Grinding machine

Abstract

The utility model belongs to the technical field of grinding devices, and discloses a grinding machine which comprises a main machine with a mounting cavity, a static grinding head arranged in the mounting cavity and a movable grinding head matched with the static grinding head, and further comprises a power assembly which is mounted in the mounting cavity in a lifting mode, and the movable grinding head is driven by the power assembly and ascends and descends along with the power assembly. External threads are arranged on the periphery of the power assembly; and the adjusting ring is connected to the periphery of the power assembly in a sleeving mode, internal threads matched with the external threads are arranged on the inner side face of the adjusting ring, and the adjusting ring can rotate and drive the power assembly to ascend and descend so as to adjust the gap between the movable grinding head and the static grinding head. According to the grinding machine, a user can rotate the adjusting ring to drive the power assembly to ascend and descend, the movable grinding head synchronously ascends and descends along with the power assembly, the movable grinding head and the power assembly have good concentricity, the rotating dynamic balance of the movable grinding head is improved, vibration is reduced, the hand numbness problem caused when the user holds the grinding machine is solved, noise is reduced, and the use experience of the user is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of grinding devices, and specifically relates to a grinding machine. 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, complexity, and limited application range for users.

[0004] Furthermore, the existing technology, which adjusts the nut and uses the nut to support the moving grinding head, lacks stability after adjustment. The moving grinding head has to engage with the stationary grinding head with high friction while also engaging with the nut in a lifting and lowering manner, resulting in poor adjustment accuracy. After adjustment, there is a misalignment between the moving grinding head and the motor shaft, causing the moving grinding head to sway and shake during the grinding process, resulting in structural instability.

[0005] Based on this, during the research and development process, the applicant conceived of a way to adjust the grinding head more directly without interrupting the grinding operation by using the adjustment ring to drive the lifting mechanism. This would allow for dynamic adjustment of the grinding head's coarseness. However, during further research and development, the applicant discovered that after the grinding head moves up and down, its concentricity with the motor deteriorates. This leads to increased vibration between the grinding head, the motor, and the main unit during the grinding process. Users may experience numbness in their hands when holding the grinding machine, and the grinding noise also increases. Utility Model Content

[0006] This invention provides a grinding machine to solve the problems of complex coarseness adjustment operation in the prior art, which leads to poor concentricity between the moving grinding head and the motor after adjustment, resulting in violent oscillation of the moving grinding head and high working noise.

[0007] The technical solution adopted in this utility model is as follows:

[0008] This utility model provides a grinding machine, including a main unit with a mounting cavity, a stationary grinding head disposed in the mounting cavity, and a movable grinding head that cooperates with the stationary grinding head. It also includes: a power assembly, which is vertically and flexibly mounted in the mounting cavity; the movable grinding head is driven by the power assembly and rises and falls with the power assembly; the power assembly has an external thread on its outer periphery; and an adjusting ring, which is sleeved on the outer periphery of the power assembly; the adjusting ring has an internal thread matching the external thread on its inner surface; the adjusting ring is rotatable and drives the power assembly to rise and fall, thereby adjusting the gap between the movable grinding head and the stationary grinding head.

[0009] The grinding machine provided by this utility model has an external thread on the outer periphery of the power component and an internal thread on the adjusting ring. Therefore, the user can directly rotate the adjusting ring to drive the power component to rise and fall, and the moving grinding head rises and falls with the power component. Thus, during the adjustment process, the moving grinding head and the power component can move up and down synchronously, thereby keeping the moving grinding head and the power component relatively stationary. This ensures good concentricity between the moving grinding head and the power component after adjustment, improves the rotational dynamic balance of the moving grinding head, reduces vibration during grinding operations, alleviates the problem of numbness in the user's hands when holding the grinding machine, and also reduces noise caused by vibration, thus improving the user experience.

[0010] Furthermore, this invention uses an adjusting ring to drive the power assembly's lifting and lowering, preventing the moving grinding head from being directly subjected to the lifting force. The moving grinding head only needs to precisely engage with the stationary grinding head, achieving functional separation. During lifting and adjusting, the moving grinding head moves stably without wobbling, ensuring high adjustment precision. Simultaneously, the moving grinding head's stable structure prevents shaking, achieving reliable grinding. Additionally, by fitting the adjusting ring around the power assembly's outer circumference, users can directly rotate the ring for operation without touching the power assembly's shaft. The entire adjustment process does not require disassembling the main unit or stopping the grinding operation, enabling continuous grinding and making operation more convenient. It is not only suitable for coffee beans but also for grinding various medicinal materials, meeting the needs of different coarseness levels and mixing, thus expanding the grinder's applicability.

[0011] In a preferred embodiment, the power assembly includes a lifting seat and a motor fixed to the lifting seat. The external thread is provided on the outer periphery of the lifting seat. The moving grinding head is driven by the rotating shaft of the motor. The adjusting ring rotates to drive the lifting seat to rise and fall. The lifting seat drives the motor to rise and fall.

[0012] The power assembly includes a lifting seat and a motor. The lifting seat is independently set, and the external thread on the lifting seat can improve the machining accuracy of the external thread, thereby improving the precision of lifting adjustment and the smoothness of the fit between the adjusting ring and the lifting seat, making it easier for users to operate. Moreover, there is no need to additionally machine the external thread of the motor, and the independent lifting seat can be machined, simplifying the machining and production process.

[0013] In a preferred embodiment, the moving grinding head is located below the motor and fixed to the motor's rotating shaft, and the moving grinding head moves up and down with the motor.

[0014] In a preferred embodiment, the moving grinding head is located above the motor and fixed to the motor's rotating shaft, and the moving grinding head moves up and down with the motor.

[0015] By placing the moving grinding head below the motor, the ground material can fall downwards under its own weight, preventing blockages in the grinding chamber and ensuring efficient and thorough discharge without the need for an additional material guiding structure. Conversely, placing the moving grinding head above the motor lowers the overall center of gravity, improving structural stability. Regardless of its location, the moving grinding head moves up and down with the motor, increasing concentricity and reducing vibration and noise.

[0016] In a preferred embodiment, the moving grinding head is located above the motor, and the lifting seat includes a bearing that supports the moving grinding head and a fixing part that fixes the motor. The bearing is sleeved on the outer circumference of the rotating shaft, and the lifting seat drives the motor and the moving grinding head to rise and fall together.

[0017] By installing a bearing on the lifting seat, which is sleeved on the outer circumference of the rotating shaft, the rotating shaft can rotate smoothly relative to the lifting seat, avoiding interference. At the same time, the lifting seat supports the moving grinding head through the bearing, and the lifting seat drives the motor and the moving grinding head to rise and fall together, thereby realizing the detachable connection between the moving grinding head and the rotating shaft of the motor. This makes it convenient for users to disassemble the moving grinding head for cleaning, ensuring hygiene and preventing odor transfer.

[0018] In a preferred embodiment, the lifting seat isolates the motor from the moving grinding head, and the lifting seat includes a grinding cavity for accommodating the moving grinding head, with the external thread disposed on the outer wall of the grinding cavity.

[0019] The lifting seat not only serves to fix the motor so that it can move up and down, but also acts as an isolation component to prevent the material ground by the moving grinding head from splashing onto the motor, causing powder to enter the motor and become difficult to clean, thus affecting the motor's lifespan. With the isolation provided by the lifting seat, there is no need to set up an additional discharge hopper or grinding hopper, thereby reducing the number of parts in the machine and simplifying the overall structure.

[0020] In a preferred embodiment, the lifting seat includes a heat dissipation cavity surrounding the motor, a fan is disposed inside the heat dissipation cavity, and the external thread is disposed on the outer wall of the heat dissipation cavity.

[0021] The lifting base not only serves to fix the motor so that it can move up and down, but it can also form a heat dissipation cavity to gather the airflow driven by the fan to dissipate heat from the motor, thereby improving the heat dissipation effect. There is no need to set up an additional heat dissipation cover, thus simplifying the parts and the overall structure of the machine.

[0022] In a preferred embodiment, the power component is an electric motor, the moving grinding head is driven by the motor shaft, the external thread is provided on the motor housing, and the adjusting ring rotates to drive the motor to lift and lower.

[0023] By directly setting the external thread on the motor housing, on the one hand, the adjusting ring directly engages with the motor to directly drive the motor to lift and lower without the need for an additional transmission structure, simplifying the overall structure; on the other hand, only the adjusting ring needs to be limited during installation, and the motor can be installed inside the main unit through the adjusting ring, thereby achieving reliable motor installation, further simplifying the overall structure, achieving a compact structure, and making assembly easy.

[0024] In a preferred embodiment, the host is provided with an installation cylinder, the power component and the adjusting ring are respectively located inside and outside the installation cylinder, the outer wall of the power component is arranged with a plurality of protrusions at intervals along the circumference, the outer surface of the protrusions is provided with external threads, the side wall of the installation cylinder is provided with clearance notches for the external threads to connect with the internal threads, and the protrusions are engaged in the clearance notches.

[0025] By incorporating a mounting cylinder within the main unit, the adjusting ring is located on the outer circumference of the mounting cylinder, achieving radial limiting and ensuring the adjusting ring's stable position. This maintains concentricity during rotation, preventing jamming, and allows the power assembly and moving grinding head to reliably rise and fall through the engagement of the internal and external threads. The external thread is achieved using a protrusion on the power assembly; for example, if the power assembly is a motor, a protrusion is provided on the side wall of the motor housing; or, if the power assembly includes a lifting seat and a motor, a protrusion is provided on the outer circumference of the lifting seat. An clearance notch is provided in the mounting cylinder, and the protrusion engages within this notch, creating a stop and limit mechanism for the power assembly and the main unit. This also ensures proper engagement and clearance between the internal and external threads, resulting in a simple structure that eliminates the need for additional stop mechanisms, achieving a compact design.

[0026] In a preferred embodiment, the main unit is provided with an anti-rotation part and a limiting groove located in the mounting cavity. The anti-rotation part limits the rotation of the power component, and the adjusting ring is rotatably installed in the limiting groove and is axially limited by the limiting groove.

[0027] By setting an anti-rotation part and a limiting groove, the adjusting ring cannot rise or fall when it is rotated. Thus, with the cooperation of the external and internal threads, the power component cannot rotate, thereby driving the power component to rise or fall, which in turn drives the moving grinding head to rise or fall, so that the gap between the moving grinding head and the stationary grinding head can be adjusted. The limiting method is simple and reliable.

[0028] In a preferred embodiment, 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;

[0029] 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.

[0030] In a preferred embodiment, the side wall of the host has an opening communicating with the limiting groove, and the adjusting ring is provided to protrude from the opening into the adjusting part of the host, the adjusting part being an adjusting rod extending from the opening.

[0031] By setting an opening that connects to 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. Attached Figure Description

[0032] 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:

[0033] Figure 1 This is an exploded structural diagram of the grinding machine in Embodiment 1 of this utility model;

[0034] Figure 2 This is a schematic diagram of the overall structure of the grinding machine in Embodiment 1 of this utility model;

[0035] Figure 3 This is a schematic diagram of the cooperation between the adjusting ring and the power component in Embodiment 1 of this utility model;

[0036] Figure 4 This is a partial exploded view of the grinding machine in Embodiment 1 of this utility model;

[0037] Figure 5 This is a cross-sectional structural diagram of the grinding machine in Embodiment 1 of this utility model;

[0038] Figure 6 for Figure 5Enlarged view of part A in the middle;

[0039] Figure 7 This is a schematic diagram of the cooperation between the power component and the moving grinding head in Embodiment 1 of this utility model;

[0040] Figure 8 This is a schematic diagram of the power component in Embodiment 2 of this utility model;

[0041] Figure 9 This is a schematic diagram of the grinding machine in Embodiment 3 of this utility model;

[0042] Figure 10 This is a schematic diagram of the power component in Embodiment 4 of this utility model;

[0043] Figure 11 This is a schematic diagram of the power component in Embodiment 5 of this utility model.

[0044] List of components and reference numerals: 10. Main unit; 101. Anti-rotation part; 102. Limiting groove; 11. Upper housing; 111. Mounting cylinder; 12. Lower housing; 13. Discharge bin; 14. Feed bin; 100. Power assembly; 20. Motor; 21. Screw; 30. Moving grinding head; 40. Stationary grinding head; 50. Lifting seat; 513. Bearing; 5131. Outer ring; 5132. Inner ring; 51. Grinding chamber; 52. Heat dissipation chamber; 60. Adjusting ring; 601. Internal thread; 602. Adjusting rod; 70. External thread; 71. Protrusion; 80. Fan; 90. Powder receiving cup. Detailed Implementation

[0045] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] In one embodiment, this utility model provides a grinding machine, such as... Figure 1-7 As shown, the device includes a main unit 10 with a mounting cavity, a stationary grinding head 40 disposed within the mounting cavity, and a movable grinding head 30 that mates with the stationary grinding head 40. It also includes a power assembly 100, which is vertically and flexibly mounted in the mounting cavity. The movable grinding head 30 is driven by the power assembly 100 and moves up and down with the power assembly 100. The power assembly 100 has an external thread 70 on its outer periphery. An adjusting ring 60 is sleeved on the outer periphery of the power assembly 100. The inner surface of the adjusting ring 60 has an internal thread 601 that matches the external thread 70. The adjusting ring 60 is rotatable and drives the power assembly 100 to move up and down, thereby adjusting the gap between the movable grinding head 30 and the stationary grinding head 40.

[0051] The grinding machine provided by this utility model has an external thread 70 on the outer periphery of the power assembly 100 and an internal thread 601 on the adjusting ring 60. Therefore, combined with Figure 3As shown, the user can directly rotate the adjusting ring 60 to raise and lower the power component 100. The moving grinding head 30 rises and falls along with the power component 100. During adjustment, the moving grinding head 30 and the power component 100 move synchronously, ensuring they remain relatively stationary. This guarantees good concentricity between the moving grinding head 30 and the power component 100 after adjustment. High concentricity improves the rotational dynamic balance of the moving grinding head 30, reducing vibration during grinding operations and alleviating hand numbness when holding the grinder. It also reduces noise caused by vibration, improving the user experience. Furthermore, this invention uses the adjusting ring 60 to raise and lower the power component 100, preventing the moving grinding head 30 from being directly driven by the lifting force. The moving grinding head 30 only needs to precisely engage with the stationary grinding head 40, achieving functional separation. During adjustment, the moving grinding head 30 moves stably without swaying, ensuring high adjustment precision. Simultaneously, the stable structure of the moving grinding head 30 prevents shaking, achieving reliable grinding. In addition, by fitting the adjusting ring 60 onto the outer periphery of the power assembly 100, the user can directly rotate the adjusting ring 60 to operate without touching the shaft of the power assembly 100. The entire adjustment process does not require disassembling the main unit 10 or stopping the grinding operation, thus achieving continuous grinding and making the operation more convenient for the user. It is not only suitable for coffee beans, but also for grinding different medicinal materials, meeting the needs of different medicinal materials for different coarseness and mixing, thus expanding the applicability of the grinder.

[0052] This utility model does not limit the structure of the host 10, such as Figure 2 , 4 As shown, the host 10 is provided with an anti-rotation part 101 and a limiting groove 102 located in the mounting cavity. The anti-rotation part 101 limits the rotation of the power assembly 100. The adjusting ring 60 is rotatably installed in the limiting groove 102 and is axially limited by the limiting groove 102.

[0053] By setting the anti-rotation part 101 and the limiting groove 102, when the adjusting ring 60 is rotated, the adjusting ring 60 cannot be raised or lowered. Thus, with the cooperation of the external thread 70 and the internal thread 601, the power component 100 cannot be rotated, thereby driving the power component 100 to be raised or lowered, which in turn drives the moving grinding head 30 to be raised or lowered, so that the gap between the moving grinding head 30 and the stationary grinding head 40 is adjusted. The limiting method is simple and reliable.

[0054] As a preferred option, such as Figure 2 As shown, the host 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.

[0055] More preferably, such as Figure 2 ,3 As shown, the side wall of the host 10 has an opening that communicates with the limiting groove 102. The side wall of the host has an opening that communicates with the limiting groove. An adjustment ring is provided and exposed outside the opening to the adjustment part of the host. The adjustment part is an adjustment rod 602 extending out of the opening.

[0056] like Figure 1 As shown, the main unit 10 also includes a feed bin 14 and a discharge bin 13 to facilitate feeding and discharging.

[0057] By dividing the main unit 10 into an upper housing 11 and a lower housing 12, and using the upper housing 11 and lower housing 12 to form a limiting groove 102, the machining difficulty of the limiting groove 102 is reduced, which is beneficial 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 lower housing 12 are installed, the adjusting ring 60 can be directly axially limited, simplifying the installation of the adjusting ring 60 and improving assembly efficiency. By setting an opening that communicates with 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 the user to perform the tossing operation and simplifies the user's operation. 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.

[0058] More specifically, such as Figure 4 As shown, the host 10 is provided with a mounting cylinder 111 inside. For example, the mounting cylinder 111 is located in the upper housing 11. The power assembly 100 and the adjusting ring 60 are located inside and outside the mounting cylinder 111, respectively. The outer wall of the power assembly 100 is arranged with a plurality of protrusions 71 at intervals along the circumference. The outer surface of the protrusions 71 is provided with the external thread 70. The side wall of the mounting cylinder 111 is provided with a clearance notch for the external thread 70 to connect with the internal thread 601. The protrusions 71 are engaged in the clearance notch, and the clearance notch forms the aforementioned anti-rotation part 101.

[0059] Of course, in addition to the aforementioned clearance notch, the anti-rotation part 101 can also be an anti-rotation groove or two anti-rotation ribs. For example, a protrusion is provided on the outer periphery of the power assembly 100, which 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.

[0060] By setting an installation cylinder 111 inside the main unit 10, the adjusting ring 60 is located on the outer periphery of the installation cylinder 111 to achieve radial limiting, so that the position of the adjusting ring 60 is stable and remains concentric during rotation, preventing jamming. Then, the cooperation of the internal thread 601 and the external thread 70 drives the power assembly 100 and the moving grinding head 30 to reliably rise and fall. The external thread 70 is set with the protrusion 71 of the power assembly 100. For example, when the power assembly 100 is a motor 20, the protrusion 71 is provided on the side wall of the housing of the motor 20; or, when the power assembly 100 includes a lifting seat 50 and a motor 20, the protrusion 71 is provided on the outer periphery of the lifting seat 50. The installation cylinder 111 has a clearance notch, and the protrusion 71 is engaged in the clearance notch to form a rotation-stopping limit between the power assembly 100 and the main unit 10. At the same time, it also forms a clearance between the internal thread 601 and the external thread 70. The structure is simple and does not require an additional stop structure, achieving a compact structure.

[0061] In fact, this utility model can also be an integrated host 10, with a separate opening on the side wall of the host 10 to expose the adjustment part of the adjustment ring 60.

[0062] This invention does not limit the specific mating structure of the moving grinding head 30 and the stationary grinding head 40. For example, taking Embodiment 1 as an example, the moving grinding head 30 is conical with a smaller top and a larger bottom, and the stationary grinding head 40 is sleeved on the outer periphery of the moving grinding head 30; or, the stationary grinding head 40 is positioned above the moving grinding head 30, with stationary grinding teeth on the lower end face of the stationary grinding head 40 and grinding teeth on the upper end face of the moving grinding head 30. Regardless of the mating method chosen, the gap between the moving grinding head 30 and the stationary grinding head 40 can be changed during the lifting and lowering of the moving grinding head 30, thereby achieving the coarseness adjustment of the grinding machine.

[0063] It should also be noted that the present invention does not limit the specific structure of the power assembly 100. For example, the power assembly 100 may include a lifting seat 50 and a motor 20, with the lifting seat 50 driving the motor 20 to rise and fall, thereby driving the moving grinding head 30 to rise and fall; or, the power assembly 100 may include a motor 20, with the adjusting ring 60 directly driving the motor 20 to rise and fall, thereby driving the moving grinding head 30 to rise and fall. Specifically, the present invention may adopt any of the following embodiments:

[0064] Implementation Example 1, such as Figure 1-7 As shown, the power assembly 100 includes a lifting base 50 and a motor 20 fixed to the lifting base 50, as... Figure 7 As shown, the external thread 70 is provided on the outer periphery of the lifting seat 50, the moving grinding head 30 is driven by the rotating shaft of the motor 20, the adjusting ring 60 rotates to drive the lifting seat 50 to rise and fall, and the lifting seat 50 drives the motor 20 to rise and fall.

[0065] The power assembly 100 includes a lifting seat 50 and a motor 20. The lifting seat 50 is independently set, and the external thread 70 is set on the lifting seat 50, which can improve the machining accuracy of the external thread 70, thereby improving the accuracy of lifting adjustment and the smoothness of the fit between the adjusting ring and the lifting seat 50, making it easier for users to operate. Moreover, there is no need to perform additional machining of the external thread 70 on the motor 20, and the independent lifting seat 50 can be machined, simplifying the machining and production process.

[0066] like Figure 6 , 7 As shown in this embodiment, the moving grinding head 30 is located above the motor 20. The lifting seat 50 includes a bearing 513 supporting the moving grinding head 30 and a fixing part for fixing the motor 20. The bearing 513 is sleeved on the outer circumference of the rotating shaft. The lifting seat 50 drives the motor 20 and the moving grinding head 30 to rise and fall together.

[0067] Specifically, the bearing 513 includes an outer ring 5131 fixed in the lifting seat 50 and an inner ring 5132 that rotates relative to the outer ring 5131 and is fitted around the outside of the rotating shaft. The moving grinding head 30 is supported by the inner ring 5132. The motor 20 is hoisted and fixed below the fixed part by screws 21.

[0068] Of course, in other implementation examples, optionally, the top surface of the lifting seat 50 supports the moving grinding head 30, and balls or protrusions are provided on the end face; or, the top of the lifting seat 50 is provided with a ring rib to support the moving grinding head 30.

[0069] In this embodiment, the moving grinding head and the motor shaft can be fixedly connected, meaning the user cannot disassemble them; alternatively, the moving grinding head and the motor shaft can be detachably connected, for example, by providing a flat section on the motor shaft, with the moving grinding head engaging with the flat section and being detachable from it. Furthermore, based on this embodiment, the power assembly can also include a gearbox fixed to the motor.

[0070] This embodiment example uses a bearing 513 installed on the lifting seat 50. The bearing 513 is sleeved on the outer circumference of the rotating shaft, allowing the rotating shaft to rotate smoothly relative to the lifting seat 50 without interference. At the same time, the lifting seat 50 supports the moving grinding head 30 through the bearing 513. The lifting seat 50 drives the motor 20 and the moving grinding head 30 to rise and fall together, thereby realizing the detachable connection between the moving grinding head 30 and the rotating shaft of the motor 20. This makes it convenient for users to disassemble the moving grinding head 30 for cleaning, ensuring hygiene and preventing odor transfer.

[0071] Implementation Example 2, such as Figure 8As shown, in this embodiment, the power assembly 100 includes a lifting seat 50 and a motor 20 fixed to the lifting seat 50. The external thread 70 is provided on the outer periphery of the lifting seat 50. The moving grinding head 30 is driven by the rotating shaft of the motor 20. The adjusting ring 60 rotates to drive the lifting seat 50 to rise and fall. The lifting seat 50 drives the motor 20 to rise and fall.

[0072] Unlike Implementation Example 1, the movable grinding head 30 is fixed to the rotating shaft of the motor 20, and the movable grinding head 30 moves up and down with the motor 20.

[0073] Specifically, the lifting seat 50 is provided with a support plate for supporting the motor 20, and the motor 20 is placed on the support plate. Optionally, the motor 20 is locked to the support plate of the lifting seat 50 by screws.

[0074] In fact, the support plate can be the bottom wall of the lifting seat 50 to support the motor 20. Of course, the support plate can also be a surrounding plate around the motor 20, with the motor 20 having a protrusion supported on the surrounding plate, and the support plate located in the middle of the lifting seat.

[0075] In this embodiment, the moving grinding head 30 is positioned above the motor 20.

[0076] The moving grinding head 30 is positioned above the motor 20, which lowers the center of gravity of the entire machine and improves structural stability.

[0077] Implementation Example 3, such as Figure 9 As shown, this embodiment differs from Embodiment 2 in that the movable grinding head 30 is located below the motor 20 and fixed to the rotating shaft of the motor 20, and the movable grinding head 30 rises and falls with the motor 20. The grinding machine also includes a powder receiving cup 90 that cooperates with the main unit 10.

[0078] Understandably, by positioning the moving grinding head 30 below the motor 20, the ground material can fall downwards under its own weight, preventing blockage within the grinding chamber 51. This results in efficient and thorough material discharge without the need for an additional outward material guiding structure. Of course, whether the moving grinding head 30 is positioned above or below the motor 20, it can rise and fall with the motor 20, improving the concentricity between the moving grinding head 30 and the motor 20 and reducing overall machine vibration and noise.

[0079] Implementation Example 4, such as Figure 10 As shown, the lifting seat 50 also includes a heat dissipation cavity 52 surrounding the motor 20, a fan 80 is provided inside the heat dissipation cavity 52, and the external thread 70 is provided on the outer cavity wall of the heat dissipation cavity 52.

[0080] The lifting seat 50 not only serves to fix the motor 20 so as to drive the motor 20 to rise and fall, but also forms a heat dissipation cavity 52, which gathers the airflow driven by the fan 80 to dissipate heat from the motor 20, thereby improving the heat dissipation effect. There is no need to set up an additional heat dissipation cover, thus simplifying the parts and the overall structure of the machine.

[0081] More preferably, the lifting seat 50 isolates the motor 20 from the moving grinding head 30, and the lifting seat 50 includes a grinding cavity 51 for accommodating the moving grinding head 30.

[0082] The lifting seat 50 not only serves to fix the motor 20 so that it can drive the motor 20 to rise and fall, but also serves as an isolation component to prevent the material ground by the moving grinding head 30 from splashing onto the motor 20, preventing powder from entering the motor 20 and becoming impossible to clean, and preventing the motor 20 from being affected in terms of lifespan. With the isolation provided by the lifting seat 50, there is no need to set up an additional discharge chamber 13 or grinding chamber, thereby reducing the number of parts in the whole machine and simplifying the overall structure.

[0083] In other implementation examples, optionally, the lifting seat 50 is provided only with a grinding cavity 51, and the external thread 70 is provided on the outer cavity wall of the grinding cavity 51; or, the lifting seat 50 is provided only with a heat dissipation cavity 52.

[0084] Implementation Example 5, such as Figure 11 As shown, the difference between this embodiment and embodiment 1 lies in the power component 100. In this embodiment, the power component 100 is a motor 20, the moving grinding head 30 is driven by the rotating shaft of the motor 20, the external thread 70 is provided on the housing of the motor 20, and the adjusting ring 60 rotates to drive the motor 20 to rise and fall.

[0085] By directly setting the external thread 70 on the housing of the motor 20, on the one hand, the adjusting ring 60 directly cooperates with the motor 20 to directly drive the motor 20 to lift and lower without the need for an additional transmission structure, thus simplifying the overall structure; on the other hand, only the adjusting ring 60 needs to be limited during installation, and the motor 20 can be installed inside the main unit 10 through the adjusting ring 60, thereby achieving reliable installation of the motor 20, further simplifying the overall structure, achieving a compact structure, and making assembly easy.

[0086] As an alternative embodiment of this embodiment, the power assembly 100 is a motor 20, and the external thread 70 is provided on the outer periphery of the motor bracket of the motor 20.

[0087] Alternatively, the motor includes a motor body and a gearbox that are fixedly connected to the motor body, with an external thread 70 provided on the outer periphery of the gearbox.

[0088] In addition, in this embodiment, the motor 20 inside the host 10 is either top-mounted or bottom-mounted, that is, the moving grinding head 30 can be located above or below the motor 20.

[0089] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0090] 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.

[0091] The above description is merely an embodiment of this utility model and is 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 stationary grinding head disposed within the mounting cavity, and a movable grinding head cooperating with the stationary grinding head, characterized in that, Also includes: A power assembly is mounted vertically in the mounting cavity, the moving grinding head is driven by the power assembly and moves up and down with the power assembly, and the outer periphery of the power assembly is provided with external threads; An adjusting ring is fitted around the outer periphery of the power assembly. The inner surface of the adjusting ring is provided with an internal thread that matches the external thread. The adjusting ring is rotatable and drives the power assembly to rise and fall, thereby adjusting the gap between the moving grinding head and the stationary grinding head.

2. A grinding machine according to claim 1, characterized in that, The power assembly includes a lifting seat and a motor fixed to the lifting seat. The external thread is provided on the outer periphery of the lifting seat. The moving grinding head is driven by the rotating shaft of the motor. The adjusting ring rotates to drive the lifting seat to rise and fall. The lifting seat drives the motor to rise and fall.

3. A grinding machine according to claim 2, characterized in that, The moving grinding head is located below the motor and is fixed to the motor's rotating shaft. The moving grinding head moves up and down with the motor.

4. A grinding machine according to claim 2, characterized in that, The moving grinding head is located above the motor and fixed to the motor's rotating shaft; the moving grinding head moves up and down with the motor. Alternatively, the moving grinding head is located above the motor, and the lifting seat includes a bearing supporting the moving grinding head and a fixing part for fixing the motor. The lifting seat drives the motor and the moving grinding head to rise and fall together.

5. A grinding machine according to claim 2, characterized in that, The lifting seat isolates the motor from the moving grinding head. The lifting seat includes a grinding cavity that accommodates the moving grinding head, and the external thread is provided on the outer wall of the grinding cavity.

6. A grinding machine according to claim 2, characterized in that, The lifting seat includes a heat dissipation cavity surrounding the motor, a fan is installed inside the heat dissipation cavity, and the external thread is provided on the outer wall of the heat dissipation cavity.

7. A grinding machine according to claim 1, characterized in that, The power component is an electric motor, the moving grinding head is driven by the motor shaft, the external thread is provided on the motor housing, and the adjusting ring rotates to drive the motor to lift and lower.

8. A grinding machine according to claim 1, characterized in that, The host is equipped with an installation cylinder. The power component and the adjustment 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 power component. The outer surface of the protrusions is provided with external threads. The side wall of the installation cylinder is provided with clearance notches to allow the external threads to connect with the internal threads. The protrusions are fitted into the clearance notches.

9. A grinding machine according to claim 1, characterized in that, The main unit is provided with an anti-rotation part and a limiting groove located in the mounting cavity. The anti-rotation part prevents and limits the rotation of the power component. The adjusting ring is rotatably installed in the limiting groove and is axially limited by the limiting groove.

10. A grinding machine according to claim 9, characterized in that, 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. Alternatively, the side wall of the main unit has an opening that communicates with the limiting groove, and the adjusting ring is provided with an adjusting part that protrudes from the opening and is an adjusting rod extending from the opening.

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