A coffee bean grinding method and apparatus

Abstract

The present application relates to the technical field of grinding device, especially to a coffee bean grinding device, which comprises a hopper, a feeding assembly arranged inside the hopper for feeding coffee beans in the hopper forward, and a grinding assembly arranged at the end of the hopper and behind the feeding direction of the feeding assembly for grinding coffee beans. In the present application, coffee beans are added to the hopper, and the feeding assembly inside the hopper feeds the coffee beans forward, and the coffee beans fed are ground by the grinding assembly to obtain powdered coffee. Meanwhile, since the suction mechanism is arranged at the top of the hopper, the silver skin generated by the coffee beans in the hopper can be continuously adsorbed, so as to ensure the quality and taste of the ground coffee.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and in particular to a method and apparatus for grinding coffee beans. Background Technology

[0002] Coffee beans refer to the fruit of the plant used to make coffee. Broadly speaking, there are two types of coffee beans in the world: Arabica beans and Robusta beans. The coffee fruit consists of two oval seeds facing each other, with the side that connects being flat, called a flat bean. However, there are also beans composed of a single round seed, called a round bean, but their taste is no different.

[0003] Coffee beans need to be ground by a grinder to obtain brewable coffee powder. However, most existing coffee grinders do not have the structure to remove the silverskin from coffee beans. The silverskin is the last "protective film" of coffee beans. Usually, after the coffee beans are processed and sent out of the warehouse, the inner pericarp is removed, leaving only a thin layer of silverskin covering the green coffee beans. These white silverskin fragments affect the overall appearance of the coffee and also produce a rough taste, affecting the product image. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a coffee bean grinding method and apparatus.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Design a coffee bean grinding device, including:

[0007] A material cylinder with a feed hopper installed on top;

[0008] A conveying assembly, located inside the feed cylinder, is used to convey coffee beans in the feed hopper forward.

[0009] A grinding assembly is installed at the end of the barrel and located behind the conveying assembly in the conveying direction, for grinding coffee beans;

[0010] A suction mechanism is also provided above the material cylinder, and the suction mechanism is connected to the material cylinder to absorb the dander in the material cylinder.

[0011] Furthermore, the conveying assembly includes a first spiral roller and a second spiral roller, wherein the first spiral roller and the second spiral roller are coaxially arranged and can rotate relative to each other, and a driving component is fixedly installed on one side of the material cylinder, the shaft of the driving component is fixedly connected to the first spiral roller, and the shaft is rotatably connected to the second spiral roller.

[0012] Furthermore, the grinding assembly includes a first grinding disc and a second grinding disc installed at the tail end of the material cylinder. The first grinding disc is fixed to the material cylinder, and a sleeve sleeved on the outside of the shaft is fixedly installed at one end of the second spiral roller. The sleeve and the shaft both penetrate and extend to the outside of the second grinding disc.

[0013] The second grinding disc is also equipped with a speed regulating mechanism for driving the second spiral roller to rotate, and the second grinding disc is connected to the shaft through the speed regulating mechanism.

[0014] Furthermore, the speed regulating mechanism includes a first conical wheel installed on the outside of the sleeve, the first conical wheel being sleeved on the outside of the shaft, a second conical wheel being fixed on the shaft, and a transmission component being provided between the first conical wheel and the second conical wheel.

[0015] Furthermore, the transmission component includes a slide block slidably connected to the outside of the shaft, the slide block being circumferentially locked to the shaft, two connecting rods being pinned to both ends of the slide block, and friction wheels being fixedly installed at both ends of the connecting rods. The two friction wheels are in close contact with the first conical wheel and the second conical wheel. A displacement mechanism for driving the slide block to move is also provided on the second grinding disc.

[0016] Furthermore, the displacement mechanism includes a counterweight block slidably connected to the end face of the second grinding disc, and a spring is fixedly connected between the counterweight block and the second grinding disc. A pull rod is also pinned between the counterweight block and the slide block.

[0017] Furthermore, the suction mechanism includes a suction frame, which has a bent U-shaped structure and has a cover plate inserted at both open ends. At least one suction tube is provided on the suction frame, and a piston rod is movably inserted into the suction tube.

[0018] The suction frame is equipped with at least one-way valve, and the piston rod is reciprocated by a drive component.

[0019] Furthermore, the driving component includes a rotating shaft rotatably connected to the barrel support, an eccentric rod fixedly mounted at one end of the rotating shaft, the eccentric rod being connected to the piston rod via a driving rod, a gear also being mounted at one end of the rotating shaft, and a gear ring meshing with the gear being mounted on the outer side of the second grinding disc.

[0020] Furthermore, an adjusting disc is installed at the tail end of the material cylinder, and an adjusting screw is threaded onto the adjusting disc. The end of the adjusting screw is rotatably connected to the first grinding disc.

[0021] The present invention also proposes a method for grinding coffee beans, using the above-mentioned apparatus, the method comprising the following steps;

[0022] S1. Add coffee beans to the feed hopper, and convey the coffee beans forward through the conveying component inside the feed cylinder;

[0023] S2. Under the grinding of the grinding component, the coffee beans are ground to obtain powdered coffee. At the same time, since the suction mechanism is set at the top of the barrel, it can continuously absorb the silver skin produced by the coffee beans in the barrel to ensure the quality and taste of the ground coffee.

[0024] The present invention provides a coffee bean grinding method and apparatus, which has the following advantages: In this invention, coffee beans are added to the feed hopper and conveyed forward by the conveying component inside the feed cylinder. The coffee beans are then ground by the grinding component to obtain powdered coffee. At the same time, since the suction mechanism is located at the top of the feed cylinder, it can continuously adsorb the silver skin produced by the coffee beans in the feed cylinder to ensure the quality and taste of the ground coffee. Attached Figure Description

[0025] Figure 1 The three-dimensional representation of the present invention Figure 1 ;

[0026] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0027] Figure 3 This is a schematic diagram of the second spiral roller structure of the present invention;

[0028] Figure 4 The three-dimensional representation of the present invention Figure 2 ;

[0029] Figure 5 for Figure 4 A magnified structural diagram of area A;

[0030] Figure 6 This is a schematic diagram of the one-way valve structure of the present invention;

[0031] Figure 7 The three-dimensional representation of the present invention Figure 3 ;

[0032] Figure 8 for Figure 7 A magnified structural diagram of area B.

[0033] In the diagram: 1. Material cylinder; 11. Feed hopper; 12. Adjusting disc; 13. Adjusting screw; 2. Conveying assembly; 21. First spiral roller; 22. Second spiral roller; 221. Sleeve; 23. Drive component; 231. Shaft; 3. Grinding assembly; 31. First grinding disc; 32. Second grinding disc; 4. Suction mechanism; 41. Suction frame; 42. Cover plate; 43. Suction pipe; 44. Piston rod; 45. One-way valve; 46. Eccentric rod; 47. Drive rod; 48. Gear; 49. Gear ring; 5. Speed ​​regulating mechanism; 51. First conical wheel; 52. Second conical wheel; 53. Transmission component; 531. Slide seat; 532. Connecting rod; 533. Friction wheel; 534. Counterweight; 535. Spring; 536. Pull rod. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Reference Figure 1-8 As one embodiment of the present invention, a coffee bean grinding device is disclosed, the device comprising:

[0036] A material cylinder 1 is provided with a feeding hopper 11 installed on its top and a support is installed below the material cylinder 1 so that the material cylinder 1 can be placed horizontally on the ground by means of the support.

[0037] The conveying assembly 2 is located inside the feed cylinder 1 and is used to convey coffee beans in the feed hopper 11 forward.

[0038] The grinding component 3 is installed at the end of the feed cylinder 1 and is located behind the conveying component 2 in the conveying direction, and is used to grind coffee beans;

[0039] A suction mechanism 4 is provided above the material cylinder 1. The suction mechanism 4 is connected to the material cylinder 1 and is used to adsorb the dander in the material cylinder 1.

[0040] Reference Figure 2 , 3 In some embodiments, the conveying assembly 2 includes a first spiral roller 21 and a second spiral roller 22, wherein the first spiral roller 21 and the second spiral roller 22 are coaxially arranged and can rotate relative to each other. A driving component 23 is also fixedly installed on one side of the material cylinder 1. In this embodiment, the driving component 23 is a motor. The shaft 231 of the driving component 23 is fixedly connected to the first spiral roller 21. The shaft 231 is the shaft end of the motor or a rod connected to the shaft end of the motor. These are all conventional technical means and will not be described in detail here. The shaft 231 is rotatably connected to the second spiral roller 22.

[0041] Specifically, in this invention, the suction mechanism 4 is positioned above the second spiral roller 22. Coffee beans are fed using the relatively rotating first spiral roller 21 and second spiral roller 22. Because they rotate separately, the suction mechanism 5 can quickly absorb the coffee shavings generated at the second spiral roller 22, ensuring the quality of the ground coffee. Furthermore, the rotation speed of the second spiral roller 22 can be adjusted to prevent the coffee beans from being fed too quickly, which could affect the absorption effect. The method of speed adjustment will be described in detail later.

[0042] Furthermore, the grinding assembly 3 of the present invention includes a first grinding disc 31 and a second grinding disc 32 installed at the tail end of the material cylinder 1. The first grinding disc 31 is fixed to the material cylinder 1. A sleeve 221 sleeved on the outside of the shaft 231 is fixedly installed at one end of the second spiral roller 22. The sleeve 221 and the shaft 231 both penetrate and extend to the outside of the second grinding disc 32.

[0043] Reference Figure 7 , 8 The second grinding disc 32 is also provided with a speed regulating mechanism 5 for driving the second spiral roller 22 to rotate, and the second grinding disc 32 is connected to the shaft 231 through the speed regulating mechanism 5.

[0044] In this embodiment, by adopting the design of the speed regulating mechanism 5, the transmission between the shaft 231 and the second grinding disc 32 can be realized, so as to ensure that when the driving component 23 drives the shaft 231 to rotate, the second grinding disc 32 can be driven to rotate through the speed regulating mechanism 5. The rotation of the second grinding disc 32 cooperates with the first grinding disc 31 to grind the coffee beans. At the same time, the transmission between the shaft 231 and the sleeve 221 is realized through the speed regulating mechanism 5, so as to drive the sleeve 221 to rotate and drive the second spiral roller 22 to rotate, thereby realizing the conveying.

[0045] Furthermore, the speed regulating mechanism 5 of the present invention includes a first conical wheel 51 installed on the outside of the sleeve 221, the first conical wheel 51 being sleeved on the outside of the shaft 231, a second conical wheel 52 being fixed on the shaft 231, and a transmission member 53 being provided between the first conical wheel 51 and the second conical wheel 52.

[0046] Reference Figure 8For example, the aforementioned transmission component 53 includes a slide block 531 slidably connected to the outside of the shaft 231. The slide block 531 is circumferentially locked to the shaft 231. In this embodiment, a guide protrusion can be provided on the outside of the shaft 231, and a guide groove can be provided in the inner ring of the slide block 531 to prevent relative rotation between the slide block 531 and the shaft 231. Two connecting rods 532 are pinned to both ends of the slide block 531, and friction wheels 533 are fixedly installed at both ends of the connecting rods 532. The two friction wheels 533 are tightly fitted with the first conical wheel 51 and the second conical wheel 52. A displacement mechanism for driving the slide block 531 to move is also provided on the second grinding disc 32.

[0047] In other words, in this embodiment, when the shaft 231 rotates, it drives the second conical wheel 52 to rotate. Since a connecting rod 532 is provided between the first conical wheel 51 and the second conical wheel 51, the two ends of the connecting rod 532 are connected by two friction wheels 533 to transmit the rotational power of the second conical wheel 52 to the first conical wheel 51. Since the first conical wheel 51 is fixed to the sleeve 221, it can drive the second spiral roller 22 to rotate, thereby realizing that the first spiral roller 21 and the second spiral roller 22 rotate simultaneously to transport coffee beans. In addition, the displacement mechanism can make the slide 531 move to change the position of the two friction wheels 533 on the first conical wheel 51 and the second conical wheel 52. Since the angular velocities are different, the rotational speed between the two is changed, thereby realizing the speed adjustment of the second spiral rod 22.

[0048] Furthermore, the displacement mechanism includes a counterweight 534 slidably connected to the end face of the second grinding disc 32, and a spring 535 is fixedly connected between the counterweight 534 and the second grinding disc 32. A pull rod 536 is also pinned between the counterweight 534 and the slide block 531.

[0049] Reference Figure 8 Specifically, in this invention, the displacement mechanism consists of two counterweights 534. During the grinding process of the second grinding disc 32, the counterweights 534 move towards the side of the second grinding disc 32 under the action of centrifugal force. Therefore, the sliding block 531 can be moved by the pull rod 536, thereby driving the two friction wheels 533 on the connecting rod 532 to move, so as to realize the speed adjustment between the first conical wheel 51 and the second conical wheel 52. Specifically, the faster the speed of the driving member 13, the greater the centrifugal force of the counterweights 534 on the second grinding disc 32. At this time, the relative movement distance generated by the sliding block 531 becomes larger, thus realizing the relative deceleration of the sleeve 221. Therefore, it can be ensured that the coffee beans are kept at a low speed at the second spiral roller 22 under the state of high-speed grinding, so as to ensure that the suction mechanism 4 can remove the silver skin in a sufficient time, thus ensuring the taste of the coffee beans after grinding.

[0050] Reference Figure 4-6 Furthermore, the suction mechanism 4 described in this invention includes a suction frame 41, which has a bent U-shaped structure and a cover plate 42 inserted at its two open ends. At least one suction tube 43 is provided on the suction frame 41, and a piston rod 44 is movably inserted into the suction tube 43. The piston rod 44 is composed of a rod and a piston head.

[0051] The suction frame 41 is provided with at least one-way valve 45, and the function of the one-way valve 45 is as follows:

[0052] When the piston rod 44 is suctioning, the silver sheet in the material cylinder 1 is sucked into the suction frame 41 by the suction force. At this time, the one-way valve 45 is opened and the silver sheet falls below the one-way valve 45. Of course, in this embodiment, in order to prevent the silver sheet from entering the suction pipe 43, a filter screen can be provided at the end of the suction pipe 43 to block the silver sheet.

[0053] When the piston rod 44 is pushed in, it pushes air into the suction frame 41 to blow the silver sheet in the suction frame 41 downward. Of course, in this embodiment of the invention, two one-way valves 45 can be set between a suction tube 43. The two one-way valves 45 open in opposite directions to prevent the silver sheet that falls to the bottom of the suction frame 41 from being sucked back up.

[0054] The piston rod 44 is reciprocated and inserted through a drive component.

[0055] Reference Figure 5 Specifically, the driving component includes a rotating shaft rotatably connected to the support of the material cylinder 1. An eccentric rod 46 is fixedly installed at one end of the rotating shaft. The eccentric rod 46 is connected to the piston rod 44 through a driving rod 47. A gear 48 is also installed at one end of the rotating shaft. A gear ring 49 that meshes with the gear 48 is installed on the outer side of the second grinding disc 32.

[0056] In other words, when the second grinding disc 32 rotates, its outer toothed ring 49 drives the aforementioned gear 48 to rotate, the gear 48 drives the rotating shaft to rotate, and the rotating shaft drives the piston rod 44 to reciprocate through the eccentric rod 46 and the drive rod 47, thereby generating suction in the suction tube 43 to achieve the suction of the silver sheet.

[0057] Reference Figure 4 It should be noted that, in order to adjust the grinding particles, an adjusting disc 12 is installed at the tail end of the feed cylinder 1 in this invention. An adjusting screw 13 is threaded onto the adjusting disc 12. The end of the adjusting screw 13 is rotatably connected to the first grinding disc 31. That is, in this invention, the first grinding disc 31 is moved by bolting the adjusting screw 13 on the adjusting disc 12 to change the gap between the first grinding disc 31 and the second grinding disc 32, thereby achieving the adjustment of the grinding particles.

[0058] In addition, the present invention also discloses a coffee bean grinding method, which uses the above-mentioned apparatus, and the method includes the following steps;

[0059] S1. Add coffee beans to the feed hopper 11 and convey the coffee beans forward through the conveying component 2 inside the feed cylinder 1;

[0060] S2. Under the grinding of the grinding component 3, the coffee beans are ground to obtain powdered coffee. At the same time, since the suction mechanism 4 is located at the top of the barrel 1, it can continuously adsorb the silver skin produced by the coffee beans in the barrel 1 to ensure the quality and taste of the ground coffee.

[0061] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A coffee bean grinding device, characterized in that, include: A material cylinder (1) with a feeding hopper (11) installed on top of it; The conveying assembly (2) is located inside the feed cylinder (1) and is used to convey coffee beans in the feed hopper (11) forward. The grinding assembly (3) is installed at the end of the barrel (1) and is located behind the conveying assembly (2) in the conveying direction, for grinding coffee beans; A suction mechanism (4) is provided above the material cylinder (1), and the suction mechanism (4) is connected to the material cylinder (1) to adsorb the dander in the material cylinder (1); the conveying assembly (2) includes a first spiral roller (21) and a second spiral roller (22), wherein the first spiral roller (21) and the second spiral roller (22) are coaxially arranged and can rotate relative to each other, and a driving member (23) is fixedly installed on one side of the material cylinder (1), and the shaft (231) of the driving member (23) is connected to the first spiral roller (22). The spiral roller (21) is fixedly connected, and the shaft (231) is rotatably connected to the second spiral roller (22); the grinding assembly (3) includes a first grinding disc (31) and a second grinding disc (32) installed at the tail end of the material cylinder (1). The first grinding disc (31) is fixed to the material cylinder (1), and a sleeve (221) sleeved on the outside of the shaft (231) is fixedly installed at one end of the second spiral roller (22). The sleeve (221) and the shaft (231) both penetrate and extend to the outside of the second grinding disc (32). Among them, a speed regulating mechanism (5) for driving the second spiral roller (22) to rotate is also provided on the second grinding disc (32). The second grinding disc (32) is connected to the shaft (231) through the speed regulating mechanism (5). The second grinding disc (32) is driven to rotate through the speed regulating mechanism (5). The rotation of the second grinding disc (32) cooperates with the first grinding disc (31) to grind coffee beans. At the same time, the transmission between the shaft (231) and the sleeve (221) is realized through the speed regulating mechanism (5) to drive the sleeve (221) to rotate and drive the second spiral roller (22) to rotate, so as to realize the conveying. The transmission component (53) includes a slide block (531) slidably connected to the outside of the shaft (231). A displacement mechanism for driving the slide block (531) to move is also provided on the second grinding disc (32). The displacement mechanism includes a counterweight (534) slidably connected to the end face of the second grinding disc (32). The faster the rotation speed of the driving component (23), the greater the centrifugal force of the counterweight (534) on the second grinding disc (32). At this time, the relative movement distance generated by the slide block (531) becomes larger, thereby achieving relative deceleration of the sleeve (221). Therefore, it can ensure that the coffee beans are kept at a low speed at the second spiral roller (22) under the condition of high-speed grinding.

2. The coffee bean grinding device according to claim 1, characterized in that: The speed regulating mechanism (5) includes a first conical wheel (51) installed on the outside of the sleeve (221), the first conical wheel (51) being sleeved on the outside of the shaft (231), a second conical wheel (52) being fixed on the shaft (231), and a transmission component (53) being provided between the first conical wheel (51) and the second conical wheel (52).

3. The coffee bean grinding device according to claim 2, characterized in that: The slide (531) is circumferentially locked to the shaft (231). Two connecting rods (532) are pinned to both ends of the slide (531). Friction wheels (533) are fixedly installed at both ends of the connecting rods (532). The two friction wheels (533) are in close contact with the first conical wheel (51) and the second conical wheel (52).

4. The coffee bean grinding device according to claim 3, characterized in that: A spring (535) is fixedly connected between the counterweight (534) and the second grinding disc (32), and a pull rod (536) is also pinned between the counterweight (534) and the slide (531).

5. A coffee bean grinding device according to claim 1, characterized in that: The suction mechanism (4) includes a suction frame (41), which has a bent U-shaped structure and a cover plate (42) inserted at its two open ends. At least one suction tube (43) is provided on the suction frame (41), and a piston rod (44) is movably inserted into the suction tube (43). The suction frame (41) is provided with at least one one-way valve (45), and the piston rod (44) is reciprocated and inserted by a driving component.

6. A coffee bean grinding device according to claim 5, characterized in that: The driving component includes a rotating shaft rotatably connected to the support of the barrel (1), an eccentric rod (46) fixedly installed at one end of the rotating shaft, the eccentric rod (46) being connected to the piston rod (44) via a driving rod (47), a gear (48) being installed at one end of the rotating shaft, and a gear ring (49) meshing with the gear (48) being installed on the outer side of the second grinding disc (32).

7. A coffee bean grinding device according to claim 1, characterized in that: An adjusting disc (12) is installed at the tail end of the material cylinder (1), and an adjusting screw (13) is threaded onto the adjusting disc (12). The end of the adjusting screw (13) is rotatably connected to the first grinding disc (31).

8. A method for grinding coffee beans, characterized in that: Using the apparatus of any one of claims 1-7, the method comprises the following steps; S1. Add coffee beans to the feed hopper (11) and convey the coffee beans forward through the conveying component (2) inside the feed cylinder (1); S2. Under the grinding of the grinding component (3), the coffee beans are ground to obtain powdered coffee. At the same time, since the suction mechanism (4) is set at the top of the barrel (1), it can continuously adsorb the silver skin produced by the coffee beans in the barrel (1) to ensure the quality and taste of the ground coffee.

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