A grinding device

Abstract

The present invention discloses a grinding device, comprising a first grinding head, a driving mechanism for driving the first grinding head to rotate around a rotation axis, a seat body fixedly connected to the driving mechanism and provided with a first blocking portion, a movable adjusting member mounted on the seat body and movable along the rotation axis, a second grinding head forming a grinding gap with the first grinding head, and an adjusting limiting member provided with a limiting portion that cooperates with the first blocking portion to limit the position; the second grinding head is detachably fixed to the movable adjusting member so that the second grinding head can move along with the movable adjusting member to adjust the grinding gap; the adjusting limiting member and the movable adjusting member are detachably fixedly connected so that the two can adjust their positions at the same time, thereby driving the limiting portion to approach or move away from the first blocking portion; when the limiting portion approaches the first blocking portion, the grinding gap is reduced; when the limiting portion is blocked by the first blocking portion, the grinding gap is at a minimum value. The grinding device of the present invention can conveniently adjust the grinding gap of the grinding device to a uniform level, and the user experience is strong.

Description

Technical Field

[0001] The invention belongs to the field of grinding devices, and in particular relates to a grinding device. Background Art

[0002] With the gradual development of the national economy, people's demands for a higher quality of life have become increasingly stringent, and coffee has become a daily beverage in many ordinary households. While the quality of coffee depends crucially on the quality of the coffee beans, the taste of coffee also depends on the freshness of the ground coffee. Even the best coffee beans will deteriorate if ground coffee is left for a period of time. For this reason, more and more dedicated coffee enthusiasts are choosing to own their own coffee bean grinders, grinding their own beans for fresher ground coffee.

[0003] A Chinese patent application (titled: A bean grinding mechanism and bean grinding device; application number: 201720938653.3) discloses a bean grinding mechanism, which has an upper grinding wheel and a lower grinding wheel. The lower grinding wheel is mounted on the motor shaft, and the upper grinding wheel is mounted on the bracket seat through a thread. The upper grinding wheel can adjust the gap between it and the lower grinding wheel up and down through the thread, thereby adjusting the coarseness of the coffee grinding.

[0004] However, the inventors discovered that while this setup can adjust the coarseness of the grind, in actual production, due to assembly errors, the motor shaft's downward extension can vary. This means that different grinders, when adjusting the upper grinding wheel to the same position, can actually produce unequal grinding gaps. This can lead to significant differences in user experience, leading users to believe the manufacturer's quality control is compromised, thus affecting product evaluation. However, if every grinder were to be uniformly assembled during production, significant labor would be required, significantly increasing production costs and reducing efficiency.

[0005] Therefore, a new technology is needed to solve the problem that the grinding gap adjustment of the grinding device in the prior art is not uniform and affects product evaluation. Summary of the Invention

[0006] In order to solve the above problems in the prior art, the present invention provides a grinding device, which can conveniently adjust the grinding gap of the grinding device to be uniform.

[0007] The present invention adopts the following technical solutions:

[0008] A grinding device comprising:

[0009] First grinding head;

[0010] a driving mechanism having an output shaft detachably connected to the first grinding head, for driving the first grinding head to rotate about a rotation axis;

[0011] A seat body is fixedly connected to the driving mechanism, and a first blocking portion is provided on the seat body;

[0012] A movable adjustment member is mounted on the base and can adjust its position along the direction of the rotation axis;

[0013] a second grinding head, forming a grinding gap with the first grinding head; the second grinding head is detachably fixed to the movable adjustment member, so that the second grinding head can be adjusted along with the movable adjustment member to adjust the size of the grinding gap;

[0014] An adjustment limit member is provided with a limit portion that cooperates with the first blocking portion to limit the position; the adjustment limit member and the movable adjustment member are detachably fixedly connected so that the positions of the two can be adjusted at the same time, thereby driving the limit portion to approach or move away from the first blocking portion; when the limit portion approaches the first blocking portion, the grinding gap is reduced; when the limit portion is blocked by the first blocking portion, the grinding gap is at its minimum value.

[0015] As a further improvement of the technical solution of the present invention, the seat body is provided with a first threaded hole along the direction of the rotation axis, and one end of the movable adjustment member is a first external threaded section matching the first threaded hole.

[0016] As a further improvement of the technical solution of the present invention, the seat body is provided with a circumferential surface coaxial with the first threaded hole at one end close to the grinding gap, and the circumferential surface is provided with an arc-shaped movable groove for the movement of the limiting part, and the first blocking part is located at one end of the arc-shaped movable groove close to the grinding gap.

[0017] As a further improvement of the technical solution of the present invention, a second blocking portion is provided at the other end of the arc-shaped movable groove. When the limiting portion approaches the second blocking portion, the grinding gap expands so that the grinding gap is at its maximum value when the limiting portion is blocked by the second blocking portion.

[0018] As a further improvement of the technical solution of the present invention, the seat body includes a cylindrical end provided with the circumferential surface;

[0019] The adjustment limit member includes a side ring portion that surrounds the circumferential surface and is rotatably connected to the cylindrical end, and an end plate portion that is fixedly connected to an end of the side ring portion away from the seat body. The limit portion is located on the side of the side ring portion opposite to the circumferential surface; the end plate portion is detachably fixedly connected to the movable adjustment member.

[0020] As a further improvement of the technical solution of the present invention, it also includes a limiting fixing member;

[0021] The movable adjustment member also includes a limiting convex edge provided at one end of the first external thread section away from the seat body, and the limiting fixing member is fixedly connected to the end plate portion and clamps the limiting convex edge between the limiting fixing member and the end plate portion.

[0022] As a further improvement of the technical solution of the present invention, the limiting convex edge is circumferentially fixedly connected to the limiting fixing piece.

[0023] As a further improvement of the technical solution of the present invention, a first annular tooth coaxial with the first threaded hole is provided on the side of the limiting convex edge away from the seat body; a second annular tooth cooperating with the first annular tooth is provided on the side of the limiting fixing piece facing the limiting convex edge.

[0024] As a further improvement of the technical solution of the present invention, a circle of adjustment scales is provided on the seat body, and an indicator mark corresponding to the adjustment scale is provided on the adjustment limiter.

[0025] As a further improvement of the technical solution of the present invention, a locking mechanism is further included, wherein the locking mechanism includes:

[0026] a plurality of positioning grooves provided on one of the seat body and the adjustment limiter, wherein the positioning grooves are arranged circumferentially around the axis of the first threaded hole;

[0027] A push rod is telescopically inserted into the other of the seat body and the adjustment limit member, and the push rod is telescopic to be inserted into or out of the positioning groove.

[0028] As a further improvement of the technical solution of the present invention, the locking mechanism also includes an elastic member that pushes the push rod toward the direction of the positioning groove. The positioning groove is a spherical groove, and the end of the push rod inserted into the positioning groove is a smooth end that matches the spherical groove.

[0029] As a further improvement of the technical solution of the present invention, the elastic member is a spring sleeved on the push rod.

[0030] As a further improvement of the technical solution of the present invention, the movable adjustment member is provided with a receiving groove, and the second grinding head is fixed in the receiving groove.

[0031] As a further improvement to the technical solution of the present invention, a protruding rotation limiting ridge is provided on the side wall of the accommodating groove, and a rotation limiting groove for the limiting ridge to be embedded in the second grinding head is provided;

[0032] It also includes a threaded limiting piece, which is fixed to the notch of the accommodating groove through a threaded connection to clamp and fix the second grinding head in the accommodating groove.

[0033] As a further improvement of the technical solution of the present invention, it also includes a cover body that envelops the first grinding head and the second grinding head to separate the first grinding head and the second grinding head from the outside world, and the cover body is fixedly connected to the threaded limiter.

[0034] As a further improvement of the technical solution of the present invention, the cover body and the threaded limiter are integrally formed.

[0035] As a further improvement of the technical solution of the present invention, a powder outlet is provided at one end of the cover body away from the base body.

[0036] As a further improvement of the technical solution of the present invention, a powder guiding slope is provided at one end of the cover body away from the base body, and the powder outlet is located at the lower end of the powder guiding slope.

[0037] As a further improvement of the technical solution of the present invention, it also includes a storage bin for accommodating grinding raw materials, the storage bin is arranged on the base body, and the base body is provided with a feeding channel connecting the storage bin with the grinding gap.

[0038] As a further improvement of the technical solution of the present invention, the upper end of the storage bin is a feed inlet.

[0039] As a further improvement of the technical solution of the present invention, it also includes a bin cover for closing the feed port.

[0040] As a further improvement of the technical solution of the present invention, the first grinding head is a conical grinding toothed disc, and the second grinding head is a circular ring toothed disc matching the conical grinding toothed disc.

[0041] As a further improvement of the technical solution of the present invention, the driving mechanism is a motor, and the grinding device further includes a control device for controlling the start and stop of the motor, and a power supply unit for supplying power to the motor and the control device.

[0042] As a further improvement of the technical solution of the present invention, the power supply unit includes a battery and a charging interface for charging the battery.

[0043] As a further improvement of the technical solution of the present invention, the control device includes a control circuit board and a control switch.

[0044] As a further improvement of the technical solution of the present invention, it also includes a longitudinally arranged catheter, a trigger switch arranged adjacent to the lower end of the catheter, and a trigger element arranged in the catheter so as to be movable up and down; the trigger switch is electrically connected to the control circuit board and is used to control the connection or disconnection of the circuit of the control circuit board; when the trigger element is located at one end of the catheter adjacent to the trigger switch, the trigger switch is triggered to connect the circuit.

[0045] As a further improvement of the technical solution of the present invention, the trigger switch is a Hall switch, and the trigger element is a magnet.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] In the grinding device of the present invention, the second grinding head adjusts the grinding gap by moving the adjustment member on the base body, and the first blocking portion on the base body blocks the limiting portion of the adjustment limit member, thereby limiting the adjustment range of the movable adjustment member connected to the adjustment limit member. Under this structural setting, when the grinding device is assembled at the factory, after the drive mechanism and the first grinding head are installed, the movable adjustment member can be adjusted to adjust the grinding gap to a set minimum value h, and then the limiting portion is pressed against the first blocking portion and the adjustment limit member and the movable adjustment member are fixed. After the connection is completed, the grinding gap can be adjusted to a minimum value h. In other words, during assembly of the grinding device, the minimum value of the grinding gap can be determined by adjusting the position of the adjustment limit member and the movable adjustment member, without considering the installation error of the drive mechanism. The minimum grinding gap of each adjusted grinding device is uniform and equal, achieving standardization, higher efficiency during assembly, and a strong user experience, which is conducive to improving user evaluation of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The technology of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0049] Figure 1 is a cross-sectional view of the grinding device of the present invention;

[0050] Figure 2 is a cross-sectional view of the grinding device of the present invention from another perspective;

[0051] Figure 3 is a schematic diagram of the drive mechanism of the present invention;

[0052] Figure 4 is an exploded view of the drive mechanism of the present invention;

[0053] Figure 5 is a schematic diagram of the seat body of the present invention;

[0054] Figure 6 is an exploded view of the seat body of the present invention;

[0055] Figure 7 This is an exploded view of the assembly of the seat body, movable adjustment member, adjustment limit member, and limit fixing member of the present invention;

[0056] Figure 8 This is an exploded view of the assembly of the seat body, movable adjustment member, adjustable limit member, and limit fixing member of the present invention from another perspective;

[0057] Figure 9 This is an exploded view of the assembly of the base, movable adjustment member, first grinding head, second grinding head, and cover of the present invention;

[0058] Figure 10 is an overall exploded view of the grinding device of the present invention;

[0059] Figure 11 It is an overall assembly view of the grinding device of the present invention.

[0060] Reference numerals:

[0061] 10- first grinding head;

[0062] 20 - driving mechanism; 201 - output shaft; 202 - nut; 203 - battery; 2031 - charging port; 204 - control circuit board; 205 - control switch; 206 - conduit; 207 - trigger switch; 208 - trigger element; 209 - inner shell;

[0063] 30 - seat; 301 - first threaded hole; 302 - circumferential surface; 303 - arc-shaped movable groove; 304 - cylindrical end; 305 - adjustment scale; 306 - mounting hole; 307 - feeding channel; 308 - first blocking portion; 309 - second blocking portion;

[0064] 40 - movable adjustment member; 401 - first external thread segment; 402 - limiting convex edge; 4021 - first annular tooth; 403 - accommodating groove; 4031 - rotation limiting convex strip; 404 - thread limiting member;

[0065] 50-second grinding head; 501-rotation limit slot;

[0066] 60-adjusting limiter; 601-limiting portion; 602-side ring portion; 603-end plate portion; 604-indicator mark;

[0067] 70-limiting fixing member; 701-second annular tooth;

[0068] 80-locking mechanism; 801-positioning groove; 802-thrust rod; 8021-smooth end; 803-elastic member;

[0069] 90-cover body; 901-powder outlet; 902-powder guide slope;

[0070] 100-Storage silo; 1001-Feeding port; 1002-Silo cover. DETAILED DESCRIPTION

[0071] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other unless there is a conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0072] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, terms such as "upper," "lower," "left," and "right" used in this disclosure are intended solely to describe the relative positions of the components of the disclosure as shown in the accompanying drawings.

[0073] Reference Figures 1 to 11 A grinding device includes a first grinding head 10, a driving mechanism 20, a base 30, a movable adjustment member 40, a second grinding head 50 and an adjustment limit member 60.

[0074] Among them, reference Figures 1 to 4 、 Figure 10 The drive mechanism 20 includes an output shaft 201 detachably connected to the first grinding head, for driving the first grinding head 10 to rotate about the rotation axis. The drive mechanism 20 can be a manual rocker or a motor, and is detachably connected to the first grinding head 10 via an output shaft 201 to drive the first grinding head 10 to rotate. More specifically, the output shaft 201 has a flat head with threads at the end. The first grinding head 10 fits over the flat head to achieve circumferential fixation with the output shaft 201. The first grinding head 10 is then tightened and secured to the end of the output shaft 201 via a nut 202.

[0075] Reference Figure 1 、 Figure 5 and Figure 6 The seat 30 is fixedly connected to the driving mechanism 20 and is used to fix the driving mechanism 20. In addition, it is also used to install the second grinding head 50. A through hole is provided on the seat 30 for the output shaft 201 of the driving mechanism 20 to extend out. Figure 7 As shown, a first blocking portion 308 is provided on the seat body 30 .

[0076] Reference Figure 1 、 Figure 7The movable adjustment member 40 is mounted on the base 30 and can be adjusted along the axis of rotation. A grinding gap is formed between the second grinding head 50 and the first grinding head 10. The second grinding head 50 is detachably fixed to the movable adjustment member 40 so that the second grinding head 50 can be adjusted along with the movable adjustment member 40 to adjust the size of the grinding gap. In other words, by adjusting the position of the movable adjustment member 40 on the base 30, the position of the second grinding head 50 can be adjusted, thereby adjusting the size of the grinding gap. The grinding gap can grind the material to be ground into a fine powder. The specific coarseness of the powder is determined by the size of the grinding gap. The material to be ground here can be coffee beans.

[0077] Reference Figure 1 、 Figure 7 and Figure 8 The adjustment limit member 60 is provided with a limit portion 601 that cooperates with the first blocking portion to limit the position; the adjustment limit member 60 is detachably fixedly connected to the movable adjustment member 40 so that the two can adjust their positions at the same time, thereby driving the limit portion 601 to move closer to or away from the first blocking portion 308. When the limit portion 601 approaches the first blocking portion 308, the grinding gap is reduced; when the limit portion 601 is blocked by the first blocking portion 308, the grinding gap is at its minimum value. In other words, when the grinding gap is increased, the first blocking portion 308 will not block the movement of the limit portion 601. When the grinding gap is adjusted from large to small, the limit portion 601 will continue to approach the first blocking portion 308 until the limit portion 601 contacts the first blocking portion 308. At this time, the limit portion 601 is blocked and cannot continue to move, and the grinding gap reaches its minimum value.

[0078] Based on the above structure, in the grinding device of the present invention, the second grinding head 50 adjusts the grinding gap by moving the movable adjustment member 40 on the base 30. The first blocking portion 308 of the base 30 blocks the limiting portion 601 of the adjustment stop 60, thereby limiting the adjustment range of the movable adjustment member 40 connected to the adjustment stop 60. With this structural arrangement, during factory assembly of the grinding device, after the drive mechanism 20 and the first grinding head 10 are installed, the movable adjustment member 40 can be adjusted to a set minimum grinding gap h. The limiting portion 601 is then abutted against the first blocking portion 308, and the adjustment stop 60 is secured to the movable adjustment member 40. After the connection is complete, the grinding gap of the grinding device can be adjusted to a minimum value h. In other words, during assembly of the grinding device, the minimum grinding gap can be determined by adjusting the position of the adjustment stop 60 and the movable adjustment member 40, without considering the installation error of the drive mechanism 20. This ensures that the minimum grinding gap of each adjusted grinding device is uniform and equal, achieving standardization and improving assembly efficiency. In addition, in the present invention, the first grinding head 10 and the second grinding head 50 are both independently detachable or fixed, which facilitates product cleaning and ensures the cleanliness of the product.

[0079] Specifically, refer to Figure 1 、 Figure 5 and Figure 6 The base 30 has a first threaded hole 301 along the axis of rotation. One end of the movable adjustment member 40 has a first externally threaded section 401 that matches the first threaded hole 301. The position of the movable adjustment member 40 on the base 30 is adjusted through threaded adjustment, thereby driving the second grinding head 50 to adjust the grinding gap. Preferably, the first threaded hole 301 is coaxial with the axis of rotation.

[0080] Reference Figure 7Because the movable adjustment member 40 and the base 30 utilize a threaded fit to achieve position adjustment, the movable adjustment member 40 rotates during adjustment, causing the adjustment limit member 60 to rotate accordingly. In other words, the trajectory of the limiter 601 during movement also rotates. Based on this, the first blocking portion 308 should be located along the arcuate movement trajectory of the limiter 601. Specifically, the end of the base 30 near the grinding gap is provided with a circumferential surface 302 coaxial with the first threaded hole 301. The circumferential surface 302 is provided with an arcuate movable groove 303 for the limiter 601 to follow the movement of the movable adjustment member 40, thereby accommodating the arcuate movement trajectory. The first blocking portion 308 is located at the end of the arcuate movable groove 303 near the grinding gap. When the limiter 601 moves toward the first grinding head 10, the grinding gap is narrowed. When it moves to the end of the arcuate movable groove 303 and is blocked by the first blocking portion 308, the minimum grinding gap is achieved. In the present invention, the limiting portion 601 is specifically a small raised bump, and the first blocking portion 308 is specifically a groove wall at the end of the arc-shaped movable groove 303 .

[0081] A second blocking portion 309 is provided at the other end of the arc-shaped movable groove 303. As the limiting portion 601 approaches the second blocking portion 309, the grinding gap expands, such that the grinding gap reaches its maximum value when the limiting portion 601 is blocked by the second blocking portion 309. In other words, as the limiting portion 601 moves within the arc-shaped movable groove 303, it adjusts the grinding gap: the grinding gap decreases as it approaches the first blocking portion 308, and increases as it approaches the second blocking portion 309. Consequently, the grinding gap adjustment range of the grinding device of the present invention is defined and clearly defined.

[0082] Specifically, refer to Figure 7 and Figure 8 The base 30 includes a cylindrical end 304 having the circumferential surface 302. The adjustable stopper 60 includes a side ring portion 602 that surrounds the circumferential surface 302 and is rotatably connected to the cylindrical end 304, and an end plate portion 603 that is fixedly connected to an end of the side ring portion 602 away from the base 30. The stopper portion 601 is located on the side of the side ring portion 602 opposite the circumferential surface 302. The end plate portion 603 is detachably fixedly connected to the movable adjustment member 40. Specifically, the adjustable stopper 60 is annular and fits over the cylindrical end 304 of the base 30. By rotating the adjustable stopper 60 as a whole, the stopper portion 601 can be moved relative to the first blocking portion 308, thereby driving the movable adjustment member 40 and the second grinding head 50 to adjust the grinding gap.

[0083] In order to realize the detachable connection between the movable adjustment member 40 and the adjustment limit member 60, refer to Figure 7 and Figure 8The grinding device of the present invention also includes a limiting fixing member 70, and the movable adjustment member 40 also includes a limiting flange 402 provided at the end of the first external thread section 401 away from the seat body 30. The limiting fixing member 70 is fixedly connected to the end plate portion 603 and clamps the limiting flange 402 between the limiting fixing member 70 and the end plate portion 603. The clamping and fixing method can ensure that when the position of the movable adjustment member 40 on the base body 30 needs to be adjusted to change the grinding gap at the beginning of assembly, it will not affect the future connection between the movable adjustment member 40 and the adjustment limit member 60, that is, no matter which position the movable adjustment member 40 is rotated to, the adjustment limit member 60 does not need to move with it. When the grinding gap is adjusted to the predetermined minimum gap, the adjustment limit member 60 is rotated until the limiting portion 601 abuts against the first blocking portion 308, and then the limiting fixing member 70 is used to cooperate with the adjusting limit member 60 to clamp and fix the limiting convex edge 402 of the movable adjustment member 40 (the limiting convex edge 402 is a circle, and can be clamped no matter which angle it is rotated to), thereby determining the minimum grinding gap.

[0084] In order to ensure that the movable adjustment member 40 and the adjustment limit member 60 do not rotate relative to each other after clamping and affect the grinding gap, the limit convex edge 402 is circumferentially fixedly connected to the limit fixing member 70. Figure 7 and Figure 8 A first annular tooth 4021 coaxial with the first threaded hole 301 is provided on the surface of the limiting flange 402 facing away from the base 30; a second annular tooth 701 is provided on the surface of the limiting fixture 70 facing the limiting flange 402, which cooperates with the first annular tooth 4021. Specifically, the engagement of the first annular tooth 4021 and the second annular tooth 701 achieves circumferential fixation, preventing relative rotation between the movable adjustment member 40 and the adjustment limit member 60. The use of the first annular tooth 4021 and the second annular tooth 701 for position limiting allows the movable adjustment member 40 and the adjustment limit member 60 to be fixed at any offset angle, thereby ensuring that the position of the movable adjustment member 40 can be freely adjusted during initial assembly. After adjustment, the movable adjustment member 40 can be fixed to the adjustment limit member 60 without having to worry about fixed alignment.

[0085] As a preferred embodiment of the present invention, refer to Figure 3 The seat body 30 is provided with a circle of adjustment scale 305, refer to Figure 7 The adjustment limiter 60 is provided with an indicator mark 604 corresponding to the adjustment scale 305. That is, when adjusting the grinding gap, the user can judge and determine the adjustment amount by referring to the indicator mark 604 and the adjustment scale 305. Preferably, the base 30 is transparent, and the adjustment scale 305 can also be provided on the drive mechanism 20, so that the adjustment scale 305 can be seen through the base 30.

[0086] When the grinding gap is adjusted to the required size, the grinding gap needs to be kept constant during the grinding process to avoid the grinding gap being changed due to the force generated by the grinding, which drives the second grinding head 50 and the movable adjustment member 40 to move, thereby causing the grinding particles to be uneven in size. Based on this, the grinding device of the present invention also includes a locking mechanism 80, referring to Figure 6 and Figure 8 The locking mechanism 80 includes a plurality of positioning grooves 801 provided on one of the seat body 30 and the adjustment limit member 60, and each of the positioning grooves 801 is arranged circumferentially around the axis of the first threaded hole 301; and also includes a push rod 802 that is telescopically inserted into the other of the seat body 30 and the adjustment limit member 60, and the push rod 802 can be telescopically inserted into or out of the positioning groove 801.

[0087] In one embodiment, a push rod 802 is disposed on a base 30, which is provided with a mounting hole 306 for inserting and retracting the push rod 802. Positioning grooves 801 are provided on an adjustment stopper 60. When the grinding gap needs to be adjusted, the push rod 802 is first retracted into the mounting hole 306 so that the push rod 802 is disengaged from the positioning groove 801. At this time, the adjustment stopper 60 can rotate, driving the movable adjustment member 40 and the second grinding head 50 to rotate together. When the grinding gap reaches the required size, the push rod 802 is extended and inserted into the corresponding positioning groove 801. After insertion, the adjustment stopper 60 is fixed relative to the base 30 and cannot continue to rotate, thereby achieving a stable grinding gap that no longer changes. When adjustment is required again, the push rod 802 needs to be disengaged from the positioning groove 801 again.

[0088] In another embodiment, a push rod 802 is disposed on an adjustment stopper 60, which is provided with a mounting hole 306 for inserting and retracting the push rod 802. Positioning grooves 801 are provided on the base 30. When the grinding gap needs to be adjusted, the push rod 802 is first retracted into the mounting hole 306 so that the push rod 802 is disengaged from the positioning groove 801. At this time, the adjustment stopper 60 can rotate, driving the movable adjustment member 40 and the second grinding head 50 to rotate together. When the grinding gap reaches the desired size, the push rod 802 is extended and inserted into the corresponding positioning groove 801. After insertion, the adjustment stopper 60 and the base 30 are relatively fixed and cannot continue to rotate, thereby achieving a stable grinding gap and preventing it from changing. When adjustment is required again, the push rod 802 needs to be disengaged from the positioning groove 801 again.

[0089] Preferably, refer to Figure 6 and Figure 8The locking mechanism 80 further includes an elastic member 803 that pushes the push rod 802 toward the positioning groove 801. The positioning groove 801 is a spherical groove, and one end of the push rod 802 inserted into the positioning groove 801 is a smooth end portion 8021 that matches the spherical groove. The elastic member 803 is specifically located within the aforementioned mounting hole 306 for the push rod 802 to extend and retract. One end of the elastic member 803 abuts against the bottom of the mounting hole 306. The push rod 802 is provided with a raised ring, and the other end of the elastic member 803 abuts against the raised ring, maintaining the tendency to push the push rod 802 outward. The elastic member 803 is a spring fitted onto the push rod 802, or it can be an elastic rubber pad within the mounting hole 306. The arrangement of the rounded end 8021 of the push rod 802 and the spherical groove allows, when the adjustment limiter 60 is subjected to a rotational torque, the spherical groove can more easily overcome the elastic force of the elastic member 803 and press the push rod 802 downward, causing the rounded end 8021 of the push rod 802 to escape from the spherical groove. After escaping from the spherical groove, the adjustment limiter 60 can be rotated to change the grinding gap. When the adjustment limiter 60 rotates to another spherical groove, the push rod 802 is inserted into the spherical groove again under the action of the elastic force of the elastic member 803 to achieve fixation. If the grinding gap does not meet the requirement at this time, the user can continue to rotate to make the push rod 802 escape from the spherical groove again and continue to adjust the grinding gap. Under this design, the user only needs to twist the adjustment limiter 60 to easily adjust the grinding gap. After adjustment, the push rod 802 can automatically fix the adjustment limiter 60 under the action of the elastic member 803, ensuring that the grinding gap will not change again, which is more convenient.

[0090] The following is an explanation of the connection between the second grinding head 50 and the movable adjustment member 40: Figure 7 and Figure 9 The movable adjustment member 40 is provided with a receiving groove 403, and the second grinding head 50 is fixed in the receiving groove 403. Once the second grinding head 50 is fixed in the receiving groove 403, it can move with the movable adjustment member 40 to change the gap between it and the first grinding head 10, thereby changing the grinding gap. Specifically, the movable adjustment member 40 also has a through hole for the output shaft 201 of the drive mechanism 20 to pass through, and the second grinding head 50 also has a through hole for the output shaft 201 to pass through.

[0091] In one embodiment, referring to Figure 9 , a protruding rotation limiting ridge 4031 is provided on the side wall of the accommodating groove 403, and a rotation limiting groove 501 for the protruding ridge to be embedded in the second grinding head 50 is provided;

[0092] The grinding device also includes a threaded stopper 404, which is fixed to the notch of the receiving groove 403 via a threaded connection to clamp the second grinding head 50 in the receiving groove. The second grinding head 50 is circumferentially fixed to the movable adjustment member 40 by the cooperation of the rotational stopper 4031 and the rotational stopper slot 501, so that when the movable adjustment member 40 rotates, the second grinding head 50 rotates with the movable adjustment member 40. The threaded stopper 404 and the bottom of the receiving groove 403 limit the second grinding head 50 and the movable adjustment member 40 along the axis, so that the second grinding head 50 and the movable adjustment member 40 are fixed in the axial direction. Specifically, the inner wall of the receiving groove 403 is provided with an internal thread at the end away from the groove bottom. The threaded stopper 404 is annular and has an external thread on its outer circumference. The internal and external threads cooperate to fix the second grinding head 50 in the receiving groove 403.

[0093] Preferably, refer to Figure 1 、 Figure 2 and Figures 9 to 11 The grinding device of the present invention further includes a cover body 90 that envelops the first grinding head 10 and the second grinding head 50 so as to separate the first grinding head 10 and the second grinding head 50 from the outside world, so as to prevent personal injury during the grinding process. The cover body 90 can be fixedly connected to the base body 30, or fixedly connected to the threaded stopper 404. Preferably, the cover body 90 is fixedly connected to the threaded stopper 404. More preferably, the cover body 90 and the threaded stopper 404 are integrally formed, so that when the second grinding head 50 is clamped, the cover body 90 is also installed.

[0094] Reference Figure 1 、 Figure 2 and Figures 9 to 11 In the present invention, the first grinding head 10 and the second grinding head 50 are both located below the base 30 during grinding. Therefore, the cover 90 is also located below the base 30 to cover the two grinding heads. The cover 90 is provided with a powder outlet 901 at one end away from the base 30, that is, the bottom of the cover 90 has a powder outlet 901. The powder produced after grinding falls under the action of gravity and is eventually discharged from the powder outlet 901. The user can place a cup below the powder outlet 901 to collect the fallen powder. In other words, in addition to its protective function, the cover 90 can also collect powder to prevent it from flying.

[0095] Furthermore, refer to Figure 1 、 Figure 2 and Figures 9 to 11The end of the cover 90 away from the base 30 is provided with a powder guiding slope 902, and the powder outlet 901 is located at the lower end of the powder guiding slope 902. The powder guiding slope 902 is inclined, and when powder falls on the powder guiding slope 902, it will slide down the powder guiding slope 902 and eventually be discharged from the powder outlet 901 below the powder guiding slope 902. In other words, the powder guiding slope 902 further collects the powder, facilitating its discharge and preventing powder from accumulating inside the cover 90 and making it difficult to clean.

[0096] In addition, the grinding device of the present invention further comprises a storage bin 100 for accommodating the grinding raw material. Figure 1 、 Figure 6 、 Figure 8 and Figure 10 The storage bin 100 is mounted on the base 30. During the grinding process, the storage bin 100 is positioned above the grinding gap. The base 30 is provided with a feed channel 307 connecting the storage bin 100 and the grinding gap. The ground material can be coffee beans or other materials to be ground. The ground material is loaded into the storage bin 100. During grinding, the ground material flows into the grinding gap through the feed channel 307 under the action of gravity, without the need for manual feeding.

[0097] Specifically, refer to Figure 1 、 Figure 6 、 Figure 8 and Figure 10 The upper end of the storage bin 100 is a feed port 1001, and the storage bin 100 further includes a bin cover 1002 for closing the feed port 1001 to prevent foreign matter from entering the storage bin 100. In the present invention, the storage bin 100 and the base 30 are fixed together, and preferably the two are connected to form an integral body.

[0098] The first grinding head 10 and the second grinding head 50 are arranged one above the other. The first grinding head 10 can be located above the second grinding head 50 or below the second grinding head 50, depending on the specific forms of the first grinding head 10 and the second grinding head 50. Figure 1 、 Figure 2 、 Figures 9 to 11 Preferably, the first grinding head 10 is a conical grinding toothed disc, the second grinding head 50 is a circular ring-shaped toothed disc matching the conical grinding toothed disc, the output shaft 201 of the driving mechanism 20 passes through the second grinding head 50, and the first grinding head 10 is located at the end of the output shaft 201. During grinding, the first grinding head 10 is located below the second grinding head 50.

[0099] In one embodiment, the driving mechanism 20 is a motor, and the grinding device further includes a control device for controlling the start and stop of the motor, and a power supply unit for supplying power to the motor and the control device. The working state of the motor is controlled by the control device, thereby controlling the start and stop of the grinding. Specifically, the power supply unit includes a battery 203 and a charging interface 2031 for charging the battery 203. The battery 203 can be a rechargeable lithium battery. The provision of the battery 203 makes it convenient to carry the grinding device without having to consider whether there is a power source at the place of use. The battery 203 can be charged through the charging interface 2031. The control device includes a control circuit board 204 and a control switch 205. The control switch 205 can be provided on the outer surface of the storage bin 100. It is configured as a button type, and the user starts or turns off the motor by pressing the button. In addition, an inner shell 209 is provided to cover the driving mechanism 20, the control circuit board 204 and the battery 203 as a whole, and then installed in the storage bin 100. The upper end of the inner shell 209 is a slope to facilitate the sliding of the coffee beans in the storage bin 100.

[0100] The first grinding head 10 and the second grinding head 50 of the present invention are both independently detachable. Since the motor of the present invention is controlled by a button, there is a possibility that the user may be injured by pressing the button to start grinding during the disassembly process. In order to avoid this situation, refer to Figure 4 and Figure 10 The driving mechanism also includes a longitudinally arranged catheter 206, a trigger switch 207 arranged adjacent to the lower end of the catheter 206, and a trigger element 208 movably arranged in the catheter 206; the trigger switch 207 is electrically connected to the control circuit board 204, and is used to control the connection or disconnection of the circuit of the control circuit board 204; when the trigger element 208 is located at one end of the catheter 206 adjacent to the trigger switch 207, the trigger switch 207 is triggered to connect the circuit.

[0101] In the present invention, during grinding, the storage bin 100 is at the top, and the first grinding head 10 and the second grinding head 50 are at the bottom. By setting this trigger switch 207, during normal grinding, the trigger element 208 is located at the lower end of the guide tube 206 (the lower end is adjacent to the trigger switch 207) under the action of gravity. At this time, the trigger element 208 connects the trigger switch 207 to the circuit, and the drive mechanism 20 can rotate normally. When the user disassembles the first grinding head 10 or the second grinding head 50, for ease of disassembly, the entire grinding device is turned over. At this time, the first grinding head 10 and the second grinding head 50 are at the top and the storage bin 100 is at the bottom. Naturally, the guide tube 206 and the trigger switch 207 are also turned over. That is, the trigger switch 207 is at the top, while the trigger element 208 is still at the bottom under the action of gravity. At this time, the trigger switch 207 cannot be triggered, and the circuit is disconnected. Therefore, even if the user accidentally touches the button at this time, the drive mechanism 20 will not be activated, avoiding injury to the user. Specifically, the trigger switch 207 is a Hall switch, and the trigger element 208 is a magnet, specifically a small magnet.

[0102] For other details of the grinding device described in the present invention, please refer to the prior art and will not be described in detail here.

[0103] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A grinding device, characterized in that: include: First grinding head; a driving mechanism having an output shaft detachably connected to the first grinding head, for driving the first grinding head to rotate about a rotation axis; A seat body is fixedly connected to the driving mechanism, and a first blocking portion is provided on the seat body; A movable adjustment member is mounted on the base and can adjust its position along the direction of the rotation axis; a second grinding head, forming a grinding gap with the first grinding head; the second grinding head is detachably fixed to the movable adjustment member, so that the second grinding head can be adjusted along with the movable adjustment member to adjust the size of the grinding gap; an adjustment limiter, comprising a limiter portion that cooperates with the first blocking portion to limit the position; the adjustment limiter portion is detachably fixedly connected to the movable adjustment member so that the positions of the two can be adjusted simultaneously, thereby driving the limiter portion to move closer to or away from the first blocking portion; when the limiter portion approaches the first blocking portion, the grinding gap is reduced; when the limiter portion is blocked by the first blocking portion, the grinding gap is minimized; During factory assembly, after installing the driving mechanism and the first grinding head, first adjust the movable adjustment member to adjust the grinding gap to a set minimum value, then place the limit portion against the first blocking portion and fix the adjustment limit member to the movable adjustment member; The seat body is provided with a first threaded hole along the direction of the rotation axis, and one end of the movable adjustment member is a first external thread segment matching the first threaded hole; The movable adjustment member is provided with an accommodating groove, and the second grinding head is fixed in the accommodating groove.

2. The grinding device according to claim 1, characterized in that: The seat body is provided with a circumferential surface coaxial with the first threaded hole at one end close to the grinding gap, and an arc-shaped movable groove for the limiting part to move is provided on the circumferential surface, and the first blocking part is located at one end of the arc-shaped movable groove close to the grinding gap.

3. The grinding device according to claim 2, characterized in that: A second blocking portion is provided at the other end of the arc-shaped movable groove. When the limiting portion approaches the second blocking portion, the grinding gap expands, so that the grinding gap reaches a maximum value when the limiting portion is blocked by the second blocking portion.

4. The grinding device according to claim 2, characterized in that: The seat body includes a cylindrical end provided with the circumferential surface; The adjustment limit member includes a side ring portion that surrounds the circumferential surface and is rotatably connected to the cylindrical end, and an end plate portion that is fixedly connected to an end of the side ring portion away from the seat body. The limit portion is located on the side of the side ring portion opposite to the circumferential surface; the end plate portion is detachably fixedly connected to the movable adjustment member.

5. The grinding device according to claim 4, characterized in that: Also includes a limit fixing member; The movable adjustment member also includes a limiting convex edge provided at one end of the first external thread section away from the seat body, and the limiting fixing member is fixedly connected to the end plate portion and clamps the limiting convex edge between the limiting fixing member and the end plate portion.

6. The grinding device according to claim 5, characterized in that: The limiting convex edge is circumferentially fixedly connected to the limiting fixing piece.

7. The grinding device according to claim 6, characterized in that: A first annular tooth coaxial with the first threaded hole is provided on a side of the limiting convex edge away from the seat body; a second annular tooth cooperating with the first annular tooth is provided on a side of the limiting fixing piece facing the limiting convex edge.

8. The grinding device according to claim 1, characterized in that: A circle of adjustment scales is arranged on the seat body, and an indication mark corresponding to the adjustment scale is arranged on the adjustment limiter.

9. The grinding device according to claim 1, characterized in that: Also included is a locking mechanism, the locking mechanism comprising: a plurality of positioning grooves provided on one of the seat body and the adjustment limiter, wherein the positioning grooves are arranged circumferentially around the axis of the first threaded hole; A push rod is telescopically inserted into the other of the seat body and the adjustment limit member, and the push rod is telescopic to be inserted into or out of the positioning groove.

10. The grinding device according to claim 9, characterized in that: The locking mechanism also includes an elastic member that pushes the push rod toward the direction of the positioning groove. The positioning groove is a spherical groove. The end of the push rod inserted into the positioning groove is a smooth end portion adapted to the spherical groove.

11. The grinding device according to claim 10, characterized in that: The elastic member is a spring sleeved on the push rod.

12. The grinding device according to claim 1, wherein: A protruding rotation limiting ridge is provided on the side wall of the accommodating groove, and a rotation limiting groove for the limiting ridge to be embedded in the second grinding head is provided; It also includes a threaded limiting piece, which is fixed to the notch of the accommodating groove through a threaded connection to clamp and fix the second grinding head in the accommodating groove.

13. The grinding device according to claim 12, characterized in that: It also includes a cover body that envelops the first grinding head and the second grinding head to separate the first grinding head and the second grinding head from the outside world, and the cover body is fixedly connected to the threaded limiter.

14. The grinding device according to claim 13, characterized in that: The cover body and the threaded limiting member are integrally formed.

15. The grinding device according to claim 13, characterized in that: A powder outlet is provided at one end of the cover body away from the base body.

16. The grinding device according to claim 15, characterized in that: A powder guiding slope is provided at one end of the cover body away from the base body, and the powder outlet is located at the lower end of the powder guiding slope.

17. The grinding device according to claim 1, wherein: It also includes a storage bin for accommodating grinding raw materials, the storage bin is arranged on the base body, and the base body is provided with a feeding channel connecting the storage bin with the grinding gap.

18. The grinding device according to claim 17, characterized in that: The upper end of the storage bin is a feeding port.

19. The grinding device according to claim 18, characterized in that: Also included is a bin cover for closing the feed port.

20. The grinding device according to claim 1, wherein: The first grinding head is a conical grinding toothed disc, and the second grinding head is an annular toothed disc matching the conical grinding toothed disc.

21. The grinding device according to any one of claims 1 to 20, characterized in that: The driving mechanism is a motor, and the grinding device further includes a control device for controlling the start and stop of the motor, and a power supply unit for supplying power to the motor and the control device.

22. The grinding device according to claim 21, characterized in that: The power supply unit includes a battery and a charging interface for charging the battery.

23. The grinding device according to claim 21, characterized in that: The control device includes a control circuit board and a control switch.

24. The grinding device according to claim 23, characterized in that: It also includes a longitudinally arranged catheter, a trigger switch arranged adjacent to the lower end of the catheter, and a trigger element arranged in the catheter so as to be movable up and down; the trigger switch is electrically connected to the control circuit board and is used to control the connection or disconnection of the circuit of the control circuit board; when the trigger element is located at one end of the catheter adjacent to the trigger switch, the trigger switch is triggered to connect the circuit.

25. The grinding device according to claim 24, characterized in that: The trigger switch is a Hall switch, and the trigger element is a magnet.

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