CN111837649B

CN111837649B - Corn thresher

Info

Publication number: CN111837649B
Application number: CN202010727058.1A
Authority: CN
Inventors: 肖佑明
Original assignee: Nanjing Xuanshi Qiyuan Software Technology Co Ltd
Current assignee: Nanjing Xuanshi Qiyuan Software Technology Co Ltd
Priority date: 2020-07-26
Filing date: 2020-07-26
Publication date: 2021-11-19
Anticipated expiration: 2040-07-26
Also published as: CN111837649A

Abstract

The invention discloses a corn thresher, wherein a treatment box is provided with a box body, sliding grooves, a moving shaft, a spring strip, a thresher and a rotating shaft, the sliding grooves are arranged on two sides of the box body, the moving shaft is in sliding connection with the sliding grooves, the spring strip is movably connected with the moving shaft through a connecting shaft, the spring strip is mechanically connected with the rotating shaft, the rotating shaft is arranged on the thresher, the spring strip above the moving shaft is shorter than the spring strip below the moving shaft, and the thresher inclines inwards to form a trapezoidal outlet under the cooperation of the spring strip when not in operation.

Description

Corn thresher

Technical Field

The invention relates to the field of agricultural machinery, in particular to a corn thresher.

Background

Corn contains rich nutrient substances such as protein, vitamins and the like, and is an important grain and feed crop, the corn needs to be threshed when being sowed or used as feed, in the past, the corn is firstly planed into a gap by manpower, and the corn is rotationally rubbed by hand strength to lead corn kernels to fall off, so that the efficiency is low, and in the process, the hands can generate bubbles and be injured due to friction, so that people later introduce a thresher to replace the manpower;

in prior art, the thresher is the installation spike tooth on the rotary drum, high-speed rotation through the rotary drum, drive the spike tooth and thresh the maize, but because the particularity of maize structure, narrow size differs about wide, at the in-process of threshing, the unable whole niblets that contact of spike tooth, lead to the maize can't break away from the maize stalk completely, the niblet all is orderly zonulae occludens on the maize stalk in addition, and the contact surface of niblet is glossy arcwall face, and the spike tooth mostly is the planar structure of front end for circular face, do not laminate with the niblet, can't realize threshing completely of maize.

Disclosure of Invention

Aiming at the defects of the prior art, the invention is realized by the following technical scheme: a corn thresher structurally comprises a feeding port, a control box, a processing box, a discharging port, a motor box and a machine body, wherein the feeding port is arranged above the processing box, the processing box is mechanically connected with the machine body, the control box is arranged on the side surface of the machine body, the motor box is arranged on the machine body, and the discharging port is fixedly connected with the processing box;

the processing box is equipped with box, spout, removal axle, spring strip, thresher, pivot, the both sides of box are equipped with the spout, remove axle and spout sliding connection, the spring strip passes through the connecting axle and removes an swing joint, spring strip and pivot mechanical connection, the pivot is established on the thresher, the spring strip that removes the epaxial side compares the short of below, when the thresher does not work under the cooperation of spring strip, the leanin forms trapezoidal export.

As a further optimization of the technical scheme, the thresher is provided with a thresher body, a pull shaft, a threshing body, a scrap sucking body, a receiving groove and a guide cavity, wherein the threshing body is arranged on the side surface of the thresher body, the guide cavity is arranged in the thresher body, the scrap sucking body is arranged on the outer side of the guide cavity, the receiving groove is connected with the guide cavity in a sliding manner, the pull shaft is fixedly connected with the receiving groove, and one end of the guide cavity, which is close to the lower part of the scrap sucking body, is inclined inwards.

As a further optimization of the technical scheme, the port of the material receiving groove is an inward inclined edge, and the port of the material receiving groove is matched with the inclined edge of the guide cavity after the material receiving groove is installed.

As a further optimization of the technical scheme, the threshing body is provided with a slide rail, a threshing block, a sliding shaft, a threshing panel, a beating block and a supporting block, the slide rail is connected with the sliding shaft in a sliding manner, the threshing block is mechanically connected with the sliding shaft, the slide rail is arranged above the middle part of the threshing panel, the supporting block is arranged on the threshing panel and is connected with the beating block through a connecting shaft, the front end of the threshing panel is in a dome shape and is of a flat structure inclined inwards, the periphery of the threshing panel is a threaded wavy edge, and the dome at the front end of the threshing panel is thinner towards the outer side.

As a further optimization of this technical scheme, the slide rail is formed by the combination of the ascending semicircle track of radian and a straight track, the structure that the sliding shaft comprises two mutual sliding connection of slider, threshing block is inside sunken arch arcuation structure, through connecting axle and the rectangular structure swing joint of an arch wave on threshing block's the arcuation structure's of top both sides.

As a further optimization of the technical scheme, the supporting block is an arc-shaped spring block, one end of the supporting block abuts against two sides of the striking block respectively, the top of the striking block is connected with a ball structure, and a raised edge of a thread wavy edge is arranged on the surface of the ball structure of the striking block.

As a further optimization of this technical scheme, inhale the bits body and be equipped with threshing ball, attach the bits body, choose the piece, filter ball, grind the body, clutch blocks, connect chamber, water conservancy diversion flabellum, threshing ball installs on filter ball, threshing ball's both sides are equipped with attaches the bits body, filter ball and water conservancy diversion flabellum mechanical connection, the filter ball below is equipped with connects the chamber, connect intracavity internally mounted clutch blocks, clutch blocks passes through connecting axle swing joint with the body that grinds, choose the piece and filter ball fixed connection, the front end of clutch blocks is the arc piece, the arc piece surface of clutch blocks is equipped with the coarse piece on dull polish layer, threshing ball's surface is equipped with trapezoidal thin block, choose the piece to choose to collude the column structure for the radian to left arc.

As the further optimization of the technical scheme, the chip attaching body is an arc-shaped connecting column with the surface inwards recessed, a protruding block with the top end being a sphere structure is arranged on the port surface of the arc-shaped connecting column of the chip attaching body, an adhesive layer is arranged on the front end surface of the protruding block of the chip attaching body, an arc-shaped groove with downward inclination is arranged on the rubbing body, and a rough surface with the protruding block is arranged on the groove surface of the rubbing body.

Advantageous effects

Compared with the prior art, the corn thresher has the following advantages:

1. the spring strip above the moving shaft is shorter than the spring strip below the moving shaft, so that the threshing device is inclined inwards to form a trapezoidal outlet in a non-working state, the threshing device conforms to the general structure of corn, when corn kernels fall, the threshing device can be attached to the corn, the spring strip has elasticity, and when the diameter of the corn is too large, the corn is firmly attached through extrusion force.

2. The port of the receiving groove is matched with the inclined edge of the guide cavity after the receiving groove is installed, so that fines generated during corn threshing can slide onto the receiving groove along the inclined edge, the receiving groove is in sliding connection with the guide cavity, and after the equipment is finished, the receiving groove can be directly taken out through the pull shaft to clean the fines, so that the fines cannot fly around along with the discharge of corn kernels.

3. The front end of the threshing panel is of a dome-shaped and inward-inclined flat structure, the threshing panel is similar to the structure of corn kernels and can be better attached to corn, and the dome at the front end of the threshing panel is provided with a thin edge towards the outer side, so that the connecting gap of the corn kernels can be clamped during threshing, and the threshing effect is further improved.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

FIG. 1 is a schematic view of the whole structure of a corn thresher according to the present invention.

FIG. 2 is a schematic view of the structure of the treatment tank of the present invention.

Fig. 3 is a schematic view of the structure of the thresher of the present invention.

Fig. 4 is a schematic view of the structure of the threshing body of the present invention.

Fig. 5 is a diagram of the operation state of fig. 4.

FIG. 6 is a schematic view of the structure of the chip absorbing body of the present invention.

In the figure: the device comprises a feeding port 1, a control box 2, a treatment box 3, a discharging port 4, a motor box 5, a machine body 6, a box body 30, a sliding groove 32, a moving shaft 33, a spring strip 35, a thresher 36, a rotating shaft 37, a machine body 361, a pulling shaft 362, a threshing body 363, a chip suction body 364, a receiving groove 365, a guide cavity 366, a sliding rail 631, a threshing block 632, a sliding shaft 633, a threshing panel 634, a hitting block 635, a supporting block 636, a threshing ball 641, a chip attaching body 642, a picking block 643, a filter ball 644, a rubbing body 645, a friction block 646, a connecting cavity 647 and guide fan blades 648.

Detailed Description

In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the following description and the accompanying drawings further illustrate the preferred embodiments of the invention.

Example one

Referring to fig. 1-5, the invention provides a corn thresher, which structurally comprises a feed port 1, a control box 2, a treatment box 3, a discharge port 4, a motor box 5 and a machine body 6, wherein the feed port 1 is arranged above the treatment box 3, the treatment box 3 is mechanically connected with the machine body 6, the control box 2 is arranged on the side surface of the machine body 6, the motor box 5 is arranged on the machine body 6, and the discharge port 4 is fixedly connected with the treatment box 3;

handle case 3 and be equipped with box 30, spout 32, removal axle 33, spring strip 35, thresher 36, pivot 37, the both sides of box 30 are equipped with spout 32, remove axle 33 and spout 32 sliding connection, spring strip 35 is through connecting axle and removal axle 33 swing joint, spring strip 35 and pivot 37 mechanical connection, pivot 37 is established on thresher 36, the spring strip 35 that removes axle 33 top compares the short of below, thresher 36 does not work the time under spring strip 35's cooperation, and the leanin forms trapezoidal export, laminating maize that can be fine.

The thresher 36 is provided with a thresher body 361, a pull shaft 362, a thresher body 363, a chip suction body 364, a chip receiving groove 365 and a guide cavity 366, the side surface of the thresher body 361 is provided with the threshing body 363, the guide cavity 366 is installed in the thresher body 361, the chip suction body 364 is arranged on the outer side of the guide cavity 366, the chip receiving groove 365 is connected with the guide cavity 366 in a sliding manner, the pull shaft 362 is fixedly connected with the chip receiving groove 365, and one end of the guide cavity 366, which is close to the lower part of the chip suction body 364, is inclined inwards, so that the threshing effect is realized.

The port of the material receiving groove 365 is an inward inclined edge, and the port of the material receiving groove 365 is matched with the inclined edge of the guide cavity 366 after the material receiving groove 365 is installed, so that the falling fine scraps are received.

Threshing body 363 is equipped with slide rail 631, threshes piece 632, slip axle 633, threshes panel 634, hits piece 635, supporting shoe 636, slide rail 631 and slip axle 633 sliding connection, threshing body 632 and slip axle 633 mechanical connection, slide rail 631 is established in threshing panel 634 upper side, be equipped with supporting shoe 636 on the panel 634 of threshing, supporting shoe 636 is through the connecting axle with hit piece 635, the front end of threshing panel 634 is the calotte to the flat structure of leanin, the periphery of threshing panel 634 is screw thread wave limit, the calotte of threshing panel 634 front end is more thin to the outside more, and the wave limit can be better laminating kernel of corn clearance, conveniently threshes.

Slide rail 631 is formed by the combination of the ascending semicircle track of radian and a straight track, sliding shaft 633 is by the structure that two mutual sliding connection of slider constitute, threshing block 632 is inside sunken arch arcuation structure, threshing block 632's arcuation structure's the top both sides through the rectangular structure swing joint of connecting axle and an arch wave on the arcuation structure, further realizes improving equipment's threshing effect.

The supporting block 636 is an arc-shaped spring block, one end of the supporting block 636 is respectively abutted against two sides of the beating block 635, the top of the beating block 635 is connected with a sphere structure, the surface of the sphere structure of the beating block 635 is provided with a convex edge with a thread wave edge, and corn kernels are more easily fallen off through elasticity and beating force.

Corn enters from the feeding hole 1, a power supply is started, under the coordination of the control box 2, the corn falls on the working cavity and is clamped in the middle by the thresher 36, at the moment, the rotating shaft 37 rotates at a high speed to drive the thresher 36 to rotate, the side of the peripheral wavy structure of the threshing body 363 of the thresher 36 is clamped on the clearance of the corn kernels, when the thresher 36 rotates, the wave-breaking side of the threshing body 363 is twisted with the clearance of the corn, the corn kernels are separated from the corn stalks according to the force during twisting, and a part of the corn stalks separated from the corn rotate along with the rotation, the occupied space of the corn kernels is reduced, the surface of the corn is slowly contacted with the surface of the threshing panel 634, at the moment, the beating block 635 is contacted with the corn and swings, in the swinging process, the convex side of the thread wavy side of the beating block 635 is contacted with the clearance of the corn, and is clamped on the clearance due to the groove at the joint, the rotating shaft 37 continuously rotates

The side of the beating block 635 is also provided with the supporting elastic force of a spring, after the beating block 635 is abutted and buckled, the beating block 635 can swing left and right, corn left on corn stalks is beaten down through swinging beating force, in the process, the sliding shaft 633 can move upwards along the sliding rail 631, after the sliding shaft moves above the straight track, the sliding shaft slides back and forth along the semicircular track with upward radian, the inner wall connecting rod of the sliding shaft 633 can extend outwards for a certain distance to push the threshing block 632 out of the threshing panel 634, as the threshing block 632 is of an arc-shaped structure and the contact surface of the corn is also arc-shaped, the threshing block 632 can better fit the corn stalks, and the arc-shaped arc strips on two sides above the threshing block 632 can take the connecting shaft as the center and extend out of the surface of the threshing block 632, so that the contact area of threshing is increased, through the dynamics of swing back and forth, follow the root cutting with the kernel of corn for the kernel of corn drops, and the arc slide radian of slide rail 631 is changed, takes off a grain piece 632 and will take place the displacement at the slip in-process, has the position change, can follow the complete threshing of further realization maize.

Example two

Referring to fig. 1-6, the invention provides a corn thresher, which structurally comprises a feed port 1, a control box 2, a treatment box 3, a discharge port 4, a motor box 5 and a machine body 6, wherein the feed port 1 is arranged above the treatment box 3, the treatment box 3 is mechanically connected with the machine body 6, the control box 2 is arranged on the side surface of the machine body 6, the motor box 5 is arranged on the machine body 6, and the discharge port 4 is fixedly connected with the treatment box 3;

The chip suction body 364 is provided with a threshing ball 641, a chip attaching body 642, a picking block 643, a filter ball 644, a grinding body 645, a friction block 646, a connecting cavity 647 and a guide fan blade 648, the threshing ball 641 is installed on the filter ball 644, the chip attaching body 642 is arranged on two sides of the threshing ball 641, the filter ball 644 is mechanically connected with the guide fan blade 648, the connecting cavity 647 is arranged below the filter ball 644, the friction block 646 is installed inside the connecting cavity 647, the friction block 646 is movably connected with the grinding body 645 through a connecting shaft, the picking block 643 is fixedly connected with the filter ball 644, the front end of the friction block 646 is an arc-shaped block, the surface of the arc-shaped block of the friction block 646 is provided with a coarse block of a grinding layer, the surface of the threshing ball 641 is provided with a trapezoidal thin block, and the picking block 643 is an arc-shaped picking hook structure with an arc shape towards the left side in radian so as to remove fine chips of corn threshing.

The surface of the chip attaching body 642 is an inwards-concave arc-shaped connecting column, a convex block with a spherical structure at the top end is arranged on the port face of the arc-shaped connecting column of the chip attaching body 642, an attachment layer is arranged on the surface of the front end of the convex block of the chip attaching body 642, an arc-shaped groove which inclines downwards is arranged on the grinding body 645, and a rough surface provided with the convex block is arranged on the groove surface of the grinding body 645, so that the chip removing effect is further achieved.

On the basis of the first embodiment, the chip absorbing body 364 and the flow guiding fan blades 648 rotate counterclockwise around the origin, the trapezoidal blocks on the surface of the threshing ball 641 can further knock down the corn kernels during the rotation, the chip absorbing body 364 and the flow guiding fan blades 648 can generate a reverse air flow, the weight of the fine chips is light, the fine chips can be reversely flowed to the filter ball 644, the corn kernels can be prevented from entering the guide cavity 366 and being cleaned together when the filter ball 644 slides into the receiving groove 365 from the guide cavity 366 through the grids of the filter ball 644, the front end surface of the convex block of the chip absorbing body 642 is provided with an attachment layer for attaching the fine chips, the convex block is of a spherical structure, the surface is arc-shaped, the contact area with the corn is small, the corn itself has gravity, and the surface is smooth and is not easy to attach to the chip absorbing body 642, the corn stigma is not brought to the guide cavity 366 by the chip attaching body 642, when the chip absorbing body 364 of the chip absorbing body 364 rotates to the lower part, the rubbing body 645 rotates for a certain angle, so that the groove of the rubbing body 645 is in contact with the chip absorbing body 364, fine chips on the upper surface are scraped by the grinding layer of the groove of the rubbing body 645, the situation that the fine chips attached to the chip absorbing body 364 are too much and the adhesive force is reduced is prevented, long whiskers of the fine corn can exist in the corn, at the moment, the long whiskers can be hooked by the picking block 643, the arc direction of the picking block 643 is leftward, the corn whiskers can be hooked towards the inner direction during rotation, when the picking block 643 rotates counterclockwise, the long whiskers are in contact with the friction block 646 to generate friction, the corn whiskers are separated from the picking block 643 through the friction force, the friction body of the friction block 646 is arc-shaped, and the corn whiskers can slide to the receiving groove 365 through the arc of the arc-shaped block.

While there have been shown and described what are at present considered the fundamental principles of the invention, the essential features and advantages thereof, it will be understood by those skilled in the art that the present invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but rather, is capable of numerous changes and modifications in various forms without departing from the spirit or essential characteristics thereof, and it is intended that the invention be limited not by the foregoing descriptions, but rather by the appended claims and their equivalents.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A corn thresher is characterized in that: the structure of the device comprises a feed inlet (1), a control box (2), a treatment box (3), a discharge port (4), a motor box (5) and a machine body (6), wherein the feed inlet (1) is arranged above the treatment box (3), the treatment box (3) is mechanically connected with the machine body (6), the control box (2) is arranged on the side surface of the machine body (6), the motor box (5) is arranged on the machine body (6), and the discharge port (4) is fixedly connected with the treatment box (3); the treatment box (3) is provided with a box body (30), sliding grooves (32), a moving shaft (33), spring strips (35), a thresher (36) and a rotating shaft (37), the sliding grooves (32) are formed in two sides of the box body (30), the moving shaft (33) is in sliding connection with the sliding grooves (32), the spring strips (35) are movably connected with the moving shaft (33) through connecting shafts, the spring strips (35) are mechanically connected with the rotating shaft (37), and the rotating shaft (37) is arranged on the thresher (36); the thresher (36) is provided with a thresher body (361), a pull shaft (362), a threshing body (363), a scrap sucking body (364), a material receiving groove (365) and a guide cavity (366), wherein the side surface of the thresher body (361) is provided with a threshing body (363), the guide cavity (366) is installed in the thresher body (361), the scrap sucking body (364) is arranged on the outer side of the guide cavity (366), the material receiving groove (365) is in sliding connection with the guide cavity (366), and the pull shaft (362) is fixedly connected with the material receiving groove (365); the port of the material receiving groove (365) is an inward inclined edge, and the port of the material receiving groove (365) is matched with the inclined edge of the guide cavity (366) after the material receiving groove (365) is installed; the threshing body (363) is provided with a sliding rail (631), a threshing block (632), a sliding shaft (633), a threshing panel (634), a beating block (635) and a supporting block (636), the sliding rail (631) is in sliding connection with the sliding shaft (633), the threshing block (632) is mechanically connected with the sliding shaft (633), the sliding rail (631) is arranged above the middle of the threshing panel (634), the threshing panel (634) is provided with the supporting block (636), and the supporting block (636) is connected with the beating block (635) through a connecting shaft; the sliding rail (631) is formed by combining a semicircular rail with an upward radian and a straight rail, the sliding shaft (633) is of a structure formed by mutually sliding and connecting two sliding blocks, and the threshing block (632) is of an inwards-concave arc-shaped structure; the supporting block (636) is an arc-shaped spring block, one end of the supporting block (636) is respectively abutted against two sides of the beating block (635), the top of the beating block (635) is connected with a sphere structure, and a convex edge of a thread wave edge is arranged on the surface of the sphere structure of the beating block (635); the sawdust absorbing body (364) is provided with a threshing ball (641), a sawdust attaching body (642), a picking block (643), a filter ball (644), a grinding body (645), a friction block (646), a connecting cavity (647) and guide fan blades (648), the threshing ball (641) is arranged on the filter ball (644), the sawdust attaching body (642) is arranged on two sides of the threshing ball (641), the filter ball (644) is mechanically connected with the guide fan blades (648), a connecting cavity (647) is arranged below the filter ball (644), the friction block (646) is arranged in the connecting cavity (647), the friction block (646) is movably connected with the grinding body (645) through a connecting shaft, and the picking block (643) is fixedly connected with the filter ball (644); the chip attaching body (642) is an arc-shaped connecting column with an inward concave surface, a convex block with a spherical structure at the top end is arranged on the port surface of the arc-shaped connecting column of the chip attaching body (642), an attachment layer is arranged on the front end surface of the convex block of the chip attaching body (642), an arc-shaped groove inclining downwards is arranged on the grinding body (645), and a rough surface provided with the convex block is arranged on the groove surface of the grinding body (645).

2. The corn thresher of claim 1, wherein: corn enters from a feeding hole (1), a power supply is started, under the coordination of a control box (2), the corn falls on a working cavity and is clamped in the middle by a thresher (36), at the moment, a rotating shaft (37) rotates at a high speed to drive the thresher (36) to rotate, the side of a peripheral wave-shaped structure of a threshing body (363) of the thresher (36) can be clamped in the clearance of corn kernels, when the thresher (36) rotates, the wave-breaking side of a threshing body (363) can be twisted with the clearance of the corn, the corn kernels are separated from the corn stalks according to the force during twisting, a part of the corn stalks separated from the corn kernels rotate along with the rotation, the occupied space of the corn kernels is reduced, the surface of the corn kernels can slowly contact with the surface of a threshing panel (634), at the moment, a beating block (635) contacts with the corn and swings, and the convex side of the thread wave side of the beating block (635) contacts with the clearance of the corn, will because the groove of junction, block on the interval, the spindle (37) rotates continuously, will have reverse direction effort with hitting the piece (635), make the corn kernel drop, and hit the side of the piece (635) and have supporting spring force of the spring, after the upper side is withheld, hit the piece (635) and can swing from side to side, through the hitting power of swing, will miss the corn on the corn stalk and hit off, in this process, the sliding shaft (633) will move up along the slide rail (631), after moving to the straight orbit top, slide back and forth along the ascending semicircular orbit of radian, the inner wall connecting rod of the sliding shaft (633) will extend out certain distance, release the threshing block (632) and release the threshing panel (634), because threshing block (632) is the arc structure of arc, and the contact surface of the corn is also arc, so threshing block (632) can be better laminated to the corn, and the arc strip of both sides above threshing block (632) will regard connecting axle as the center, the threshing block (632) extends out of the body from the surface of the threshing block (632), so that the contact area of threshing is increased, corn kernels are cut from the root by the force of back and forth swing, the corn kernels fall off, the radian of the arc-shaped slide way of the slide rail (631) is changed, the threshing block (632) can be displaced and changed in position in the sliding process, and the complete threshing of the corn can be further realized; the corn cob threshing device is characterized in that a chip suction body (364) is installed, the chip suction body (364) and a flow guide fan blade (648) rotate anticlockwise around an original point, trapezoidal blocks on the surface of a threshing ball (641) can further knock down corn cobs in the rotating process, the chip suction body (364) and the flow guide fan blade (648) can generate a reverse airflow, the quality of the fine chips is light, the fine chips can be reversely flowed onto a filter ball (644), the filter ball (644) slides into a receiving groove (365) from a guide cavity (366) through grids of the filter ball (644), the filter ball (644) can block the corn cobs while allowing the fine chips to enter, the corn cobs are prevented from entering the guide cavity (366) and being cleaned out together, an attachment layer is arranged on the front end surface of a convex block of the chip suction body (642), the fine chips can be adhered to the convex block to form a ball structure, the surface is arc-shaped, the contact area with the corn is small, the corn self has gravity, and the surface of the corn cob is smooth, is not easy to be attached to the scrap attaching body (642) and can not be brought to the guide cavity (366) by the scrap attaching body (642), when the scrap absorbing body (364) of the scrap absorbing body (364) rotates to the lower part, the grinding body (645) rotates for a certain angle, so that the groove of the grinding body (645) is contacted with the scrap absorbing body (364), the fine scraps on the groove are scraped off by the grinding layer of the grinding body (645), the phenomenon that the fine scraps attached to the scrap absorbing body (364) are excessive and the adhesive force is reduced is prevented, the long-strip silks of the fine-scrap corns still exist in the corns, at the moment, the long-strip silks are hooked by the picking block (643), the arc direction of the picking block (643) is leftwards, the corn silks can be hooked towards the inner direction during the rotation, when the picking block (643) rotates anticlockwise, the long-strip silks are contacted with the friction block (646) to generate friction, the corn silks are separated from the picking block (643) through the friction force, and the friction body of the friction block (646) is arc-shaped, the corn stigma can slide down to the receiving trough (365) through the radian of the arc-shaped block.