Grinding device

Abstract

The invention provides a grinding device. The grinding device comprises a main machine body; the hopper is detachably connected to the main machine body; the grinding assembly is arranged on the main machine body and comprises a first grinding element and a second grinding element, a grinding gap is formed between the two grinding elements, the first grinding element is driven to move relative to the main machine body so as to adjust the grinding gap, and the second grinding element is driven to rotate relative to the first grinding element; the hopper comprises a material box and a material door connected to the material box, a discharge port is formed in the bottom of the material box, and the material door can selectively rotate relative to the material box to open and close the discharge port; the rotary sleeve is arranged in the main machine body, the material box operably drives the rotary sleeve to rotate from a first interval to a second interval, in the first interval, the material door is fixed relative to the main machine body, and the material box rotates to enable the material door to open the discharge port; and in the second section, the first grinding element is linked with the rotating sleeve, the rotating sleeve is in transmission connection with the material door, and the material box drives the rotating sleeve and the material door to rotate synchronously.

Description

Technical Field

[0001] The present invention relates to equipment for pulverizing or grinding foods, ingredients, etc., and particularly relates to a grinding device. Background Art

[0002] Grinding devices for household or professional use are known, which can be used to grind or crush different types of foods such as grains, seeds, coffee beans or dried fruits such as walnuts, almonds, hazelnuts, etc. to obtain powders with a certain particle size, or to chop vegetables such as carrots.

[0003] The grinding device can be integrated into other household appliances, such as a machine for preparing beverages, or they can be used as independent components and accessories. Generally, whether integrated into household appliances or "set separately", the grinding tool in the grinding device is integrated inside the body, and a hopper is provided to feed the items to be ground. For example, coffee beans can be loaded into the hopper to enter the inside of the body.

[0004] In order to facilitate the cleaning and maintenance of the hopper, it is necessary to provide a removable hopper. Before or after installing the hopper, the fineness adjustment of the coffee powder is achieved by rotating the exposed knob on the grinding device. The knob converts the rotation of the knob into the rotation of a rotating sleeve through a transmission mechanism such as a gear set. The rotating sleeve drives the first grinding member of the grinding device to change its position, adjusting the gap between the first grinding member and the second grinding member to achieve the fineness adjustment of the coffee powder.

[0005] Before disassembling the hopper of the grinding device, the discharge port of the hopper needs to be closed to prevent the leakage of coffee beans during and after the disassembly process. After the hopper is installed on the grinding device, the discharge port needs to be opened to facilitate the smooth grinding of the coffee beans.

[0006] However, the installation of the hopper and the adjustment of the grinding gear need to be carried out separately, with complex operations and poor user experience. When the user performs the coffee bean grinding operation, different operations need to be performed in two different places to respectively achieve the functions of hopper opening and gear adjustment. Summary of the Invention

[0007] The purpose of the present invention is to provide a grinding device with convenient operation and simple structure.

[0008] To achieve one of the above-mentioned invention purposes, the present invention provides a grinding device, including:

[0009] A main body;

[0010] A hopper detachably connected to the main body;

[0011] A grinding assembly is provided on the main body. The grinding assembly includes a first grinding element and a second grinding element. A grinding gap is formed between the first grinding element and the second grinding element. The first grinding element is driven to move relative to the main body to adjust the grinding gap. The second grinding element is driven to rotate relative to the first grinding element to grind the raw material to be ground in the grinding gap.

[0012] The hopper includes a material box and a material door connected to the material box. An outlet is provided at the bottom of the material box. The material door can selectively rotate relative to the material box to open and close the outlet. The grinding device further includes a rotating sleeve provided in the main body. The rotating sleeve is provided between the hopper and the first grinding element. The material box is fixedly connected to the rotating sleeve in the circumferential direction. The material box can operably drive the rotating sleeve to rotate from a first interval to a second interval. In the first interval, the material door is fixed relative to the main body. The material box drives the rotating sleeve to rotate relative to the main body to open the outlet by the material door. In the second interval, the first grinding element is linked with the rotating sleeve. The rotating sleeve establishes a transmission connection with the material door. The material box drives the rotating sleeve and the material door to rotate synchronously to adjust the grinding gap.

[0013] As a further improvement of an embodiment of the present invention, in the second interval, along the direction from the second interval to the first interval, the material box drives the material door to reset synchronously through the transmission connection.

[0014] As a further improvement of an embodiment of the present invention, a door positioning structure is provided between the material door and the material box. The door positioning structure includes a positioning groove and a positioning element cooperating with the positioning groove. An installation groove is provided at the bottom of the material box. The positioning groove is provided on the end face of the material door facing the material box. The positioning element is partially accommodated in the installation groove and snaps into the positioning groove under the action of elastic force.

[0015] As a further improvement of an embodiment of the present invention, a plurality of baffles are circumferentially and spacedly arranged at the bottom of the material box. An outlet is formed between adjacent baffles. A connecting column is provided at the center of the bottom of the material box. Each baffle is connected between the connecting column and the inner wall of the material box. And each baffle is configured to be inclined towards both sides and the bottom of the material box relative to the radial center line of the baffle. The installation groove is provided at the connection between one of the baffles and the connecting column.

[0016] As a further improvement of an embodiment of the present invention, a door locking structure is provided between the main body and the material door. The door locking structure includes a first limit pin provided on the main body and a limit groove provided on the material door. In the first interval, the first limit pin snaps into the limit groove to limit the rotation of the material door with the material box.

[0017] As a further improvement of one embodiment of the present invention, the material door locking structure also includes a second limit pin fixed relative to the first limit pin, and a guide groove extending in the circumferential direction is provided on the rotating sleeve; in the first interval, the first limit pin is inserted into the limit groove, and the second limit pin is located in the guide groove, and the first limit pin is restricted from moving in a direction radially outward away from the limit groove; in the second interval, the second limit pin is located outside the guide groove, and the first limit pin is allowed to move in a direction radially outward away from the limit groove.

[0018] As a further improvement of one embodiment of the present invention, an installation box is connected to the main body, the first limit pin includes a support section away from the limit groove, the support section extends into the installation box, the first limit pin is connected to an elastic member, and the elastic member is sleeved on the support section in the installation box.

[0019] As a further improvement of one embodiment of the present invention, the rotating sleeve is provided with an edge extending in the circumferential direction, and the edge and the guide groove are arranged at intervals along the circumference of the rotating sleeve. In the second interval, the second limit pin abuts against the edge and is guided to move in the radial outward direction.

[0020] As a further improvement of one embodiment of the present invention, a positioning protrusion is arranged on the periphery of the material box, a clearance groove for the positioning protrusion to pass through is arranged on the main body, a convex plate extending upward from the bottom is arranged on the periphery of the material door, the position and shape of the convex plate match the positioning protrusion, the limiting groove is arranged on the convex plate, and the convex plate passes through the clearance groove and cooperates with the first limiting pin.

[0021] As a further improvement of one embodiment of the present invention, a positioning protrusion is arranged on the outer periphery of the material box, a clearance groove and a first blocking portion are arranged on the main body at intervals along the circumference of the rotating sleeve, and a second blocking portion is also provided on the main body. The second blocking portion is arranged between the clearance groove and the first blocking portion and extends along the circumference of the rotating sleeve. The positioning protrusion passes through the clearance groove axially to rotate relative to the main body, the first blocking portion limits the terminal position of the positioning protrusion relative to the main body, and the second blocking portion limits the positioning protrusion from being separated from the main body along the axial direction.

[0022] As a further improvement of one embodiment of the present invention, a material door driving structure is arranged between the rotating sleeve and the material door, and the material door driving structure includes a material door driving component arranged on the rotating sleeve, and a locking groove is provided on the material door. In the first interval, the material door driving component and the locking groove are staggered in the circumferential direction; in the second interval, the material door driving component is stuck in the locking groove.

[0023] As a further improvement of one embodiment of the present invention, the rotating sleeve includes an end face recess, the hopper is installed on the main body corresponding to the end face recess, the locking groove is arranged on the end face of the material door facing away from the material box, and the material door driving member extends upward from the bottom of the end face recess under the action of elastic force to be inserted into the locking groove.

[0024] As a further improvement of one embodiment of the present invention, the material door driving component is provided with a ramp surface along one side of the circumference of the rotating sleeve; when rotating from the second interval to the first interval, the locking groove passes over the ramp surface to separate the material door driving component from the material door.

[0025] As a further improvement of one embodiment of the present invention, a radially protruding convex edge is provided on the peripheral wall of the rotating sleeve, a micro switch is provided on the main body, and the rotating sleeve has a first stroke and a second stroke along the direction from the first interval to the second interval. In the first stroke, the convex edge and the micro switch are staggered in circumferential position; in the second stroke, the convex edge triggers the micro switch.

[0026] As a further improvement of one embodiment of the present invention, a material door locking structure is arranged between the main body and the material door, and the material door locking structure includes a groove arranged on the main body and a limiting protrusion arranged on the material door. In the first interval, the limiting protrusion is inserted into the groove to limit the material door from rotating with the material box.

[0027] As a further improvement of one embodiment of the present invention, a positioning protrusion is arranged on the periphery of the material box, a clearance groove for the positioning protrusion to pass through is arranged on the main body, a convex plate extending upward from the bottom is arranged on the periphery of the material door, the position and shape of the convex plate match the positioning protrusion, the limiting protrusion is arranged on the outer side of the convex plate, and the groove is arranged in the clearance groove.

[0028] Compared with the prior art, the beneficial effect of the present invention is that the material box can be rotated to open the material outlet and adjust the gear of the bean grind coarseness. The material outlet opening and gear adjustment functions are integrated into one. The user only needs to rotate the material box to realize the two functions. The operation is simple and convenient, the experience is better, and the grinding device can be made more concise and beautiful. In addition, the hopper is composed of only the material box and the material door. The structure of the hopper is simple, which is convenient to disassemble from the main body, and cleaning and maintenance are also very simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a perspective schematic diagram of a grinding device according to one embodiment of the present invention.

[0030] Figure 2 yes Figure 1Schematic exploded perspective view of the grinding device in

[0031] Figure 3 is Figure 1 Schematic cross-sectional view of the grinding device in along line A-A.

[0032] Figure 4 is Figure 1 Schematic perspective view of the hopper of the grinding device in

[0033] Figure 5 is Figure 1 Schematic perspective view of the main body part of the grinding device in

[0034] Figure 6 is Figure 1 Schematic perspective view of the main body part of the grinding device in from another perspective

[0035] Figure 7 is Figure 1 Schematic exploded perspective view of some components of the main body of the grinding device in

[0036] Figure 8 is Figure 1 Top view of the grinding device in

[0037] Figure 9 is Figure 1 Schematic perspective view of the main body part of the grinding device in in the initial state

[0038] Figure 10 is Figure 1 Schematic perspective view of the main body part of the grinding device in at the end of the first interval

[0039] Figure 11 is Figure 10 Schematic cross-sectional view of the main body part of the grinding device in at the end of the first interval

[0040] Figure 12 is Figure 10 Schematic cross-sectional view of the grinding device in along line B-B

[0041] Figure 13 is Figure 1 Schematic perspective view of the main body part of the grinding device in in the second interval

[0042] Figure 14 is Figure 13 Schematic cross-sectional view of the main body part of the grinding device in in the second interval

[0043] Figure 15 Schematic exploded perspective view of the grinding device according to another embodiment of the present invention. Detailed implementation mode

[0044] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present invention.

[0045] It should be understood that the terms indicating relative spatial positions such as "upper", "above", "lower", "below", etc. used herein are for the purpose of facilitating description of the relationship between one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms of relative spatial positions may be intended to include different orientations of the device in use or operation other than the orientations shown in the figures.

[0046] Taking the grinding device for grinding coffee beans as an example, the specific embodiments of the present invention will be described. Refer to Figures 1 to 4 As shown, in the first preferred embodiment, the grinding device 100 includes a main body 10, and a hopper 20 is detachably connected to the main body 10. The hopper 20 is used to hold coffee beans. The detachable hopper 20 is provided to facilitate the cleaning and maintenance of the hopper 20. The main body 10 can be the main body of a grinding device for independent use; or the grinding device is a part of a beverage machine, and the main body 10 is the main body of the beverage machine.

[0047] The main body 10 is provided with a grinding assembly. The grinding assembly includes a first grinding element 31 and a second grinding element 32. The two grinding elements are preferably coaxially arranged in the main body 10. Among them, a grinding gap is formed between the first grinding element 31 and the second grinding element 32. The first grinding element 31 is driven to move relative to the main body 10 to adjust the grinding gap, and the second grinding element 32 rotates relative to the first grinding element 31 to grind the coffee beans to be ground in the grinding gap. The second grinding element 32 can be driven to rotate by a bean grinding motor 11 to complete the grinding of coffee beans. In addition, the first grinding element 31 is circumferentially fixed relative to the main body 10, and its axial position can be adjusted by a gear shift ring 33, so that the fineness of the ground coffee powder can be selected. When the first grinding element 31 rises, the grinding gap becomes larger, making the ground coffee powder coarser; when the first grinding element 31 descends, the grinding gap becomes smaller, making the particles of the ground coffee powder smaller.

[0048] Further, the hopper 20 includes a cartridge 21 and a door 22 connected to the cartridge 21. An outlet 211 is provided at the bottom of the cartridge 21. The door 22 can selectively rotate relative to the cartridge 21 to open and close the outlet 211. In this embodiment, it is preferably provided with three outlets 211, and the three outlets 211 are evenly distributed along the circumferential direction. Three baffles 212 are provided at the bottom of the cartridge 21, and an outlet 211 is formed between two adjacent baffles 212. Three openings 221 corresponding to the outlets 211 can be provided on the door 22. When the openings 221 overlap with the outlets 211, the outlets 211 are opened, and when the openings 221 are circumferentially staggered from the outlets 211, the outlets 211 are closed. The cartridge 21 and the door 22 are connected by fixing members such as screws or pins, and the fixing members are used to axially fix between the cartridge 21 and the door 22, and the cartridge 21 and the door 22 can rotate relative to each other.

[0049] The grinding device 100 further includes a rotating sleeve 40 provided in the main body 10. The rotating sleeve 40 is provided between the hopper 20 and the first grinding element 31. The cartridge 21 and the rotating sleeve 40 are fixed along the circumferential direction. The cartridge 21 and the rotating sleeve 40 can be directly fixed, or can be indirectly fixed through other structures or components. Among them, the cartridge 21 can operably drive the rotating sleeve 40 to rotate from the first interval to the second interval. In the first interval, the door 22 is fixed relative to the main body 10, and the cartridge 21 drives the rotating sleeve 40 to rotate relative to the main body 10 to open the outlet 211 of the door 22; in the second interval, the first grinding element 31 is linked with the rotating sleeve 40, the rotating sleeve 40 is in transmission connection with the door 22, and the cartridge 21 drives the rotating sleeve 40 and the door 22 to rotate synchronously to adjust the grinding gap.

[0050] By rotating the cartridge 21, the outlet 211 can be opened, and the grinding fineness can also be adjusted. The opening of the outlet 211 and the gear adjustment function are integrated into one. The user only needs one rotation operation of the cartridge 21 to realize the two functions respectively. The operation is simple and convenient, and the experience is better. At the same time, the appearance of the grinding device can be made more concise and beautiful. In addition, except for the necessary fixing members, the hopper 20 is only composed of the cartridge 21 and the door 22. The structure of the hopper 20 is simple, convenient to disassemble from the main body 10, and very simple and convenient to clean and maintain.

[0051] In this embodiment, the rotating sleeve 40 is indirectly connected to the first grinding element 31 through the gear adjustment ring 33 to realize the linkage between the two. In other feasible solutions, the rotating sleeve 40 can also be directly connected to the first grinding element 31 for linkage.

[0052] Wherein, the direction from the first interval to the second interval is defined as the locking direction or the forward direction, and the direction from the second interval to the first interval is defined as the unlocking direction or the reverse direction. In the second interval, along the direction from the second interval to the first interval, the transmission connection established between the cartridge 21 and the door 22 through the rotating sleeve 40 drives the door 22 to reset synchronously. That is to say, in the second interval, both the forward rotation and the reverse rotation of the door 22 are driven by the rotating sleeve 40, and the linkage of the cartridge 21, the door 22 and the rotating sleeve 40 is realized through fewer parts and a simple structure, which is convenient for the assembly of the main body 10 of the machine and has a lower cost, and ensures that the door 22 is always in the state of opening the discharge port 211 in the second interval.

[0053] Further, a door positioning structure 25 is provided between the door 22 and the cartridge 21. The door positioning structure 25 includes a positioning groove 251 and a positioning element 252 that cooperates with the positioning groove 251. An installation groove 214 is provided at the bottom of the cartridge 21. The positioning groove 251 is provided on the end face of the door 22 facing the cartridge 21. The positioning element 252 is partially accommodated in the installation groove 214 and snaps into the positioning groove 251 under the action of an elastic force. Through the cooperation of the positioning element 252 and the positioning groove 251 between the cartridge 21 and the door 22, the rotation of the door 22 relative to the cartridge 21 is restricted, so that the hopper 20 is constructed as a whole, preventing the user from accidentally touching and causing the door 22 to open, thereby ensuring that the coffee beans inside do not fall or leak when the hopper 20 is removed. The cartridge 21 and the door 22 can be connected by screws, and no threads are provided on the door 22, which does not affect the relative rotation between the cartridge 21 and the door 22. Of course, the cartridge 21 and the door 22 can also be connected by pins to fix the axial positions of the cartridge 21 and the door 22 and allow the cartridge 21 and the door 22 to rotate relative to each other, and then the relative rotation of the door 22 and the cartridge 21 is further limited by the door positioning structure 25.

[0054] A plurality of baffles 212 are circumferentially and spacedly arranged at the bottom of the cartridge 21. An outlet 211 is formed between adjacent baffles 212. A connecting column 213 is provided at the center of the bottom of the cartridge 21. Each baffle 212 is connected between the connecting column 213 and the inner wall of the cartridge 21, and each baffle 212 is configured to be inclined towards both sides with respect to the radial center line of the baffle 212 and the bottom of the cartridge 21. The installation groove 214 is provided at the connection between one of the baffles 212 and the connecting column 213. Arranging the installation groove 214 at the connection between the baffle 212 and the connecting column 213 does not affect the structural strength of the cartridge 21, and the cooperation between the positioning groove 251 and the positioning element 252 is more reliable. In addition, the elastic force borne by the positioning element 252 can be provided by a first elastic member 253. The first elastic member 253 can be a compression spring, and the compression spring can also be installed in the installation groove 214 to ensure the reliability of the entire positioning structure 25.

[0055] The provision of the connecting post 213 facilitates the connection with the material door 22 and ensures the coaxiality of the connection between the material box 21 and the material door 22. An installation post 223 protruding upward is provided at the center of the material door 22, and the installation post 223 extends into the connecting post 213. The top of the connecting post 213 has a downwardly protruding neck 216, and the installation post 223 is supported on the neck 216. Screws pass through the neck 216 to fix the material box 21 and the material door 22 circumferentially. The provision of the neck 216 can further ensure the coaxiality of the connection between the material box 21 and the material door 22 and also provide support for the rotation of the material door 22. The screws are inserted into the interior of the installation post 223 to achieve the connection between the material door 22 and the material box 21, and can also prevent the screws from loosening due to accidental contact.

[0056] Further referring to Figures 5 to 7 a material door locking structure 45 is provided between the main body 10 and the material door 22. The material door locking structure 45 includes a first limit pin 451 provided on the main body 10 and a limit groove 226 provided on the material door 22. In the first interval, the first limit pin 451 is engaged in the limit groove 226 to restrict the rotation of the material door 22 along with the material box 21. The material door 22 is locked relative to the main body 10, and when the material box 21 rotates, it can overcome the elastic force exerted by the first elastic member 253 on the positioning element 252, so that the positioning element 252 leaves the positioning groove 251 to allow relative rotation between the material door 22 and the material box 21. Through the cooperation of the first limit pin 451 and the limit groove 226, when the hopper 20 is installed on the main body 10, the discharge port 211 can be opened by rotating the material box 21, and the material door 22 is locked by the main body 10 and will not rotate with the material box 21, thus ensuring that the discharge port 211 can be opened smoothly.

[0057] The first limit pin 451 is connected to a second elastic member 452, and the second elastic member 452 exerts an elastic force on the first limit pin 451 towards the limit groove 226. When the material box 21 rotates relative to the material door 22, when the force that the material box 21 needs to overcome for the positioning element 252 to disengage from the positioning groove 251 is less than the force for the first limit pin 451 to disengage from the limit groove 226, the material box 21 can rotate smoothly relative to the material door 22 while the material door 22 can remain relatively fixed to the main body 10.

[0058] Preferably, in this embodiment, the material door locking structure 45 further includes a second limit pin 453 fixed relative to the first limit pin 451. A guiding groove 413 extending circumferentially is provided on the rotating sleeve 40. In the first interval, the first limit pin 451 is snapped into the limit groove 226, the second limit pin 453 is located within the guiding groove 413, and the first limit pin 451 is restricted from moving in the direction of radially outwardly leaving the limit groove 226. In the second interval, the second limit pin 453 is located outside the guiding groove 413, and the first limit pin 451 is allowed to move in the direction of radially outwardly leaving the limit groove 226. By restricting the second limit pin 453 through the guiding groove 413, during the process of the material box 21 opening the discharge port 211, the first limit pin 451 cannot be separated from the limit groove 226, thereby ensuring that the material door 22 is reliably held in a position relatively fixed to the main body 10 of the machine, and the discharge port 211 can be smoothly opened. In this way, it is not necessary to define the relationship between the elastic force of the second elastic member 452 and the first elastic member 253. During the process of the material box 211 rotating to open the discharge port 211, the material door 22 will not rotate following the material box 21.

[0059] The extending direction of the first limit pin 451 and the extending direction of the second limit pin 453 are arranged at an angle, preferably 90 degrees. The first limit pin 451 can be integrally provided with the second limit pin 453 or connected separately, which is convenient for manufacturing and cooperating with the material door 22 and the rotating sleeve 40. Further, an installation box 14 is connected to the main body 10 of the machine. The first limit pin 451 includes a support section 454 away from the limit groove 226, and the support section 454 extends into the installation box 14. The second elastic member 452 is sleeved on the support section 454 within the installation box 14. The installation box 14 is provided to accommodate the second elastic member 452 and the first limit pin 451 to ensure the reliability of the structure.

[0060] The rotating sleeve 40 is further provided with a circumferentially extending edge 415, and the edge 415 is spaced from the guiding groove 413. In the second interval, the second limit pin 453 abuts against the edge 415 and is guided to move in the radially outward direction. The provision of the edge 415 can ensure that the first limit pin 451 can be separated from the limit groove 226, ensuring the reliability of the structure. Moreover, within the second interval, the second limit pin 453 remains in contact with the edge 415, so that the rotation of the material door 22 is not affected, and the structure is more reliable. At the same time, by rotating the rotating sleeve 40, the edge 415 abuts against the second limit pin 453 and drives the second limit pin 453 to move outward, so that the first limit pin 451 can be separated from the limit groove 226, which can avoid the separation of the first limit pin 451 and the limit groove 226 in the form of overcoming the interference force, reducing the risk of damage to the first limit pin 451 and the limit groove 226.

[0061] In addition, positioning protrusions 215 are provided on the outer periphery of the material box 21. Two positioning protrusions 215 can be provided. Two relief grooves 112 corresponding to the two positioning protrusions 215 are provided on the main body 10. A convex plate 225 extending upward from the bottom is provided on the outer periphery of the material door 22. The position and shape of the convex plate 225 match those of one of the positioning protrusions 215. A limit groove 226 is provided on the convex plate 225. The convex plate 225 passes through the relief groove 112 and cooperates with the first limit pin 451. A groove 42 is provided on the rotating sleeve 40 for cooperating with the other positioning protrusion 215 to achieve circumferential fixation of the material box 21 and the rotating sleeve 40. By providing the limit groove 226 on the convex plate 225, when the hopper 20 is installed on the main body 10, the locking of the material door 22 relative to the main body 10 can be achieved. The position of the limit groove 226 corresponds to that of the positioning protrusion 215, which is convenient for the alignment of the hopper 20 with the main body 10 during installation. Herein, the fact that the position and shape of the convex plate 225 match those of the positioning protrusion 215 means that the position of the convex plate 225 corresponds to that of the positioning protrusion 215 along the circumferential direction of the material box 21, and the two side edges of the convex plate 225 along the circumferential direction of the material box 21 do not exceed the two side edges of the positioning protrusion 215 along the circumferential direction of the material box 21, so as to ensure that the convex plate 225 can pass through the relief groove 112.

[0062] In addition, a first blocking portion 114 spaced from the relief groove 112 along the circumferential direction of the rotating sleeve 40 is provided on the main body. A second blocking portion 116 is further provided on the main body 10. The second blocking portion 116 is provided between the relief groove 112 and the first blocking portion 114 and extends along the circumferential direction of the rotating sleeve 40. The positioning protrusion 215 axially passes through the relief groove 112 to rotate relative to the main body 10. The first blocking portion 114 defines the terminal position of the positioning protrusion 215 rotating relative to the main body 10, and the second blocking portion 116 limits the axial separation of the positioning protrusion 215 from the main body 10. The provision of the first blocking portion 114 can be used to prevent the material box 21 from rotating excessively. The first blocking portion 114 can extend into the inner side of the rotating sleeve 40 to limit the circumferential movement of the rotating sleeve 40. The provision of the second blocking portion 116 can limit the axial separation of the material box 21 from the main body 10.

[0063] Refer to Figure 2 , Figure 3 and Figure 6 , a material door driving structure 46 is provided between the rotating sleeve 40 and the material door 22. The material door driving structure 46 includes a material door driving member 461 and a locking groove 227 (such as Figure 11) The material gate driving member 461 is disposed on the rotating sleeve 40, and the locking groove 227 is provided on the material gate 22. In the first interval, the circumferential positions of the material gate driving member 461 and the locking groove 227 are offset; in the second interval, the material gate driving member 461 snaps into the locking groove 227. That is to say, the transmission connection between the rotating sleeve 40 and the material gate 22 is established through the cooperation of the material gate driving member 461 and the locking groove 227. In the second interval, the position of the material gate 22 is locked relative to the rotating sleeve 40. The material box 21 drives the rotating sleeve 40 to rotate, and the rotating sleeve 40 drives the material gate 22 to rotate, so that the material gate 22 rotates together with the material box 21 to ensure that the discharge port 211 can remain in the open state.

[0064] Among them, the rotating sleeve 40 includes an end face recess 412. The hopper 22 is installed on the main body 10 corresponding to the end face recess 412. The locking groove 227 is provided on the end face of the material gate 22 facing away from the material box 21. The material gate driving member 461 is elastically biased to protrude upward from the bottom of the end face recess 412 to snap into the locking groove 227. The material gate driving member 461 is disposed in the end face recess 412 of the rotating sleeve 40. When installing the hopper 20, the action of loading it downward into the end face recess 412 can press down the material gate driving member 461. When the material box 21 rotates to the second interval, the material gate driving member 461 snaps into the locking groove 227 under the action of the elastic force. The structure is simple and reliable, and the installation of the hopper 20 is convenient and labor-saving.

[0065] The end face recess 412 of the rotating sleeve 40 is provided with an axially penetrating opening groove 416. A support member 462 is connected to the edge of the rotating sleeve 40. The material gate driving member 461 is configured as an L shape. One end thereof protrudes from the opening groove 416, and the other end is limited between the rotating sleeve 40 and the support member 462. A third elastic member 463 is disposed between the support member 462 and the material gate driving member 461. One end of the rotating sleeve 40 away from the material gate 22 is provided with a receiving cavity 465. The receiving cavity 465 is formed by a part of the peripheral wall of the rotating sleeve 40 and a rib plate surrounding the periphery of this part of the peripheral wall. The receiving cavity 465 has a bottom opening. A part of the material gate driving member 461 and the third elastic member 463 are accommodated in the receiving cavity 465. The support member 463 is connected to the rotating sleeve 40 through a fastener and the support member 463 can also close the bottom opening of the receiving cavity 465. Except for the part of the material gate driving member 461 protruding from the opening groove 416, the rest of the material gate driving member 461 and the third elastic member 463 are not exposed. The material gate driving structure 46 and the rotating sleeve 40 form an integral body, which is convenient for the installation of the rotating sleeve 40 on the main body 10 of the machine.

[0066] In the above embodiments, the transmission connection is established by the structure in which the end face of the rotating sleeve 40 opposite to the feed door 22 is connected at a preset position. Of course, the transmission connection between the rotating sleeve 40 and the feed door 22 can also be a structure in which the circumferential surface of the rotating sleeve 40 opposite to the feed door 22 is connected at a preset position, or a way in which the rotating sleeve 40 and the feed door 22 are connected by a shaft and a shaft sleeve and the transmission connection is only realized at a preset position. In the present invention, the specific structure of the transmission connection is not limited, as long as the rotating sleeve 40 can drive the feed door 22 to rotate.

[0067] In addition, with reference to Figure 6 and Figure 12 , in order to facilitate the separation of the feed door driving member 461 from the locking groove 227 when the hopper 22 is unlocked, one side of the feed door driving member 461 exposed from the opening groove 416 is configured as a slope surface 466, and the slope surface 466 corresponds to the unlocking direction of the hopper 22, that is, along the direction from the second interval to the first interval. When the hopper 20 rotates from the second interval to the first interval, the slope surface 466 crosses the locking groove 227 so that the feed door driving member 461 is separated from the feed door 22. When the hopper 20 is unlocked, under the guidance of the slope surface 466, the locking groove 227 and the feed door driving member 461 are more easily separated, and the user operation will be more labor-saving. Further, a radially protruding flange 47 is provided on the peripheral wall of the rotating sleeve 40, and a microswitch 17 is provided on the main body 10 of the machine. Along the direction from the first interval to the second interval, the rotating sleeve 40 has a first stroke and a second stroke. In the first stroke, the flange 47 and the microswitch 17 are circumferentially offset; in the second stroke, the flange 47 triggers the microswitch 17. The microswitch 17 is used to detect whether the hopper 20 is in place. When the microswitch 17 is closed, the control system of the grinding device 100 detects an electrical signal, determines that the hopper 20 is in place, and at the same time, the grinding motor 11 is powered on and enters the standby state. Moreover, only when the hopper 20 is installed on the main body 10 of the machine and rotates past the first stroke, the microswitch 17 will be triggered and closed, and the control system issues a grinding command according to the closing of the microswitch 17, and then the grinding can start, reducing the safety hazard. The triggering of the microswitch 17 can start from the second stroke corresponding to the first interval, and the microswitch 17 is kept in the triggered state in the second interval, or the triggering of the microswitch 17 can start from the second interval. In the second stroke of the rotating sleeve 40, the flange 47 triggers the microswitch 17, that is, before the feed door 22 is completely opened, the flange 47 has contacted the microswitch 17. Taking the rotation of the cartridge 21 by 60° as an example, when the flange 47 starts to contact the microswitch 17 from 55° to 60°. In this way, receiving the signal and then giving the command is more accurate. If the microswitch 17 is triggered after the feed door 22 is completely opened, signal lag may occur and the command cannot be given in time.

[0068] Next, in conjunction with Figures 8 to 14Specifically describe the process of installing the hopper 20 onto the main body 10 and adjusting the gears. Locking and unlocking indicators are provided on the hopper 20, and the locking and unlocking indicators are located on the outer surface of the hopper 21 for the convenience of users to identify. Taking Figure 8 The initial state of the grinding device is shown. The hopper 21 rotates to one side in the position indicated by arrow A for locking.

[0069] As Figure 2 、 Figure 8 and Figure 9 shown, in the initial state, the positioning protrusion 215 on the hopper 20 is correspondingly downwardly inserted into the main body 10 with the position of the relief groove 112 on the main body 10. When the hopper 20 is in the initial position, the three baffles 212 of the hopper 21 overlap with the three openings 221 of the feed door 22 (or the three discharge ports 211 of the hopper 21 are staggered from the three openings 221 of the feed door 22), and at this time, the coffee beans in the hopper 21 cannot fall. In this embodiment, the opening angle of each discharge port 211 is set to 60°. The first limit pin 451 on the main body 10 is inserted into the limit groove 226 on the feed door 22, the second limit pin 453 is limited by the guide groove 413 on the rotating sleeve 40, and the second elastic member 452 is in an elastic release state. The feed door driving member 161 is in a pressing state staggered from the locking groove 227 on the feed door 22. The micro switch 17 is in an open state, and the open state means that the circuit is not connected. At this time, even if a grinding instruction is sent to the grinding motor 11 through the grinding device 100, the grinding motor 11 will not work.

[0070] As Figure 2 、 Figures 10 to 12 shown, in the first interval, the hopper 20 rotates α degrees in the direction of the locking indicator. During this process, the hopper 21 and the rotating sleeve 40 rotate together through the cooperation of the positioning protrusion 215 and the groove 42 on the rotating sleeve 40, while the feed door 22 is cooperated with the first limit pin 451 on the main body 10 through the limit groove 226, and the cooperation between the guide groove 413 on the rotating sleeve 40 and the second limit pin 453 further stops the first limit pin 451 from exiting outward and separating from the limit groove 226, so that the feed door 22 is limited and fixed relative to the main body 10. At this time, the hopper 21 drives the rotating sleeve 40 to rotate, while the feed door 22 remains stationary, so that the discharge port 211 is opened. The feed door driving member 461 is still in a pressing state staggered from the locking groove 227 on the feed door 22, and the feed door driving member 461 rotates together with the rotating sleeve 40 and the hopper 21.

[0071] As Figure 2 、 Figure 13 and Figure 14As shown in the figure, in the second interval, in the state of adjusting the grinding gear, the material box 21 continues to rotate γ degrees towards the locking mark direction. During this process, the material box 21, the material door 22, and the rotating sleeve 40 are linked as a whole. As the material box 21 rotates, the rotating sleeve 40 drives the gear adjustment ring 33 to rotate, thereby completing the gear adjustment. The gear adjustment ring 33 drives the first grinding element 31 to move up and down through a threaded connection, and adjusts the grinding gap between the first grinding element 31 and the second grinding element 32 to achieve the adjustment of the grinding fineness gear. The second limit pin 453 is limited by the edge 415 of the rotating sleeve 40, the second elastic member 452 is in an elastic energy storage state, and the microswitch 17 is in a closed state.

[0072] The process of removing the material box 21 is opposite to the process of installation and adjustment. Among them, when the material box 21 is reversely unlocked and rotated until the limit groove 226 of the material door 22 cooperates with the first limit pin 451, at this time, the guide groove 413 on the rotating sleeve 40 stops the second limit pin 453 from exiting outward, so that the material door 22 is limited. And the slope surface 466 on the material door driving member 461 on the rotating sleeve 40 forms a guiding portion. When the material box 21 rotates further, the locking groove 227 on the material door 22 is separated from the material door driving member 461, so that the material door 22 can be automatically disengaged from the transmission connection with the rotating sleeve 40.

[0073] Refer to Figure 15 As shown in the figure, it is the preferred second embodiment of the grinding device of the present invention. In this embodiment, the components with the same reference numerals as those in the first embodiment have the same structure and function as those in the first embodiment, and will not be described in detail here. The difference is that a material door locking structure is provided between the main body of the machine and the material door. The material door locking structure includes a positioning groove 118 provided on the main body of the machine and a limit protrusion 228 provided on the material door 22. In the first interval, the limit protrusion 228 is snapped into the positioning groove 118 to limit the rotation of the material door 22 along with the material box 21. Through the cooperation of the limit protrusion 228 and the positioning groove 118, when the hopper 20 is installed on the main body 10 of the machine, the discharge port 211 can be opened by rotating the material box 21, and the material door 22 is locked by the main body 10 of the machine and will not rotate along with the material box 21, so as to ensure that the discharge port 211 can be opened smoothly.

[0074] A positioning projection 215 is provided on the outer periphery of the material box 21, a relief groove 112a for the positioning projection 215 to pass through is provided on the main body 10 of the machine, a convex plate 225 extending upward from the bottom is provided on the outer periphery of the material door 22, the position and shape of the convex plate 225 match those of the positioning projection 215, a limit projection 228 is provided on the outer side of the convex plate 225, and a positioning groove 118 is provided in the relief groove 112a. By providing the limit projection 228 on the convex plate 225, when the hopper 20 is installed on the main body 10 of the machine, the locking of the material door 22 relative to the main body 10 of the machine can be achieved. The position of the limit projection 228 corresponds to that of the positioning projection 215, which is convenient for the alignment of the hopper 20 and the main body 10 of the machine during installation. Among them, the fact that the position and shape of the convex plate 225 match those of the positioning projection 215 is defined as that the position of the convex plate 225 corresponds to that of the positioning projection 215 along the circumferential direction of the material box 21, and the two side edges of the convex plate 225 along the circumferential direction of the material box 21 do not exceed the two side edges of the positioning projection 215 along the circumferential direction of the material box 21, so as to ensure that the convex plate 225 can pass through the relief groove 112.

[0075] In the above embodiment, by rotating the material box, the discharge port can be opened and the grinding fineness can be adjusted. The functions of opening the discharge port and adjusting the gear are integrated. The user can realize the two functions respectively with only one rotation operation of the material box, which is simple and convenient to operate and has a better experience. At the same time, it can make the appearance of the grinding device more concise and beautiful. In addition, the hopper is only composed of a material box and a material door, and the structure of the hopper is simple, which is convenient to disassemble from the main body of the machine, and the cleaning and maintenance are also very simple and convenient. When the structure restricting the rotation of the material door following the material box on the main body of the machine is damaged, it is easy to find in time, and only the material door and the material box are installed on the main body of the machine, which is convenient for disassembly and repair. The structure restricting the rotation of the material door is arranged on the main body of the machine, while the structure driving the rotation of the material door is arranged on the rotating sleeve, which is convenient for installation and maintenance and has a low maintenance cost.

[0076] It should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0077] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent embodiments or changes made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A grinding device, comprising: A main body; A hopper detachably connected to the main body; A grinding assembly disposed in the main body, the grinding assembly including a first grinding element and a second grinding element, a grinding gap being formed between the first grinding element and the second grinding element, the first grinding element being driven to move relative to the main body to adjust the grinding gap, and the second grinding element being driven to rotate relative to the first grinding element to grind the raw material to be ground within the grinding gap; Characterized in that: the hopper includes a material box and a material door connected to the material box, a discharge port being provided at the bottom of the material box, the material door being selectively rotatable relative to the material box to open and close the discharge port; the grinding device further includes a rotating sleeve disposed in the main body, the rotating sleeve being disposed between the hopper and the first grinding element; the material box is circumferentially fixed to the rotating sleeve, and the material box can operably drive the rotating sleeve to rotate from a first interval to a second interval; in the first interval, the material door is fixed relative to the main body, and the material box drives the rotating sleeve to rotate relative to the main body to cause the material door to open the discharge port; in the second interval, the first grinding element is linked with the rotating sleeve, a transmission connection is established between the rotating sleeve and the material door, and the material box drives the rotating sleeve and the material door to rotate synchronously to adjust the grinding gap.

2. The grinding device according to claim 1, wherein In the second interval, along the direction from the second interval to the first interval, the material box drives the material door to reset synchronously through the transmission connection.

3. The grinding device according to claim 1, characterized in that A material door positioning structure is provided between the material door and the material box, the material door positioning structure including a positioning groove and a positioning element cooperating with the positioning groove, an installation groove being provided at the bottom of the material box, the positioning groove being provided on the end face of the material door facing the material box, and the positioning element being partially received in the installation groove and being snapped into the positioning groove under the action of an elastic force.

4. The grinding device according to claim 3, characterized in that, A plurality of baffles are circumferentially and spacedly provided at the bottom of the material box, the discharge port being formed between adjacent baffles, a connecting column being provided at the center of the bottom of the material box, each baffle being connected between the connecting column and the inner wall of the material box, and each baffle being configured to be inclined towards both sides and the bottom of the material box relative to the radial center line of the baffle, and the installation groove being provided at the connection between one of the baffles and the connecting column.

5. The grinding device according to claim 1, characterized in that, A material door locking structure is provided between the main body and the material door, the material door locking structure including a first limit pin provided on the main body and a limit groove provided on the material door, in the first interval, the first limit pin is snapped into the limit groove to limit the material door from rotating along with the material box.

6. The grinding device according to claim 5, characterized in that The material door locking structure further includes a second limit pin fixed relative to the first limit pin, and a guiding groove extending circumferentially is provided on the rotating sleeve; in the first interval, the first limit pin is snapped into the limit groove, the second limit pin is located in the guiding groove, and the first limit pin is restricted from moving in the direction of radially leaving the limit groove; in the second interval, the second limit pin is located outside the guiding groove, and the first limit pin is allowed to move in the direction of radially leaving the limit groove.

7. The grinding device according to claim 6, wherein, An installation box is connected to the main body. The first limit pin includes a support section away from the limit groove. The support section extends into the installation box. The first limit pin is connected to an elastic member, and the elastic member is sleeved on the support section in the installation box.

8. The grinding device according to claim 6, characterized in that, The swivel sleeve is provided with an edge extending circumferentially. The edge and the guide groove are arranged at intervals along the circumferential direction of the swivel sleeve. In the second interval, the second limit pin abuts against the edge and is guided to move along the radially outward direction.

9. The grinding device according to claim 5, characterized in that, Positioning protrusions are provided on the outer periphery of the material box. A relief groove for the positioning protrusions to pass through is provided on the main body. A convex plate extending upward from the bottom is provided on the outer periphery of the material door. The position and shape of the convex plate match those of the positioning protrusions. The limit groove is provided on the convex plate. The convex plate passes through the relief groove and cooperates with the first limit pin.

10. The grinding device according to claim 1, characterized in that, Positioning protrusions are provided on the outer periphery of the material box. A relief groove and a first blocking portion are arranged at intervals along the circumferential direction of the swivel sleeve on the main body. A second blocking portion is further provided on the main body. The second blocking portion is arranged between the relief groove and the first blocking portion and extends along the circumferential direction of the swivel sleeve. The positioning protrusion axially passes through the relief groove to rotate relative to the main body. The first blocking portion defines the terminal position of the positioning protrusion rotating relative to the main body. The second blocking portion restricts the positioning protrusion from axially separating from the main body.

11. The grinding device according to claim 1 or 2, characterized in that, A material door driving structure is arranged between the swivel sleeve and the material door. The material door driving structure includes a material door driving member arranged on the swivel sleeve. A locking groove is provided on the material door. In the first interval, the circumferential positions of the material door driving member and the locking groove are staggered. In the second interval, the material door driving member is snapped into the locking groove.

12. The grinding device according to claim 11, characterized in that, The swivel sleeve includes an end face recess. The hopper is installed on the main body corresponding to the end face recess. The locking groove is provided on the end face of the material door facing away from the material box. The material door driving member extends upward from the bottom of the end face recess under the action of elastic force to be snapped into the locking groove.

13. The grinding device according to claim 11, wherein, A ramp surface is provided on one side of the material door driving member along the circumferential direction of the swivel sleeve. When rotating from the second interval to the first interval, the locking groove crosses the ramp surface to separate the material door driving member from the material door.

14. The grinding device according to claim 1, characterized in that, A radially protruding flange is provided on the peripheral wall of the swivel sleeve. A microswitch is provided on the main body. Along the direction from the first interval to the second interval, the swivel sleeve has a first stroke and a second stroke. In the first stroke, the circumferential positions of the flange and the microswitch are staggered. In the second stroke, the flange triggers the microswitch.

15. The grinding device according to claim 1, wherein A material door locking structure is arranged between the main body and the material door. The material door locking structure includes a positioning groove arranged on the main body and a limit protrusion arranged on the material door. In the first interval, the limit protrusion is snapped into the positioning groove to restrict the material door from rotating with the material box.

16. The grinding device according to claim 15, characterized in that, A positioning protrusion is provided on the outer periphery of the material box, a relief groove for the positioning protrusion to pass through is provided on the main body, a convex plate extending upward from the bottom is provided on the outer periphery of the material door, the position and shape of the convex plate match those of the positioning protrusion, the limit protrusion is provided on the outer side of the convex plate, and the positioning groove is provided in the relief groove.

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