seat; 17. Knob; 18. Motor; 181. Motor shaft; 182. Motor shaft hole; 183. Support side tube; 19. Powder outlet pipe; 20. Front cover; 21. Outer shell; 22. Display screen; 23. Power switch; 24. Bottom cover; 25. Support leg; 26. Electronic board support; 27. Electronic board. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] In the description of this utility model, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] Reference Figure 1-14 This invention describes a grinder according to an embodiment of the present invention, which has adjustable grinding fineness and is used in food processing machines, such as commercial tea grinders and coffee grinders.

[0037] In one embodiment, such as Figure 1-14 As shown, a grinding machine includes a grinding mechanism, which includes a grinding container 7. The grinding container 7 is provided with a fixed upper cutter disc 3 and a lower cutter disc 4 that can move up and down. The lower cutter disc 4 is fixed above a lower base 5. The lower base 5 is located inside the grinding container 7. A lifting component is provided below the grinding container 7.

[0038] The lifting assembly includes a support bearing 10, a support base 12, a spiral sleeve 13, and a rotating mechanism. The radial distance between the outer peripheral surface of the spiral sleeve 13 and its axis gradually decreases or increases in the clockwise direction. The outer peripheral surface of the spiral sleeve 13 is in contact with the bottom surface of the support base 12. The support bearing 10 is located on the bearing step 124 inside the support base 12. The top of the support bearing 10 is in contact with the bottom of the lower seat 5.

[0039] The rotating mechanism is used to drive the spiral sleeve 13 to rotate, so that the support seat 12 moves up and down, so that the support bearing 10, the lower seat 5 and the lower cutter head 4 move up and down together.

[0040] The outer circumferential surface of the spiral sleeve 13 may be provided with a protruding ridge. The radial distance between the outer circumferential surface and the axis gradually decreases in a clockwise direction starting from the highest point of the protruding ridge, or the radial distance between the outer circumferential surface and the axis gradually increases in a clockwise direction starting from the lowest point of the bottom of the protruding ridge until the highest point of the protruding ridge. The lower end surface of the support seat 12 is also a horizontal surface and is in contact with the outer circumferential surface of the spiral sleeve 13. Specifically, the outer circumferential wall of the support bearing 10 may be in contact with the inner wall 123 of the support seat 12. The inner wall 123 plays a limiting role, making the support bearing 10 more stably installed.

[0041] Specifically, since the bottom surface of the support seat 12 is in contact with the outer peripheral surface of the spiral sleeve 13, when the spiral sleeve 13 rotates, the support seat 12 moves up and down accordingly, causing the support bearing 10 provided on the bearing step 124 to move up and down. The top of the support bearing 10 abuts against the bottom of the lower seat 5. Therefore, when the support bearing 10 rises, it pushes the lower seat 5 and the lower cutter head 4 to move upward together. When the support bearing 10 falls, the lower seat 5 and the lower cutter head 4 lose their support force and move downward together under the action of gravity. When the top of the protruding part on the outer peripheral surface of the spiral sleeve 13 abuts against the bottom surface of the support seat 12, the support seat 12 is at its highest reachable position, which allows the lower seat 5 to be at its highest position. At this time, the lower cutter head 4 and the upper cutter head 3 are almost completely in contact.

[0042] In specific implementation, a funnel 1 for feeding is provided above the grinding container 7. The discharge port at the lower end of the funnel 1 is connected to the inner cavity 71 of the grinding container 7. The upper cutter disc 3 is fixedly installed on the upper part of the inner cavity 71 of the grinding container 7, and the lower cutter disc 4 is movably installed on the lower part of the inner cavity 71 of the grinding container 7. Furthermore, the upper cutter disc 3 can be fixedly installed below the fixing plate 6 through the upper seat 2, and the fixing plate 6 is located above the grinding container 7.

[0043] The above embodiment provides a grinding machine that uses a lifting assembly including a support bearing 10, a support base 12, a spiral sleeve 13, and a rotating mechanism to lift the lower blade disc 4. The rotating mechanism directly drives the spiral sleeve 13 to rotate, and the radial distance between the outer circumferential surface of the spiral sleeve 13 and its axis changes to move the support base 12 up and down, which can improve the adjustment speed.

[0044] In this embodiment, the rotating mechanism includes a knob shaft 14 and a knob 17. One end of the knob shaft 14 is fixedly connected to the knob 17, and the other end is fixedly connected to a screw sleeve 13. The axis of the screw sleeve 13 is coaxial with the axis of the rotating shaft. When the knob 17 is rotated, the screw sleeve 13 and the knob 17 rotate synchronously. The knob 17 operates with uniform force, provides a better feel, and has a simple structure and low cost.

[0045] In this embodiment, the grinding mechanism also includes a motor 18, and the grinding container 7 is fixedly connected to the upper end of the motor 18. A motor bearing 8 is slidably sleeved on the motor shaft 181 of the motor 18. The motor bearing 8 passes through the central hole of the support bearing 10, and the lower seat 5 is fixedly sleeved on the motor bearing 8. The motor shaft 181 is provided with a motor shaft hole 182, and the motor bearing 8 is provided with a long and narrow bearing side hole 81. The pin 9 passes through the motor shaft hole 182 and the bearing side hole 81 to connect the motor shaft 181 and the motor bearing 8 together. The structure is simple, the assembly is convenient, and the cost is low.

[0046] The bearing side hole 81 can be a strip hole with an open bottom or a strip hole with closed ends. When the motor 18 is working, the motor shaft 181 rotates, which drives the motor bearing 8 to rotate synchronously through the pin 9, thereby driving the lower seat 5 and the lower cutter disc 4 to rotate together to realize the grinding operation.

[0047] When the user adjusts the grinding fineness, the motor 18 stops working. When the support bearing 10 of the lifting component moves up and down, the lower seat 5 also moves up and down. Since the lower seat 5 is fixedly sleeved on the motor bearing 8, that is, the two are fixedly connected, the motor bearing 8 and the lower seat 5 move up and down together. That is, the motor bearing 8 slides up and down along the motor shaft 181. During this process, the pin 9 can move vertically along the elongated bearing side hole 81, so that the motor shaft 181 and the motor bearing 8 maintain a connection structure that can rotate synchronously.

[0048] In this embodiment, the support seat 12 is sleeved on the outside of the support bearing 10, and the support bearing 10 is sleeved on the motor bearing 8; the outer ring of the support bearing 10 is placed on the bearing step 124, and neither the outer ring of the support bearing 10 nor the support seat 12 contacts the lower seat 5; the inner ring of the support bearing 10 is located in the through hole in the middle of the support seat 12, and the top of the inner ring of the support bearing 10 contacts the bottom of the lower seat 5.

[0049] The support bearing 10 is fixedly sleeved on the motor bearing 8, meaning that the inner ring of the support bearing 10 can rotate together with the motor bearing 8. The inner ring of the support bearing 10 is located in the through hole in the middle of the support seat 12 and does not contact the body of the support seat 12. The outer ring of the support bearing 10, which is placed on the bearing step 124, does not rotate, thereby avoiding the influence of the rotation of the motor shaft 181 on the support seat 12. Furthermore, since neither the outer ring of the support bearing 10 nor the support seat 12 contacts the lower seat 5, there will be no friction with the lower seat 5, which will not affect the grinding operation and can ensure the working stability of the grinding machine.

[0050] Specifically, when the motor shaft 181 rotates, the inner ring of the support bearing 10 can rotate synchronously with the motor bearing 8, the lower seat 5, and the lower cutter disc 4, but the outer ring of the support bearing 10 located on the bearing step 124 does not rotate, and the support seat 12 does not rotate either, but remains in the same position.

[0051] In this embodiment, the outer peripheral wall 121 of the support base 12 cooperates with the central through hole 73 at the bottom of the grinding container 7, which facilitates the rise or fall of the support base 12, realizes the gap adjustment between the lower cutter disc 4 and the upper cutter disc 3, and thus adjusts the fineness of the grinding powder.

[0052] A raised ring 122 is provided on the outer peripheral wall 121 of the support base 12. When the support base 12 rises to the highest position, the top surface of the raised ring 122 contacts the outer bottom surface of the grinding container 7, which plays a limiting role and helps to prevent the lower cutter 4 from rising excessively and rubbing against the upper cutter 3, causing damage.

[0053] In this embodiment, the edge of the central through hole 73 is provided with an upwardly protruding annular boss, the bottom center of the lower seat 5 is provided with a circular recess, the side wall of the circular recess is fastened to the outside of the annular boss, and the outer side wall of the support seat 12 is located inside the annular boss.

[0054] A sealing ring 11 is provided on the top of the annular boss. The sealing ring 11 is located between the support base 12 and the lower base 5, and the outer wall of the sealing ring 11 is in close contact with the inner wall of the circular recess, which isolates the inner cavity 71 of the grinding container 7 from its central through hole 73 to prevent the ground food from leaking out.

[0055] Specifically, when the support base 12 and the lower base 5 move up and down, the sealing ring 11 is located on the top of the annular boss, and its position remains unchanged. It is always between the support base 12 and the lower base 5, which isolates the inner cavity 71 of the grinding container 7 from its central through hole 73, thereby preventing the ground food from leaking out.

[0056] In this embodiment, the knob shaft 14 is arranged horizontally, and a support side tube 183 is sleeved on the knob shaft 14. The knob 17 and the screw sleeve 13 are located at the two ends of the support side tube 183, which is located on the upper side of the motor 18. The support side tube 183 protects the knob shaft 14, ensuring the stability of the rotating mechanism and extending the product's service life.

[0057] In this embodiment, the grinder further includes a housing 21 accommodating the grinding mechanism, and the rotating mechanism further includes a knob bearing 15 and a knob seat 16. The knob seat 16 is fixed to the housing 21, and the knob 17 is sleeved on the knob seat 16. The knob bearing 15 is sleeved on the end of the knob shaft 14 near the knob 17 and located between the support side tube 183 and the knob shaft 14, which helps to reduce rotational resistance and allows the knob 17 to rotate more smoothly. The connection structure between the knob seat 16 and the knob 17 can adopt existing knob mounting methods, which are not limited in this embodiment. The knob 17 is located on the outer surface of the housing 21 for user convenience. Specifically, the knob 17 can rotate circumferentially, thereby driving the spiral sleeve 13 to rotate via the knob shaft 14.

[0058] In this embodiment, a powder outlet 72 is provided on the side of the grinding container 7. A downwardly inclined powder outlet pipe 19 is connected to the powder outlet 72. The powder outlet pipe 19 communicates with the inner cavity 71 of the grinding container 7 through the powder outlet 72 and is used to discharge the ground powder.

[0059] In this embodiment, the inner diameter of the lower cutter head 4 is 30% to 70% of the outer diameter of the lower cutter head 4, leaving installation space for the lower seat 5 and the motor shaft 183, etc.

[0060] In practice, the inner diameter of the lower cutter head 4 can be 30%, 50% or 70% of the outer diameter of the lower cutter head 4. Technicians can also select different specifications of lower cutter head 4 according to actual needs.

[0061] In the aforementioned grinding machine, the outer casing 21 has a front cover 20 on the front, a power switch 23 on the side, and a bottom cover 24 at the bottom, with support feet 25 below the bottom cover 24. The outer casing 21, front cover 20, and bottom cover 24 form a housing for the grinding mechanism. Inside the housing, there is an electronic board support 26 and an electronic board 27. A display screen 22 is mounted on the front cover 20. The power switch 23 is connected to the electronic board 27, and the electronic board 27 is connected to the display screen 22. The electronic board 27, display screen 22, and power switch 23 can be implemented using existing equipment.

[0062] In practice, users can control the grinding machine through the display screen 22.

[0063] Based on the above embodiments, when the grinding fineness of the grinding machine provided by this utility model needs to be adjusted, only the knob 17 needs to be rotated. The knob 17 drives the spiral sleeve 13 to rotate synchronously through the knob shaft 14. Since the radial distance between the outer circumference of the spiral sleeve 3 and its axis gradually decreases or increases in the clockwise direction, the spiral sleeve 13 rotates while driving the support base 12 to move up and down. This causes the support bearing 10 on the bearing step 124 inside the support base 12 to move up and down synchronously. When the support bearing 10 moves up, it pushes the lower seat 5 and the lower cutter disc 4 to move up together. When the support bearing 10 moves down, the lower seat 5 and the lower cutter disc 4 lose support and also move down together under the action of gravity, thereby adjusting the distance between the upper cutter disc 3 and the lower cutter disc 4.

[0064] Other components and operations of the grinding machine according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0065] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0066] In the description of this specification, references to the terms "embodiment," "specific embodiment," "example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention.

[0067] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined with each other in any suitable manner in one or more embodiments or examples without interference or contradiction.

Claims

1. A grinding machine, comprising a grinding mechanism, characterized in that: The grinding mechanism includes a grinding container (7), which has a fixed upper blade (3) and a lower blade (4) that can move up and down. The lower blade (4) is fixed above the lower seat (5), which is located inside the grinding container (7). A lifting component is provided below the grinding container (7). The lifting assembly includes a support bearing (10), a support base (12), a spiral sleeve (13), and a rotating mechanism. The radial distance between the outer peripheral surface of the spiral sleeve (13) and its axis gradually decreases or increases in the clockwise direction. The outer peripheral surface of the spiral sleeve (13) is in contact with the bottom surface of the support base (12). The support bearing (10) is located on the bearing step (124) inside the support base (12). The top of the support bearing (10) is in contact with the bottom of the lower seat (5). The rotating mechanism is used to drive the spiral sleeve (13) to rotate, so that the support seat (12) moves up and down, so that the support bearing (10), the lower seat (5) and the lower cutter disc (4) move up and down together.

2. The grinding machine according to claim 1, characterized in that: The rotating mechanism includes a knob shaft (14) and a knob (17); One end of the knob shaft (14) is fixedly connected to the knob (17), and the other end is fixedly connected to the spiral sleeve (13). The axis of the spiral sleeve (13) is coaxial with the axis of the rotating shaft.

3. The grinding machine according to claim 2, characterized in that: The grinding mechanism also includes a motor (18), and the grinding container (7) is fixedly connected to the upper end of the motor (18); The motor shaft (181) of the motor (18) is slidably fitted with a motor bearing (8), which passes through the center hole of the support bearing (10), and the lower seat (5) is fixedly fitted on the motor bearing (8). The motor shaft (181) is provided with a motor shaft hole (182), and the motor bearing (8) is provided with a long strip-shaped bearing side hole (81). The pin (9) passes through the motor shaft hole (182) and the bearing side hole (81) to connect the motor shaft (181) and the motor bearing (8) together.

4. The grinding machine according to claim 3, characterized in that: The support seat (12) is sleeved on the outside of the support bearing (10), and the support bearing (10) is sleeved on the motor bearing (8); The outer ring of the support bearing (10) is placed on the bearing step (124), and neither the outer ring of the support bearing (10) nor the support seat (12) contacts the lower seat (5); The inner ring of the support bearing (10) is located in the through hole in the middle of the support seat (12), and the top of the inner ring of the support bearing (10) is in contact with the bottom of the lower seat (5).

5. The grinding machine according to claim 4, characterized in that: The outer peripheral wall (121) of the support base (12) is fitted with the central through hole (73) at the bottom of the grinding container (7); a convex ring (122) is provided on the outer peripheral wall (121) of the support base (12). When the support base (12) rises to the highest position, the top surface of the convex ring (122) contacts the outer bottom surface of the grinding container (7).

6. The grinding machine according to claim 5, characterized in that: The edge of the central through hole (73) is provided with an upwardly protruding annular boss, the bottom center of the lower seat (5) is provided with a circular recess, the side wall of the circular recess is fastened to the outside of the annular boss, and the outer side wall of the support seat (12) is located inside the annular boss. The top of the annular boss is provided with a sealing ring (11), which is located between the support seat (12) and the lower seat (5), and the outer wall of the sealing ring (11) is in close contact with the inner wall of the circular recess.

7. The grinding mill according to any one of claims 3 to 6, characterized in that: The knob shaft (14) is arranged horizontally, and a bracket side tube (183) is sleeved on the knob shaft (14). The knob (17) and the screw sleeve (13) are located at the two ends of the bracket side tube (183), and the bracket side tube (183) is located on the upper side of the motor (18).

8. The grinding machine according to claim 7, characterized in that: The grinding machine also includes a housing (21) for accommodating the grinding mechanism, and the rotating mechanism also includes a knob bearing (15) and a knob seat (16); The knob seat (16) is fixed on the outer shell (21), and the knob (17) is sleeved on the knob seat (16); the knob bearing (15) is sleeved on one end of the knob shaft (14) near the knob (17) and located between the bracket side tube (183) and the knob shaft (14).

9. The grinding machine according to claim 1, characterized in that: The grinding container (7) has a powder outlet (72) on its side, and a downwardly inclined powder outlet pipe (19) is connected to the powder outlet (72). The powder outlet pipe (19) communicates with the inner cavity (71) of the grinding container (7) through the powder outlet (72).

10. The grinding machine according to claim 1, characterized in that: The inner diameter of the lower cutter head (4) is equal to 30% to 70% of the outer diameter of the lower cutter head (4).

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