A bean grinder

Abstract

The utility model provides a kind of bean grinder, by bean bin, grinding shell body and be set on base main shell and powder bin are composed, bean bin, grinding shell body and main shell are sequentially arranged, motor and main control circuit board are set in main shell, the output end of motor is connected with the lower end of a driving shaft, driving shaft drives the work of grinding knife group in grinding shell body;Driving shaft lower side is installed in grinding shell body by a group of bearings, the upper end of driving shaft is installed on the bean bin seat block in bean bin by another bearing.Driving shaft is connected to motor after the lower end and is installed in grinding shell body by a group of bearings, the upper end of driving shaft extends to bean bin and is installed in bean bin seat block by another bearing, bean bin, bean bin seat block, grinding shell body are on same central axis, three bearings are also on same central axis, so that driving shaft forms three-point concentric positioning on axis, maximum limit reduces the jitter offset.

Description

Technical Field

[0001] This utility model belongs to the technical field of coffee grinders, and specifically relates to a coffee grinder. Background Technology

[0002] Coffee, as one of the world's three major beverages, is a well-known drink with a long history and is increasingly accepted by consumers. To enjoy freshly brewed coffee, equipment such as coffee grinders is indispensable. Coffee grinders play a crucial role in coffee making, primarily grinding coffee beans through their grinding components. Generally, they utilize flat or conical burr grinding discs, where the relative rotation of two discs compresses and shears the coffee beans between the discs, grinding them into powder.

[0003] The grinding assembly typically consists of inner and outer grinding blades. A motor drives the inner grinding blade to rotate within the outer grinding blade via a drive shaft. For example, CN215838517U discloses a small coffee bean grinder that uses a motor installed in the base to drive the upper blade disc to rotate, while the lower blade disc is fixed. A connecting channel is formed between the upper and lower blade discs, allowing for the rapid extraction of ground coffee powder. The gap between the upper and lower blade discs can be adjusted by adjusting the gap between the adjusting body and the base to adjust the grind size to meet different needs. Because the coffee beans are squeezed and ground into coffee powder between the inner and outer grinding blades, and one end of the motor-driven drive shaft drives the inner grinding blade, while the other end of the drive shaft is suspended, the drive shaft experiences radial pressure, resulting in radial offset. This causes a large radial displacement of the drive shaft during rotation, affecting the uniformity of the coffee powder's coarseness and generating significant noise. Utility Model Content

[0004] The purpose of this invention is to propose a coffee grinder that addresses the technical problem of radial pressure on the drive shaft causing radial slippage, resulting in significant radial displacement of the drive shaft during rotation, which affects the uniformity of coffee powder coarseness.

[0005] The technical solution of this utility model is implemented as follows:

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A coffee grinder comprises a bean hopper, a grinding housing, a main housing and a powder hopper mounted on a base. The bean hopper, the grinding housing, and the main housing are arranged sequentially. A motor and a main control circuit board are housed inside the main housing. The output end of the motor is connected to the lower end of a drive shaft, which drives the grinding blade assembly inside the grinding housing. The lower side of the drive shaft is mounted inside the grinding housing via a set of bearings, and the upper end of the drive shaft is mounted on a bean hopper seat block inside the bean hopper via another bearing.

[0008] Specifically, the bean hopper seat block includes a bean hopper seat plate that fits against the bottom of the bean hopper. The bean hopper seat plate is provided with a number of positioning support blocks. The positioning support blocks are located on the central axis, and the bearing is installed in the positioning support blocks.

[0009] Furthermore, the upper end of the main housing is connected to the lower end of the grinding housing, and the lower part of the main housing is provided with the main control circuit board and power supply devices and switch control devices connected to the main control circuit board; the upper part of the main housing is provided with the motor through a motor mounting base, the motor is connected to the main control circuit board, and the output end of the motor passes through the motor mounting base and is connected to the lower end of the drive shaft.

[0010] Furthermore, a grinding blade assembly is provided inside the grinding housing, an adjusting pressure ring is provided on the upper side of the grinding blade assembly, and a powder scraper and a grinding base plate are provided on the lower side of the grinding blade assembly.

[0011] Specifically, the grinding blade assembly consists of an outer grinding blade and an inner grinding blade. The powder scraper, the inner grinding blade, and the drive shaft are fixedly connected to each other. The drive shaft is mounted on the bearing seat of the grinding housing via a set of bearings.

[0012] Furthermore, the upper end of the grinding housing and the lower end of the bean hopper are connected by an adjusting connecting thread. The outer grinding blade is provided with multiple spring support parts in the circumferential direction. A return spring is provided between the spring support parts and the spring mounting seat at the upper end of the grinding housing. The bottom of the bean hopper block is pressed and limited to the outer grinding blade in the spring mounting seat in the vertical direction by the adjusting pressure ring.

[0013] Furthermore, a scale groove is provided at the lower end of the bean hopper, and a number of elastic beads are provided at the upper end of the grinding shell corresponding to the scale groove. The elastic beads are radially engaged with the scale groove and move vertically as the adjusting connecting thread rotates, compressing the vertical height of the return spring to adjust the gap between the outer grinding blade and the inner grinding blade.

[0014] Furthermore, a powder outlet is provided on one side of the grinding housing through a powder outlet mounting hole. The inner groove of the powder outlet is radially connected to the powder scraper block. The powder hopper is provided on the lower side of the powder outlet and is arranged side by side with the main housing.

[0015] Specifically, the upper end of the powder dispensing component is provided with several spring rods in the powder dispensing mounting hole, so that the powder dispensing component can be vertically reset and moved within the powder dispensing mounting hole.

[0016] Specifically, several sets of magnetic components are provided between the powder hopper and the base, and the powder hopper is detachably mounted on the base by magnetic attraction.

[0017] After adopting the above technical solution, the beneficial effects of this utility model are:

[0018] In this embodiment of the coffee grinder, the lower end of the drive shaft is connected to the motor and then mounted on the grinding housing via a set of bearings. The upper end of the drive shaft extends to the bean hopper and is mounted in the bean hopper seat block via another bearing. The bean hopper, bean hopper seat block, and grinding housing are on the same central axis, and the three bearings are also on the same central axis, thereby enabling the drive shaft to be concentrically positioned at three points on the axis, minimizing vibration and offset. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the coffee grinder according to an embodiment of the present utility model;

[0021] Figure 2 This is a top view of the overall structure of the coffee grinder according to an embodiment of the present utility model;

[0022] Figure 3 This is a cross-sectional view AA of the coffee grinder according to an embodiment of the present utility model;

[0023] Figure 4 This is a cross-sectional view of the coffee grinder BB according to an embodiment of the present utility model;

[0024] Figure 5 A three-dimensional exploded view of the coffee grinder part involved in the embodiment of this utility model. Figure 1 ;

[0025] Figure 6 A three-dimensional exploded view of the coffee grinder part involved in the embodiment of this utility model. Figure 2 ;

[0026] Among them, 10-main housing, 11-motor, 12-main control circuit board, 13-motor mounting base, 14-power supply device, 15-switch control device;

[0027] 20-Grinding housing, 201-Spring mounting base, 202-Bearing housing, 203-Powder outlet mounting hole, 21-Adjusting connection thread, 22-Adjusting pressure ring, 23-Outer grinding blade, 231-Spring support, 24-Inner grinding blade, 25-Reset spring, 26-Elastic ball, 27-Locking nut, 28-Powder scraper block, 29-Grinding base plate, 210-Drive shaft, 211-Powder outlet component, 212-Spring pull rod, 213-Bearing;

[0028] 30-Bean bin, 301-Scale groove, 31-Bean bin cover, 32-Bean bin seat block, 321-Bean bin seat plate, 322-Positioning mounting block, 323-Positioning support;

[0029] 40-Powder container; 50-Base; 51-Magnetic attachment. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0031] like Figure 1-6 As shown, this utility model embodiment provides a coffee grinder, which consists of a bean hopper 30, a grinding shell 20, a main shell 10 and a powder hopper 40 disposed on a base 50. The bean hopper 30, the grinding shell 20 and the main shell 10 are arranged in sequence. The main shell 10 is provided with a motor 11 and a main control circuit board 12. The output end of the motor 11 is connected to the lower end of a drive shaft 210. The drive shaft 210 drives the grinding blade assembly in the grinding shell 20 to work. The lower side of the drive shaft 210 is mounted in the grinding shell 20 through a set of bearings 213, and the upper end of the drive shaft 210 is mounted on the bean hopper seat block 32 in the bean hopper 30 through another bearing 213.

[0032] In use, the lower end of the drive shaft 210 is connected to the motor 11 and then mounted on the grinding housing 20 through a set of bearings 213. The upper end of the drive shaft 210 extends to the bean hopper 30 and is mounted in the bean hopper seat block 32 through another bearing 213. The bean hopper 30, the bean hopper seat block 32, and the grinding housing 20 are on the same central axis, and the three bearings 213 are also on the same central axis, so that the drive shaft 210 forms a three-point concentric positioning on the axis, minimizing vibration and offset.

[0033] Specifically, the bean hopper seat block 32 includes a bean hopper seat plate 321 that fits against the bottom of the bean hopper 30. The bean hopper seat plate 321 is provided with a positioning mounting block 322 by a plurality of positioning supports 323. The positioning mounting block 322 is located on the central axis, and the bearing 213 is installed in the positioning mounting block 322.

[0034] When in use, coffee beans are placed into the bean hopper 30, and then fall from between the positioning supports 323 into the center hole of the bean hopper base plate 321 before entering the grinding blade assembly.

[0035] like Figure 3 , 4 As shown, the upper end of the main housing 10 is connected to the lower end of the grinding housing 20. The lower part of the main housing 10 is provided with the main control circuit board 12 and the power supply device 14 and the switch control device 15 connected to the main control circuit board 12. The motor 11 is mounted on the upper part of the main housing 10 through a motor mounting base 13. The motor 11 is connected to the main control circuit board 12. The output end of the motor 11 passes through the motor mounting base 13 and is connected to the lower end of the drive shaft 210.

[0036] like Figure 5 , 6 As shown, a grinding blade assembly is provided inside the grinding housing 20. An adjusting pressure ring 22 is provided on the upper side of the grinding blade assembly, and a powder scraper 28 and a grinding base plate 29 are provided on the lower side of the grinding blade assembly.

[0037] Specifically, the grinding blade assembly consists of an outer grinding blade 23 and an inner grinding blade 24. The powder scraper block 28, the inner grinding blade 24, and the drive shaft 210 are fixedly connected to each other. The drive shaft 10 is mounted on the bearing seat 202 of the grinding housing 20 via a set of bearings 213. Specifically, the inner grinding blade 24 is fixed to the drive shaft 210 by a locking nut 27. The powder scraper block 28, the inner grinding blade 24, and the drive shaft 210 are connected by keyways, pins, or other means.

[0038] In use, coffee beans in the bean hopper 30 fall into the gap between the outer grinding blade 23 and the inner grinding blade 24. The drive shaft 210 drives the inner grinding blade 24 and the scraper block 28 to rotate. The coffee beans are ground into coffee powder by the outer grinding blade 23 and the inner grinding blade 24. The coffee powder falls into the grinding plate 29 on the lower side of the grinding blade assembly. The scraper block 28 scrapes the coffee powder in the grinding plate 29 to the powder outlet.

[0039] Specifically, the upper end of the grinding housing 20 and the lower end of the bean hopper 30 are connected by an adjusting connecting thread 21. The outer grinding blade 23 is circumferentially provided with multiple spring support portions 231. A return spring 28 is provided between the spring support portions 231 and the spring mounting seat 201 at the upper end of the grinding housing 20. The bottom of the bean hopper seat block 32 is vertically pressed and confined within the spring mounting seat 201 by the adjusting pressure ring 22. The lower end of the bean hopper 30 is also provided with a scale groove 301. Corresponding to the scale groove 301, several elastic beads 26 are provided at the upper end of the grinding housing 20. The elastic beads 26 radially engage with the scale groove 301 and move vertically as the adjusting connecting thread 21 rotates, compressing the vertical height of the return spring 25 to adjust the gap between the outer grinding blade 23 and the inner grinding blade 24.

[0040] In use, turn the bean hopper 30 to rotate it relative to the grinding housing 20. Adjust the connecting thread 21 to engage with it. The scale groove 301 and the elastic ball 26 mark the adjustment scale. Adjust the pressure ring 22 to squeeze the outer grinding blade 23, which in turn squeezes the return spring 25. This causes the outer grinding blade 23 to move vertically within the spring mounting seat 201. The inner grinding blade 24 remains vertically positioned within the grinding housing 20. As the outer grinding blade 23 moves vertically, the gap between the outer grinding blade 23 and the inner grinding blade 24 changes, thereby adjusting the coarseness of the coffee powder.

[0041] like Figure 3 , 6 As shown, a powder outlet 211 is provided on one side of the grinding housing 20 through a powder outlet mounting hole 203. The inner groove of the powder outlet 211 is radially connected to the powder scraper block 28. The powder hopper 40 is provided on the lower side of the powder outlet 211. The powder hopper 40 is arranged side by side with the main housing 10.

[0042] Specifically, the upper end of the powder dispensing component 211 is provided with several spring rods 212 in the powder dispensing mounting hole 203, so that the powder dispensing component 211 can be vertically reset and moved within the powder dispensing mounting hole 203.

[0043] Specifically, a number of magnetic components 51 are provided between the powder hopper 40 and the base 50, and the powder hopper 40 is detachably mounted on the base 50 by magnetic attraction.

[0044] Optionally, the bean hopper 30 is also provided with a bean hopper cover 31, which is used to add coffee beans.

[0045] In this embodiment of the coffee grinder, the lower end of the drive shaft is connected to the motor and then mounted on the grinding housing via a set of bearings. The upper end of the drive shaft extends to the bean hopper and is mounted in the bean hopper seat block via another bearing. The bean hopper, bean hopper seat block, and grinding housing are on the same central axis, and the three bearings are also on the same central axis, thereby enabling the drive shaft to be concentrically positioned at three points on the axis, minimizing vibration and offset.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A coffee grinder, characterized in that, It consists of a bean hopper, a grinding housing, a main housing and a powder hopper mounted on a base. The bean hopper, the grinding housing and the main housing are arranged in sequence. The main housing contains a motor and a main control circuit board. The output end of the motor is connected to the lower end of a drive shaft. The drive shaft drives the grinding blade assembly inside the grinding housing. The lower side of the drive shaft is mounted inside the grinding housing through a set of bearings, and the upper end of the drive shaft is mounted on the bean hopper seat block inside the bean hopper through another bearing.

2. The coffee grinder as described in claim 1, characterized in that, The bean hopper seat block includes a bean hopper seat plate that fits against the bottom of the bean hopper. The bean hopper seat plate is provided with a number of positioning support blocks. The positioning support blocks are located on the central axis, and the bearing is installed in the positioning support blocks.

3. The coffee grinder as described in claim 1, characterized in that, The upper end of the main housing is connected to the lower end of the grinding housing. The lower part of the main housing is provided with the main control circuit board and power supply devices and switch control devices connected to the main control circuit board. The motor is mounted on the upper part of the main housing through a motor mounting base. The motor is connected to the main control circuit board. The output end of the motor passes through the motor mounting base and is connected to the lower end of the drive shaft.

4. The coffee grinder as described in claim 3, characterized in that, The grinding housing is equipped with a grinding blade assembly, an adjusting pressure ring is provided on the upper side of the grinding blade assembly, and a powder scraper and a grinding base plate are provided on the lower side of the grinding blade assembly.

5. The coffee grinder as described in claim 4, characterized in that, The grinding blade assembly consists of an outer grinding blade and an inner grinding blade. The powder scraper, the inner grinding blade, and the drive shaft are fixedly connected to each other. The drive shaft is mounted on the bearing seat of the grinding housing via a set of bearings.

6. The coffee grinder as described in claim 5, characterized in that, The upper end of the grinding housing and the lower end of the bean hopper are connected by an adjusting threaded connection. The outer grinding blade is provided with multiple spring support parts in the circumferential direction. A return spring is provided between the spring support parts and the spring mounting seat at the upper end of the grinding housing. The bottom of the bean hopper block is pressed and limited to the outer grinding blade in the spring mounting seat in the vertical direction by the adjusting pressure ring.

7. The coffee grinder as described in claim 6, characterized in that, The lower end of the bean hopper is also provided with a scale groove, and a number of elastic beads are provided on the upper end of the grinding shell corresponding to the scale groove. The elastic beads are radially engaged with the scale groove and move vertically as the adjusting connecting thread rotates, compressing the vertical height of the reset spring to adjust the gap between the outer grinding blade and the inner grinding blade.

8. The coffee grinder as described in claim 4, characterized in that, A powder outlet is provided on one side of the grinding housing through a powder outlet mounting hole. The inner groove of the powder outlet is radially connected to the powder scraper block. The powder hopper is provided on the lower side of the powder outlet and is arranged side by side with the main housing.

9. The coffee grinder as described in claim 8, characterized in that, The upper end of the powder dispensing component is provided with several spring rods in the powder dispensing mounting hole, so that the powder dispensing component can be vertically reset and moved within the powder dispensing mounting hole.

10. The coffee grinder as described in claim 1, characterized in that, Several sets of magnetic attachments are provided between the powder hopper and the base, and the powder hopper can be detachably mounted on the base by magnetic attachment.

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