Brushless motor driving type coffee bean grinder without reduction gearbox

Abstract

The brushless motor driving type coffee bean grinder without the reduction gearbox comprises a base and a shell, the shell is assembled on the base in an inclined mode, and the shell and the interior of the base jointly form a communicated containing cavity; a bean grinding bin, a main control system and a brushless motor controlled by the main control system are arranged in the accommodating cavity; a fixing pin penetrates through an output shaft of the brushless motor; the driven end of the bean grinding bin is connected with the fixing pin in a clamped mode, the bean grinding machine comprises a speed regulating system in communication connection with the main control system, a brushless motor is adopted to replace cooperation of a brass motor and a reduction gearbox in hardware, and when grinding starts, the main control system and the speed regulating system are matched to effectively provide strong torque for grinding; after the coffee beans reach a proper particle size, the rotating speed of the brushless motor is further controlled to realize further grinding, so that the driving structure is greatly simplified; and an output shaft of the brushless motor is connected with the bean grinding bin in a clamped mode through a fixing pin, driving force can be well transmitted, and the slipping condition is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to coffee grinder field, especially a brushless motor drive type coffee grinder without reduction gearbox. BACKGROUND

[0002] With the change of people's living habits and the improvement of life quality, more and more people start to accept and love coffee, so various coffee grinders for home use begin to appear in people's life, in the prior art, the traditional coffee grinder is through brass motor as brushless motor, but because coffee beans have certain hardness, so in the initial stirring process, the torque is difficult to drive the grinding disc to grind at the beginning, in order to solve the technical problem, the reduction gearbox is additionally arranged on the output shaft of the brass motor, and the reduction gearbox is used to form large torque to grind the coffee beans initially, and when grinding to a certain extent, the reduction gearbox is switched to high speed gear to quickly complete the grinding action, so as to obtain coffee powder, in the above structure, the collocation structure of brass motor and reduction gearbox is bulky, the cost is high and the assembly is complex, therefore, a more reasonable structure is needed to solve the above technical problems. SUMMARY

[0003] In view of the technical problem that the existing coffee grinder relies on the reduction gearbox for initial grinding, the utility model provides a solution.

[0004] To achieve the above purpose, the utility model provides a brushless motor drive type coffee grinder without reduction gearbox, characterized by including base and shell, the shell is assembled on the base, and the shell and the inside of the base form a communicating accommodating cavity together, the accommodating cavity is provided with a grinding bin, a main control system and a brushless motor controlled by the main control system, the output shaft of the brushless motor is provided with a soft outer layer fixed pin, and the driven end of the grinding bin is connected with the fixed pin,

[0005] The main control system controls the driving grinding speed of the brushless motor, and further includes a speed regulation system, the speed regulation system changes the grinding speed from low speed to high speed or from high speed to low speed through the adjustment of the main control system, and then increases or decreases according to the preset value to achieve the same torque rotation and grinding.

[0006] As an improved scheme of the utility model, the main control system controls the grinding speed of the brushless motor to increase at a speed less than or equal to 500 rpm.

[0007] As an improved scheme of the utility model, the speed regulating system changes from low speed to high speed or from high speed to low speed by the adjustment of the main control system, and then realizes speed change in the way of increment or decrement greater than or equal to 50 revolutions per minute, so as to achieve the same torsional force rotation for grinding.

[0008] As an improved scheme of the utility model, the surface of the fixed pin is covered with a buffer sleeve; the driven end is provided with a connecting sleeve, and opposite sides of the connecting sleeve are provided with clamping grooves for clamping the buffer sleeve.

[0009] As an improved scheme of the utility model, the grinding bin is provided with a partition plate, the partition plate divides the inner cavity of the grinding bin into a first part and a second part; a grinding disc is arranged in the first part, and a controlled end formed by the grinding disc penetrates through the partition plate and is connected with the brushless motor in the second part; the powder outlet pipe is also arranged, one end of the powder outlet pipe is communicated with the first part, and the other end of the powder outlet pipe is arranged outside the outer wall of the shell; wherein the second part is also provided with a control panel electrically connected with an ion generator, and a working probe of the ion generator is arranged to extend into the powder outlet pipe.

[0010] As an improved scheme of the utility model, the powder outlet pipe is composed of a first pipe and a second pipe, one end of the first pipe is communicated with the grinding cavity of the grinding bin, and the other end of the first pipe is arranged on the outer wall of the shell and is attached to the second pipe; the pipe column of the second pipe is provided with a recovery structure, the outer edge of the recovery structure is fixedly connected with the outer wall of the shell, and the second pipe realizes reciprocating motion to impact the first pipe.

[0011] As an improved scheme of the utility model, one end of the first pipe and the second pipe far away from each other is provided with an assembly inclined surface, the assembly inclined surface is provided with a long strip opening, a part of the opening area formed by the long strip opening is covered by the partition plate and the ion generator 36, and the other part is communicated with the first part.

[0012] As an improved scheme of the utility model, the opposite sides of the pipe column of the second pipe are also provided with fixed protrusions; the recovery structure comprises elastic members matched in number with the fixed protrusions, one end of the elastic member is connected with the fixed protrusion, and the other end of the elastic member is connected with the end face of the recovery structure.

[0013] As an improved scheme of the utility model, the elastic member is a spring, and the end face of the recovery structure is provided with a spring groove for accommodating the spring.

[0014] As an improved scheme of the utility model, the top of the shell is equipped with an opening for exposing the grinding disc in the bean grinding bin, and the outer wall of the bean grinding bin is embedded with a magnetic induction switch electrically connected with the main control system; further comprising a bean storage bin detachably connected with the opening; the magnetic induction switch senses the magnetic intensity carried by the bean storage bin, and if it is lower than the intensity threshold, the power supply is disconnected.

[0015] As an improved scheme of the utility model, the bean storage bin is fixedly provided with an induction magnetic ring matched with the magnetic induction switch at the cover combined end of the opening.

[0016] As an improved scheme of the utility model, the outer bottom of the bean storage bin is provided with a fixing ring, the inner bottom is conical and provided with a material distribution support, and the mounting feet of the material distribution support are collectively penetrated through the bottom of the bean storage bin and the induction magnetic ring and connected with the fixing ring.

[0017] The utility model discloses the beneficial effect is: compared with the prior art, the utility model provides a kind of brushless motor drive type coffee bean grinder without reduction gearbox, including base and shell, shell is assembled on base obliquely, and the inside of shell and base is jointly formed into the accommodating cavity of intercommunication;Bean grinder, main control system and brushless motor controlled by main control system are arranged in accommodating cavity;The output shaft of brushless motor is provided with fixed pin;Driven end of bean grinder is connected with fixed pin with soft outer layer;And including the speed regulation system of communication connection with main control system;Hardware is replaced with brushless motor to replace the cooperation of brass motor and reduction gearbox, when grinding starts, main control system and speed regulation system cooperate effectively to provide strong torque for grinding, after coffee bean reaches appropriate particle size, further control the speed of brushless motor to realize further grinding, greatly simplify driving structure;And the output shaft of brushless motor is connected with bean grinder by fixed pin, can very good transmission of driving force, prevent the condition of skidding. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the perspective view of the utility model;

[0019] Figure 2 It is the explosion view of the utility model;

[0020] Figure 3 It is the cooperation schematic view of brushless motor and grinding disc of the utility model;

[0021] Figure 4 It is the cooperation schematic view of second pipeline and recovery structure of the utility model;

[0022] Figure 5 It is the cooperation schematic view of baffle, ion generator and first pipeline of the utility model;

[0023] Figure 6 It is the explosion schematic view of the bean storage bin of the utility model;

[0024] Figure 7 It is the magnetic induction switch schematic view of the utility model;

[0025] Figure 8 It is the three-dimensional view schematic view of the brushless motor of the utility model;

[0026] Figure 9 It is the Figure 8 Local enlarged view of the A area of the utility model;

[0027] Figure 10 It is the shell and base cooperation schematic view of the utility model's figure;

[0028] Figure 11 It is the Figure 10 Local enlarged view of the B area of the utility model;

[0029] Figure 12 It is the main control system schematic view of the utility model;

[0030] Figure 13 It is the connection block diagram of the brushless motor, main control system and speed regulation system of the utility model.

[0031] The main component symbol is explained as follows:

[0032] 1, base; 11, speed regulation system;

[0033] 2, shell; 21, containing gap; 22, guide and dress convex; 23, magnetic attraction unit;

[0034] 3, bean grinding bin; 31, connecting sleeve; 32, magnetic induction switch; 33, first groove body; 34, second groove body; 35, partition; 36, ion generator;

[0035] 4, main control system;

[0036] 5, brushless motor; 51, fixed pin; 52, buffer sleeve;

[0037] 6, first pipeline; 61, installation inclined plane;

[0038] 7, second pipeline; 71, fixed convex;

[0039] 8, return structure; 81, elastic piece; 82, spring groove; 83, guide and dress recess;

[0040] 9, bean storage bin; 91, induction magnetic ring; 92, fixed ring; 93, material distribution support. Specific implementation

[0041] In order to make the utility model clearer, the utility model will be further described below in connection with the drawings.

[0042] In the following description, the example details are given in order to provide a more in-depth understanding of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. It should be understood that the specific embodiments are only used to explain the utility model, and are not used to limit the utility model.

[0043] It should be understood that when the terms "contain" and / or "include" are used in the specification, it means that the features, whole, steps, operations, elements or components exist, but do not exclude the existence or addition of one or more other features, whole, steps, operations, elements, components or their combinations.

[0044] In the prior art, the traditional coffee grinder has multiple problems: first, the assembly is complex, the volume is increased and the processing cost is caused by adopting brass motor and speed reducer; second, the adhesion state of the inner wall of the clear powder outlet pipe of the coffee grinder is single, and the removal is carried out by the negative ion generator or the powder removal structure, and the removal capacity is limited; third, in the process of cleaning, maintaining or replacing the grinding disc in the grinding bin, the power cord needs to be pulled out, which is troublesome, otherwise safety hazards are easy to occur;

[0045] In order to solve the above-mentioned technical problems, the application provides a brushless motor driving type coffee grinder without speed reducer, please refer to the attached Figure 1 to the attached Figure 13, including a base 1 and a shell 2, the shell is inclinedly assembled on the base, the shell 1 and the inside of the base 2 jointly form a communicating accommodating cavity; the accommodating cavity is provided with a bean grinding bin 3, a main control system 4 and a brushless motor 5 controlled by the main control system; the output shaft of the brushless motor 5 is provided with a soft outer layer fixing pin 51; the driven end of the bean grinding bin 3 is clamped with the fixing pin; the main control system controls the driving grinding speed change of the brushless motor; further comprising a speed regulation system 11, the speed regulation system 11 changes the grinding speed from low speed to high speed or from high speed to low speed through the control of the main control system 4, and then increases or decreases according to the preset value to achieve the same torque rotation grinding; in the actual hardware, the main control system 4 is a circuit board, and the circuit board is loaded with a circuit for controlling the brushless motor to control the output of the brushless motor; the speed regulation system 11 is a specific knob, touch screen, capacitive adjustment button, etc., which can produce an adjustment signal, which is then responded and processed by the main control system 4, and then the user's adjustment operation of the grinder is realized; further, it is worth mentioning that the cooperation of the adjustment system and the main control system 4 makes the brushless motor always maintain the same torque output to grind the coffee beans, which is more efficient and will not cause grinding jam due to the change of torque, realizing efficient grinding.

[0046] By adopting the brushless motor to replace the cooperation of brass motor and reduction box, at the beginning of grinding, the adjustment system and the main control system 4 effectively provide strong torque for grinding, and after the coffee beans reach the appropriate particle size, the speed of the brushless motor is further controlled to realize further grinding, greatly simplifying the driving structure; and the output shaft of the brushless motor is clamped with the bean grinding bin through the fixing pin 51, which can well conduct the driving force and prevent slipping.

[0047] The specific preset speed parameter scheme is that the main control system 4 controls the grinding speed of the brushless motor to increase adjustment at a speed less than or equal to 500 rpm, which can well grind different types of coffee beans quickly and enter the grinding state; further, the speed regulation system 11 changes the grinding speed from low speed to high speed or from high speed to low speed through the adjustment of the main control system 4, and then increases or decreases at a speed greater than or equal to 50 rpm to achieve speed change, so as to achieve the same torque rotation grinding, which can well cooperate with the speed gradient of the brushless motor, and the user can quickly master the specific speed regulation rhythm to improve the user experience.

[0048] In the embodiment, the surface of the fixed pin 51 is covered with a buffer sleeve 52, which is the aforementioned soft outer layer, and the material is preferably silica gel or other composite polymer flexible material; the driven end is provided with a connecting sleeve 31, and the opposite sides of the connecting sleeve 31 are provided with clamping grooves for clamping the buffer sleeve 52; it is not difficult to understand that the driven end of the grinding disc is connected with the buffer sleeve 52, and in the process of working of the brushless motor 5, the fixed pin 51 transmits the rotating force of the brushless motor 5 to the grinding disc, so as to drive the grinding disc, and the surface of the fixed pin 51 is provided with the buffer sleeve 52 and directly contacts with the grinding disc through the buffer sleeve 52, so as to avoid the vibration, noise and concentricity during rotation caused by direct contact; in a specific scheme, the driven end of the grinding disc is provided with the connecting sleeve 31, and the opposite sides of the connecting sleeve 31 are provided with clamping grooves for clamping the buffer sleeve 52; it is not difficult to understand that by additionally arranging the connecting sleeve 31, the clamping grooves directly contact with the buffer sleeve 52, and the fixed pin 51 forms the main conduction effect in the process of rotation, and the buffer sleeve 52 realizes the buffering effect during the working of the brushless motor 5, so as to avoid the vibration and abnormal sound caused by the direct clamping of the connecting sleeve 31 and the fixed pin 51; the arrangement of the connecting sleeve 31 greatly reduces the connection difficulty of the grinding disc and the brushless motor 5.

[0049] As an improved scheme of the utility model, the bean grinding bin is provided with a partition plate 35, the inner cavity of the bean grinding bin is divided into a first part and a second part by the partition plate 35; the first part is provided with a grinding disc, and the controlled end formed by the grinding disc penetrates through the partition plate 35 and is connected with the brushless motor in the second part; the bean grinder further comprises a powder outlet pipe, one end of the powder outlet pipe is communicated with the first part, and the other end extends out of the outer wall of the shell; wherein, the second part is further provided with a control panel electrically connected with an ion generator 36, and the working probe of the ion generator 36 extends into the powder outlet pipe; in the working process, the ion generator 36 emits negative ions, thereby neutralizing the static electricity in the coffee powder, improving the static electricity environment in the powder outlet pipe, and greatly reducing the adsorption situation; the bean grinding bin is reasonably divided by the partition plate 35, the first and second sub-zones are respectively arranged for the grinding disc and the ion generator 36, so that the two components do not affect each other, and the two sides of the partition plate 35 are correspondingly optimized in the transverse volume of the bean grinder.

[0050] In order to better clean and maintain the powder removal pipe, even with the ion generator 36, due to the influence of temperature and humidity of the use environment, the degree of coffee bean roasting and dehydration, and other comprehensive factors, there may still be difficult to clean cases, therefore, in the embodiment, the powder outlet pipe is composed of a first pipe 6 and a second pipe 7, the end of the first pipe 6 is located on the outer wall of the shell; the pipe column of the second pipe 7 is sleeved with a recovery structure 8, the outer edge of the recovery structure 8 is fixedly connected with the outer wall of the shell and the second pipe 7 realizes reciprocating motion to impact the first pipe 6; the first pipe 6 and the second pipe 7 are separately arranged, and the first pipe 6 is reciprocated by the recovery mechanism to impact the second pipe 7; when the second pipe 7 impacts the first pipe 6, the two components vibrate, thereby causing the coffee powder to fall off from the pipe wall; the application directly impacts the first pipe 6 by the recovery structure 8 to achieve the impact of the second pipe 7 on the first pipe 6, which can obtain a longer energy storage stroke in the same space and better cleaning strength; the ion generator 36, the first pipe 6, the second pipe 7 and the recovery structure 8 are used in combination, which can achieve better powder removal effect, specifically, the negative charge generated by the ion generator 36 can keep the pipe wall of the first pipe 6 and the second pipe 7 in a non-static state, in this state, the impact of the first pipe 6 and the second pipe 7 can make the coffee powder fall better, increasing the cleaning degree.

[0051] In the embodiment, the end of the first pipe 6 and the second pipe 7 far away from each other is provided with an assembly slope 61, the assembly slope 61 is provided with a long opening, a part of the opening area formed by the long opening is jointly covered by the partition plate 35 and the ion generator 36, and the other part is communicated with the first part; by assembling the first pipe 6 on the side wall of the bean grinder bin at a predetermined angle through the assembly slope 61, the coffee powder can be better guided to discharge by gravity, and the long opening is used as the coffee powder inlet, and the partition plate 35 and the ion generator 36 are used as the blocking part of the long opening, which can make the slope of the assembly slope higher and further reduce the overall volume of the coffee grinder.

[0052] In the specific assembly of the second pipeline 7 and the return structure 8, the return structure 8 can be correspondingly provided with a spring sheet, a torsional spring or the like to realize the reciprocating movement of the second pipeline 7, and the assembly between the return structure 8 and the shell 2 can be realized through insertion, clamping or screwing, and in the embodiment, the opposite two side columns of the second pipeline 7 are further provided with fixing protrusions 71; the return structure 8 comprises elastic members 81 matched in number with the fixing protrusions 71, one end of the elastic member 81 is connected with the fixing protrusion 71, the other end is connected with the end face of the return structure 8, and the second pipeline 7 is connected with the return structure 8 through the fixing protrusion 71 and the elastic member 81, which is more simple and efficient in structure, and the movement of the second pipeline 7 is more smooth and less likely to jam; in a further scheme, the elastic member 81 is a spring, and the end face of the return structure 8 is provided with a spring groove 82 for fixing and accommodating the spring; the spring groove 82 can well accommodate the elastic member 81, and it is understood that the maximum energy storage stroke of the second pipeline is equal to the length of the spring groove 81, and the spring groove 83 also serves as a guiding sliding groove for the fixing protrusion 71, which is reasonable in design and can increase the energy storage stroke of the spring in a limited volume to obtain greater impact force.

[0053] In a further optimization scheme, it is found in actual use that during the impact process of the first pipeline 6 and the second pipeline 7, the coffee powder is easy to overflow out of the pipeline when separated, and in a more optimal scheme, the end of the first pipeline 6 away from the bean mill 3 has a part of the volume movably sleeved on the end sleeve ring of the second pipeline 7, the inner diameter of the sleeve ring is the same as the inner diameter of the second pipeline 7, and the outer diameter is smaller than the outer diameter of the second pipeline 7, thereby forming a step surface that can be impacted, reducing the overflow of coffee powder and ensuring the smooth generation of the impact action.

[0054] In the embodiment, the shell 2 is provided with an accommodating notch 21, and the return structure 8 is located in the accommodating notch 21 to be flush with the surface formed by the shell, so that the return structure 8 is flush with the surface of the shell, which can significantly increase the coordination of the appearance of the product and will not damage the appearance.

[0055] In order to reduce the assembly difficulty of the return structure 8 installed on the accommodating notch 21, in the embodiment, the two side inner walls of the accommodating notch 21 are further provided with guide assembly protrusions 22, and the two sides of the return structure 8 are provided with guide assembly grooves 83 matched with the guide assembly protrusions 22, the guide assembly protrusions 22 and the guide assembly grooves 83 are matched with each other, which can quickly help technicians and users to quickly install the return structure 8 on the accommodating notch 21; in a preferred scheme, the bottom surface of the accommodating notch 21 is further provided with at least one magnetic attraction unit 23, and the return structure 8 is provided with a magnetic attraction groove matched with the magnetic attraction unit 23, and it is not difficult to understand that stable attraction assembly is realized through the magnetic attraction groove and the magnetic attraction unit 23, and the guide assembly protrusions 22 and the guide assembly grooves 83 realize faster installation.

[0056] In this embodiment, the top of the shell is provided with an opening for exposing the grinding disc in the bean grinding bin, and the outer wall of the bean grinding bin is embedded with a magnetic induction switch 32 electrically connected with the main control system; further comprising a bean storage bin detachably connected with the opening; the magnetic induction switch 32 senses the magnetic intensity carried by the bean storage bin, and if it is lower than the intensity threshold, the power supply is disconnected; in combination with the actual use, the foregoing scheme is better: during the use of the coffee machine, there is a need for cleaning the grinding disc, replacing the grinding disc or overhauling the grinding disc, and in this embodiment, the user only needs to take out most of the coffee bean raw materials in the coffee bean grinder, and then unlock and separate the bean storage bin 9 from the shell 2 (this process does not need to pull out the power cord), at this time, the grinding disc is exposed through the opening, and the detachable effect can be achieved by using the connection modes of screw thread, plug-in, magnetic attraction or buckling between the bean storage bin 9 and the shell 2; since the magnetic induction switch 32 can sense the change of the magnetic intensity carried by the bean storage bin 9, when it is lower than the intensity threshold, the magnetic induction switch 32 is closed so that the main control system 4 enters the power-off state, and the user can quickly realize the actions of overhauling, cleaning or replacing the grinding disc; subsequently, when the overhauling and cleaning work is completed, the bean grinding bin 3 and the shell 2 are reassembled, after the assembly is completed, the magnetic induction switch 32 senses the magnetic intensity above the preset threshold and enters the conduction state, and the main control system 4 enters the power-on state to support the normal use of the coffee bean grinder;

[0057] As can be seen, when the bean storage bin 9 and the shell 2 are in the disassembled state, the magnetic induction switch 32 senses the magnetic intensity carried by the bean storage bin 9, and if it is lower than the intensity threshold, the power supply is disconnected, without the need to additionally pull out the power cord, the safe overhauling, cleaning or replacing of the grinding disc can be realized, and after the expected action is completed, the bean grinding bin 3 and the shell 2 can be reassembled, and if the magnetic induction switch 32 senses that the magnetic intensity is higher than the threshold, the main control system 4 enters the power-on state, and the overall action is safer and more convenient.

[0058] In a specific scheme, the outer wall of the bean grinding bin 3 is provided with a mounting groove 32, and the magnetic induction switch 32 is fixed in the mounting groove 32. By arranging the mounting groove 32, the magnetic induction switch 32 is arranged between the bean grinding bin 3 and the shell 2, so that the magnetic induction switch 32 can be better protected, and the working stability of the magnetic induction switch 32 is prevented from being affected by external bumps. In a further scheme, the mounting groove 32 is divided into a first groove part 33 and a second groove part 34 connected with each other, and the second groove part 34 extends to the end of the bean grinding bin 3 to form a wiring channel; the main control system 4 is located in the space of the seat body 1; in order to better arrange the wiring of the magnetic induction switch 32, the mounting groove 32 is divided into the first groove part 33 and the second groove part 34, the first groove part 33 is specially used for accommodating the magnetic induction switch 32, and the second groove part 34 is used for arranging the connection wire harness; in a preferred scheme, the groove width of the second groove part 34 is smaller than the groove width of the first groove part 33, because the connection wire harness requires less space and can ensure the overall firmness of the bean grinding bin 3 profile.

[0059] For the magnetic design of the bean grinding bin 3, a Hall element, a magnetic block, an iron block or the like can be used to realize, or a metal part in the bean storage bin 9 can be used to provide a magnetic force matched with the magnetic induction switch 32; in the embodiment, the bean storage bin 9 and the open cover are fixedly provided with an induction magnetic ring 91 matched with the magnetic induction switch 32; by specially designing the annular induction magnetic ring 91 matched with the magnetic induction switch 32, when the shell 2 and the bean grinding bin 3 are connected by threads, the magnetic induction switch 32 can be inducted at any position of the rotation to the appropriate assembly tightness, so that the assembly is more rapid.

[0060] In order to fix the induction magnetic ring 91, in the embodiment, the outer bottom of the bean storage bin 9 is provided with a fixing ring 92, the inner bottom is conical and provided with a distribution support 93, and the mounting feet of the distribution support 93 collectively penetrate the bottom of the bean storage bin 9 and the induction magnetic ring 91 and are connected with the fixing ring 92; by cooperation of the fixing ring 92 and the distribution support 93, the induction magnetic ring 91 is fixed at the bottom of the bean storage bin 9, so that the stable cooperation with the magnetic induction switch 32 is realized.

[0061] In the embodiment, the side of the distribution support away from the bean grinding bin 3 is provided with a tapered part, which can guide the coffee beans to fall into the distribution port formed by the mounting feet of the distribution support 93 when used, so that the situation of coffee beans being stuck is reduced.

[0062] In the embodiment, the grinding disc is one of a conical grinding disc and a flat grinding disc; it is worth understanding that, because coffee beans are various in types, the taste and aroma of different types of coffee beans need to be different in thickness, so that the advantages of the taste can be exerted, and therefore, the conical grinding disc and the flat grinding disc have advantages in the grinding work, and can be configured according to different user groups.

[0063] The utility model discloses the advantages are in:

[0064] 1, the output shaft of brushless motor is provided with fixed pin, and the surface of fixed pin is provided with buffer sleeve, the driven end of grinding disc is connected with buffer sleeve, in the process of brushless motor working, fixed pin transmits the rotary force of brushless motor to grinding disc, realizes the driving of grinding disc, and the surface of fixed pin is provided with buffer sleeve and directly contacts with grinding disc through buffer sleeve, avoids the vibration, noise and concentricity of direct contact when rotating.

[0065] 2, the bean grinding bin is formed reasonable separation through the partition, and the first partition and the second partition are respectively arranged in space to the grinding disc and the ion generator, so that the two components do not affect each other, and the two sides of the partition are correspondingly located to optimize the transverse volume of the bean grinder.

Claims

1. A brushless motor-driven coffee grinder without a reduction gear box, characterized in that, The application relates to a coffee grinder, which comprises a base and a shell, the shell being obliquely assembled on the base, the shell and the interior of the base jointly forming a communicating accommodating cavity; a coffee bean grinding bin, a main control system and a brushless motor controlled by the main control system are arranged in the accommodating cavity; a fixed pin with a flexible outer layer is arranged on the output shaft of the brushless motor; the driven end of the coffee bean grinding bin is clamped with the fixed pin. The main control system controls the driving grinding rotating speed change of the brushless motor; a speed regulating system is further arranged, the speed regulating system changes the grinding speed from low speed to high speed or from high speed to low speed through the control of the main control system, and then the grinding speed is increased or decreased according to preset values to achieve the same torque rotation for grinding.

2. A brushless motor driven coffee grinder without a reduction gearbox according to claim 1, characterized in that The main control system controls the grinding rotating speed of the brushless motor to be increased at a rotating speed less than or equal to 500 rpm.

3. A brushless motor driven coffee grinder without a reduction gearbox according to claim 1, characterized in that, The speed regulating system changes the grinding speed from low speed to high speed or from high speed to low speed through the adjustment of the main control system, and then the speed is increased or decreased at a speed greater than or equal to 50 rpm to achieve the same torque rotation for grinding.

4. The brushless motor-driven coffee grinder without a reduction gearbox according to claim 1, characterized in that, A partition plate is arranged in the coffee bean grinding bin, the partition plate divides the inner cavity of the coffee bean grinding bin into a first part and a second part; a grinding disc is arranged in the first part, the controlled end formed by the grinding disc penetrates through the partition plate and is connected with the brushless motor in the second part; a powder outlet pipe is further arranged, one end of the powder outlet pipe is communicated with the first part, and the other end of the powder outlet pipe is arranged outside the outer wall of the shell; wherein the second part is further provided with a control board electrically connected with an ion generator, and a working probe of the ion generator is arranged to extend into the powder outlet pipe.

5. A brushless motor driven coffee grinder without a reduction gearbox according to claim 4, characterized in that The powder outlet pipe is composed of a first pipe and a second pipe, one end of the first pipe is communicated with the grinding cavity of the coffee bean grinding bin, and the other end of the first pipe is located on the outer wall of the shell and is attached to the second pipe; a recovery structure is arranged on the pipe column of the second pipe, the outer edge of the recovery structure is fixedly connected with the outer wall of the shell, and the second pipe realizes reciprocating motion to impact the first pipe.

6. A brushless motor driven coffee grinder without a reduction gearbox according to claim 5, characterized in that One end of the first pipe and the second pipe away from each other is provided with an assembly inclined surface, the assembly inclined surface is provided with a long strip opening, a part of the opening area formed by the long strip opening is covered by the partition plate and the ion generator, and the other part is communicated with the first part.

7. A brushless motor driven coffee grinder without a reduction gearbox according to claim 6, characterized in that The opposite two side pipe columns of the second pipe are further provided with fixed protrusions; the recovery structure comprises a plurality of elastic members matched with the number of the fixed protrusions, one end of the elastic member is connected with the fixed protrusion, and the other end of the elastic member is connected with the end surface of the recovery structure.

8. The brushless motor-driven coffee grinder without a reduction gearbox according to claim 1, characterized in that The top of the shell is provided with an opening for exposing the grinding disc in the coffee bean grinding bin, the outer wall of the coffee bean grinding bin is embedded with a magnetic induction switch electrically connected with the main control system; a coffee bean storage bin detachably connected with the opening is further arranged; the magnetic induction switch senses the magnetic intensity carried by the coffee bean storage bin, and if the magnetic intensity is lower than a strength threshold value, the power supply is disconnected.

9. A brushless motor driven coffee grinder without a reduction gearbox according to claim 8, characterized in that The cover end of the coffee bean storage bin and the opening is fixedly provided with an induction magnetic ring matched with the magnetic induction switch.

10. A brushless motor driven coffee grinder without a reduction gearbox according to claim 9, characterized in that The outer bottom of the bean storage bin is provided with a fixing ring, the inner bottom is conical and provided with a distribution support, and the mounting feet of the distribution support are penetrated through the bottom of the bean storage bin and the inductive magnetic ring and connected with the fixing ring.

Images