Bean grinder capable of adjusting thickness

Abstract

The bean grinder comprises a machine shell, a grinding box, a grinding assembly and an adjusting assembly, the grinding box is provided with a grinding cavity, the grinding assembly comprises a fixed grinding disc, a movable grinding disc, a support, a spring and a driving motor, the fixed grinding disc is fixed in the grinding cavity, the support is arranged in the grinding cavity, and the adjusting assembly is arranged on the movable grinding disc. The support is provided with a body part and a rotating shaft protruding out of the bottom face of the body part, the movable grinding disc is installed on the bottom face of the body part, and an output shaft of the driving motor is in transmission connection with the movable grinding disc. The spring is arranged in the second cavity of the output shaft of the driving motor, and the output shaft of the driving motor is embedded in the first cavity of the rotating shaft, so that the distance between the fixed grinding disc and the movable grinding disc can be adjusted, and the distance between the fixed grinding disc and the movable grinding disc can be adjusted. And the spring can be hidden in the rotating shaft and can be prevented from being in contact with coffee powder in the grinding cavity, so that the spring is kept clean, and the cleaning difficulty of the bean grinder is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electrical appliances, and particularly relates to a bean grinder with adjustable thickness. Background Art

[0002] A bean grinder is a machine specifically used for grinding coffee beans into powder. The bean grinder clamps and grinds coffee beans through the cooperation of a rotating moving grinding disc and fixed grinding teeth, and finally produces uniform powder suitable for brewing coffee. The existing bean grinder can adjust the thickness of the ground coffee powder according to the brewing method and personal taste requirements. A spring is sleeved outside the rotating shaft of this bean grinder, and the spring is used to press the moving grinding disc towards the adjusting component. However, this spring is located in the grinding cavity and is in contact with coffee powder for a long time, so that the spring is easily stained with coffee powder and difficult to clean. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a bean grinder with adjustable thickness, which can avoid the spring contacting coffee powder, thereby keeping the spring clean.

[0004] The technical solution of the utility model is realized as follows:

[0005] A bean grinder with adjustable thickness includes a machine shell, a grinding box, a grinding component and an adjusting component. The grinding box and the grinding component are arranged in the machine shell. The grinding box has a grinding cavity with an upper opening, and the adjusting component is arranged at the opening of the grinding cavity;

[0006] The grinding component includes a fixed grinding disc, a moving grinding disc, a bracket, a spring and a driving motor. The fixed grinding disc is fixed in the grinding cavity. The bracket is arranged in the grinding cavity. The bracket has a main body part and a rotating shaft protruding from the bottom surface of the main body part. The moving grinding disc is installed on the bottom surface of the main body part. The rotating shaft passes through the moving grinding disc and the fixed grinding disc and extends towards the bottom of the grinding cavity. The rotating shaft has a first cavity with a lower opening. The upper end of the output shaft of the driving motor has a second cavity with an upper opening. The output shaft of the driving motor passes through the bottom of the grinding box and is embedded in the first cavity, and the bracket can move up and down relative to the output shaft of the driving motor. The top surface of the bracket abuts against the adjusting component. The spring is arranged in the second cavity to always press the bracket towards the adjusting component, and the adjusting component drives the bracket to move up and down to adjust the distance between the fixed grinding disc and the moving grinding disc.

[0007] Preferably, the grinding component further includes an abutting block and a plugging column. The abutting block is installed on the top surface of the first cavity and its lower end extends into the second cavity. The two ends of the spring respectively abut against the bottom surface of the abutting block and the bottom surface of the second cavity. A plugging hole is arranged on the output shaft of the driving motor and below the second cavity. The plugging hole communicates with the second cavity. The lower end of the plugging column passes through the main body part, the abutting block and the spring in sequence and is plugged in the plugging hole.

[0008] Preferably, the diameter of the lower end portion of the insertion post is smaller than the diameter of the middle portion of the insertion post. A stepped portion is formed at the connection between the lower end portion and the middle portion of the insertion post, and the stepped portion abuts against the bottom surface of the second cavity.

[0009] Preferably, the upper end of the output shaft of the drive motor is hexagonal, the upper end of the first cavity is hexagonal, and the upper end of the output shaft of the drive motor is inserted into the upper end of the first cavity.

[0010] Preferably, the adjusting assembly includes a rotary cover, a lifting member, and a fixing member. The rotary cover covers the opening of the grinding cavity. The lifting member is installed at the center of the inner top surface of the rotary cover. The fixing member is installed on the top of the grinding box. A threaded hole is provided at the center of the fixing member. The middle portion of the lifting member is screwed into the threaded hole. The lower end of the lifting member abuts against the top surface of the bracket. When the rotary cover rotates, it drives the lifting member to rotate relative to the fixing member to drive the bracket to move up and down, thereby adjusting the distance between the fixed grinding disc and the moving grinding disc.

[0011] Preferably, the adjusting assembly further includes a chuck disposed inside the rotary cover. A clamping hole is provided at the middle of the chuck. The upper end of the lifting member is clamped in the clamping hole. A plurality of clamping teeth are provided on the side wall of the chuck, and a clamping strip is provided on the inner wall of the rotary cover. The clamping strip is clamped in the space between two adjacent clamping teeth.

[0012] Preferably, the adjusting assembly further includes a mating ring disposed between the lifting member and the bracket. The middle portion of the bottom surface of the lifting member extends downward to form an extension portion. The extension portion extends into the inner hole of the mating ring. The top surface of the mating ring abuts against the bottom surface of the lifting member, and the bottom surface of the mating ring abuts against the top surface of the bracket.

[0013] Preferably, the adjusting assembly further includes a screw. The screw passes through the rotary cover and is screwed to the lifting member.

[0014] Preferably, a feed port is provided on one side of the grinding box, and a discharge port is provided on the other side. Both the feed port and the discharge port communicate with the grinding cavity. The fixed grinding disc and the moving grinding disc are located in the upper part of the grinding cavity. The feed port is provided in the lower part of the grinding box, and the discharge port is provided in the upper part of the grinding box. An inlet is provided on the machine shell corresponding to the feed port, and an outlet is provided on the machine shell corresponding to the discharge port. The coffee beans enter the grinding cavity after passing through the inlet and the feed port in sequence, and the coffee powder generated after being ground by the fixed grinding disc and the moving grinding disc is discharged from the outlet through the discharge port.

[0015] Preferably, the outer wall of the rotating shaft is provided with spiral spokes.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] The coffee bean grinder includes a casing, a grinding box, a grinding assembly and an adjusting assembly. The grinding assembly includes a fixed grinding disc, a movable grinding disc, a bracket, a spring and a driving motor. The output shaft of the driving motor is connected to the movable grinding disc through the bracket transmission. The adjusting assembly abuts against the top surface of the bracket. The spring can make the bracket always press against the adjusting assembly to ensure that the adjusting assembly can drive the bracket to move up and down to adjust the distance between the fixed grinding disc and the movable grinding disc. Since the spring is arranged in the second cavity of the output shaft of the driving motor, the output shaft of the driving motor is embedded in the first cavity of the rotating shaft. The spring can be hidden inside the rotating shaft, which can prevent the spring from contacting the coffee powder in the grinding chamber, thereby keeping the spring clean and reducing the difficulty of cleaning the coffee bean grinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional cross-sectional view of the utility model;

[0019] Figure 2 It is a three-dimensional cross-sectional view of the grinding assembly in the utility model;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the bracket in the utility model;

[0021] Figure 4 It is a three-dimensional structural schematic diagram of the grinding box in the utility model;

[0022] Figure 5 It is a three-dimensional cross-sectional view of the adjustment component in the utility model;

[0023] Figure 6 It is a schematic diagram of the disassembled state of the adjustment component in the utility model;

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the rotary cover in the utility model.

[0025] Figure ID:

[0026] 1- housing; 11- inlet; 12- outlet;

[0027] 2-grinding box; 21-grinding chamber; 22-feeding port; 23-discharging port;

[0028] 3-grinding assembly; 31-fixed grinding disc; 32-moving grinding disc; 33-driving motor; 331-second cavity; 332-plug-in hole; 34-bracket; 341-main body; 3411-limiting ring; 342-rotating shaft; 3421-first cavity; 3422-spoke; 35-abutment block; 36-spring; 37-plug-in column; 371-stepped part;

[0029] 4 - Adjusting assembly; 41 - Screw cap; 411 - Clamping strip; 42 - Lifting member; 421 - Extension portion; 43 - Fixing member; 431 - Threaded hole; 44 - Chuck; 441 - Clamping hole; 442 - Clamping teeth; 45 - Fitting ring; 46 - Screw; 47 - Cover plate; 48 - Decorative cover. Detailed implementation manner

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0032] See Figures 1 to 3 , this embodiment provides a bean grinder with adjustable thickness, including a machine shell 1, a grinding box 2, a grinding assembly 3 and an adjusting assembly 4. The grinding box 2 and the grinding assembly 3 are arranged in the machine shell 1. The grinding box 2 has a grinding cavity 21 with an upper opening, and the adjusting assembly 4 is arranged at the opening of the grinding cavity 21;

[0033] The grinding assembly 3 includes a fixed grinding disc 31, a movable grinding disc 32, a bracket 34, a spring 36 and a driving motor 33. The fixed grinding disc 31 is fixed in the grinding chamber 21. The bracket 34 is arranged in the grinding chamber 21. The bracket 34 has a body 341 and a rotating shaft 342 protruding from the bottom surface of the body 341. The movable grinding disc 32 is installed on the bottom surface of the body 341. The rotating shaft 342 passes through the movable grinding disc 32 and the fixed grinding disc 31 and extends to the bottom of the grinding chamber 21. The rotating shaft 342 has a first cavity 3421 with a lower opening. The upper end of the output shaft of the driving motor 33 has an upper opening. The output shaft of the driving motor 33 passes through the bottom of the grinding box 2 and is embedded in the first cavity 3421. The bracket 34 can move up and down relative to the output shaft of the driving motor 33 to drive the movable grinding disc 32 to move up and down. The output shaft of the driving motor 33 is connected to the movable grinding disc 32 through the bracket 34. The top surface of the bracket 34 abuts against the adjusting component 4. The spring 36 is arranged in the second cavity 331 to make the bracket 34 always press against the adjusting component 4. The adjusting component 4 drives the bracket 34 to move up and down to adjust the distance between the fixed grinding disc 31 and the movable grinding disc 32.

[0034] The spring 36 can make the bracket 34 always press against the adjustment component 4 to ensure that the adjustment component 4 can drive the bracket 34 to move up and down to adjust the distance between the fixed grinding disc 31 and the movable grinding disc 32. Since the spring 36 is arranged in the second cavity 331 of the output shaft of the drive motor 33, and the output shaft of the drive motor 33 is embedded in the first cavity 3421 of the rotating shaft 342, the spring 36 can be hidden inside the rotating shaft 342, which can prevent the spring 36 from contacting the coffee powder in the grinding chamber 21, thereby keeping the spring 36 clean and reducing the difficulty of cleaning the grinder.

[0035] When in use, first adjust the adjustment component 4 according to the brewing method and personal taste requirements. The adjustment component 4 drives the bracket 34 to move up and down to adjust the distance between the fixed grinding disc 31 and the movable grinding disc 32. The larger the distance between the fixed grinding disc 31 and the movable grinding disc 32, the coarser the ground coffee powder is, and the smaller the distance between the fixed grinding disc 31 and the movable grinding disc 32, the finer the ground coffee powder is. Then, coffee beans are put into the grinding chamber 21, and the drive motor 33 is started. The drive motor 33 drives the bracket 34 and the movable grinding disc 32 set on the bracket 34 to rotate, and coffee powder is formed under the grinding action of the movable grinding disc 32 and the fixed grinding disc 31.

[0036] Preferably, see Figure 1 and Figure 2, the grinding assembly 3 further includes an abutting block 35. The abutting block 35 is installed on the top surface of the first cavity 3421 and its lower end extends into the second cavity 331. A spring 36 is arranged in the second cavity 331. The two ends of the spring 36 respectively abut against the bottom surface of the abutting block 35 and the bottom surface of the second cavity 331. A plug hole 332 is provided on the output shaft of the driving motor 33 and below the second cavity 331. The plug hole 332 communicates with the second cavity 331. The grinding assembly 3 further includes a plug post 37. The lower end of the plug post 37 sequentially passes through the body portion 341, the abutting block 35 and the spring 36 and is plugged into the plug hole 332. Relying on the elastic force of the spring 36, the abutting block 35 is always pressed against the bracket 34, and the bracket 34 is always pressed against the adjusting assembly 4, so as to ensure that the adjusting assembly 4 can drive the bracket 34 to move up and down to adjust the distance between the fixed grinding disc 31 and the moving grinding disc 32; passing the plug post 37 through the abutting block 35 and the spring 36 can limit the horizontal displacement of the abutting block 35 and the spring 36, and the lower end of the plug post 37 is plugged into the plug hole 332, and the plug hole 332 limits the horizontal displacement of the plug post 37. Therefore, the settings of the abutting block 35 and the plug post 37 can improve the stability of the spring 36.

[0037] Further, the diameter of the lower end portion of the plug post 37 is smaller than the diameter of the middle portion of the plug post 37. A stepped portion 371 is formed at the junction of the lower end portion and the middle portion of the plug post 37. The stepped portion 371 abuts against the bottom surface of the second cavity 331. The setting of the stepped portion 371 limits the depth of the lower end of the plug post 37 inserted into the plug hole 332, thereby limiting the distance that the bracket 34 moves downward, and avoiding damage to the fixed grinding disc 31 and the moving grinding disc 32 or difficulty in powder output due to the too close distance between the fixed grinding disc 31 and the moving grinding disc 32.

[0038] In this embodiment, in order to prevent the rotating shaft 342 from rotating relative to the output shaft of the driving motor 33 and enable the rotating shaft 342 to rotate synchronously with the output shaft of the driving motor 33, the upper end of the output shaft of the driving motor 33 is set to be hexagonal, and the upper end of the first cavity 3421 is set to be hexagonal. The upper end of the output shaft of the driving motor 33 is inserted into the upper end of the first cavity 3421, and the rotating shaft 342 can move up and down relative to the output shaft of the driving motor 33. In fact, as long as the upper end of the output shaft of the driving motor 33 and the upper end of the first cavity 3421 are both non-circular structures, the rotating shaft 342 can be prevented from rotating relative to the output shaft of the driving motor 33, which is not limited to hexagonal, and shapes such as rhombus, rectangle, heart shape, and special shape can be selected.

[0039] See Figure 1 、 Figure 5 and Figure 6, the adjusting assembly 4 includes a rotary cover 41, a lifting member 42 and a fixing member 43. The rotary cover 41 covers the opening of the grinding chamber 21. The lifting member 42 is installed at the center of the inner top surface of the rotary cover 41. The fixing member 43 is installed on the top of the grinding box 2. A threaded hole 431 is provided in the center of the fixing member 43. The middle part of the lifting member 42 is screwed into the threaded hole 431. The lower end of the lifting member 42 abuts against the top surface of the bracket 34. When the rotary cover 41 rotates, it drives the lifting member 42 to rotate relative to the fixing member 43 to drive the bracket 34 to move up and down, so as to adjust the distance between the stationary grinding disc 31 and the moving grinding disc 32. The fixing member 43 is threadedly connected to the lifting member 42 through its threaded hole 431, which can ensure the stability of the lifting of the lifting member 42. When the rotary cover 41 rotates, the lifting member 42 located at the center of the inner top surface of the rotary cover 41 rotates with the rotary cover 41. Under the cooperation of the threaded hole 431 of the fixing member 43, the lifting member 42 moves up and down relative to the fixing member 43 while rotating. At the same time, the lifting member 42 drives the bracket 34 to move up and down to adjust the distance between the stationary grinding disc 31 and the moving grinding disc 32.

[0040] During use, first rotate the rotary cover 41 according to the brewing method and personal taste requirements. The rotary cover 41 drives the bracket 34 to move up and down through the lifting member 42 to adjust the distance between the stationary grinding disc 31 and the moving grinding disc 32. Then put coffee beans into the grinding chamber 21, start the drive motor 33, and the drive motor 33 drives the bracket 34 and the moving grinding disc 32 arranged on the bracket 34 to rotate. Under the grinding action of the moving grinding disc 32 and the stationary grinding disc 31, coffee powder is formed.

[0041] Preferably, refer to Figure 1 、 Figures 5 to 7 , the adjusting assembly 4 further includes a chuck 44 arranged in the rotary cover 41. A chuck hole 441 is provided in the middle of the chuck 44. The upper end of the lifting member 42 is clamped in the chuck hole 441 so that the chuck 44 is fixed to the upper end of the lifting member 42. A plurality of teeth 442 are provided on the side wall of the chuck 44. A clamping strip 411 is provided on the inner wall of the rotary cover 41. The clamping strip 411 is clamped in the space between two adjacent teeth 442. A clamping groove is formed between two adjacent teeth 442. The clamping strip 411 is clamped in the clamping groove to fix the chuck 44 and the rotary cover 41 to each other. The chuck 44 and the lifting member 42 are fixed to each other, which can prevent the lifting member 42 from not rotating when the rotary cover 41 rotates, so as to ensure that the rotary cover 41 can drive the chuck 44 and the lifting member 42 to rotate when it rotates.

[0042] Preferably, refer to Figure 5 and Figure 6, the adjusting assembly 4 further includes a mating ring 45 disposed between the lifting member 42 and the bracket 34. A central portion of the bottom surface of the lifting member 42 extends downward to form an extension portion 421. The extension portion 421 extends into the inner hole of the mating ring 45. The top surface of the mating ring 45 abuts against the bottom surface of the lifting member 42, and the bottom surface of the mating ring 45 abuts against the top surface of the bracket 34. During the rotation and vertical movement of the lifting member 42, the mating ring 45 does not rotate, but the mating ring 45 will move up and down with the lifting member 42 under the action of the spring 36, which can prevent the lifting member 42 from directly abutting against the bracket 34 and causing the bracket 34 to be worn.

[0043] Preferably, referring to Figures 1 to 3 , a limiting ring 3411 protrudes upward from the top surface of the main body portion 341. The mating ring 45 is located inside the limiting ring 3411. The arrangement of the limiting ring 3411 provides an installation position for the mating ring 45 and at the same time limits the movement space of the mating ring 45 to prevent the mating ring 45 from moving randomly.

[0044] Preferably, referring to Figure 5 and Figure 6 , the adjusting assembly 4 further includes a screw 46. The screw 46 passes through the rotary cover 41 and is screwed to the lifting member 42 to install the lifting member 42 at the center of the inner top surface of the rotary cover 41. In order to hide the screw 46, a cover plate 47 can be provided on the top surface of the rotary cover 41 to cover the screw 46 with the cover plate 47. In this embodiment, a brim extends outward from the outer edge of the fixing member 43. The decorative cover 48 is sleeved on the outside of the rotary cover 41 and is snapped onto the brim, making the appearance of the coffee grinder neater.

[0045] Preferably, referring to Figure 1 and Figure 4 , one side of the grinding box 2 is provided with a feed inlet 22, and the other side is provided with a discharge outlet 23. Both the feed inlet 22 and the discharge outlet 23 communicate with the grinding chamber 21. The stationary grinding disc 31 and the rotating grinding disc 32 are located in the upper part of the grinding chamber 21. The feed inlet 22 is provided in the lower part of the grinding box 2, and the discharge outlet 23 is provided in the upper part of the grinding box 2. The housing 1 is provided with an inlet 11 corresponding to the feed inlet 22 and an outlet 12 corresponding to the discharge outlet 23. The coffee beans enter the grinding chamber 21 after passing through the inlet 11 and the feed inlet 22 in sequence, and the coffee powder generated after being ground by the stationary grinding disc 31 and the rotating grinding disc 32 is discharged from the outlet 12 through the discharge outlet 23. The coffee beans enter the grinding box 2 from the lower part of the grinding box 2 and are discharged from the upper part of the grinding box 2 after being ground. The stationary grinding disc 31 and the rotating grinding disc 32 are located in the upper part of the grinding chamber 21, which can ensure that the coffee beans pass through the area where the stationary grinding disc 31 and the rotating grinding disc 32 are located and ensure that the coffee beans are ground.

[0046] Preferably, referring to Figures 1 to 4 , a spiral spoke 3422 is provided on the outer wall of the rotating shaft 342. The spiral spoke 3422 is beneficial to convey the coffee beans from bottom to top, thereby improving the grinding efficiency.

[0047] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An adjustable-thickness coffee grinder, characterized in that it includes a housing, a grinding box, a grinding assembly and an adjustment assembly. The grinding box and the grinding assembly are arranged inside the housing. The grinding box has a grinding cavity with an upper opening, and the adjustment assembly is arranged at the opening of the grinding cavity; The grinding assembly includes a fixed grinding disc, a moving grinding disc, a bracket, a spring and a driving motor. The fixed grinding disc is fixed inside the grinding cavity. The bracket is arranged inside the grinding cavity. The bracket has a body part and a rotating shaft protruding from the bottom surface of the body part. The moving grinding disc is installed on the bottom surface of the body part. The rotating shaft passes through the moving grinding disc and the fixed grinding disc and extends towards the bottom of the grinding cavity. The rotating shaft has a first cavity with a lower opening. The upper end of the output shaft of the driving motor has a second cavity with an upper opening. The output shaft of the driving motor passes through the bottom of the grinding box and is embedded in the first cavity, and the bracket can move up and down relative to the output shaft of the driving motor. The top surface of the bracket abuts against the adjustment assembly. The spring is arranged in the second cavity to always press the bracket towards the adjustment assembly. The adjustment assembly drives the bracket to move up and down to adjust the distance between the fixed grinding disc and the moving grinding disc.

2. The adjustable-thickness coffee grinder according to claim 1, characterized in that the grinding assembly further includes a abutting block and a plugging column. The abutting block is installed on the top surface of the first cavity and its lower end extends into the second cavity. The two ends of the spring respectively abut against the bottom surface of the abutting block and the bottom surface of the second cavity. A plugging hole is provided on the output shaft of the driving motor and below the second cavity. The plugging hole communicates with the second cavity. The lower end of the plugging column sequentially passes through the body part, the abutting block and the spring and is plugged in the plugging hole.

3. The adjustable-thickness coffee grinder according to claim 2, characterized in that the diameter of the lower end part of the plugging column is smaller than the diameter of the middle part of the plugging column. A stepped part is formed at the connection between the lower end part and the middle part of the plugging column. The stepped part abuts against the bottom surface of the second cavity.

4. The adjustable-thickness coffee grinder according to claim 1, characterized in that the upper end of the output shaft of the driving motor is hexagonal, the upper end of the first cavity is hexagonal, and the upper end of the output shaft of the driving motor is inserted into the upper end of the first cavity.

5. The adjustable-thickness coffee grinder according to claim 1, characterized in that the adjustment assembly includes a rotary cover, a lifting part and a fixing part. The rotary cover covers the opening of the grinding cavity. The lifting part is installed at the center of the inner top surface of the rotary cover. The fixing part is installed on the top of the grinding box. A threaded hole is provided at the center of the fixing part. The middle part of the lifting part is screwed in the threaded hole. The lower end of the lifting part abuts against the top surface of the bracket. When the rotary cover rotates, it drives the lifting part to rotate relative to the fixing part to drive the bracket to move up and down, so as to adjust the distance between the fixed grinding disc and the moving grinding disc.

6. The adjustable-thickness coffee grinder according to claim 5, characterized in that The adjusting assembly further includes a chuck disposed inside the screw cap. A clamping hole is provided in the middle of the chuck. The upper end of the lifting member is clamped in the clamping hole. A plurality of clamping teeth are provided on the side wall of the chuck. A clamping strip is provided on the inner wall of the screw cap. The clamping strip is clamped in the space between two adjacent clamping teeth.

7. The adjustable-thickness coffee grinder according to claim 5, wherein the adjusting assembly further includes a mating ring disposed between the lifting member and the bracket. A middle part of the bottom surface of the lifting member extends downward to form an extension part. The extension part extends into the inner hole of the mating ring. The top surface of the mating ring abuts against the bottom surface of the lifting member. The bottom surface of the mating ring abuts against the top surface of the bracket.

8. The adjustable-thickness coffee grinder according to claim 5, wherein the adjusting assembly further includes a screw. The screw passes through the screw cap and is screwed to the lifting member.

9. The adjustable-thickness coffee grinder according to claim 1, wherein One side of the grinding box is provided with a feed port, and the other side is provided with a discharge port. Both the feed port and the discharge port communicate with the grinding cavity. The fixed grinding disc and the moving grinding disc are located in the upper part of the grinding cavity. The feed port is provided in the lower part of the grinding box, and the discharge port is provided in the upper part of the grinding box. An inlet is provided on the housing corresponding to the position of the feed port, and an outlet is provided on the housing corresponding to the position of the discharge port. Coffee beans enter the grinding cavity after passing through the inlet and the feed port in sequence, and the coffee powder generated after being ground by the fixed grinding disc and the moving grinding disc is discharged from the outlet through the discharge port.

10. The adjustable-thickness coffee grinder according to claim 9, wherein The outer wall of the rotating shaft is provided with spiral spokes.

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