Grinding machine

Abstract

The utility model belongs to the technical field of grinding devices, and discloses a grinding machine which comprises a main machine, a motor, a movable grinding head and a static grinding head, and further comprises a lifting seat which is installed in an installation cavity, the movable grinding head is arranged above the lifting seat and driven by the lifting seat to ascend and descend in the axial direction of the motor, and the motor is located below the lifting seat. A rotating shaft of the motor penetrates through the lifting seat and is in transmission connection with the movable grinding head; the adjusting ring is connected to the periphery of the lifting seat in a sleeving mode, the inner side face of the adjusting ring is provided with an inner thread matched with the outer thread, and the outer side face of the adjusting ring is provided with an adjusting part exposed out of the main machine; the rotation stopping part is arranged in the mounting cavity so as to stop rotation and limit the lifting seat; the limiting groove is formed in the inner circumferential wall of the mounting cavity, and the adjusting ring is rotatably mounted in the limiting groove and axially limited by the limiting groove. Dynamic thickness adjustment is achieved, operation is more convenient and faster, the application range of the grinding machine is widened, adjusting precision is high, and the structure is stable.

Description

Technical Field

[0001] This utility model belongs to the technical field of grinding equipment, and specifically relates to a grinding mill. Background Technology

[0002] Existing grinders, such as some coffee machines, include a powder container and a main unit. The main unit is equipped with a motor and a grinding assembly. By providing a threaded assembly at the output end of the motor shaft where the moving grinding wheel is mounted, and referring to a coffee machine grinding fine adjustment structure disclosed in patent application number 202420193261.9, the axial position of the moving grinding wheel on the motor shaft can be changed by adjusting the threaded assembly, thereby changing the gap between the moving grinding wheel and the stationary grinding wheel to grind coffee powder of different coarseness.

[0003] However, when adjusting the coarseness of the grinding, users must separate the powder receiving cup from the main unit, forcing an interruption of the grinding operation. This makes the operation cumbersome and restricts the continuous operation capability of the grinder, resulting in low grinding efficiency. Especially in scenarios where users need to grind multiple medicinal materials, requiring different coarseness levels for grinding and mixing, existing grinders cannot dynamically adjust the grinding gap, leading to inconvenience for users and limiting their application range.

[0004] Furthermore, the existing grinding machine's adjustment mechanism works as follows: the moving grinding head is supported by a nut to achieve axial displacement adjustment. By tightening or loosening the nut, the support position of the moving grinding head is changed, thus adjusting its axial position. This results in insufficient locking stability of the nut after adjustment. Moreover, the moving grinding head must engage with the stationary grinding head with high friction while also engaging with the nut in a lifting and lowering manner, leading to poor adjustment accuracy and instability after adjustment. This causes the moving grinding head to shift or misalign, resulting in uneven contact of the grinding surface. During the grinding process, the moving grinding head wobbles and vibrates, indicating structural instability. Utility Model Content

[0005] This utility model provides a grinding machine that solves the problem that the existing coarseness adjustment mechanism requires the grinding operation to be interrupted, which makes the operation complicated. In addition, the moving grinding head has to take into account both the frictional engagement with the stationary grinding head and the lifting engagement with the nut, which leads to poor adjustment accuracy and unreliable grinding due to poor stability.

[0006] The technical solution adopted in this utility model is as follows:

[0007] This utility model provides a grinding machine, including a main unit with a mounting cavity, a motor located within the mounting cavity, and a movable grinding head and a stationary grinding head that cooperate with each other. The grinding machine further includes: a lifting seat, which is installed in the mounting cavity; the movable grinding head is disposed above the lifting seat and is driven by the lifting seat to move up and down along the axial direction of the motor; the motor is located below the lifting seat; the motor's rotating shaft passes through the lifting seat and is connected to the movable grinding head for transmission; the outer periphery of the lifting seat is provided with an external thread; an adjusting ring, which is sleeved on the outer periphery of the lifting seat; the inner side of the adjusting ring is provided with an internal thread that matches the external thread; the outer side of the adjusting ring is provided with an adjusting part exposed to the main unit; an anti-rotation part, which is disposed in the mounting cavity to limit the rotation of the lifting seat; and a limiting groove, which is disposed on the inner peripheral wall of the mounting cavity; the adjusting ring is rotatably mounted in the limiting groove and is axially limited by the limiting groove.

[0008] The grinder provided by this utility model features an adjusting ring and a lifting seat. The adjusting ring is exposed on the main unit's adjusting section, allowing users to operate it without disassembling the main unit. This enables dynamic coarseness adjustment. Specifically, the user rotates the adjusting ring through the adjusting section. The adjusting ring is axially limited within a limiting groove. With the cooperation of internal and external threads, the lifting seat is simultaneously limited by an anti-rotation part as the adjusting ring rotates, thus achieving lifting and lowering. This adjusts the gap between the moving and stationary grinding heads, achieving coarseness adjustment. The entire adjustment process does not require disassembling the main unit or stopping the grinding operation, enabling continuous grinding. Furthermore, it is more convenient for users to operate. It is suitable not only for coffee beans but also for grinding various medicinal materials, meeting the needs of different medicinal materials requiring different coarseness levels and mixing, thus expanding the grinder's applicability. Furthermore, this invention achieves the lifting and lowering of the moving grinding head by means of a lifting seat, thus preventing the moving grinding head from being directly subjected to the lifting driving force. The moving grinding head only needs to precisely cooperate with the stationary grinding head to achieve functional separation. During the lifting and adjusting process, the moving grinding head moves stably without swaying, and the adjustment accuracy is high. At the same time, during the grinding operation, the moving grinding head is reliably supported in the adjusted position by means of the lifting seat, the structure is stable, avoids shaking, and achieves reliable grinding.

[0009] In a preferred embodiment, the lifting seat includes a mating section and a support section connected above the mating section to support the moving grinding head. The outer diameter of the mating section is larger than the outer diameter of the support section, and the external thread is provided on the mating section.

[0010] In existing technologies, the lifting and lowering of the moving grinding head is adjusted by rotating a nut threaded to the motor shaft. Typically, the motor shaft is long and thin, while the nut has a small outer diameter. Therefore, a relatively long arc length or even multiple rotations of the nut are required to achieve the desired axial distance adjustment, making the operation cumbersome and time-consuming for the user. Therefore, in this preferred embodiment, the lifting seat is configured to include a mating section and a support section connected above the mating section to support the moving grinding head. The outer diameter of the mating section is larger than that of the support section, and an external thread is provided on the mating section. Firstly, since the size of the moving grinding head supported by the support section is larger than the size of the motor shaft, the external thread on the mating section with its enlarged outer diameter allows for adjustment of the required axial distance with a smaller rotation angle or arc length. This is particularly suitable for grinding scenarios with large differences in coarseness between different medicinal materials, thus facilitating user operation and saving time on coarseness adjustment. Furthermore, the axial distance adjustment is achieved by adjusting only a small angle, resulting in a short adjustment cycle, reducing the sway of the moving grinding head during adjustment, and ensuring high adjustment accuracy. On the other hand, the supporting section supporting the moving grinding head has a relatively small outer diameter, which reduces the contact area with the moving grinding head, reduces the rotational friction of the moving grinding head, improves the reliable rotation of the moving grinding head, reduces the wear of the lifting seat, and extends its service life.

[0011] In a preferred embodiment, the lifting seat has a bearing chamber for mounting a bearing, the bearing including an outer ring fixed in the bearing chamber and an inner ring rotatable relative to the outer ring and fitted around the outside of the rotating shaft, the moving grinding head being supported by the inner ring.

[0012] By using a lifting seat to set up the bearing chamber, the structure is compact, the space is used rationally, and the main structure is simplified. Moreover, the moving grinding head is supported by the inner ring, which improves the concentricity of the rotation of the moving grinding head and the rotating shaft. During the grinding process, the dynamic balance of the moving grinding head is guaranteed, the probability of floating and wobbling of the moving grinding head is reduced, and precise grinding is achieved.

[0013] In a preferred embodiment, the lifting seat includes annular support ribs and a support platform connected to the lower part of the support ribs and protruding outwards. The moving grinding head includes an overlapping portion and an extension portion extending outwards and downwards from the overlapping portion. The overlapping portion rests on the support ribs, and the extension portion extends above the support platform and is assisted in being limited by the support platform.

[0014] By setting an annular support rib on the lifting seat and overlapping the moving grinding head for main axial support, the annular support rib provides all-round support for the moving grinding head, preventing tilting and jamming during lifting operations, ensuring smooth lifting operations and reliable transmission. At the same time, the support table surface provides auxiliary support to the extension of the moving grinding head. When the moving grinding head wobbles severely during grinding, the support table surface axially limits the extension, thereby suppressing the wobble tendency of the moving grinding head during operation, achieving a straightening effect, improving the concentricity of the rotation of the moving grinding head and the shaft, improving stability, and achieving reliable grinding.

[0015] In a preferred embodiment, the end face of the lifting seat is provided with a plurality of protrusions or balls, and the moving grinding head is attached to the protrusions or balls.

[0016] Since the moving grinding head needs to be supported by the lifting seat and rotates relative to the lifting seat, supporting the moving grinding head with protrusions or balls can ensure reliable axial positioning between the moving grinding head and the lifting seat, while also reducing the friction between the moving grinding head and the lifting seat. This allows the moving grinding head to rotate smoothly, reduces friction noise and vibration, reduces wear on the lifting seat, and extends its service life.

[0017] In a preferred embodiment, the inner wall of the mounting cavity is provided with a convex annular platform that protrudes towards the center. A through hole is formed at the center of the annular platform. The annular platform is provided with a limiting rib that extends upward around the through hole. The bottom of the moving grinding head is provided with an upwardly recessed groove. The upper end of the lifting seat extends upward through the through hole to support the moving grinding head. The limiting rib is inserted into the groove to limit the movement of the moving grinding head.

[0018] By setting an annular platform on the inner wall of the mounting cavity, with a through hole at the center of the platform, the lifting seat extends upward through the through hole to support the axial limiting part, thus achieving the main axial support for the moving grinding head. The platform surface of the annular platform can also provide auxiliary axial support for the moving grinding head, thereby achieving double axial support and ensuring structural stability and reliability. Furthermore, by inserting limiting ribs into the groove, radial limiting is achieved, which can suppress the tendency of the moving grinding head to wobble during operation, thereby achieving a straightening effect, improving the concentricity of the moving grinding head and the rotating shaft, allowing the moving grinding head to rotate smoothly, and reducing friction noise and vibration. In addition, by setting the annular platform, the moving grinding head can be reliably stopped and limited. If the lifting seat descends excessively, the annular platform will prevent the moving grinding head from falling off the main unit, and also avoid over-adjustment, thus ensuring structural reliability.

[0019] In a preferred embodiment, a reinforcing rib is provided at the top of the moving grinding head, and a downward-facing stop groove is provided inside the main unit, into which the reinforcing rib is inserted.

[0020] By setting a stop groove, the insert rod is inserted into the stop groove to reliably stop and limit the top of the moving grinding head, preventing excessive upward adjustment of the moving grinding head. At the same time, the stop groove prevents the moving grinding head from detaching from the main unit, ensuring structural reliability. The insert rod can move up and down along the stop groove, creating a guiding effect to prevent the moving grinding head from swaying and achieve stable operation.

[0021] In a preferred embodiment, the host includes a lower housing and an upper housing mounted above the lower housing, the limiting groove is formed by the upper housing and the lower housing, and the adjusting ring is axially limited by the upper housing and the lower housing.

[0022] By dividing the main unit into an upper housing and a lower housing, and using the upper housing and the lower housing to form a limiting groove, the processing difficulty of the limiting groove is reduced, which is conducive to improving the precise limiting of the adjusting ring by the limiting groove, while reducing interference with the rotation of the adjusting ring. Furthermore, by using the upper housing and the lower housing for installation, the adjusting ring can be directly axially limited, which simplifies the installation of the adjusting ring and improves assembly efficiency.

[0023] More preferably, the bottom of the side wall of the upper housing or the top of the side wall of the lower housing is provided with an opening, the opening is connected to the limiting groove, and the adjusting part is an adjusting rod extending from the opening;

[0024] By setting an opening that communicates with the limiting groove, the adjusting part of the adjusting ring is exposed. The adjusting part is an adjusting rod extending from the opening, which makes it more convenient for users to perform toggle operations and simplifies user operations. The opening can limit the position of the adjusting rod, thereby limiting the adjustment angle of the adjusting ring, so as to limit the lifting stroke and coarseness span of the lifting seat and the moving grinding head, and avoid over-adjustment.

[0025] More preferably, the upper housing is provided with a mounting cylinder for the lifting seat to extend into, and the adjusting ring is sleeved on the outer periphery of the mounting cylinder;

[0026] By setting up an installation cylinder, the adjusting ring is sleeved on the outer circumference of the installation cylinder to achieve radial limiting, so that the position of the adjusting ring is stable and remains concentric during rotation to prevent jamming. Then, through the cooperation of the internal and external threads, the lifting seat and the moving grinding head are reliably raised and lowered.

[0027] More preferably, the motor is fixedly installed in the lower housing, and the moving grinding head and the lifting seat are installed in the upper housing, with the lifting seat driving the moving grinding head to move up and down relative to the motor.

[0028] By fixing the motor in the lower housing and installing the moving grinding head and lifting seat in the upper housing, the moving grinding head and motor are isolated, preventing grinding powder from affecting the motor. At the same time, the lifting seat drives the moving grinding head to rise and fall relative to the motor. Compared with lifting the entire motor, the moving grinding head is lightweight, the lifting seat has a smaller load, and the lifting operation is more labor-saving, improving the user experience.

[0029] In a preferred embodiment, the adjusting ring includes a ring body with a mounting groove, an adjusting member installed in the mounting groove, and a handle. The handle forms the adjusting part. The outer wall of the ring body has a strip-shaped opening that communicates with the mounting groove. The main unit has an outer opening corresponding to the strip-shaped opening. The handle passes through the outer opening and the strip-shaped opening to connect the adjusting member to the inner wall of the ring body, thereby clamping the outer wall of the ring body.

[0030] More preferably, meshing teeth are provided on the inner wall of the mounting groove, and teeth are provided on the adjusting member. When the handle and the adjusting member are clamped on the outer wall of the ring body, the teeth mesh with the meshing teeth.

[0031] More specifically, the handle is threaded to the inner wall of the ring, or the handle is locked to the inner wall of the ring by fasteners.

[0032] By incorporating an adjusting component, the handle and adjusting component are detachably secured via fasteners or threads on the handle. This allows users or assembly workers to precisely adjust and set the coarseness corresponding to the initial position of the adjusting ring, achieving accurate control over the initial coarseness. For example, during factory assembly, the assembler initially uses the minimum gap between the moving and stationary grinding heads as the initial position of the corresponding ring. At this point, the adjusting component can be roughly installed in any position in the mounting slot. Then, the handle and adjusting component are locked together using fasteners or threads on the handle. This allows the ring position and gap to be adjusted by moving the handle. However, this might result in the handle being positioned in the middle of the outer opening in the initial position (corresponding to the minimum gap), rather than abutting against either end of the outer opening. This would make it difficult for users to determine the adjustment direction if they directly pick up the grinder, and after multiple uses, it would be impossible to determine which position corresponds to the minimum fineness. At this point, the user can loosen the handle again, disengaging the meshing teeth and freeing the ring from clamping. The handle then allows the adjusting element to move relative to the ring, ensuring the ring remains stationary and is in its initial position corresponding to the minimum clearance. The handle is then adjusted to its initial position, abutting against the end of the outer opening. Finally, the handle and the inner wall of the ring are tightened again, ensuring the handle is at the end of the outer opening while the ring is in its initial position corresponding to the minimum clearance. Therefore, during subsequent use, the user can clearly confirm the minimum fineness using the handle position, preventing over-adjustment that could cause the moving and stationary grinding heads to jam.

[0033] In a preferred embodiment, the main unit includes a separate housing body and a discharge chamber. The discharge chamber includes a grinding cylinder surrounding the outer periphery of the moving grinding head and a discharge nozzle protruding from the side of the grinding cylinder. The grinding cylinder is detachably installed inside the housing body. A snap-fit ​​is provided on the side wall of the housing body, and the discharge nozzle is snapped into the snap-fit.

[0034] By separating the housing body from the discharge chamber, the discharge chamber can be easily disassembled and cleaned after grinding. The discharge chamber includes a grinding cylinder and a discharge nozzle. The discharge nozzle guides the powder out, ensuring orderly powder discharge and preventing powder splashing and accumulation. A snap-fit ​​opening on the side wall of the housing body creates a clearance for the discharge nozzle, facilitating user installation of the discharge chamber. Simultaneously, the snap-fit ​​between the discharge nozzle and the snap-fit ​​ensures reliable positioning after installation.

[0035] In a preferred embodiment, the main unit includes a discharge bin and an inlet bin located above the discharge bin. The discharge bin includes a grinding cylinder surrounding the outer periphery of the moving grinding head. A protective cylinder is integrally connected to the bottom of the inlet bin. The stationary grinding head is installed inside the protective cylinder from the bottom end of the protective cylinder. The bottom end of the protective cylinder is inserted and fixed to the grinding cylinder.

[0036] The feeding hopper allows users to easily add materials in batches, making operation more convenient. At the same time, a protective cylinder is integrated at the bottom of the feeding hopper to form an installation space for the stationary grinding head, protecting it. The stationary grinding head can be made of a material with higher hardness for effective grinding, while the protective shell can be made of a low-cost material, thereby reducing processing costs while ensuring grinding efficiency. The protective cylinder is inserted and fixed to the grinding cylinder, achieving reliable cooperation between the stationary and moving grinding heads and easy installation.

[0037] In a preferred embodiment, the main unit includes a grinding cylinder surrounding the outer periphery of the moving grinding head, and the stationary grinding head includes a stationary grinding cylinder and stationary grinding teeth integrally disposed on the inner wall of the stationary grinding cylinder, with the lower end of the stationary grinding cylinder inserted and fixed to the grinding cylinder.

[0038] Alternatively, the host machine may include a grinding cylinder surrounding the periphery of the moving grinding head, with the stationary grinding head integrally formed with the grinding cylinder.

[0039] By separating and fixing the grinding cylinder with the moving grinding head and the stationary grinding cylinder, the two can be cleaned separately, while ensuring a stable connection between them during grinding operations.

[0040] By integrally molding the static grinding head into the grinding cylinder, the number of parts in the grinding machine can be reduced, resulting in a simple structure and ease of use.

[0041] In a preferred embodiment, the main unit is provided with an installation cylinder, the lifting seat and the adjusting ring are respectively located inside and outside the installation cylinder, the outer wall of the lifting seat is arranged with a plurality of protrusions at intervals along the circumference, the outer surface of the protrusions is provided with the external thread, the side wall of the installation cylinder is provided with a clearance notch for the external thread to connect with the internal thread, the anti-rotation part is the clearance notch, and the protrusion is fitted in the clearance notch.

[0042] By incorporating a mounting cylinder within the main unit, and positioning the adjusting ring on the outer circumference of the mounting cylinder for radial limiting, the adjusting ring's position is stabilized, maintaining concentricity during rotation and preventing jamming. This, in turn, allows for reliable lifting and lowering of the lifting seat and moving grinding head through the engagement of internal and external threads. The lifting seat utilizes a protrusion with an external thread, while the mounting cylinder has an clearance notch. The protrusion engages within this notch, creating a stop-rotation limit between the lifting seat and the main unit, while also ensuring proper engagement and clearance between the internal and external threads. This simple structure eliminates the need for additional stop mechanisms, resulting in a compact design. Attached Figure Description

[0043] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0044] Figure 1 This is a three-dimensional structural diagram of the grinding machine in one embodiment of the present invention;

[0045] Figure 2 This is a cross-sectional view of the grinding machine in one embodiment of the present invention;

[0046] Figure 3 for Figure 2 Enlarged diagram of section A in the middle;

[0047] Figure 4 This is a schematic diagram of the lifting seat in one embodiment of the present invention;

[0048] Figure 5 This is an exploded view of the moving grinding head, lifting seat, and adjusting ring in one embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram illustrating the cooperation between the lifting seat and the adjusting ring in one embodiment of the present invention;

[0050] Figure 7 This is a schematic diagram of the assembly of the host in one embodiment of the present invention;

[0051] Figure 8 This is an exploded view of the host computer in one embodiment of the present invention;

[0052] Figure 9 This is a schematic diagram showing the fit between the upper shell and the discharge bin in one embodiment of the present invention;

[0053] Figure 10 This is a schematic diagram showing the fit between the upper shell and the feed hopper in one embodiment of the present invention;

[0054] Figure 11 This is a cross-sectional view of the host in one embodiment of the present invention;

[0055] Figure 12 This is an exploded view of the regulating ring in one embodiment of the present invention;

[0056] Figure 13 This is a cross-sectional assembly diagram of the adjusting ring in one embodiment of the present invention.

[0057] List of components and reference numerals: 10. Main unit; 100. External opening; 101. Anti-rotation part; 102. Limiting groove; 103. Ring platform; 104. Limiting rib; 11. Upper housing; 111. Mounting cylinder; 112. Mating rib; 113. Bayonet; 12. Lower housing; 13. Discharge bin; 131. Grinding cylinder; 132. Discharge nozzle; 14. Feed bin; 15. Protective cylinder; 20. Motor; 30. Moving grinding head; 40. Stationary grinding head 50. Lifting seat; 501. External thread; 502. Protrusion; 51. Support section; 511. Support rib; 512. Support platform; 513. Bearing; 5131. Outer ring; 5132. Inner ring; 52. Mating section; 60. Adjusting ring; 601. Internal thread; 602. Adjusting rod; 61. Ring body; 611. Mounting groove; 612. Strip opening; 62. Adjusting component; 63. Handle; 64. Fastener; 65. End cap. Detailed Implementation

[0058] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0059] Many specific details are set forth in the following description to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0060] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0061] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0062] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] like Figure 1 , 2 As shown in Figure 3, this utility model provides a grinding machine, including a main unit 10 with a mounting cavity, a motor 20 located in the mounting cavity, a moving grinding head 30 and a stationary grinding head 40 that cooperate with each other, as shown in Figure 3. Figure 4 , 5 As shown in Figures 6 and 7, the grinding machine also includes:

[0064] The lifting seat 50 is installed in the mounting cavity. The moving grinding head 30 is positioned above the lifting seat 50 and is driven by the lifting seat 50 to move up and down along the axis of the motor 20 to change the gap between the moving grinding head and the stationary grinding head. The motor 20 is located below the lifting seat 50. The rotating shaft of the motor 20 passes through the lifting seat 50 and is connected to the moving grinding head 30 for transmission. The outer periphery of the lifting seat 50 is provided with an external thread 501.

[0065] An adjusting ring 60 is sleeved on the outer periphery of the lifting seat 50. The inner side of the adjusting ring 60 is provided with an internal thread 601 that matches the external thread 501. The outer side of the adjusting ring 60 is provided with an adjusting part exposed to the main unit 10.

[0066] An anti-rotation part 101 is provided in the mounting cavity to limit the rotation of the lifting seat 50;

[0067] The limiting groove 102 is provided on the inner peripheral wall of the mounting cavity, and the adjusting ring 60 is rotatably installed in the limiting groove 102 and is axially limited by the limiting groove 102.

[0068] The grinder provided in this embodiment features an adjusting ring 60 and a lifting seat 50. The adjusting ring 60 is exposed on the main unit 10, allowing the user to operate it without disassembling the main unit 10. This enables dynamic coarseness adjustment. Specifically, the user rotates the adjusting ring 60 through the adjusting seat, which axially limits the adjusting ring 60 within the limiting groove 102. With the cooperation of the internal thread 601 and the external thread 501, the lifting seat 50 is simultaneously limited by the anti-rotation part 101 as the adjusting ring 60 rotates, thereby adjusting the gap between the moving grinding head 30 and the stationary grinding head 40 and achieving coarseness adjustment. The entire adjustment process does not require disassembling the main unit 10 or stopping the grinding operation, enabling continuous grinding. The operation is more convenient for the user and is suitable not only for coffee beans but also for grinding different medicinal materials, meeting the needs of different medicinal materials requiring different coarseness and mixing, thus expanding the applicability of the grinder. Furthermore, this invention achieves the lifting and lowering of the moving grinding head 30 by means of the lifting seat 50, thus preventing the moving grinding head 30 from being directly subjected to the lifting driving force. The moving grinding head 30 only needs to be precisely matched with the stationary grinding head 40 to achieve functional separation. During the lifting and lowering adjustment process, the moving grinding head 30 moves stably without swaying and has high adjustment accuracy. At the same time, during the grinding operation, the moving grinding head 30 is reliably supported in the adjusted position by means of the lifting seat 50, with a stable structure to avoid shaking and achieve reliable grinding.

[0069] It should be noted that this invention does not limit the specific mating structure of the moving grinding head and the stationary grinding head. For example, the moving grinding head can be tapered, wider at the bottom than the top, with the stationary grinding head fitted around its outer circumference; or, the stationary grinding head can be positioned above the moving grinding head, with stationary grinding teeth on its lower end face and grinding teeth on its upper end face. Regardless of the chosen mating method, the gap between the moving and stationary grinding heads can be changed during the lifting and lowering of the moving grinding head, thereby achieving the adjustment of the grinding machine's coarseness / fineness.

[0070] This utility model does not limit the structure of the lifting seat 50. In a preferred embodiment, such as... Figure 4As shown, the lifting seat 50 includes a mating section 52 and a support section 51 connected above the mating section 52 to support the moving grinding head 30. The outer diameter of the mating section 52 is larger than the outer diameter of the support section 51, and the external thread 501 is provided on the mating section 52.

[0071] In the existing technology, the lifting and lowering of the moving grinding head 30 is adjusted by rotating the nut that is threaded to the shaft of the motor 20. Usually, the shaft of the motor 20 is slender and the outer diameter of the nut is small. Therefore, a long arc length or even multiple turns of the nut are required to achieve the required axial distance adjustment. This is cumbersome and time-consuming for users.

[0072] Therefore, by configuring the lifting seat 50 to include a mating section 52 and a support section 51 connected above the mating section 52 to support the moving grinding head 30, with the outer diameter of the mating section 52 being larger than the outer diameter of the support section 51 and the external thread 501 provided on the mating section 52, on the one hand, since the size of the support section 51 supporting the moving grinding head 30 is larger than the size of the rotating shaft of the motor 20, and on this basis, by providing the external thread 501 through the mating section 52 with an enlarged outer diameter, the required axial distance can be adjusted by rotating a small angle or arc length. This is especially suitable for grinding scenarios with large differences in coarseness between different medicinal materials, thus facilitating user operation and saving time for coarseness adjustment; moreover, axial distance adjustment can be achieved by adjusting only a small angle, with a short adjustment cycle, reducing the sway of the moving grinding head 30 during adjustment and ensuring high adjustment accuracy. On the other hand, the relatively small outer diameter of the support section 51 supporting the moving grinding head 30 reduces the contact area with the moving grinding head 30, resulting in less rotational friction of the moving grinding head 30, improving the reliable rotation of the moving grinding head 30, reducing wear on the lifting seat 50, and extending its service life.

[0073] Of course, in another preferred embodiment of this utility model, the lifting seat 50 is a cylindrical shape with a uniform outer diameter, and the top ring of the lifting seat 50 supports the moving grinding head 30.

[0074] It should also be noted that the support method for the moving grinding head 30 is not limited in this utility model. To ensure the smooth lifting and rotation of the moving grinding head 30, any one of the following embodiments 1-4 is preferred:

[0075] Implementation Example 1, such as Figure 2 , 3 As shown, the lifting seat 50 has a bearing chamber for mounting a bearing 513. The bearing 513 includes an outer ring 5131 fixed in the bearing chamber and an inner ring 5132 that rotates relative to the outer ring 5131 and is sleeved on the outside of the rotating shaft. The moving grinding head 30 is supported by the inner ring 5132.

[0076] More preferably, the inner ring 5132 of the bearing 513 is tightly fitted to the rotating shaft so as to rotate with the rotating shaft; alternatively, there may be a gap between the inner ring 5132 and the rotating shaft, so that the rotating shaft drives the moving grinding head 30 and the moving grinding head 30 drive the inner ring 5132 to rotate synchronously.

[0077] By using the lifting seat 50 to set up the bearing chamber, the structure is compact and the space is used reasonably, simplifying the structure of the main unit 10. Moreover, the moving grinding head 30 is supported by the inner ring 5132, thereby improving the rotational concentricity between the moving grinding head 30 and the rotating shaft. During the grinding process, the dynamic balance of the moving grinding head 30 is guaranteed, reducing the probability of the moving grinding head 30 floating and wobbling, and achieving precise grinding.

[0078] Implementation Example 2, such as Figure 5 As shown, the lifting seat 50 includes annular support ribs 511 and a support platform 512 connected to the lower part of the support ribs 511 and protruding outward. When the lifting seat adopts a non-uniform diameter structure, the support ribs 511 and the support platform 512 are located on the support section 51. The moving grinding head 30 includes an overlapping part and an extension part extending outward and downward from the overlapping part. The overlapping part is supported on the support ribs 511, and the extension part extends to the top of the support platform 512 and is assisted in being limited by the support platform 512.

[0079] By setting an annular support rib 511 on the lifting seat 50 and overlapping it with the moving grinding head 30 for main axial support, the annular support rib 511 provides all-round support for the moving grinding head 30, preventing tilting and jamming during lifting operations, ensuring smooth lifting operations and reliable transmission. At the same time, the support table 512 provides auxiliary support for the extension of the moving grinding head 30. When the moving grinding head 30 wobbles severely during grinding, the support table 512 axially limits the extension, thereby suppressing the wobble tendency of the moving grinding head 30 during operation, achieving a straightening effect, improving the concentricity of the rotation of the moving grinding head 30 and the rotating shaft, improving stability, and achieving reliable grinding.

[0080] As a preferred option, such as Figure 5 As shown, the lifting seat 50 is configured to include a mating section 52 and a support section 51 connected above the mating section 52 to support the moving grinding head 30. The outer diameter of the mating section 52 is larger than the outer diameter of the support section 51. An external thread 501 is provided on the mating section 52. A stepped surface is connected between the mating section 52 and the support section 51, and the stepped surface forms the support platform 512.

[0081] Of course, in this embodiment, the lifting seat 50 can also be a straight cylinder with a constant diameter, and a ring edge is provided on the outer periphery of the lifting seat 50 to form a support platform.

[0082] In Example 3, the end face of the lifting seat 50 is provided with multiple protrusions or balls, and the moving grinding head 30 is attached to the protrusions or balls.

[0083] Since the moving grinding head 30 needs to be supported by the lifting seat 50 and rotates relative to the lifting seat 50, supporting the moving grinding head 30 with protrusions or balls can ensure reliable axial positioning between the moving grinding head 30 and the lifting seat 50, while also reducing the friction between the moving grinding head 30 and the lifting seat 50. This allows the moving grinding head 30 to rotate smoothly, reduces friction noise and vibration, reduces wear on the lifting seat 50, and extends its service life.

[0084] Of course, as an alternative embodiment of this example, protrusions or balls can be provided on the overlapping part of the moving grinding head 30 so that the moving grinding head 30 overlaps on the lifting seat 50 through the protrusions or balls.

[0085] Implementation Example 4, such as Figure 2 , 3 As shown, the inner wall of the mounting cavity is provided with an annular platform 103, and the center of the annular platform 103 is surrounded by a through hole. The annular platform 103 is provided with a limiting rib 104 that surrounds the through hole and extends upward. The bottom of the moving grinding head is provided with an upwardly recessed groove. The upper end of the lifting seat extends upward through the through hole to support the moving grinding head. The limiting rib is inserted into the groove to limit the movement of the moving grinding head.

[0086] Specifically, the lifting seat 50 supports the moving grinding head by the inner ring of the bearing, or the top surface of the lifting seat supports the moving grinding head, or the top of the lifting seat is provided with a ring rib to support the moving grinding head.

[0087] By setting an annular platform 103 on the inner wall of the mounting cavity, with a through hole at its center, the lifting seat 50 extends upward through the through hole to support the axial limiting part, thus achieving the main axial support for the moving grinding head 30. The platform surface of the annular platform 103 can also provide auxiliary axial support for the moving grinding head 30, thereby achieving double axial support and ensuring structural stability and reliability. Furthermore, radial limiting is achieved by using the limiting rib 104 surrounding the through hole to limit the groove, which can suppress the tendency of the moving grinding head 30 to wobble during operation, thereby achieving a straightening effect, improving the concentricity of the moving grinding head 30 and the rotating shaft, allowing the moving grinding head 30 to rotate smoothly, and reducing friction noise and vibration. In addition, by setting the annular platform 103, the moving grinding head 30 can be reliably stopped and limited. If the lifting seat 50 descends excessively, the annular platform 103 will prevent the moving grinding head 30 from falling off the main unit 10, and also avoids over-adjustment, thus ensuring structural reliability.

[0088] In this embodiment, a reinforcing rib is provided at the top of the moving grinding head, and a stop groove with an opening facing downwards is provided inside the main unit, into which the reinforcing rib is inserted.

[0089] By setting a stop groove, the insert rod is inserted into the stop groove to reliably stop and limit the top of the moving grinding head, preventing excessive upward adjustment of the moving grinding head. At the same time, the stop groove prevents the moving grinding head from detaching from the main unit, ensuring structural reliability. The insert rod can move up and down along the stop groove, creating a guiding effect to prevent the moving grinding head from swaying and achieve stable operation.

[0090] Of course, the above-mentioned implementation examples 1-4 are all for improving the smooth lifting and operation of the moving grinding head 30. Different implementation examples can be combined with each other or with other implementation methods.

[0091] This utility model does not limit the structure of the host 10:

[0092] Implementation Example 5, such as Figure 7 As shown, the main unit 10 includes a lower housing 12 and an upper housing 11 mounted above the lower housing 12. The limiting groove 102 is formed by the upper housing 11 and the lower housing 12. The adjusting ring 60 is axially limited by the upper housing 11 and the lower housing 12.

[0093] More preferably, combined with Figure 1 As shown, the bottom of the side wall of the upper housing 11 or the top of the side wall of the lower housing 12 is provided with an opening, which is connected to the limiting groove 102, and the adjustment part is an adjustment rod 602 extending from the opening.

[0094] By dividing the main unit 10 into an upper housing 11 and a lower housing 12, and using the upper housing 11 and the lower housing 12 to form a limiting groove 102, the machining difficulty of the limiting groove 102 is reduced, which is conducive to improving the precise limiting of the adjusting ring 60 by the limiting groove 102, while reducing interference with the rotation of the adjusting ring 60. Furthermore, after the upper housing 11 and the lower housing 12 are installed, the adjusting ring 60 can be directly axially limited, which simplifies the installation of the adjusting ring 60 and improves the assembly efficiency.

[0095] By setting an opening that connects to the limiting groove 102, the adjusting part of the adjusting ring 60 is exposed. The adjusting part is an adjusting rod 602 extending from the opening, which makes it more convenient for users to perform toggle operations and simplifies user operations. The opening can limit the position of the adjusting rod 602, thereby limiting the adjustment angle of the adjusting ring 60, so as to limit the lifting stroke and coarseness span of the lifting seat 50 and the moving grinding head 30, and avoid over-adjustment.

[0096] In this embodiment, the motor 20 is fixedly installed in the lower housing 12, and the moving grinding head 30 and the lifting seat 50 are installed in the upper housing 11. The lifting seat 50 drives the moving grinding head 30 to move up and down relative to the motor 20.

[0097] By fixing the motor 20 in the lower housing 12 and installing the moving grinding head 30 and the lifting seat 50 in the upper housing 11, the moving grinding head 30 and the motor 20 are isolated, preventing the grinding powder from affecting the motor 20. At the same time, the lifting seat 50 drives the moving grinding head 30 to rise and fall relative to the motor 20. Compared with driving the motor 20 to rise and fall as a whole, the moving grinding head 30 is lightweight and the lifting seat 50 has a smaller load, making the lifting operation more effortless and improving the user experience.

[0098] Of course, the installation method of the motor 20 is not limited to the use of a split host 10, and is still applicable to the scheme where the host 10 adopts an integrated shell body.

[0099] Moreover, the installation method of the motor 20 of this utility model is not limited to the one mentioned above. In another preferred embodiment, the motor 20 is fixedly installed on the lifting seat 50 so as to move with the lifting seat 50, thereby realizing that the lifting seat 50 can simultaneously drive the motor 20 and the moving grinding head 30 to rise and fall, without the need to move the moving grinding head 30 separately, thereby improving the reliable transmission between the rotating shaft of the moving grinding head 30 and the motor 20.

[0100] In this implementation example, such as Figure 7 As shown, preferably, the upper housing 11 is provided with a mounting cylinder 111 into which the lifting seat 50 extends, and the adjusting ring 60 is sleeved on the outer periphery of the mounting cylinder 111;

[0101] Multiple mating ribs 112 are provided on the outer periphery of the mounting cylinder 111. The multiple mating ribs 112 form the upper end of the limiting groove 102. The adjusting ring 60 is sleeved on the outer periphery of the mounting cylinder 111 and is axially limited by the mating ribs 112.

[0102] More specifically, such as Figure 7 As shown, the main unit 10 is equipped with an installation cylinder 111. The lifting seat 50 and the adjusting ring 60 are located inside and outside the installation cylinder 111, respectively. Multiple protrusions 502 are arranged circumferentially on the outer wall of the lifting seat 50. External threads 501 are provided on the outer surface of the protrusions 502. The side wall of the installation cylinder 111 is provided with a clearance notch for the external thread 501 to connect with the internal thread 601. The anti-rotation part 101 is a clearance notch, and the protrusions 502 are fitted into the clearance notch.

[0103] By setting the mounting cylinder 111, the adjusting ring 60 is sleeved on the outer circumference of the mounting cylinder 111 to achieve radial limiting, so that the position of the adjusting ring 60 is stable and remains concentric during rotation to prevent jamming. Then, through the cooperation of the internal thread 601 and the external thread 501, the lifting seat 50 and the moving grinding head 30 are reliably lifted and lowered.

[0104] The external thread 501 is set by the protrusion of the lifting seat 50. At the same time, the mounting cylinder 111 has a clearance notch. The protrusion is locked in the clearance notch to form a rotation stop limit between the lifting seat 50 and the main unit 10. It also forms a cooperative clearance between the internal thread 601 and the external thread 501. The structure is simple and does not require an additional stop structure, thus achieving a compact structure.

[0105] It should be noted that the anti-rotation part 101 mentioned in this embodiment can also be applied to other embodiments. At the same time, the anti-rotation part 101 of this utility model can also be an anti-rotation groove or two anti-rotation ribs. For example, a protrusion is provided on the outer periphery of the lifting seat 50, and the protrusion extends into the anti-rotation groove, or two anti-rotation ribs are placed on both sides of the protrusion to limit the rotation of the lifting seat 50.

[0106] Understandably, the convex hull can be arranged independently from the external thread, meaning that the external thread can also be a continuous series of turns arranged along the lifting seat.

[0107] The structure of the host 10 can also be selected as follows:

[0108] Implementation Example 6, such as Figure 8 , 9 As shown, the host 10 includes a shell body and a discharge bin 13 that are separately configured. More specifically, this embodiment can be implemented in combination with embodiment 5 or independently. When combined with embodiment 5, the shell body in this embodiment is the upper shell 11.

[0109] like Figure 9 As shown, the discharge chamber 13 includes a grinding cylinder 131 surrounding the outer periphery of the moving grinding head 30 and a discharge nozzle 132 protruding from the side of the grinding cylinder 131. The grinding cylinder 131 is detachably installed inside the housing body. A snap-fit ​​113 is provided on the side wall of the housing body, and the discharge nozzle 132 is snapped into the snap-fit ​​113. The discharge nozzle 132 is integrally protruding from the side of the grinding cylinder 131, but it can also be separately installed on the side of the grinding cylinder 131.

[0110] Of course, in this embodiment, the main unit 10 can also be an integral shell body, and the lifting seat 50 divides the shell body into a lower cavity for mounting the motor 20 and an upper cavity for mounting the moving grinding head 30.

[0111] By separating the shell body from the discharge chamber 13, it is convenient to disassemble and clean the discharge chamber 13 separately after grinding. The discharge chamber 13 includes a grinding cylinder 131 and a discharge nozzle 132. The discharge is guided by the discharge nozzle 132, ensuring orderly powder discharge and preventing powder splashing and accumulation. A snap-fit ​​113 is provided on the side wall of the shell body to avoid obstructing the discharge nozzle 132, facilitating the user's installation of the discharge chamber 13. At the same time, the snap-fit ​​between the discharge nozzle 132 and the snap-fit ​​113 ensures reliable positioning after installation.

[0112] Furthermore, this utility model does not limit the installation and structure of the static grinding head 40, for example:

[0113] Implementation Example 7, taking the aforementioned split-type host 10, i.e., the host of Implementation Example 5, as an example, such as... Figure 8 , 9 As shown in Figure 10, the main unit 10 also includes a discharge bin 13 and an inlet bin 14 located above the discharge bin 13. The discharge bin 13 includes a grinding cylinder 131 surrounding the outer periphery of the moving grinding head 30. A protective cylinder 15 is integrally connected to the bottom of the inlet bin 14. The stationary grinding head 40 is installed inside the protective cylinder 15 from the bottom end of the protective cylinder 15. The bottom end of the protective cylinder 15 is inserted and fixed to the grinding cylinder 131.

[0114] The feeding hopper 14 allows users to easily add materials in batches, making operation more convenient. At the same time, a protective cylinder 15 is integrally connected to the bottom of the feeding hopper 14, forming an installation space for the stationary grinding head 40 and protecting it. The stationary grinding head 40 can be made of a material with higher hardness for effective grinding, while the protective shell can be made of a low-cost material, thereby reducing processing costs while ensuring grinding efficiency. The protective cylinder 15 is inserted and fixed to the grinding cylinder 131, achieving reliable cooperation between the stationary grinding head 40 and the moving grinding head 30 and easy installation.

[0115] The assembly process of the grinding machine provided in this embodiment is described below:

[0116] First, the stationary grinding head is installed in the protective cylinder of the feed hopper to form the first module; the moving grinding head and the discharge hopper are clamped to the upper shell from top to bottom, and the support base and the adjusting ring are clamped to the upper shell from bottom to top to form the second module; the motor is assembled with the lower shell to form the third module.

[0117] Then, the protective cylinder is inserted and fixed to the grinding cylinder of the discharge hopper. The feed hopper, upper shell, and lower shell are assembled by fasteners or buckles to complete the assembly of the three modules.

[0118] In Example 8, the host machine 10 includes a grinding cylinder 131 surrounding the outer periphery of the moving grinding head 30, and the stationary grinding head 40 includes a stationary grinding cylinder and stationary grinding teeth integrally disposed on the inner wall of the stationary grinding cylinder. The lower end of the stationary grinding cylinder is inserted and fixed to the grinding cylinder 131.

[0119] In Example 9, the host machine 10 includes a grinding cylinder 131 surrounding the outer periphery of the moving grinding head 30, and the stationary grinding head 40 is integrally formed with the grinding cylinder 131.

[0120] By separately setting up and inserting the grinding cylinder 131 with the moving grinding head 30 and the stationary grinding cylinder, the two can be cleaned separately, while ensuring a stable connection between the two during the grinding operation.

[0121] By integrally molding the static grinding head 40 into the grinding cylinder 131, the number of parts in the grinding machine can be reduced, resulting in a simple structure and ease of use.

[0122] In fact, the discharge bin 13 in the above embodiments 7, 8, and 9 can be detachably connected to the upper housing 11 or integrally formed with the upper housing 11. The discharge bin 13 may only include the grinding cylinder 131, with a discharge port opened in the grinding cylinder 131. Of course, the grinding cylinder 131 in the previous embodiments can also be used, with a discharge nozzle 132 integrally provided on the side.

[0123] It should be noted that the adjusting part in this utility model is not limited to the adjusting rod mentioned above. The adjusting part can also be the outer side of the adjusting ring, with anti-slip protrusions provided on the outer side.

[0124] Additionally, in a preferred embodiment, such as Figure 11-13 As shown, the adjusting ring 60 includes a ring body 61 with a mounting groove 611, an adjusting member 62 installed in the mounting groove 611, and a handle 63. The handle 63 forms an adjusting part. The outer wall of the ring body 61 is provided with a strip-shaped opening 612, which communicates with the mounting groove 611. The main unit is provided with an outer opening 100 corresponding to the strip-shaped opening 612. The handle 63 passes through the outer opening 100 and the strip-shaped opening 612 to connect the adjusting member 62 to the inner wall of the ring body 61, so as to clamp the outer wall of the ring body 61.

[0125] like Figure 11 As shown, preferably, the ring body 61 includes an inner ring and an outer ring surrounding the outer periphery of the inner ring, a connecting rib is provided between the inner ring and the outer ring, and a mounting groove is formed between the inner ring and the outer ring. The inner ring and the outer ring respectively form the inner wall and the outer wall of the adjusting ring.

[0126] More preferably, meshing teeth are provided on the inner wall of the mounting groove 611, and teeth are provided on the adjusting member 62. When the handle 63 and the adjusting member 62 clamp the outer wall of the ring body 61, the teeth mesh with the meshing teeth.

[0127] More specifically, the handle 63 is threaded to the inner wall of the ring 61, or the handle 63 is locked to the inner wall of the ring 61 by fastener 64, and an end cap 65 is provided at the end of the handle 63.

[0128] By setting the adjusting component 62, the handle 63 and the adjusting component 62 are detachably fixed by the fastener 64 or the thread on the handle 63, which facilitates the user or assembly worker to accurately adjust and set the coarseness corresponding to the initial position of the adjusting ring, and achieves precise control of the initial coarseness. For example, during factory assembly, the assembler first sets the minimum gap between the moving grinding head and the stationary grinding head as the initial position of the corresponding ring body 61. At this time, the adjusting component 62 can be roughly installed in any position of the mounting slot 611. Then, the handle 63 and the adjusting component 62 are locked and fixed by the fastener 64 or the thread on the handle 63, so that the position and gap of the ring body 61 can be adjusted by moving the handle 63. At this time, it may cause the handle 63 to be in the middle of the outer opening in the initial position (that is, the position corresponding to the minimum gap), instead of abutting against both ends of the outer opening. This will cause the user to be unable to determine the adjustment direction if they directly take the grinding machine, and after multiple uses, it will be impossible to determine which position corresponds to the minimum fineness. At this point, the user can loosen the handle 63 again, causing the meshing teeth to disengage and the ring 61 to be released from clamping. The handle 63 then carries the adjusting member 62 relative to the ring 61, allowing the handle 63 to be adjusted to its initial position abutting the end of the outer opening while ensuring the ring 61 remains stationary and is in the initial position corresponding to the minimum clearance. Then, the handle 63 and the inner wall of the ring 61 are tightened again, ensuring the handle 63 is at the end of the outer opening 100 and the ring 61 is in the initial position corresponding to the minimum clearance. Therefore, during subsequent use, the user can clearly confirm the minimum fineness using the position of the handle 63, and will not experience the problem of the moving and stationary grinding heads jamming due to over-adjustment.

[0129] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0130] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0131] The above are merely embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A grinding machine, comprising a main unit having a mounting cavity, a motor located within the mounting cavity, a movable grinding head and a stationary grinding head that cooperate with each other, characterized in that, The grinding mill also includes: A lifting seat is installed in the mounting cavity. The moving grinding head is positioned above the lifting seat and is driven by the lifting seat to move up and down along the axis of the motor. The motor is located below the lifting seat. The rotating shaft of the motor passes through the lifting seat and is connected to the moving grinding head for transmission. The outer periphery of the lifting seat is provided with external threads. An adjusting ring is sleeved on the outer periphery of the lifting seat. The inner side of the adjusting ring is provided with an internal thread that matches the external thread, and the outer side of the adjusting ring is provided with an adjusting part exposed to the main unit. An anti-rotation part is provided in the mounting cavity to limit the rotation of the lifting seat; A limiting groove is provided on the inner peripheral wall of the mounting cavity, and the adjusting ring is rotatably installed in the limiting groove and axially limited by the limiting groove.

2. A grinding machine according to claim 1, characterized in that, The lifting seat includes a mating section and a support section connected above the mating section to support the moving grinding head. The outer diameter of the mating section is larger than the outer diameter of the support section, and the external thread is provided on the mating section.

3. A grinding machine according to claim 1 or 2, characterized in that, The lifting seat has a bearing chamber for mounting bearings. The bearing includes an outer ring fixed in the bearing chamber and an inner ring that rotates relative to the outer ring and is fitted around the outside of the rotating shaft. The moving grinding head is supported by the inner ring. Alternatively, the lifting seat includes annular support ribs and a support platform connected to the lower part of the support ribs and protruding outwards. The moving grinding head includes an overlapping part and an extension part extending outwards and downwards from the overlapping part. The overlapping part rests on the support ribs, and the extension part extends above the support platform and is assisted in being limited by the support platform.

4. A grinder as claimed in claim 1 or 2, wherein The end face of the lifting seat is provided with multiple protrusions or balls, and the moving grinding head is attached to the protrusions or balls.

5. A grinder as claimed in claim 1 or 2, wherein, The inner wall of the mounting cavity is provided with a ring platform that protrudes towards the center. A through hole is formed around the center of the ring platform. The ring platform is provided with a limiting rib that surrounds the through hole and extends upward. The bottom of the moving grinding head is provided with an upwardly recessed groove. The upper end of the lifting seat protrudes upward through the through hole to support the moving grinding head. The limiting rib is inserted into the groove to limit the movement of the moving grinding head. Alternatively, the top of the moving grinding head is provided with a reinforcing rib, and the main unit is provided with a downward-facing stop groove, into which the reinforcing rib is inserted.

6. The grinder of claim 1, wherein, The main unit includes a lower housing and an upper housing mounted above the lower housing. The limiting groove is formed by the upper housing and the lower housing, and the adjusting ring is axially limited by the upper housing and the lower housing.

7. A grinder as claimed in claim 6 wherein, An opening is provided at the bottom of the side wall of the upper housing or at the top of the side wall of the lower housing, the opening is connected to the limiting groove, and the adjusting part is an adjusting rod extending from the opening; Alternatively, the upper housing may have an internal mounting cylinder into which the lifting seat extends, and the adjusting ring may be sleeved around the outer periphery of the mounting cylinder; Alternatively, the motor is fixedly installed in the lower housing, and the moving grinding head and the lifting seat are installed in the upper housing, with the lifting seat driving the moving grinding head to rise and fall relative to the motor.

8. The grinder of claim 1, wherein, The adjusting ring includes a ring body with a mounting groove, an adjusting member installed in the mounting groove, and a handle. The handle forms the adjusting part. The outer wall of the ring body has a strip-shaped opening that communicates with the mounting groove. The main unit has an outer opening corresponding to the strip-shaped opening. The handle passes through the outer opening and the strip-shaped opening to connect the adjusting member to the inner wall of the ring body, thereby clamping the outer wall of the ring body.

9. The grinder of claim 1, wherein, The main unit includes a shell body and a discharge chamber that are set separately. The discharge chamber includes a grinding cylinder surrounding the outer periphery of the moving grinding head and a discharge nozzle protruding from the side of the grinding cylinder. The grinding cylinder is detachably installed inside the shell body. The side wall of the shell body is provided with a bayonet, and the discharge nozzle is engaged in the bayonet. Alternatively, the main unit includes a discharge bin and an inlet bin located above the discharge bin. The discharge bin includes a grinding cylinder surrounding the outer periphery of the moving grinding head. A protective cylinder is integrally connected to the bottom of the inlet bin. The stationary grinding head is installed inside the protective cylinder from the bottom end of the protective cylinder. The bottom end of the protective cylinder is inserted and fixed to the grinding cylinder. Alternatively, the main unit includes a grinding cylinder surrounding the outer periphery of the moving grinding head, and the stationary grinding head includes a stationary grinding cylinder and stationary grinding teeth integrally disposed on the inner wall of the stationary grinding cylinder, with the lower end of the stationary grinding cylinder inserted and fixed to the grinding cylinder. Alternatively, the host machine may include a grinding cylinder surrounding the periphery of the moving grinding head, with the stationary grinding head integrally formed with the grinding cylinder.

10. A grinding machine according to claim 1, characterized in that, The host is equipped with an installation cylinder. The lifting seat and the adjusting ring are located inside and outside the installation cylinder, respectively. Multiple protrusions are arranged at intervals along the circumference of the outer wall of the lifting seat. The outer surface of the protrusions is provided with external threads. The side wall of the installation cylinder is provided with a clearance notch for the external threads to connect with the internal threads. The anti-rotation part is the clearance notch, and the protrusions are fitted into the clearance notch.

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