CN217118220U - Bean grinding machine capable of precisely adjusting gears from outer ring - Google Patents

Abstract

The utility model provides a bean grinder with the gear precisely adjusted from the outer ring, which comprises a grinding cup, an outer grinding disc arranged in the grinding cup, an inner grinding core matched with the outer grinding disc and a main shaft with the lower end fixedly connected with the inner grinding core; an adjusting ring is screwed on the outer ring thread of the upper end of the grinding cup, a gear indicating mark is arranged on the outer surface of the adjusting ring, an upper shaft hole is formed in the adjusting ring, an upper bearing is arranged in the upper shaft hole, and the upper tail end of the main shaft penetrates through the upper shaft hole through the upper bearing; a limiting part is arranged in the adjusting ring, and a blocking rib capable of blocking the limiting part is arranged on the inner wall of the grinding cup; a plurality of gear grooves are uniformly distributed on the inner circumference of the adjusting ring, and a gear mechanism matched with the gear grooves is arranged at the upper tail end of the grinding cup. The adjusting ring can accurately complete all gear adjustment within a circle of rotation, and has the advantages of simple overall structure, more gear number, high adjusting precision, convenience in adjustment and use, low manufacturing cost and the like.

Description

Bean grinding machine capable of precisely adjusting gears from outer ring

Technical Field

The utility model belongs to the technical field of the coffee bean grinding technique and specifically relates to a follow bean grinder of outer lane accurate adjustment gear is related to.

Background

Most of the existing coffee bean grinding machines can adjust the thickness of coffee powder in various ways. The mainstream product is through setting up screw thread adjusting nut at main shaft upper portion or main shaft lower part, adjusts mill clearance size through the elasticity of rotatory adjusting nut, reaches the purpose of adjusting coffee powder thickness, but, needs the user to judge the rotational position of adjusting nut by experience in order to obtain the coffee powder thickness that the user needs, leads to using very inconveniently.

For this reason, some improved solutions have been developed in succession. For example, some technical solutions are to perform positioning of a rotation gear on a lower adjusting knob and a grinding disc, and this method needs to disassemble a powder box and clamp a spindle to adjust, which is troublesome to operate and not accurate enough in positioning.

For another example, the hand-operated bean grinder disclosed in chinese patent CN2021218642022 includes a grinding cup, a grinding ring, a grinding core, a driving assembly, an adjusting knob, a main spring, a frame body and a connector, wherein the bottom of the connector is movably abutted to the top of the frame body, the adjusting knob is movably abutted to the top of the connector, and an inner tooth hole at the top of the driving assembly is in threaded connection with an outer tooth shaft at the bottom of the adjusting knob. The adjusting knob of the technical scheme needs to be in threaded connection with the top of the driving assembly by means of the connector, the structure is complex, and the implementation cost is high; need be provided with a plurality of recesses of arranging along circumference through adjust knob's carousel bottom, utilize recess and steel ball cooperation to produce the feeling of feedback sound and screens at adjust knob pivoted in-process, however, adjust knob's carousel bottom surface size is less, can't arrange more recess in the carousel bottom, leads to adjust knob's gear quantity limited, is difficult to realize the meticulous regulation to the coffee powder thickness.

For another example, the hand coffee bean grinder disclosed in CN204931446U supports an adjusting ring at the upper end of the rotating shaft, and the outer circumference of the adjusting ring is in threaded connection with the inner circumference of the upper part of the cylinder to realize gear adjustment. However, the number of turns of the adjusting ring on the cylinder is not limited by the technical scheme, and the adjusting ring can rotate for several turns in the gear shifting process, so that the gear can be confirmed only by confirming the number of turns of the adjusting ring before the gear is used by a user, and the gear shifting device is troublesome to operate and inconvenient to use.

SUMMERY OF THE UTILITY MODEL

For solving the technical defect who exists among the prior art, the utility model provides a follow bean grinder of outer lane accurate adjustment gear lets the adjustable ring can accurately accomplish all gear from the outer lane of grinding the cup and adjust in order to realize the meticulous regulation to coffee powder thickness, simple structure and operation convenient to use in rotatory round within range.

The utility model provides a bean grinder with the gear precisely adjusted from the outer ring, which comprises a grinding cup, an outer grinding disc arranged in the grinding cup, an inner grinding core matched with the outer grinding disc and a main shaft with the lower end fixedly connected with the inner grinding core; an adjusting ring is screwed on the outer ring thread of the upper end of the grinding cup, a gear indicating mark is arranged on the outer surface of the adjusting ring, an upper shaft hole is formed in the adjusting ring, an upper bearing is arranged in the upper shaft hole, the upper tail end of the main shaft penetrates through the upper shaft hole through the upper bearing, and the main shaft is abutted to the upper end face of the inner ring of the upper bearing through a retaining ring; a detachable limiting part is arranged inside the adjusting ring, and a blocking rib capable of blocking the limiting part is arranged on the inner wall of the grinding cup; a plurality of gear grooves are uniformly distributed on the inner circumference of the adjusting ring, and a gear mechanism matched with the gear grooves is arranged at the upper tail end of the grinding cup.

Wherein, the lateral surface of grinding cup upper end is equipped with the external screw thread, and the medial surface correspondence of adjustable ring is equipped with the internal thread, and the screw thread interval of internal thread and external screw thread is 1.5~2.5mm, closes soon through internal thread and external screw thread and links to each other.

Wherein, the bottom of adjustable ring is equipped with the straight body position of no screw thread apart from between the internal thread.

The gear indication mark is uniformly marked with gear information, and the position of each gear information corresponds to the position of the gear groove one to one.

Wherein, the lower extreme of adjustable ring is the chamfer lower part that the chamfer set up, and gear indicator sets up the circumferential surface in chamfer lower part.

The gear mechanism comprises a limiting hole formed in the grinding cup, an elastic piece arranged in the limiting hole and a limiting bead connected with the elastic piece, and the limiting bead is partially exposed out of the limiting hole and is limited in one gear groove.

The upper end of the upper shaft hole is provided with a first bearing step, the upper bearing is arranged on the first bearing step, the main shaft is provided with a baffle ring, and the baffle ring is abutted against the upper end face of the inner ring of the upper bearing.

Wherein, the baffle ring and the main shaft are fixed by double nut interlocking, welding, thread gluing or side locking screws.

Wherein, mill beans machine still include: the grinding cup comprises a powder cup detachably connected with the bottom of the grinding cup and a driving mechanism fixedly connected with a main shaft.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a set up the cooperation structure of locating part and fender muscle between adjustable ring and the grinding cup, can't cross the fender muscle at rotation adjustable ring in-process locating part, grind the cup screw thread with adjustable ring relatively and close the rotation restriction in the round soon, let the adjustable ring accomplish all gear regulation in order to realize the meticulous regulations to the coffee powder thickness at rotatory round within range accuracy from the outer lane of grinding cup, avoid gear adjustment in-process adjustable ring relatively grind the cup and close the rotation and lead to being difficult to confirm the gear easily when exceeding the round soon, be favorable to simplifying the operation with convenient use.

2. The utility model discloses directly close the adjustable ring screw thread at the outer lane of grinding the cup soon, the user of not only being convenient for can rotate the adjustable ring in order conveniently to carry out the gear from the outer lane of grinding the cup and adjust, still let the size of adjustable ring not be subject to the internal diameter size of grinding the cup, thereby the adjustable ring is makeed bigger size than the grinding cup external diameter, be convenient for like this distribute on the inboard circumference of adjustable ring and set up the gear groove that the quantity is more, thereby let the bean grinder have more gears, for the adjustable ring carries out many gears precision adjustment in rotatory round and provides the solution in order to realize the fine adjustment to coffee powder. In addition, the adjusting ring and the grinding cup are assembled and connected without other parts, so that the integral structure is simplified; the gear indicating mark on the adjusting ring can be exposed outside, so that the gear indicating mark is convenient for a user to observe during use and is convenient to use.

3. The utility model discloses still cooperate with the gear groove through setting up gear mechanism, can close soon to the screw thread of adjusting ring relative grinding cup and rotate and carry on spacingly, can enough make the adjustable ring can not take place the self-rotation through gear mechanism and gear groove cooperation when the gear is adjusted, rotate the feeling of adjustable ring and experience in order to improve the use when can improving the gear adjustment again.

Drawings

FIG. 1 is one of the exploded perspective views of a bean grinder;

FIG. 2 is a second exploded perspective view of the bean grinder;

FIG. 3 is a schematic view of the structure of the adjustment ring;

FIG. 4 is a schematic view of a three-dimensional assembly structure of the bean grinder;

fig. 5 is a schematic view of the internal structure of the bean grinder.

The meanings of the reference symbols in the figures are as follows:

1-grinding cup, 11-external thread, 12-stop rib, 13-lower shaft hole, 2-adjusting ring, 22-upper shaft hole, 23-fixing hole, 24-chamfered lower part, 25-gear groove, 26-limiting part, 27-internal thread, 28-straight body position, 31-outer grinding disc, 32-inner grinding core, 41-main shaft, 42-lower bearing, 43-pressure spring, 44-upper bearing, 45-locking part, 46-stop ring, 5-powder cup, 6-manual component, 61-connector, 62-handle, 63-cover plate, 71-elastic part and 72-limiting bead.

Detailed Description

To further clarify the technical solutions and effects adopted by the present application to achieve the intended purpose, the following detailed description is given with reference to the accompanying drawings and preferred embodiments according to the present application. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

Referring to fig. 1-5, the utility model provides a bean grinder with gear precisely adjusted from the outer ring, which comprises a grinding cup 1, an outer grinding disc 31 arranged in the grinding cup 1, an inner grinding core 32 matched with the outer grinding disc 31, and a main shaft 41 with the lower end fixedly connected with the inner grinding core 32; an adjusting ring 2 is screwed on the outer ring (or the outer circumferential surface) of the upper end of the grinding cup 1 in a threaded manner, the outer surface of the adjusting ring 2 is provided with a gear indication mark, an upper shaft hole 22 is formed inside the adjusting ring 2, an upper bearing 44 is arranged in the upper shaft hole 22, and the upper tail end of a main shaft 41 penetrates through the upper shaft hole 22 through the upper bearing 44; a detachable limiting part 26 is arranged in the adjusting ring 2, and a stop rib 12 capable of stopping the limiting part 26 is arranged on the inner wall of the grinding cup 1; a plurality of gear grooves 25 are uniformly distributed on the inner side circumference of the adjusting ring 2, and a gear mechanism matched with the gear grooves 25 is arranged at the upper end of the grinding cup 1.

The utility model provides a bean grinder through closing adjustable ring 2 soon in grinding cup 1's outer lane, directly rotates adjustable ring 2 that is located grinding cup 1's outer lane and carries out the gear regulation in order to realize adjusting the gear from the outer lane, compares prior art and establishes adjustable ring 2 at grinding cup 1 inside, and convenience of customers's operation use more. Compared with the prior art, the improvement of the technical scheme and the corresponding technical effect can be obtained as follows:

1. the utility model discloses directly close the 2 screw threads of adjustable ring at grinding cup 1 upper portion lateral surface soon, can obtain the technological effect in several aspects as follows at least: firstly, the adjusting ring 2 and the grinding cup 1 are assembled and connected without other parts, so that the integral structure is simplified; secondly, the gear indication mark on the adjusting ring 2 is exposed outside, so that the gear indication mark is convenient for a user to observe during use; thirdly, the condition is provided for the adjusting ring 2 to be manufactured into a larger size, and a plurality of gear grooves 25 can be distributed on the inner circumference, so that the bean grinder has more gears, and a solution is provided for fine adjustment of the thickness of the coffee powder.

2. The utility model discloses a set up locating part 26 and keep off muscle 12 cooperation structure between adjustable ring 2 and the grinding cup 1, can't cross fender muscle 12 rotating adjustable ring 2 in-process locating part 26 to the restriction that closes soon with adjustable ring 2 relative grinding cup 1 screw thread in the gear adjustment process at the round, avoid in the gear adjustment process adjustable ring 2 to close soon and lead to confusion or mistake regulation easily when exceeding the round, thereby facilitate the use.

3. Cooperate through gear mechanism and gear groove 25, can close soon to the screw thread that grinds cup 1 relatively to adjusting ring 2 and rotate and carry on spacingly, can enough cooperate through gear mechanism and gear groove 25 when the gear is adjusted and make adjustable ring 2 can not take place the self-rotation, rotate the feel of adjustable ring 2 when can improving the gear again and adjust in order to improve and use experience.

The inner grinding core 32 is a tapered grinding disc with a small upper part and a large lower part, after the lower tail end of the main shaft 41 penetrates through the inner grinding core 32, the lower tail end of the main shaft 41 and the inner grinding core 32 are locked and assembled by a locking piece 45, so that the main shaft 41 can drive the inner grinding core 32 to rotate relative to the outer grinding disc 31; the lower part of the inner ring of the outer grinding disc 31 is provided with a tapered surface which is small at the top and big at the bottom and is matched with the inner grinding core 32, and the upper part of the inner ring of the outer grinding disc 31 is provided with a tapered surface which is large at the top and big at the bottom. Thus, when the gap between the inner grinding core 32 and the outer grinding disc 31 is changed, it is possible to correspondingly change the coffee powder obtained by the bean grinder when grinding coffee beans to different thicknesses.

Wherein, the outer side of the upper end of the grinding cup 1 is provided with an external thread 11, the inner side of the adjusting ring 2 is correspondingly provided with an internal thread 27, and the internal thread 27 is screwed with the external thread 11. Therefore, the utility model discloses a rotate adjustable ring 2, let adjustable ring 2 grind cup 1 relatively and produce axial displacement to select to rotate adjustable ring 2 and grind cup 1 relatively and produce suitable axial displacement through the selection rotation gear, thereby let adjustable ring 2 drive main shaft 41 produce corresponding axial displacement in the axial, thereby reach and adjusted the clearance size between interior grinding core 32 and the outer mill 31 and change the thickness of grinding coffee.

The pitch between the internal thread 27 and the external thread 11 is 1.5 to 2.5 mm. The adjustment range of the gap size between the inner grinding core 32 and the outer grinding disc 31 can be quantitatively determined through the thread pitch. The utility model discloses a locating part 26 and fender muscle 12 cooperate, with the rotatory restriction that closes of the relative grinding cup 1 of adjustable ring 2 in the round, be 1.5~2.5mm through setting up the screw thread interval between adjustable ring 2 and the grinding cup 1, let adjustable ring 2 can let the relative outer mill 31 of interior grinding core 32 also be 1.5~2.5mm along with the axial displacement scope that main shaft 41 produced in rotatory round within range, the corresponding clearance size control range between interior grinding core 32 and the outer mill 31 of bringing of this axial displacement scope, can satisfy the required control range of the thickness of milling of coffee beans.

Furthermore, the utility model discloses directly close adjusting ring 2 screw thread soon at grinding cup 1 upper portion lateral surface, let adjusting ring 2's size not be limited by grinding cup 1's internal diameter size to adjusting ring 2 makes into than grinding cup 1 external diameter bigger size, is convenient for like this to distribute on adjusting ring 2's inboard circumference and sets up the gear groove 25 that the quantity is more, thereby let the bean grinder have more gears, provide the solution for adjusting ring 2 carries out many gears accurate adjustment in order to realize the meticulous regulation to the coffee powder in rotatory round. For example, it has 60 gear grooves 25 to distribute on the inboard circumference of adjustable ring 2, when utilizing gear mechanism and gear groove 25 cooperation, it has 60 adjustable gears to correspond in the relative grinding cup 1 of adjustable ring 2 rotates the round, every gear correspondence can let the axial displacement that interior grinding core 32 produced for outer mill 31 be the 1/60 of screw thread interval 1.5~2.5mm, let the regulation step length that every gear corresponds very little, thereby carry out the gear through rotating adjustable ring 2 and adjust and can carry out the fine adjustment of coffee to the bean grinder.

Gear information is uniformly marked on the gear indication mark, and the position of each gear information corresponds to the position of the gear groove 25 one by one; and the outer side surface of the grinding cup 1 is provided with a gear determining position 10, and when the gear determining position 10 is aligned with certain gear information on the gear indicating mark, the gear is currently adjusted to.

Wherein, the lower extreme of adjustable ring 2 is chamfer lower part 24 that the chamfer set up, and gear indicator sets up the peripheral surface in chamfer lower part 24 in order to do benefit to the user and observe.

The gear mechanism has various specific structures. For example, a limiting hole is arranged on the grinding cup 1, an elastic piece 71 and a limiting bead 72 connected with the elastic piece 71 are arranged in the limiting hole, part of the limiting bead 72 is exposed out of the limiting hole, and the limiting bead 72 is limited in one of the gear grooves 25 under the action of the elastic piece 71. And when adjusting ring 2 is rotated, let spacing pearl 72 remove from current gear groove 25 and spacing to next gear groove 25 in, produce obvious pause and frustrate because of spacing pearl 72 and the cooperation of gear groove 25 feel at this in-process to improve the feel of gear adjustment and strengthen user's use and experience. The elastic member 71 is a spring or a leaf spring.

Furthermore, the bottom end of the adjusting ring 2 is provided with a straight body 28 without threads between the internal threads 27, and the straight body 28 shields the external threads 11 on the outer side surface of the grinding cup 1, so that the whole appearance of the bean grinder is more attractive.

Furthermore, a first bearing step is provided at the upper end of the upper shaft hole 22, the upper bearing 44 is provided on the first bearing step, a stopper ring 46 is provided on the main shaft 41, the stopper ring 46 abuts against the inner ring upper end surface of the upper bearing 44, and the axial movement of the main shaft 41 relative to the adjusting ring 2 is restricted by the stopper ring 46. The retaining ring 46 and the main shaft 41 can be fixed in various ways, such as double-nut interlocking, welding, thread gluing, side locking screws and the like, so that displacement can be prevented, and a user can be prevented from easily detaching the retaining ring and the main shaft to ensure the complete machine of the bean grinder to work reliably.

Of course, the grinding cup 4 has a lower shaft hole 13 therein, a second bearing step is provided at a lower end of the lower shaft hole 13, a lower bearing 42 is provided at the second bearing step, and a lower end of the main shaft 41 is disposed through the lower shaft hole via a lower bearing 44. And a pressure spring 43 sleeved on the main shaft 41 is arranged between the lower bearing 42 and the inner grinding core 32.

Wherein, the inner side of the adjusting ring 2 is provided with a fixing hole 23, and the upper end of the limiting part 26 is detachably assembled and connected with the fixing hole 23. For example, the fixing hole 23 is a screw hole, and the stopper 26 is a screw. When the bean grinder is assembled, firstly screwing the adjusting ring 2 to the outer side of the upper part of the grinding cup 1, when the adjusting ring 2 and the grinding cup 1 are screwed to the position where at least one circle of grinding cup is left, penetrating the mounting inner grinding core 32 from the bottom of the grinding cup 1 by using a tool and then penetrating into the grinding cup 1, and fixing the limiting part 26 in the fixing hole 23 of the adjusting ring 2; then, after the inner grinding core 32 is passed through the lower end of the main shaft 41, the lower end of the main shaft 41 is tightly fitted with the inner grinding core 32 by using the locking member 45.

Of course, a detachably connected powder cup 5 may be further provided at the bottom of the grinding cup 1, and ground coffee powder may fall into the powder cup 5 when coffee beans are ground by the bean grinder.

Furthermore, the bean grinder further comprises a driving mechanism fixedly connected with the main shaft 41, and the driving mechanism is used for driving the main shaft 41 to rotate, so as to drive the inner grinding core 32 to rotate relative to the outer grinding disc 31, and coffee beans in the gap between the inner grinding core 32 and the outer grinding disc 31 are ground. The driving mechanism can be a motor or a manual mechanism.

For example, the figures show a manual mechanism comprising a connector 61 fixedly connected to the upper end of the spindle 41 and a handle 62 detachably connected to the connector 61. When the handle 62 is turned, the spindle 41 is rotated by the connector 61. The manual mechanism further comprises a cover plate 63 sleeved at the lower end of the connector 61.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (7)

1. A bean grinder with the gear precisely adjusted from an outer ring comprises a grinding cup (1), an outer grinding disc (31) arranged in the grinding cup (1), an inner grinding core (32) matched with the outer grinding disc (31) and a main shaft (41) with the lower tail end fixedly connected with the inner grinding core (32); the method is characterized in that:

an adjusting ring (2) is screwed on the outer ring thread at the upper end of the grinding cup (1), a gear indication mark is arranged on the outer surface of the adjusting ring (2), an upper shaft hole (22) is formed in the adjusting ring (2), an upper bearing (44) is arranged in the upper shaft hole (22), the upper tail end of a main shaft (41) penetrates through the upper shaft hole (22) through the upper bearing (44), and the main shaft (41) is abutted to the upper end face of an inner ring of the upper bearing (44) through a retaining ring (46);

a limiting part (26) is arranged in the adjusting ring (2), and a stop rib (12) capable of stopping the limiting part (26) is arranged on the inner wall of the grinding cup (1);

a plurality of gear grooves (25) are uniformly distributed on the circumference of the inner side of the adjusting ring (2), and a gear mechanism matched with the gear grooves (25) is arranged at the upper tail end of the grinding cup (1).

2. The bean grinder according to claim 1, characterized in that the outer side of the upper end of the grinding cup (1) is provided with an external thread (11), the inner side of the adjusting ring (2) is correspondingly provided with an internal thread (27), the thread space between the internal thread (27) and the external thread (11) is 1.5-2.5 mm, and the internal thread (27) is connected with the external thread (11) in a threaded manner.

3. Bean grinder as in claim 2, characterized in that the adjusting ring (2) has a straight shank (28) without thread between its bottom end and the internal thread (27).

4. The bean grinder according to claim 1, characterized in that the gear indication marks are uniformly marked with gear information, and the position of each gear information corresponds to the position of the gear groove (25).

5. The bean grinder according to claim 1, characterized in that the lower end of the adjusting ring (2) is a chamfered lower portion (24) provided with a chamfer, and the gear indicator is provided on the circumferential surface of the chamfered lower portion (24).

6. A bean grinder as claimed in claim 1, characterized in that the indexing mechanism comprises a limiting hole provided in the grinding cup (1), an elastic member (71) provided in the limiting hole, and a limiting bead (72) connected to the elastic member (71), and the limiting bead (72) is partially exposed out of the limiting hole and is limited in one of the indexing grooves (25).

7. A bean grinder as claimed in claim 1, characterised in that the stop ring (46) is secured to the main shaft (41) by double nut interlocking, welding, gluing with screw threads or side locking screws.

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