Bean grinder capable of automatically adjusting cutter gap

Abstract

The utility model relates to the technical field of bean grinders, in particular to a bean grinder capable of automatically adjusting cutter gaps. Comprising a main machine, a grinding assembly, a driving motor and a controller are arranged on the main machine, and the driving motor is in transmission connection with the grinding assembly; the grinding assembly comprises a fixed cutter head and a movable cutter head, a grinding gap is formed between the fixed cutter head and the movable cutter head, an adjusting motor and an adjusting mechanism are arranged on the main machine, and the adjusting motor drives the grinding assembly through the adjusting mechanism so as to change the size of the grinding gap; a current detection module is arranged on the controller, and the controller is connected with the driving motor and the adjusting motor through lines; according to the bean grinder capable of automatically adjusting the cutter gap, the adjusting motor can enable the grinding gap to tend to be zero through the adjusting mechanism, then the grinding gap reaches a set value through the adjusting mechanism, and the purpose of automatically controlling the grinding thickness is achieved; after coffee beans are ground, the controller automatically closes the driving motor, so that energy consumption is reduced, and the service life of equipment is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a bean grinder technical field, especially point to a kind of automatic adjustment knife gap's bean grinder. BACKGROUND

[0002] The grinding part of the bean grinder on the market currently generally includes upper grinding disc and lower grinding disc, the upper grinding disc is fixedly arranged, the lower grinding disc is connected with the output shaft of motor, and the upper grinding disc and the lower grinding disc rotate relatively to grind bean materials and the like. The bean grinder is usually provided with an electronic program to control the grinding time, but the number of coffee beans in the bean bin and entering the grinding part is subject to error, and the host will stop or idle regardless of whether there are beans, which not only wastes but also affects the service life of the equipment.

[0003] The adjusting device for adjusting the fineness of coffee grinding and the coffee bean grinder disclosed in Chinese patent CN207768218U include: a first bracket arranged below the motor and fixed at the lower end of the motor, the middle part of the first bracket has an axial screw hole, and the upper end of the motor shaft is fixedly connected with the lower grinding disc of the upper grinding disc and the lower grinding disc used for grinding coffee; an adjusting element screwed in the axial screw hole of the first bracket, the lower end of the adjusting element has a polygonal adjusting screw head; a limiting auxiliary adjusting structure for preventing the adjusting element from loosening in the axial screw hole of the first bracket and providing the rotating adjusting element to adjust the position of the lower grinding disc in the axial direction, which is connected with the adjusting screw head.

[0004] The above prior art is to manually rotate the threaded structure to drive the upper and lower grinding discs to change the gap to achieve the purpose of adjusting the fineness of coffee powder. Since the components of the grinding part are mostly made of plastic parts, there is a certain machining precision, so thin gaskets are added to ensure the installation tolerance. However, this manual adjustment method makes the grinding gap unstable, consumes a long time, and the final effect is also unstable, which leads to a decrease in assembly efficiency and an increase in cost.

[0005] Therefore, the prior art still needs to be improved and developed. UTILITY MODEL CONTENTS

[0006] The utility model aims at the defects and deficiencies of prior art, and provides a bean grinder with reasonable structure, which can intelligently adjust the fineness, save energy and protect the environment, and automatically adjust the knife gap.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] The utility model discloses a kind of automatic adjustment tool gap's bean grinder, including host computer, the host computer is equipped with grinding assembly, driving motor and controller, driving motor is connected with grinding assembly transmission;The grinding assembly includes fixed knife disc and moving knife disc, and grinding gap is formed between fixed knife disc and moving knife disc, host computer is equipped with adjusting motor and adjusting mechanism, adjusting motor drives grinding assembly to change the size of the grinding gap by adjusting mechanism;Current detection module is equipped on the controller, and controller is connected driving motor and adjusting motor by circuit respectively.The current detection module on the controller, the working current of driving motor and adjusting motor can be detected, and logic judgment is carried out according to current signal, the adjusting motor is used to drive grinding assembly to change grinding gap, and grinding assembly can be ground coffee bean by relative rotation, and grinding gap represents the grinding fineness of grinding assembly.When host computer starts to work, adjusting motor is simultaneously started by adjusting mechanism driving grinding assembly, so that grinding gap tends to minimum (limit value is 0), the frictional resistance between grinding assembly is maximum at this time, and the output current of adjusting motor approaches peak value, and current detection module sends signal to controller, and controller controls adjusting motor reverse rotation, and then the adjusting motor drives grinding assembly to control the grinding gap to set value.

[0009] It can be understood that, when grinding gap is from 0 to set value, it can be realized by the stroke control of adjusting motor, so that the utility model can automatically and accurately control grinding gap, so that the grinding fineness of coffee bean is more accurate and stable.Further, adjusting motor and adjusting structure drive grinding assembly to control grinding gap, so that it does not need too high matching precision when assembling, even if there is a small amount of machining error between parts, stable and accurate particle fineness can be obtained after grinding gap calibration.

[0010] Further, after the grinding gap is determined, driving motor drives grinding assembly to rotate relatively to grind coffee bean, when coffee bean is ground, grinding assembly idling makes the output current of driving motor tend to minimum, and current detection module closes driving motor by controller according to the current change of driving motor, so as to save energy consumption and improve the service life of equipment.

[0011] According to the above scheme, the fixed cutter disc is fixedly connected with the output shaft of the driving motor; the adjusting mechanism is connected with the movable cutter disc to allow the movable cutter disc to be movably sleeved on the fixed cutter disc, and then the grinding gap is formed between the movable cutter disc and the fixed cutter disc. The driving motor is fixedly arranged in the main machine, and the output shaft of the driving motor is connected with the fixed cutter disc to drive the fixed cutter disc to rotate; the outer wall of the fixed cutter disc is formed with grinding teeth, the movable cutter disc is sleeved on the fixed cutter disc, the inner wall of the movable cutter disc is formed with grinding teeth, and the grinding gap is the distance between the grinding teeth on the movable cutter disc and the fixed cutter disc. Under the driving of the driving motor, the fixed cutter disc can rotate relative to the movable cutter disc, so that the coffee beans are crushed through the grinding teeth between the fixed cutter disc and the movable cutter disc. Further, the movable cutter disc can move up and down relative to the fixed cutter disc, so that the size of the grinding gap is adjusted to obtain different fineness of coffee powder.

[0012] According to the above scheme, the adjusting mechanism comprises a rotating support and a lifting support, the rotating support is rotatably arranged in the upper port of the main machine, and the inner wall of the rotating support is provided with an internal thread; the outer wall of the lifting support is provided with an external thread, the lifting support is arranged in the rotating support, and the lifting support and the rotating support are in transmission connection through the internal thread and the external thread, and the movable cutter disc is fixedly arranged on the lifting support. The rotating support drives the lifting support to move up and down through thread transmission, and the thread transmission can finely control the stroke of the movable cutter disc through different pitches, so that the grinding fineness is accurately adjusted.

[0013] According to the above scheme, the upper port of the main machine is provided with a centering shaft sleeve, the lower end of the lifting support is arranged in the centering shaft sleeve, and the lifting support and the centering shaft sleeve are in sliding fit through a key groove. Specifically, the lower end of the lifting support is concentrically arranged in the centering shaft sleeve, so that the movable cutter disc, the lifting support and the fixed cutter disc are concentrically arranged, and the lifting support is in sliding fit with the centering shaft sleeve through the key groove. When the rotating support rotates, the lifting support can be driven to slide up and down through the thread transmission, so that the grinding gap between the movable cutter disc and the fixed cutter disc is adjusted.

[0014] According to the above scheme, the rotating support is provided with an assembly support, the assembly support is arranged in the lifting support and fixedly connected with the lifting support, the movable cutter disc is arranged in the assembly support and arranged in pairs with the fixed cutter disc. It can be understood that the movable cutter disc is usually made of high-cost materials, while the lifting support, the assembly support and the rotating support are only structural parts and have relatively low cost. Generally, in order to make the installation space inside the equipment, the caliber of the above-mentioned rotating support and lifting support is large. The assembly support is used to install the movable cutter disc in the rotating support, and the assembly support can fill the space between the movable cutter disc and the lifting support, and is also convenient for the structural design of each part.

[0015] According to the above scheme, the rotating support is provided with a passive gear, the passive gear is rotatably arranged in the upper port of the main machine, the adjusting motor is arranged on one side of the passive gear, a driving gear is arranged on the output shaft of the adjusting motor, and the driving gear is in meshing connection with the passive gear. As described above, the rotating support and the lifting support are connected through thread transmission, the rotating motion of the rotating support is converted into the up-down motion of the lifting support, and the grinding gap between the movable cutter disc and the fixed cutter disc can be finely adjusted according to the thread transmission. Further, the adjusting motor drives the passive gear to rotate through the driving gear, the high rotating speed of the adjusting motor can be changed into low rotating speed through the gear transmission ratio between the adjusting motor and the passive gear, the stroke control is realized, the lifting support and the movable cutter disc are driven to move up and down through the rotating support, and the accurate adjustment of the grinding gap is realized.

[0016] According to the above scheme, the outer wall of the rotating support is provided with a transmission gear, the inner wall of the passive gear is provided with a plurality of transmission keys, the transmission keys are in meshing transmission with the transmission gear, so that the passive gear and the rotating support can synchronously rotate. The rotating support and the passive gear are connected through the transmission gear and the transmission keys, so that the rotating support and the passive gear can move up and down, when the grinding gap between the movable cutter disc and the fixed cutter disc approaches 0, the rotating support can move up and down, so as to prevent the movable cutter disc and the fixed cutter disc from being locked or from appearing the tooth striking phenomenon.

[0017] According to the above scheme, the utility model still includes bean bin, the bean bin is installed on the upper port of main machine thereby with grinding assembly is arranged in pairs. The bean bin is used for providing coffee beans to the grinding assembly, when there is bean in the bean bin, the output current of the driving motor is stable, the fluctuation range is very small, when there is no bean in the bean bin, the movable cutter disc and the fixed cutter disc are in the idling mode, the output current of the driving motor is minimum, the current detection module sends a signal, and the controller can automatically close the driving motor, energy consumption is saved, and the service life of the coffee grinder is improved.

[0018] The utility model discloses an automatic adjustment knife gap's coffee grinder, adjusting motor can drive grinding assembly through adjusting mechanism, adjusting motor can make grinding gap tend to 0 through adjusting mechanism, when this, adjusting motor's output current tends to peak value, the controller according to the signal of current detection module, make adjusting motor reverse, reach the set value through adjusting mechanism to grinding gap, thereby realize the purpose of automatic control grinding fineness, when coffee bean grinds, the output current of the driving motor is lowest, the controller according to the signal of current detection module automatically closes the driving motor, thereby realize the purpose of saving energy consumption and improving equipment service life. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the overall cross section structure schematic diagram of the utility model;

[0020] Figure 2 It isFigure 1 A part of the enlarged structure schematic view;

[0021] Figure 3 The grinding assembly and the adjusting mechanism are split structure schematic view of the utility model.

[0022] In the figure:

[0023] 1, main machine;2, grinding gap;3, moving cutter head;11, drive motor;12, controller;13, fixed cutter head;14, centering shaft sleeve;15, bean bin;21, adjusting motor;22, rotating support;23, lifting support;24, assembly support;25, passive pinion;26, drive gear;27, transmission flower teeth;28, transmission key. DETAILED DESCRIPTION

[0024] The technical scheme of the utility model will be described below in combination with the drawings and embodiments.

[0025] As Figures 1-3 indicated, the utility model discloses a kind of automatic adjustment tool gap's coffee grinder, including main machine 1, the main machine 1 is equipped with grinding assembly, drive motor 11 and controller 12, drive motor 11 is connected with grinding assembly transmission;The grinding assembly includes fixed cutter head 13 and moving cutter head 3, fixed cutter head 13 and moving cutter head 3 form grinding gap 2 between, main machine 1 is equipped with adjusting motor 21 and adjusting mechanism, adjusting motor 21 drives grinding assembly by adjusting mechanism to change the size of the grinding gap 2;The current detection module is equipped on the controller 12, and controller 12 is connected drive motor 11 and adjusting motor 21 by line respectively.The current detection module on the controller 12 can detect the working current of drive motor 11 and adjusting motor 21, and according to current signal carries out logic judgment, adjusting motor 21 is used to drive grinding assembly to change grinding gap 2, and grinding assembly can be ground coffee bean by relative rotation, and grinding gap 2 represents the grinding fineness of grinding assembly.When main machine 1 starts to work, adjusting motor 21 is started simultaneously by adjusting mechanism drive grinding assembly, so that grinding gap 2 tends to minimum (limit value is 0), the frictional resistance between grinding assembly is maximum at this time, and the output current of adjusting motor 21 approaches peak value, and current detection module sends signal to controller 12, and controller 12 controls adjusting motor 21 reverse, and then adjusting motor 21 drives grinding assembly to control grinding gap 2 to set value.

[0026] It can be understood that when the grinding gap 2 is from 0 to a set value, it can be realized by adjusting the stroke control of the motor 21, so that the utility model can automatically and accurately control the grinding gap 2, thereby making the grinding fineness of coffee beans more accurate and stable. Further, by adjusting the motor 21 and adjusting the structure to drive the grinding assembly to control the grinding gap 2, high assembly accuracy is not required during assembly, and even if there is a small amount of machining error between the parts, stable and accurate particle fineness can be obtained after the grinding gap 2 is calibrated.

[0027] Further, after the grinding gap 2 is determined, the driving motor 11 drives the grinding assembly to rotate relative to the ground coffee beans, and after the coffee beans are ground, the grinding assembly idles so that the output current of the driving motor 11 tends to be minimum, and the current detection module turns off the driving motor 11 according to the current change of the driving motor 11 through the controller 12, thereby saving energy consumption and prolonging the service life of the equipment.

[0028] The fixed knife disc 13 is fixedly connected to the output shaft of the driving motor 11; the adjusting mechanism is connected with the movable knife disc 3 in a matched manner, so that the movable knife disc 3 is movably sleeved on the fixed knife disc 13, and the grinding gap 2 is formed between the movable knife disc 3 and the fixed knife disc 13. The driving motor 11 is fixedly arranged in the main machine 1, and the output shaft of the driving motor 11 is connected to the fixed knife disc 13 to drive the rotation of the fixed knife disc 13; the outer wall of the fixed knife disc 13 is formed with grinding teeth, the movable knife disc 3 is sleeved on the fixed knife disc 13, the inner wall of the movable knife disc 3 is formed with grinding teeth, and the above-mentioned grinding gap 2 is the distance between the grinding teeth on the movable knife disc 3 and the fixed knife disc 13. Under the driving of the driving motor 11, the fixed knife disc 13 can rotate relative to the movable knife disc 3, so as to crush the coffee beans through the grinding teeth between the two. Further, the movable knife disc 3 can move up and down relative to the fixed knife disc 13, so as to adjust the size of the grinding gap 2 to obtain different coffee powder fineness.

[0029] The adjusting mechanism comprises a rotating support 22 and a lifting support 23, the rotating support 22 is rotatably arranged in the upper end of the main machine 1, and the inner wall of the rotating support 22 is provided with internal threads; the outer wall of the lifting support 23 is provided with external threads, the lifting support 23 is arranged in the rotating support 22, and the lifting support 23 and the rotating support 22 are in transmission connection through the internal threads and the external threads, and the movable knife disc 3 is fixedly arranged on the lifting support 23. The rotating support 22 drives the lifting support 23 to move up and down through thread transmission, and the thread transmission can finely control the stroke of the movable knife disc 3 through different pitches, so as to realize accurate adjustment of the grinding fineness.

[0030] The upper end of the host 1 is provided with a centering shaft sleeve 14, the lower end of the lifting support 23 is provided in the centering shaft sleeve 14, and the lifting support 23 and the centering shaft sleeve 14 are in sliding fit through a key groove. Specifically, the lower end of the lifting support 23 is concentrically arranged in the centering shaft sleeve 14, so that the movable cutter head 3, the lifting support 23 and the fixed cutter head 13 are concentrically arranged, and the lifting support 23 is in sliding fit with the centering shaft sleeve 14 through the key groove. When the rotating support 22 rotates, the lifting support 23 can be driven to slide up and down through the threaded transmission, so as to adjust the grinding gap 2 between the movable cutter head 3 and the fixed cutter head 13.

[0031] The rotating support 22 is provided with an assembly support 24, the assembly support 24 is provided in the lifting support 23 and is fixedly connected thereto, the movable cutter head 3 is provided in the assembly support 24 and is arranged in pairs with the fixed cutter head 13. It can be understood that the movable cutter head 3 is usually made of high-cost materials, while the lifting support 23, the assembly support 24 and the rotating support 22 are only structural parts and have relatively low cost. Generally, in order to make the installation space inside the equipment, the caliber of the above-mentioned rotating support 22 and lifting support 23 is large. The assembly support 24 is used to install the movable cutter head 3 in the rotating support 22, and the assembly support 24 can fill the space between the movable cutter head 3 and the lifting support 23, and is also convenient for the structural design of each part.

[0032] The rotating support 22 is provided with a driven gear 25, which is rotatably arranged in the upper end of the host 1; the adjusting motor 21 is arranged on one side of the driven gear 25, and the output shaft of the adjusting motor 21 is provided with a driving gear 26, which is in meshing connection with the driven gear 25. As described above, the rotating support 22 and the lifting support 23 are in threaded transmission, the rotating motion of the rotating support 22 is converted into the up-and-down motion of the lifting support 23, and the grinding gap 2 between the movable cutter head 3 and the fixed cutter head 13 can be finely adjusted according to the threaded transmission. Further, the adjusting motor 21 drives the driven gear 25 to rotate through the driving gear 26, and through the gear transmission ratio between the two, the high speed of the adjusting motor 21 can be changed into low speed, and stroke control can be realized, and then the lifting support 23 and the movable cutter head 3 are driven to move up and down by the rotating support 22, so as to realize the accurate adjustment of the grinding gap 2.

[0033] The outer wall of the rotating support 22 is provided with a transmission flower tooth 27, and the inner wall of the driven gear 25 is provided with a plurality of transmission keys 28, the transmission keys 27 engage the transmission keys 28 so that the driven gear 25 and the rotating support 22 can synchronously rotate. The rotating support 22 and the driven gear 25 are connected through the transmission flower tooth 27 and the transmission keys 28, so that the rotating support 22 and the driven gear 25 can move up and down, when the grinding gap 2 between the moving knife disc 3 and the fixed knife disc 13 approaches 0, the rotating support 22 can move up and down to prevent the moving knife disc 3 and the fixed knife disc 13 from being locked or from appearing the tooth striking phenomenon.

[0034] The utility model also includes bean storehouse 15, bean storehouse 15 installs on the upper port of host computer 1 to set up with the grinding assembly pairing. Bean storehouse 15 is used to provide coffee beans to the grinding assembly, when there is bean in bean storehouse 15, the output current of drive motor 11 is stable, and the fluctuation range is very small, when there is no bean in bean storehouse 15, the moving knife disc 3 and the fixed knife disc 13 are in the idle mode, the output current of drive motor 11 is minimum, the current detection module sends a signal, and the controller 12 can automatically close drive motor 11, save energy consumption, and improve the service life of the coffee grinder.

[0035] The above is only the preferred embodiment of the utility model, therefore, equivalent changes or modifications made according to the structure, features and principles of the utility model patent application range are included in the utility model patent application range.

Claims

1. A coffee grinder capable of automatically adjusting the gap between the cutter, comprising a main machine (1), a grinding assembly, a driving motor (11) and a controller (12) provided on the main machine (1), and the driving motor (11) is in transmission connection with the grinding assembly; characterized in that, the grinding assembly comprises a fixed cutter disc (13) and a movable cutter disc (3), and the grinding gap (2) is formed between the fixed cutter disc (13) and the movable cutter disc (3); the main machine (1) is provided with an adjusting motor (21) and an adjusting mechanism, and the adjusting motor (21) drives the grinding assembly through the adjusting mechanism to change the size of the grinding gap (2); the controller (12) is provided with a current detection module, and the controller (12) is connected with the driving motor (11) and the adjusting motor (21) through lines.

2. A bean grinder with an automatically adjusted tool gap according to claim 1, characterized in that The fixed cutter disc (13) is fixedly connected with the output shaft of the driving motor (11), and the adjusting mechanism is in matched connection with the movable cutter disc (3), so that the movable cutter disc (3) is movably sleeved on the fixed cutter disc (13), and then the grinding gap (2) is formed between the movable cutter disc (3) and the fixed cutter disc (13).

3. A bean grinder with an automatically adjusted tool gap according to claim 2, characterized in that The adjusting mechanism comprises a rotating bracket (22) and a lifting bracket (23), the rotating bracket (22) is rotatably arranged in the upper port of the main machine (1), and the inner wall of the rotating bracket (22) is provided with an internal thread; the outer wall of the lifting bracket (23) is provided with an external thread, the lifting bracket (23) is arranged in the rotating bracket (22), and the lifting bracket (23) and the rotating bracket (22) are in transmission connection through the internal thread and the external thread, and the movable cutter disc (3) is fixedly arranged on the lifting bracket (23).

4. A bean grinder with an automatically adjusted tool gap according to claim 3, characterized in that The upper port of the main machine (1) is provided with a centering shaft sleeve (14), the lower end of the lifting bracket (23) is arranged in the centering shaft sleeve (14), and the lifting bracket (23) and the centering shaft sleeve (14) are in sliding fit through the key groove.

5. A bean grinder with an automatically adjusted tool gap according to claim 3, characterized in that The rotating bracket (22) is provided with an assembly bracket (24), the assembly bracket (24) is arranged in the lifting bracket (23) and fixedly connected therewith, the movable cutter disc (3) is arranged in the assembly bracket (24) and arranged in pair with the fixed cutter disc (13).

6. A bean grinder with an automatically adjusted tool gap according to claim 3, characterized in that The rotating bracket (22) is provided with a driven gear (25), and the driven gear (25) is rotatably arranged in the upper port of the main machine (1); the adjusting motor (21) is arranged on one side of the driven gear (25), the output shaft of the adjusting motor (21) is provided with a driving gear (26), and the driving gear (26) is in meshing connection with the driven gear (25).

7. A bean grinder with an automatically adjusted tool gap according to claim 6, characterized in that The outer wall of the rotating bracket (22) is provided with a transmission gear (27), and the inner wall of the driven gear (25) is provided with a plurality of transmission keys (28), the transmission keys (28) mesh with the transmission gear (27) so that the driven gear (25) and the rotating bracket (22) can synchronously rotate.

8. The bean grinder automatically adjusting a tool gap according to claim 1, wherein, It also comprises a bean bin (15), which is mounted on the upper port of the main machine (1) and arranged in pair with the grinding assembly.

Images