CN108575287B - Novel bionic snapping roll type sweet corn snapping mechanism - Google Patents

Abstract

The invention belongs to the technical field of agricultural machinery, and relates to a novel bionic snapping roll type sweet corn snapping mechanism. The ear picking device, the plant clamping device and the seedling cutting device are sequentially arranged on the frame from top to bottom, and power is provided by a hydraulic motor. Under the drive of a hydraulic motor, sweet corn plants are harvested by the harvesting device, the plant clamping device clamps and conveys the cut plants, and sweet corn ears are harvested under the cooperation of the ear picking device. According to the corn harvester, the crank sliding block mechanism is adopted to harvest corn plants, and the three sections of clamping conveying chains are used for fixing, clamping and conveying corn stalks, and finally, the corn harvester is matched with the corn harvesting device which rotates oppositely and has a bionic effect to harvest sweet corn ears, so that nondestructive, efficient and smooth harvesting of the sweet corn ears is realized. The invention is suitable for the ear harvesting operation of the sweet corn main producing area and reduces the labor burden of sweet corn growers.

Description

Novel bionic snapping roll type sweet corn snapping mechanism

Technical Field

The invention belongs to the technical field of agricultural machinery, and particularly relates to a novel bionic snapping roll type sweet corn snapping mechanism.

Background

In 2016, the total amount of domestic sweet corn reaches 100 ten thousand hectares, and moreover, the demand and export of the sweet corn in the next few years are likely to be increased, and the domestic planting scale is also increased. According to the consumption level and population number calculation of China, the sweet corn planting potential of China reaches 1500 ten thousand mu, the pure yield value of each mu is calculated according to 600 yuan, and a 90 hundred million yuan huge market is created. Along with the expansion of the planting scale of the sweet corn, the mechanization of the sweet corn production is not realized, the production process of the sweet corn at present also depends on manpower, especially the harvesting process is completely finished by manpower, the labor burden of farmers is greatly increased, and the popularization of the sweet corn planting technology is seriously hindered.

Because of the special working environment for harvesting sweet corn and the lack of domestic research, the development of the sweet corn harvesting machine is basically in a blank state, the clamping ear picking mechanism in the existing sweet corn harvester cutting table is driven by a hydraulic motor arranged on a driving belt pulley after two corresponding groups of clamping pipes are staggered, the driven belt pulley and a reel are driven to rotate, corn stalks with ears are clamped by the reel and are clamped by belts on the driving belt pulley and the driven belt pulley, the hydraulic motor arranged on an ear picking roller drives the ear picking roller to pick ears, and the two groups of belts move in the same direction. However, the mechanism has a complex structure, two groups of hydraulic motors are needed to provide power at the same time, the production cost is improved, and the production benefit is low. The key component of the sweet corn harvesting machine is a corn picking mechanism, and when the existing corn picking equipment performs corn picking operation on sweet corn. The ear picking effect is not ideal enough, the ear picking loss is large, the damage to the ears is serious, the mechanical operation efficiency is low, and the like.

Disclosure of Invention

The invention aims to solve the problems of unsatisfactory ear picking effect, large ear picking loss, serious damage to ears, low mechanical operation efficiency and the like in the technical background when the sweet corn is picked, and provides a novel bionic picking roller type sweet corn picking mechanism.

The technical scheme of the invention is as follows: a novel bionic snapping roll type sweet corn snapping mechanism comprises a frame, and a snapping device, a plant clamping device and a harvesting device which are sequentially arranged on the frame from top to bottom, wherein power is provided by a hydraulic motor;

in the frame, a rectangular frame underframe is formed by a left transverse beam I, a right transverse beam I, a front longitudinal beam I and a rear longitudinal beam I which are parallel to each other, ear plates are welded on the outer side faces of the two transverse beams I, the ear plates are provided with threaded holes I with the diameter of 14mm, the whole mechanism is connected to the frame of the sweet corn harvester by matching bolts, the front longitudinal beam I is penetrated and provided with threaded holes II with the diameter of 8mm, the two vertical beams I are fixedly connected with the rectangular frame underframe, an included angle between the two vertical beams I is 10 degrees to 20 degrees, the two vertical beams II are welded on the upper surfaces of the two transverse beams I, the upper ends of the vertical beams II are fixedly connected with the longitudinal beams II, the middle part of the longitudinal beams II is provided with a hydraulic motor seat I, four threaded holes III with the diameter of 8mm are uniformly arranged on the round surface of the hydraulic motor seat I, the middle part of the frame is obliquely arranged with the inclination of 40 degrees to 50 degrees, one end of the inclined beams I is fixedly connected with the upper surface of the front longitudinal beam I, the other end is fixedly connected with the upper surface of a vertical beam I, the upper surface of the inclined beam I, which is close to two end surfaces, is welded with a connecting seat, two inclined beams are welded with two connecting seats, the connecting seats are penetrated and provided with threaded holes IV with the diameter of 10mm, six threaded holes IV with the diameter of 12mm are uniformly arranged on two sides of the connecting seats, three threaded holes IV are arranged in each row, the upper surface of the middle part of the inclined beam I is fixedly connected with two cross beams II which are parallel to each other, one end of the two cross beams II is connected with a triangular longitudinal beam I, one end of the triangular longitudinal beam I is provided with a snapping roller seat, the two snapping roller seats are matched with the two snapping roller seats connected with the triangular longitudinal beam II for installing a snapping device, a roller central shaft is welded on the snapping roller seat, the shaft length is 30mm, a longitudinal beam III is welded between the vertical beams I, the distance between the longitudinal beam III and the upper surface of the cross beam I is 400 mm-450 mm, the upper ends of the two inclined beams II which are perpendicular to the inclined beam I are welded, the upper ends of the two inclined beams II are provided with triangular longitudinal beams II and hydraulic motor seats II, the hydraulic motor seats II are perpendicular to the inclined beams II, the concave round surfaces of the hydraulic motor seats II are provided with threaded holes V with the diameter of 8mm, the length of the frame is 800-910 mm, the width is 150-200 mm, and the height is 1000-1100 mm;

the ear picking device mainly comprises two ear picking rollers, the surface of each ear picking roller shaft is welded with a bionic ear picking screw, the ear picking screw simulates a person to pick the sweet corn plants sent by the plant clamping device from top to bottom, the two ear picking screws are uniformly distributed on the ear picking roller shafts, shaft holes are formed at two ends of each ear picking roller shaft, the depth of each shaft hole is 40mm, the diameter of each shaft hole is 30mm, the two ear picking rollers are installed in a matched mode with a roller central shaft, and two small BMM-8 hydraulic motors are installed on each ear picking roller seat and provide power sources for the two ear picking rollers;

the plant clamping device consists of a left clamping single chain, a BMR-L hydraulic motor and a right clamping double chain, ten stem pulling hook chain links are uniformly distributed on the clamping chains in the left clamping single chain, an upper chute seat and a lower chute seat are connected to a connecting seat on a diagonal beam I through M12X 45 bolts, a sliding block I is arranged in the upper chute seat, the length of a spring I is 80mm, one end of the spring I is connected with the sliding block I, the other end of the spring I is sleeved on an M18X 60 bolt, a driven gear shaft is welded on the upper surface of the sliding block I, the diameter of the driven gear shaft is 40mm, the height of the spring I is 60mm, a driven gear tensioning device is formed by the driven gear shaft, a driven sprocket is arranged on the driven sprocket shaft, a limiting plate is matched with the M8X 32 bolt and is arranged on the driven sprocket shaft to limit the axial movement of the driven sprocket, a sliding block II is arranged in the lower chute seat, the length of the spring II is 40mm, one end of the spring II is connected with the slider II, the other end of the spring II is sleeved on an M18X 45 bolt, the upper surface of the slider II is welded with a driving chain shaft, the diameter of the driving chain shaft is 30mm, the height of the driving chain shaft is 60mm, the upper surface of the driving chain shaft is provided with a threaded hole VI, the slider II, the spring II, the M18X 45 bolt and the driving chain shaft form a driving wheel tensioning device, a driving chain wheel is arranged on the driving chain shaft, a clamping chain is matched with two chain wheels, the transmission ratio i=1.6-2.0 of the two chain wheels, the left clamping chain is overlooked, the clamping chain rotates clockwise, the right clamping chain has a structure similar to that of a left clamping chain, the distance between a lower clamping chain and an upper clamping chain is 100mm, the two clamping chains synchronously rotate, the rotation speed of the clamping chain is the same as that of the clamping chain, two BMR-80-L hydraulic motors provide power for the left clamping chain and the right clamping chain, the two BMR-80-L hydraulic motors are arranged on a hydraulic motor seat II, the BMR-80-L hydraulic motor is connected by four M8X32 bolts;

the corn harvesting device is characterized in that harvesting of corn stalks is completed by a four-bar mechanism, a hydraulic motor seat I is arranged on a longitudinal beam II and used for installing a BMR-80-L hydraulic motor for driving the four-bar harvesting mechanism to operate, a disc is sleeved on an output shaft of the BMR-80-L hydraulic motor and is connected with a disc crank through an M6 multiplied by 24 bolt to transmit power to the four-bar harvesting mechanism, the tail end of a harvesting cutter bar is rotationally connected with the disc crank through a connecting pin, the middle part of the cutter bar is in sliding connection with a cutter bar guide rail, the cutter bar guide rail is rotationally connected with a guide rail seat, the guide rail seat is connected with a longitudinal beam I of a frame through an M6 multiplied by 18 bolt, and the cutter bar is driven by the disc crank to swing left and right to cut the corn stalks;

preferably, the ear picking screw is an involute screw, in the rotation process of the ear picking roller, corn ears are conveyed from bottom to top, the included angle between the ears and corn stalks is gradually enlarged by the ear picking screw, finally, the ear picking operation is completed, a four-bar mechanism simulates a human hand-held cutting knife to harvest corn, the cutting knife swings left and right to harvest corn stalks, and the cutting knife swings left and right to harvest corn stalks so as to match with subsequent operations.

Preferably, in the snapping rolls, the minimum distance between the left snapping roll and the right snapping roll is 35-45 mm, the rotating speed is 120r/min, and the snapping rolls rotate at a low speed so as to avoid damaging corn ears by the snapping rolls.

Preferably, the chain spacing between the left clamping single chain and the right clamping double chain is 0mm, the three-section clamping chain spacing is 15-20 mm, and three contact points are formed on the cut corn stalks to form a lever structure for stable clamping.

Preferably, the stem pulling hook consists of a chain link shaft, a stem pulling curved surface and a stem pulling hook main body, wherein the height of the stem pulling hook is 45-50 mm, and the collection and auxiliary clamping of stems are realized.

Preferably, the distance between the cutter and the ground is not more than 130mm, and the cutter performs sharpening treatment, so that corn stalks can be harvested.

When the harvester works, the hydraulic pump is started to provide hydraulic power for the hydraulic motor, the BMR-80-L hydraulic motor and the BMM-8 hydraulic motor are driven to rotate, the clamping device, the ear picking device and the stalk cutting device are driven to run in a no-load mode to enable the whole harvester to run stably, the cutter of the stalk cutting device is driven to swing left and right to cut sweet corn stalks, the clamping device clamps the cut sweet corn stalks, the corn stalks are conveyed to the ear picking device along with the inclined clamping device, and the ear picking rollers which move relatively conduct ear picking operation on the sweet corn ears.

The beneficial effects of the invention are as follows: according to the corn harvester, the four-bar mechanism straw cutting device with the bionic effect is adopted for cutting the cornstalk, the inclined clamping device conveys the cut cornstalk upwards, the corn ears are picked by the opposite-rotating bionic snapping rollers, the nondestructive efficient harvesting of the sweet corn ears is realized, the harvester is high in picking efficiency, low in picking loss rate, good in fluency and small in ear damage, and the corn harvester is suitable for harvesting the sweet corns in a sweet corn main production area and reduces the labor intensity of sweet corn growers.

Drawings

FIG. 1 is a perspective view of a simulated snapping roll sweet corn snapping mechanism of the present invention;

FIG. 2 is a schematic perspective view of a frame according to the present invention;

FIG. 3 is a schematic view of a partial perspective structure of the frame shown in FIG. 2;

fig. 4 is a schematic perspective view of an ear picking device according to the present invention;

FIG. 5 is a schematic perspective view of the snapping roll of FIG. 4;

FIG. 6 is a schematic perspective view of a clamping device according to the present invention;

FIG. 7 is a schematic perspective view of the left clamp single chain of FIG. 6;

FIG. 8 is a schematic perspective view of the clamp chain base shown in FIG. 6;

FIG. 9 is a schematic perspective view of the right grip double strand shown in FIG. 6;

FIG. 10 is a schematic perspective view of the pull chain of FIG. 6;

FIG. 11 is a schematic perspective view of the draw hook of FIG. 6;

fig. 12 is a schematic view of the installation of the harvesting apparatus of the present invention;

fig. 13 is a schematic perspective view of a four-bar mechanism harvesting apparatus of the present invention.

In the figure: 1-frame, 2-left clamping single chain, 3-BMR-80-L hydraulic motor, 4-snapping roll, 5-right clamping double chain, 6-four bar mechanism, 101-ear plate, 102-cross beam I, 103-screw hole I, 104-vertical beam I, 105-longitudinal beam I, 106-screw hole II, 107-vertical beam II, 108-longitudinal beam II, 109-screw hole III, 110-hydraulic motor seat I, 111-connecting seat, 112-screw hole IV, 113-cross beam II, 114-triangle longitudinal beam I, 115-snapping roll seat, 116-roll center shaft, 117-oblique beam I, 118-longitudinal beam III, 119-oblique beam II, 120- -triangle stringer II, 121- -hydraulic motor seat II, 122- -threaded hole V, 201- -draw-hook link, 2011- -link axle, 2012- -draw-hook curve, 2013- -draw-hook body, 202- -clamp chain, 203- -upper slide seat, 204- -M8X 32 bolt, 205- -limiting plate, 206- -driven sprocket, 207- -M12X 45 bolt, 208- -spring I, 209- -spring II, 210- -drive sprocket, 211- -lower slide seat, 212- -M18X 60 bolt, 213- -threaded hole VI, 214- -drive sprocket axle, 215- -driven gear axle, 216- -slide I, 217- -slide II, 218- -M18×45 bolt, 301- -M8×32 bolt, 401- -bionic spike picking screw, 402- -snapping roll shaft, 403- -BMM-8 hydraulic motor, 404- -shaft bore, 501- -lower clamp chain, 502- -upper clamp chain, 601- -disk, 602- -knife bar guide, 603- -harvesting knife bar, 604- -guide rail seat, 605- -M6×18 bolt, 606- -connecting pin, 607- -disk crank, 608- -M6×24 bolt.

Detailed Description

The specific construction and operation of the present invention will be described with reference to the accompanying drawings and examples.

As shown in figure 1, the novel bionic snapping roll type sweet corn snapping mechanism mainly comprises a snapping device, a plant clamping device and a straw cutting device, wherein the snapping device, the plant clamping device and the straw cutting device are sequentially arranged on a frame 1 from top to bottom, and power is provided by a hydraulic motor.

As shown in fig. 2 and 3, a rectangular frame bottom frame is formed by a left cross beam I102, a right cross beam I102, a front longitudinal beam I105 and a rear longitudinal beam I105 which are parallel to each other, an ear plate 101 is welded on the outer side surfaces of the two cross beams I102, the ear plate 101 is provided with a threaded hole I103 with the diameter of 14mm, the whole mechanism is connected to a sweet corn harvester frame by matching bolts, the front longitudinal beam I105 penetrates through a threaded hole II 106 with the diameter of 8mm, two vertical beams I104 are fixedly connected with the rectangular frame bottom frame, an included angle between the two vertical beams I104 is 10-20 degrees, two vertical beams II 107 are welded on the upper surfaces of the two cross beams I102, the upper ends of the vertical beams II 107 are fixedly connected with a longitudinal beam II 108, a hydraulic motor seat I110 is arranged in the middle of the longitudinal beam II 108, four threaded holes III 109 with the diameter of 8mm are uniformly arranged on the concave round surface of the hydraulic motor seat I110, two inclined beams I117 are obliquely arranged in the middle of the frame, the inclination of the beam is 40-50 degrees, one end of the beam is fixedly connected with the upper surface of a front end longitudinal beam I105, the other end of the beam is fixedly connected with the upper surface of a vertical beam I104, the upper surface of an inclined beam I117, which is close to two end surfaces, is welded with a connecting seat 111, two inclined beams 117 are welded with two connecting seats 111, the connecting seats 111 are penetrated and provided with threaded holes IV 112 with the diameter of 10mm, six threaded holes IV 112 with the diameter of 12mm are uniformly arranged on two sides of the connecting seats 111, three threaded holes IV 112 are arranged in each row, the upper surface of the middle part of the inclined beam I117 is fixedly connected with two cross beams II 113 which are parallel to each other, one end of the two cross beams II 113 is connected with a triangular longitudinal beam I114, one end of the triangular longitudinal beam I114 is provided with a snapping roll seat 115, the two snapping roll seats 115 are matched with the triangular longitudinal beam II 120 to be connected with two snapping roll seats 115 for mounting snapping devices, a roll center shaft 116 is welded on the snapping roll seat 115, a longitudinal beam III 118 is welded between the vertical beams I104, the distance between the longitudinal beam III 118 and the upper surface of the transverse beam I102 is 400-450 mm, two oblique beams II 119 perpendicular to the oblique beams I117 are welded at the upper ends of the two oblique beams I117, a triangular longitudinal beam II 120 and a hydraulic motor seat II 121 are arranged at the upper ends of the two oblique beams II 119, the hydraulic motor seat II 121 is perpendicular to the oblique beams II 119, a threaded hole V122 with a penetrating diameter of 8mm is arranged on a concave circular surface of the hydraulic motor seat II 121, the length of the frame is 800-910 mm, the width of the frame is 150-200 mm, and the height of the frame is 1000-1100 mm.

As shown in fig. 4 and 5, the ear picking device mainly comprises two ear picking rollers 4, a bionic ear picking screw 401 is welded on the surface of each ear picking roller shaft 402, the ear picking screw 401 simulates a human hand to pick the sweet corn plants sent by the plant clamping device from top to bottom, the two ear picking screws 401 are uniformly distributed on each ear picking roller shaft 402, shaft holes 404 are formed in two ends of each ear picking roller shaft 402, the depth of each shaft hole 404 is 40mm, the diameter is 30mm, the two small BMM-8 hydraulic motors 403 are installed on each ear picking roller base 115 and provide power sources for the two ear picking rollers 4.

As shown in fig. 6-11, the plant clamping device mainly comprises a left clamping single chain 2, a BMR-80-L hydraulic motor 3 and a right clamping double chain 5. In the left clamping single chain 2, 10 stem-pulling hook links 201 are uniformly distributed on a clamping chain 202, an upper chute seat 203 and a lower chute seat 211 are connected to a connecting seat 111 on a diagonal beam I117 through M12X 45 bolts 207, a sliding block I216 is installed in the upper chute seat 203, the length of a spring I208 is 80mm, one end of the spring I208 is connected with the sliding block I216, the other end of the spring I is sleeved on a M18X 60 bolt 212, a driven gear shaft 215 is welded on the upper surface of the sliding block I216, the diameter of the driven gear shaft is 40mm, the height of the spring I is 60mm, a threaded hole VI 213 is formed on the upper surface of the driven gear shaft 215, the sliding block I216, the spring I208, the M18X 60 bolt 212 and the driven gear shaft 215 form a driven wheel tensioning device, a driven gear 206 is installed on the driven gear shaft 215, a limiting plate 205 is matched with the M8X 32 bolts 204 and is installed on the driven gear shaft 215 to limit the axial movement of the driven gear 206, a sliding block II 217 is installed in the lower chute seat 211, the length of the spring II 209 is 40mm, one end of the spring II is connected with a slide block II 217, the other end of the spring II is sleeved on an M18X 45 bolt 218, the upper surface of the slide block II 217 is welded with a driving chain wheel shaft 214, the diameter of the spring II is 30mm, the height of the spring II is 60mm, the upper surface of the driving chain wheel shaft 214 is provided with a threaded hole VI 213, the slide block II 217, the spring II 209, the M18X 45 bolt 218 and the driving chain wheel shaft 214 form a driving wheel tensioning device, the driving chain wheel shaft 214 is provided with a driving chain wheel 210, a clamping chain 202 is matched with two chain wheels, the transmission ratio i=1.6-2.0 of the two chain wheels is similar to the structure of the left clamping chain 2 when the left clamping chain 2 is overlooked, the clamping chain 202 rotates clockwise, the structure of the right clamping chain 5 is similar to the structure of the left clamping chain 2, the distance between the lower clamping chain 501 and the upper clamping chain 502 is 100mm, the two clamping chains rotate synchronously, the rotation speed is the same as the clamping chain 202, the two BMR-80-L hydraulic motors 3 provide power for the left clamping chain 2 and the right clamping chain 5, two BMR-80-L hydraulic motors 3 are mounted on the hydraulic motor mount II 121, and four M8X132 bolts 301 are used to connect the BMR-80-L hydraulic motors 3.

As shown in fig. 12 and 13, the harvesting device is implemented by a four-bar mechanism 6, a hydraulic motor seat i 110 is arranged on a longitudinal beam ii 108, a BMR-80-L hydraulic motor 3 for driving the four-bar harvesting mechanism to operate is arranged on a longitudinal beam ii 108, a disc 601 is sleeved on an output shaft of the BMR-80-L hydraulic motor 3, the disc 601 is connected with a disc crank 607 through an M6 x 24 bolt 608, power is transmitted to the four-bar harvesting mechanism, the tail end of a harvesting cutter bar 603 and the disc crank 607 form rotary connection by means of a connecting pin 606, the middle part of the cutter bar 603 forms sliding connection with a cutter bar guide rail 602, the cutter bar guide rail 602 forms rotary connection with a guide rail seat 604, the guide rail seat 604 is connected with the longitudinal beam i 105 of the frame 1 through an M6 x 18 bolt 605, and the cutter bar 603 swings left and right under the driving of the disc crank 607, and the corn stalks are cut.

In addition, the bionic mechanism of the invention is embodied in a snapping roll 4 structure and a four-bar mechanism 6 harvesting device, the snapping screw 401 is an involute screw, in the rotation process of the snapping roll 4, corn ears are conveyed from bottom to top, the included angle between the ears and corn stalks is gradually enlarged by the snapping screw 401, and finally, the ear snapping operation is completed, the process simulates the corn picking operation by a human hand, the four-bar mechanism simulates the corn harvesting operation by a human hand-held cutting knife, and the corn stalks are harvested by the left-right swinging of the cutting knife 603 so as to cooperate with the subsequent operation.

Meanwhile, in the snapping rolls 4, the minimum distance between the left snapping roll 4 and the right snapping roll 4 is 35-45 mm, the rotating speed is 120r/min, and the snapping rolls rotate at a low speed so as to avoid damaging corn ears by the snapping rolls; the chain spacing between the left clamping single chain 2 and the right clamping double chain 5 is 0mm, the clamping force is strictly ensured, the three sections of clamping chains are 15-20 mm in spacing, three contact points are formed on the cut corn stalks, and a lever structure is formed for stable clamping; the stem pulling hook 201 is composed of a chain link shaft 2011, a stem pulling curved surface 2012 and a stem pulling hook main body 2013, the stem pulling hook height is 45-50 mm, and the collection and auxiliary clamping of stems are realized; the distance between the cutter 603 and the ground is not more than 130mm, and the cutter 603 performs sharpening treatment, so that corn stalks can be harvested.

The invention is suitable for the comprehensive utilization of banana stalks in banana main producing areas.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (4)

1. The novel bionic snapping roll type sweet corn snapping mechanism is characterized by comprising a frame (1), and a snapping device, a plant clamping device and a harvesting device which are sequentially arranged on the frame (1) from top to bottom, wherein the power is provided by a hydraulic motor;

in the frame (1), two crossbeams I (102) that are parallel to each other and two longitudinal beams I (105) that are parallel to each other around constitute rectangular frame underframe, lateral surface welding otic placode (101) of two crossbeams I (102), otic placode (101) set up the screw hole I (103) that the diameter is 14mm, the cooperation bolt is connected whole mechanism in sweet corn harvester frame, front end longeron I (105) run through screw hole II (106) that set up the diameter is 8mm, two vertical beams I (104) and rectangular frame underframe fixed connection, and the existence contained angle between two vertical beams I (104) is 10 ~20, two vertical beams II (107) weld at two crossbeam I (102) upper surfaces, vertical beam II (107) upper end and longeron II (108) fixed connection, four screw holes III (109) that the diameter is 8mm are evenly set up to the concave circular surface of hydraulic motor seat I (110), two sloping I (117) are arranged in the middle part of frame (1), two sloping I (117) are that the inclined beam I (40 ~ 50) are the diameter is connected with two vertical beams I (111) upper surface welding seat (111) of two vertical beams I (111) that are connected with two vertical beam I (111) upper surface welding seat, two vertical beam I (111) upper end surface connecting seat (111) are provided, six threaded holes IV (112) with the diameter of 12mm are uniformly formed in two sides of a connecting seat (111), three threaded holes IV (112) are formed in each row, two cross beams II (113) which are parallel to each other are fixedly connected to the upper surface of the middle part of each inclined beam I (117), one end of each cross beam II (113) is connected with a triangular longitudinal beam I (114), a snapping roll seat (115) is arranged at one end of each triangular longitudinal beam I (114), a roll center shaft (116) is welded on each snapping roll seat (115), the shaft length is 30mm, a longitudinal beam III (118) is welded between each vertical beam I (104), the distance between the longitudinal beam III (118) and the upper surface of each cross beam I (102) is 400-450 mm, two inclined beams II (119) which are perpendicular to the inclined beams I (117) are welded at the upper ends of the two inclined beams I (117), each inclined beam II (119) is provided with a triangular longitudinal beam II (120) and a hydraulic motor seat II (121), each hydraulic motor seat II (121) is perpendicular to the inclined beam II (119), the concave surface of each hydraulic motor seat II (121) is welded with a roll center shaft (116), the diameter of the concave surface of each snapping roll is 8mm, the distance between two inclined beams (115 mm) is 1000 mm, and the heights of the snapping roll seat is 1000 mm is 150 mm, and the diameter of the snapping roll is 150 mm is matched with the two threaded rolls (122 mm;

the ear picking device consists of two ear picking rollers (4), a bionic ear picking screw (401) is welded on the surface of an ear picking roller shaft (402) of the ear picking roller (4), the ear picking screw (401) simulates a person to pick the sweet corn plants sent by the plant clamping device from top to bottom, the two ear picking screws (401) are uniformly distributed on the ear picking roller shaft (402), shaft holes (404) are formed in two ends of the ear picking roller shaft (402), the depth of the shaft holes (404) is 40mm, the diameter is 30mm, the ear picking screw is installed in cooperation with a roller central shaft (116), and two small BMM-8 hydraulic motors (403) are installed on an ear picking roller seat (115) to provide power sources for the two ear picking rollers (4);

the plant clamping device consists of a left clamping single chain (2), a BMR-80-L hydraulic motor (3) and a right clamping double chain (5), ten stem pulling hooks (201) are uniformly distributed on a clamping chain (202) in the left clamping single chain (2), an upper chute seat (203) and a lower chute seat (211) are connected to a connecting seat (111) on an inclined beam I (117) through M12X 45 bolts (207), a sliding block I (216) is arranged in the upper chute seat (203), the length of a spring I (208) is 80mm, one end of the spring I is connected with the sliding block I (216), the other end of the spring I is sleeved on an M18X 60 bolt (212), a driven sprocket shaft (215) is welded on the upper surface of the sliding block I (216), the diameter of the driven sprocket shaft is 40mm, the height of the driven sprocket shaft is 60mm, a threaded hole VI (213) is formed in the upper surface of the driven sprocket shaft (215), the sliding block I (216), the spring I (208), the M18X 60 bolts (212) and the driven sprocket shaft (215) form a driven sprocket tensioning device, a driven sprocket (206) is arranged on the driven sprocket shaft (215), a limiting plate (205) is matched with the M8X 60 bolts (204), the driven sprocket shaft (206) and the driven sprocket shaft (215) is arranged in the axial direction, the sliding block II (218) is limited by the sliding block II (218) and the other end of the driven sprocket shaft (23) is axially, the upper surface of the sliding block II (217) is welded with a driving chain wheel shaft (214), the diameter of the driving chain wheel shaft is 30mm, the height of the driving chain wheel shaft is 60mm, the upper surface of the driving chain wheel shaft (214) is provided with a threaded hole VI (213), the sliding block II (217), a spring II (209), M18X 45 bolts (218) and the driving chain wheel shaft (214) form a driving wheel tensioning device, the driving chain wheel (210) is arranged on the driving chain wheel shaft (214), a clamping chain (202) is matched with two chain wheels, the driving chain wheel (210) and a driven chain wheel (206) have a transmission ratio i=1.6-2.0, the left clamping single chain (2) is overlooked, the clamping chain (202) rotates clockwise, the lower clamping chain (501) and the upper clamping chain (502) of the right clamping double chain (5) rotate synchronously, the rotating speeds of the two clamping chains are the same as the clamping chain (202), the two BMR-80-L hydraulic motors (3) provide power for the left clamping single chain (2) and the right clamping double chain (5), the two BMR-80-L hydraulic motors (3) are arranged on a motor seat (121) and are connected with the BMR-80-L hydraulic motors (301) by four M8X 32 hydraulic motors;

the corn harvesting device is characterized in that harvesting of corn stalks is completed by a four-bar harvesting mechanism (6), a hydraulic motor seat I (110) is arranged on a longitudinal beam II (108) and used for installing a BMR-80-L hydraulic motor (3) for driving the four-bar harvesting mechanism to operate, a disc (601) is sleeved on an output shaft of the BMR-80-L hydraulic motor (3), the disc (601) is connected with a disc crank (607) through a M6X 24 bolt (608) and transmits power to the four-bar harvesting mechanism, the tail end of a cutter bar (603) is rotationally connected with the disc crank (607) through a connecting pin (606), the middle part of the cutter bar (603) is in sliding connection with a cutter bar guide rail (602), the cutter bar guide rail (602) is rotationally connected with the guide rail seat (604), the guide rail seat (604) is connected with a longitudinal beam I (105) of a frame (1) through a M6X 18 bolt (605), and the cutter bar (603) swings left and right under the driving of the disc crank (607);

the ear picking screw (401) is an involute screw, corn ears are conveyed from bottom to top in the rotation process of the ear picking roller (4), the included angle between the corn ears and corn stalks is gradually enlarged by the ear picking screw (401), finally, the ear picking operation is finished, a four-rod harvesting mechanism simulates a human hand-held cutter to harvest corn, and a cutter bar (603) swings left and right to harvest corn stalks;

in the snapping rolls (4), the minimum distance between the left snapping roll and the right snapping roll (4) is 35-45 mm, and the rotating speed is 120r/min.

2. The novel bionic snapping roll type sweet corn snapping mechanism according to claim 1, wherein the chain spacing between the left clamping single chain (2) and the right clamping double chain (5) is 0mm, the three-section clamping chain spacing is 15-20 mm, three contact points are formed on cut corn stalks, and a lever structure is formed for stable clamping.

3. The novel bionic snapping roll type sweet corn snapping mechanism according to claim 1, wherein the stem pulling hook (201) comprises a chain link shaft (2011), a stem pulling curved surface (2012) and a stem pulling hook main body (2013), and the stem pulling hook is 45-50 mm in height.

4. The novel bionic snapping roll type sweet corn snapping mechanism according to claim 1, wherein the distance between the cutter bar (603) and the ground is not more than 130mm, and the cutter bar (603) is subjected to sharpening.

Images