Self-propelled cyperus esculentus combine harvester

Abstract

The invention discloses a self-propelled cyperus esculentus combine harvester, which belongs to the technical field of agricultural machinery, and comprises a vehicle body, and the front end of the vehicle body is connected with an excavation table; a conveying plate chain is arranged on the excavating table, and the rear end of the conveying plate chain is in butt joint with a lifting chain mechanism fixedly connected to the vehicle body. The rear end of the lifting chain mechanism extends into the front part of the screen drum; a rotatable rotating shaft is arranged in the center of the screen drum; the rotating shaft is connected with a plurality of grass guide sheets and a plurality of throwing ropes; below the screen drum, the vehicle body is connected with a vibrating screen capable of swinging back and forth; the outlet end of the fruit and bean elevator is located above a storage bin fixedly connected to the vehicle body. And a plurality of small sieve holes are formed in the collecting plate, a chain plate belt of the conveying plate chain and a chain plate belt of the lifting chain mechanism. Under the condition that the space of the self-propelled vehicle body is limited, the mandulapalka harvester comprises five stages of screening mechanisms, has strong soil screening capacity, can effectively screen out soil blocks carried by mandulapalka root hairs, and improves the mandulapalka harvesting efficiency and quality.

Description

Technical Field

[0001] The invention belongs to the technical field of root crop harvesting and relates to a self-propelled cyperus juncea combine harvester. Background Art

[0002] Cyperus oleiferus, also known as cyperus oleiferus, tiger nut, iron water chestnut, etc., is an annual herbaceous plant of the Cyperaceae family. It has leaves on the ground and fruits underground. The fruit is a granular tuber, yellow-brown in color, similar in shape and size to yam fruit. It is a new agricultural product with extremely high comprehensive benefits. Cyperus oleiferus is a treasure from head to toe. It is easy to plant and manage, but difficult to harvest. Cyperus oleiferus fruits are attached to fibrous roots, and when mature, they are distributed in the soil layer 50 to 100 mm from the ground. When harvesting cyperus oleiferus manually, the cyperus oleiferus plant needs to be pulled out by hand, and a large amount of soil blocks are attached to its fibrous roots at this time. If cyperus oleiferus is harvested manually, 40% of its sales are occupied by the harvesting cost, and the economic benefits of cyperus oleiferus planting are greatly reduced. The main problem restricting the large-scale planting of cyperus oleiferus is that mechanical harvesting is difficult and inefficient. Summary of the invention

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a self-propelled cyperus chinensis combine harvester, the purpose of which is to achieve low-loss excavation, efficient screening, cleaning and separation, and fruit collection. The device has the advantages of low fruit damage rate, clean cleaning, and high harvesting efficiency.

[0004] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions.

[0005] A self-propelled cyperus oleifera combine harvester comprises a vehicle body capable of autonomous movement, the front end of the vehicle body being connected to a digging platform for digging out a bean-soil mixture containing cyperus oleifera and soil blocks; a conveying plate chain is provided on the digging platform, the rear end of which is butted against an elevating chain mechanism fixedly connected to the vehicle body, for conveying the bean-soil mixture to the elevating chain mechanism via the conveying plate chain; the rear end of the elevating chain mechanism extends into the front part of a screen drum, for conveying the bean-soil mixture to the screen drum; a rotatable shaft is provided at the center of the screen drum; a plurality of grass guide blades and a plurality of throwing ropes are connected to the shaft, the throwing ropes being used to beat the fruit beans and rhizomes of the cyperus oleifera to separate them when the shaft rotates, and the grass guide blades being used to push the rhizomes to move toward the rear end of the screen drum when the shaft rotates; a plurality of evenly distributed large sieve holes are provided on the wall of the screen drum, for the fruit beans to fall under the screen drum; under the screen drum, the vehicle body is connected to a A vibrating screen that can swing back and forth is connected; a plurality of evenly distributed small sieve holes are opened at the front of the vibrating screen, and a plurality of evenly distributed large sieve holes are opened at the rear thereof; a guide plate with a bottom end that is fixedly connected to the vibrating screen and tilted forward is located below the vibrating screen and corresponds to the position of the small sieve holes of the vibrating screen, and is used to receive impurities that fall from the small sieve holes of the vibrating screen and discharge them out of the vehicle; a collecting plate with a bottom end that is fixedly connected to the vibrating screen and tilted forward has a rear end that is located below the large sieve holes of the vibrating screen, and a front end that is located below the guide plate and corresponds to the top of the receiving trough of the fruit bean elevator, and is used to collect the fruit beans that fall from the large sieve holes of the vibrating screen and collect them into the fruit bean elevator; the outlet end of the fruit bean elevator is located above the storage bin that is fixedly connected to the vehicle body, and is used to transport the fruit beans to the storage bin; a plurality of small sieve holes are opened on the collecting plate, the chain plate belt of the conveying plate chain, and the chain plate belt of the lifting chain mechanism, and are used to screen out soil mixed in the fruit beans.

[0006] As a further optimization, it also includes a cleaning fan fixedly connected to the lower part of the vehicle body; the air outlet of the cleaning fan is located below the front end of the vibrating screen and faces the small screen holes of the vibrating screen. As a further optimization, the upper end of the vibrating screen is fixedly connected to a plurality of sawtooth plates evenly spaced left and right; the length of the sawtooth plates is the same as that of the vibrating screen, and the tooth tips thereof face backwards.

[0007] As a further optimization, the outer wall of the screen drum is fixedly connected to a gear ring, the gear ring is meshingly connected to a gear arranged on the vehicle body, the gear is connected to a drive motor for driving the screen drum to rotate; the rotation direction of the screen drum is opposite to the rotation direction of the rotating shaft.

[0008] As a further optimization, a grass cutting knife is connected to the rear of the rotating shaft.

[0009] As a further optimization, the grass cutting knife is fixedly connected to a sleeve, the sleeve is sleeved on the rotating shaft, and one end of the sleeve is connected to a motor fixed on the vehicle body through a chain transmission mechanism.

[0010] As a further optimization, the area of ​​the small mesh area of ​​the vibrating screen accounts for three quarters of the total area of ​​the vibrating screen; correspondingly, the area of ​​the large mesh area of ​​the vibrating screen accounts for one quarter of the total area of ​​the vibrating screen.

[0011] As a further optimization, the small sieve holes are oblong holes; and the large sieve holes are round holes.

[0012] As a further optimization, baffles are respectively provided on the left and right sides of the screen cylinder, and the baffles are fixedly connected to the vehicle body to prevent fruit beans from falling outside the vibrating screen.

[0013] As a further optimization, the upper rear end of the excavating platform is hinged to the vehicle body, and the lower part is hinged to the cylinder, and the other end of the cylinder is hinged to the vehicle body, for controlling the digging depth at the front end of the excavating platform by extending and retracting the cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are: under the condition of limited space of the self-propelled vehicle body, the present invention includes at least five-level screening mechanisms, has a strong soil screening ability, can effectively screen out the soil blocks and stems carried by the cyperus juncea, and improve the efficiency and quality of the cyperus juncea harvest. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the whole machine of an embodiment of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the digging platform and the lifting chain mechanism connected to each other in an embodiment of the present invention;

[0017] Figure 3 A schematic structural diagram of an excavation platform according to an embodiment of the present invention;

[0018] Figure 4 It is a schematic structural diagram of a screen drum according to an embodiment of the present invention;

[0019] Figure 5 It is a structural schematic diagram of the central rotating mechanism of an embodiment of the present invention;

[0020] Figure 6 It is a schematic structural diagram of a fruit soil cleaning device and a fruit collecting device according to an embodiment of the present invention.

[0021] The correspondence between the technical features and the reference numerals in the figure is: vehicle driving system 1; excavation and transportation system 2; root and fruit separation device 3; fruit and soil cleaning device 4; fruit collecting device 5; frame 6; rotary tillage device 7; conveyor plate chain 8; primary collecting device 9; lifting chain mechanism 10; transmission device 11; lifting arm 12; cylinder 13; rotary tillage blade pair 14; soil feeding shovel 15; rotating shaft 16; soil collecting shell 17; chain plate belt 18; transmission mechanism 19; triangular vibration shaft 20; central rotating mechanism 21; screen drum 22; rotating shaft 23; grass guide blade 24; throwing rope 25; grass cutting blade 26; guide plate 28; collecting plate 29; vibrating screen 30; eccentric rocker 31; cleaning fan 32; secondary collecting device 33; fruit bean elevator 34; storage bin 35; angle sensor 36; displacement sensor 37; torque sensor 38; control device 39. DETAILED DESCRIPTION

[0022] The present invention is described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some preferred embodiments of the present invention, rather than all embodiments. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-6 In this embodiment, the vehicle body is forward. A self-propelled cyperus rotundus combine harvester comprises a vehicle driving system 1, an excavation and transportation system 2, a root-fruit separation device 3, a fruit-soil cleaning device 4 and a fruit collection device 5. The coordinated operation of multiple modules forms an efficient and sustainable combine harvesting equipment system.

[0024] The vehicle driving system 1, i.e. the vehicle body including the cockpit, chassis system and power system, is the key to the development of self-propelled harvesters.

[0025] The excavation and transportation system 2 includes an excavation platform, a frame 6, a rotary tillage device 7, a conveyor plate chain 8, a primary collection device 9, a lifting chain mechanism 10 and a transmission device 11. The frame 6 is used to fix and connect the rotary tillage device 7, the conveyor plate chain 8, the primary collection device 9, etc. A lifting arm 12 is fixedly arranged at the upper end of the frame 6. The front end of the lifting arm 12 is hinged to the conveyor plate chain 8 through a lifting shaft, so that the lifting shaft can be replaced after being broken or damaged as a safety part, thereby protecting the life and reliability of the frame 6. The lower end of the lifting arm 12 is hinged to the oil cylinder 13, which is used to provide driving force to the lifting arm 12, so as to realize the lifting or falling of the front end device. The frame 6 is connected to the rotary tillage device 7 for excavating the working area; the conveyor plate chain 8 is installed in the middle position of the frame 6 for conveying the bean-soil mixture crushed by the rotary tillage device 7 to the rear end of the harvester, and the chain plate belt 18 with small sieve holes of the conveyor plate chain 8 is used for preliminary screening of the soil. The bean-soil mixture after the initial screening is transported to the primary collecting device 9 by the conveyor plate chain 8. The auger in the device makes the bean-soil mixture move toward the center and drop from the lower end outlet to the lifting chain mechanism 10 (with a fruit baffle), and then transported to the rear end root-fruit separation device 3 along the lifting chain mechanism 10. A driving motor is installed on one side of the center of the frame 6, which drives the stable operation of each component in the front-end device through the transmission device 11.

[0026] The rotary tillage device 7 comprises a pair of rotary tillage blades 14, a soil feeding shovel 15, a rotating shaft 16 and a soil collecting shell 17. The pair of rotary tillage blades 14 are fixed on the rotating shaft 16, which is connected to the transmission assembly on the outside of the frame 6 and is connected to the drive motor to realize the reversal of the rotary tillage blades. The soil feeding shovel 15 cooperates with the harvester to move forward, scoops up the bean-soil mixture crushed by the pair of rotary tillage blades 14 and transports it to the conveyor plate chain 8. The soil collecting shell 17 gathers the bean-soil mixture and enables the soil feeding shovel 15 to transport as many crops as possible to reduce the fruit leakage rate. At the same time, it is possible to avoid sundries such as cyperus oleifera plants or soil from entering the transmission assembly as much as possible, resulting in transmission blockage, damage to the mechanical device, and reduced harvesting efficiency. The conveyor plate chain 8 comprises a chain plate belt 18, a transmission mechanism 19 and a triangular vibration shaft 20. The chain belt 18 is connected to the transmission mechanism 19 and is driven by the driving motor to drive the chain belt 18 to rotate in a circular manner, so that the bean-soil mixture is transported to the rear end of the device. The chain belt 18 is provided with small sieve holes to preliminarily screen out some clods of soil and debris. The triangular vibration shaft 20 is connected to the driving motor through the transmission assembly, so that the chain belt 18 exhibits high-frequency up and down oscillations during transportation, further screening out clods of soil and debris. The triangular vibration shaft 20 belongs to the prior art, and its principle includes that the main shaft of the triangular vibration shaft 20 is installed on the frame 6, and a plurality of triangular support frames are mounted on the main shaft; a rotatable roller is installed at each corner of the triangular support frame, and when the main shaft rotates, the three rollers are driven to successively support the chain belt 18 passing from above, so that the chain belt 18 vibrates. The frame 6 is connected to the main body of the harvester to install a monitoring unit and a control system. The monitoring unit includes an angle sensor 36 and a displacement sensor 37. The angle sensor 36 is used to measure the angle between the lifting arm and the vertical fixed surface of the harvester body, monitor the vertical posture of the front-end device, and determine the digging depth of the rotary tillage device 7. The displacement sensor 37 is used to monitor the horizontal deviation of the frame 6 of the front-end device to ensure the linear stability of the harvester's operating path. The output ends of all sensors are electrically connected to the input ends of the control system to ensure the real-time transmission of the collected signals. The control system adjusts the oil cylinder 13 at the lower end of the lifting arm 12 in real time according to the vertical posture information of the front-end device collected by the angle sensor 36 to ensure the digging depth of the rotary tillage device 7. According to the horizontal deviation information of the frame collected by the displacement sensor 37, it is fed back to the cockpit in real time to ensure that the driver (man-driven) or the direction control system (unmanned) can quickly adjust the vehicle's operating status. The monitoring and control of the bidirectional posture of the front-end device can ensure the stable operation of the harvester's rotary tillage device and the automatic adjustment of the digging depth.

[0027] The root-fruit separation device 3 includes a central rotating mechanism 21 and a screen drum 22. As a screening system, the main function is to separate and screen the cyperus oleiferus from the stems, and to further screen out some soil blocks. The central rotating mechanism 21 is composed of a rotating shaft 23, a grass guide piece 24, a rope 25 and a grass-breaking knife 26. After the bean-soil mixture is transported to the screen drum 22 by the lifting chain mechanism 10, the transmission assembly drives the rotating shaft 23 to rotate the central rotating mechanism 21. The rope 25 on the connecting rod of the rotating shaft 23 applies an impact force to the stems during the rotation process to separate the cyperus oleiferus from the stems, and the scattered stems are pushed to the rear end of the screen drum 22 by the grass guide piece 24 for discharge. Considering that the stems are prone to blockage during the discharge process when the feeding amount is large, a grass-breaking knife 26 is installed at the rear end of the rotating shaft 23 (i.e., the rear end of the screen drum 22). When blockage occurs, the grass-breaking knife 26 motor is started to rotate at high speed to break the blocked stems. The outer sieve drum 22 rotates at a constant speed, and the separated cyperus rotundus and the soil blocks and small grass stems that are not discharged with the stems fall to the inner wall of the sieve drum 22, and fall to the fruit soil cleaning device as the sieve drum 22 rotates. A circular baffle is installed on the inner wall of the bottom side of the sieve drum 22 to prevent the cyperus rotundus from falling outside the sieve drum 22 during the rolling process. In addition, a torque sensor 38 is installed on the root and fruit separation device 3 to determine whether a blockage occurs by monitoring the torque of the rotating shaft 23, and start the grass cutter 26 motor in real time.

[0028] The fruit soil cleaning device 4 includes a separation screening system, a guide plate 28 and a collection plate 29. The separation screening system is composed of a horizontal vibrating screen 30, an eccentric rocker 31 and a cleaning fan 32. The mixed material containing broken grass, soil blocks and cyperus rotundus falls from the screen drum 22 to the horizontal vibrating screen 30 below. The vibrating screen 30 is based on a grid design, divided into nine equal parts along the axial direction, and a sawtooth grille (i.e., a sawtooth plate) is provided in the middle to divide it into four equal parts along the radial direction. The screen surface is opened with unequal diameters, and oblong holes are opened on the front three-quarters of the surface, which are mainly used to screen out weeds and broken soil impurities. The size of the opening on the rear quarter is slightly larger than the diameter of the cyperus rotundus bean body to ensure that the cyperus rotundus can fall to the lower end collection plate 29. The vibrating screen 30 realizes high-frequency vibration back and forth through the front eccentric rocker 31. The vibrating screen 30 and the eccentric rocker 31 are both prior art, and are similar to the vibration principle of the vibrating screen of the existing wheat harvester. During the vibration process, weeds and broken soil move to the front end of the screen, fall from the oblong holes to the lower end lead-out plate 28 and are directly discharged into the field. The cyperus juncea moves to the rear end of the screen, falls from the rear end pores to the collecting plate 29, and enters the next link. During the vibration screening process, the cleaning fan 32 uses strong wind to further blow the weeds and broken soil in the mixed material out of the screening system. In addition, a control device 39 is installed at the front end of the eccentric rocker 31, and a visual recognition module is installed at the upper end of the vibrating screen 30. According to the impurity content of the photographed mixed material, the amplitude and frequency of the vibrating screen 30 are adjusted in real time through the control device 39 to ensure the working efficiency and screening effect of the screening system.

[0029] The fruit collecting device 5 includes a secondary collecting device 33 (including a receiving hopper of a fruit bean elevator 34), a fruit bean elevator 34 and a storage bin 35. The sifted cyperus rotundus stem collecting plate 29 falls to the secondary collecting device 33, and the auger in the device transports the cyperus rotundus to the fruit bean elevator 34 on the right side of the harvester. The cyperus rotundus elevator 34 is equipped with a baffle, and the cyperus rotundus is transported to the storage bin 35 in a layered manner. The entrance of the storage bin 35 is designed to be sloped and equipped with a rubber pad to ensure the integrity and low skin breakage rate of the cyperus rotundus. In addition, according to the feeding amount of the cyperus rotundus entering the fruit bean elevator 34, the lifting speed is adjusted in real time to ensure maximum work efficiency.

[0030] It can be seen that the cyperus oleifera harvester of the present embodiment includes a vehicle body that can move autonomously, the front end of the vehicle body is connected to a digging platform for digging out a bean-soil mixture containing cyperus oleifera and soil blocks; a conveyor plate chain 8 is provided on the digging platform, the rear end of which is connected to an elevating chain mechanism 10 fixedly connected to the vehicle body, for conveying the bean-soil mixture to the elevating chain mechanism 10 through the conveyor plate chain 8; the rear end of the elevating chain mechanism 10 extends into the front part of the screen drum 22, for conveying the bean-soil mixture to the screen drum 22; A rotatable shaft 23 is provided at the center of the screen drum 22; a plurality of grass guides 24 and a plurality of throw ropes 25 are connected to the shaft 23, the throw ropes 25 are used to beat the fruit beans and rhizomes of the cyperus oleifera to separate them when the shaft 23 rotates, and the grass guides 24 are used to push the rhizomes to move toward the rear end of the screen drum 22 when the shaft 23 rotates; a plurality of evenly distributed large sieve holes are provided on the wall of the screen drum 22, so that the fruit beans can fall under the screen drum 22; under the screen drum 22, the vehicle body is connected A vibrating screen 30 that can swing back and forth; a plurality of evenly distributed small sieve holes are opened at the front of the vibrating screen 30, and a plurality of evenly distributed large sieve holes are opened at the rear thereof; a guide plate 28 with a bottom end that is fixedly connected to the vibrating screen 30 and tilted forward is located below the vibrating screen 30 and corresponds to the position of the small sieve holes of the vibrating screen 30, and is used to receive impurities that fall from the small sieve holes of the vibrating screen 30 and discharge them out of the vehicle; a collecting plate 29 with a bottom end that is fixedly connected to the vibrating screen 30 and tilted forward has its rear end located below the large sieve holes of the vibrating screen 30, and its The front end is located below the derivation plate 28 and corresponds to the top of the receiving trough of the fruit bean elevator 34, and is used to collect the fruit beans falling from the large sieve holes of the vibrating screen 30 and collect them into the fruit bean elevator 34; the outlet end of the fruit bean elevator 34 is located above the storage bin 35 fixedly connected to the vehicle body, and is used to transport the fruit beans to the storage bin 35; the collecting plate 29, the chain plate belt 18 of the conveying plate chain 8, and the chain plate belt 18 of the lifting chain mechanism 10 are all provided with a plurality of small sieve holes for screening out soil mixed in the fruit beans.

[0031] It should be noted that the excavation table is provided with a conveyor plate chain 8, and the chain plate belt 18 of the conveyor plate chain 8 has small sieve holes, forming a primary screening mechanism, which is mainly used for screening soil. The chain plate belt 18 of the lifting chain mechanism 10 has small sieve holes, forming a secondary screening mechanism, which is mainly used for screening soil. The screen cylinder 22 has large sieve holes, forming a tertiary screening mechanism, which is mainly used for screening out the beans and retaining the stems; the stems are finally discharged from the rear end of the screen cylinder 22. The vibrating screen 30 has small sieve holes, forming a quaternary screening mechanism, which is mainly used for screening soil. The collecting plate 29 has small sieve holes, forming a quintuple screening mechanism, which is mainly used for screening soil. The export plate 28 is mainly used to export impurities with a larger specific gravity, such as soil particles, stones, glass, screws, etc., to improve the cleanliness of the harvest.

[0032] Therefore, the present embodiment has at least five-level screening capabilities based on the self-propelled capability, and has a compact structure, reasonable layout, and strong screening capabilities. The present embodiment can solve the screening problem of a large amount of soil blocks adhering to the fibrous roots of Cyperus oleifera, and can dig and harvest at the same time, with high operating efficiency.

[0033] In order to further improve the screening capacity, a cleaning fan 32 is also included, which is fixedly connected to the lower part of the vehicle body; the air outlet of the cleaning fan 32 is located below the front end of the vibrating screen 30 and faces the small sieve holes of the vibrating screen 30. It can be seen that the airflow blown by the cleaning fan 32 flows through the small sieve holes of the vibrating screen 30 and the screen cylinder 22 in sequence, and can discharge light impurities such as stems, weeds, plastic sheets and crushed soil powder out of the vehicle to prevent them from falling into the collection plate 29. In essence, the cleaning fan 32 becomes the sixth-level screening mechanism, which is mainly used to screen out light impurities.

[0034] The upper end of the vibrating screen 30 is fixedly connected with a plurality of sawtooth plates evenly spaced to the left and right; the sawtooth plates are as long as the vibrating screen 30, and the tooth tips thereof face backwards. On the one hand, the distribution of the beans dropped from the screen drum 22 is more uniform; on the other hand, under the action of vibration, the tooth tips gradually push the stems and other impurities to the rear for discharge, avoiding accumulation in the small sieve hole area of ​​the vibrating screen 30 and causing blockage; and the impurity removal capacity is also improved.

[0035] In order to further improve the screening ability, the outer wall of the screen drum 22 is fixedly connected to a gear ring, the gear ring is meshed and connected with a gear arranged on the vehicle body, and the gear is connected to a driving motor for driving the screen drum 22 to rotate; the rotation direction of the screen drum 22 is opposite to the rotation direction of the rotating shaft 23. It can be seen that the reversed screen drum 22 increases the relative speed of the grass guide piece 24 and the swing rope 25, increases the impact force, improves the effect of bean stem separation, and also improves the ability to discharge the stems, and the screening efficiency is higher.

[0036] In order to facilitate the individual control of the grass-chopping blade 26, the grass-chopping blade 26 is fixedly connected to a sleeve, the sleeve is sleeved on the rotating shaft 23, and one end of the sleeve is connected to the motor fixed on the vehicle body through a chain transmission mechanism 19. Therefore, the switch and speed of the grass-chopping blade 26 can be individually controlled, and the parameters collected by the torque sensor 38 can be flexibly controlled to further improve the anti-blocking ability and dredging efficiency.

[0037] The area of ​​the small sieve holes of the vibrating screen 30 accounts for three quarters of the total area of ​​the vibrating screen 30; correspondingly, the area of ​​the large sieve holes of the vibrating screen 30 accounts for one quarter of the total area of ​​the vibrating screen 30. It can be seen that the area of ​​the small sieve holes for screening soil is expanded, the screening capacity is improved, and one quarter of the area is reserved as a fruit leakage area to ensure that the particles are returned to the warehouse.

[0038] The small sieve holes are oblong holes, which not only ensure that no fruit is leaked, but also expand the passability of crushed soil and improve the efficiency of soil screening. The large sieve holes are round holes, which ensure the passability of a single fruit bean and the passability of multiple fruit beans when they are stuck together.

[0039] In order to prevent beans from being scattered, baffles are respectively provided on the left and right sides of the screen cylinder 22, and the baffles are fixed to the vehicle body to prevent the fruit beans from falling outside the vibrating screen 30. Preferably, the lower part of the baffle extends to the middle of the vibrating screen 30 to form the annular baffle to ensure that all fruit beans fall into the vibrating screen 30.

[0040] If the digging platform digs too deep, it will not only lead to excessive digging, but also increase the resistance of the vehicle body, resulting in increased fuel consumption and reduced work efficiency. If the digging platform digs too shallow, it is easy to leak fruit, causing waste and reducing the harvest. Therefore, in order to ensure efficiency and avoid leaking fruit, the upper rear end of the digging platform is hinged to the vehicle body, and the lower part is hinged to the oil cylinder 13. The other end of the oil cylinder 13 is hinged to the vehicle body, which is used to control the digging depth of the front end of the digging platform through the extension and contraction of the oil cylinder 13, control the digging amount and avoid leaking fruit.

[0041] In summary, under the condition of limited space on the self-propelled vehicle body, this embodiment includes a five-stage screening mechanism, has a strong soil screening ability, can effectively screen out the soil blocks carried by the roots of Cyperus oleifera, and improve the efficiency and quality of Cyperus oleifera harvesting.

[0042] The parts of the present invention that are not described in detail are prior art. For ordinary technicians in this field, the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A self-propelled cyperus oleifera combine harvester, comprising a vehicle body capable of autonomous movement, characterized in that: The front end of the vehicle body is connected to a digging platform for digging out a bean-soil mixture containing cyperus oleifera and soil blocks; a conveying plate chain (8) is provided on the digging platform, the rear end of which is butt-jointed with an elevating chain mechanism (10) fixedly connected to the vehicle body; the rear end of the elevating chain mechanism (10) extends into the front part of a screen drum (22) mounted on the vehicle body; a rotatable rotating shaft (23) is provided at the center of the screen drum (22); a plurality of grass guide blades (24) and a plurality of swing ropes (25) are connected to the rotating shaft (23); a plurality of evenly distributed large screen holes are provided on the wall of the screen drum (22); Below the screen drum (22), the vehicle body is connected to a reciprocatingly swingable vibrating screen (30); a plurality of evenly distributed small screen holes are provided at the front of the vibrating screen (30), and a plurality of evenly distributed large screen holes are provided at the rear; the area of ​​the small screen holes of the vibrating screen (30) accounts for three quarters of the total area of ​​the vibrating screen (30); a guide plate (28) fixedly connected to the vibrating screen (30) and tilted forward at the bottom end is located below the vibrating screen (30) and corresponds to the position of the small screen holes of the vibrating screen (30); a collecting plate (29) fixedly connected to the vibrating screen (30) and tilted forward at the bottom end has a rear end located below the large screen holes of the vibrating screen (30) and a front end located below the guide plate (28) and corresponding to the top of a receiving trough of a bean elevator (34); an outlet end of the bean elevator (34) is located above a storage bin (35) fixedly connected to the vehicle body; The collecting plate (29), the chain plate belt of the conveying plate chain (8), and the chain plate belt of the lifting chain mechanism (10) are all provided with a plurality of small sieve holes for screening soil.

2. The self-propelled cyperus oleifera combine harvester according to claim 1, characterized in that: It also includes a cleaning fan (32) fixedly connected to the lower part of the vehicle body; the air outlet of the cleaning fan (32) is located below the front end of the vibrating screen (30) and faces the small sieve holes of the vibrating screen (30).

3. The self-propelled cyperus oleifera combine harvester according to claim 1, characterized in that: The upper end of the vibrating screen (30) is fixedly connected to a plurality of sawtooth plates evenly spaced to the left and right; the length of the sawtooth plates is the same as that of the vibrating screen (30), and the tips of the teeth face backwards.

4. The self-propelled cyperus oleifera combine harvester according to claim 1, characterized in that: The outer wall of the screen drum (22) is fixedly connected to a gear ring, the gear ring is meshingly connected to a gear arranged on the vehicle body, the gear is connected to a drive motor for driving the screen drum (22) to rotate; the rotation direction of the screen drum (22) is opposite to the rotation direction of the rotating shaft (23).

5. The self-propelled cyperus oleifera combine harvester according to claim 1, characterized in that: The rear portion of the rotating shaft (23) is connected to a grass-chopping knife (26).

6. The self-propelled cyperus oleifera combine harvester according to claim 5, characterized in that: The grass-chopping blade (26) is fixedly connected to a sleeve, and the sleeve is sleeved on the rotating shaft (23), and one end of the sleeve is connected to a motor fixedly mounted on the vehicle body through a chain transmission mechanism (19).

7. The self-propelled cyperus oleifera combine harvester according to claim 1, characterized in that: The small sieve holes are oblong holes; the large sieve holes are round holes.

8. The self-propelled cyperus oleifera combine harvester according to claim 1, characterized in that: Baffles are respectively provided on the left and right sides of the screen cylinder (22), and the baffles are fixedly connected to the vehicle body and are used to prevent fruit beans from falling outside the vibrating screen (30).

9. The self-propelled cyperus oleifera combine harvester according to claim 1, characterized in that: The upper rear end of the excavating platform is hinged to the vehicle body, and the lower part is hinged to the oil cylinder (13). The other end of the oil cylinder (13) is hinged to the vehicle body, and is used to control the digging depth of the front end of the excavating platform by extending and retracting the oil cylinder (13).

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