Bean grinder

Abstract

The utility model relates to the technical field of household appliances, and discloses a bean grinder which comprises a grinder body, a main shaft, an inner cutter head and a fixing piece, the grinder body comprises a main body and an outer cutter head, and the outer cutter head is installed on the main body; a bean grinding cavity is formed in the outer cutter head, the main shaft is rotationally connected to the main body, extends into the bean grinding cavity and comprises a first limiting step and a first side limiting surface, and the first limiting step faces the lower end of the main shaft; the inner cutterhead is located in the bean grinding cavity, a mounting through hole is formed in the middle of the inner cutterhead, the lower end of the main shaft penetrates through the mounting through hole, the inner cutterhead comprises a second side limiting surface, and the second side limiting surface is located on the hole wall of the mounting through hole; the first side limiting face abuts against the second side limiting face, so that the inner cutter head and the main shaft can rotate synchronously. The fixing piece comprises an abutting face, the fixing piece is detachably connected to the main shaft, and the first limiting step and the abutting face jointly clamp the inner cutter head. Therefore, the inner cutterhead is easy to disassemble and assemble relative to the machine body.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a coffee bean grinder. Background Art

[0002] A bean grinder can be used to grind beans, such as coffee beans, so that users can make their own coffee in daily life.

[0003] In the related art, the bean grinder includes a body and an inner blade disc, which is rotatably connected to the body. The inner blade disc can be manually driven by the user through a joystick or by a motor; the body is provided with a grinding chamber, and the inner blade disc is placed in the grinding chamber. The outer side of the inner blade disc and the inner wall of the grinding chamber are provided with blades. When the inner blade disc rotates relative to the body, the blades on the inner blade disc and the blades in the grinding chamber can grind the beans in the grinding chamber, and the ground bean powder is discharged from the lower end of the grinder.

[0004] However, during operation, the blades on the inner blade disc of the grinder may wear out or bean scraps may adhere to the surface, requiring the inner blade disc to be disassembled relative to the machine body. Generally, there are many parts connected to the inner blade disc, making it difficult to disassemble and assemble the inner blade disc. Utility Model Content

[0005] The embodiment of the present utility model aims to provide a coffee bean grinder to solve the technical problem of difficulty in disassembling and assembling the inner cutter disc in the prior art.

[0006] The present invention solves the technical problem by adopting the following technical solutions:

[0007] A coffee bean grinder is provided, comprising:

[0008] The machine body includes a main body and an outer cutter disc, and the outer cutter disc is mounted on the main body; the outer cutter disc is provided with a grinding chamber;

[0009] a main shaft rotatably connected to the main body, extending into the grinding chamber, and comprising a first limiting step and a first side limiting surface, wherein the first limiting step faces the lower end of the main shaft;

[0010] An inner cutter disc, the inner cutter disc being located within the grinding chamber, a mounting through-hole being defined in the middle of the inner cutter disc, the lower end of the spindle being passed through the mounting through-hole, the inner cutter disc including a second side limiting surface located on the wall of the mounting through-hole; the first side limiting surface abutting against the second side limiting surface, enabling the inner cutter disc and the spindle to rotate synchronously;

[0011] A fixing member, which is detachably connected to the lower end of the main shaft, and the fixing member includes an abutment surface, the first limiting step abuts the upper surface of the inner cutter disc, the abutment surface abuts the lower surface of the inner cutter disc, and the first limiting step and the abutment surface jointly clamp the inner cutter disc.

[0012] In some embodiments, the grinder further comprises an elastic member, the main body defines a mounting cavity, the main body comprises a mounting bracket, the upper end of the mounting cavity penetrates the upper surface of the main body, the lower end of the mounting cavity communicates with the grinding chamber, the mounting bracket is located within the mounting cavity, the mounting bracket is connected to the cavity wall of the mounting cavity, and the spindle is rotatably connected to the mounting bracket;

[0013] The mounting frame is provided with an accommodating cavity, and the main shaft is passed through the accommodating cavity from top to bottom. The main shaft includes a second limiting step, and the second limiting step and the elastic member are placed in the accommodating cavity. The lower end of the elastic member abuts against the second limiting step, and the upper end of the elastic member abuts against the top cavity wall of the accommodating cavity; the elastic member is in a compressed state, so that the second limiting step presses against the bottom cavity wall of the accommodating cavity.

[0014] In some embodiments, the fixing member is a screw, the fixing member includes a nut, and the abutment surface is provided on a side of the nut facing the inner cutter disc.

[0015] In some embodiments, the outer cutter disc is provided with a feed inlet and a discharge outlet. From top to bottom, the feed inlet, the grinding chamber, and the discharge outlet are arranged in sequence and adjacent ones are connected to each other. The feed inlet passes through the upper end of the outer cutter disc, and the discharge outlet passes through the lower end of the outer cutter disc.

[0016] The grinding chamber is in a truncated cone shape, and the area of ​​the discharge port is larger than that of the feed port; the inner cutter disc is in a truncated cone shape, and the area of ​​the lower surface of the inner cutter disc is larger than that of the lower surface of the inner cutter disc;

[0017] The outer cutter disc is located at the bottom of the main body. When the fixing member is disassembled relative to the main shaft, the inner cutter disc can extend from the outside of the machine body through the discharge port into the bean grinding chamber, or from the inside of the grinding chamber through the discharge port out of the machine body.

[0018] In some embodiments, at least two positioning blind holes are provided on the lower surface of the inner cutter disc, and all of the positioning blind holes are circumferentially distributed along the rotation axis of the inner cutter disc.

[0019] In some embodiments, the body further includes an adjusting knob, the adjusting knob being rotatably connected to the outer circumferential side surface of the main body, the rotation axis of the adjusting knob being colinear with the rotation axis of the main shaft; the adjusting knob being sleeved on the outer cutter disc, the inner surface of the adjusting knob being threadedly connected to the outer surface of the outer cutter disc; the main body includes a guide member, the outer cutter disc is provided with a guide groove, and the guide member is embedded in the corresponding guide groove;

[0020] During the rotation of the adjusting knob, the adjusting knob drives the outer cutter disc to move relative to the main body along the direction of the rotation axis of the adjusting knob, and the guide member moves in the guide groove.

[0021] In some embodiments, the outer cutter disc includes at least two side protrusion blocks, and the side protrusion blocks protrude from the outer surface of the outer cutter disc; the inner surface of the adjusting knob is threadedly connected to the side of the side protrusion block that is away from the central axis of the outer cutter disc; all the side protrusion blocks are circumferentially distributed on the outer cutter disc, and the guide groove is formed between two adjacent side protrusion blocks.

[0022] In some embodiments, the coffee grinder further comprises a rocker assembly, wherein the rocker assembly is detachably connected to the upper end of the main shaft;

[0023] The rocker assembly includes an end cover and a rocker portion. The end cover is detachably connected to the upper end of the main shaft, and the end cover is arranged on the upper end of the main body; the rocker portion is connected to one side of the end cover and protrudes toward the side of the end cover.

[0024] In some embodiments, the main shaft includes a rotation limiting portion, which is located at the upper end of the main shaft. The end cover is provided with a plug-in slot, and the rotation limiting portion is plugged into the plug-in slot so that the end cover and the main shaft can rotate synchronously.

[0025] In some embodiments, the rotation limiting portion is a hexagonal prism structure, and the slot wall of the plug-in slot is provided with a rotation limiting groove, the number of the rotation limiting grooves is at least 2 times of 6, and the rotation limiting grooves are evenly distributed on the slot wall of the plug-in slot along the circumference of the plug-in slot; each corner of the rotation limiting portion is placed in a corresponding rotation limiting groove.

[0026] Compared with the existing technology, when the user uses the bean grinder, the outer blade disc and the inner blade disc can continuously grind the beans, such as coffee beans, located between the inner blade disc and the outer blade disc, so that the beans are ground into powder. The blade of the inner blade disc may wear out when contacting and cutting the beans, resulting in a decrease in the sharpness of the blade of the inner blade disc, and the inner blade disc needs to be replaced; at this time, the user only needs to twist the fixing part so that the fixing part falls off relative to the main shaft, and then remove the inner blade disc from the lower end of the main shaft to complete the disassembly of the inner blade disc; then put the new inner blade disc on the main shaft, and finally tighten the fixing part relative to the main shaft to complete the replacement of the inner blade disc. During the entire disassembly and assembly process of the inner blade disc, only the inner blade disc and a part for connection need to be operated, so that the disassembly and assembly of the inner blade disc is more convenient; and during the replacement process of the inner blade disc, the parts are not easily lost.

[0027] At the same time, the first side limit surface abuts against the second side limit surface, so that the inner cutter disc cannot rotate relative to the main shaft. The main shaft and the inner cutter disc can rotate synchronously, and the inner cutter disc can maintain a stable rotation speed, which is conducive to grinding the beans more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] One or several embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0029] Figure 1 This is a perspective view of a coffee bean grinder according to one embodiment of the present invention;

[0030] Figure 2 yes Figure 1 A cross-sectional view of the grinder in [Image file].

[0031] Figure 3 yes Figure 1 An exploded view of the grinder in [Image file name].

[0032] Figure 4 This is a perspective view of the main shaft, inner cutter disc, and fixing member of the coffee bean grinder in another embodiment of the present invention when separated from each other;

[0033] Figure 5 yes Figure 1 A cross-sectional view of the mounting bracket of the grinder;

[0034] Figure 6 yes Figure 1 A three-dimensional view of the grinder's adjustment knob, outer burr disc, and part of the main body;

[0035] Figure 7 yes Figure 1 A cross-sectional view of the adjustment knob of the grinder in Figure 1;

[0036] Figure 8 is a perspective view of the main shaft and rocker assembly of the coffee bean grinder in another embodiment of the present invention when separated from each other;

[0037] Figure 9 This is a partial enlarged view of the rotation limit portion and the insertion slot of the coffee bean grinder in another embodiment of the present invention.

[0038] Reference numerals:

[0039] 100, bean grinder; 10, body; 12, main body; 122, guide member; 124, mounting bracket; 1242, accommodating chamber; 1202, mounting chamber; 14, outer blade; 142, inner blade; 144, side protrusion; 1402, grinding chamber; 1404, feed port; 1406, discharge port; 1408, guide slot; 16, adjustment knob; 20, spindle; 22, first stop step; 24, first side stop surface ; 26. Second limiting step; 28. Rotation limiting part; 30. Inner cutter disc; 32. Main body; 322. Second side limiting surface; 3202. Mounting through hole; 3204. Positioning blind hole; 34. Outer blade; 40. Fixing part; 42. Abutment surface; 44. Nut; 50. Elastic part; 60. Rocker assembly; 62. End cover; 6202. Insertion slot; 6204. Rotation limiting slot; 64. Rocker part; 642. Rotation handle. DETAILED DESCRIPTION

[0040] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" used in this specification indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0042] The following describes in detail a coffee bean grinder 100 provided in an embodiment of the present application through a specific embodiment in conjunction with all the drawings in the specification.

[0043] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 In one embodiment of the present invention, a bean grinder 100 is disclosed, including a body 10, a main shaft 20, an inner cutter disc 30 and a fixing member 40. The body 10 includes a main body 12 and an outer cutter disc 14, and the outer cutter disc 14 is mounted on the main body 12; the outer cutter disc 14 is provided with a bean grinding chamber 1402.

[0044] The main shaft 20 is rotatably connected to the main body 12 and extends into the grinding chamber 1402 . The main shaft 20 includes a first limiting step 22 and a first side limiting surface 24 . The first limiting step 22 faces the lower end of the main shaft 20 .

[0045] The inner cutter disc 30 is located within the grinding chamber 1402. A mounting hole 3202 is defined in the center of the inner cutter disc 30. The lower end of the spindle 20 passes through the mounting hole 3202. The inner cutter disc 30 includes a second side limiting surface 322 located on the wall of the mounting hole 3202. The first side limiting surface 24 abuts the second side limiting surface 322, allowing the inner cutter disc 30 and the spindle 20 to rotate synchronously.

[0046] The fixing member 40 is detachably connected to the lower end of the main shaft 20. The fixing member 40 includes an abutment surface 42. The first limiting step 22 abuts against the upper surface of the inner cutter disc 30. The abutment surface 42 abuts against the lower surface of the inner cutter disc 30. The first limiting step 22 and the abutment surface 42 jointly clamp the inner cutter disc 30.

[0047] Through the above structure, when the user uses the bean grinder 100, the outer blade disc 14 and the inner blade disc 30 can continuously grind the beans, such as coffee beans, located between the inner blade disc 30 and the outer blade disc 14, so that the beans are ground into powder. The blade of the inner blade disc 30 may wear out when contacting and cutting the beans, resulting in a decrease in the sharpness of the blade of the inner blade disc 30, and the inner blade disc 30 needs to be replaced; at this time, the user only needs to disassemble the fixing member 40 relative to the main shaft 20 so that the fixing member 40 falls off relative to the main shaft 20, and then remove the inner blade disc 30 from the lower end of the main shaft 20 to complete the disassembly of the inner blade disc 30; then, the new inner blade disc 30 is placed on the main shaft 20, and finally, the fixing member 40 is connected to the main shaft 20 to complete the replacement of the inner blade disc 30. During the entire disassembly and assembly process of the inner cutter disc 30, only the inner cutter disc 30 and a part for connection need to be operated, thereby making the disassembly and assembly of the inner cutter disc 30 more convenient; and during the replacement process of the inner cutter disc 30, parts are not easily lost.

[0048] At the same time, the first side limiting surface 24 abuts against the second side limiting surface 322, so that the inner cutter disc 30 cannot rotate relative to the main shaft 20. The main shaft 20 and the inner cutter disc 30 can rotate synchronously, and the inner cutter disc 30 can maintain a stable rotation speed, which is conducive to grinding the beans more evenly.

[0049] Specifically, the inner blade disc 30 includes a body 32 and an outer blade 34, which is connected to the outer side of the body 32. The outer blade disc 14 includes an inner blade 142, which is connected to the inner wall of the grinding chamber 1402. In this embodiment, the body 12 can be cylindrical in structure, with the outer blade disc 14 embedded in the lower portion of the body 12. A knob can be provided between the outer blade disc 14 and the body 12, which, when turned, can move the outer blade disc 14 up and down relative to the body 12. The grinding chamber 1402 is truncated, with the central axis of the grinding chamber 1402 perpendicular to the horizontal plane. There are multiple inner blades 142, which are arranged on the side wall of the grinding chamber 1402 at an angle relative to the horizontal plane and are evenly distributed circumferentially relative to the central axis of the grinding chamber 1402.

[0050] The spindle 20 is cylindrical in structure and rotatably connected to the interior of the main body 12 via a bearing. The upper end of the spindle 20 extends beyond the upper end of the main body 12 and can be connected to a motor or a manual rocker. The nut 42 is a hexagonal prism-like structure with a hexagonal hole in the middle. The surface of the nut 42 facing the inner cutter disc 30 is flat, allowing the first stop 22 and the nut 42 to more stably clamp the inner cutter disc 30. The inner cutter disc 30 is a frustum-shaped structure, and its dimensions are adapted to the dimensions of the grinding chamber 1402.

[0051] In other embodiments, the main body 12 as a whole may also be in other shapes, such as a rectangular parallelepiped; and the outer cutter head 14 may also be fixedly connected to the main body 12 .

[0052] Specifically, in this embodiment, the fixing member 40 is a hexagon socket screw, which includes a nut having a structure similar to a cylinder. The abutment surface 42 is located on the nut, and the nut is partially embedded in the lower surface of the body 32, so that the user can more easily loosen or tighten the fixing member 40 from one side of the fuselage 10 using a hexagon socket wrench; the first limiting step 22 is an annular plane, and the first limiting step 22 is arranged parallel to the horizontal plane.

[0053] In other embodiments, the fixing member 40 may also be other structures, such as a nut, and the abutting surface 42 is an end surface of the nut; or the fixing member 40 may also be a clamping block, and the fixing member 40 is clamped to the lower end of the main shaft 20.

[0054] Specifically, in this embodiment, the first side limiting surface 24 and the second side limiting surface 322 are both perpendicular to the horizontal plane, and are both rectangular planar structures; the number of first side limiting surfaces 24 is two, and the two first side limiting surfaces 24 are respectively located on opposite sides of the main shaft 20; correspondingly, the number of second side limiting surfaces 322 is also two, and the two second side limiting surfaces 322 are symmetrically distributed on both sides of the central axis of the mounting through hole 3202.

[0055] In other embodiments, the first side limiting surface 24 and the second side limiting surface 322 may also be other structures, such as planes inclined relative to a horizontal plane.

[0056] Please refer to Figure 5 In some embodiments, the coffee bean grinder 100 further includes an elastic member 50. The main body 12 defines a mounting cavity 1202. The main body 12 includes a mounting bracket 124. The upper end of the mounting cavity 1202 passes through the upper surface of the main body 12. The lower end of the mounting cavity 1202 communicates with the grinding chamber 1402. The mounting bracket 124 is located within the mounting cavity 1202. The mounting bracket 124 is connected to the cavity wall of the mounting cavity 1202. The spindle 20 is rotatably connected to the mounting bracket 124.

[0057] The mounting frame 124 is provided with a accommodating cavity 1242, and the main shaft 20 is arranged in the accommodating cavity 1242 from top to bottom. The main shaft 20 includes a second limiting step 26, and the second limiting step 26 and the elastic member 50 are placed in the accommodating cavity 1242. The lower end of the elastic member 50 abuts against the second limiting step 26, and the upper end of the elastic member 50 abuts against the top cavity wall of the accommodating cavity 1242; the elastic member 50 is in a compressed state, so that the second limiting step 26 presses against the bottom cavity wall of the accommodating cavity 1242.

[0058] Through the above structure, the mounting frame 124 is used to support the main shaft 20 so that the main shaft 20 will not shake during rotation. After the bean grinder 100 grinds the beans, some residual bean dregs will adhere to the inner cutter disc 30 and the outer cutter disc 14. The user touches the lower surface of the body 32 and presses the inner cutter disc 30 upward, so that the inner cutter disc 30 and the main shaft 20 move upward relative to the mounting frame 124. The second limit step 26 moves upward, driving the elastic member 50 to compress. The user then removes the pressure on the lower surface of the body 32, and the elastic member 50 returns to its original position, driving the second limit step 26 to move downward until it contacts the bottom wall of the accommodating cavity 1242, causing the inner cutter disc 30 to shake, thereby shaking off the bean dregs between the inner cutter disc 30 and the outer cutter disc 14.

[0059] Specifically, the accommodating cavity 1242 has a structure similar to a cylinder, the second limiting step 26 has an annular sheet structure, the shape of the second limiting step 26 is adapted to the shape of the cross section of the accommodating cavity 1242, and the side surface of the second limiting step 26 can contact the inner cavity wall of the accommodating cavity 1242.

[0060] The mounting cavity 1202 has a structure similar to a cylinder, and the mounting frame 124 has a structure similar to a hollow cylinder. The central axis of the mounting cavity 1202 is collinear with the rotation axis of the main shaft 20. The main shaft 20 is passed through the mounting frame 124 and is rotatably connected to the mounting frame 124 through a bearing. The opposite sides of the mounting frame 124 are each connected to the inner cavity wall of the mounting cavity 1202 through a sheet structure.

[0061] In this embodiment, the elastic member 50 is a spring, and the elastic member 50 is sleeved on the main shaft 20; in other embodiments, the elastic member 50 can also be other structures, such as a spring.

[0062] In some embodiments, the fixing member 40 is a screw, and the fixing member 40 includes a nut. The abutment surface 42 is disposed on a side of the nut 44 facing the inner cutter disc 30 .

[0063] Through the above structure, the fixing member 40 is a screw, so that the fixing member 40 is easy to be disassembled or installed relative to the main shaft 20; in addition, the nut 44 can directly abut against the lower surface of the inner cutter head 30.

[0064] Specifically, in this embodiment, the nut 44 is a structure similar to a cylinder. In other embodiments, the nut 44 can also be other structures, such as a structure similar to a hexagonal prism.

[0065] Please refer back to Figure 2 In some embodiments, the outer cutter disc 14 is provided with a feed port 1404 and a discharge port 1406. From top to bottom, the feed port 1404, the grinding chamber 1402, and the discharge port 1406 are arranged in sequence and adjacent ones are connected to each other. The feed port 1404 passes through the upper end of the outer cutter disc 14, and the discharge port 1406 passes through the lower end of the outer cutter disc 14.

[0066] The bean grinding chamber 1402 has a truncated cone structure, and the area of ​​the discharge port 1406 is larger than the area of ​​the feed port 1404 ; the inner cutter disc 30 has a truncated cone structure, and the area of ​​the lower surface of the inner cutter disc 30 is larger than the area of ​​the lower surface of the inner cutter disc 30 .

[0067] The outer cutter disc 14 is located at the bottom of the main body 12. When the fixing member 40 is removed relative to the main shaft 20, the inner cutter disc 30 can extend from the outside of the machine body 10 through the discharge port 1406 into the bean grinding chamber 1402, or from the inside of the grinding chamber 1402 through the discharge port 1406 and extend out of the machine body 10.

[0068] With the above structure, after the fixing member 40 is removed from the main shaft 20, the inner cutter disc 30 can be directly extended from the inside of the grinding chamber 1402 through the discharge port 1406 and out of the machine body 10. Then, a new inner cutter disc 30 can be extended from the outside of the machine body 10 through the discharge port 1406 and into the grinding chamber 1402, making replacement of the inner cutter disc 30 more convenient.

[0069] In addition, the area of ​​the discharge port 1406 is larger than the area of ​​the feed port 1404, and the shape of the inner cutter disc 30 is adapted to the shape of the grinding chamber 1402, so that the area of ​​the upper surface of the body 32 is smaller than the area of ​​the discharge port 1406; so that when the body 32 is disassembled relative to the spindle 20, the user can easily remove the inner cutter disc 30 from the discharge port 1406, and at the same time, the user can easily insert a new inner cutter disc 30 from the discharge port 1406 into the grinding chamber 1402.

[0070] Specifically, the upper end of the bean grinding chamber 1402 is connected to the feed port 1404, and the lower end of the bean grinding chamber 1402 is connected to the discharge port 1406. The area of ​​the discharge port 1406 is larger than the area of ​​the feed port 1404; the shape of the inner cutter disc 30 is also a frustum adapted to the bean grinding chamber 1402.

[0071] In some embodiments, at least two positioning blind holes 3204 are provided on the lower surface of the inner cutter disc 30 , and all positioning blind holes 3204 are circumferentially distributed about the rotation axis of the inner cutter disc 30 .

[0072] Through the above structure, during the processing of the inner cutter disc 30, the processing equipment can extend into the two positioning blind holes 3204 to fix the inner cutter disc 30 relative to the processing equipment, and then the inner cutter disc 30 will not shake relative to the processing equipment during the processing, so that the processing accuracy of the outer blade 34 is higher; in addition, when the same processing equipment processes multiple inner cutter discs 30 in succession, the processing starting position and processing ending position of the multiple inner cutter discs 30 are consistent, so that the shapes and sizes of all the inner cutter discs 30 processed by the same processing equipment can have higher consistency.

[0073] Specifically, in this embodiment, the positioning blind hole 3204 is a circular blind hole, the central axis of the positioning blind hole 3204 is perpendicular to the horizontal plane, there are two positioning blind holes 3204, and the two positioning blind holes 3204 are respectively arranged on opposite sides of the rotation axis of the body 32.

[0074] In other embodiments, the positioning blind holes 3204 may also be in other shapes, such as rectangular blind holes; the number of the positioning blind holes 3204 may also be other shapes, such as three or four.

[0075] Please refer to Figure 6 and Figure 7 In some embodiments, the body 10 further includes an adjusting knob 16, which is rotatably connected to the outer circumferential side of the main body 12, and the rotation axis of the adjusting knob 16 is collinear with the rotation axis of the main shaft 20; the adjusting knob 16 is sleeved on the outer cutter disc 14, and the inner surface of the adjusting knob 16 is threadedly connected to the outer surface of the outer cutter disc 14; the main body 12 includes a guide member 122, and the outer cutter disc 14 is provided with a guide groove 1408, and the guide member 122 is embedded in the corresponding guide groove 1408.

[0076] During the rotation of the adjusting knob 16 , the adjusting knob 16 drives the outer cutter head 14 to move relative to the main body 12 along the direction of the rotation axis of the adjusting knob 16 , and the guide member 122 moves in the guide groove 1408 .

[0077] Through the above structure, the user turns the adjustment knob 16, and the adjustment knob 16 rotates relative to the outer blade disc 14. At the same time, the guide member 122 abuts against the groove wall of the guide groove 1408 and guides and limits the outer blade disc 14. The outer blade disc 14 moves upward or downward relative to the main body 12 to adjust the distance between the inner blade 142 and the outer blade 34, thereby adjusting the size of the particles formed after the beans are ground.

[0078] Specifically, the adjusting knob 16 can be rotatably connected to the main body 12 through a bearing. The outer surface of the adjusting knob 16 is protruded from the outside of the body 10, and the adjusting knob 16 is engraved with a scale. The scale on the adjusting knob 16 is used for customers to observe and understand the size of the ground bean particles.

[0079] In some embodiments, the outer cutter disc 14 includes at least two side protrusion blocks 144, and the side protrusion blocks 144 protrude from the outer circumferential side surface of the outer cutter disc 14; the inner surface of the adjusting knob 16 is threadedly connected to the side of the side protrusion block 144 that is away from the central axis of the outer cutter disc 14; all the side protrusion blocks 144 are distributed circumferentially on the outer cutter disc 14, and a guide groove 1408 is formed between two adjacent side protrusion blocks 144.

[0080] Through the above structure, the guide member 122 can simultaneously abut against the side protrusion block 144 and the outer surface of the outer blade disc 14, and the number of the side protrusion blocks 144 is equal to the number of the guide grooves 1408, so that there are at least two guide members 122; so that when the outer blade disc 14 moves in the vertical direction relative to the main body 12, the outer blade disc 14 can be more stable, thereby improving the grinding accuracy of the beans.

[0081] Specifically, in this embodiment, the guide member 122 can be an arc-shaped block structure, and the side protrusion block 144 is also an arc-shaped block structure. The height of the side protrusion block 144 is less than the height of the guide member 122. The number of side protrusion blocks 144 is three, and the spacing between two adjacent side protrusion blocks 144 is equal.

[0082] In other embodiments, the number of the side protrusion blocks 144 may be other numbers, such as two or four.

[0083] Please refer to Figure 8 and Figure 9 In some embodiments, the coffee bean grinder 100 further includes a rocker assembly 60 , which is detachably connected to the upper end of the main shaft 20 .

[0084] The rocker assembly 60 includes an end cover 62 and a rocker portion 64. The end cover 62 is detachably connected to the upper end of the main shaft 20, and the end cover 62 is covered on the upper end of the main body 12; the rocker portion 64 is connected to one side of the end cover 62 and protrudes toward the side of the end cover 62.

[0085] Through the above structure, when the user needs to grind beans, the user can remove the rocker assembly 60 relative to the upper end of the main shaft 20 and place the beans into the installation cavity 1202 through the upper end of the installation cavity 1202. Under the action of gravity, the beans will fall into the grinding cavity through the installation cavity 1202; then the user connects the rocker assembly 60 to the upper end of the main shaft 20 and operates the rocker assembly 60 to drive the main shaft 20 to rotate. The main shaft 20 drives the inner cutter disc 30 to rotate, and the outer blade 34 and the inner blade 142 grind the beans in the grinding cavity 1402.

[0086] In addition, the end cover 62 is disposed at the upper end of the mounting cavity 1202 so that when the bean grinder 100 is grinding beans, the end cover 62 prevents the particles formed after the beans are ground from flying out of the mounting cavity 1202 through the upper end of the mounting cavity 1202, thereby preventing the bean particles from splashing out of the mounting cavity 1202.

[0087] Specifically, the rocker assembly 60 extends toward one side of the body 10, and in a top view, the end of the rocker assembly 60 facing away from the main shaft 20 extends out of the body 10. The end cap 62 is a circular sheet-like structure, and the end of the rocker portion 64 facing away from the end cap 62 is provided with a spherical rotating handle 642 for the user to grasp.

[0088] In some embodiments, the main shaft 20 includes a rotation limiting portion 28, which is located at the upper end of the main shaft 20. The end cover 62 is provided with a plug-in slot 6202, and the rotation limiting portion 28 is plugged into the plug-in slot 6202 so that the end cover 62 and the main shaft 20 can rotate synchronously.

[0089] Through the above structure, when the end cover 62 is connected to the main shaft 20, the rotation limit part 28 is inserted into the insertion groove 6202. When the user rotates the rocker part 64, the rocker part 64 drives the end cover 62 to rotate, so that the end cover 62 drives the main shaft 20 to rotate; therefore, in this embodiment, it is only necessary to insert the rotation limit part 28 into the insertion groove 6202 to complete the connection between the main shaft 20 and the end cover 62, thereby improving the convenience of connecting the main shaft 20 and the end cover 62.

[0090] Specifically, in this embodiment, the rotation limiting portion 28 is a columnar body with a hexagonal end face, and twelve rotation limiting grooves 6204 are provided on the side groove wall of the plug-in groove 6202. Each corner of the rotation limiting portion 28 can be placed in a rotation limiting groove 6204.

[0091] In other embodiments, the rotation limiting portion 28 may also have other structures. For example, when viewed from above, the end face of the rotation limiting portion 28 is D-shaped, and the shape of the insertion slot 6202 is adapted to the rotation limiting portion 28 .

[0092] In some embodiments, the rotation limiting portion 28 is a hexagonal prism structure, and the groove wall of the plug-in groove 6202 is provided with a rotation limiting groove 6204, the number of the rotation limiting grooves 6204 is at least 2 times of 6, and the rotation limiting grooves 6204 are evenly distributed on the groove wall of the plug-in groove 6202 along the circumference of the plug-in groove 6202; each corner of the rotation limiting portion 28 is placed in a rotation limiting groove 6204.

[0093] Through the above structure, when the rotation limit part 28 needs to be inserted into the plug-in slot 6202, it is only necessary to rotate the rotation limit part 28 by a smaller angle so that each corner of the rotation limit part 28 can be aligned with a corresponding rotation limit slot 6204, so that the rotation limit part 28 can be easily inserted into the plug-in slot 6202.

[0094] Specifically, in this embodiment, the number of the rotation limiting slots 6204 is twelve; in other embodiments, the number of the rotation limiting slots 6204 can also be other numbers, such as eighteen.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coffee bean grinder, characterized in that: include: The machine body includes a main body and an outer cutter disc, and the outer cutter disc is mounted on the main body; the outer cutter disc is provided with a grinding chamber; a main shaft rotatably connected to the main body, extending into the grinding chamber, and comprising a first limiting step and a first side limiting surface, wherein the first limiting step faces the lower end of the main shaft; An inner cutter disc, the inner cutter disc being located within the grinding chamber, a mounting through-hole being defined in the middle of the inner cutter disc, the lower end of the spindle being passed through the mounting through-hole, the inner cutter disc including a second side limiting surface located on the wall of the mounting through-hole; the first side limiting surface abutting against the second side limiting surface, enabling the inner cutter disc and the spindle to rotate synchronously; A fixing member, which is detachably connected to the lower end of the main shaft, and the fixing member includes an abutment surface, the first limiting step abuts the upper surface of the inner cutter disc, the abutment surface abuts the lower surface of the inner cutter disc, and the first limiting step and the abutment surface jointly clamp the inner cutter disc.

2. The coffee bean grinder according to claim 1, characterized in that: The machine further comprises an elastic member, the main body defines a mounting cavity, the main body includes a mounting bracket, the upper end of the mounting cavity passes through the upper surface of the main body, the lower end of the mounting cavity is connected to the grinding chamber, the mounting bracket is located in the mounting cavity, the mounting bracket is connected to the cavity wall of the mounting cavity, and the spindle is rotatably connected to the mounting bracket; The mounting frame is provided with an accommodating cavity, and the main shaft is passed through the accommodating cavity from top to bottom. The main shaft includes a second limiting step, and the second limiting step and the elastic member are placed in the accommodating cavity. The lower end of the elastic member abuts against the second limiting step, and the upper end of the elastic member abuts against the top cavity wall of the accommodating cavity; the elastic member is in a compressed state, so that the second limiting step presses against the bottom cavity wall of the accommodating cavity.

3. The coffee bean grinder according to claim 1, characterized in that: The fixing member is a screw, and the fixing member includes a nut. The abutment surface is arranged on a side of the nut facing the inner cutter disc.

4. The coffee bean grinder according to claim 1, wherein: The outer cutter disc is provided with a feed inlet and a discharge outlet. From top to bottom, the feed inlet, the grinding chamber and the discharge outlet are arranged in sequence and adjacent ones are connected to each other. The feed inlet passes through the upper end of the outer cutter disc, and the discharge outlet passes through the lower end of the outer cutter disc. The grinding chamber is in a truncated cone shape, and the area of ​​the discharge port is larger than that of the feed port; the inner cutter disc is in a truncated cone shape, and the area of ​​the lower surface of the inner cutter disc is larger than that of the lower surface of the inner cutter disc; The outer cutter disc is located at the bottom of the main body. When the fixing member is disassembled relative to the main shaft, the inner cutter disc can extend from the outside of the machine body through the discharge port into the bean grinding chamber, or from the inside of the grinding chamber through the discharge port out of the machine body.

5. The coffee bean grinder according to claim 1, characterized in that: At least two positioning blind holes are provided on the lower surface of the inner cutter disc, and all of the positioning blind holes are circumferentially distributed on the rotation axis of the inner cutter disc.

6. The coffee bean grinder according to claim 1, characterized in that: The body further includes an adjusting knob, the adjusting knob being rotatably connected to the outer circumferential side surface of the main body, the rotation axis of the adjusting knob being colinear with the rotation axis of the main shaft; the adjusting knob being sleeved on the outer cutter disc, the inner surface of the adjusting knob being threadedly connected to the outer surface of the outer cutter disc; the main body includes a guide member, the outer cutter disc being provided with a guide groove, the guide member being embedded in the corresponding guide groove; During the rotation of the adjusting knob, the adjusting knob drives the outer cutter disc to move relative to the main body along the direction of the rotation axis of the adjusting knob, and the guide member moves in the guide groove.

7. The coffee bean grinder according to claim 6, characterized in that: The outer cutter disc includes at least two side protrusion blocks, which protrude from the outer surface of the outer cutter disc; the inner surface of the adjusting knob is threadedly connected to the side of the side protrusion block that is away from the central axis of the outer cutter disc; all the side protrusion blocks are circumferentially distributed on the outer cutter disc, and the guide groove is formed between two adjacent side protrusion blocks.

8. The coffee bean grinder according to claim 1, wherein: Also included is a rocker assembly, wherein the rocker assembly is detachably connected to the upper end of the main shaft; The rocker assembly includes an end cover and a rocker portion. The end cover is detachably connected to the upper end of the main shaft, and the end cover is arranged on the upper end of the main body; the rocker portion is connected to one side of the end cover and protrudes toward the side of the end cover.

9. The coffee bean grinder according to claim 8, characterized in that: The main shaft includes a rotation limiting portion, which is located at the upper end of the main shaft. The end cover is provided with an inserting slot, and the rotation limiting portion is inserted into the inserting slot so that the end cover and the main shaft can rotate synchronously.

10. The coffee bean grinder according to claim 9, characterized in that: The rotation limiting portion is a hexagonal prism structure, and the groove wall of the plug-in slot is provided with a rotation limiting groove. The number of the rotation limiting grooves is at least 2 times of 6, and the rotation limiting grooves are evenly distributed on the groove wall of the plug-in slot along the circumference of the plug-in slot; each corner of the rotation limiting portion is placed in a corresponding rotation limiting groove.

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