CN111759178A - Grinding mechanism of a coffee machine - Google Patents

Abstract

A grinding mechanism of a coffee machine is characterized in that: it comprises a casing and a funnel for loading coffee beans on the upper part of the casing, an installation area is arranged inside the casing, a grinding device is installed in the installation area, and an outlet opened at the lower end of the funnel is provided. The bean port is connected to the grinding area of the grinding device, and the driving mechanism drives the grinding device to grind the coffee beans located in the grinding area, and sweeps them to the outside of the powder outlet through the cleaner; wherein, the grinding device includes an axially movable installation The fixed grinding disc and the movable grinding disc are installed in the installation area. The fixed grinding disc is sleeved outside the movable grinding disc. The opposite surfaces of the two grinding discs are respectively provided with fixed grinding teeth and movable grinding teeth. A grinding area is formed between the fixed grinding teeth and the movable grinding teeth. . The beneficial effects of the present invention are: The drive shaft of the motor is set perpendicular to the rotation center of the grinding wheel, so the motor does not need to be installed under the grinding wheel, which is conducive to the arrangement of the powder outlet and avoids the phenomenon of residual coffee powder in the powder bin.

Description

Grinding mechanism of a coffee machine

technical field

The invention relates to a coffee machine, in particular to a grinding mechanism of the coffee machine.

Background technique

Coffee is a beverage made from roasted and ground coffee beans. As one of the three major beverages in the world, it is the main beverage popular in the world along with cocoa and tea. With the improvement of living standards, coffee has gradually become a common drink in people's lives. Coffee brewed with freshly ground coffee powder has a stronger aroma and better taste than coffee brewed with commercially available coffee powder, so people increasingly prefer to use a coffee machine to brew their own coffee and adjust the coffee according to their own preferences. taste.

During the grinding process of the existing coffee machine, there is a disadvantage that the thickness of the coffee powder is fixed: the gap of the grinding mechanism is a fixed size, resulting in the same size of the ground coffee powder, and it is difficult for users to adjust the thickness of the coffee powder according to different people. There are different requirements for convenient adjustment, so that the grinding effect of the coffee machine is relatively simple. Even after the coffee machine is used for a period of time, the grinding mechanism will increase the gap due to wear and tear, and the particles of the ground coffee powder will also become relatively large. , which affects its quality. In addition, due to the difference in growth and variety of the prototype coffee beans of coffee powder, there will be coffee beans with different diameters. Different coffee beans require different coffee powder diameters. Some coffee machines do not have an adjustment function. In addition, in the existing grinding mechanism, the main shaft of the motor is mostly arranged in parallel with the rotation axis of the grinding wheel. Therefore, the motor must be arranged below the grinding wheel, resulting in the large size of the coffee machine, which is not conducive to ordinary household use. Therefore, it is necessary to its further improvement.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the shortcomings of the prior art, provide a simple and compact structure, convenient and quick adjustment operation, users can adjust the thickness of coffee according to their needs, which is conducive to the development of the coffee machine in the direction of miniaturization, so as to be suitable for families The grinding mechanism of a coffee machine.

The object of the present invention is achieved in the following manner: a grinding mechanism for a coffee machine, characterized in that: it comprises a casing and a funnel for loading coffee beans on its upper part, the casing is provided with an installation area inside, and the installation area is installed There is a grinding device, the bean outlet opened at the lower end of the funnel is connected to the grinding area of the grinding device, and the driving mechanism drives the grinding device to grind the coffee beans located in the grinding area, and sweeps them out of the powder outlet through a cleaner;

Wherein, the grinding device includes a fixed grinding disc installed in the installation area in an axially movable type, and a movable grinding disc installed in a rotary type. The grinding area is formed between the fixed grinding teeth and the movable grinding teeth;

The outer periphery of the fixed grinding disc is provided with an adjusting device. The adjusting device includes an adjusting gear sleeved on the outer periphery of the fixed grinding disc. The lower end of the adjusting gear is coaxially fixed with an inner thread cylinder ring. The lower end of the connecting seat protrudes from its body to form several adjusting rods, the adjusting teeth protruding from the outer end of the adjusting rod are screwed with the internal thread of the internal thread cylinder ring, and the adjusting gear is rotated, and the connecting seat drives the fixed grinding disc along the The axial direction of the inner thread cylinder ring moves up and down, so as to adjust the axial relative position between the fixed grinding disc and the movable grinding disc;

Wherein, the drive mechanism includes a bearing seat at the bottom of the installation area, the drive shaft of the movable grinding disc is rotatably installed in the bearing seat, the bottom of the drive shaft is provided with a worm wheel, a worm screw sleeved on the motor drive shaft of the drive motor, the worm wheel and the The worms are meshed with each other, and the drive motor drives the rotation of the movable grinding disc through the transmission of the worm gear and the worm.

There are at least two adjusting rods, which are symmetrically distributed on the lower part of the connecting seat. Correspondingly, a guide groove is provided in the housing, and the adjusting rod is clamped in the guide groove to move axially.

The outer circumference of the fixed grinding disc is provided with an outer anti-rotation boss, and the outer anti-rotation boss is matched and connected with the inner anti-rotation boss arranged in the connecting seat.

The lower end of the connecting seat protrudes from its body to form at least two buckles, and the outer peripheral platform for fixing the grinding disc is carried on the upper end of the buckles; the buckles are located between two adjacent adjustment rods.

The upper end of the inner thread cylinder ring is protruded with a positioning ring, and the positioning ring is clamped in the clamping groove of the adjusting gear for coaxial connection with it; The positioning marble is elastically positioned in the gear hole.

The outer cylindrical surface of the drive shaft is sleeved with a cleaning device, and the cleaning device is located below the movable grinding plate. The upper end of the cleaning device is protruded with a number of positioning columns, and the positioning columns extend into and are clamped in the positioning holes on the lower end surface of the movable grinding plate. Inside, the cleaner moves coaxially with the movable grinding disc.

The bottom of the casing is provided with a motor seat, the drive motor is installed in the motor seat, and the motor drive shaft of the drive motor is vertically arranged with the drive shaft of the movable grinding disc.

The beneficial effects of the present invention are as follows: 1. The grinding device has a simple structure, low manufacturing cost and improved market competitiveness. 2. The working principle of the moving mechanism is simple, which effectively reduces the production cost of the coffee machine and improves the production efficiency of the coffee machine. 3. The setting of the adjustment device enables the user to adjust the thickness of the coffee powder according to the actual taste needs or the diameter of different types of coffee beans, which meets the needs of various groups of people and different types of coffee beans. 4. The positioning marble is elastically positioned in the gear hole of the inner thread cylinder ring, which avoids the phenomenon of transition adjustment or unclear adjustment, and at the same time locks the position of the adjustment gear and locks the adjustment result. 5. The drive shaft of the motor is set perpendicular to the rotation center of the grinding disc. Therefore, the motor does not need to be installed under the grinding wheel, which is conducive to the arrangement of the powder outlet and avoids the phenomenon of residual coffee powder in the powder bin.

Description of drawings

Figure 1 is an effect diagram of the general assembly of the present invention.

FIG. 2 is a schematic structural diagram of the hidden funnel in the present invention.

FIG. 3 is a structural assembly diagram of the grinding device and the casing in the present invention.

FIG. 4 is a top view of the hidden funnel in the present invention.

FIG. 5 is a cross-sectional view at A-A of FIG. 4 in the present invention.

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4 in the present invention.

FIG. 7 is a schematic structural diagram of a hidden shell in the present invention.

FIG. 8 is a structural assembly diagram of the grinding device and the driving mechanism in the present invention.

Figure 9 is a cross-sectional view of the adjusting device in the present invention.

10-11 are the structural assembly diagrams of the adjusting device in the present invention.

12-13 are the structural assembly diagrams of the movable grinding disc and the cleaner in the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings. A grinding mechanism of a coffee machine is characterized in that: it comprises a casing 1 and a funnel 2 arranged on the upper part for loading coffee beans, an installation area 11 is arranged inside the casing 1, and a grinding device 3 is installed in the installation area 11, The bean outlet opened at the lower end of the funnel 2 is connected to the grinding area of the grinding device 3, and the driving mechanism drives the grinding device 3 to grind the coffee beans located in the grinding area, and sweeps the coffee beans out of the powder outlet 6 through the cleaner 5;

The grinding device 3 includes a fixed grinding disc 31 installed in the installation area 11 axially, and a movable grinding disc 32 installed in a rotary manner. The fixed grinding disc 31 is sleeved outside the movable grinding disc 32. Fixed grinding teeth 311 and movable grinding teeth 321, a grinding zone is formed between the fixed grinding teeth 311 and the movable grinding teeth 321;

The outer periphery of the fixed grinding disc 31 is provided with an adjusting device 4 , and the adjusting device 4 includes an adjusting gear 41 sleeved on the outer periphery of the fixed grinding disc 31 . It also includes a connecting seat 42 between the adjusting gear 41 and the fixed grinding disc 31. The lower end of the connecting seat 42 protrudes from its body to form a plurality of adjusting rods 421. The internal thread is screwed, the adjusting gear 41 is rotated, and the connecting seat 42 drives the fixed grinding disc 31 to move up and down along the axial direction of the internal thread cylinder ring 7, thereby adjusting the axial relative position between the fixed grinding disc 31 and the movable grinding disc 32;

The drive mechanism includes a bearing seat 8 located at the bottom of the installation area 11, the drive shaft 323 of the movable grinding disc 32 is rotatably installed in the bearing seat 8, and the bottom of the drive shaft 323 is provided with a worm gear 9 and a motor drive shaft of the drive motor. 13. The worm 10 set on the top, the worm wheel 9 and the worm 10 are meshed with each other, and the drive motor drives the rotation of the movable grinding disc 32 through the transmission of the worm wheel 9 and the worm 10.

There are at least two adjusting rods 421 , which are symmetrically distributed on the lower part of the connecting seat 42 . Correspondingly, the housing 1 is provided with a guide groove 14 , and the adjusting rod 421 is clamped in the guide groove 14 to move axially.

The outer circumference of the fixed grinding disc 31 is provided with an outer anti-rotation boss 312 , and the outer anti-rotation boss 312 is matched and connected with the inner anti-rotation boss 424 provided in the connecting seat 42 .

The lower end of the connecting seat 42 protrudes from its body to form at least two buckles 423 , and the outer peripheral platform for fixing the grinding disc 31 is carried on the upper end of the buckles 423 ; the buckles 423 are located between two adjacent adjustment rods 421 .

The upper end of the inner thread cylinder ring 7 is protruded with a positioning ring 71, and the positioning ring 71 is clamped in the clamping groove 411 of the adjusting gear 41 for coaxial connection with it; the end surface of the positioning ring 71 is equidistant. Position hole 72 , the positioning pinball 15 provided on the housing 1 is elastically positioned in the position hole 72 .

The outer cylindrical surface of the drive shaft 323 is sleeved with a cleaning device 5, and the cleaning device 5 is located under the movable grinding disc 32. The upper end of the cleaning device 5 is protruded with a number of positioning columns 51, and the positioning columns 51 extend into and are clamped on. In the positioning hole 322 on the lower end surface of the movable grinding disc 32, the cleaner 5 and the movable grinding disc 32 move coaxially.

The bottom of the casing 1 is provided with a motor seat 12 , the drive motor is installed in the motor seat 12 , and the motor drive shaft 13 of the drive motor is vertically arranged with the drive shaft 323 of the movable grinding disc 32 .

Working principle: When the coffee beans need to be ground, the driving mechanism starts, and the movable grinding disc rotates under the action of the driving mechanism. The coffee beans located in the grinding area formed between the fixed grinding teeth and the moving Under continuous rotation, it is constantly squeezed with the fixed grinding plate, and gradually falls from the wide grinding area above to the narrow grinding area below. The coffee beans are ground from granular to powder, and finally pass through the cleaner located under the movable grinding plate. Sweep to the powder outlet to complete the grinding of coffee beans.

Wherein, the drive mechanism includes a bearing seat at the bottom of the installation area, the drive shaft of the movable grinding disc is rotatably installed in the bearing seat, the bottom of the drive shaft is provided with a worm wheel, a worm screw sleeved on the motor drive shaft of the drive motor, and the worm wheel and the worm screw are meshed with each other , The driving motor drives the rotation of the movable grinding disc through the transmission of the worm gear and the worm. The driving mechanism is simple in working principle, simple in structure, stable in transmission and high in sales, which effectively reduces the production cost of the coffee machine and improves the production efficiency of the coffee machine.

In addition, the motor drive shaft is set perpendicular to the center of rotation of the grinding disc, so the motor does not need to be installed under the grinding device to block the powder outlet, but is installed on one side of the grinding device, so the bean flour ground by the grinding device directly passes through the bean flour outlet. It flows into the bean powder container arranged under the bean grinding plate assembly, and does not need to pass through a long horizontal channel, so there is no residual bean powder after each time the beans are ground, which not only improves the utilization rate of beans, but also can be Ensure the quality of beverages or foods made from soy flour.

Further, an adjusting device is arranged on the outer periphery of the fixed grinding disc, and the adjusting device can adjust the axial relative position between the fixed grinding disc and the movable grinding disc, that is, the minimum outlet width of the grinding area is adjusted. According to the requirements of the diameter of coffee beans, the adjustment device is used to adjust the thickness of coffee powder, which meets the needs of various groups of people and different types of coffee beans.

Wherein, the adjusting device includes an adjusting gear sleeved on the outer periphery of the fixed grinding disc, and the lower end of the adjusting gear is coaxially fixed with an inner thread cylinder ring; the adjusting device also includes a connecting seat between the adjusting gear and the fixed grinding disc, and the lower end of the connecting seat protrudes from its body A number of adjustment rods are formed, the adjustment teeth protruding from the outer end of the adjustment rod are screwed with the inner thread of the inner thread cylinder ring, and the adjusting gear is rotated, and the connection seat drives the fixed grinding disc to move up and down along the axial direction of the inner thread cylinder ring, thereby adjusting The axial relative position between the fixed grinding disc and the movable grinding disc has the advantages of simple structure of the adjusting device, low technical requirements for adjusting operation, low adjustment difficulty, and convenient and quick operation.

Further, a positioning ring is protruded from the upper end of the inner thread cylinder ring, and the end face of the positioning ring is equidistantly distributed with several gear holes. The adjustment is carried out hole by hole, which avoids the phenomenon of transition adjustment or unclear adjustment. At the same time, the position of the adjustment gear is locked, and the adjustment state is locked, so as to avoid the vibration of the grinding process affecting the adjustment effect, so it can be widely promoted use.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Various changes and modifications fall within the scope of the claimed invention.

Claims (7)

1. A grinding mechanism for a coffee machine, characterized in that: it comprises a casing (1) and a funnel (2) arranged on the upper part for loading coffee beans, wherein a mounting area (11) is provided inside the casing (1), A grinding device (3) is installed in the installation area (11), the bean outlet opened at the lower end of the funnel (2) is connected to the grinding area of the grinding device (3), and the driving mechanism drives the grinding device (3) to be located in the grinding area. Grind the coffee beans, and sweep them away from the powder outlet (6) through the cleaner (5); Wherein, the grinding device (3) includes a fixed grinding disc (31) installed in the installation area (11) in an axially movable type, and a movable grinding disc (32) installed in a rotary type, and the fixed grinding disc (31) is sleeved on the movable grinding disc (32), the opposite surfaces of the two grinding discs are respectively provided with fixed grinding teeth (311) and movable grinding teeth (321), and a grinding zone is formed between the fixed grinding teeth (311) and the movable grinding teeth (321); An adjusting device (4) is provided on the outer periphery of the fixed grinding plate (31), and the adjusting device (4) comprises an adjusting gear (41) sleeved on the outer periphery of the fixed grinding plate (31), and the lower end of the adjusting gear (41) is coaxially fixedly mounted with a The inner thread cylinder ring (7), the adjusting device (4) further comprises a connecting seat (42) located between the adjusting gear (41) and the fixed grinding disc (31), and the lower end of the connecting seat (42) protrudes from its body to form several Adjusting rods (421), the adjusting teeth (422) protruding from the outer ends of the adjusting rods (421) are screwed with the internal thread of the internal thread cylinder ring (7), and the adjusting gear (41) is rotated, and the connecting seat (42) drives the The fixed grinding disc (31) moves up and down along the axial direction of the inner thread cylinder ring (7), so as to adjust the axial relative position between the fixed grinding disc (31) and the movable grinding disc (32); Wherein, the drive mechanism includes a bearing seat (8) at the bottom of the installation area (11), and the drive shaft (323) of the movable grinding disc (32) is rotatably installed in the bearing seat (8), and the drive shaft (323) The bottom is provided with a worm wheel (9), a worm (10) sleeved on the motor drive shaft (13) of the driving motor, the worm wheel (9) and the worm (10) are meshed with each other, and the driving motor passes through the worm wheel (9), the worm (10). The transmission drives the rotation of the movable grinding disc (32). 2 . The grinding mechanism of a coffee machine according to claim 1 , wherein at least two adjusting rods ( 421 ) are provided, which are symmetrically distributed in the lower part of the connecting seat ( 42 ). (1) A guide groove (14) is provided, and the adjusting rod (421) is clamped in the guide groove (14) to move axially. 3. The grinding mechanism of a coffee machine according to claim 1, characterized in that: an outer anti-rotation boss (312) is provided on the outer circumference of the fixed grinding disc (31), and the outer anti-rotation boss ( 312) is matched and connected with the inner anti-rotation boss (424) provided in the connecting seat (42). 4. The grinding mechanism of a coffee machine according to claim 2, characterized in that: the lower end of the connecting seat (42) protrudes from its body to form at least two buckles (423) for fixing the grinding disc (31) The outer peripheral platform is carried on the upper end of the buckle (423); the buckle (423) is located between two adjacent adjustment rods (421). 5 . The grinding mechanism of a coffee machine according to claim 1 , wherein a positioning ring ( 71 ) is protruded from the upper end of the inner thread cylinder ring ( 7 ), and the positioning ring ( 71 ) is clamped on the The clamping groove (411) of the adjusting gear (41) is coaxially connected with it; the end face of the positioning ring (71) is equidistantly distributed with several gear holes (72), and the positioning marbles ( 15) elastically positioned in the stop hole (72). 6 . The grinding mechanism of a coffee machine according to claim 1 , wherein the outer cylindrical surface of the drive shaft ( 323 ) is sleeved with a cleaner ( 5 ), and the cleaner ( 5 ) is located on the movable grinding disc ( 32 ). 7 . ), the upper end of the cleaner (5) is protruded with a number of positioning posts (51), and the positioning posts (51) extend into and are clamped in the positioning holes (322) on the lower end surface of the movable grinding disc (32), The cleaner (5) and the movable grinding disc (32) move coaxially. 7 . The grinding mechanism of a coffee machine according to claim 1 , wherein a motor seat ( 12 ) is arranged at the bottom of the casing ( 1 ), and a driving motor is installed in the motor seat ( 12 ) to drive the The motor drive shaft (13) of the motor is vertically arranged with the drive shaft (323) of the movable grinding disc (32).

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