Coffee bean grinding unit and grinding equipment

Abstract

The invention relates to the technical field of grinding machines, in particular to a coffee bean grinding unit and grinding device.The coffee bean grinding unit comprises roller assemblies, a spacing adjusting assembly and a fence assembly, the spacing adjusting assembly is used for adjusting the distance between every two adjacent roller assemblies and comprises a balance wheel fixed to the roller assemblies and a rotating wheel used for driving the balance wheel to rotate; the center axis of the balance wheel deviates from the center axis of the rotating wheel, a grinding cavity is formed in the enclosure assembly, and the enclosure assembly at least comprises an upper enclosure which is arranged above the roller assembly in a floating mode so as to limit grinding materials in the grinding cavity. A cam structure formed by the rotating wheel and the balance wheel is used for driving the roller assemblies to swing, so that the distance between every two adjacent roller assemblies is adjusted, meanwhile, the upper enclosure arranged in a floating mode is used for keeping synchronous movement with the roller assemblies, the gap between the upper enclosure and the roller assemblies can be reduced as much as possible under the condition that the roller assemblies are not interfered, and the service life of the roller assemblies is prolonged. And coffee powder is effectively prevented from leaking out.

Description

Technical Field

[0001] The present invention relates to the technical field of grinders, and in particular to a coffee bean grinding unit and a grinding device. Background Art

[0002] In the process of making coffee, coffee beans need to be ground into coffee powder first, and the grinding process requires a grinder. In a small commercial grinder, two sets of parallel blades are generally set. The coffee beans are put in, squeezed and sheared by the tiny grooves set between the two pairs of blades, and finally thrown out by the centrifugal force brought by the rotation. However, the blades will inevitably wear out after a period of use. The different shapes of wear will lead to uneven fineness of the coffee powder, which will directly affect the taste and quality of the coffee. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problem that the small commercial coffee bean grinder in the prior art mainly uses two parallel knife discs to squeeze and shear the coffee beans, the actual gap cannot be accurately controlled, and the higher requirements for coffee taste and quality cannot be met, a coffee bean grinding unit and grinding equipment are now provided.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: a coffee bean grinding unit, comprising:

[0005] Roller assemblies, at least two in number;

[0006] A spacing adjustment assembly, used for adjusting the distance between two adjacent roller assemblies, comprising a balance wheel fixed to the roller assembly and a rotating wheel used for driving the balance wheel to rotate, wherein the central axis of the balance wheel deviates from the central axis of the rotating wheel;

[0007] and a containment assembly, wherein a grinding chamber is formed inside the containment assembly and the containment assembly at least comprises an upper containment assembly which is floated above the roller assembly to confine the abrasive within the grinding chamber.

[0008] Furthermore, the roller assembly is an outer rotor roller structure.

[0009] Furthermore, the roller assembly includes a central shaft, an inner stator fixed to the central shaft, an outer rotor located outside the inner stator, and a grinding roller fixed to the outside of the outer rotor.

[0010] Furthermore, the roller assembly is mounted on the end plate, the upper enclosure is located on the inner side of the end plate and protrudes toward the end plate to form a boss, the end plate is provided with a slide groove for the boss to slide, and an elastic member is installed in the slide groove, one end of the elastic member abuts against the groove wall of the slide groove, and the other end abuts against the boss.

[0011] Furthermore, the end of the central axis is contracted to form a connecting portion for inserting the balance wheel and connecting with its profile.

[0012] Furthermore, the rotating wheel is a driven gear, the driven gear is meshedly connected with a driving gear, and the driving gear is driven by a rotation driving mechanism.

[0013] Furthermore, an adjustment block is rotatably arranged inside the end plate, and the slide groove is located inside the adjustment block.

[0014] Furthermore, a grinding device comprises a plurality of the above-mentioned grinding units.

[0015] Furthermore, the positioning mechanism includes positioning grooves formed by depressions on both sides of the grinding unit in the longitudinal direction and positioning pins for inserting into the positioning grooves on two adjacent grinding units.

[0016] Furthermore, the locking mechanism includes plug-in grooves formed by depressions on both sides of the grinding unit along its longitudinal direction, a fixing pin for inserting into the plug-in grooves on two adjacent grinding units, and a locking pin for resisting the fixing pin, and each fixing pin is recessed to form at least two locking grooves for the locking pin to be inserted into.

[0017] Beneficial effects of the present invention: The present invention utilizes the cam structure formed by the rotating wheel and the balance wheel to drive the roller assembly to swing, thereby realizing the adjustment of the distance between two adjacent roller assemblies, and at the same time utilizes the floating upper enclosure to maintain synchronous movement with the roller assembly, and minimizes the gap between the roller assembly and the roller assembly without interfering with the roller assembly, thereby effectively preventing the leakage of coffee powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 is a three-dimensional schematic diagram of the present invention from a first viewing angle;

[0020] Figure 2 is a three-dimensional schematic diagram of a second viewing angle of the present invention;

[0021] Figure 3 is a top view of the present invention;

[0022] Figure 4 yes Figure 3 Sectional view in the AA direction;

[0023] Figure 5 yes Figure 3 Cross-sectional view in the BB direction;

[0024] Figure 6 It is a structural schematic diagram of the roller assembly;

[0025] Figure 7 is a schematic diagram of the structure of the spacing adjustment component;

[0026] Figure 8 yes Figure 7 A partial enlarged view of part C in the middle;

[0027] Fig. 9 It is a schematic diagram of the structure of the upper enclosure and the lower enclosure;

[0028] Fig.10 It is an exploded view of the roller assembly and the spacing adjustment assembly.

[0029] In the figure:

[0030] 1. Roller assembly; 101. Central axis; 1011. Connecting part; 102. Inner stator; 103. Outer rotor; 104. Grinding roller; 105. End cover; 106. Bearing 106;

[0031] 2. Spacing adjustment component; 201. Balance wheel; 202. Rotating wheel; 203. Driving gear; 204. Rotating drive mechanism; 205. Bushing;

[0032] 3. enclosure assembly; 301. upper enclosure; 3011. boss; 302. lower enclosure; 303. side enclosure;

[0033] 4. End plate;

[0034] 5. Elastic parts;

[0035] 6. Slider;

[0036] 7. Adjustment block;

[0037] 8. Positioning slot;

[0038] 9. Positioning pin;

[0039] 10. Plug slot;

[0040] 11. fixing pin; 1101. locking slot;

[0041] 12. Locking pin;

[0042] 13. Connecting plate;

[0043] 14. Chute. DETAILED DESCRIPTION

[0044] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention, and directions and references (e.g., up, down, left, right, etc.) may only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not to be taken in a limiting sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0045] like Figure 1-Figure 3 As shown, a coffee bean grinding unit comprises a roller assembly 1, a spacing adjustment assembly 2 and a barrier assembly 3, wherein the number of the roller assemblies 1 is at least two;

[0046] The spacing adjustment component 2 is used to adjust the distance between two adjacent roller components 1, and includes a balance wheel 201 fixed to the roller component 1 and a rotating wheel 202 used to drive the balance wheel 201 to rotate. The balance wheel 201 is fixed to the end of the roller component 1, and the middle part of the roller component 1 is used for grinding. The central axis of the balance wheel 201 deviates from the central axis of the rotating wheel 202, and the two form a cam structure. The rotating wheel 202 rotates to drive the balance wheel 201 to rotate synchronously, and the balance wheel 201 drives the roller component 1 to swing, thereby realizing the spacing adjustment between the two adjacent roller components 1. Figure 8 As shown, D1 is the center of the rotating wheel 202, and D2 is the center of the balance wheel 201, and the two are offset from each other;

[0047] The number of the spacing adjustment components 2 can be the same as the number of the roller components 1, and the two correspond one to one. Each spacing adjustment component 2 drives the corresponding roller component 1 to move. Of course, the number of the spacing adjustment components 2 can be one less than the number of the roller components 1. The roller component 1 without the spacing adjustment component 2 is used as a fixed grinding roller, which can be used as a reference, and the remaining roller components 1 are adjustable grinding rollers, which can be adjusted separately;

[0048] A grinding chamber is formed inside the enclosure assembly 3, and at least includes an upper enclosure 301 that is floatingly arranged above the roller assembly 1 to confine the abrasive in the grinding chamber, and also includes a lower enclosure 302 arranged below the roller assembly 1 and side enclosures 303 arranged on both sides of the roller assembly 1. The lower end of the upper enclosure 301 is formed with a matching arc surface that matches the outer shape of the roller assembly 1, and the thickness of the upper end gradually increases from top to bottom. The upper end of the lower enclosure 302 is also formed with a matching arc surface that matches the outer shape of the roller assembly 1, and the thickness of the upper end gradually increases from top to bottom, such as Figure 4 and Fig. 9 shown.

[0049] The lower enclosure 302 and the side enclosure 303 can be fixedly arranged. However, since the abrasive is dropped from above the roller assembly 1, it will be ejected when it enters between two adjacent roller assemblies 1 for grinding. If the upper enclosure 301 is fixedly arranged and fits with the roller assembly 1, it will interfere with the grinding roller 104 when the spacing of the roller assembly 1 is adjusted. The reason for the interference is that when the roller assembly 1 adjusts the spacing through the cam structure, it will not only have a lateral displacement, but also a longitudinal displacement, which will cause interference. In order to avoid interference, if the distance from the roller assembly 1 is far, some unground or incompletely ground abrasive will leak out from between the upper enclosure 301 and the roller assembly 1.

[0050] During operation, coffee beans are firstly put in from above the roller assembly 1, and then the coffee beans enter between the two roller assemblies 1 for grinding, and the enclosure assembly 3 formed by the upper enclosure 301, the lower enclosure 302 and the side enclosure 303 confines the coffee beans in the grinding chamber;

[0051] When the grinding fineness needs to be adjusted, the rotating wheel 202 is rotated, and the rotating wheel 202 drives the balance wheel 201 to rotate, and the balance wheel 201 drives the corresponding roller assembly 1 to swing to get closer to or away from the adjacent roller assembly 1, and during the adjustment of the roller assembly 1, the upper enclosure 301 will follow and adaptively adjust its own position to avoid interference with the roller assembly 1 or excessive distance from the roller assembly 1.

[0052] In some examples, the roller assembly is an outer rotor roller structure, which makes the overall structure of the grinding unit more compact.

[0053] In some examples, such as Figure 5 As shown, the roller assembly 1 includes a central shaft 101, an inner stator 102 fixed to the central shaft 101, an outer rotor 103 located outside the inner stator 102, and a grinding roller 104 fixed to the outside of the outer rotor 103. The outer rotor 103 is fixed with end covers 105 at both ends along its axial direction. A bearing 106 is installed between the end cover 105 and the central shaft 101. The outer rotor 103 can drive the grinding roller 104 to rotate.

[0054] In some examples, such as Figure 7 and Figure 8 As shown, the roller assembly 1 is mounted on the end plate 4, the upper enclosure 301 is located on the inner side of the end portion and protrudes toward the end plate 4 to form a boss 3011, the end plate 4 is provided with a slide groove 14 for the boss 3011 to slide, and an elastic member 5 is installed in the slide groove 14, one end of the elastic member 5 abuts against the groove wall of the slide groove 14, and the other end abuts against the boss 3011, and the elastic member 5 can be a spring; when the roller assembly 1 is displaced, the grinding roller 104 applies pressure to the upper enclosure 301, and the boss 3011 of the upper enclosure 301 slides in the slide groove 14 and cooperates with the elastic member 5, so that the upper enclosure 301 is displaced synchronously.

[0055] In some examples, such as Fig.10 As shown, the end of the central shaft 101 is contracted to form a connecting portion 1011 for inserting the balance wheel 201 and connecting with its profile. The balance wheel 201 is provided with a connecting hole for the connecting portion 1011 to be inserted. The cross-sections of the connecting portion 1011 and the connecting hole are both non-circular structures. Balance wheels 201 are provided at both ends of the same roller assembly 1. When the balance wheel 201 on one side drives the roller assembly 1 to swing, the balance wheel 201 on the other side rotates synchronously, thereby ensuring the synchronization of the two ends of the roller assembly 1.

[0056] In some examples, such as Figure 1 , Figure 2 and Figure 6 As shown, the rotating wheel 202 is a driven gear, and the driven gear is meshedly connected with a driving gear 203. The driving gear 203 is driven by a rotation driving mechanism 204. In this embodiment, there are two roller assemblies 1. The two driven gears located at the same end of the two roller assemblies 1 are driven by the same driving gear 203. The driving gear 203 is located between the two driven gears. The rotation driving mechanism 204 can be an electric structure or a manual structure. The electric structure can be but not limited to a servo motor, a stepper motor or a steering gear, etc. The manual structure can be a hand wheel. In this embodiment, there are two rotation driving mechanisms 204, which are distributed on both sides of the roller assembly 1, and one of them is a steering gear and the other is a hand wheel. When the steering gear fails, it can be adjusted manually.

[0057] In some examples, such as Figure 7 and Figure 8 As shown, an adjusting block 7 is rotatably arranged in the end plate 4, the slide groove 14 is located in the adjusting block 7, and a slider 6 is slidably arranged in the slide groove 14, the slider 6 is fixed to the boss 3011, and a receiving groove for accommodating the elastic member 5 is opened on the slider 6; because the balance wheel 201 and the rotating wheel 202 corresponding to the two roller assemblies 1 are not necessarily symmetrically arranged, the movement strokes of the two roller assemblies 1 are not necessarily the same when the spacing of the grinding rollers 104 is adjusted, and the rotatably arranged adjusting block 7 allows the upper baffle to be tilted to a certain extent;

[0058] like Figure 2 As shown, at least two connecting plates 13 are provided between the two end plates 4 . The connecting plates 13 are distributed on both sides of the upper enclosure 301 , and a gap is left between the connecting plates 13 and the upper enclosure 301 to avoid interference with the movement of the upper enclosure 301 .

[0059] In some examples, a grinding device includes a plurality of grinding units, which are stacked vertically and have positioning mechanisms and locking mechanisms between two adjacent grinding units. The grinding particle sizes of the plurality of grinding units are set to gradually decrease. When coffee beans are put into the top grinding unit, they are ground in multiple stages by the plurality of grinding units to obtain coffee powder with a more uniform fineness.

[0060] In some examples, such as Figure 1 and Figure 2 As shown, the positioning mechanism includes positioning grooves 8 formed by depressions on both sides of the grinding unit along its longitudinal direction and positioning pins 9 for inserting into the positioning grooves 8 on two adjacent grinding units. The positioning pins 9 cooperate with the positioning grooves 8 to provide preliminary positioning during the stacking process of the grinding units. The number of positioning grooves 8 on a single side of the grinding unit is at least two.

[0061] In some examples, such as Figure 1 and Figure 2 As shown, the locking mechanism includes an insertion groove 10 formed by depressions on both sides of the grinding unit along the longitudinal direction, a fixing pin 11 for inserting into the insertion groove 10 on two adjacent grinding units, and a locking pin 12 for resisting the fixing pin 11. The fixing pin 11 and the locking pin 12 are cross-arranged. After the fixing pin 11 is longitudinally inserted into the two adjacent grinding units, the locking pin 12 is transversely inserted into the grinding units, and its head abuts against the outer peripheral wall of the fixing pin 11 to fix the fixing pin 11.

[0062] Each fixing pin 11 is recessed to form at least two locking grooves 1101 for the locking pin 12 to be inserted into. After the locking pin 12 is inserted into the locking groove 1101 , it abuts against the groove wall of the locking groove 1101 to improve the locking effect of the fixing pin 11 .

[0063] Working principle:

[0064] During operation, coffee beans are firstly put into the roller assembly 1, and then the coffee beans enter between the two grinding rollers 104 for grinding. The enclosure assembly 3 formed by the upper enclosure 301, the lower enclosure 302 and the side enclosure 303 confines the coffee beans in the grinding chamber.

[0065] When the grinding fineness needs to be adjusted, the rotating wheel 202 is rotated, and the rotating wheel 202 drives the balance wheel 201 to rotate, and the balance wheel 201 drives the corresponding roller assembly 1 to swing to get closer to or away from the roller assembly 1 adjacent to it, and during the adjustment of the roller assembly 1, the grinding roller 104 applies pressure to the upper enclosure 301, and the convex column 3011 of the upper enclosure 301 slides in the slide groove 14 and cooperates with the elastic member 5, so that the upper enclosure 301 is synchronously displaced for adaptive adjustment to avoid interference with the roller assembly 1 or excessive distance from the roller assembly 1.

[0066] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A coffee bean grinding unit, characterized in that: include: Roller assemblies (1), at least two in number; A spacing adjustment assembly (2) is used to adjust the distance between two adjacent roller assemblies (1), comprising a balance wheel (201) fixed to the roller assembly (1) and a rotating wheel (202) used to drive the balance wheel (201) to rotate, wherein the central axis of the balance wheel (201) deviates from the central axis of the rotating wheel (202); and a containment assembly (3) having a grinding chamber formed therein and comprising at least an upper containment assembly (301) which is floatably arranged above the roller assembly (1) to confine the abrasive within the grinding chamber.

2. The coffee bean grinding unit according to claim 1, characterized in that: The roller assembly (1) is an outer rotor roller structure.

3. The coffee bean grinding unit according to claim 2, characterized in that: The roller assembly (1) comprises a central shaft (101), an inner stator (102) fixed to the central shaft (101), an outer rotor (103) located outside the inner stator (102), and a grinding roller (104) fixed to the outside of the outer rotor (103).

4. The coffee bean grinding unit according to claim 1, characterized in that: The roller assembly (1) is mounted on the end plate (4); the upper enclosure (301) is located on the inner side of the end plate (4) and protrudes toward the end plate (4) to form a convex column (3011); the end plate (4) is provided with a slide groove (14) for the convex column (3011) to slide, and an elastic member (5) is installed in the slide groove (14); one end of the elastic member (5) abuts against the groove wall of the slide groove (14), and the other end abuts against the convex column (3011).

5. The coffee bean grinding unit according to claim 3, characterized in that: The end of the central shaft (101) is contracted to form a connecting portion (1011) for inserting the balance wheel (201) and connecting with its profile.

6. The coffee bean grinding unit according to claim 1, characterized in that: The rotating wheel (202) is a driven gear, which is meshedly connected with a driving gear (203), and the driving gear (203) is driven by a rotation driving mechanism (204).

7. The coffee bean grinding unit according to claim 3, characterized in that: An adjustment block (7) is rotatably arranged inside the end plate (4), and the slide groove (14) is located inside the adjustment block (7).

8. A grinding device, characterized in that: It comprises a plurality of coffee bean grinding units as described in any one of claims 1 to 7, wherein the plurality of grinding units are stacked vertically and a positioning mechanism and a locking mechanism are provided between two adjacent grinding units.

9. A grinding device according to claim 8, characterized in that: The positioning mechanism comprises positioning grooves (8) formed by depressions on both sides of the grinding unit in the longitudinal direction and positioning pins (9) used for inserting into the positioning grooves (8) on two adjacent grinding units.

10. A grinding device according to claim 8, characterized in that: The locking mechanism comprises an inserting groove (10) formed by depressions on both sides of the grinding unit in the longitudinal direction, a fixing pin (11) for inserting into the inserting grooves (10) on two adjacent grinding units, and a locking pin (12) for resisting against the fixing pin (11), and each fixing pin (11) is recessed to form at least two locking grooves (1101) for the locking pin (12) to be inserted into.

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