Precise weighing coarse and fine grinding mechanism of key type coffee machine

Abstract

The utility model relates to a key-type accurate weighing coarse and fine grinding mechanism of a coffee machine, which aims at solving the technical problems that the coarse and fine adjustment and the weight of a fed bean are difficult to monitor in real time and return to zero, and the gear selection of a coarse and fine adjustment mechanism is difficult to automatically adjust through a key. A conical cutter adjusting disc of the mechanism is meshed with a tooth opening in the position of an outer diameter gear ring of the conical cutter adjusting disc through a transmission gear at the position of a stepping motor on one side to drive the conical cutter adjusting disc to rotate and adjust a grinding gap between an upper conical cutter and a lower conical cutter, and the key points are that an arc-shaped convex point is arranged on one side of the outer diameter of the bottom of the conical cutter adjusting disc and triggers a microswitch when the conical cutter adjusting disc is located at a zero gear; the control panel is provided with a bean grinding gram number selection key, a thickness adjusting gear key, a corresponding powder amount return-to-zero key and a gear return-to-zero key, and the control panel controls the synchronous motor to rotate clockwise or anticlockwise through a program; the control panel is further provided with a weighing / gear display and a control program display, and the control program display comprises the number of grams corresponding to the thickness, the fineness and the zero.

Description

Technical Field

[0001] The utility model relates to a coffee bean grinding mechanism, which is a key-press type coffee machine precise weighing coarse and fine grinding mechanism. Background Art

[0002] A coffee machine is a fully automatic or semi-automatic appliance that integrates the entire process of brewing coffee, including grinding, pressing, filling, brewing, and removing dregs. Usually, when grinding coffee powder, it is necessary to adjust the coarseness of the grinding according to personal preference, especially drip coffee machines have higher requirements for the fineness of coffee bean grinding. The coarseness adjustment of this type of coffee machine is generally achieved through a knob on the machine body, such as the application number 202320048768.0 disclosed in the Chinese patent literature, the authorization announcement date 2023.06.23, and the utility model name "grinding device for drip coffee machine"; the grinding mechanism of this type of coffee machine, such as the application number 202110647506.1 disclosed in the Chinese patent literature, the application announcement date 2021.08.06, and the invention name "coffee grinder". However, it is difficult for the above-mentioned products and similar products to automatically reset the coarseness adjustment mechanism to zero and conduct real-time detection before restarting the machine after grinding. It is also difficult for the coarseness adjustment mechanism to automatically adjust the gear selection through buttons. It is difficult to monitor the corresponding grams and gears during the bean feeding and grinding process, and there is a lack of gear and powder amount reset button settings. Summary of the invention

[0003] To overcome the above shortcomings, the purpose of the utility model is to provide a button-type coffee machine with an accurate weighing and coarse and fine grinding mechanism to the art, so as to solve the technical problems of the existing similar products that it is difficult to automatically reset the coarse and fine adjustment mechanism to zero and conduct real-time detection before restarting the machine after grinding, the coarse and fine adjustment mechanism is difficult to automatically adjust the gear selection through buttons, the corresponding grams and gears of the beans and grinding process are difficult to monitor, and there is a lack of gear and powder amount reset buttons. The purpose is achieved through the following technical solutions.

[0004] A push-button coffee machine has an accurate weighing and coarse and fine grinding mechanism, which comprises a bean box assembly, a bean grinding assembly and a weighing module, wherein weighing sensors are respectively arranged in the weighing modules below the bean bin of the bean box assembly, and the bean sweeping gear in the bean bin of the bean box assembly is driven to rotate by the output shaft of the bottom synchronous motor to discharge the beans, and the coffee beans in the bean discharge process enter the grinding knife of the bean grinding assembly through the bean discharge channel of the bean grinding assembly to be ground, and the coffee beans are discharged through the powder discharge channel of the bean grinding assembly after being ground; the grinding knife comprises an upper conical knife assembly and a lower conical knife assembly, and a conical knife adjusting disk is arranged on the outer diameter of the lower conical knife assembly of the bean grinding assembly, and the conical knife adjusting disk is driven to rotate by meshing the tooth mouth of the outer diameter gear ring of the conical knife adjusting disk through the transmission gear at one side of the stepping motor, so as to drive the upper conical knife assembly in the conical knife adjusting disk to move up and down to adjust the grinding gap between the upper conical knife of the upper conical knife assembly and the lower conical knife of the lower conical knife assembly, and the lower conical knife in the lower conical knife assembly is driven to rotate by the bean grinding motor. The key points of its structural design are that an arc-shaped convex point is provided on one side of the bottom outer diameter of the cone blade adjustment disk, and the bean grinding assembly corresponding to the arc-shaped convex point is provided with at least one micro switch. The micro switch, stepper motor and weighing sensor of the weighing module are connected to the circuit board of the control panel through the line. The control panel is provided with a button for selecting the number of grams of ground beans and a button for adjusting the coarseness and fineness. The control panel controls the synchronous motor to rotate clockwise or counterclockwise through the program. When the arc-shaped convex point of the cone blade adjustment disk triggers one of the micro switches, the cone blade adjustment disk of the bean grinding assembly is located at zero gear. In the above structure, the stepper motor adjusts the rotation of the cone blade adjustment disk by forward and reverse rotation, so that the upper cone blade assembly in the cone blade adjustment disk moves up and down, and at the same time, adjusts the grinding gap between the upper cone blade of the upper cone blade assembly and the lower cone blade of the lower cone blade assembly, so as to adjust the coarseness and fineness of the coffee beans, and the button for automatically adjusting the coarseness and fineness during grinding. The coarseness and fineness can be set by using the coarseness and fineness adjustment buttons on the control panel. The stepper motor automatically drives the conical knife adjustment disk to rotate to the set coarseness and fineness, so that the stepper motor automatically changes the grinding coarseness and fineness through the transmission gear structure, and the program control can automatically adjust the coffee grinding coarseness required by the user. Existing similar products generally use a knob to set and adjust the coarseness and fineness.

[0005] The coarse and fine adjustment gear buttons of the control panel are provided with a gear reset button. Thus, the coarse and fine adjustment gear is automatically returned to the zero gear position by pressing the gear reset button, and the corresponding micro switch is triggered; or the gear reset button is omitted according to the following structural design, and the zero gear is automatically monitored and found through program control when the machine is turned on.

[0006] The control panel is provided with a weighing / gear position display and a control program display, wherein the control program display includes the grams corresponding to coarse, fine and zero. This facilitates real-time monitoring of the coarse and fine grinding state of the coffee beans and the grams of coarse and fine grinding, as well as the remaining grams, wherein the grams corresponding to zero are the remaining grams.

[0007] The adjustment angle range between the teeth of the outer diameter gear ring of the cone cutter adjustment disk is 85°, and the gear position changes by 3.4° each time the cone cutter adjustment disk is turned, for a total of 25 gears. The above structure is a specific gear ring ratio of an embodiment, and other gear ring ratios may also be used.

[0008] The transmission gear at the stepper motor includes a transmission gear 1 at the shaft of the stepper motor and a transmission gear 2 fixed to the bean grinding assembly. The transmission gear 1 is meshed with the teeth of the outer diameter gear ring of the cone knife adjustment disk through the transmission gear 2; the transmission gear 1 is arranged at 90 degrees through the central axis of the transmission gear 2 and the cone knife adjustment disk, and between the stepper motor and the horizontal motor of the bean grinding assembly.

[0009] The bean grinding assembly is provided with one or two symmetrical bean box assemblies above the bean grinding assembly, and the weighing modules are respectively arranged at the lower edge of the bean bin of the bean box assembly through the weighing module bracket. The above-mentioned double bean box assembly is arranged to accelerate the bean feeding speed and the bean storage and retrieval amount.

[0010] The utility model has reasonable structural design, compact structure, small volume, and convenient setting and zeroing of the coarseness and fineness of coffee bean grinding, the coarse and fine grinding amount, and the powder amount; it is suitable for use as a precise weighing and coarse and fine grinding mechanism for a push-button coffee machine, and a further improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure between the bottom internal transmission gear and the cone cutter adjustment disk of the utility model, and the dotted line in the figure is the external structure.

[0012] Figure 2 yes Figure 1 Schematic diagram of the bottom three-dimensional structure.

[0013] Figure 3 yes Figure 2 Schematic diagram of the cross-sectional structure in use status.

[0014] Figure 4 yes Figure 3 A schematic diagram of the structure of one of the bean grinding components in the bean-feeding state.

[0015] Figure 5 This is a schematic diagram of the weighing / gear position display and control program display usage status on the control panel of the utility model Figure 1 .

[0016] Figure 6 This is a schematic diagram of the weighing / gear position display and control program display usage status on the control panel of the utility model Figure 2 .

[0017] Serial numbers and names of the attached drawings: 1. Bean box assembly, 2. Bean grinding assembly, 3. Weighing module, 4. Cone knife adjustment disk, 5. Stepper motor, 6. Micro switch. DETAILED DESCRIPTION

[0018] Now, in conjunction with the accompanying drawings, the structure and use of the utility model are further described. Figure 1-Figure 6 As shown, the mechanism comprises a bean box assembly 1, a bean grinding assembly 2 and a weighing module 3. One or two bean box assemblies are arranged symmetrically above the bean grinding assembly. The weighing modules are respectively arranged at the lower edge of the bean bin of the bean box assembly through weighing module brackets. Weighing sensors are respectively arranged in the weighing modules below the bean bin of the bean box assembly. The bean sweeping gear in the bean bin of the bean box assembly is driven to rotate by the output shaft of the bottom synchronous motor to discharge the beans. The coffee beans in the bean discharge process enter the grinding knife of the bean grinding assembly through the bean discharge channel of the bean grinding assembly to be ground. After the coffee beans are ground, The powder is discharged through the powder outlet channel of the bean grinding assembly; the grinding knife includes an upper conical knife assembly and a lower conical knife assembly, and the outer diameter of the lower conical knife assembly of the bean grinding assembly is provided with a conical knife adjustment disk 4, and the conical knife adjustment disk is driven to rotate by meshing the tooth mouth of the outer diameter gear ring of the conical knife adjustment disk through the transmission gear at one side of the stepping motor 5, and the moving gear includes a transmission gear 1 and a transmission gear 2, which drives the upper conical knife assembly in the conical knife adjustment disk to move up and down to adjust the grinding gap between the upper conical knife of the upper conical knife assembly and the lower conical knife of the lower conical knife assembly, and the lower conical knife in the lower conical knife assembly is driven to rotate by the bean grinding motor. The bottom outer diameter side of the above-mentioned cone blade adjustment disk is provided with an arc-shaped convex point, and the bean grinding assembly corresponding to the arc-shaped convex point is provided with a micro switch 6. The micro switch, the stepper motor and the weighing sensor of the weighing module are connected to the circuit board of the control panel through a line. The control panel is provided with a grinding bean gram selection button and a coarse and fine adjustment gear button. The control panel controls the synchronous motor to rotate clockwise or counterclockwise through a program. When the arc-shaped convex point of the cone blade adjustment disk triggers the micro switch, the cone blade adjustment disk of the bean grinding assembly is located at the zero gear. The cone blade adjustment disk of the bean grinding assembly automatically monitors and searches for the zero gear through the stepper motor when the machine is turned on. The cone blade adjustment disk is adjusted to the finest position by the stepper motor and is set to the initial zero gear. A gear reset button is provided at the coarse and fine adjustment gear button of the control panel, and a powder amount reset button is provided at the grinding bean gram selection button of the control panel; the control panel is provided with a weighing / gear display and a control program display, and the control program display includes the grams corresponding to coarse, fine and zero.

[0019] The adjustment angle range between the teeth of the outer diameter gear ring of the above-mentioned cone knife adjustment disk is 85°, and the gear position of the cone knife adjustment disk changes by 3.4° each time the cone knife adjustment disk is rotated, with a total of 25 gears. The transmission gear at the stepper motor includes a transmission gear 1 at the shaft of the stepper motor, and a transmission gear 2 fixed to the bean grinding assembly, wherein the transmission gear 1 is meshed with the teeth of the outer diameter gear ring of the cone knife adjustment disk through the transmission gear 2; the transmission gear 1 is arranged at 90 degrees through the central axis of the transmission gear 2 and the cone knife adjustment disk, and between the stepper motor and the horizontal motor of the bean grinding assembly.

[0020] This mechanism is an intelligent coffee machine working mechanism that completes the entire process. It uses a stepper motor to drive the gear transmission structure to automatically change the grinding coarseness and fineness gear. It can automatically adjust the coffee grinding coarseness required by the user through program control alone, and record the weight of the coffee beans in the bean bin in real time.

[0021] When in use, put the upper cone blade assembly into the cone blade adjustment disk and then put the bean box assembly in. Rotate the cone blade adjustment disk 85° counterclockwise to adjust it to the finest position as the initial gear. Automatically monitor and find the zero gear when starting up. Then press the "coarse" and "fine" buttons on the screen to adjust the gear as needed. Press the "coarse" button, and the stepper motor starts to drive the transmission gear 1 to rotate clockwise, and the distance between the upper and lower cone blades begins to decrease. It also drives the transmission gear 2 and the cone blade adjustment disk to move counterclockwise. Each press rotates 3.4° counterclockwise for one gear, with a total of 25 gears. Similarly, press the "fine" button, and the distance between the upper and lower cone blades begins to increase by rotating counterclockwise in the opposite direction. The weight / gear display normally displays the weight, and the current gear will be displayed when adjusting the coarseness.

[0022] Select the required number of grams of coffee beans according to your needs, for example, 39g of coffee beans. Then, the program-controlled synchronous motor drives the bean-sweeping gear to put the beans in. At the same time, the coffee beans in the cavity are swept out from the notch on one side of the bottom of the bean box assembly. The swept coffee beans enter the powder-sweeping cavity of the grinder assembly, where they are ground while being put in. The horizontal motor drives the lower cone knife and the powder-sweeping gear to rotate, and the ground coffee powder is swept out by the powder-sweeping gear through the powder-sweeping channel and falls into the powder outlet channel. During the bean-putting process, the weighing module senses the weight change and displays the weight data change on the screen. After grinding, the weighing module displays the residual powder amount, and press the button to reset the powder amount to zero.

[0023] To sum up, after the existing similar coffee machine products are started, the gear position often does not return to zero, which is not conducive to user operation, so this mechanism adds a function; after the coffee machine with this mechanism is started, if the arc-shaped convex point on the cone blade adjustment disk does not touch the micro switch, the system defaults to not being in zero gear, and the stepper motor starts to drive the transmission gear to make the cone blade adjustment disk rotate clockwise until the arc-shaped convex point of the cone blade adjustment disk touches the micro switch, then stops working, and the gear position of the cone blade adjustment disk returns to zero.

Claims

1. A precise weighing and coarse and fine grinding mechanism for a key-operated coffee machine, the mechanism comprising a bean box assembly (1), a bean grinding assembly (2) and a weighing module (3), wherein weighing sensors are respectively arranged in the weighing modules below the bean bin of the bean box assembly, the bean sweeping gear in the bean bin of the bean box assembly is driven to rotate by the output shaft of the bottom synchronous motor to discharge the beans, the coffee beans in the bean discharge process enter the grinding knife of the bean grinding assembly through the bean discharge channel of the bean grinding assembly to be ground, and the coffee beans are discharged through the powder discharge channel of the bean grinding assembly after being ground; the grinding knife comprises an upper cone knife assembly and a lower cone knife assembly, the outer diameter of the lower cone knife assembly of the bean grinding assembly is provided with a cone knife adjustment disk (4), the cone knife adjustment disk is driven to rotate by meshing the tooth mouth of the outer diameter gear ring of the cone knife adjustment disk through the transmission gear at one side of the stepping motor (5), and drives the upper cone knife assembly in the cone knife adjustment disk to move up and down to adjust the grinding gap between the upper cone knife of the upper cone knife assembly and the lower cone knife of the lower cone knife assembly, and the lower cone knife in the lower cone knife assembly is driven to rotate by the bean grinding motor; characterized in that The conical blade adjustment disk (4) is provided with an arc-shaped convex point on one side of the outer diameter of the bottom, and the bean grinding assembly (2) corresponding to the arc-shaped convex point is provided with at least one micro switch (6). The micro switch, the stepping motor (5) and the weighing sensor of the weighing module (3) are connected to the circuit board of the control panel through a line. The control panel is provided with a grinding bean gram selection button and a coarseness adjustment gear button. When the control panel is rotated clockwise or counterclockwise by the synchronous motor, and the arc-shaped convex point of the conical blade adjustment disk triggers one of the micro switches, the conical blade adjustment disk of the bean grinding assembly is located at the zero gear.

2. The precise weighing and grinding mechanism of the push-button coffee machine according to claim 1, characterized in that A gear reset button is provided at the coarse and fine adjustment gear button of the control panel.

3. The precise weighing and grinding mechanism of the push-button coffee machine according to claim 1, characterized in that The control panel is provided with a weighing / gear position display and a control program display, and the control program display includes the grams corresponding to coarse, fine and zero.

4. The precise weighing and grinding mechanism of the push-button coffee machine according to claim 1, characterized in that The adjustment angle range between the teeth at the outer diameter gear ring of the cone cutter adjustment disk (4) is 85°, and the gear position changes by 3.4° each time the cone cutter adjustment disk is rotated, with a total of 25 gear positions.

5. The precise weighing and grinding mechanism of the push-button coffee machine according to claim 1, characterized in that The transmission gear at the stepper motor (5) comprises a transmission gear 1 at the shaft of the stepper motor and a transmission gear 2 fixed to the bean grinding assembly (2), wherein the transmission gear 1 is meshed with the teeth of the outer diameter gear ring of the cone blade adjustment disk through the transmission gear 2; the transmission gear 1 is arranged at 90 degrees through the central axis of the transmission gear 2 and the cone blade adjustment disk, and between the stepper motor and the horizontal motor of the bean grinding assembly.

6. The precise weighing and grinding mechanism of the push-button coffee machine according to claim 1, characterized in that One or two symmetrical bean box assemblies (1) are provided above the bean grinding assembly (2), and the weighing modules (3) are respectively arranged at the lower edges of the bean bins of the bean box assemblies via weighing module brackets.

Images