Grinding and screening mechanism and coffee bean grinder

Abstract

The present disclosure provides a grinding and screening mechanism and a coffee bean grinder. A grinding center is provided in the grinding chamber of the grinding body of the above-mentioned grinding and screening mechanism; a transmission center shaft is rotatably arranged in the grinding body, and a transmission end of the transmission center shaft is connected to the grinding center; a powder collecting cup is arranged at the powder outlet end of the grinding body; a powder screening assembly includes a powder screening partition plate and a linkage shaft; the powder screening partition plate and the linkage shaft are both arranged in the cup chamber of the powder collecting cup; the cup chamber of the powder collecting cup is divided into a coarse powder upper chamber and a fine powder lower chamber which are connected, and the coarse powder upper chamber is close to and connected to the cup mouth of the powder collecting cup; the powder screening partition plate is rotatably arranged between the coarse powder upper chamber and the fine powder lower chamber, and is connected to the end of the transmission end of the transmission center shaft through a linkage shaft; the powder screening partition plate is provided with a plurality of sieve holes, and the coarse powder upper chamber is connected to the fine powder lower chamber through each sieve hole. The above-mentioned grinding and screening mechanism realizes the screening of coffee powder synchronously while grinding, without the need for additional operations, which ultimately makes the use process more convenient and quick.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee bean grinding, and in particular to a grinding and screening mechanism and a coffee bean grinder. Background Art

[0002] After the coffee beans are ground, the ground coffee powder may be uneven in coarseness and fineness. If the coffee beans are ground too finely, the coffee powder will be over-extracted during the subsequent brewing process, which will cause the coffee to taste bitter. In response to this, some manufacturers have made further research and development.

[0003] For example, Chinese patent document CN217365513U discloses a coffee bean grinder with a rotating powder springing screen structure, including a rotating powder springing screen structure; the rotating powder springing screen structure includes a powder sieving bin provided with a screen, a powder sieving assembly is provided on one side of the powder sieving bin, and a powder springing assembly is provided on the opposite side; the powder sieving assembly includes powder sieving buttons, all of which are placed in a first groove of the powder sieving bin, the powder sieving buttons are fixedly connected to a crankshaft, a crankshaft reset spring is sleeved on the crankshaft, and the crankshaft drives the powder sieving transmission shaft to rotate through a connecting ring, thereby driving the screen to rotate; the powder springing assembly includes a powder springing button transversely fixed in the second groove of the powder sieving bin, a powder springing head is longitudinally provided on one side of the powder springing button close to the screen, and a powder springing head reset spring is longitudinally provided on the opposite side.

[0004] However, the design of the above-mentioned coffee bean grinder with a rotating powder spring screen structure has the following problems:

[0005] The above-mentioned coffee bean grinder with a rotating powder springing screen structure can screen the coffee powder by manually switching and pressing the powder springing button and the powder sieving button so that the crankshaft repeatedly hits the screen driven by the crankshaft return spring. However, the above-mentioned powder springing process requires manual repeated pressing of the powder springing button and the powder sieving button, which not only has low operating efficiency but also is complicated to operate. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a grinding and sieving mechanism and a coffee bean grinder that are simple and convenient to operate and have good sieving effect.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A powder grinding and screening mechanism, comprising:

[0009] A grinding body, wherein a grinding center is arranged in a grinding cavity of the grinding body;

[0010] A transmission shaft, the transmission shaft is rotatably disposed in the grinding body, and a transmission end of the transmission shaft is connected to the grinding core; the transmission shaft rotates with the grinding core in the grinding chamber of the grinding body, so that the grinding core grinds the coffee beans;

[0011] A powder collecting cup, which is arranged at the powder outlet end of the grinding body, and the cup mouth of the powder collecting cup is connected to the grinding chamber of the grinding body;

[0012] The grinding and powder screening mechanism also includes a powder screening component;

[0013] The powder screening component includes a powder screening partition plate and a linkage shaft; the powder screening partition plate and the linkage shaft are both arranged in the cup cavity of the powder collecting cup; the cup cavity of the powder collecting cup is divided into a coarse powder upper cavity and a fine powder lower cavity which are connected, and the coarse powder upper cavity is close to and connected to the cup mouth of the powder collecting cup; the powder screening partition plate is rotatably arranged between the coarse powder upper cavity and the fine powder lower cavity, and is connected to the end of the transmission end of the transmission middle shaft through the linkage shaft; the powder screening partition plate is provided with a plurality of sieve holes, and the coarse powder upper cavity is connected to the fine powder lower cavity through each of the sieve holes.

[0014] In one embodiment, the linkage shaft includes a connecting rod and a rotating seat; the end of the transmission end of the transmission center shaft is connected to the rotating seat through the connecting rod; the rotating seat is arranged in the fine powder lower chamber and is rotatably connected to the bottom of the powder collecting cup; the powder screening disc is rotatably clamped on the rotating seat.

[0015] In one embodiment, the rotating seat includes an embedded portion, a platform portion and a rotating portion which are connected in sequence; the embedded portion is embedded in the connecting rod; a rotating hole is provided at the bottom of the powder collecting cup; the rotating portion is arranged in the rotating hole and is rotatably connected to the hole wall of the rotating hole; the powder screening disc is provided with a rotating opening, a top block is convexly provided on the surface of the platform portion, the rotating opening is sleeved on the embedded portion, and the peripheral edge of the rotating opening is slidably supported on the top block through the sieve hole, so that the powder screening disc is tilted and rotated on the platform portion.

[0016] In one of the embodiments, the inclination angle of the powder screening disc is in the range of 3°-4°.

[0017] In one embodiment, the powder collecting cup includes a coarse powder cup and a fine powder cup, the coarse powder upper chamber is the cup chamber of the coarse powder cup, the fine powder lower chamber is the cup chamber of the fine powder cup, the cup mouth of the powder collecting cup is opened at the top end of the coarse powder cup, the fine powder cup is detachably connected to the bottom periphery of the coarse powder cup, and the cup mouth of the fine powder cup is connected to the bottom end of the coarse powder cup; the powder screening partition is arranged at the cup mouth position of the fine powder cup to separate the coarse powder upper chamber and the fine powder lower chamber; the rotating seat is rotatably connected to the cup bottom of the fine powder cup, and is detachably clamped to the connecting rod.

[0018] In one of the embodiments, a transmission slot is provided at the end of the connecting rod, and a locking portion is convexly provided on the rotating seat; the locking portion is arranged in the transmission slot; the locking portion is locked to the slot wall of the transmission slot and is magnetically connected to the slot bottom of the transmission slot.

[0019] In one of the embodiments, a powder-pumping piece is disposed on the linkage shaft, and the powder-pumping piece rotates in the coarse powder upper cavity.

[0020] In one embodiment, the powder separation plate is arranged close to the powder screening disk; or,

[0021] The powder removing piece is arranged close to the cup opening of the powder collecting cup.

[0022] In one embodiment, the powder screening disc has a mesh size of 300 to 1000.

[0023] A coffee bean grinder comprises the grinding and screening mechanism of any one of the above embodiments.

[0024] Compared with the prior art, the present invention has at least the following advantages:

[0025] The above-mentioned grinding and powder screening mechanism, because the coarse powder upper chamber is close to and connected to the cup mouth of the powder collecting cup, the cup mouth of the powder collecting cup is connected to the grinding chamber of the grinding body, and the powder screening partition is arranged between the coarse powder upper chamber and the fine powder lower chamber, so that the coffee powder in the grinding chamber can enter the coarse powder upper chamber, and the coffee powder will accumulate on the powder screening partition under the action of gravity. In addition, because the transmission end of the transmission center shaft is connected to the grinding core, the powder screening partition is connected to the end of the transmission end of the transmission center shaft through the linkage shaft, and the coarse powder upper chamber is connected to the fine powder lower chamber through each sieve hole, so that the powder screening partition can rotate synchronously when the grinding core rotates, so that when the grinding core is grinding coffee beans, the coffee powder is synchronously stirred in the coarse powder upper chamber during the rotation of the powder screening partition, and finally the finer part of the coffee powder can be screened into the fine powder lower chamber through the sieve hole. Compared with the coffee bean grinder with a rotating powder spring screen structure in the prior art, the above-mentioned grinding and powder screening mechanism can simultaneously drive the powder screening disc and the grinding center on the transmission center axis to achieve synchronous screening of coffee powder during grinding without the need for additional operations, ultimately making the use process more convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1An exploded view of a grinding and screening mechanism according to an embodiment of the present disclosure;

[0028] Figure 2 for Figure 1 A cross-sectional view of the grinding and screening mechanism shown;

[0029] Figure 3 for Figure 2 A partial enlarged view shown in the middle A;

[0030] Figure 4 An exploded view of a coffee bean grinder according to another embodiment of the present disclosure;

[0031] Figure 5 for Figure 4 A cross-sectional view of a coffee bean grinder is shown.

[0032] Reference numerals: 10, coffee bean grinder; 100, grinding and screening mechanism; 110, grinding body; 1110, grinding chamber; 120, grinding core; 130, transmission center shaft; 1310, powder disc; 1311, sleeve ring; 1312, stirring slurry; 1320, upper powder disc; 1330, lower powder disc; 140, powder collecting cup; 1410, coarse powder cup; 1411, coarse powder upper chamber; 1420, fine powder cup; 1421, fine powder lower chamber; 1422, rotating hole; 142a, connecting chamber; 1 42b, rotating chamber; 142c, bearing; 142d, pin sleeve; 142e, screw; 1423, anti-skid texture; 150, powder screening assembly; 1510, powder screening disk; 1511, sieve hole; 1512, turntable; 1520, linkage shaft; 1521, connecting rod; 152a, transmission slot; 152b, second magnetic element; 1522, rotating seat; 152c, embedding part; 152d, first magnetic element; 152e, platform part; 152f, top block; 152g, rotating part. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0037] like Figure 1 and Figure 2 As shown, a grinding and screening mechanism 100 of an embodiment includes a grinding body 110, a transmission shaft 130, a powder collecting cup 140 and a powder screening assembly 150; a grinding core 120 is provided in a grinding chamber 1110 of the grinding body 110; the transmission shaft 130 is rotatably arranged in the grinding body 110, and the transmission end of the transmission shaft 130 is connected to the grinding core 120; the transmission shaft 130 rotates in the grinding chamber 1110 of the grinding body 110 with the grinding core 120, so that the grinding core 120 grinds coffee beans; the powder collecting cup 140 is arranged at the powder outlet end of the grinding body 110, and the cup mouth of the powder collecting cup 140 is connected to the grinding chamber 1110 of the grinding body 110; the powder screening assembly 150 It includes a powder screening disc 1510 and a linkage shaft 1520; the powder screening disc 1510 and the linkage shaft 1520 are both arranged in the cup cavity of the powder collecting cup 140; the cup cavity of the powder collecting cup 140 is divided into a coarse powder upper cavity 1411 and a fine powder lower cavity 1421 which are connected, and the coarse powder upper cavity 1411 is close to and connected to the cup mouth of the powder collecting cup 140; the powder screening disc 1510 is rotatably arranged between the coarse powder upper cavity 1411 and the fine powder lower cavity 1421, and is connected to the end of the transmission end of the transmission middle shaft 130 through the linkage shaft 1520; the powder screening disc 1510 is provided with a plurality of sieve holes 1511, and the coarse powder upper cavity 1411 is connected to the fine powder lower cavity 1421 through each sieve hole 1511.

[0038] It can be understood that because the coarse powder upper chamber 1411 is close to and connected to the cup mouth of the powder collecting cup 140, the cup mouth of the powder collecting cup 140 is connected to the grinding chamber 1110 of the grinding body 110, and the powder screening disk 1510 is arranged between the coarse powder upper chamber 1411 and the fine powder lower chamber 1421, the coffee powder in the grinding chamber 1110 can enter the coarse powder upper chamber 1411, and the coffee powder will accumulate on the powder screening disk 1510 under the action of gravity. Because the transmission end of the transmission central shaft 130 is connected to the grinding core 120, the powder screening disc 1510 is connected to the end of the transmission end of the transmission central shaft 130 through the linkage shaft 1520, and the coarse powder upper chamber 1411 is connected to the fine powder lower chamber 1421 through each sieve hole 1511, so that the powder screening disc 1510 can rotate synchronously when the grinding core 120 rotates, so that when the grinding core 120 grinds coffee beans, the coffee powder is synchronously stirred in the coarse powder upper chamber 1411 during the rotation of the powder screening disc 1510, and finally the finer part of the coffee powder can be sieved into the fine powder lower chamber 1421 through the sieve hole 1511. Compared with the coffee bean grinder with a rotating powder spring screen structure in the prior art, the above-mentioned grinding and powder screening mechanism 100 can simultaneously drive the powder screening disk 1510 and the grinding core 120 on the transmission central shaft 130 to achieve synchronous screening of coffee powder during grinding without the need for additional operations, ultimately making the use process more convenient and quick.

[0039] Combination Figure 2 As shown, in one embodiment, the linkage shaft 1520 includes a connecting rod 1521 and a rotating seat 1522; the end of the transmission end of the transmission middle shaft 130 is connected to the rotating seat 1522 through the connecting rod 1521; the rotating seat 1522 is arranged in the fine powder lower cavity 1421 and is rotatably connected to the bottom of the powder collecting cup 140; the powder screening disc 1510 is rotatably clamped on the rotating seat 1522. It can be understood that because the end of the transmission end of the transmission shaft 130 is connected to the rotating seat 1522 through the connecting rod 1521, and the rotating seat 1522 is connected to the bottom of the powder collecting cup 140, the power of the transmission shaft 130 can be transmitted to the rotating seat 1522 through the connecting rod 1521, and the rotating seat 1522 is rotatably connected to the bottom of the powder collecting cup 140, so that the transmission shaft 130 can drive the rotating seat 1522 to rotate in the fine powder lower chamber 1421, and because the powder screening partition 1510 is rotatably clamped on the rotating seat 1522, the rotating seat 1522 can play a certain supporting role on the powder screening partition 1510, not only allowing the powder screening partition 1510 to carry more coffee powder, but also ensuring that there is always enough gap between the powder screening partition 1510 and the bottom of the powder collecting cup 140 to sieve out the fine coffee powder. At the same time, the powder screening disc 1510 can rotate along with the rotation of the rotating seat 1522, and then realize linkage with the transmission center shaft 130, so that the structure is simple and the transmission efficiency is higher.

[0040] Combination Figure 3As shown, in this embodiment, the rotating seat 1522 includes a locking portion 152c, a platform portion 152e and a rotating portion 152g that are connected in sequence; the locking portion 152c is locked to the connecting rod 1521; a rotating hole 1422 is provided at the bottom of the powder collecting cup 140; the rotating portion 152g is arranged in the rotating hole 1422 and is rotatably connected to the hole wall of the rotating hole 1422; a rotating opening 1512 is provided on the powder screening partition 1510, and a top block 152f is convexly provided on the surface of the platform portion 152e, and the rotating opening 1512 is sleeved on the locking portion 152c, and the peripheral edge of the rotating opening 1512 is slidably held against the top block 152f through the sieve hole 1511, so that the powder screening partition 1510 is tilted and rotated on the platform portion 152e. It can be understood that because the embedded portion 152c is embedded in the connecting rod 1521, transmission can be carried out between the connecting rod 1521 and the rotating seat 1522, and by setting the rotating portion 152g in the rotating hole 1422, the rotating seat 1522 can rotate around the axial direction of the rotating hole 1422, and the powder screening disc 1510 is sleeved on the embedded portion 152c through the rotating mouth 1512, and the top block 152f of the abutment portion 152e is supported on the periphery of the rotating mouth 1512 of the powder screening disc 1510, so that the powder screening disc 1510 is obliquely placed on the abutment portion 152e. Because the top block 152f slides against the sieve hole 1511, damping is generated between the powder screening disc 1510 and the top block 152f. When the abutment portion 152e rotates, the abutment portion 152e can drive the powder screening disc 1510 to rotate through the friction of the top block 152f. At the same time, when coffee powder falls and accumulates on the powder screening disc 1510, the powder screening disc 1510 is subjected to the gravity of the coffee powder and slides relative to the top block 152f, so that the top block 152f can be moved from the first position of the periphery of the turning port 1512 of the powder screening disc 1510. Slide to the second position, and lift up the different positions of the periphery of the turning mouth 1512 of the powder sieving disk 1510 through the top block 152f, so as to change the inclination direction of the powder sieving disk 1510, so that the powder sieving disk 1510 can be tilted and swung in the vertical direction while rotating around the embedded part 152c, so that the coffee powder on the powder sieving disk 1510 can be tossed in the vertical direction, and the coffee powder is tossed and turned, and finally the finer part of the coffee powder can pass through the sieve hole 1511 and fall into the fine powder lower chamber 1421, thereby accelerating the screening process of the coffee powder.

[0041] Furthermore, the inclination angle a of the powder screening disc 1510 is in the range of 3°-4°. It can be understood that the powder screening disc 1510 is lifted up by the top block 152f, so that the powder screening disc 1510 is inclined at an angle of 3°-4°, which can not only prevent the powder screening disc 1510 from being too inclined, making it difficult for the powder screening disc 1510 to carry the coffee powder in the vertical direction, but also prevent the powder screening disc 1510 from being too inclination, making it difficult to achieve the effect of tossing the coffee powder. Specifically, the inclination angle a of the powder screening disc 1510 can be 3°, 3.5° or 4°. Of course, the specific inclination angle of the powder screening disc 1510 is not limited, and those skilled in the art can also adjust it according to the tossing of the coffee powder.

[0042] Combination Figure 3 As shown, specifically, the rotating hole 1422 includes a connecting cavity 142a and a rotating cavity 142b that are connected to each other. A pin sleeve 142d is rotatably clamped in the rotating cavity 142b, and a screw 142e is arranged in the pin sleeve 142d; the rotating portion 152g is arranged in the connecting cavity 142a and connected to the cavity wall of the connecting cavity 142a through a bearing 142c; the screw 142e is screwed and locked with the end of the rotating portion 152g. It can be understood that because the screw 142e is screwed and locked with the end of the rotating portion 152g, the rotating portion 152g can be firmly arranged in the connecting cavity 142a and is not easy to fall out. At the same time, the pin sleeve 142d is rotatably clamped in the rotating cavity 142b, and the rotating part 152g is connected to the cavity wall of the connecting cavity 142a through the bearing 142c. When the rotating seat 1522 rotates, the rotating part 152g can rotate in the connecting cavity 142a, and the pin sleeve 142d can rotate in the rotating cavity 142b, so that the rotating seat 1522 can rotate smoothly in the rotating hole 1422.

[0043] Combination Figure 2 and Figure 3As shown, in one embodiment, the powder collecting cup 140 includes a coarse powder cup 1410 and a fine powder cup 1420, the coarse powder upper chamber 1411 is the cup chamber of the coarse powder cup 1410, and the fine powder lower chamber 1421 is the cup chamber of the fine powder cup 1420, the cup mouth of the powder collecting cup 140 is opened at the top part of the coarse powder cup 1410, the fine powder cup 1420 is detachably connected to the bottom end periphery of the coarse powder cup 1410, and the cup mouth of the fine powder cup 1420 is connected to the bottom end part of the coarse powder cup 1410; the powder screening disk 1510 is arranged at the cup mouth position of the fine powder cup 1420 to separate the coarse powder upper chamber 1411 and the fine powder lower chamber 1421; the rotating seat 1522 is rotatably connected to the cup bottom of the fine powder cup 1420, and is detachably clamped to the connecting rod 1521. It can be understood that, because the mouth of the powder collecting cup 140 is opened at the top of the coarse powder cup 1410, the coarse powder upper chamber 1411 is the cup chamber of the coarse powder cup 1410, so that the coffee powder can enter the coarse powder upper chamber 1411 through the mouth of the powder collecting cup 140. In addition, because the fine powder cup 1420 is detachably connected to the bottom periphery of the coarse powder cup 1410, the mouth of the fine powder cup 1420 is connected to the bottom end of the coarse powder cup 1410, the powder screening disc 1510 is arranged at the mouth of the fine powder cup 1420, and the fine powder lower chamber 1421 is the cup chamber of the fine powder cup 1420, so that the finer part of the coffee powder can be screened through the sieve holes 1511 of the powder screening disc 1510 and enter the fine powder lower chamber 1421. At the same time, because the rotating seat 1522 is rotatably connected to the bottom of the fine powder cup 1420 and can be detachably connected to the connecting rod 1521, the connecting rod 1521 can be connected to drive the rotating seat 1522 to rotate at the bottom of the fine powder cup 1420, and when enough fine coffee powder is accumulated in the fine powder lower chamber 1421, the user can directly remove the fine powder cup 1420 from the bottom end of the coarse powder cup 1410, and pour the fine coffee powder out of the fine powder cup 1420, so as to clean up the fine coffee powder in the fine powder cup 1420 in time.

[0044] Combination Figure 1 and Figure 3As shown, in this embodiment, a transmission slot 152a is provided at the end of the connecting rod 1521, and a locking portion 152c is convexly provided on the rotating seat 1522; the locking portion 152c is arranged in the transmission slot 152a; the locking portion 152c is locked to the slot wall of the transmission slot 152a, and is magnetically connected to the slot bottom of the transmission slot 152a. It can be understood that by making the locking portion 152c locked to the slot wall of the transmission slot 152a, the connecting rod 1521 can efficiently transmit the rotating seat 1522, and at the same time, the locking portion 152c is connected to the slot bottom of the transmission slot 152a by magnetic attraction, so that the locking portion 152c can form a magnetic attraction force with the slot bottom of the transmission slot 152a in the axial direction, which can prevent the locking portion 152c from accidentally falling out of the transmission slot 152a, and make it more convenient to disassemble and assemble the rotating seat 1522 and the fine powder cup 1420. Specifically, a first magnetic member 152d is embedded in the end of the embedded portion 152c, and a second magnetic member 152b is embedded in the bottom of the transmission slot 152a. The magnetic attraction between the first magnetic member 152d and the second magnetic member 152b enables the embedded portion 152c to be securely embedded in the transmission slot 152a. The transmission slot 152a may be a hexagonal slot, and the embedded portion 152c is snap-fitted to the hexagonal slot. It can be understood that the hexagonal slot has more positions, better transmission effect, and can avoid slippage during transmission. Furthermore, in one of the embodiments, the cup mouth sleeve of the fine powder cup 1420 is screwed to the bottom periphery of the coarse powder cup 1410, and the outer surface of the fine powder cup 1420 is provided with an anti-slip texture 1423. It can be understood that the anti-skid texture 1423 can enhance the friction of the outer surface of the fine powder cup 1420, and the user can twist the fine powder cup 1420 more easily through the anti-skid texture 1423, so that the fine powder cup 1420 and the coarse powder cup 1410 can be disassembled and assembled more quickly.

[0045] In one embodiment, a powder-digging piece 1310 is disposed on the linkage shaft 1520, and the powder-digging piece 1310 rotates in the coarse powder upper chamber 1411. It can be understood that because the powder-digging piece 1310 rotates in the coarse powder upper chamber 1411, the powder-digging piece 1310 can stir the coffee powder in the coarse powder upper chamber 1411 by rotation, turn the coffee powder, make the coffee powder in the coarse powder upper chamber 1411 more fluffy, and make it easier to sift out fine coffee powder.

[0046] Further, in one embodiment, the powder disc 1310 is arranged close to the powder screening disc 1510. It can be understood that by arranging the powder disc 1310 close to the powder screening disc 1510, the coffee powder close to the sieve hole 1511 of the powder screening disc 1510 can be fully stirred, so that the coffee powder can be more evenly dispersed on the powder screening disc 1510, avoiding the coffee powder from being too concentrated to block the sieve hole 1511, thereby accelerating the screening speed of the coffee powder. Of course, the powder disc 1310 is not limited to being arranged at the above position. For example, in another embodiment, the powder disc 1310 is arranged close to the cup mouth of the powder collecting cup 140. It can be understood that by arranging the powder disc 1310 close to the cup mouth of the powder collecting cup 140, the coffee powder falling into the cup mouth of the powder collecting cup 140 can be scattered, avoiding the coffee powder from agglomerating into a mass and affecting the screening efficiency.

[0047] In this embodiment, the number of powder discs 1310 includes two, namely, an upper powder disc 1320 and a lower powder disc 1330. The upper powder disc 1320 is arranged close to the mouth of the powder collecting cup 140, and the lower powder disc 1330 is arranged close to the powder screening disc 1510. It can be understood that not only can the upper powder disc 1320 be used to break up the coffee powder that falls into the mouth of the powder collecting cup 140, but also the lower powder disc 1330 can be used to make the coffee powder more evenly dispersed on the powder screening disc 1510, so that the coffee powder in the coarse powder upper cavity 1411 is more fluffy and dispersed, and finally accelerate the screening speed of the coffee powder. Of course, the number of powder discs 1310 is not limited to two. For example, in other embodiments, the number of powder discs 1310 is multiple, and the multiple powder discs 1310 are arranged at intervals along the transmission center axis 130. It can be understood that the coffee powder in the coarse powder upper cavity 1411 can be more fully stirred by the powder paddle 1310, which is more convenient for screening the coffee powder. Specifically, the powder paddle 1310 includes a sleeve ring 1311 and a powder stirring slurry 1312, the inner ring wall of the sleeve ring 1311 is sleeved on the shaft wall of the linkage shaft 1520, and the powder stirring slurry 1312 is convexly arranged on the outer ring wall of the sleeve ring 1311. It can be understood that the powder stirring slurry 1312 is sleeved on the shaft wall of the linkage shaft 1520 through the sleeve ring 1311. When the transmission center shaft 130 drives the grinding core 120 to perform the grinding operation, the transmission center shaft 130 can synchronously drive the powder stirring slurry 1312 and the powder screening disc 1510 to rotate, so that the grinding operation of the grinding core 120, the powder paddle operation of the powder paddle 1310 and the screening operation of the powder screening disc 1510 are all performed synchronously, avoiding additional processes and improving the screening efficiency and effect of coffee powder.

[0048] In one embodiment, the powder screening disc 1510 is 300 to 1000 meshes. It can be understood that by setting the powder screening disc 1510 to the range of 300 to 1000 meshes, the finer part of the coffee powder can be screened into the fine powder lower chamber 1421 for discarding, thereby avoiding the situation where the coffee powder is too fine and causes the coffee to taste bitter. Specifically, the powder screening disc 1510 can be 300 meshes, 600 meshes or 1000 meshes, of course, this is not limited here, and those skilled in the art can also make other choices according to needs.

[0049] like Figure 4 and Figure 5 As shown, the present disclosure further provides a coffee bean grinder 10, comprising a grinding and screening mechanism 100 of any of the above embodiments. It can be understood that by applying the grinding and screening mechanism 100 of the present disclosure to the coffee bean grinder 10, the coffee powder can be screened synchronously while grinding, without the need for additional operations, and ultimately making the use process more convenient and quick.

[0050] Compared with the prior art, the present invention has at least the following advantages:

[0051] The above-mentioned grinding and screening mechanism 100, because the coarse powder upper chamber 1411 is close to and connected to the cup mouth of the powder collecting cup 140, the cup mouth of the powder collecting cup 140 is connected to the grinding chamber 1110 of the grinding body 110, and the powder screening partition plate 1510 is arranged between the coarse powder upper chamber 1411 and the fine powder lower chamber 1421, so that the coffee powder in the grinding chamber 1110 can enter the coarse powder upper chamber 1411, and the coffee powder will be accumulated on the powder screening partition plate 1510 under the action of gravity. Because the transmission end of the transmission central shaft 130 is connected to the grinding core 120, the powder screening disc 1510 is connected to the end of the transmission end of the transmission central shaft 130 through the linkage shaft 1520, and the coarse powder upper chamber 1411 is connected to the fine powder lower chamber 1421 through each sieve hole 1511, so that the powder screening disc 1510 can rotate synchronously when the grinding core 120 rotates, so that when the grinding core 120 grinds coffee beans, the coffee powder is synchronously stirred in the coarse powder upper chamber 1411 during the rotation of the powder screening disc 1510, and finally the finer part of the coffee powder can be sieved into the fine powder lower chamber 1421 through the sieve hole 1511. Compared with the coffee bean grinder with a rotating powder spring screen structure in the prior art, the above-mentioned grinding and powder screening mechanism 100 can simultaneously drive the powder screening disk 1510 and the grinding core 120 on the transmission central shaft 130 to achieve synchronous screening of coffee powder during grinding without the need for additional operations, ultimately making the use process more convenient and quick.

[0052] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A grinding and screening mechanism, comprising: A grinding body, wherein a grinding center is arranged in a grinding cavity of the grinding body; A transmission shaft, the transmission shaft is rotatably disposed in the grinding body, and a transmission end of the transmission shaft is connected to the grinding core; the transmission shaft rotates with the grinding core in the grinding chamber of the grinding body, so that the grinding core grinds the coffee beans; A powder collecting cup, which is arranged at the powder outlet end of the grinding body, and the cup mouth of the powder collecting cup is connected to the grinding chamber of the grinding body; Characterized in that the grinding and powder screening mechanism further comprises a powder screening component; The powder screening component includes a powder screening partition plate and a linkage shaft; the powder screening partition plate and the linkage shaft are both arranged in the cup cavity of the powder collecting cup; the cup cavity of the powder collecting cup is divided into a coarse powder upper cavity and a fine powder lower cavity which are connected, and the coarse powder upper cavity is close to and connected to the cup mouth of the powder collecting cup; the powder screening partition plate is rotatably arranged between the coarse powder upper cavity and the fine powder lower cavity, and is connected to the end of the transmission end of the transmission middle shaft through the linkage shaft; the powder screening partition plate is provided with a plurality of sieve holes, and the coarse powder upper cavity is connected to the fine powder lower cavity through each of the sieve holes.

2. The powder grinding and screening mechanism according to claim 1, characterized in that: The linkage shaft includes a connecting rod and a rotating seat; the end of the transmission end of the transmission center shaft is connected to the rotating seat through the connecting rod; the rotating seat is arranged in the fine powder lower chamber and is rotatably connected to the bottom of the powder collecting cup; the powder screening disc is rotatably clamped on the rotating seat.

3. The powder grinding and screening mechanism according to claim 2, characterized in that: The rotating seat includes a locking portion, a platform portion and a rotating portion which are connected in sequence; the locking portion is locked to the connecting rod; a rotating hole is provided at the bottom of the powder collecting cup; the rotating portion is arranged in the rotating hole and is rotatably connected to the hole wall of the rotating hole; a rotating opening is provided on the powder screening disc, a top block is convexly provided on the surface of the platform portion, the rotating opening is sleeved on the locking portion, and the peripheral edge of the rotating opening is slidably supported on the top block through the sieve hole, so that the powder screening disc is tilted and rotated on the platform portion.

4. The powder grinding and screening mechanism according to claim 3, characterized in that: The inclination angle of the powder screening disc ranges from 3° to 4°.

5. The powder grinding and screening mechanism according to claim 2, characterized in that: The powder collecting cup comprises a coarse powder cup and a fine powder cup, the coarse powder upper chamber is the cup chamber of the coarse powder cup, the fine powder lower chamber is the cup chamber of the fine powder cup, the cup mouth of the powder collecting cup is opened at the top end of the coarse powder cup, the fine powder cup is detachably connected to the bottom periphery of the coarse powder cup, and the cup mouth of the fine powder cup is connected to the bottom end of the coarse powder cup; the powder screening partition is arranged at the cup mouth position of the fine powder cup to separate the coarse powder upper chamber and the fine powder lower chamber; the rotating seat is rotatably connected to the cup bottom of the fine powder cup, and is detachably clamped to the connecting rod.

6. The powder grinding and screening mechanism according to claim 5, characterized in that: A transmission slot is provided at the end of the connecting rod, and a locking portion is convexly provided on the rotating seat; the locking portion is arranged in the transmission slot; the locking portion is locked to the slot wall of the transmission slot and is magnetically connected to the slot bottom of the transmission slot.

7. The powder grinding and screening mechanism according to claim 1, characterized in that: A powder-prying piece is arranged on the linkage shaft, and the powder-prying piece rotates in the coarse powder upper cavity.

8. The powder grinding and screening mechanism according to claim 7, characterized in that: The powder separation plate is arranged close to the powder screening disk; or, The powder removing piece is arranged close to the cup opening of the powder collecting cup.

9. The powder grinding and screening mechanism according to any one of claims 1 to 8, characterized in that: The powder screening disc has a mesh size of 300 to 1000.

10. A coffee bean grinder, characterized in that: The invention comprises the grinding and screening mechanism according to any one of claims 1 to 9.

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