CN113455176A

CN113455176A - Knocking type low impurity content sunflower seed and melon seed combined harvester

Info

Publication number: CN113455176A
Application number: CN202110757924.6A
Authority: CN
Inventors: 唐忠; 丁翰韬; 陈树人; 林圣博; 李娜
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2021-10-01

Abstract

The invention provides a knocking type low-impurity-content sunflower seed and sunflower seed combined harvester which comprises a picking and conveying device, a first conveying system, a knocking threshing device, a second conveying system, a flower disc collecting and discharging device, a sunflower seed bin, a traveling system and a main frame, wherein the picking and conveying device is arranged on the main frame; the picking and conveying device is arranged on the main frame; the knocking threshing device is positioned above the second conveying system and comprises a lifting rod, a cam mechanism, a cross rod, a supporting rod, a fixed hinge and a knocking plate; a lever fulcrum is arranged in the middle of the cross rod, one end of the cross rod is hinged with the lifting rod, the other end of the cross rod is provided with a supporting rod, and the knocking plate is arranged on the supporting rod through a fixed hinge; the feed bin includes flower disc collection discharging equipment and melon seed feed bin that separate each other, and discharge equipment is located the second conveying system rear is collected to the flower disc, and the melon seed feed bin is located the second conveying system below. The invention reduces the labor intensity of workers, has certain stability, reliability and low failure rate, realizes the low impurity content harvest of the sunflower and improves the grain phase.

Description

Knocking type low impurity content sunflower seed and melon seed combined harvester

Technical Field

The invention relates to the field of sunflower disc harvesting equipment, in particular to a knocking type low-impurity-content sunflower seed and sunflower seed combined harvester.

Background

The sunflower is an economic crop with excellent quality, is one of main oil crops in China, has wide market potential, and is widely applied to the fields of food processing industry, chemical industry, agriculture and animal husbandry and the like. Through the development of many years, the planting area of the Chinese sunflower has leaped the world first. However, for the harvest of the sunflower, most of the areas still use manual harvest as the main part at present, the labor intensity is high, the production efficiency is low, and the problems of large seed loss, high impurity content and serious roller abrasion of the sunflower harvester used in a small part of areas exist, so that the mechanized harvest of the sunflower is severely limited.

At present, aiming at the harvest and threshing of sunflower, the prior art discloses a sunflower cake combine harvester, which provides a sunflower cake combine harvester, wherein a plurality of pointed row dividers which are arranged at equal intervals are utilized to cut a sunflower disc, and then threshing is carried out by a currently sold thresher, so that the harvest of sunflower cakes is realized; the prior art discloses a direct-grain sunflower seed grain harvester with inserted discs, which feeds a sunflower disc into a sunflower disc supporting plate through a seedling dividing device and a driving plate device, and then performs threshing by using a threshing brush of a threshing device to rotate; aiming at a threshing method of sunflower seeds, the prior art discloses a sunflower seed harvester, wherein a threshing mechanism comprises a plate tooth roller and an axial flow roller, and threshing and separation are completed through the spiral motion of the roller; the prior art discloses a threshing harvester for edible sunflower, wherein harvesting and threshing are carried out through an edible sunflower crushing device, an input edible sunflower disc is crushed by a crushing roller, and fragments and grains are conveyed to a storage bin together to realize the harvesting of the edible sunflower.

The above techniques all propose methods and equipment designs for harvesting and threshing of sunflower, most of the existing harvesters use the threshing cylinder or the crushing roller for threshing, but because of the particularity of sunflower seed growth, damage to flower discs can cause high impurity rate, and damage to seed quality is not beneficial to seed cleaning, so that the benefits of vast farmers are damaged.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a knocking type low impurity rate sunflower seed combined harvester which is provided with a high-efficiency low-damage threshing, picking and conveying, collecting and discharging device, the general sunflower seed harvester can complete the operations of picking and conveying, threshing, collecting and discharging and the like, the labor intensity is reduced, and the knocking type low impurity rate sunflower seed combined harvester has certain stability, reliability and low failure rate, realizes the low impurity rate harvesting of sunflower seeds, and improves the grain phase.

The present invention achieves the above-described object by the following technical means.

A knocking type low impurity content sunflower seed and melon seed combined harvester comprises a picking and conveying device, a first conveying system, a knocking and threshing device, a second conveying system, a flower disc collecting and discharging device, a sunflower seed bin, a traveling system and a main frame;

the main frame is arranged on the walking system, and the picking and conveying device is arranged on the main frame through a lifting support rod and is used for enabling the sunflower discs to enter the first conveying system; the sunflower discs can sequentially enter the bin through the first conveying system and the second conveying system; the knocking threshing device is positioned above the second conveying system and comprises a lifting rod, a cam mechanism, a cross rod, a supporting rod, a fixed hinge and a knocking plate; a lever fulcrum is arranged in the middle of the cross rod and supported on the main rack above the second conveying system, one end of the cross rod is hinged with the lifting rod, a support rod is arranged at the other end of the cross rod, and the other end of the cross rod can move along the support rod; the knocking plate is arranged on the supporting rod through a fixed hinge; the lifting rod is driven to do reciprocating linear motion through the cam mechanism, so that the knocking plate can knock the sunflower disc on the second conveying system in a reciprocating mode;

the bin comprises a flower disc collecting and discharging device and a melon seed bin which are separated from each other, and the flower disc collecting and discharging device is positioned behind the second conveying system and used for collecting the threshed sunflower discs; the sunflower seed bin is located below the second conveying system and used for collecting sunflower seeds.

Further, strike thresher still includes the spring of unloading, unload power spring one end and fix on the whipping arm, unload the power spring other end and fix on knocking the board, play the resilience after hitting and unload the power effect.

Further, the flower disc collecting and discharging device comprises a box cover rotating hinge, a liftable box cover, a locking buckle, a box body supporting hydraulic rod and a flower disc collecting box body; one end of the box body supporting hydraulic rod is fixed on the main rack, and the other end of the box body supporting hydraulic rod is fixed on the disc chuck collecting box body; the liftable box cover is connected with the flower disc collecting box body through a box cover rotating hinge; and two ends of the locking buckle are fixed on the flower disc collecting box body and used for locking the liftable box cover.

Further, the second conveying system comprises a driving motor, a conveying belt, a driving wheel, a supporting wheel and a driven wheel; a plurality of supporting wheels are arranged between the driving wheel and the driven wheel and used for providing supporting points for beating the sunflower disc; the driving motor is used for driving the driving wheel; the surface of the conveying belt is in a grid shape and is used for loading and striking the dropped sunflower seeds.

Furthermore, a plurality of square grids are uniformly distributed on the surface of the conveying belt, and the depth of each square grid is not more than 0.5 time of the thickness of the conveying belt.

Furthermore, the melon seed storage bin also comprises a melon seed blanking guide plate and a vibrating screen; the vibrating screen is positioned in the middle of the sunflower seed bin and used for cleaning sunflower seeds; melon seed feed bin entrance is equipped with melon seed blanking guide plate for guide sunflower seeds to shale shaker.

Further, the melon seed blanking guide plate comprises a fixed side plate, a bottom plate and guide strips; a plurality of fixed side plates are welded on two sides of the bottom plate, and a plurality of flow guide strips are welded on the bottom plate; the fixed side plate is fixed at the inlet of the melon seed bin.

Further, leave 8 ~ 12 cm's clearance between discharge apparatus is collected to second conveying system and flower disc for make sunflower seeds fall into the melon seed feed bin from the clearance, and the sunflower disc can pass the clearance and get into the flower disc and collect discharge apparatus.

The invention has the beneficial effects that:

1. the invention relates to a knocking type low impurity content sunflower seed combine harvester, which aims at solving the problems of high impurity content and damage to seed phase when the sunflower seeds are harvested and threshed, and is different from the commonly used principle of flower disc crushing and threshing through a threshing cylinder or a crushing roller. The damage of the grain phase caused by crushing and threshing is reduced while a large amount of stalk chips are avoided after the flower disc is crushed and threshed.

2. The knocking type low impurity content sunflower seed combined harvester is designed aiming at the sunflower disc threshing problem, a knocking threshing device is designed, the manual knocking threshing process is simulated, the inertia force generated by knocking the flower disc by the knocking plate is utilized, the separation of seeds and the flower disc is realized, the flower disc is prevented from generating a large amount of broken impurities, and the cleaning operation workload is greatly reduced.

3. The knocking type low-impurity-content sunflower seed combined harvester is characterized in that a picking and conveying device is designed aiming at the feeding problem of sunflower discs, the grain surfaces of the fed sunflower discs are upwards conveyed by utilizing the limitation of a disc chuck partition plate and a feeding disc chuck cover plate, meanwhile, a rectangular groove is formed in the rear portion of a back plate to enable the disc chuck to fall into a first conveying system, and a stepped conveying belt is adopted to realize the ordered lifting and conveying of the sunflower discs.

4. According to the knocking type low-impurity-content sunflower seed combine harvester, the flower disc collecting and discharging device is designed to be 8-10 cm away from the second conveying system aiming at the separation problem of seeds and sunflower discs, the seeds at the tail end of the conveying process fall from the gap, the sunflower discs rotate along the conveying belt and fall into the collecting device along the inclination angle of the flower disc collecting and discharging device, and the effective separation of the flower discs and the seeds is realized.

5. According to the knock-type low impurity rate sunflower seed and sunflower seed combined harvester, a sunflower seed blanking guide plate is designed on the upper portion of the vibrating screen aiming at the seed cleaning problem, so that the accumulation problem possibly caused by a large amount of seeds falling into a storage bin is avoided, meanwhile, the shunting and decelerating of a large amount of seeds are realized, the speed of falling into the vibrating screen is reduced, the cleaning capacity of the vibrating screen can be improved, and the seed cleaning efficiency is improved.

6. The knocking type low-impurity-content sunflower seed combined harvester is provided with a flower disc collecting and discharging device aiming at the problem that a large number of flower discs are accumulated after harvesting and threshing, when the flower discs are accumulated in a large number after threshing, a box body can be lifted by a certain angle through a box body supporting hydraulic rod, and meanwhile, a box cover capable of being lifted is lifted by loosening a locking buckle, so that the flower discs are toppled, the carrying capacity of the harvester is improved, and the long-time operation capacity of the harvester is improved.

Drawings

FIG. 1 is a general view of the knocking type low impurity rate sunflower seed combine harvester of the invention.

Fig. 2 is a schematic view of the pickup and transfer device according to the present invention.

Fig. 3 is a schematic view of the melon seed blanking guide plate of the invention.

Fig. 4 is a front and top view of a second conveyor system according to the invention.

Fig. 5 is a schematic view of a first delivery system according to the present invention.

Fig. 6 is a schematic view of a threshing strike apparatus according to the present invention.

Fig. 7 is a view of the knocking threshing device according to the present invention from direction a.

Fig. 8 is a schematic view of a disc chuck collecting and discharging device according to the present invention.

Fig. 9 is a partial cross-sectional view of a second conveyor system drive belt according to the invention.

In the figure:

1-a pick-up transport device; 101-a transmission channel housing; 102-a drive wheel cover plate; 103-feeding faceplate cover plate; 104-a faceplate pick-up claw; 105-a faceplate divider plate; 106-side plate; 107-a back plate; 2-a cab; 3-a first conveying system; 301-driven wheel; 302-step conveyor belt; 303-driving wheel; 4-knocking threshing device; 401-lifting lever; 402-a roller; 403-a rotating cam; 404-a drive shaft; 405-a tapping plate; 406-a fixed hinge; 407-a force-relief spring; 408-a support bar; 409-a cross bar; 5-a second conveying system; 501-driving a motor; 502-a conveyor belt; 503-a driving wheel; 504-support wheels; 505-a driven wheel; 6-melon seed blanking guide plate; 601-fixing the side plate; 602-a guide strip; 7-vibrating screen; 8-a disc chuck collecting and discharging device; 801-case lid swivel hinge; 802-lift the lid; 803-locking the buckle; 804-the tank supports the hydraulic rod; 805-a faceplate collection box; 9-melon seed storage bin; 10-a walking system and 11-a main frame.

Detailed Description

The invention will be further described with reference to the following figures and specific examples, but the scope of the invention is not limited thereto.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, the knocking type low impurity rate sunflower seed combine harvester comprises a picking and conveying device 1, a cab 2, a first conveying system 3, a knocking threshing device 4, a second conveying system 5, a flower disc collecting and discharging device 8, a sunflower seed bin 9, a traveling system 10 and a main frame 11; the walking system 10 is provided with a main frame 11, and the picking and conveying device 1 is arranged on the main frame 11 through a lifting support rod and is used for enabling the sunflower discs to enter the first conveying system 3; the cab 2 is arranged on the main frame 11; the sunflower discs can sequentially enter the bin through the first conveying system 3 and the second conveying system 5;

as shown in fig. 6 and 7, the rapping threshing device 4 is located above the second conveying system 5, and the rapping threshing device 4 comprises a lifting rod 401, a roller 402, a rotating cam 403, a transmission shaft 404, a force-releasing spring 407, a cross rod 409, a support rod 408, a fixed hinge 406 and a rapping plate 405; a lever fulcrum is arranged in the middle of the cross rod 409 and supported on the main frame 11 above the second conveying system 5, one end of the cross rod 409 is hinged with the lifting rod 401, a supporting rod 408 is installed at the other end of the cross rod 409, and the other end of the cross rod 409 can move along the supporting rod 408; the rotating cam 403 is arranged on the transmission shaft 404, and the other end of the transmission shaft 404 is provided with a motor to drive the transmission shaft 404 to rotate; the roller 402 is arranged on the lifting rod 401 and rolls in contact with the rotating cam 403; the knocking plate 405 is mounted on a supporting rod 408 through a fixed hinge 406; the lifting rod 401 is driven to do reciprocating linear motion through the rotating cam 403, so that the knocking plate 405 can knock the sunflower disc on the second conveying system 5 in a reciprocating mode; one end of the force-discharging spring 407 is fixed on the cross bar 409, and the other end of the force-discharging spring 407 is fixed on the knocking plate 405, and plays a role in rebounding and discharging force after being hit. The bin comprises a flower disc collecting and discharging device 8 and a melon seed bin 9 which are separated from each other, wherein the flower disc collecting and discharging device 8 is positioned behind the second conveying system 5 and is used for collecting the threshed sunflower discs; the melon seed bin 9 is positioned below the second conveying system 5 and used for collecting sunflower seeds.

As shown in fig. 2, the pickup conveying device 1 includes a driving wheel cover plate 102, a feeding faceplate cover plate 103, a faceplate pickup claw 104, a faceplate separation plate 105, a side plate 106 and a back plate 107; the faceplate picking claw 104 is supported on a frame of the first conveying system 3, side plates 106 are arranged on two sides of the faceplate picking claw 104, a back plate 107 is arranged on the rear side of the faceplate picking claw 104, the driving wheel cover plate 102 is arranged above the side plates 106, and the driving wheel cover plate 102 is used for covering a driven wheel 301 of the first conveying system 3; a feeding faceplate cover plate 103 is arranged above the faceplate pick-up claw 104 and used for preventing the sunflower plate from turning over after feeding, and keeping one end with seeds upward; clamping grooves are formed in the chuck picking claws 104, the gaps of the clamping grooves are 20-30 cm, and chuck separating plates 105 are arranged on two sides of each clamping groove and used for fixedly supporting the upward feeding of the chuck seed faces; the backplate 107 lower part is opened there is the rectangular channel that highly is 8 ~ 12cm for the sunflower disk is through feeding to first conveying system 3, plays restriction sunflower disk upset effect.

As shown in fig. 5, the first conveying system 3 includes a driven pulley 301, a step conveyor belt 302, and a driving pulley 303; two ends of the ladder conveyor belt 302 are sleeved on the driven wheel 301 and the driving wheel 303; the end of the driving wheel 303 of the first conveying system 3 is close to the end of the driven wheel 505 of the second conveying system 5; the end of the driven wheel 301 of the first conveying system 3 is close to the back plate 107 of the pick-up and conveying device 1.

As shown in fig. 4 and 9, the second conveying system 5 includes a driving motor 501, a conveying belt 502, a driving wheel 503, a supporting wheel 504, and a driven wheel 505; the end of the driven wheel 505 of the second conveying system 5 is close to the end of the driving wheel 303 of the first conveying system 3; a plurality of supporting wheels 504 are arranged between the driving wheel 503 and the driven wheel 505; two ends of the conveying belt 502 are respectively sleeved on the driving wheel 503 and the driven wheel 505, and the middle part of the conveying belt is supported by the supporting wheel 504; the driving motor 501 is installed on the side surface of the second conveying system 5 and drives the driving wheel 503 to rotate; conveyer belt 502 surface is latticed for load and hit the sunflower seeds that drop, can also make during the sunflower disk lower part pointed end can block into the net, the flower disc takes place the upset when preventing to hit. As shown in fig. 9, a plurality of square grids are uniformly distributed on the surface of the conveyor belt 502, and the depth of each square grid is not more than 0.5 time of the thickness of the conveyor belt 502.

As shown in fig. 8, the disc chuck collecting and discharging device 8 includes a cover rotating hinge 801, a liftable cover 802, a locking buckle 803, a case supporting hydraulic rod 804, and a disc chuck collecting case 805; one end of the box body supporting hydraulic rod 804 is fixed on the main frame 11, and the other end of the box body supporting hydraulic rod is fixed on the disc chuck collecting box body 805; the liftable box cover 802 is connected with the flower disc collecting box body 805 through a box cover rotating hinge 801; the two ends of the locking buckle 803 are fixed on the flower disc collecting box 805, and the locking buckle plays a role in fixing or loosening the liftable box cover 802.

As shown in fig. 3, the melon seed storage bin 9 further comprises a melon seed blanking guide plate 6 and a vibrating screen 7; the vibrating screen 7 is positioned in the middle of the sunflower seed bin 9 and used for cleaning sunflower seeds; 9 entrances of the melon seed bin are provided with melon seed blanking guide plates 6 for guiding sunflower seeds to the vibrating screen 7. The melon seed blanking guide plate 6 comprises a fixed side plate 601, a bottom plate and guide strips 602; a plurality of fixed side plates 601 are welded on two sides of the bottom plate, and a plurality of guide strips 602 are welded on the bottom plate; the fixed side plate 601 is fixed at the inlet of the melon seed bin 9.

The invention relates to a knocking type low impurity content sunflower seed combine harvester, which aims at the problems of high impurity content and damage to seed phase when sunflower is harvested and threshed, and is different from the commonly used principle of flower disc crushing and threshing through a threshing cylinder or a crushing roller. When having avoided the flower disc breakage to thresh the back and produce a large amount of stalk piece pieces, also reduced the broken seed grain that threshes and cause and have impaired mutually, the artifical threshing process that strikes of simulation utilizes to strike the board and strikes the inertial force that the flower disc produced, realizes the separation of seed grain and flower disc, guarantees that the flower disc does not produce a large amount of broken impurity, reduces to a great extent and cleans the operation work load.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A knocking type low impurity content sunflower seed and melon seed combined harvester is characterized by comprising a picking and conveying device (1), a first conveying system (3), a knocking and threshing device (4), a second conveying system (5), a flower disc collecting and discharging device (8), a sunflower seed bin (9), a walking system (10) and a main frame (11);

the walking system (10) is provided with a main frame (11), and the picking and conveying device (1) is arranged on the main frame (11) through a lifting support rod and used for enabling the sunflower discs to enter the first conveying system (3); the sunflower discs can sequentially enter the bin through a first conveying system (3) and a second conveying system (5); the knocking threshing device (4) is positioned above the second conveying system (5), and the knocking threshing device (4) comprises a lifting rod (401), a cam mechanism, a cross rod (409), a supporting rod (408), a fixed hinge (406) and a knocking plate (405); a lever fulcrum is arranged in the middle of the cross rod (409), the fulcrum is supported on the main frame (11) above the second conveying system (5), one end of the cross rod (409) is hinged with the lifting rod (401), a supporting rod (408) is installed at the other end of the cross rod (409), and the other end of the cross rod (409) can move along the supporting rod (408); the knocking plate (405) is arranged on the supporting rod (408) through a fixed hinge (406); the lifting rod (401) is driven to do reciprocating linear motion through a cam mechanism, so that the knocking plate (405) can knock the sunflower disc on the second conveying system (5) in a reciprocating mode;

the bin comprises a flower disc collecting and discharging device (8) and a melon seed bin (9) which are separated from each other, and the flower disc collecting and discharging device (8) is positioned behind the second conveying system (5) and used for collecting the threshed sunflower discs; the sunflower seed bin (9) is located below the second conveying system (5) and used for collecting sunflower seeds.

2. The knock-type low-impurity-content sunflower seed combine harvester according to claim 1, wherein the knock-type threshing device (4) further comprises a force unloading spring (407), one end of the force unloading spring (407) is fixed on the cross bar (409), the other end of the force unloading spring (407) is fixed on the knock plate (405), and the force unloading spring plays a role in rebounding after being hit.

3. The knock-type low-impurity-content sunflower seed combine harvester according to claim 1, wherein the disc chuck collecting and discharging device (8) comprises a box cover rotating hinge (801), a liftable box cover (802), a locking buckle (803), a box body supporting hydraulic rod (804) and a disc chuck collecting box body (805); one end of the box body supporting hydraulic rod (804) is fixed on the main rack (11), and the other end of the box body supporting hydraulic rod (804) is fixed on the disc chuck collecting box body (805); the liftable box cover (802) is connected with the flower disc collecting box body (805) through a box cover rotating hinge (801); and two ends of the locking buckle (803) are fixed on the flower disc collecting box body (805) and used for locking the liftable box cover (802).

4. The knocking type low-impurity-content sunflower seed and melon seed combine harvester according to claim 1, wherein the second conveying system (5) comprises a driving motor (501), a conveying belt (502), a driving wheel (503), a supporting wheel (504) and a driven wheel (505); a plurality of supporting wheels (504) are arranged between the driving wheel (503) and the driven wheel (505) and are used for providing supporting points for beating the sunflower disc; the driving motor (501) is used for driving a driving wheel (503); the surface of the conveying belt (502) is in a grid shape and is used for loading and striking the dropped sunflower seeds.

5. The knocking type low impurity rate sunflower seed and melon seed combine harvester according to claim 4, wherein a plurality of square grids are uniformly distributed on the surface of the conveying belt (502), and the depth of each square grid is not more than 0.5 time of the thickness of the conveying belt (502).

6. The knocking type low-impurity-content sunflower seed and melon seed combined harvester according to claim 1, characterized in that a melon seed blanking guide plate (6) and a vibrating screen (7) are further arranged in the melon seed bin (9); the vibrating screen (7) is positioned in the middle of the sunflower seed bin (9) and is used for cleaning sunflower seeds; melon seed feed bin (9) entrance is equipped with melon seed blanking guide plate (6) for guide sunflower seeds to shale shaker (7).

7. The knocking type low impurity rate sunflower seed and melon seed combined harvester according to claim 6, wherein the melon seed blanking guide plate (6) comprises a fixed side plate (601), a bottom plate and a guide strip (602); a plurality of fixed side plates (601) are welded on two sides of the bottom plate, and a plurality of guide strips (602) are welded on the bottom plate; the fixed side plate (601) is fixed at the inlet of the melon seed bin (9).

8. The knocking type low-impurity-content sunflower seed and sunflower seed combined harvester according to claim 1, characterized in that a gap of 8-12 cm is reserved between the second conveying system (5) and the disk chuck collecting and discharging device (8) and used for enabling sunflower seeds to fall into a sunflower seed bin (9) from the gap, and the sunflower disks can pass through the gap to enter the disk chuck collecting and discharging device (8).