Grinder for grinding beans, with easily adjustable gap between grinding plates and precise adjustment of the gap

Abstract

The utility model relates to a kind of grinder of bean grinder of convenient adjustment mill gap and gap adjustment accurate bean grinding device, including seat, mill height adjusting device, lower mill, compacting component and regulator, the seat is opened with bean grinding cavity, the lower mill is set in bean grinding cavity in rotating mode, the side wall of the seat is provided with indicating line;The mill height adjusting device includes elastic component and upper mill, the lower end of the elastic component is connected with the upper mill, the mill height adjusting device sits in bean grinding cavity and is located above lower mill, the upper mill and lower mill form grinding gap between, the seat is opened with the discharge port of communicating bean grinding cavity;Realize the precision visual adjustment of grinding gap, improve the precision, consistency and use convenience of manual adjustment.

Description

Technical Field

[0001] This utility model relates to a coffee grinder with a convenient and precise grinding device for adjusting the grinding disc gap. Background Technology

[0002] Coffee grinding devices are widely used in coffee grinding and other fields, meeting users' needs for different grind sizes. Existing grinding devices typically achieve variations in grind size by adjusting the gap between the upper and lower grinding discs. However, existing technology has the following drawbacks and shortcomings: Users need to replace the grinding discs with different types or sizes according to their actual needs. However, in the design of existing grinding devices, replacing the grinding discs is quite cumbersome, and different types of grinding discs may not work properly after installation, making it difficult to meet the diverse needs of users.

[0003] In the existing technology, there may be certain deviations in the size between different grinding discs. When the user replaces the grinding disc, the zero point of the device scale cannot be recalibrated, which causes errors when the user adjusts the grinding gap by the scale reading, thus affecting the grinding accuracy.

[0004] Some coffee grinders use simple mechanical adjustment methods, which cannot achieve high-precision grinding gap adjustment, affecting the stability and consistency of the grinding effect. This is especially noticeable when fine grinding is required. Utility Model Content

[0005] The primary objective of this invention is to provide a grinding device that allows for easy replacement of different types of grinding discs and also features zero-point calibration.

[0006] The second objective of this invention is to provide a coffee grinder that allows for convenient and precise adjustment of the grinding gap.

[0007] The primary objective of this invention is achieved as follows: A bean grinding device that facilitates and precisely adjusts the grinding disc gap includes a base, a grinding disc height adjustment device, a lower grinding disc, a pressing component, and an adjuster. The base has a grinding chamber, and the lower grinding disc is rotatably mounted inside the grinding chamber. Indicator lines are provided on the side wall of the base. The grinding disc height adjustment device includes an elastic component and an upper grinding disc. The lower end of the elastic component is connected to the upper grinding disc. The grinding disc height adjustment device sits inside the grinding chamber and is located above the lower grinding disc. A grinding gap is formed between the upper grinding disc and the lower grinding disc. The seat has a discharge port that communicates with the grinding chamber. The clamping component sits in the inner cavity of the base and is located above the grinding disc height adjustment device. The clamping component and the inner cavity of the base are connected by threads, and the upper end of the elastic component abuts against the clamping component. The regulator is a hollow cavity, and a scale is provided on the outer wall of the regulator along its circumference. The regulator sits on the base and is located above the pressing component. The regulator and the pressing component are connected in a linkage. The rotary adjuster drives the clamping component to rotate, thereby moving the clamping component up or down. When the clamping component moves down, it overcomes the elastic force of the elastic component and moves down, thereby changing the upward movement space of the lower grinding disc and thus adjusting the grinding gap.

[0008] When changing to different grinding discs or when the grinding discs wear out, the user only needs to adjust the grinding gap to the minimum value, remove the adjuster, align the zero-point scale of the adjuster with the indicator line on the side wall of the base, and then reinstall the adjuster and connect it to the clamping component to complete the zero-point calibration. No additional tools or complicated measurement steps are required. Afterwards, by rotating the adjuster, the clamping component is moved up and down to overcome the elastic force of the elastic component and change the grinding gap between the upper and lower grinding discs. The actual size of the grinding gap can be intuitively seen by the direction of the indicator line on the scale, thereby achieving precise and visual adjustment of the grinding gap, improving the accuracy, consistency and ease of use of manual adjustment.

[0009] The primary objective of this utility model can also be achieved by the following technical measures: Furthermore, the elastic component includes an upper ring, a lower ring, a limiting pin, and a spring. The surface of the upper ring is spaced apart with countersunk holes along its circumference, the bottom surface of the upper ring is spaced apart with upper connecting holes along its circumference, and the surface of the lower ring is spaced apart with lower connecting holes along its circumference. The upper ring and the lower ring are arranged one above the other. The lower end of the limiting pin passes through the countersunk hole and connects to the lower ring. The head of the limiting pin is placed inside the countersunk hole. The limiting pin restricts the movement distance of the lower ring. The spring is placed between the upper ring and the lower ring, with the upper end of the spring extending into the upper connecting hole and the lower end of the spring extending into the lower connecting hole. The spring constitutes the reset mechanism of the lower ring. The upper grinding disc is connected to the bottom of the lower ring, and the upper grinding disc moves up and down with the lower ring.

[0010] By designing the elastic component as a combination structure consisting of an upper ring, a lower ring, a limiting pin, and a spring, the pressing component overcomes the spring force to drive the upper ring downward when it moves downward, thereby reducing the upward movement space of the lower ring and limiting the upward movement stroke of the upper grinding disc, thus achieving precise adjustment of the grinding gap. The lower end of the limiting pin passes through the countersunk hole and connects to the lower ring. The head of the limiting pin is housed in the countersunk hole. This not only reliably limits the movement distance of the lower ring and prevents the lower ring and the upper grinding disc from moving excessively and causing the grinding disc to collide and be damaged, but also has a compact structure and is not easy to shake. The two ends of the spring extend into the upper and lower connecting holes respectively, making the spring stable in position and not easy to deviate. The reset stroke is controllable, thereby ensuring that the movement trajectory of the lower ring and the upper grinding disc is constant and highly repeatable during the compression and reset process. Combined with the lifting and lowering of the upper grinding disc, the grinding gap adjustment process is smooth, controllable and consistent, which is conducive to improving grinding accuracy and device life.

[0011] Furthermore, the grinding chamber is provided with positioning posts spaced apart along its circumference, and the lower ring is provided with positioning holes spaced apart along its circumference. The positioning posts are inserted into the corresponding positioning holes to stop the grinding disc height adjustment device from rotating.

[0012] By setting positioning posts at intervals along the circumference inside the grinding chamber and setting corresponding positioning holes on the lower ring, the lower ring can reliably stop rotation after assembly by inserting the positioning posts into the positioning holes. This ensures that the grinding disc height adjustment device only moves up and down axially during operation and does not rotate with the lower grinding disc or other components, effectively avoiding uneven wear, jamming, or grinding disc position shift caused by rotation.

[0013] Furthermore, the clamping component has through holes spaced apart along its circumference, and the adjuster is provided with pins that are inserted into the corresponding through holes to achieve linkage between the adjuster and the clamping component.

[0014] By setting through holes at intervals along the circumference of the clamping component and setting pins that can be inserted into the corresponding through holes on the regulator, a reliable linkage transmission is achieved between the regulator and the clamping component through a plug-in engagement. When the regulator rotates, it can accurately and efficiently transmit torque to the clamping component, thereby driving the clamping component to move up and down synchronously to adjust the grinding gap. This structure is simple, easy to assemble and disassemble, and the connection or separation of the regulator and the clamping component can be achieved by inserting or pulling out the pins. This is beneficial for subsequent zero-point calibration and maintenance operations, while reducing complex transmission structures, lowering manufacturing costs, and improving the stability and reliability of the overall machine operation.

[0015] Furthermore, the top surface of the grinding disc height adjustment device is provided with a blocking pin that prevents the pressing component from moving downward. The blocking pin abuts against the insert pin and prevents the pressing component from rotating in the locking direction, thereby preventing the pressing component from moving downward.

[0016] By setting a blocking pin on the top surface of the grinding disc height adjustment device to prevent the pressing component from moving downwards, and having the blocking pin abut against the pin of the adjuster, when the pressing component rotates to the minimum value of the grinding gap (complete zero-point calibration position), the blocking pin can effectively limit the further rotation of the pressing component in the locking direction, thereby preventing the pressing component from continuing to move downwards, avoiding the upper grinding disc from continuing to move downwards and even pressing against the lower grinding disc, and preventing the grinding disc from hard contact, interference wear or breakage. This structure not only ensures the stability and safety of the zero-point position and prevents over-locking caused by user misoperation, but also improves the service life and reliability of the whole machine. At the same time, the combination of the blocking pin and the pin is simple, easy to process and assemble, and does not add too many parts and costs.

[0017] Furthermore, the inner wall of the grinding chamber is an internally threaded inner wall, and the outer wall of the pressing component is a threaded outer wall. The internally threaded inner wall and the externally threaded outer wall engage to connect the pressing component and the base.

[0018] By designing the inner wall of the grinding chamber as an internally threaded inner wall and the outer wall of the clamping component as a threaded outer wall, and connecting the two with threaded engagement, not only is reliable and stable axial guidance and fixation between the clamping component and the seat achieved, but the fine-tuning characteristics of the threaded drive can also be utilized to achieve smooth and precise upward or downward movement along the axial direction by rotating the clamping component, which is conducive to precise adjustment of the grinding disc gap; at the same time, the threaded engagement structure has high strength and good load-bearing capacity, avoiding problems such as slippage and loosening.

[0019] Furthermore, the top of the clamping component is provided with a gripping part, and the clamping component is spaced apart from the gripping part by the through hole.

[0020] Furthermore, it also includes a top cover, the inner cavity of the regulator is a feeding chamber, and the top cover is detachably disposed at the top opening of the regulator.

[0021] By constructing the inner cavity of the regulator as a feeding chamber and installing a detachable top cover at its open top, coffee beans and other materials waiting to be ground can be directly fed into the regulator from the top, resulting in a short feeding path, convenient operation, and improved ease of use. Furthermore, the top cover effectively prevents foreign objects from falling in and dust from spilling out, avoiding material jumping out or becoming contaminated during grinding, thus improving hygiene and safety. The detachable top cover allows users to easily open and replenish materials or clean the inside of the feeding chamber as needed, simplifying maintenance and improving the overall practicality and user experience of the machine.

[0022] Furthermore, it also includes a motor, the motor's shaft of which is connected to the lower grinding disc, and the motor drives the lower grinding disc to rotate.

[0023] By incorporating a motor into the grinding device and connecting its shaft to the lower grinding disc, the motor can directly drive the lower grinding disc to rotate during operation. Compared to manual or other driving methods, this enables continuous, stable, and efficient grinding. The constant motor speed and stable torque output help ensure consistent particle size and repeatable grinding results, while also reducing user workload and increasing automation. The direct connection between the motor and the lower grinding disc results in a short and efficient transmission chain, reducing the number of intermediate transmission components and minimizing the risk of malfunctions and overall machine maintenance costs.

[0024] The second objective of this utility model is achieved as follows: A coffee grinder further includes a housing, a base, a motor, and a receiving cup. The housing and the base are connected. The motor is placed inside the housing. The motor's shaft passes through the base and is connected to the lower grinding disc. The motor drives the lower grinding disc to rotate. The housing and the base are connected. The housing is provided with a clamping part at the position corresponding to the discharge port. The clamping part clamps the receiving cup. The upper opening of the receiving cup corresponds to the discharge port.

[0025] By incorporating a housing, base, motor, and receiving cup into the overall structure of the coffee grinder, and securely connecting the housing to the base, and placing the motor inside the housing, the internal motor and transmission mechanism are effectively protected from external dust and moisture intrusion, resulting in a more compact and aesthetically pleasing overall appearance. The motor shaft passes through the base and directly connects to the lower grinding disc, ensuring smooth power transmission and structural stability. The housing features a clamping part at the corresponding outlet position to secure the receiving cup, ensuring that the upper opening of the receiving cup precisely aligns with the outlet. This prevents ground powder from spilling and scattering, ensuring concentrated powder collection, and allows users to easily assemble and disassemble the receiving cup with one hand, making operation convenient. The overall structure is reasonable, which helps improve grinding efficiency and ease of use.

[0026] The beneficial effects of this utility model are as follows: This invention utilizes the threaded transmission of the grinding disc height adjustment device, elastic component, and clamping component within the base to allow the upper grinding disc to be raised and lowered axially under the action of spring force. Furthermore, the positioning pin and positioning hole structure provides anti-rotation constraints on the upper grinding disc and its supporting components, ensuring that the upper grinding disc only performs stable axial linear motion. This avoids eccentric swaying and posture changes, making the grinding gap adjustment process more linear and predictable, and significantly improving the stability and repeatability of the grinding disc gap adjustment.

[0027] This invention features a through hole on the outer periphery of the clamping component and a pin on the adjuster. The clamping component and the base are precisely connected via the engagement of the inner and outer threads, creating a reliable linkage between the adjuster and the clamping component. Combined with the scale on the outer wall of the adjuster and the indicator lines on the side wall of the base, and the zero-point calibration methods of adjustment method one (zero point = actual zero gap) and adjustment method two (zero point = minimum safety gap), the zero position of the scale can correspond to both the actual "zero gap" position of the grinding disc and, as needed, the preset minimum safety gap. This achieves visualized, quantifiable, and repeatable precise adjustment of the grinding disc gap, significantly improving the user's controllability and consistency of grinding fineness.

[0028] This invention adds a blocking pin to the top surface of the pressing component, and uses the mutual abutment of the pin and the blocking pin to form a mechanical limiting structure. When the adjuster is rotated to the zero position, the blocking pin will prevent the pressing component from continuing to rotate in the locking direction and move further down, so that the upper grinding disc cannot make a hard impact on the lower grinding disc. This effectively avoids grinding disc collisions and severe wear caused by misoperation, and significantly improves the safety and service life of the grinding device under conditions of frequent adjustment and frequent grinding disc replacement.

[0029] This utility model designs the regulator as a hollow cavity that also functions as a feeding chamber. Through the integrated layout of the top cover, shell, base, motor and receiving cup, the feeding, grinding, discharging and gap adjustment are highly integrated. Users only need to rotate the regulator to complete the fine adjustment of the grinding disc gap in the closed shell. The operation is intuitive and easy to learn. It meets the needs of professional grinding while also taking into account the convenience of use in home and commercial scenarios. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a coffee grinder.

[0031] Figure 2 This is a schematic diagram of a coffee grinder.

[0032] Figure 3 This is a cross-sectional view of a coffee grinder.

[0033] Figure 4 This is an assembly drawing of the top cover, regulator, and grinding device.

[0034] Figure 5 This is an assembly drawing of the top cover, regulator, clamping component, and grinding device.

[0035] Figure 6 This is an assembly drawing of the top cover, adjuster, clamping component, grinding disc height adjustment device, and grinding device.

[0036] Figure 7 This is a schematic diagram of the combination of the regulator, clamping component, and grinding disc height adjustment device.

[0037] Figure 8 A partial sectional view of the combination of the regulator, clamping component, and grinding disc height adjustment device.

[0038] Figure 9 This is a schematic diagram of the grinding chamber of a bean grinding device.

[0039] Figure 10 This is a schematic diagram of the grinding disc height adjustment device.

[0040] Figure 11 This is a schematic diagram of the grinding disc height adjustment device from another angle.

[0041] Figure 12 This is a partial sectional view of the grinding disc height adjustment device. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments: Implementation examples, in conjunction with Figures 2 to 11 As shown, a bean grinding device that facilitates adjustment of the grinding disc gap and allows for precise gap adjustment includes a base 1, a grinding disc height adjustment device 2, a lower grinding disc 3, a pressing component 4, and an adjuster 5. The base 1 has a grinding chamber 11, and the lower grinding disc 3 is rotatably disposed within the grinding chamber 11. An indicator line 12 is provided on the side wall of the base 1. The grinding disc height adjustment device 2 includes an elastic component 21 and an upper grinding disc 22. The lower end of the elastic component 21 is connected to the upper grinding disc 22. The grinding disc height adjustment device 2 sits in the grinding chamber 11 and is located above the lower grinding disc 3. A grinding gap 13 is formed between the upper grinding disc 22 and the lower grinding disc 3. The base 1 has a discharge port 14 that communicates with the grinding chamber 11. The clamping component 4 sits in the inner cavity of the base 1 and is located above the grinding disc height adjustment device 2. The clamping component 4 and the inner cavity of the base 1 are connected by threads. The upper end of the elastic component 21 abuts against the clamping component 4. The regulator 5 is a hollow cavity. The outer wall of the regulator 5 is provided with a scale 51 along its circumference. The regulator 5 sits on the base 1 and is located above the pressing component 4. The regulator 5 and the pressing component 4 are connected in a linkage. The rotary adjuster 5 drives the clamping component 4 to rotate, thereby moving the clamping component 4 up or down. When the clamping component 4 moves down, it overcomes the elastic force of the elastic component 21 and moves down, thereby changing the upward movement space of the lower grinding disc 3 and thus adjusting the grinding gap 13.

[0043] Furthermore, the elastic component 21 includes an upper ring 211, a lower ring 212, a limiting pin 213, and a spring 214. The surface of the upper ring 211 is provided with countersunk holes 2111 spaced apart along its circumference. The bottom surface of the upper ring 211 is provided with upper connecting holes 2112 spaced apart along its circumference. The surface of the lower ring 212 is provided with lower connecting holes 2121 spaced apart along its circumference. The upper ring 211 and the lower ring 212 are arranged one above the other. The lower end of the limiting pin 213 passes through the countersunk hole 2111 and connects to the lower ring 212. The head of the limiting pin 213 is placed inside the countersunk hole 2111. The limiting pin 213 restricts the movement distance of the lower ring 212. The spring 214 is placed between the upper ring 211 and the lower ring 212. The upper end of the spring 214 extends into the upper connecting hole 2112, and the lower end of the spring 214 extends into the lower connecting hole 2121. The spring 214 constitutes the reset mechanism of the lower ring 212. The upper grinding disc 22 is connected to the bottom of the lower ring 212, and the upper grinding disc 22 moves up and down with the lower ring 212.

[0044] Furthermore, the grinding chamber 11 is provided with positioning posts 111 spaced apart along its circumference, and the lower ring 212 is provided with positioning holes 2122 spaced apart along its circumference. The positioning posts 111 are inserted into the corresponding positioning holes 2122 to stop the grinding disc height adjustment device 2 from rotating.

[0045] Furthermore, the clamping component 4 has through holes 41 spaced apart along its circumference, and the adjuster 5 is provided with a pin 52. The pin 52 is inserted into the corresponding through hole 41 to realize the linkage between the adjuster 5 and the clamping component 4.

[0046] Furthermore, the top surface of the grinding disc height adjustment device 2 is provided with a blocking pin 42 that prevents the pressing component 4 from moving downward. The blocking pin 42 abuts against the insert pin 52 and prevents the pressing component 4 from rotating in the locking direction, thereby preventing the pressing component 4 from moving downward.

[0047] Furthermore, the inner wall of the grinding chamber 11 is an internally threaded inner wall, and the outer wall of the pressing component 4 is a threaded outer wall. The internally threaded inner wall and the externally threaded outer wall engage to connect the pressing component 4 and the seat 1.

[0048] Furthermore, the top of the pressing component 4 is provided with a gripping part 43, and the pressing component 4 is spaced apart from the gripping part 43 by the through hole 41.

[0049] Furthermore, it also includes a top cover 6, the inner cavity of the regulator 5 is a feeding chamber 53, and the top cover 6 is detachably disposed at the top opening of the regulator 5.

[0050] Furthermore, it also includes a motor 7, the shaft of which is connected to the lower grinding disc 3, and the motor 7 drives the lower grinding disc 3 to rotate.

[0051] Combination Figure 1 As shown, a coffee grinder also includes a housing 8, a base 81, a motor 7 and a receiving cup 9. The housing 8 is connected to the base 1. The motor 7 is placed inside the housing 8. The rotating shaft of the motor 7 passes through the base 81 and is connected to the lower grinding disc 3. The motor 7 drives the lower grinding disc 3 to rotate. The housing 8 and the base 81 are connected. The housing 8 is provided with a clamping part 82 at the position corresponding to the discharge port 14. The clamping part 82 clamps the receiving cup 9. The upper open opening of the receiving cup 9 corresponds to the discharge port 14.

[0052] Zero-point adjustment method one (zero point = actual "zero gap"): When replacing the upper grinding disc 22, the lower grinding disc 3, or when the grinding discs are worn and need to be recalibrated, the user first rotates the adjuster 5, causing it to move the clamping component 4 downwards along the thread and compress the elastic component 21 until the upper grinding disc 22 and the lower grinding disc 3 just slightly collide. This moment is taken as the reference position where the grinding gap 13 is zero.

[0053] Keeping the clamping component 4 in place, remove the adjuster 5 from the base 1, align the zero mark of the scale 51 on the outer wall of the adjuster 5 with the indicator line 12 on the base 1, and reinstall it. Then, insert the pin 52 back into the corresponding through hole 41 of the clamping component 4 and press it against the blocking pin 42, thereby completing the rapid and accurate calibration of the zero position.

[0054] Afterwards, the user only needs to rotate the adjuster 5 to drive the clamping component 4 to move axially upward or downward, so as to finely adjust the grinding gap 13. The corresponding scale can be read intuitively by the direction of the indicator line 12 on the scale 51, so as to realize the visual quantitative control of the grinding gap 13. When the adjuster 5 is rotated to the zero position, the blocking pin 42 abuts against the insertion pin 52, which effectively limits the clamping component 4 to continue to rotate in the locking direction and move further downward, preventing the upper grinding disc 22 from continuing to move downward and making hard contact with the lower grinding disc 3 or excessive clamping, thus avoiding damage to the grinding disc.

[0055] Zero-point adjustment method one example: When the user needs to reset the zero point after replacing the lower grinding disc 3, first slowly rotate the adjuster 5 in the "fine grinding" direction to gradually move the clamping part 4 down. The upper grinding disc 22 will continue to approach the lower grinding disc 3 until the two just touch and make a slight collision sound. At this time, the grinding gap 13 is considered to be zero and the rotation is stopped.

[0056] Remove the adjuster 5 while keeping it in the same position, rotate the outer ring of the scale until the "0" mark coincides with the indicator line 12 of the base 1, and then reinstall the adjuster 5 so that the pin 52 is reinserted into the corresponding through hole 41 and presses against the blocking pin 42, thereby establishing the correspondence of "scale zero point = actual zero gap".

[0057] During normal use, the user selects the target grinding fineness based on the amount of the scale deviating from zero. If the scale is accidentally rotated back to zero in the "fineer" direction, the blocking pin 42 and the insert pin 52 form a rigid limit to prevent the clamping part 4 from moving further down, and the upper and lower grinding discs 3 will not exceed the zero gap and cause serious impact.

[0058] Zero point adjustment method two (zero point = "minimum safety clearance"): When replacing the upper grinding disc 22, the lower grinding disc 3, or when the "minimum safe grinding gap 13" needs to be recalibrated after wear, the user first rotates the adjuster 5 to move the clamping component 4 downward along the thread and compress the elastic component 21 until the upper and lower grinding discs 3 collide. The user judges by the collision sound that the grinding gap 13 is close to zero or slightly negative, and records the through hole 41 corresponding to the pin 52 as the "designated hole".

[0059] Then, the adjuster 5 is removed from the base 1 and the clamping component 4 is rotated counterclockwise to move it upward along the thread and widen the grinding gap 13. According to the pre-designed structure of equally divided through holes 41 (for example, 50 through holes 41 are evenly distributed along the circumference), each pair of adjacent holes corresponds to a fixed axial displacement.

[0060] When the clamping component 4 retracts from the "designated hole" to the position corresponding to the preset gap, the zero mark of the scale 51 on the outer wall of the adjuster 5 is aligned with the indicator line 12 of the base 1 and reinstalled, so that the pin 52 is inserted into the new corresponding through hole 41 and abuts against the blocking pin 42, thereby achieving the calibration of "scale zero point = minimum safety gap".

[0061] Afterwards, the user can finely adjust the grinding gap 13 by rotating the adjuster 5 and read the scale value. When the adjuster 5 is rotated to zero, the blocking pin 42 and the insert pin 52 are stopped to ensure that the preset positive gap is still maintained between the grinding discs, thus avoiding hard collisions from the source.

[0062] Example of zero-point adjustment method two: Taking a preset minimum safe grinding gap of 13 as 0.1 mm as an example, assuming that the clamping component 4 has 50 through holes 41 evenly distributed around its circumference, and designed according to the thread lead so that the axial displacement corresponding to each two adjacent through holes 41 is 0.02 mm, then "retreating 5 holes" corresponds exactly to a gap of 0.1 mm.

[0063] The specific operation is as follows: The user first rotates the adjuster 5 to move the clamping part 4 down until the upper grinding plate 22 and the lower grinding plate 3 collide and record the through hole 41 corresponding to the pin 52 at this moment as the "designated hole".

[0064] Then remove the adjuster 5 and rotate the clamping component 4 counterclockwise so that it retracts 5 holes from the "designated hole" position along the circumference, corresponding to an axial upward movement of 5 × 0.02 mm = 0.1 mm. At this time, the actual grinding gap 13 between the grinding discs is 0.1 mm. In this position, align the zero point of the regulator 5 with the indicator line 12 of the base 1 and reinstall it, so that the pin 52 is inserted into the current through hole 41 and abuts against the blocking pin 42, thereby completing the zero point calibration.

[0065] During subsequent use, when the indicator needle points to the zero point of the scale, the actual grinding gap 13 is 0.1 mm, which is the minimum safe gap. Users can adjust the grinding coarseness according to the amount of deviation of the scale from the zero point. Even if the scale is accidentally turned back to the zero point, the blocking structure will prevent the pressing part 4 from moving further down, thereby avoiding direct collision between the upper and lower grinding discs 3.

Claims

1. A bean grinding device that facilitates and precisely adjusts the grinding disc gap, comprising a base, a grinding disc height adjustment device, a lower grinding disc, a clamping component, and an adjuster, characterized in that: The base has a grinding chamber, the lower grinding disc is rotatably mounted in the grinding chamber, and indicator lines are provided on the side wall of the base; The grinding disc height adjustment device includes an elastic component and an upper grinding disc. The lower end of the elastic component is connected to the upper grinding disc. The grinding disc height adjustment device sits inside the grinding chamber and is located above the lower grinding disc. A grinding gap is formed between the upper grinding disc and the lower grinding disc. The seat has a discharge port that communicates with the grinding chamber. The clamping component sits in the inner cavity of the base and is located above the grinding disc height adjustment device. The clamping component and the inner cavity of the base are connected by threads, and the upper end of the elastic component abuts against the clamping component. The regulator is a hollow cavity, and a scale is provided on the outer wall of the regulator along its circumference. The regulator sits on the base and is located above the pressing component. The regulator and the pressing component are connected in a linkage. The rotary adjuster drives the clamping component to rotate, thereby moving the clamping component up or down. When the clamping component moves down, it overcomes the elastic force of the elastic component and moves down, thereby changing the upward movement space of the lower grinding disc and thus adjusting the grinding gap.

2. The grinding device for conveniently adjusting the grinding disc gap and achieving precise gap adjustment as described in claim 1, characterized in that: The elastic component includes an upper ring, a lower ring, a limiting pin, and a spring. The surface of the upper ring has countersunk holes spaced apart along its circumference, the bottom surface of the upper ring has upper connecting holes spaced apart along its circumference, and the surface of the lower ring has lower connecting holes spaced apart along its circumference. The upper ring and the lower ring are arranged one above the other. The lower end of the limiting pin passes through the countersunk hole and connects to the lower ring. The head of the limiting pin is placed inside the countersunk hole. The limiting pin restricts the movement distance of the lower ring. The spring is placed between the upper ring and the lower ring, with the upper end of the spring extending into the upper connecting hole and the lower end of the spring extending into the lower connecting hole. The spring constitutes the reset mechanism of the lower ring. The upper grinding disc is connected to the bottom of the lower ring, and the upper grinding disc moves up and down with the lower ring.

3. The grinding device for conveniently adjusting the grinding disc gap and achieving precise gap adjustment as described in claim 2, characterized in that: The grinding chamber is provided with positioning posts spaced apart along its circumference, and the lower ring is provided with positioning holes spaced apart along its circumference. The positioning posts are inserted into the corresponding positioning holes to stop the grinding disc height adjustment device from rotating.

4. The grinding device for conveniently adjusting the grinding disc gap and achieving precise gap adjustment as described in claim 1, characterized in that: The clamping component has through holes spaced apart along its circumference, and the adjuster is provided with pins. The pins are inserted into the corresponding through holes to realize the linkage between the adjuster and the clamping component.

5. The grinding device for conveniently adjusting the grinding disc gap and achieving precise gap adjustment according to claim 4, characterized in that: The top surface of the grinding disc height adjustment device is provided with a blocking pin that prevents the pressing component from moving downward. The blocking pin abuts against the insert pin and prevents the pressing component from rotating in the locking direction, thereby preventing the pressing component from moving downward.

6. The grinding device for conveniently adjusting the grinding disc gap and achieving precise gap adjustment according to claim 4, characterized in that: The inner wall of the grinding chamber is an internally threaded inner wall, and the outer wall of the pressing component is a threaded outer wall. The internally threaded inner wall and the externally threaded outer wall mesh to connect the pressing component and the base.

7. The grinding device for conveniently adjusting the grinding disc gap and achieving precise gap adjustment as described in claim 6, characterized in that: The top of the clamping component is provided with a gripping part, and the clamping component is provided with the through holes spaced apart from the periphery of the gripping part.

8. The grinding device for conveniently adjusting the grinding disc gap and achieving precise gap adjustment according to claim 1, characterized in that: It also includes a top cover, the inner cavity of the regulator is a feeding chamber, and the top cover is detachably disposed at the top opening of the regulator.

9. The grinding device for conveniently adjusting the grinding disc gap and achieving precise gap adjustment according to claim 1, characterized in that: It also includes a motor, the motor's shaft of which is connected to the lower grinding disc, and the motor drives the lower grinding disc to rotate.

10. A coffee grinder employing a grinding device as described in any one of claims 1-8, characterized in that: It also includes a housing, a base, a motor, and a receiving cup. The housing and the base are connected. The motor is placed inside the housing. The motor shaft passes through the base and is connected to the lower grinding disc. The motor drives the lower grinding disc to rotate. The housing and the base are connected. The housing is provided with a clamping part at the position corresponding to the discharge port. The clamping part clamps the receiving cup. The upper opening of the receiving cup corresponds to the discharge port.

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