A coffee grinder scale adjustment structure

Abstract

This utility model relates to the field of coffee grinder technology, specifically disclosing a coffee grinder scale adjustment structure, including a housing mounted on a frame, a grinding motor, and a scale adjustment motor. A grinding chamber is mounted on the housing, and an upper and lower blade disc are disposed within the grinding chamber. The grinding motor is connected to a rotating spindle via a flexible coupling, and the rotating spindle is drive-connected to the lower blade disc. A bearing seat is threaded onto the inner side of the housing, and a rotating gear, drive-connected to the scale adjustment motor, is mounted at the bottom of the bearing seat. A bearing assembly is mounted on the outer side of the rotating spindle, and the bearing assembly is mounted on the inner side of the bearing seat. This utility model achieves rapid and precise adjustment of the scale for different coffee beans by using a scale adjustment motor to drive the rotating gear for electric scale adjustment. Furthermore, the flexible coupling separates the rotating spindle from the grinding motor, reducing the vibration impact of the grinding motor, preventing axial and radial movement, and improving grinding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinder technology, and in particular to a coffee grinder scale adjustment structure. Background Technology

[0002] A coffee grinder typically consists of a separate grinder body, a grinding chamber, and a powder cup. The grinder body and grinding chamber are detachably connected. The grinder body contains the main unit, and the grinding chamber contains the grinding mechanism. The main unit and the grinding mechanism are connected by a drive. After the grinder body is connected to the grinding chamber, it is used to grind coffee beans into powder in the grinding chamber. The powder cup is placed below the grinding chamber to collect the powder.

[0003] A search revealed that Chinese utility model patent CN202321990704.9 discloses a top-feed coffee grinder, relating to the field of coffee grinder technology. It solves the technical problem of existing coffee grinders having a small bean capacity, where increasing the bean capacity leads to an increase in grinder size. This top-feed coffee grinder includes a grinder body and a grinding chamber. The first end of the grinder body and the grinding chamber are detachably connected. A cover is provided at the second end of the grinder body opposite the first end, covering the grinder body. A feed channel runs through the grinder body from the second end to the first end. This utility model provides a top-feed coffee grinder that can increase the bean capacity while reducing the grinder size.

[0004] For example, Chinese utility model patent application CN202320237198.X discloses a coffee grinder and its scale calibration structure, including: an outer grinding disc; a central shaft, on which an inner grinding disc is sleeved, and one end of the central shaft has a threaded end; an adjustment component, which is disposed on the threaded end of the central shaft and is used to change the distance between the inner and outer grinding discs; a calibration component, which is used to calibrate the adjustment component and is disposed outside the adjustment component; and a limiting component, which is used to limit the calibration component. By adjusting the inner and outer grinding discs to their tightest position using a knob, it is easy to confirm the minimum grinding disc position. Rotating the movable digital dial aligns the scale on the movable digital dial with the arrow on the knob, aligning the tightness between the inner and outer grinding discs with the numbers on the movable digital dial, thus calibrating the coffee grinder's scale and facilitating its normal use.

[0005] While the existing coffee grinders mentioned above can meet basic usage needs, they all rely on manual adjustment of the grinding coarseness, making it impossible to quickly and accurately adjust the grinding scale for different types of beans. Furthermore, there is axial and radial movement between the motor and the grinding head, which affects the particle size distribution of the powder and reduces grinding efficiency. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a scale adjustment structure for a coffee grinder, which addresses the above-mentioned deficiencies of the prior art. By setting a scale adjustment motor to drive the rotating gear for electric adjustment of the scale, it can achieve rapid and accurate adjustment of the scale for different beans. Furthermore, by setting an elastic coupling to separate the rotating spindle from the grinding motor, it reduces the vibration of the grinding motor, avoids axial and radial movement, and improves grinding efficiency.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0008] A grinder with adjustable scale includes a housing mounted on a frame, a grinding motor, and a scale adjustment motor. A grinding chamber is mounted on the housing, and an upper and lower blade disc are disposed within the grinding chamber. The grinding motor is connected to a rotating spindle via a flexible coupling. The rotating spindle is drively connected to the lower blade disc. A bearing seat is threaded onto the inner side of the housing. A rotating gear, drively connected to the scale adjustment motor, is mounted on the bottom of the bearing seat. A bearing assembly is mounted on the outer side of the rotating spindle, and the bearing assembly is mounted on the inner side of the bearing seat.

[0009] Preferably, the output end of the scale adjustment motor is connected to a worm gear, which meshes with the outer side of the rotating gear.

[0010] Preferably, the outer peripheral wall of the bearing housing is provided with an external thread, and the inner peripheral wall of the housing is provided with an internal thread that matches the external thread.

[0011] Preferably, the flexible coupling includes a main shaft connecting part, a rubber buffer part, and a motor connecting part. The rubber buffer part is installed between the main shaft connecting part and the motor connecting part. The main shaft connecting part is slidably engaged with the motor connecting part by a snap-fit ​​foot. The main shaft connecting part and the motor connecting part are respectively connected to the output ends of the rotating main shaft and the grinding motor.

[0012] Preferably, a bean-picking disc is installed at the upper end of the rotating spindle, and the bean-picking disc is located at the upper end of the lower blade disc.

[0013] Preferably, an upper tool holder and a lower tool holder are provided on the inner side of the grinding cavity, and the upper tool disc and the lower tool disc are respectively mounted on the upper tool holder and the lower tool holder.

[0014] The coffee grinder scale adjustment structure provided by this utility model, using the above technical solution, has the following beneficial effects: The grinding chamber of this coffee grinder scale adjustment structure is equipped with an upper blade and a lower blade. The grinding motor is connected to a rotating spindle via a flexible coupling. The rotating spindle is drively connected to the lower blade. A bearing seat is threaded onto the inner side of the outer casing. A rotating gear, drively connected to the scale adjustment motor, is installed at the bottom of the bearing seat. A bearing assembly is installed on the outer side of the rotating spindle, and the bearing assembly is installed on the inner side of the bearing seat. The scale adjustment motor drives the rotating gear for electric adjustment of the scale. When the gear rotates, it drives the bearing housing to rotate. The bearing housing moves up and down under the action of the threaded connection of the outer shell, which in turn drives the bearing assembly and the rotating main shaft to move up and down. Finally, it drives the lower cutter disc to move up and down, thereby adjusting the distance between the lower cutter disc and the upper cutter disc, so as to achieve quick and accurate adjustment of different bean scales and adapt to beans of different sizes. In addition, by setting a flexible coupling to separate the rotating main shaft from the grinding motor, the vibration of the grinding motor during operation is buffered, reducing the impact of the grinding motor vibration, avoiding axial and radial movement, improving the concentration of powder particle size, and thus improving grinding efficiency. The grinding efficiency is relatively high. Attached Figure Description

[0015] Figure 1 This is an exploded view of the present invention;

[0016] Figure 2 This is an exploded view of the present invention from another angle;

[0017] Figure 3 This is a perspective view of the present utility model;

[0018] Figure 4 This is a perspective view of the present invention from another angle;

[0019] Figure 5 This is a longitudinal sectional view of the present invention;

[0020] In the diagram, 1-frame, 2-outer shell, 3-grinding motor, 4-scale adjustment motor, 5-grinding chamber, 6-upper blade, 7-lower blade, 8-flexible coupling, 9-rotating spindle, 10-bearing seat, 11-rotating gear, 12-bearing assembly, 13-worm gear, 14-spindle connection, 15-rubber buffer, 16-motor connection, 17-clamping foot, 18-bean-picking disc, 19-upper blade holder, 20-lower blade holder. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] like Figure 1-5 As shown, the grinder's scale adjustment structure includes a frame 1, a housing 2 mounted on the frame 1, a grinding motor 3, and a scale adjustment motor 4. A grinding chamber 5 is mounted on the housing 2, and an upper blade 6 and a lower blade 7 are arranged inside the grinding chamber 5. The grinding motor 3 is connected to a rotating spindle 9 via a flexible coupling 8. The rotating spindle 9 is driven by the lower blade 7. A bearing seat 10 is threadedly connected to the inner side of the housing 2. A rotating gear 11, which is driven by the scale adjustment motor 4, is mounted on the bottom of the bearing seat 10. A bearing assembly 12 is mounted on the outer side of the rotating spindle 9 and is installed inside the bearing seat 10. It is understandable that the grinding motor 3 and the scale adjustment motor 4 can both be general-purpose servo motors, etc. The upper cutter disc 6 and the lower cutter disc 7 can both be equipped with grinding teeth. During grinding, the grinding motor 3 drives the elastic coupling 8 to rotate, which in turn drives the rotating spindle 9 to rotate, and then drives the lower cutter disc 7 to rotate, thereby grinding the beans that fall between the lower cutter disc 7 and the upper cutter disc 2. This utility model adopts an electric scale adjustment method, which can realize the rapid and accurate adjustment of different bean scales. Moreover, the entire adjustment main structure is machined using a lathe, which can achieve better concentricity and flatness from the machining perspective.

[0025] Specifically, the output end of the scale adjustment motor 4 is connected to a worm gear 13, which meshes with the outer side of the rotating gear 11. The rotating gear 11 can be a worm wheel or similar, used to cooperate with the worm gear 13 for transmission. The outer peripheral wall of the bearing seat 10 is provided with an external thread, and the inner peripheral wall of the outer casing 2 is provided with an internal thread that matches the external thread. The flexible coupling 8 includes a main shaft connecting part 14, a rubber buffer part 15, and a motor connecting part 16. The rubber buffer part 15 is installed between the main shaft connecting part 14 and the motor connecting part 16. The main shaft connecting part 14 is slidably engaged with the motor connecting part 16 through a snap-fit ​​foot 17. The motor connection part 16 is connected to the output end of the rotating main shaft 9 and the grinding motor 3 respectively. The flexible coupling 8 can realize transmission while having axial displacement, that is, the main shaft connection part 14 can move up or down relative to the motor connection part 16, with a movement stroke of 3mm, thereby driving the rotating main shaft 9 to move up or down, while the rotation is not affected by the bearing assembly 12. The upper end of the rotating main shaft 9 is equipped with a bean-picking disc 18, which is located at the upper end of the lower blade disc 7. The inner side of the grinding cavity 5 is provided with an upper blade holder 19 and a lower blade holder 20, and the upper blade disc 6 and the lower blade disc 7 are respectively installed on the upper blade holder 19 and the lower blade holder 20. Understandably, by setting the scale adjustment motor 4 to drive the rotating gear 11 to electrically adjust the scale, the rotating gear 11 drives the bearing seat 10 to rotate. The bearing seat 10 moves up and down under the action of the threaded connection of the outer shell 2, which in turn drives the bearing assembly 12 and the rotating main shaft 9 to move up and down, and finally drives the lower cutter disc 7 to move up and down, thereby adjusting the distance between the lower cutter disc 7 and the upper cutter disc 6 to control the grinding particle size of the beans and achieve rapid and accurate adjustment of different bean scales.

[0026] Understandably, this utility model has a reasonable design and unique structure, which can realize rapid and accurate adjustment of different bean scales and can adapt to beans of different sizes. Furthermore, the rotating main shaft 9 and the grinding motor 3 adopt a separate design, and the elastic coupling 8 can buffer the vibration of the grinding motor 3 during operation. The use of combined angular contact bearings reduces the impact of vibration of the grinding motor 3, avoids axial and radial movement, improves the concentration of powder particle size, and thus improves grinding efficiency, resulting in high grinding efficiency.

[0027] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A scale adjustment structure for a coffee grinder, characterized in that: The device includes a housing mounted on a frame, a grinding motor, and a scale adjustment motor. A grinding chamber is mounted on the housing, and an upper cutter disc and a lower cutter disc are disposed within the grinding chamber. The grinding motor is connected to a rotating spindle via a flexible coupling, and the rotating spindle is drivenly connected to the lower cutter disc. A bearing seat is threadedly connected to the inner side of the housing, and a rotating gear drivenly connected to the scale adjustment motor is mounted on the bottom of the bearing seat. A bearing assembly is mounted on the outer side of the rotating spindle, and the bearing assembly is mounted on the inner side of the bearing seat.

2. The grinder scale adjustment structure according to claim 1, characterized in that: The output end of the scale adjustment motor is connected to a worm gear, which meshes with the outer side of the rotating gear.

3. The grinder scale adjustment structure according to claim 1, characterized in that: The outer peripheral wall of the bearing housing is provided with an external thread, and the inner peripheral wall of the housing is provided with an internal thread that matches the external thread.

4. The grinder scale adjustment structure according to claim 1, characterized in that: The flexible coupling includes a main shaft connecting part, a rubber buffer part, and a motor connecting part. The rubber buffer part is installed between the main shaft connecting part and the motor connecting part. The main shaft connecting part is slidably engaged with the motor connecting part by a snap-fit ​​foot. The main shaft connecting part and the motor connecting part are respectively connected to the output ends of the rotating main shaft and the grinding motor.

5. The grinder scale adjustment structure according to claim 1, characterized in that: A bean-picking disc is mounted on the upper end of the rotating spindle, and the bean-picking disc is located above the lower cutter disc.

6. The grinder scale adjustment structure according to claim 1, characterized in that: The grinding chamber is provided with an upper tool holder and a lower tool holder on its inner side, and the upper tool disc and the lower tool disc are respectively mounted on the upper tool holder and the lower tool holder.

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