Grinder zero reset mechanism for a bean-to-brew coffee maker

Abstract

This utility model relates to the technical field of coffee grinders and proposes a grinding zeroing mechanism for coffee grinders. By providing a rotation-stopping limiter between the transmission gear and the drive gear, the relative meshing rotation between the two gears is prevented. In this way, when the upper blade is adjusted to zero, the drive gear drives the transmission gear to rotate to the zero position, ensuring that the upper blade moves to the maximum lowering position. Because the lowering position of the upper blade is limited by the limit structure, there is no need to worry about collision between the upper and lower blades. The lower blade can rotate during the adjustment of the upper blade to zero to discharge the coffee powder adhering to the lower blade. In this way, no coffee powder hinders the descent of the upper blade, the upper blade is accurately zeroed, and when the coffee grinder works again, it will not be mixed with the coffee powder from the previous grind, and the coffee powder particles are ground to a uniform size.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinder technology, specifically to a coffee grinder grinding and zeroing mechanism. Background Technology

[0002] A coffee grinder includes an upper and lower blade disc housed within a grinding chamber. The grinding gap between the upper and lower blade discs is adjusted by changing their vertical distance. During adjustment, the upper blade disc moves axially up and down, while the lower blade disc remains stationary. This allows for adjustment of the grinding gap, producing coffee grounds of the desired coarseness. After grinding, to facilitate the next adjustment, the upper blade disc needs to be reset to its maximum lower position, essentially returning to a zero-position. During this zero-position adjustment, the lifting motor activates and drives the lower blade disc... The driving gear meshes with the transmission gear. When the upper blade can no longer descend, the coffee grinder defaults to adjusting the upper blade to the zero position. However, during the grinding process, coffee powder adheres between the upper and lower blades. This powder hinders the upper blade's descent. Since there's no anti-rotation mechanism between the drive and transmission gears to prevent collisions between the upper and lower blades, and the lower blade remains stationary while the upper blade is adjusting to zero, the coffee powder adhering to it cannot be expelled. This results in an inaccurate zero position for the upper blade, preventing the grinder from effectively producing the desired coffee powder coarseness. Furthermore, when the grinder restarts, the previously ground coffee powder will be mixed in, affecting the taste of the brewed coffee.

[0003] Because further improvements are needed. Utility Model Content

[0004] This invention proposes a grinding zeroing mechanism for a coffee grinder. By providing a stop-rotation limiting component between the transmission gear and the drive gear, the relative meshing rotation between the two gears is prevented. In this way, when the upper blade is adjusted to zero, the drive gear drives the transmission gear to rotate to the zero position, ensuring that the upper blade moves to its maximum descent position. Because the upper blade's descent position is limited by the limiting structure, there is no need to worry about collision between the upper and lower blades. The lower blade can rotate during the upper blade's zeroing process to discharge coffee powder adhering to it. Thus, no coffee powder obstructs the descent of the upper blade, ensuring accurate zeroing. When the coffee grinder works again, it will not be mixed with previously ground coffee powder, and the coffee powder particles will be ground to a uniform size.

[0005] A coffee grinder grinding and zeroing mechanism designed for this purpose includes a transmission mechanism that works in conjunction with the drive upper blade to perform axial lifting and lowering motion. The transmission mechanism includes a transmission gear and a drive gear. The transmission gear is connected to the upper cutter head, and the transmission gear has a zero position, while the upper cutter head has a maximum descent position. A stop-rotation limiting component is provided between the drive gear and the transmission gear to prevent relative meshing rotation between the two gears; The drive gear rotates and drives the transmission gear to move along the zero position direction. When the transmission gear rotates to the zero position, it stops rotating through the anti-rotation limiter. The upper cutter head stops moving with the transmission gear and is then in the maximum lowering position, so that the transmission gear and / or the upper cutter head are adjusted to the zero state.

[0006] The anti-rotation limiting component is mounted on the transmission gear, and the anti-rotation limiting component is detachably mounted on the transmission gear; or, the anti-rotation limiting component and the transmission gear are configured as an inseparable whole.

[0007] The anti-rotation limiting component and the transmission gear are provided with an assembly hole for inserting fasteners. The anti-rotation limiting component is installed on the transmission gear by loosening or loosening the fasteners.

[0008] The coffee grinder includes a grinding stand, a lower blade that is rotatably mounted on the grinding stand, an upper blade that is located above the lower blade, and a grinding gap that is formed between the upper blade and the lower blade. The grinding gap between the upper blade and the lower blade can be adjusted by adjusting the axial up-down position of the upper blade on the lower blade. When the upper cutter disc is adjusted to the zero state, the lower cutter disc rotates, and the coffee bean residue adhering to the lower cutter disc falls off under the action of centrifugal force.

[0009] The grinding stand is provided with a lifting fixing seat and a lifting seat. The lifting fixing seat is sleeved on the outside of the lifting seat, and a threaded transmission connection is formed between the lifting fixing seat and the lifting seat. The transmission gear is connected to the upper cutter head via a lifting seat. One end of the lifting seat is connected to the upper cutter head, and the other end of the lifting seat is connected to the transmission gear. During the meshing and rotation between the drive gear and the transmission gear, the transmission gear drives the lifting seat to rotate spirally within the lifting fixed seat, and the lifting seat drives the upper cutter disc to move axially up and down along the lifting fixed seat.

[0010] The grinding stand is equipped with a lifting motor. The motor shaft of the lifting motor is connected to the drive gear. When the lifting motor is started, the drive gear follows the motor shaft of the lifting motor and the transmission gear and the drive gear mesh and rotate.

[0011] The grinding stand is equipped with a rotating shaft that is connected to the lower blade disc. Below the grinding stand is a grinding motor that is connected to the rotating shaft. When the grinding motor is started, it drives the rotating shaft to rotate, and the lower blade disc follows the rotating shaft to rotate.

[0012] The rotating shaft is equipped with a transmission wheel, and the motor shaft of the grinding motor is equipped with a drive wheel. A synchronous belt, chain, or meshing transmission teeth are provided between the transmission wheel and the drive wheel to enable the transmission wheel and the drive wheel to be connected in a transmission manner.

[0013] The grinding stand has a grinding chamber for accommodating and mounting the upper and lower blades. The grinding chamber has a support seat for supporting and positioning the lower blade. The rotating shaft is rotatably connected to the support seat.

[0014] The grinding stand has a material discharge component on one side, and the material discharge component has a material discharge channel that connects to the output end of the grinding chamber.

[0015] The beneficial technical effects of this utility model are as follows: By installing a stop-rotation limiter between the transmission gear and the drive gear to prevent relative meshing rotation between the two gears, when the upper cutter disc is adjusted to zero, the drive gear drives the transmission gear to rotate to the zero position, ensuring that the upper cutter disc moves to its maximum lowering position. Because the lowering position of the upper cutter disc is limited by the limit structure, there is no need to worry about collision between the upper and lower cutter discs. The lower cutter disc can rotate during the adjustment and zeroing process of the upper cutter disc to discharge the coffee powder adhering to the lower cutter disc. In this way, no coffee powder obstructs the descent of the upper cutter disc, the upper cutter disc is accurately zeroed, and when the coffee grinder works again, it will not be mixed with the coffee powder from the previous grind, and the coffee powder particles will be of uniform coarseness.

[0016] There is no need to set up additional zeroing rings or other structures on the coffee grinder. The anti-rotation limiter is set on the transmission gear. The anti-rotation limiter is small in size, easy to process, and does not occupy a large installation space on the coffee grinder. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a three-dimensional structural diagram of the grinding and zeroing mechanism of a coffee grinder according to an embodiment of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the grinding and zeroing mechanism of a coffee grinder according to an embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional structural diagram of the grinding and zeroing mechanism of a coffee grinder according to an embodiment of the present invention.

[0021] Figure 4 This is a three-dimensional structural diagram of an embodiment of the present invention, showing an anti-rotation limiting component that is detachably installed on a transmission gear.

[0022] Figure 5This is a schematic diagram of a three-dimensional structure in which the anti-rotation limiting member and the transmission gear are configured as an inseparable unit according to an embodiment of the present invention. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0024] See Figures 1-5 A coffee grinder grinding and zeroing mechanism includes a transmission mechanism 2 that works in conjunction with the drive upper blade 1 to perform axial lifting and lowering motion. The transmission mechanism 2 includes a transmission gear 3 and a drive gear 4. The transmission gear 3 is connected to the upper cutter head 1. The transmission gear 3 has a zero position, and the upper cutter head 1 has a maximum descent position. A stop-rotation limiting member 5 is provided between the drive gear 4 and the transmission gear 3 to prevent relative meshing rotation between the two gears; The drive gear 4 rotates and drives the transmission gear 3 to move along the zero position direction. The transmission gear 3 rotates to the zero position and stops rotating through the anti-rotation limit member 5. The upper cutter head 1 stops moving with the transmission gear 3 and is then in the maximum descending position, so that the transmission gear 3 and / or the upper cutter head 1 are adjusted to the zero state.

[0025] In this embodiment, when one end face of the anti-rotation limiting member 5 contacts the drive gear 4, the transmission gear 3 is at the zero point position and the upper cutter head 1 is at the maximum descending position. When the other end face of the anti-rotation limiting member 5 contacts the drive gear 4, the transmission gear 3 is at the maximum stroke position and the upper cutter head 1 is at the maximum rising position.

[0026] By providing a stop-rotation limiter 5 between the transmission gear 3 and the drive gear 4 to prevent relative meshing rotation between the two gears, when the upper cutter disc 1 is adjusted to zero, and the drive gear 4 drives the transmission gear 3 to rotate to the zero position, it is ensured that the upper cutter disc 1 moves to the maximum downward position and no longer continues to move downward.

[0027] The anti-rotation limiting member 5 is disposed on the transmission gear 3, and the anti-rotation limiting member 5 is detachably installed on the transmission gear 3; or, the anti-rotation limiting member 5 and the transmission gear 3 are configured as an inseparable whole.

[0028] The anti-rotation limiting member 5 and the transmission gear 3 are provided with an assembly hole 6 for inserting fasteners. The anti-rotation limiting member 5 is installed on the transmission gear 3 by loosening or removing the fasteners.

[0029] In this embodiment, when the anti-rotation limiting member 5 and the transmission gear 3 are separately arranged, the anti-rotation limiting member 5 is provided with fixed teeth that mesh with the transmission gear 3, and the fastener is a screw. The anti-rotation limiting member 5 is fixed to the transmission gear 3 by the screw. Since the transmission gear 3 is a large gear and the drive gear 4 is a small gear, the rotation speed of the transmission gear 3 is slow during the adjustment and zeroing process of the upper cutter head 1. In this way, the anti-rotation limiting member 5 made of metal material will not have a large and violent collision with the drive gear 4. When the transmission gear 3 rotates to the zero position, the anti-rotation limiting member 5 of the transmission gear 3 contacts the drive gear 4, the drive gear 4 cannot rotate, and the transmission gear 3 stops moving accordingly.

[0030] In this embodiment, when the anti-rotation limiting member 5 and the transmission gear 3 are set as a whole, the part of the transmission gear 3 corresponding to the anti-rotation limiting member 5 is not provided with meshing teeth that mesh with the drive gear 4. In this way, when the transmission gear 3 rotates to the zero position, the transmission gear 3 is not meshed with the drive gear 4, and the transmission gear 3 cannot continue to rotate.

[0031] The coffee grinder includes a grinder stand 7, a lower blade 8 rotatably mounted on the grinder stand 7, an upper blade 1 located above the lower blade 8, and a grinding gap formed between the upper blade 1 and the lower blade 8. The grinding gap between the upper blade 1 and the lower blade 8 can be adjusted by adjusting the axial up and down position of the upper blade 1 on the lower blade 8. When the upper cutter disc 1 is adjusted to the zero state, the lower cutter disc 8 rotates, and the coffee bean residue adhering to the lower cutter disc 8 falls off under the action of centrifugal force.

[0032] In this embodiment, since the upper blade 1 has a limiting structure for its descent position, there is no need to worry about collisions between the upper blade 1 and the lower blade 8. The lower blade 8 can rotate during the adjustment and zeroing process of the upper blade 1 to discharge the coffee powder adhering to the lower blade 8. In this way, there is no coffee powder to obstruct the descent of the upper blade 1, the upper blade 1 is accurately zeroed, and when the coffee grinder works again, it will not be mixed with the coffee powder from the previous grinding, and the coffee powder particles are uniformly fine.

[0033] The grinding support 7 is provided with a lifting fixing seat 9 and a lifting seat 10. The lifting fixing seat 9 is sleeved on the outside of the lifting seat 10, and a threaded transmission connection is formed between the lifting fixing seat 9 and the lifting seat 10. The transmission gear 3 is connected to the upper cutter head 1 via the lifting seat 10. One end of the lifting seat 10 is connected to the upper cutter head 1, and the other end of the lifting seat 10 is connected to the transmission gear 3. During the meshing and rotation between the drive gear 4 and the transmission gear 3, the transmission gear 3 drives the lifting seat 10 to rotate spirally within the lifting fixed seat 9, and the lifting seat 10 drives the upper cutter disc 1 to move axially up and down along the lifting fixed seat 9.

[0034] In this embodiment, the transmission gear 3, the lifting seat 10 and the upper cutter disc 1 are fixedly connected to each other by bolts, and the transmission gear 3, the lifting seat 10 and the upper cutter disc 1 are all provided with threaded cavities for inserting bolts.

[0035] The grinding stand 7 is equipped with a lifting motor 11. The motor shaft of the lifting motor 11 is connected to the drive gear 4. When the lifting motor 11 is started, the drive gear 4 follows the motor shaft of the lifting motor 11 to rotate, and the transmission gear 3 and the drive gear 4 mesh and rotate.

[0036] The grinding stand 7 is provided with a rotating shaft 12 that is connected to the lower blade 8. A grinding motor 13 that is connected to the rotating shaft 12 is located below the grinding stand 7. The grinding motor 13 starts and drives the rotating shaft 12 to rotate, and the lower blade 8 follows the rotating shaft 12 to rotate.

[0037] The rotating shaft 12 is provided with a transmission wheel 15, and the motor shaft of the grinding motor 13 is provided with a drive wheel 16. A synchronous belt, chain or meshing transmission teeth are provided between the transmission wheel 15 and the drive wheel 16 so that the transmission wheel 15 and the drive wheel 16 are connected for transmission.

[0038] In this embodiment, the transmission wheel 15 and the drive wheel 16 can be driven by meshing transmission teeth; or, the transmission wheel 15 and the drive wheel 16 can be configured as sprockets, and the transmission wheel 15 and the drive wheel 16 can be connected by chain drive; or, the transmission wheel 15 and the drive wheel 16 can be configured as synchronous belt pulleys, and the transmission wheel 15 and the drive wheel 16 can be connected by belt drive.

[0039] The grinding stand 7 is provided with a grinding chamber 14 for accommodating and installing the upper blade 1 and the lower blade 8. The grinding chamber 14 is provided with a support seat 17 for supporting and positioning the lower blade 8. The rotating shaft 12 is rotatably connected to the support seat 17.

[0040] In this embodiment, the support 17 is provided with a shaft cavity for inserting the rotating shaft 12.

[0041] The coffee grinder support 7 has a feeding component 18 on one side, and the feeding component 18 has a feeding channel 19 that connects to the output end of the grinding chamber 14. The coffee powder in the grinding chamber 14 can be discharged from the coffee grinder through the feeding channel 19.

[0042] In this embodiment, the feeder 18 can be fixed to the grinder bracket 7 by a snap fastener or screw. The grinder bracket 7 is provided with snap fastener holes for fixing the feeder 18 or connecting blocks that engage with screws.

[0043] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

[0044] In the above description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0046] In the foregoing description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to fixed connections using screws, rivets, or welding; detachable connections; or connections formed by metal processing (die casting, deep drawing, lathe machining, etc.) or injection molding; they can also be mechanical or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] In the above description of this application, unless otherwise expressly specified and limited, the use of terms such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

Claims

1. A coffee grinder's zeroing mechanism, comprising a transmission mechanism (2) that works in conjunction with driving the upper blade (1) to perform axial lifting and lowering motion, characterized in that: The transmission mechanism (2) includes a transmission gear (3) and a drive gear (4). The transmission gear (3) is connected to the upper cutter head (1) in a transmission connection; A stop-rotation limiting member (5) is provided between the drive gear (4) and the transmission gear (3) to prevent relative meshing rotation between the two gears. The drive gear (4) rotates and drives the transmission gear (3) to move along the zero position direction. The transmission gear (3) rotates to the zero position and stops rotating through the anti-rotation limit piece (5). The upper cutter head (1) stops moving with the transmission gear (3) and is then in the maximum descending position, so that the transmission gear (3) and / or the upper cutter head (1) are adjusted to the zero state.

2. The coffee grinder zeroing mechanism according to claim 1, characterized in that: The anti-rotation limiting member (5) is set on the transmission gear (3), and the anti-rotation limiting member (5) is detachably installed on the transmission gear (3); or, the anti-rotation limiting member (5) and the transmission gear (3) are set as an inseparable whole.

3. The coffee grinder zeroing mechanism according to claim 1, characterized in that: The anti-rotation limiting member (5) and the transmission gear (3) are provided with an assembly hole (6) for inserting fasteners. The anti-rotation limiting member (5) is installed on the transmission gear (3) by loosening and unloosening the fasteners.

4. The coffee grinder zeroing mechanism according to claim 1, characterized in that: The coffee grinder includes a grinding stand (7), a lower blade (8) rotatably mounted on the grinding stand (7), an upper blade (1) located above the lower blade (8), and a grinding gap formed between the upper blade (1) and the lower blade (8). The grinding gap between the upper blade (1) and the lower blade (8) can be adjusted by adjusting the axial up-down position of the upper blade (1) on the lower blade (8). When the upper cutter disc (1) is adjusted to the zero state, the lower cutter disc (8) rotates, and the coffee bean residue adhering to the lower cutter disc (8) falls off under the action of centrifugal force.

5. The coffee grinder zeroing mechanism according to claim 4, characterized in that: The grinding stand (7) is provided with a lifting fixing seat (9) and a lifting seat (10). The lifting fixing seat (9) is sleeved on the outside of the lifting seat (10), and a threaded transmission connection is formed between the lifting fixing seat (9) and the lifting seat (10). The transmission gear (3) is connected to the upper cutter head (1) via the lifting seat (10). One end of the lifting seat (10) is connected to the upper cutter head (1), and the other end of the lifting seat (10) is connected to the transmission gear (3). During the meshing and rotation between the drive gear (4) and the transmission gear (3), the transmission gear (3) drives the lifting seat (10) to rotate spirally within the lifting fixed seat (9), and the lifting seat (10) drives the upper cutter disc (1) to move axially up and down along the lifting fixed seat (9).

6. The coffee grinder zeroing mechanism according to claim 4, characterized in that: The grinding stand (7) is equipped with a lifting motor (11). The motor shaft of the lifting motor (11) is connected to the drive gear (4). When the lifting motor (11) is started, the drive gear (4) follows the motor shaft of the lifting motor (11) and the transmission gear (3) and the drive gear (4) mesh and rotate.

7. The coffee grinder zeroing mechanism according to claim 4, characterized in that: The grinding stand (7) is provided with a rotating shaft (12) that is connected to the lower blade (8) for transmission. Below the grinding stand (7) is a grinding motor (13) that is connected to the rotating shaft (12) for transmission. The grinding motor (13) starts and drives the rotating shaft (12) to rotate, and the lower blade (8) follows the rotating shaft (12) to rotate.

8. The coffee grinder zeroing mechanism according to claim 7, characterized in that: The rotating shaft (12) is provided with a transmission wheel (15), and the motor shaft of the grinding motor (13) is provided with a drive wheel (16). A synchronous belt, chain or meshing transmission teeth are provided between the transmission wheel (15) and the drive wheel (16) so that the transmission wheel (15) and the drive wheel (16) are connected in transmission.

9. The coffee grinder zeroing mechanism according to claim 7, characterized in that: The grinding stand (7) is provided with a grinding chamber (14) for accommodating the upper blade (1) and the lower blade (8). The grinding chamber (14) is provided with a support seat (17) for supporting and positioning the lower blade (8). The rotating shaft (12) is rotatably connected to the support seat (17).

10. The coffee grinder zeroing mechanism according to claim 9, characterized in that: The grinding stand (7) has a material discharge component (18) on one side, and the material discharge component (18) has a material discharge channel (19) that connects to the output end of the grinding chamber (14).

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