CN107396699A - Small-sized corn thresher - Google Patents

Small-sized corn thresher Download PDF

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Publication number
CN107396699A
CN107396699A CN201710742483.6A CN201710742483A CN107396699A CN 107396699 A CN107396699 A CN 107396699A CN 201710742483 A CN201710742483 A CN 201710742483A CN 107396699 A CN107396699 A CN 107396699A
Authority
CN
China
Prior art keywords
threshing
plate group
pieces
feeding
core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710742483.6A
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Chinese (zh)
Inventor
李卫民
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taizhou Polytechnic College
Original Assignee
Taizhou Polytechnic College
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taizhou Polytechnic College filed Critical Taizhou Polytechnic College
Priority to CN201710742483.6A priority Critical patent/CN107396699A/en
Publication of CN107396699A publication Critical patent/CN107396699A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01FPROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F11/00Threshing apparatus specially adapted for maize; Threshing apparatus specially adapted for particular crops other than cereals
    • A01F11/06Threshing apparatus specially adapted for maize; Threshing apparatus specially adapted for particular crops other than cereals for maize, e.g. removing kernels from cobs
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01FPROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00Parts or details of threshing apparatus
    • A01F12/18Threshing devices
    • A01F12/22Threshing cylinders with teeth
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01FPROCESSING OF HARVESTED PRODUCE; HAY OR STRAW PRESSES; DEVICES FOR STORING AGRICULTURAL OR HORTICULTURAL PRODUCE
    • A01F12/00Parts or details of threshing apparatus
    • A01F12/18Threshing devices
    • A01F2012/188Rethreshing devices

Abstract

The invention discloses small-sized corn thresher; thresing machine includes pan feeding part, threshing part, screen fraction, output section and rack section; three parts are included in rack section; it is followed successively by feeding warehouse, threshing bin and goes out core storehouse; feeding warehouse, threshing bin and go out to set threshing mechanism in the three of core storehouse, integrally insertion sets the sorting mechanism of rounded distribution in three;Pan feeding part is arranged on rack section upper end, and adjustable order feeding machine structure is provided with pan feeding part, and rotary auxiliary is provided with output section and dials core mechanism;Threshing part includes two-stage separating mechanism, and threshing bin is divided into two-stage separating mechanism by dividing plate, and the two opposite sides of threshing bin are equipped with grating type notch board layer;The thresing machine can carry out secondary threshing, can be completely secured corn ear whole through threshing, threshing performance is high; plug breakage rate is small, and it is fast to feed orderly and efficiency high, discharging speed; thresing machine long-time steady operation is able to ensure that, reduces the fault rate of machine in threshing course.

Description

Small-sized corn thresher
Technical field
The present invention relates to small-sized corn thresher.
Background technology
The amount of China's maize planting has much, and China current one shares three corn-growing regions, and main is exactly to plant jade Meter Wei Zhu.So development mechanization threshing, uses and promote maize sheller, corn threshing efficiency is improved, to solving and mitigating The burden of peasant has very great help.In some more poor areas, also have and corn is much carried out directly by the way of artificial Threshing;It is existing using it is commonplace be exactly machinery maize sheller, main threshing mode is that threshing is former in other words Reason can be divided into four at present, be respectively(1)Curry principle;(2)Hit principle;(3)Rubbing or rubbing principle;(4)Roll original Reason;But the maize sheller used in China, have that threshing performance is low, and the broken core of corn is more, depart from inefficient, powder feeding efficiency It is low and unordered, fed material from being blocked is easily caused, discharging speed is slow, the defects of also easily blocking.
The content of the invention
For above-mentioned problem, the present invention is intended to provide small-sized corn thresher, the thresing machine can carry out secondary de- Grain, can so be completely secured corn ear whole through threshing, threshing performance is high, and plug breakage rate is small, and feed in order and Efficiency high, discharging speed are fast, it can be ensured that thresing machine long-time steady operation, reduce the fault rate of machine in threshing course.
To achieve these goals, the technical solution adopted in the present invention is as follows:
Small-sized corn thresher, the thresing machine include pan feeding part, threshing part, screen fraction, output section and frame Part, the rack section is interior to include three parts, is followed successively by feeding warehouse, threshing bin and goes out core storehouse, in the feeding warehouse, threshing Storehouse and go out in the three of core storehouse lateral direction penetrating connection threshing mechanism, and in the feeding warehouse, threshing bin and go out in core storehouse One insertion sets the sorting mechanism of rounded distribution, and the threshing mechanism is located in the sorting mechanism, in the sieve The bottom of mechanism is selected to be additionally provided with screen cloth;The pan feeding part is arranged on the rack section upper end, and is located at the threshing part Charging aperture upper end, adjustable order feeding machine structure is provided with the pan feeding part, rotary auxiliary is provided with the output section Dial core mechanism;The threshing part includes two-stage separating mechanism, and the threshing bin is divided into the two-stage separating mechanism by dividing plate, The two opposite sides of the threshing bin are equipped with grating type notch board layer.
Preferably, the threshing mechanism is connected by the transport mechanism being arranged on rack section, and the rotation It is a threshing axle to turn separating mechanism, in the threshing axle along feedstock direction set gradually feed auger piece group, threshing tooth group with And row's core plate group.
Preferably, the threshing tooth group includes coronal the flat board tooth and flat board tooth being staggered.
Preferably, the sorting mechanism includes some cylinders, some cylinders are angularly distributed in 360 degree, are located at The cylinder distribution shape of the pan feeding part and output section is 3/4ths of circle, and the cylinder positioned at the threshing part is distributed It is shaped as round half.
Preferably, the pan feeding part includes feeding hopper, the adjustable order feeding machine is set in the feeding hopper Structure, the adjustable order feeding machine structure include upper adjustable plate group, vertical blanking plate group and lower adjustable plate group, the vertical blanking Plate group is vertically fixed in the feeding hopper, the upper adjustable plate group, lower adjustable plate group be respectively and movably connected to it is described it is vertical under The top and bottom of flitch group, and the upper adjustable plate group, lower adjustable plate group are respectively connected with pushing mechanism.
Preferably, the upper adjustable plate group includes two pieces of upper mobile boards, lower adjustable plate group includes two pieces of lower portable plates, and The vertical blanking plate group includes two pieces of vertical panels, the top activity with two pieces of vertical panels respectively of two pieces of upper mobile boards Connection, bottom of two pieces of lower portable plates respectively with two pieces of vertical panels is flexibly connected.
Preferably, two pieces of upper mobile board top margins are slided by sliding block with being arranged on the slide rail on the feeding hopper top Connection, the base of two pieces of lower portable plates are slidably connected also by slip with being arranged on the slide rail of the feeding hopper bottom.
Dialled preferably, the rotary auxiliary dials core mechanism including rotary shaft and the circle being located in the rotary shaft Core tooth, each core tooth of dialling is arcuate structure.
The beneficial effects of the invention are as follows:Compared with prior art, of the invention to the improvement is that, first, the present invention adopts With the threshing mode of two level, the threshing performance of such corn is high, while uses improved threshing tooth, can reduce plug after threshing Breakage rate;
Secondly, feeding part directly affects the operating efficiency of thresing machine, can also directly affect the Threshing of thresing machine, therefore this hair It is bright that pan feeding part-structure is improved, adjustable order feeding machine structure is set in feeding hopper, in the course of the work upper adjustable plate Group be synchronized with the movement with lower adjustable plate group, under the impetus of pushing mechanism, two pieces of upper mobile boards, lower portable plate realize opening and Operation is tightened up, uniform sequential blanking is realized during opening, feeding is realized during tightening up, waits to open at present Material, can so realize orderly charging, improve the operating efficiency and Threshing of thresing machine;
Again, the present invention is in order to improve the speed of corn plug discharging, therefore sets rotary auxiliary to dial core mechanism, the mechanism structure Simply, plug is outwards transferred in order by dialling core tooth during rotation, improves the speed of plug discharging, prevent discharging opening Block.
Brief description of the drawings
Fig. 1 is schematic front view of the present invention.
Fig. 2 is the left view schematic diagram when present invention is provided with adjustable order feeding machine structure, rotary auxiliary dials core mechanism.
Fig. 3 is rack section of the present invention, the axonometric drawing of threshing part.
Fig. 4 is rack section of the present invention, the schematic top plan view of threshing part.
Fig. 5 is the sectional view in A-A faces in Fig. 4.
Fig. 6 is the stereogram of threshing spindle of the present invention.
Fig. 7 is the schematic front view of threshing spindle of the present invention.
Wherein:1- motor, 2- driving pulleys, 3- feeding warehouses, 4- threshing bins, 5- go out core storehouse, 6- feed auger piece groups, 7- Driven pulley, 8- row's core plate groups, the coronal flat board teeth of 9-, 10- flat board teeth, 11- cylinders, 12- fixed beams, 13- upper mobile boards, 14- Vertical panel, portable plate under 15-, 16- threshing spindles, 17- slide rails, 18- pushing mechanisms, 19- feeding hoppers, 20- screen clothes, 21- dividing plates, Covered on 22-, 23- notch boards, 24- discharge buckets, 25- rack sections, 26- rotary shafts, 27- dials core tooth, the upper lid handles of 28-, 29- row's cores Mouthful.
Embodiment
In order that one of ordinary skill in the art is better understood on technical scheme, below in conjunction with the accompanying drawings and Embodiment is further described to technical scheme.
Referring to the drawings the small-sized corn thresher shown in 1-7, the thresing machine includes pan feeding part, threshing part, screening Partly, output section and rack section 25, the frame upper end are additionally provided with lid, upper lid handle are set on the upper lid 22 28, the first purpose of lid 22 is dust-proof and has protective effect in setting, the second is reducing noise, the bottom of frame is additionally provided with The discharge bucket 24 of taper, the iblet for threshing discharge;Three parts are included in the rack section 25, be followed successively by feeding warehouse 3, Threshing bin 4 and go out core storehouse 5, in the feeding warehouse 3, threshing bin 4 and go out lateral direction penetrating in the three of core storehouse 5 and connect threshing Mechanism, and in the feeding warehouse 3, threshing bin 4 and go out integrally to penetrate the sorting mechanism for setting rounded distribution, institute in core storehouse 5 Stating sorting mechanism includes some cylinders 11, and some cylinders 11 are angularly distributed in 360 degree, positioned at the pan feeding part and goes out The distribution shape of cylinder 11 for expecting part is 3/4ths of circle, and the distribution shape of cylinder 11 positioned at the threshing part is the two of circle / mono-, the threshing mechanism is located in the sorting mechanism, and the threshing mechanism passes through transmission mechanism transmission belt Dynamic, the transmission mechanism includes motor 1, driving pulley 2 and driven pulley 7, and the driving pulley 2 is arranged on described electronic The driving end of machine 1, the driven pulley 7 are arranged on one end of the threshing mechanism, the driving pulley 2 with it is described driven Connected between belt wheel 7 by belt, screen cloth 20 is additionally provided with the bottom of the sorting mechanism, discharge bucket 24 is located at the bottom of screen cloth 20 Portion, the half distribution cylinder 11 of threshing part circle the latter half, may so increase threshing space, pan feeding part and discharging Part is the distribution cylinder 11 of circle 3/4ths respectively, and its a quarter not being distributed is located at upper end, so can be by corn and jade In the space for the setting that rice core surrounds;The purpose of sorting mechanism among thresing machine is exactly the iblet and corn ear that will be crumpled Son is separated, and tens equally distributed cylinders 11 are angularly distributed according to 360 degree, and distribution distance is according to mapping maize cob Diameter determine, it is necessary to assure, reserve come distance can block maize cob enough, could smoothly realize the spiral shell of threshing spindle 16 Threshing is revolved, and after threshing, iblet and maize cob will not also be mixed.
The pan feeding part is arranged on the upper end of rack section 25, and is located at the charging aperture upper end of the threshing part, Adjustable order feeding machine structure is provided with the pan feeding part, rotary auxiliary is provided with the output section and dials core mechanism;It is described Threshing part includes two-stage separating mechanism, and the threshing bin 4 is divided into the two-stage separating mechanism, the threshing bin by dividing plate 21 4 two opposite sides are equipped with grating type notch board layer, and grating type notch board layer is made up of multiple notch boards 23, and notch board is arranged on fixation On beam 12, fixed beam 12 be arranged in parallel with threshing spindle 16, and the shape of notch board 23 is designed as not allowing corn to fall down also and will not connect Touch the rubbing part less than main shaft;Notch board 23 has two kinds of functions, and One function is the iblet for ensureing to depart from from corn ear It can smoothly be filtered out from gap, block corn ear, that is, equivalent to the effect for serving a sieve, second function It is exactly that, because notch board using being welded to connect, has all reserved a certain distance among round steel, can thus make corn ear It is relatively fixed in certain position, will not frightens away, ensures the efficiency of threshing, welded 54 round steel altogether on notch board, length has Three kinds, go to lay according to no position, but two-by-two before position be consistent, the diameter of round steel is unified for 16 millimeters.
In the present invention, the threshing mechanism is connected by the transport mechanism being arranged on rack section 25, And the threshing mechanism is a threshing axle, sets gradually feed auger piece group 6 along feedstock direction in the threshing axle, take off Grain tooth group and row's core plate group 8, the threshing tooth group include coronal the flat board tooth 9 and flat board tooth 10 being staggered, ensure machine What structure specifically acted on is exactly threshing board tooth, and the size of plate tooth, effect of the position all with separating mechanism does not have for shape and distribution Direct relation, threshing board tooth will have eight hats, lithographic plate teeth 10 respectively, and they are connected on a main shaft, pass through main shaft Uniform rotation, rotation is driven, extrusion friction corn, iblet is departed from.
In the present invention, the pan feeding part includes feeding hopper 19, is set in the feeding hopper 19 described adjustable orderly Feed mechanism, the adjustable order feeding machine structure includes upper adjustable plate group, vertical blanking plate group and lower adjustable plate group, described to hang down Straight blanking plate group is vertically fixed in the feeding hopper 19, and the upper adjustable plate group, lower adjustable plate group are respectively and movably connected to institute The top and bottom of vertical blanking plate group are stated, and the upper adjustable plate group, lower adjustable plate group are respectively connected with pushing mechanism 18;It is described Upper adjustable plate group includes two pieces of upper mobile boards 13, and lower adjustable plate group includes two pieces of lower portable plates 15, and the vertical blanking plate group Including two pieces of vertical panels 14, top of two pieces of upper mobile boards 13 respectively with two pieces of vertical panels 14 is flexibly connected, two pieces Bottom of the lower portable plate 15 respectively with two pieces of vertical panels 14 is flexibly connected, and two pieces of top margins of upper mobile board 13 pass through Sliding block is slidably connected with being arranged on the slide rail 17 on the top of feeding hopper 19, and the base of two pieces of lower portable plates 15 is also by cunning It is dynamic to be slidably connected with being arranged on the slide rail 17 of the bottom of feeding hopper 19;Two pieces of top edges of upper mobile board 13 pass through sliding block and cunning Rail 17 is slidably connected, and for the bottom side edge of lower portable plate 15 along being slidably connected also by sliding block and slide rail 17, pushing mechanism 18 selects gas Cylinder, adapter cavity is formed between two pieces of vertical panels 14, the both ends of two pieces of vertical panels 14 are injected in the body of feeding hopper 19, are needing blanking When, pull two upper mobile boards, 13, two lower portable plates 15 to be displaced outwardly by cylinder, opening is magnified, when needing charging, and When not needing blanking, promote two upper mobile boards, 13, two lower portable plates 15 to move inward by cylinder, reduce opening, block Opening, charging, after filling, can rationally be set according to above-mentioned cutting mode blanking, the transmission interval of cylinder, ensure rational and orderly Pan feeding, in addition, the present invention is to ensure the mobile accuracy of upper mobile board 13 and lower portable plate 15, therefore setting slide rail 17, Moved left and right in slide rail 17, not only position is accurate, and slides conveniently, and resistance is small.
In the present invention, the rotary auxiliary dials core mechanism and includes rotary shaft 26 and be located in the rotary shaft 26 One circle dials core tooth 27, and each core tooth 27 of dialling is arcuate structure, and corn plug often be present in discharging is blocked in row At core mouth 29, thresing machine discharge blockage is caused, machine breaks down, and is unfavorable for the long-time normal operation of threshing, and the present invention is The speed of corn plug discharging is improved, therefore sets rotary auxiliary to dial core mechanism, the mechanism structure is simple, in the process of rotation In by dial core tooth 27 plug is outwards transferred in order, improve plug discharging speed, prevent discharging opening from blocking.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (8)

1. small-sized corn thresher, the thresing machine includes pan feeding part, threshing part, screen fraction, output section and machine Frame part, it is characterised in that:Three parts are included in the rack section, feeding warehouse, threshing bin is followed successively by and goes out core storehouse, in institute State feeding warehouse, threshing bin and go out lateral direction penetrating connection threshing mechanism in the three of core storehouse, and in the feeding warehouse, threshing bin And going out the sorting mechanism for integrally being penetrated in core storehouse and rounded distribution being set, the threshing mechanism is located at the sorting mechanism It is interior, it is additionally provided with screen cloth in the bottom of the sorting mechanism;The pan feeding part is arranged on the rack section upper end, and is located at institute The charging aperture upper end of threshing part is stated, adjustable order feeding machine structure is provided with the pan feeding part, is provided with the output section Rotary auxiliary dials core mechanism;The threshing part includes two-stage separating mechanism, and the threshing bin is divided into described two by dividing plate Level separating mechanism, the two opposite sides of the threshing bin are equipped with grating type notch board layer.
2. small-sized corn thresher according to claim 1, it is characterised in that:The threshing mechanism is by being arranged on Transport mechanism drive connection on rack section, and the threshing mechanism is a threshing axle, edge is entered in the threshing axle Material direction sets gradually feed auger piece group, threshing tooth group and row's core plate group.
3. small-sized corn thresher according to claim 2, it is characterised in that:The threshing tooth group includes what is be staggered Coronal flat board tooth and flat board tooth.
4. small-sized corn thresher according to claim 1, it is characterised in that:The sorting mechanism includes some cylinders, Some cylinders are angularly distributed in 360 degree, are round positioned at the cylinder distribution shape of the pan feeding part and output section 3/4ths, the cylinder distribution shape positioned at the threshing part is round half.
5. small-sized corn thresher according to claim 1, it is characterised in that:The pan feeding part includes feeding hopper, The adjustable order feeding machine structure is set in the feeding hopper, and the adjustable order feeding machine structure includes upper adjustable plate group, vertical Blanking plate group and lower adjustable plate group, the vertical blanking plate group are vertically fixed in the feeding hopper, the upper adjustable plate group, Lower adjustable plate group is respectively and movably connected to the top and bottom of the vertical blanking plate group, and the upper adjustable plate group, under it is adjustable Plate group is respectively connected with pushing mechanism.
6. small-sized corn thresher according to claim 5, it is characterised in that:The upper adjustable plate group includes two pieces of upper work Dynamic plate, lower adjustable plate group includes two pieces of lower portable plates, and the vertical blanking plate group includes two pieces of vertical panels, two pieces of upper work Top of the dynamic plate respectively with two pieces of vertical panels is flexibly connected, two pieces of lower portable plates respectively with two pieces of vertical panels Bottom is flexibly connected.
7. small-sized corn thresher according to claim 6, it is characterised in that:Two pieces of upper mobile board top margins pass through cunning Block is slidably connected with being arranged on the slide rail on the feeding hopper top, and the base of two pieces of lower portable plates also by slip and is set Slide rail in the feeding hopper bottom is slidably connected.
8. small-sized corn thresher according to claim 1, it is characterised in that:The rotary auxiliary, which dials core mechanism, to be included Rotary shaft and the circle being located in the rotary shaft dial core tooth, and each core tooth of dialling is arcuate structure.
CN201710742483.6A 2017-08-25 2017-08-25 Small-sized corn thresher Pending CN107396699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710742483.6A CN107396699A (en) 2017-08-25 2017-08-25 Small-sized corn thresher

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Application Number Priority Date Filing Date Title
CN201710742483.6A CN107396699A (en) 2017-08-25 2017-08-25 Small-sized corn thresher

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108235867A (en) * 2018-01-15 2018-07-03 山东交通职业学院 A kind of corn threshing device

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Publication number Priority date Publication date Assignee Title
CN201418288Y (en) * 2009-06-08 2010-03-10 甘肃农业大学 Spiral plate teeth type threshing device of corn thresher
CN201418289Y (en) * 2009-06-08 2010-03-10 甘肃农业大学 Variable-rigidity pressure plate device of corn cob discharging port of kneading type corn thresher
CN101720602A (en) * 2008-10-28 2010-06-09 杨井华 Corn peeling machine
CN104206127A (en) * 2014-09-16 2014-12-17 河南科技大学 Low-breakage rolling tooth type corn thresher
CN104608947A (en) * 2015-01-09 2015-05-13 常州先进制造技术研究所 Quantitative particle material feeding system
CN204408980U (en) * 2014-12-09 2015-06-24 呼图壁县和玉生物科技有限公司 Squeeze stranding formula husker sheller
CN105830667A (en) * 2016-05-25 2016-08-10 金陵科技学院 Self-adaptive plate tooth corn thresher
CN106579478A (en) * 2016-12-27 2017-04-26 青岛智享专利技术开发有限公司 Potato full-automatic annular peeling device
CN207167098U (en) * 2017-08-25 2018-04-03 泰州职业技术学院 Small-sized corn thresher

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101720602A (en) * 2008-10-28 2010-06-09 杨井华 Corn peeling machine
CN201418288Y (en) * 2009-06-08 2010-03-10 甘肃农业大学 Spiral plate teeth type threshing device of corn thresher
CN201418289Y (en) * 2009-06-08 2010-03-10 甘肃农业大学 Variable-rigidity pressure plate device of corn cob discharging port of kneading type corn thresher
CN104206127A (en) * 2014-09-16 2014-12-17 河南科技大学 Low-breakage rolling tooth type corn thresher
CN204408980U (en) * 2014-12-09 2015-06-24 呼图壁县和玉生物科技有限公司 Squeeze stranding formula husker sheller
CN104608947A (en) * 2015-01-09 2015-05-13 常州先进制造技术研究所 Quantitative particle material feeding system
CN105830667A (en) * 2016-05-25 2016-08-10 金陵科技学院 Self-adaptive plate tooth corn thresher
CN106579478A (en) * 2016-12-27 2017-04-26 青岛智享专利技术开发有限公司 Potato full-automatic annular peeling device
CN207167098U (en) * 2017-08-25 2018-04-03 泰州职业技术学院 Small-sized corn thresher

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108235867A (en) * 2018-01-15 2018-07-03 山东交通职业学院 A kind of corn threshing device

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