CN116899691B

CN116899691B - Cereal reducing mechanism

Info

Publication number: CN116899691B
Application number: CN202311161687.2A
Authority: CN
Inventors: 姜世明; 李英治; 李静; 司鹏; 吕本丰; 武耀威; 吕本凯; 周一
Original assignee: Shandong Double Win Unity Agricultural Machinery Technology Co ltd
Current assignee: Shandong Double Win Unity Agricultural Machinery Technology Co ltd
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2024-01-19
Anticipated expiration: 2043-09-11
Also published as: CN116899691A

Abstract

The invention relates to the technical field of grain crushing, and provides a grain crushing device, which comprises a barrel, a hopper arranged above the barrel, a crushing assembly arranged in the barrel, and supporting legs arranged below the barrel, wherein the crushing assembly comprises a first crushing piece, a second crushing piece, a third crushing piece, a first driving assembly, a second driving assembly and a transmission assembly; the first driving assembly can drive the first crushing member and the third crushing member to be far away from or close to each other so as to change the distance between the first crushing member and the second crushing member and the distance between the second crushing member and the third crushing member; the second driving component can drive the first crushing piece to rotate; the transmission assembly is arranged between the first crushing member and the second crushing member, the rotation of the first crushing member drives the transmission assembly to operate, the second crushing member rotates under the action of the transmission assembly, and the rotation direction of the second crushing member is opposite to that of the first crushing member.

Description

Cereal reducing mechanism

Technical Field

The invention relates to the technical field of grain crushing, in particular to a grain crushing device.

Background

The cereal milling device is capable of milling and grinding larger grain to produce the desired smaller grain particles or powders, especially for coarse cereals. The prior grain crushing device grinds and crushes the grains such as wheat, rice, corn and the like into corresponding grain powder so as to be convenient for people with weak intestines and stomach to eat, digest and absorb, and the grain powder formed after crushing can be also made into various foods. However, the conventional grain crushing device has the defects that only one grain can be crushed by the same machine type, and the grain crushing granularity cannot be controlled.

Disclosure of Invention

In view of the above, the present invention provides a grain crushing apparatus that solves or at least alleviates the above problems to some extent, so as to enable the same apparatus to be adapted to a plurality of grains, and to be able to adjust the grain size of the crushing of the grains as required.

The invention provides a grain crushing device, which comprises a barrel, a hopper arranged above the barrel, a crushing assembly arranged in the barrel, and a supporting leg arranged below the barrel, wherein the crushing assembly comprises a first crushing piece, a second crushing piece, a third crushing piece, a first driving assembly, a second driving assembly and a transmission assembly; the first crushing piece, the second crushing piece and the third crushing piece are sequentially arranged from inside to outside along the radial direction of the cylinder body, and the first driving assembly can drive the first crushing piece and the third crushing piece to be far away from or close to each other so as to change the distance between the first crushing piece and the second crushing piece and the distance between the second crushing piece and the third crushing piece; the second driving component can drive the first crushing piece to rotate; the transmission assembly is arranged between the first crushing part and the second crushing part, the rotation of the first crushing part drives the transmission assembly to operate, the second crushing part rotates under the action of the transmission assembly, and the rotation direction of the second crushing part is opposite to that of the first crushing part.

In some embodiments, the first shredder includes a first bracket and a first shredder body rotatably supported on the first bracket; the first crushing part body is columnar, and the diameter of the first crushing part body is gradually increased from top to bottom.

In some embodiments, the first bracket includes a first mounting ring disposed on an inner side, a second mounting ring disposed on an outer side, a first rib disposed between the first and second mounting rings, and a plurality of first pushers disposed on an outer side of the second mounting ring and extending radially outward therefrom.

In some embodiments, the second shredder includes a second bracket, and a second shredder body rotatably supported on the second bracket; the second crushing part body is hollow columnar, and the inner diameter and the outer diameter of the second crushing part body are gradually increased from top to bottom, wherein the change of the inner diameter corresponds to the change of the diameter of the first crushing part body.

In some embodiments, the second bracket includes an inner ring disposed on an inner side, an outer ring disposed on an outer side, a second rib disposed between the inner ring and the outer ring, and a support ring disposed on an upper side of the inner ring; the lower end of the inner ring is provided with a plurality of first notches with downward openings, and the lower end of the outer ring is provided with a plurality of second notches with downward openings; the second mounting ring of the first bracket is positioned on the inner side of the inner ring, and the first push rod of the first bracket passes through the first notch of the inner ring and the second notch of the outer ring and extends out of the cylinder body.

In some embodiments, the third pulverizing member includes a third pulverizing member body movably mounted inside the cylinder, and a plurality of second push rods mounted on an underside of the third pulverizing member body; the third crushing part body is in a hollow column shape, the inner diameter of the third crushing part body gradually increases from top to bottom, and the outer side of the third crushing part body is connected in the inner side of the cylinder; the second push rod extends along the radial direction of the cylinder body and protrudes out of the cylinder body.

In some embodiments, the barrel is provided with a first opening penetrating through the barrel wall at a position corresponding to the second push rod; the cylinder body is provided with a second opening penetrating through the wall part of the cylinder body at a position corresponding to the first push rod; the first push rod can move up and down along the axial direction of the cylinder in the second opening; the second push rod can move up and down in the first opening along the axial direction of the cylinder body.

In some embodiments, the first driving assembly drives the first pulverizing member and the third pulverizing member away from or toward each other by the first push rod and the second push rod, respectively; the first driving assembly comprises a first fixed ring fixed on the outer side of the cylinder, a second fixed ring positioned below the first fixed ring and fixed on the outer side of the cylinder, a first motor arranged on the outer side of the cylinder, a first driving piece arranged on an output shaft of the first motor, a first transmission piece rotatably arranged in the first fixed ring, a first driven piece driven by the first transmission piece and a screw rod driven by the first driven piece; the screw is provided with a first thread at a position adjacent to the first fixing ring, and is provided with a second thread at a position adjacent to the second fixing ring, and the thread directions of the first thread and the second thread are opposite; the end part of the first push rod protruding out of the cylinder body is provided with a first threaded hole which is jointed with the second thread; the second push rod protrudes out of the end part of the cylinder body and is provided with a second threaded hole which is jointed with the first thread.

In some embodiments, the plurality of second push rods protrude from the end of the cylinder body and are connected by a first connecting ring, and the plurality of first push rods protrude from the end of the cylinder body and are connected by a second connecting ring; the second driving assembly comprises a second motor arranged on the second connecting ring, a second driving piece arranged on an output shaft of the second motor, a second driven piece arranged on a driving shaft of the first crushing piece, and a second transmission piece connected between the second driving piece and the second driven piece.

In some embodiments, the transmission assembly includes a first gear mounted on the drive shaft, a second gear engaged with the first gear, and a gear ring secured below the second shredder body.

Compared with the prior art, the invention has at least the following beneficial effects:

1. the grain crushing device provided by the invention can realize that the same device is suitable for different crushing requirements of various grains, and the grain crushing granularity can be adjusted according to the needs.

2. According to the grain crushing device, the first crushing piece and the third crushing piece which can move according to the requirement are used for adjusting the radial distance between the first crushing piece and the second crushing piece and the radial distance between the second crushing piece and the third crushing piece along the cylinder, so that the requirements of different grain crushing granularity are met, and the crushing efficiency is improved; and for different crushing requirements, the crushing piece does not need to be replaced, so that the cost is reduced.

3. The rotation direction of the second crushing member is opposite to that of the first crushing member, so that the crushing efficiency is greatly improved.

4. The diameter of the first crushing body gradually increases from top to bottom, the inner diameter and the outer diameter of the second crushing body gradually increase from top to bottom, and the inner diameter of the third crushing body gradually increases from top to bottom, so that the size of the opposite surface of the corresponding crushing body increases, and the crushing efficiency is improved.

Drawings

Fig. 1 shows a perspective view of a cereal milling device according to an embodiment of the invention.

Fig. 2 shows a perspective view of the cereal milling device of fig. 1 in another direction.

Fig. 3 shows an exploded view of the cereal milling device shown in fig. 1.

Fig. 4 shows a perspective view of the comminution assembly of the cereal comminution apparatus shown in fig. 3.

Fig. 5 illustrates an exploded view of the shredder assembly illustrated in fig. 4.

Fig. 6 shows a perspective view of a portion of the components of the shredder assembly of fig. 4.

Fig. 7 shows an exploded view of a portion of the components of the shredder assembly shown in fig. 6.

Fig. 8 shows an exploded view in another orientation of a portion of the components of the shredder assembly shown in fig. 6.

Fig. 9 shows a top view of the cereal milling device shown in fig. 1.

Fig. 10 shows a cross-sectional view along line A-A in fig. 9.

Reference numerals illustrate: 1-a cylinder; 11-end caps; 111-a feed inlet; 12-a discharge end; 13-a first opening; 14-a second opening; 2-a hopper; 3-a crushing assembly; 31-a first pulverizing member; 311-a first shredder body; 312-a first bracket; 313-a first mounting ring; 314-a second mounting ring; 315-first ribs; 316—first push rod; 317-drive shaft; 32-a second pulverizing member; 321-a second shredder body; 322-a second scaffold; 323-an inner ring; 231-first gap; 324-outer ring; 241-second notch; 325-a second rib; 326-a support ring; 33-a third pulverizing member; 331-a third shredder body; 332-a second pushrod; 333-inclined plane; 34-a first connection ring; 35-a second connecting ring; 351—a mount; 352-slide rail; 36-a first drive assembly; 361-a first securing ring; 362-a second securing ring; 363-a first motor; 364-first driver; 365-first transmission member; 366—a first follower; 367-a screw; 37-a second drive assembly; 371-a second motor; 372-a second driver; 373-a second transmission member; 374-a second follower; 38-a transmission assembly; 381—a first gear; 382-a second gear; 383-ring gear; 4-a stirring assembly; 40-a third drive assembly; 401-a third motor; 402-a third driver; 403-third transmission member; 404-a third follower; 41-a first fixing member; 42-a second fixing member; 43-rotating shaft; 44-stirring piece; 5-supporting legs.

Detailed Description

The invention will be further described with reference to the drawings and the specific embodiments.

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

In the present invention, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", etc. refer to an orientation or a positional relationship based on that shown in the drawings, and are merely relational terms, which are used for convenience in describing structural relationships of various components or elements of the present invention, and do not denote any one of the components or elements of the present invention, and are not to be construed as limiting the present invention.

In the present invention, terms such as "fixedly attached," "connected," "coupled," and the like are to be construed broadly and refer to either a fixed connection or an integral or removable connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the present invention can be determined according to circumstances by a person skilled in the relevant art or the art, and is not to be construed as limiting the present invention.

As shown in fig. 1 to 3, the grain crushing apparatus of an embodiment of the present invention includes a drum 1, a hopper 2 installed above the drum 1, a crushing assembly 3 provided inside the drum 1, and a leg 5 installed below the drum 1. In the present embodiment, the hopper 2 may be constructed as is known in the art, and will not be described in detail herein. The cylinder 1 is a substantially hollow cylinder. An end cover 11 is arranged at the upper end of the cylinder body 1, and a discharge end 12 is arranged at the lower end of the cylinder body 1, wherein the diameter of the discharge end 12 gradually decreases from the lower end of the cylinder body 1 along the axial direction of the cylinder body 1. The center of the end cap 11 is provided with a feed inlet 111 through which grain from the hopper 2 enters the interior of the bowl 1 and is then crushed by the crushing assembly 3 into particles or powder of a desired size.

In this embodiment, the pulverizing assembly 3 includes a first pulverizing member 31, a second pulverizing member 32, a third pulverizing member 33, a first driving assembly 36, a second driving assembly 37, and a transmission assembly 38. Referring to fig. 3 to 6, the first pulverizing member 31, the second pulverizing member 32, and the third pulverizing member 33 are sequentially disposed from inside to outside in the radial direction of the cylinder 1, that is, in the radial direction of the cylinder 1, with the second pulverizing member 32 interposed between the first pulverizing member 31 and the third pulverizing member 33. The first driving assembly 36 can drive the first pulverizing member 31 and the third pulverizing member 33 away from or close to each other to change the distance between the first pulverizing member 31 and the second pulverizing member 32 and the distance between the second pulverizing member 32 and the third pulverizing member 33, so that different pulverizing demands can be satisfied. The second driving assembly 37 can drive the first pulverizing member 31 to rotate. The transmission assembly 38 is arranged between the first crushing member 31 and the second crushing member 32, the rotation of the first crushing member 31 drives the transmission assembly 38 to operate, and the second crushing member 32 rotates under the action of the transmission assembly 38, wherein the rotation direction of the first crushing member 31 is opposite to the rotation direction of the second crushing member 32.

Referring to fig. 5, 7 and 8, the first pulverizing member 31 includes a first bracket 312, and a first pulverizing member body 311 rotatably supported on the first bracket 312. Referring to fig. 9 and 10, the first pulverizing member body 311 has a substantially cylindrical shape, and the diameter thereof increases gradually from top to bottom, i.e., the diameter of the upper end of the first pulverizing member body 311 is smaller than the diameter of the lower end thereof. The tip of the first pulverizing member body 311 is provided as an inverted V-shaped projection extending upward. The first bracket 312 includes a first mounting ring 313 disposed on the inside, a second mounting ring 314 disposed on the outside, a first rib 315 disposed between the first mounting ring 313 and the second mounting ring 314, and a plurality of first push rods 316 disposed on the outside of the second mounting ring 314 and extending radially outwardly therefrom. The lower end of the first pulverizing member body 311 is provided with a driving shaft 317 extending downward in the axial direction thereof. The driving shaft 317 passes through the first mounting ring 313 and rotatably supports the first pulverizing member body 311 on the first bracket 312 in cooperation with a bearing provided in the first mounting ring 313.

The second pulverizing member 32 includes a second bracket 322, and a second pulverizing member body 321 rotatably supported on the second bracket 322. The second pulverizing member body 321 is generally hollow and cylindrical, and has an inner diameter and an outer diameter that gradually increase from top to bottom, wherein the change of the inner diameter corresponds to the change of the diameter of the first pulverizing member body 311. The tip of the second pulverizing member body 321 is provided as an inverted V-shaped projection extending upward. The second bracket 322 includes an inner ring 323 disposed inside, an outer ring 324 disposed outside, a second rib 325 disposed between the inner ring 323 and the outer ring 324, and a support ring 326 disposed at an upper side of the inner ring 323. The lower end of the inner ring 323 is provided with a plurality of first notches 231 with downward openings, and the lower end of the outer ring 324 is provided with a plurality of second notches 241 with downward openings. The number of the first notches 231 and the second notches 241 is equal to the number of the first push rods 316 of the first bracket 312. Preferably, this embodiment is provided with 4 first pushers 316. Also preferably, the 4 first pushers 316 are evenly distributed along the circumference of the second mounting ring 314. The second mounting ring 314 of the first bracket 312 is located inside the inner ring 323, and the first push rod 316 of the first bracket 312 passes through the first notch 231 of the inner ring 323 and the second notch 241 of the outer ring 324, wherein the first push rod 316 extends out of the cylinder 1. The first push rod 316 is movable in the axial direction of the cylinder 1 with respect to the first notch 231 and the second notch 241.

The third pulverizing member 33 includes a third pulverizing member body 331 movably installed inside the cylinder 1, and a plurality of second push rods 332 installed at the lower side of the third pulverizing member body 331. The third crushing member body 331 has a substantially hollow columnar shape with an inner diameter gradually increasing from top to bottom, and an outer side of the third crushing member body 331 is engaged in an inner side of the cylinder 1. The top end of the third pulverizing member body 331 is provided as a slope 333 inclined from the inner side of the cylinder 1 toward the second pulverizing member body 321. The inverted V-shaped protrusion of the first pulverizing member body 311, the inverted V-shaped protrusion of the second pulverizing member body 321, and the inclined surface 333 of the third pulverizing member body 331 can facilitate the entry of grains into the gap between the first pulverizing member body 311 and the second pulverizing member body 321, and the gap between the second pulverizing member body 321 and the third pulverizing member body 331.

The second push rod 332 extends in the radial direction of the cylinder 1 and protrudes from the cylinder 1. The number of the plurality of second pushers 332 is equal to the number of the plurality of first pushers 316. Preferably, the ends of the plurality of second push rods 332 protruding from the cylinder 1 are connected by the first connection ring 34. The ends of the plurality of first push rods 316 protruding from the cylinder 1 are connected by the second connection ring 35. The cylinder 1 is provided with a first opening 13 penetrating through the wall part of the cylinder 1 at a position corresponding to the second push rod 332; the cylinder 1 is provided with a second opening 14 penetrating through the wall of the cylinder 1 at a position corresponding to the first push rod 316. The first push rod 316 is movable up and down in the second opening 14 in the axial direction of the cylinder 1. The second push rod 332 is movable up and down in the first opening 13 in the axial direction of the cylinder 1. The first driving assembly 36 drives the first pulverizing member 31 and the third pulverizing member 33 to move away from or toward each other by the first push rod 316 and the second push rod 332, respectively.

Referring to fig. 3 and 5 together, the first driving assembly 36 includes a first fixed ring 361 fixed to the outside of the cylinder 1, a second fixed ring 362 positioned below the first fixed ring 361 and fixed to the outside of the cylinder 1, a first motor 363 mounted to the outside of the cylinder 1, a first driving member 364 mounted to an output shaft of the first motor 363, a first driving member 365 rotatably mounted in the first fixed ring 361, a first driven member 366 driven by the first driving member 365, and a screw 367 driven by the first driven member 366, wherein both ends of the screw 367 are rotatably supported between the first fixed ring 361 and the second fixed ring 362 through bearings. The number of screws 367 is equal to the number of first pushers 316. Screw 367 is provided with a first thread adjacent first retaining ring 361 and a second thread adjacent second retaining ring 362, the first and second threads being oppositely threaded. Preferably, the pitch of the first thread and the pitch of the second thread are equal. The end of the first push rod 316 protruding from the cylinder 1 is provided with a first threaded hole in which the second thread of the screw 367 can be engaged; the end of the second push rod 332 protruding from the barrel 1 is provided with a second threaded hole in which the first thread of the screw 367 can be engaged. Preferably, the first motor 363 is a stepper motor. The first driver 364 and the first follower 366 are gears and the first driver 365 is a ring gear. The upper end of the first fixing ring 361 is provided with a fixing groove in which the first transmission member 365 is rotatably engaged. When the distance between the first crushing member body 311 and the second crushing member body 321 and the distance between the second crushing member body 321 and the third crushing member body 331 need to be adjusted, the first motor 363 drives the first driving member 364 to rotate, the rotation of the first driving member 364 drives the first driven member 366 to rotate through the first transmission member 365, the rotation of the first driven member 366 drives the screw 367 to rotate, and the screw 367 drives the third crushing member 33 and the first crushing member 31 to face each other or away from each other through the cooperation of the first thread and the second threaded hole of the second push rod 332 and the cooperation of the second thread and the first threaded hole of the first push rod 316, so that the distance between the first crushing member body 311 and the second crushing member body 321 and the distance between the second crushing member body 321 and the third crushing member body 331 are adjusted.

After the distance between the first crushing member body 311 and the second crushing member body 321 and the distance between the second crushing member body 321 and the third crushing member body 331 are adjusted by the first driving assembly 36, the first crushing member body 311 and the second crushing member body 321 are driven to operate by the second driving assembly 37, so that the grains are crushed and ground.

The second driving assembly 37 includes a second motor 371 mounted on the second connection ring 35, a second driving member 372 mounted on an output shaft of the second motor 371, a second driven member 374 mounted on the driving shaft 317 of the first pulverizing member 31, and a second transmission member 373 connected between the second driving member 372 and the second driven member 374. The second connection ring 35 is provided with a mounting seat 351 for mounting the second motor 371 between two adjacent first push rods 316. The cylinder 1 is fixed with a slide rail 352 at a position corresponding to the mounting seat 351. The mounting seat 351 is slidably engaged on the slide rail 352. Preferably, the second driving member 372 and the second driven member 374 are gears, and the second transmission member 373 is a chain. The second motor 371 operates to drive the second driving member 372 to rotate, and the second driving member 372 drives the second driven member 374 to rotate through the second transmission member 373, so as to drive the driving shaft 317 to rotate, thereby rotating the first crushing member 31; and along with the rotation of the first crushing member 31, the second crushing member 32 is driven by the transmission assembly 38 to rotate in a rotation direction opposite to the rotation direction of the first crushing member 31.

Referring also to fig. 4-8, the transmission assembly 38 includes a first gear 381 mounted on the drive shaft 317, a second gear 382 engaged with the first gear 381, and a ring gear 383 fixed under the second shredder body 321. The first gear 381 is located between the first pulverizing member body 311 and the first bracket 312. The second gear 382 is rotatably mounted on the first rib 315 of the first pulverizing member 31. The ring gear 383 is rotatably engaged in the support ring 326 of the second pulverizing member 32. Preferably, the outer side of the gear ring 383 is provided with a ring groove extending along the circumferential direction thereof, the inner side of the supporting ring 326 is provided with an annular protrusion extending along the circumferential direction thereof, the annular protrusion is engaged in the ring groove of the gear ring 383, the driving shaft 317 drives the first gear 381 to rotate, the first gear 381 drives the second gear 382 to rotate, and the second gear 382 drives the gear ring 383 to rotate, thereby driving the second crushing body 321 to rotate.

In use, a user can control the first driving component 36 to adjust the distance between the first crushing member body 311 and the second crushing member body 321 and the distance between the second crushing member body 321 and the third crushing member body 331 through the control device (through which the distance between the corresponding crushing member bodies and the operation parameters of the corresponding motors can be set), wherein the first motor 363 drives the first driving member 364 to rotate, the rotation of the first driving member 364 drives the first follower 366 to rotate through the first transmission member 365, the rotation of the first follower 366 drives the screw 367 to rotate, and the screw 367 drives the third crushing member 33 to face or depart from the first crushing member body 321 and the distance between the second crushing member body 321 and the third crushing member body 331 through the cooperation of the first screw with the second screw hole of the second push rod 332 and the cooperation of the second screw with the first screw hole of the first push rod 316; after the distance between the first crushing member body 311 and the second crushing member body 321 and the distance between the second crushing member body 321 and the third crushing member body 331 are adjusted, the first crushing member body 311 and the second crushing member body 321 are driven to operate by the second driving assembly 37 to crush and crush grains, specifically, the second motor 371 is operated to drive the second driving member 372 to rotate, and the second driving member 372 drives the second driven member 374 to rotate by the second driving member 373 so as to drive the driving shaft 317 to rotate, thereby enabling the first crushing member 31 to rotate; with the rotation of the first pulverizing member 31, the second pulverizing member 32 is rotated in a rotation direction opposite to the rotation direction of the first pulverizing member 31 by the driving of the driving assembly 38, so that grains can be pulverized and ground between the first pulverizing member body 311 and the second pulverizing member body 321, and between the second pulverizing member body 321 and the third pulverizing member body 331, thereby being made into particles or powder of a desired particle size. Preferably, the pulverizing surfaces of the first pulverizing member body 311, the second pulverizing member body 321, and the third pulverizing member body 331 are provided with a pattern.

Returning to fig. 1 to 3, the grain crushing apparatus further includes a stirring assembly 4 provided in the drum 1, by which stirring assembly 4 various grains can be sufficiently mixed. The stirring assembly 4 is positioned between the end cap 11 of the barrel 1 and the pulverizing assembly 3. The agitating assembly 4 includes a third driving assembly 40, a first fixing member 41 installed inside the drum 1 adjacent to the end cap 11, a second fixing member 42 installed inside the drum 1 adjacent to the pulverizing assembly 3, a rotation shaft 43 rotatably supported between the first fixing member 41 and the second fixing member 42, and a plurality of agitating members 44 provided on the rotation shaft 43. The third driving assembly 40 includes a third motor 401 disposed outside the cylinder 1, a third driving member 402 mounted on an output shaft of the third motor 401, a third driven member 404 mounted on the rotating shaft 43, and a third transmission member 403 connected to the third driving member 402 and the third driven member 404. The grains (especially the mixture of various grains) from the hopper 2 are crushed and ground at the crushing unit 3 after being stirred by the stirring unit 4 to be thoroughly mixed.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The grain crushing device comprises a barrel, a hopper arranged above the barrel, a crushing assembly arranged inside the barrel and a supporting leg arranged below the barrel, and is characterized in that the crushing assembly comprises a first crushing piece, a second crushing piece, a third crushing piece, a first driving assembly, a second driving assembly and a transmission assembly; the first crushing piece, the second crushing piece and the third crushing piece are sequentially arranged from inside to outside along the radial direction of the cylinder body, and the first driving assembly can drive the first crushing piece and the third crushing piece to be far away from or close to each other so as to change the distance between the first crushing piece and the second crushing piece and the distance between the second crushing piece and the third crushing piece; the second driving component can drive the first crushing piece to rotate; the transmission assembly is arranged between the first crushing part and the second crushing part, the rotation of the first crushing part drives the transmission assembly to operate, the second crushing part rotates under the action of the transmission assembly, and the rotation direction of the second crushing part is opposite to that of the first crushing part; the first crushing member comprises a first bracket and a first crushing member body rotatably supported on the first bracket; the first crushing part body is columnar, and the diameter of the first crushing part body gradually increases from top to bottom; the first bracket comprises a first mounting ring arranged on the inner side, a second mounting ring arranged on the outer side, a first rib arranged between the first mounting ring and the second mounting ring, and a plurality of first push rods arranged on the outer side of the second mounting ring and extending outwards along the radial direction of the second push rods; the second crushing member comprises a second bracket and a second crushing member body rotatably supported on the second bracket; the second crushing part body is in a hollow column shape, and the inner diameter and the outer diameter of the second crushing part body are gradually increased from top to bottom, wherein the change of the inner diameter corresponds to the change of the diameter of the first crushing part body; the third crushing member comprises a third crushing member body movably mounted on the inner side of the cylinder body, and a plurality of second push rods mounted on the lower side of the third crushing member body; the third crushing part body is in a hollow column shape, the inner diameter of the third crushing part body gradually increases from top to bottom, and the outer side of the third crushing part body is connected in the inner side of the cylinder; the second push rod extends along the radial direction of the cylinder body and protrudes out of the cylinder body; the first driving component drives the first crushing piece and the third crushing piece to be far away from or close to each other through the first push rod and the second push rod respectively; the first driving assembly comprises a first fixed ring fixed on the outer side of the cylinder body, a second fixed ring which is positioned below the first fixed ring and fixed on the outer side of the cylinder body, a first motor arranged on the outer side of the cylinder body, a first driving piece arranged on an output shaft of the first motor, a first transmission piece rotatably arranged in the first fixed ring, a first driven piece driven by the first transmission piece and a screw rod driven by the first driven piece.

2. The grain crushing apparatus according to claim 1, wherein the second bracket includes an inner ring provided on an inner side, an outer ring provided on an outer side, a second rib provided between the inner ring and the outer ring, and a support ring provided on an upper side of the inner ring; the lower end of the inner ring is provided with a plurality of first notches with downward openings, and the lower end of the outer ring is provided with a plurality of second notches with downward openings; the second mounting ring of the first bracket is positioned on the inner side of the inner ring, and the first push rod of the first bracket passes through the first notch of the inner ring and the second notch of the outer ring and extends out of the cylinder body.

3. The cereal milling device of claim 2, wherein the barrel is provided with a first opening through the barrel wall at a location corresponding to the second push rod; the cylinder body is provided with a second opening penetrating through the wall part of the cylinder body at a position corresponding to the first push rod; the first push rod can move up and down along the axial direction of the cylinder in the second opening; the second push rod can move up and down in the first opening along the axial direction of the cylinder body.

4. A cereal milling device according to claim 3, wherein the screw is provided with a first thread adjacent the first stationary ring and a second thread adjacent the second stationary ring, the first and second threads having opposite thread directions; the end part of the first push rod protruding out of the cylinder body is provided with a first threaded hole which is jointed with the second thread; the second push rod protrudes out of the end part of the cylinder body and is provided with a second threaded hole which is jointed with the first thread.

5. A cereal milling device according to claim 3, wherein a plurality of second push rods protrude from the end of the cylinder body and are connected by a first connecting ring, and a plurality of first push rods protrude from the end of the cylinder body and are connected by a second connecting ring; the second driving assembly comprises a second motor arranged on the second connecting ring, a second driving piece arranged on an output shaft of the second motor, a second driven piece arranged on a driving shaft of the first crushing piece, and a second transmission piece connected between the second driving piece and the second driven piece.

6. The cereal milling apparatus of claim 5, wherein the transmission assembly comprises a first gear mounted on the drive shaft, a second gear engaged with the first gear, and a gear ring secured below the second mill body.