CN214317838U

CN214317838U - Bean grinder

Info

Publication number: CN214317838U
Application number: CN202022672909.5U
Authority: CN
Inventors: 王安之
Original assignee: Ningbo Mo Ning Cultural Creativity Co ltd
Current assignee: Ningbo Titan Outdoor Technology Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-10-01
Anticipated expiration: 2030-11-18

Abstract

The utility model relates to a grind utensil technical field, particularly, relate to a bean grinder, including casing, bean grinding mechanism and cup, be equipped with feed inlet and discharge gate on the casing, bean grinding mechanism establishes be suitable for grinding the beans on the casing, the cup cover is established the outside of casing and with the flexible cooperation of casing, just the inner chamber of cup with the discharge gate intercommunication, the cup has and accomodates and stretch out the state, the cup with be equipped with at least one between the casing give when the cup is in accomodating and stretching out the state the location structure of cup location. The bean grinder of the utility model can reduce the volume of the bean grinder in an unused state and reduce the carrying burden of an operator through the telescopic arrangement of the cup body; when the cup is in the state of stretching out, the cup is to the storage space increase of beans flour, and the operator need not frequently to lift the cup off and pour out the beans flour, and then can reduce the dismouting frequency of cup, improves the grinding efficiency of bean grinder.

Description

Bean grinder

Technical Field

The utility model relates to a grind utensil technical field particularly, relates to a bean grinder.

Background

The bean grinder on the market is of a handheld type, a desktop type and the like, wherein the handheld bean grinder is popular among people due to the characteristics of small size and portability. The existing handheld bean grinder mainly comprises a machine shell for grinding coffee beans or other bean granules, a grinding machine core arranged in the machine shell and used for grinding the bean granules, and a cup body clamped at the bottom of the machine shell and used for collecting bean powder.

However, in order to ensure the small and portable characteristics of the bean grinder, the size of the cup body is limited, and during grinding, an operator needs to frequently detach the cup body to pour out bean flour, which affects the grinding efficiency of the bean grinder.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem how to reduce cup dismouting frequency to improve the grinding efficiency of bean grinder.

In order to solve the problem, the utility model provides a bean grinder, include the casing, grind beans mechanism and cup, be equipped with feed inlet and discharge gate on the casing, grind beans mechanism and establish be suitable for on the casing and grind the beans grain, the cup cover is established the outside of casing and with the flexible cooperation of casing, just the inner chamber of cup with the discharge gate intercommunication, the cup has and accomodates and stretch out the state, the cup with be equipped with at least one between the casing give when the cup is in and accomodates and stretch out the state the location structure of cup location.

Compared with the prior art, the utility model can enlarge or reduce the containing space of the bean flour through the telescopic matching of the cup body and the casing, so that the volume of the bean grinder is reduced when the bean grinder is not used, and the carrying burden of an operator is reduced; when the cup body is in a storage state, the whole volume of the bean grinder can be effectively reduced, and the bean grinder has the characteristics of small size and portability; when the bean particles need to be ground, the cup body is in an extending state, the positioning structure positions the cup body, the bean particles are put into the shell through the feeding hole, ground into bean powder by the bean grinding mechanism and then stored in the cup body through the discharging hole; because the cup stretches out the storage space increase to the soybean meal, the operator need not frequently to lift the cup off and pour out the soybean meal, and then can reduce the dismouting frequency of cup, improves the grinding efficiency of bean grinder.

Furthermore, each positioning structure comprises a first clamping block, a second clamping block and a clamping groove; the first clamping block and the second clamping block are arranged on the outer side wall of the shell, the first clamping block is located above the second clamping block, and the clamping groove is formed in the cup body and is suitable for being clamped with the first clamping block or the second clamping block.

Through adopting above-mentioned technical scheme, when draw-in groove and first fixture block joint, the cup is in and accomodates the state, and when draw-in groove and second fixture block joint, the cup is in the state of stretching out, and the mode simple structure, the convenient operation of its joint location are convenient for the quick flexible location of cup, and the position of running about avoiding taking place between cup and the casing.

Furthermore, each positioning structure also comprises a first positioning groove, a second positioning groove and a positioning block; the first positioning groove and the second positioning groove are both formed in the outer side wall of the shell, the first positioning groove and the second positioning groove extend along the circumferential direction of the shell, the first clamping block is arranged in the first positioning groove, and the second clamping block is arranged in the second positioning groove; the positioning block is arranged on the cup body and is suitable for being clamped into the first positioning groove or the second positioning groove and sliding along the extending direction of the first positioning groove or the second positioning groove, and the clamping groove is formed in the positioning block.

Through adopting above-mentioned technical scheme, location structure when fixing a position the accomodating or the state of stretching out of cup, correspond the card earlier and go into first constant head tank or second constant head tank in the locating piece, conveniently carry out preliminary location to the cup, follow the circumferential direction rotation cup of casing afterwards to first fixture block or second fixture block and draw-in groove joint, realize the final location of cup, its mode through twice joint location helps the accurate joint of first fixture block or second fixture block and draw-in groove, improve the location efficiency of casing and cup.

Furthermore, the lateral wall of casing is in each location structure department is equipped with a guide way, the guide way is along the axis of casing extends, the one end of guide way with first constant head tank intercommunication, the other end of guide way with the second constant head tank intercommunication, the locating piece is suitable for the card to be gone into in the guide way and along the extending direction of guide way slides.

Through adopting above-mentioned technical scheme, the locating piece can be followed the guide way and slided between first constant head tank and second constant head tank, reduces the cup and takes place relative rotation with the casing at flexible in-process, improves the flexible efficiency of cup.

Furthermore, the lateral wall of casing is in each location structure department is equipped with an open slot, the one end of open slot with the second constant head tank is kept away from the one end intercommunication of guide way, the other end of open slot runs through to the lateral wall bottom of casing, the locating piece passes through the open slot card is gone into or the roll-off in the second constant head tank.

By adopting the technical scheme, the opening groove can clamp the positioning block into the second positioning groove or slide out of the second positioning groove to give way, so that the interference of the positioning block on the disassembly and assembly process of the cup body is reduced; when the cup body is installed, the positioning block is aligned below the open slot, then the cup body is pushed upwards, so that the positioning block is clamped into the second positioning slot along the open slot, and then the positioning block is rotated along the extending direction of the second positioning slot until the second clamping block is clamped into the clamping slot, so that the cup body and the shell are positioned in the extending state; when the cup body is dismounted, the positioning block is reversely rotated along the extending direction of the second positioning groove until the second clamping block is separated from the clamping groove, the block to be positioned slides to the joint of the second positioning groove and the open groove, the cup body is pulled downwards, the positioning block slides out of the open groove, and the cup body is separated from the shell.

Furthermore, a third clamping block suitable for being clamped with the clamping groove is arranged at the junction of the open groove and the second positioning groove on the machine shell.

Through adopting above-mentioned technical scheme, when the locating piece slided to the juncture of open slot and second constant head tank, the third fixture block card was gone into in the draw-in groove, can avoid operating personnel misoperation and make the locating piece directly pass through the open slot roll-off, and then increased the joint stability of cup and casing.

Further, grind beans mechanism includes outer whetstone, interior whetstone and pivot, outer whetstone is fixed on the inner wall of casing, interior whetstone is pegged graft the inboard of outer whetstone and with outer whetstone forms a mill beans clearance, the inside of casing is equipped with the positioning seat, the pivot is worn to establish on the positioning seat and is suitable for to drive interior whetstone for outer whetstone is rotatory.

Through adopting above-mentioned technical scheme, when grinding the beans, the positioning seat makes the pivot steadily rotatory, and the pivot is rotatory to be driven interior sharpedge grinding and is rotatory for outer sharpedge grinding, and the beans grain falls into and grinds in the beans clearance, and for the grinding mode of single sharpedge grinding, its two sharpenings grind the beans flour of results more exquisite, have better grinding effect.

Furthermore, grind beans mechanism still includes the handle, the pivot is kept away from the one end of interior sharpedge grinding passes the feed inlet with the handle drive is connected.

Through adopting above-mentioned technical scheme, this application adopts manual mode of grinding to be energy-concerving and environment-protective more for other electric drive modes such as motors, has lower production and use cost simultaneously.

Furthermore, the handle comprises a connecting rod and a shifting rod, the connecting rod is in transmission connection with the rotating shaft, and one end of the shifting rod is hinged to the connecting rod and is suitable for being overlapped with the connecting rod.

Through adopting above-mentioned technical scheme, the driving lever is through coincide with the connecting rod, can reduce the space occupation volume of handle, is convenient for accomodate and carry.

Further, be equipped with one on hand and be suitable for and close the end cover of feed inlet, seted up the confession on the end cover the fixed shaft hole of pivot joint.

Through adopting above-mentioned technical scheme, the handle passes through the end cover and is fixed with the pivot joint, not only can realize the drive of handle to the pivot, can also close the feed inlet and avoid beans grain to fall out from the feed inlet at the grinding in-process.

Drawings

Fig. 1 is an exploded view of a bean grinder according to an embodiment of the present invention;

fig. 2 is a schematic view of the internal structure of the bean grinder according to the embodiment of the present invention;

fig. 3 is a schematic view of the internal structure of a handle of a bean grinder according to an embodiment of the present invention;

FIG. 4 is an enlarged view of FIG. 1 at A;

FIG. 5 is an enlarged view of FIG. 1 at B;

fig. 6 is an enlarged view of fig. 1 at C.

Description of reference numerals:

1-a machine shell; 11-a feed inlet; 12-a discharge hole; 13-positioning seat; 131-a through hole; 14-a guide groove; 15-open slots; 2-the cup body; 3-a positioning structure; 31-a first cartridge; 32-a second fixture block; 33-card slot; 34-a first positioning groove; 35-a second positioning groove; 36-a positioning block; 37-a third fixture block; 4-external grinding; 5-internal sharpening; 6-a rotating shaft; 61-a positioning ring; 7-a handle; 71-a connecting rod; 711-first cylinder; 72-a deflector rod; 721-a second cylinder; 73-connecting shaft; 74-end cap; 741-a bump; 742-an axle hole; 75-a handle; 8-a limit ring; 9-decorative ring.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it should be noted that terms such as "upper", "lower", "front", "rear", and the like in the embodiments indicate terms of orientation, and are only used for simplifying the description of positional relationships based on the drawings of the specification, and do not represent that the elements, devices, and the like indicated in the description must be operated according to specific orientations and defined operations and methods, configurations, and such terms of orientation do not constitute limitations of the present invention. In the embodiments, the references to "inner" and "outer" refer to the inner side of the case and the outer side of the case with respect to a chamber structure, such as a case.

In addition, the drawings of the embodiments of the present invention are provided with coordinate axes Z, wherein the forward direction of the Z axis represents the upper side, and the reverse direction of the Z axis represents the lower side.

The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein.

The utility model provides a bean grinder, refer to fig. 1, including casing 1, bean grinding mechanism, cup 2 and at least one location structure 3.

In addition, referring to fig. 2, the casing 1 may be configured to have a cylindrical shape, a rectangular cylindrical shape, or other shapes as needed, and the cylindrical shape is specifically described as an example in the present embodiment. The top of casing 1 is equipped with feed inlet 11, and the bottom of casing 1 is equipped with discharge gate 12, and the inside of casing 1 is equipped with a positioning seat 13 in an organic whole between feed inlet 11 and discharge gate 12, and positioning seat 13 evenly separates along the circumference of casing 1 to be equipped with a plurality of through-holes 131, and feed inlet 11 and discharge gate 12 pass through-hole 131 intercommunication.

The bean grinding mechanism is arranged on the machine shell 1 and is suitable for grinding bean granules into bean powder, and comprises an external grinding knife 4, an internal grinding knife 5, a rotating shaft 6 and a handle 7. The external grinding knives 4 are fixed on the inner wall of the casing 1 facing the discharge port 12, and the top of the external grinding knives is abutted against the bottom of the positioning seat 13 to prevent the external grinding knives 4 from sliding upwards. The outer grinding knife 4 is in a circular ring shape, the inner grinding knife 5 is inserted into the inner side of the outer grinding knife 4 and forms a bean grinding gap with the outer grinding knife 4, and an opening at the upper end of the bean grinding gap is larger than an opening at the lower end of the bean grinding gap, so that bean grains can be conveniently embedded into the bean grinding gap to be ground. The inner sharpening 5 is in a circular truncated cone shape, and the circular truncated cone surface at the lower side of the inner sharpening abuts against the cutting edge of the outer sharpening 4 and is used for limiting the bottom of the outer sharpening 4 and preventing the outer sharpening 4 from sliding downwards.

The rotating shaft 6 axially penetrates through the positioning seat 13 and rotates relative to the positioning seat 13 through a bearing, and two ends of the rotating shaft 6 are respectively located at the upper side and the lower side of the positioning seat 13. The upper side of the rotating shaft 6 is integrally provided with a positioning ring 61, and the positioning ring 61 abuts against the top of the positioning seat 13 and is used for axially positioning the rotating shaft 6. The fixed cover of downside of pivot 6 is equipped with a spacing ring 8, and interior sharpener 5 fixed cover is established on pivot 6, and the top of interior sharpener 5 offsets with the bottom of positioning seat 13, and the bottom of interior sharpener 5 offsets with the bottom of holding ring 61, and pivot 6 and then drive interior sharpener 5 and rotatory for outer sharpener 4.

When grinding the beans, positioning seat 13 makes 6 steady rotations of pivot, and the interior knife sharpening 5 of the rotatory drive of pivot 6 is rotatory for 4 rotations of outer knife sharpening, and the beans falls into and grinds in the beans clearance, and for the grinding mode of single knife sharpening, the beans flour of its two knife sharpening grinding results is more exquisite, has better grinding effect.

The mode that this embodiment adopted handle 7 to carry out manual grinding is energy-concerving and environment-protective more for other electric drive modes such as motors, has lower production and use cost simultaneously. Referring to fig. 3, the handle 7 includes a link 71 and a lever 72. One end of the connecting rod 71 is in transmission connection with the rotating shaft 6, and one end of the shift lever 72 is hinged to one end of the connecting rod 71 away from the rotating shaft 6 and is suitable for being overlapped with the connecting rod 71. Therefore, the volume occupied by the space of the handle 7 is reduced by overlapping the deflector rod 72 and the connecting rod 71, and the bean grinder is convenient to store and carry.

The structure of the connecting rod 71 hinged to the shift lever 72 can be adjusted as required, and the structure of the embodiment for connecting the connecting rod 71 hinged to the shift lever 72 specifically includes a first cylinder 711, two second cylinders 721 and a connecting shaft 73, wherein the two second cylinders 721 are integrally disposed on the shift lever 72 and axially spaced, the first cylinder 711 is integrally disposed on the connecting rod 71 and can be inserted into a gap formed by the two second cylinders 721, and the connecting shaft 73 is simultaneously inserted into the first cylinder 711 and the second cylinder 721 to realize the turning and folding of the connecting rod 71 and the shift lever 72.

An end cover 74 suitable for closing the feed port 11 is integrally arranged at one end of the connecting rod 71 far away from the shifting rod 72, a protruding block 741 is arranged on the outer side end face of the end cover 74, the connecting rod 71 is connected with the end cover 74 through the protruding block 741, and a shaft hole 742 for clamping and fixing the rotating shaft 6 is formed in the opposite position of the protruding block 741 on the inner side end face of the end cover 74. Therefore, the handle 7 is fixedly clamped with the rotating shaft 6 through the end cover 74, so that the rotating shaft 6 can be driven by the handle 7, and the feed port 11 can be closed to prevent bean grains from falling out of the feed port 11 in the grinding process. The protrusion 741 can, on one hand, achieve connection between the end cap 74 and the handle 7, and on the other hand, can also increase the local thickness of the end cap 74, which is helpful for forming a relatively deep shaft hole 742, thereby increasing the clamping effect between the rotating shaft 6 and the end cap 74. In this embodiment, the top of the rotating shaft 6 and the shaft hole 742 are both hexagonal prisms, which can effectively prevent the rotating shaft 6 and the end cap 74 from rotating relatively, and other structures are also possible.

The shifting rod 72 is further fixed with a grab handle 75 at a section away from the connecting rod 71, which is convenient for an operator to hold and is helpful for improving the grinding efficiency of the operator on the bean particles.

Cup 2 is the cylindric of opening up, and cup 2 from bottom to top overlaps the outside of establishing casing 1 and with casing 1 flexible cooperation, and the inner chamber of cup 2 and the discharge gate 12 intercommunication of casing 1, and it has accomodates and stretches out the state for accomodate the soybean powder. The top of the cup body 2 is also clamped and sleeved with a decorative ring 9 which can not only shield the gap between the cup body 2 and the casing 1, thereby increasing the aesthetic degree of the bean grinder, but also increasing the friction damping between the cup body 2 and the casing 1 to a certain extent, and avoiding the automatic falling caused by overlarge gap and no positioning between the two. In addition, the decorative ring 9 can be used for improving hand feeling and facilitating hand-held grinding of operators.

Location structure 3 establishes between cup 2 and casing 1 and gives the cup 2 location when cup 2 is in the state of accomodating and stretching out, and location structure 3 in this embodiment is provided with three along the even interval of casing 1's circumference, helps cup 2 to stretch out and draw back steadily. Compared with the existing bean grinder, the bean grinder of the embodiment can enlarge or reduce the containing space of bean flour by the telescopic matching of the cup body 2 and the casing 1, so that the volume of the bean grinder is reduced when the bean grinder is not used, and the carrying burden of an operator is reduced.

With reference to fig. 4 to 6, each positioning structure 3 includes a first latch 31, a second latch 32 and a latch slot 33. The first fixture block 31 and the second fixture block 32 are both disposed on the outer sidewall of the casing 1, the first fixture block 31 is located above the second fixture block 32, and the slot 33 is disposed on the cup body 2. When draw-in groove 33 and first fixture block 31 joint, cup 2 is in the state of accomodating, and when draw-in groove 33 and second fixture block 32 joint, cup 2 is in the state of stretching out, and the mode simple structure, the convenient operation of its joint location are convenient for cup 2's quick flexible location, avoid taking place between cup 2 and the casing 1 and run the position from top to bottom.

In addition, each positioning structure 3 further comprises a first positioning slot 34, a second positioning slot 35 and a positioning block 36. The first positioning groove 34 and the second positioning groove 35 are both provided on the outer side wall of the casing 1, and the first positioning groove 34 and the second positioning groove 35 extend along the circumferential direction of the casing 1. The first latch 31 protrudes into the first positioning groove 34, and the second latch 32 protrudes into the second positioning groove 35, which are both long-shaped and have vertical length directions. The positioning block 36 is protruded on the cup body 2, and is suitable for being clamped into the first positioning groove 34 or the second positioning groove 35 and sliding along the extending direction of the first positioning groove 34 or the second positioning groove 35. In this embodiment, the locking slots 33 of the three positioning structures 3 are correspondingly formed on the three positioning blocks 36, and are further used for matching with the locking of the corresponding first locking block 31 or second locking block 32.

Location structure 3 when fixing a position cup 2's accomodating or the state of stretching out, earlier go into first constant head tank 34 or second constant head tank 35 with the corresponding card of locating piece 36, conveniently tentatively fix a position cup 2, follow casing 1's circumferential direction rotation cup 2 again afterwards to first fixture block 31 or second fixture block 32 and draw-in groove 33 joint, realize cup 2's final location, it helps the accurate joint of first fixture block 31 or second fixture block 32 and draw-in groove 33 through the mode of twice joint location, improve casing 1 and cup 2's positioning efficiency.

The lateral wall of casing 1 corresponds in every location structure 3 department and has seted up a guide way 14, guide way 14 extends along casing 1's axis, the one end and the first constant head tank 34 intercommunication of guide way 14, the other end and the second constant head tank 35 intercommunication of guide way 14, locating piece 36 is suitable for the card to go into in the guide way 14 and slide along the extending direction of guide way 14, and then reduce cup 2 and take place relative rotation with casing 1 at flexible in-process, improve the flexible efficiency of cup 2. The outer side wall of the casing 1 is divided into left and right sides by taking the guide groove 14 as a center line, the first positioning groove 34 and the second positioning groove 35 may be located on the same side of the guide groove 14, or on different sides of the guide groove 14, which is shown on the same side of the guide groove 14 in this embodiment.

The outer side wall of the casing 1 is also correspondingly provided with an open slot 15 at each positioning structure 3, one end of the open slot 15 is communicated with one end of the second positioning slot 35 connected with the guide slot 14, the other end of the open slot 15 penetrates through the bottom of the outer side wall of the casing 1, and the positioning block 36 is clamped into or slides out of the second positioning slot 35 through the open slot 15. The opening groove 15 can be used for clamping the positioning block 36 into the second positioning groove 35 or sliding out of the second positioning groove 35 to give way, so that the interference of the positioning block 36 on the disassembly and assembly process of the cup body 2 is reduced.

A third latch 37 adapted to be latched with the latch slot 33 is protruded from the connection portion of the opening slot 15 and the second positioning slot 35 of the casing 1. When the positioning block 36 slides to the junction of the open slot 15 and the second positioning slot 35, the third fixture block 37 is clamped into the clamping slot 33, so that the positioning block 36 can be prevented from directly sliding out through the open slot 15 due to misoperation of an operator, and the clamping stability of the cup body 2 and the shell 1 is further improved.

When the cup body 2 is installed, the positioning block 36 is aligned below the opening slot 15, and then the cup body 2 is pushed upwards, so that the positioning block 36 is clamped into the second positioning slot 35 along the opening slot 15, and then the positioning block 36 is rotated along the extending direction of the second positioning slot 35 until the second clamping block 32 is clamped into the clamping slot 33, thereby realizing the positioning of the cup body 2 and the casing 1 in the extending state.

The positioning block 36 continues to rotate in the same direction along the extending direction of the second positioning groove 35 until the second engaging block 32 is separated from the engaging groove 33, the positioning block 36 is engaged with the guiding groove 14, the positioning block 36 is then pushed upwards to be engaged with the first positioning groove 34, and then the positioning block 36 rotates along the extending direction of the first positioning groove 34 until the first engaging block 31 is engaged with the engaging groove 33, so that the cup body 2 and the housing 1 are positioned in the accommodating state.

When the cup body 2 is detached, the positioning block 36 is rotated reversely to the second clamping block 32 and the clamping groove 33 along the extending direction of the second positioning groove 35 of the extended cup body 2, the to-be-positioned block 36 slides to the joint of the second positioning groove 35 and the opening groove 15, the cup body 2 is pulled downwards, the positioning block 36 slides out of the opening groove 15, and the cup body 2 is separated from the casing 1.

Besides the above-mentioned snap-fit positioning manner, the positioning structure 3 can also realize the telescopic positioning of the cup body 2 and the casing 1 in other manners such as thread engagement, bolt positioning, and the like.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to fall within the scope of the present disclosure.

Claims

1. The utility model provides a bean grinder, its characterized in that includes casing (1), grinds beans mechanism and cup (2), be equipped with feed inlet (11) and discharge gate (12) on casing (1), it establishes to grind beans mechanism be suitable for on casing (1) to grind the beans, cup (2) cover is established the outside of casing (1) and with casing (1) flexible cooperation, just the inner chamber of cup (2) with discharge gate (12) intercommunication, cup (2) have and accomodate and stretch out the state, cup (2) with be equipped with at least one between casing (1) and give when cup (2) are in and accomodate and stretch out the state location structure (3) of cup (2) location.

2. The bean grinder according to claim 1, characterized in that each of the positioning structures (3) comprises a first block (31), a second block (32) and a block slot (33); the first clamping block (31) and the second clamping block (32) are arranged on the outer side wall of the shell (1), the first clamping block (31) is located above the second clamping block (32), and the clamping groove (33) is formed in the cup body (2) and is suitable for being clamped with the first clamping block (31) or the second clamping block (32).

3. A bean grinder as claimed in claim 2, characterized in that each of said positioning structures (3) further comprises a first positioning slot (34), a second positioning slot (35) and a positioning block (36); the first positioning groove (34) and the second positioning groove (35) are both formed in the outer side wall of the machine shell (1), the first positioning groove (34) and the second positioning groove (35) extend along the circumferential direction of the machine shell (1), the first clamping block (31) is arranged in the first positioning groove (34), and the second clamping block (32) is arranged in the second positioning groove (35); establish locating piece (36) on cup (2), locating piece (36) are suitable for the card to be gone into in first constant head tank (34) or second constant head tank (35) and follow first constant head tank (34) or the extending direction of second constant head tank (35) slides, draw-in groove (33) are seted up on locating piece (36).

4. A bean grinder as claimed in claim 3, characterized in that the outer side wall of the housing (1) is provided with a guide groove (14) at each of the positioning structures (3), the guide groove (14) extends along the axis of the housing (1), one end of the guide groove (14) communicates with the first positioning groove (34), the other end of the guide groove (14) communicates with the second positioning groove (35), and the positioning block (36) is adapted to be snapped into the guide groove (14) and to slide along the extension direction of the guide groove (14).

5. The bean grinder according to claim 4, characterized in that an open slot (15) is formed in the outer side wall of the housing (1) at each positioning structure (3), one end of the open slot (15) is communicated with one end of the second positioning groove (35) connected with the guide groove (14), the other end of the open slot (15) penetrates through the bottom of the outer side wall of the housing (1), and the positioning block (36) is clamped into or slid out of the second positioning groove (35) through the open slot (15).

6. Bean grinder as in claim 5, characterized in that the housing (1) is provided with a third catch (37) at the intersection of the opening slot (15) and the second positioning slot (35) adapted to engage with the catch (33).

7. The bean grinder according to claim 1, characterized in that the bean grinding mechanism comprises an outer grinding blade (4), an inner grinding blade (5) and a rotating shaft (6), the outer grinding blade (4) is fixed on the inner wall of the casing (1), the inner grinding blade (5) is inserted into the inner side of the outer grinding blade (4) and forms a bean grinding gap with the outer grinding blade (4), a positioning seat (13) is arranged inside the casing (1), and the rotating shaft (6) penetrates through the positioning seat (13) and is suitable for driving the inner grinding blade (5) to rotate relative to the outer grinding blade (4).

8. The bean grinder according to claim 7, characterized in that the bean grinding mechanism further comprises a handle (7), and one end of the rotating shaft (6) far away from the inner grinding blade (5) passes through the feed port (11) to be in driving connection with the handle (7).

9. Bean grinder as in claim 8, characterized in that the handle (7) comprises a connecting rod (71) and a lever (72), the connecting rod (71) being in driving connection with the rotating shaft (6), one end of the lever (72) being hinged to the connecting rod (71) and adapted to overlap the connecting rod (71).

10. The bean grinder according to claim 8, characterized in that the handle (7) is provided with an end cover (74) suitable for closing the feed port (11), and the end cover (74) is provided with a shaft hole (742) for clamping and fixing the rotating shaft (6).