Corn harvester grain recovery mechanism and corn harvester

Abstract

The invention discloses a corn harvester grain recovery mechanism and a corn harvester, and relates to the field of agricultural technology. The mechanism comprises a corn harvester body and a threshing drum. A threshing shaft is connected inside the threshing drum, and a plurality of threshing teeth are arranged on the threshing shaft and are distributed at spiral intervals along the outer peripheral wall thereof. The mechanism also comprises a spiral rod, which is sleeved on the threshing shaft and is reciprocated along the axis of the threshing shaft and is used for pushing corn to move close to the threshing drum. In the invention, in the corn harvester, the threshing shaft rotates to drive the threshing drum and the threshing teeth to rotate, and the grille in the threshing drum can rub the corn and thresh it. During the rotation, friction and extrusion are performed for preliminary threshing. The threshing teeth are arranged in a spiral manner and hit the corn for further threshing. The spiral rod reciprocates in the gap between the threshing teeth, and pushes the corn toward the grille against and squeezes the corn, so as to help thresh small-sized or soft corn. The thickness of the middle part of the spiral rod is different and changes gradually, which is beneficial to threshing corn and separating impurities at different stages.

Description

Technical Field

[0001] The invention relates to the technical field of agriculture, and in particular to a corn harvester seed recovery mechanism and a corn harvester. Background Art

[0002] The traditional manual corn harvesting method is labor-intensive, inefficient, and requires a lot of manpower and time. However, the corn harvester can complete the corn harvesting operation over a large area in a short time, greatly improving labor productivity, reducing the labor intensity of farmers, and enabling farmers to complete the autumn harvest more timely and prepare for the next season's agricultural production.

[0003] When the corn thresher is started, the threshing drum and the internal threshing shaft rotate together with the threshing teeth on the threshing shaft. The threshing teeth will hit the corn during the rotation process, destroying the connection between the corn kernels and the corn cobs, and accelerating the threshing process. There are sharp grids on the inner wall of the threshing drum. When the corn rotates in the drum, the friction between the corn and the grid increases. This large friction can cause relative displacement between the corn kernels and the corn cobs, thereby helping to scrape the corn kernels off the corn cobs, just like rubbing the corn with a rough tool to make the corn kernels fall off.

[0004] However, the size and spacing of the threshing teeth and the grille need to be designed according to the normal size of corn, which can maximize the threshing efficiency while ensuring the threshing effect, and make the threshing teeth fully hit the corn during the rotation process to cover more threshing areas. If the size and spacing of the threshing teeth and the grille are designed too small, although it may have a better threshing effect for smaller-sized corn, it will cause excessive squeezing and friction of normal-sized corn during the threshing process, increase the grain breakage rate, and also reduce the threshing efficiency; on the contrary, if the size and spacing are too large, normal-sized corn will not be threshed cleanly.

[0005] Therefore, for smaller corns, not only can the threshing teeth of the current threshing drum fail to fully hit all parts of the corns, but the friction between the grille and the corns cannot evenly act on the entire surface of the smaller corns, so that some corn kernels cannot be subjected to sufficient friction and remain on the corn cobs, resulting in incomplete threshing. In addition, the moisture content of the corn cobs of some corns is too high, and their fiber tissues will absorb a large amount of moisture and become swollen, soft, and have increased toughness. During the threshing process, it is difficult for the threshing teeth to effectively separate the corn kernels from their surface like corn cobs with normal moisture. When the threshing teeth hit the corn, the force is easily absorbed and dispersed by the corn cobs, and cannot be concentrated on the connection between the corn kernels and the corn cobs, resulting in the corn kernels being difficult to fall off. Summary of the invention

[0006] The object of the present invention is to provide a corn harvester grain recovery mechanism to solve the problems raised in the above background technology.

[0007] Another object of the present invention is to provide a corn harvester.

[0008] In order to solve the above technical problems, the present invention provides a corn harvester grain recovery mechanism, including a corn harvester body and a threshing drum, the interior of the threshing drum is connected to a threshing shaft, the threshing shaft is provided with a plurality of threshing teeth distributed at spiral intervals along its outer peripheral wall, and also includes a spiral rod, which is reciprocatingly sleeved on the threshing shaft along the axis of the threshing shaft and is used to push the corn to move closer to the threshing drum; the spiral rod is divided into two parts in the length direction, the part close to the feed port of the threshing drum is of equal diameter, and the part close to the discharge port of the threshing drum has a rod diameter that gradually increases from the feed port to the discharge port.

[0009] Furthermore, there is at least one spiral rod, and the pitch of the spiral rod is an integer multiple of the spacing between the threshing teeth.

[0010] Furthermore, it also includes a squeezing ball, which is elastic and has a through hole running through it. The squeezing ball is sleeved on the spiral rod, and there is a gap between the inner wall of the squeezing ball and the outer wall of the spiral rod; an elastic member, at least one elastic member is arranged in the vertical direction of the gap, and the two ends of the elastic member are respectively connected to the inner wall of the squeezing ball and the outer wall of the spiral rod.

[0011] Furthermore, a fixing ring is arranged inside the through opening, and there is a gap between the outer wall of the fixing ring and the inner wall of the through opening. The fixing ring is sleeved on the spiral rod and is rotatably connected to the spiral rod. The elastic member is initially arc-shaped, and there are two elastic members. The inner arcs of two adjacent elastic members correspond to each other, and the end of the elastic member away from the extrusion ball is connected to the outer wall of the fixing ring.

[0012] Furthermore, two notches are symmetrically arranged on the extrusion ball, the notches are communicated with the through opening, and the two elastic members are located at the bottom of one of the notches.

[0013] Furthermore, a rough treatment is performed on the side wall of the spiral rod near the feed port of the threshing drum other than the contacting part with the threshing shaft.

[0014] Further, the driving mechanism comprises a connecting plate slidably arranged inside the threshing shaft, and the two ends of the connecting plate are respectively connected to the two screw rods for driving the two screw rods to reciprocate along the threshing shaft; two strip-shaped openings for the connecting plate to reciprocate are horizontally arranged on both sides of the threshing shaft; a connecting part is fixed inside the main body of the corn harvester, one end of the threshing shaft extends to the outside of the threshing drum and is rotatably connected to one end of the connecting part; a supporting rod is inserted into the threshing shaft, the bottom end of the supporting rod extends to the outside of the threshing shaft and is connected to the connecting part, the top end is connected to a reciprocating screw rod, and the connecting plate is threadedly connected to the reciprocating screw rod;

[0015] Two strip plates are installed on the top and bottom of the connecting plate, and the threshing shaft is provided with a plurality of accommodating grooves, the strip plates are located inside the accommodating grooves and are slidably connected to the accommodating grooves, the accommodating grooves are communicated with the strip openings, the strip plates are located inside the strip openings, and the outer walls of the strip plates are against the inner walls of the strip openings, the two strip plates above the connecting plate are respectively located inside the two upper accommodating grooves and are slidably connected thereto, and the two strip plates below the connecting plate are respectively located inside the two lower accommodating grooves and are slidably connected thereto.

[0016] Furthermore, the connecting part includes a connecting seat whose one end is connected to the inner wall of the corn harvester body, the connecting seat is provided with a socket and a rotating groove, the bottom end of the threshing shaft is inserted into the rotating groove through the socket and is rotatably connected to the rotating groove, the threshing shaft is provided with an annular groove, the inner top wall of the rotating groove is abutted against the inner bottom wall of the annular groove, the inner bottom wall of the rotating groove is abutted against the bottom end of the threshing shaft, the inner wall of the socket is abutted against the inner wall of the annular groove, a slot is provided inside the connecting seat, one end of the support rod extending to the outside of the threshing shaft extends to the inside of the slot and is connected to the inner wall of the slot, and the slot is communicated with the rotating groove.

[0017] Furthermore, an inclined plate is installed on the outer wall of the squeezing ball, and the inclined plate is trapezoidal. The outer wall of the inclined plate is close to the inner wall of the threshing shaft. The threshing shaft is provided with a cavity for the reciprocating movement of the connecting plate. The reciprocating screw rod is located inside the cavity. The top end of the reciprocating screw rod is rotatably connected to the inner top wall of the cavity. The connection between the reciprocating screw rod and the support rod is rotatably connected to the inner bottom wall of the cavity. The cavity is connected to two strip openings.

[0018] A corn harvester comprises any one of the above-mentioned corn harvester grain recovery mechanisms.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the present invention, in the corn harvester, the threshing shaft rotates to drive the threshing drum and the threshing teeth to rotate, the grille in the threshing drum can rub the corn and thresh it, and the friction and extrusion during rotation are initially threshed, and the threshing teeth are spirally arranged to hit the corn for further threshing, and the spiral rod reciprocates in the gap between the threshing teeth to push the corn toward the grille to help thresh small-sized or soft corn, and the upper and lower middle parts of the spiral rod are different in thickness and gradually change, which is conducive to corn threshing and impurity separation at different stages.

[0021] 2. In the present invention, there is a gap between the fixed ring and the squeezing ball. When the squeezing ball moves downward with the spiral rod, the corn cob can be pushed toward the grille. When encountering a hard corn cob, the squeezing ball will deform toward the fixed ring. The elastic member is made of elastic material. When the squeezing ball is deformed, the elastic member changes from bending to straightening. After the external force disappears, the bending is restored due to super elasticity, so that the squeezing ball can work normally. When encountering soft corn, it is squeezed to the grille, and when encountering a hard corn cob, it can be deformed and pass through.

[0022] 3. In the present invention, stress concentration will occur when the extruded ball deforms inwardly into an elliptical shape. If it cannot be released, it may cause material damage. The notch provides a release channel for the stress. During the deformation of the extruded ball, the stress can be released to the outside through the notch, reducing the risk of damage due to stress concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the connection structure between the threshing drum and the threshing shaft in the present invention;

[0025] Figure 3 It is a schematic diagram of the connection structure between the strip opening and the strip plate in the present invention;

[0026] Figure 4 It is a schematic diagram of the connection structure between the threshing shaft and the threshing teeth in the present invention;

[0027] Figure 5 Schematic diagram of the shape of the spiral rod in the present invention;

[0028] Figure 6 It is a schematic diagram of the connection structure between the spiral rod and the fixing ring in the present invention;

[0029] Figure 7 It is a schematic diagram of the connection structure between the extrusion ball and the fixing ring in the present invention;

[0030] Figure 8 It is a schematic diagram of the connection structure between the spiral rod and the connecting plate in the present invention;

[0031] Fig. 9 It is a schematic diagram of the connection structure between the strip plate and the containing groove in the present invention;

[0032] Fig.10 It is a schematic diagram of the connection structure between the reciprocating screw rod and the support rod in the present invention;

[0033] Fig.11 It is a schematic diagram of the connection structure between the connecting seat and the annular groove in the present invention.

[0034] In the figure: 1. The main body of the corn harvester;

[0035] 2. Threshing drum; 3. Threshing shaft; 4. Threshing teeth; 5. Connecting seat; 6. Screw rod; 7. Extrusion ball; 8. Strip opening; 9. Strip plate; 10. Annular groove; 11. Inclined plate; 12. Through opening; 13. Notch; 14. Elastic member; 15. Fixed ring; 16. Reciprocating screw rod; 17. Cavity; 18. Connecting plate; 19. Accommodating groove; 20. Support rod; 21. Slot; 22. Socket; 23. Rotating groove. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] The present invention provides a technical solution:

[0038] See also Figure 1-Figure 11 As shown, a corn harvester grain recovery mechanism comprises a corn harvester body 1 and a threshing drum 2, wherein a threshing shaft 3 is connected to the inside of the threshing drum 2, and a plurality of threshing teeth 4 are arranged on the threshing shaft 3 and are distributed along the outer peripheral wall thereof in a spiral interval, and further comprises a spiral rod 6, which is sleeved on the threshing shaft 3 and reciprocates along the axis of the threshing shaft 3 and is used for pushing corn to move close to the threshing drum 2;

[0039] The spiral rod 6 is divided into two parts in the length direction. The part close to the feed port of the threshing drum 2 is set with equal diameter, and the part close to the discharge port of the threshing drum 2 has a rod diameter gradually increasing from the feed port to the discharge port.

[0040] One end of the threshing shaft 3 is inserted through the threshing drum 2 and extends to the outside of the threshing drum 2. The threshing drum 2 is fixedly connected to the outer wall of the threshing shaft 3. Therefore, when the threshing shaft 3 rotates, the threshing drum 2 and the threshing teeth 4 will rotate together, and the driving system in the corn harvester body 1 will drive the threshing shaft 3 to rotate, and finally the entire threshing drum 2 will rotate.

[0041] The threshing drum 2 is located inside the main body 1 of the corn harvester. When the threshing drum 2 starts to rotate, the corn enters the threshing drum 2 from the feed port of the threshing drum 2, and the threshing shaft 3 and the threshing teeth 4 rotate together. The inner wall of the threshing drum 2 is provided with a sharp grille. When the corn enters the threshing drum 2, the grille on the inner wall of the threshing drum 2 can grab the corn to prevent it from sliding freely in the threshing drum 2. Since the threshing drum 2 is rotating, the grille is like a claw, which rotates with the corn. The sharp grille will produce friction and compression on the corn during the contact with the corn. When the corn rubs against the grille, the edge of the grille will be inserted into the gap between the corn kernels and the corn cob, so that some of the corn kernels fall off. This preliminary threshing effect helps to reduce the working pressure of the subsequent threshing components.

[0042] The threshing shaft 3 supports and stabilizes the threshing drum 2, and can ensure that the threshing drum 2 maintains balance during high-speed rotation, and prevents the threshing drum 2 from shaking, deflecting, etc. The threshing teeth 4 are fixedly mounted on the outer wall of the threshing shaft 3, and the threshing teeth 4 arranged spirally on the threshing shaft 3 will rotate with the rotation of the threshing shaft 3. These threshing teeth 4 will frequently contact with the corn during the rotation process. Due to their certain length and shape, they will have a strong striking effect on the corn, just like continuously hitting the corn with a series of small hammers, so that the corn kernels fall off the corn under the action of the impact force, thereby effectively improving the threshing efficiency;

[0043] Moreover, the spiral arrangement of the threshing teeth 4 enables the corn to be struck by the threshing teeth 4 from multiple angles in the threshing drum 2. The corn cobs in the threshing drum 2 not only roll as the threshing drum 2 rotates, but are also pushed to move axially along the threshing drum 2 due to the spiral arrangement of the threshing teeth 4, thereby causing the corn kernels to fall through the pores of the grille, while the corn cobs are continuously transported forward to the outlet of the threshing drum 2.

[0044] The two screw rods 6 move back and forth along the axial direction of the threshing shaft 3. Figure 4 It is shown in the figure that the spiral rod 6 is located between the corresponding multiple threshing teeth 4 above and below. Since the multiple threshing teeth 4 are arranged in a spiral along the axial direction of the threshing shaft 3, a spiral gap is left between the multiple threshing teeth 4, and the spiral rod 6, which is also spiral, is just located in the spiral gap between the multiple threshing teeth 4, and the reciprocating space of the spiral rod 6 is also located in the spiral gap between the multiple threshing teeth 4, and the spiral rod 6 does not contact the threshing teeth 4;

[0045] The corn is located between the threshing shaft 3 and the threshing drum 2, so when the spiral rod 6 moves, it will resist and squeeze the corn, so that the corn close to the outer wall of the threshing shaft 3 is pushed to the grille close to the threshing drum 2, and the spiral shape of the spiral rod 6 will have a guiding effect on the corn. This situation can be compared to the movement of a nut on a screw rod. The spiral rod 6 is like a screw rod, and the corn is like an object around the screw rod. Since the spiral shape of the spiral rod 6 obliquely surrounds the threshing shaft 3, when it moves along the threshing shaft 3, it will be like a moving chute, so that the corn is pushed to the grille close to the threshing drum 2 along the oblique direction of the spiral.

[0046] For some small-sized corns, and some corns whose fiber tissue absorbs a lot of water and becomes swollen, soft, and tougher because the moisture content of the corn cob is too high, when the spiral rod 6 moves between the small-sized corns and the threshing shaft 3, the spiral rod 6 will push the small-sized corns and the soft corns toward the grille of the threshing drum 2, so that the small-sized corns and the soft corns can contact the grille, and then the small-sized corns and the soft corns can be frictionally threshed. This is because the outer diameter of the spiral rod 6 is usually larger than the size of the corn, and its spiral structure has an oblique characteristic. When it moves along the threshing shaft 3, it will generate a component force that pushes the corn toward the grille of the threshing drum 2, just like an oblique wedge inserted under an object, and then pushes the object upward when moving forward;

[0047] The small-sized corn has a certain fluidity in the threshing drum 2. When the spiral rod 6 exerts a pushing force on it, the surrounding corn will give way due to mutual squeezing and sliding, so that the pushed small-sized corn can move smoothly toward the grid and finally contact the grid. When some corn cobs become soft and tough due to excessive moisture, the striking effect of the threshing teeth 4 will be greatly reduced. The squeezing force can make up for the deficiency of the threshing teeth 4 by squeezing the corn onto the grid. The grid can provide a stable and continuous squeezing force acting on the entire corn, so that the connection between the corn kernels and the corn cobs gradually loosens under this pressure, and the soft corn is squeezed onto the grid, so that the soft corn gets more squeezing force, thereby helping the corn kernels to be threshed. However, at the same time, it is necessary to reasonably control the feeding amount and feeding speed of the corn in the threshing drum 2 to ensure that the corn has an appropriate density in the threshing drum 2, which is conducive to the spiral rod 6 to better play its function of pushing the small-sized corn to contact the grid.

[0048] Depend on Figure 4From the perspective of the present invention, the spiral rod 6 is divided by the middle part, and the part below the middle part is relatively thin. This part can first push the corn toward the top of the grille of the threshing drum 2, while the part above the middle part of the spiral rod 6 is relatively thick. Because the corn is ground and threshed at the beginning, when the corn is transmitted to the middle and upper part of the spiral rod 6, that is, when it is about to reach the outlet of the threshing drum 2, the corn has become a corn cob. After the corn becomes a corn cob, the overall size will become smaller. After being threshed, corn kernels will remain in normal-sized corn and small-sized corn. Therefore, the thicker part of the spiral rod 6 can continue to play a pushing role in the corn cob stage, so that the corn cob with some residual corn kernels is continued to be pushed to the grille of the threshing drum 2;

[0049] As for why the part above the middle of the spiral rod 6 is thicker as it is closer to the end of the threshing drum 2 outlet, and specifically presents a gradual change from the middle part as the starting end to the smaller bottom and larger top, this is because during the corn threshing process, the corn gradually becomes a corncob, and its size gradually decreases. The part above the middle of the spiral rod 6 presents a gradual change from the smaller bottom to the larger top, which can better match this gradual change process;

[0050] If the diameter of the spiral rod 6 is uniform, it may not fit the material well when the corn has just been threshed and the size has not been reduced much, resulting in poor pushing effect or excessive squeezing of the material, and may also force some corn cobs that have not been completely threshed or other impurities to the outlet. The gradually changing spiral rod 6 can give the impurities more opportunities to be further separated in the threshing drum 2 through the gradually changing structure during the pushing process, and the gradually changing shape can also provide appropriate contact and pushing at all stages of corn threshing, not only allowing the corn cob to move smoothly to the outlet, but also ensuring that the corn cob can contact the grille, so that the remaining corn kernels are threshed;

[0051] Secondly, due to the turning direction of the threshing shaft 3 and the threshing drum 2, and the arrangement of the threshing teeth 4, the corn will always be transported to the outlet of the threshing drum 2, and the spiral rod 6 gradually changes from small to large in the direction of the outlet of the threshing drum 2, which means that the spiral rod 6 will not force the corn to the outlet when it moves. Figure 4 As shown in the figure, when the screw rod 6 moves downward, the corn will be pushed downward, and the corn will be transported upward by the threshing shaft 3 and the threshing teeth 4. The two directions are opposite, which makes it easier for the screw rod 6 to pass through the corn and push the corn toward the grille of the threshing drum 2.

[0052] See also Figure 2-Figure 7 The number of the spiral rod 6 is at least one, and the pitch of the spiral rod 6 is an integral multiple of the spacing between the threshing teeth 4.

[0053] A plurality of threshing teeth 4 are arranged in an axial spiral along the threshing shaft 3, so that a spiral gap is left between the plurality of threshing teeth 4, and the spiral rod 6 which is also spirally shaped is just located in the spiral gap between the plurality of threshing teeth 4, and the reciprocating space of the spiral rod 6 is also located in the spiral gap between the plurality of threshing teeth 4.

[0054] See also Figure 3-Figure 11 , further comprising, a squeezing ball 7, which is elastic and has a through hole 12 therethrough, the squeezing ball 7 is sleeved on the spiral rod 6, and there is a gap between the inner wall of the squeezing ball 7 and the outer wall of the spiral rod 6;

[0055] An elastic member 14 , at least one elastic member 14 is arranged in the vertical direction of the gap, and two ends of the elastic member 14 are respectively connected to the inner wall of the extrusion ball 7 and the outer wall of the screw rod 6 .

[0056] The squeezing ball 7 is located at the gradient position above the middle of the screw rod 6. Since there is a gap between the squeezing ball 7 and the screw rod 6, when the squeezing ball 7 moves down with the screw rod 6, the squeezing ball 7 can push the corn cob toward the grid of the threshing drum 2. When encountering a harder corn cob, the squeezing ball 7 will deform toward the direction of the screw rod 6 to Figure 6 From the perspective of the squeezing ball 7, the right side of the squeezing ball 7 will contact the corn cob. When the squeezing ball 7 is deformed, the right side of the squeezing ball 7 will move toward the right side of the spiral rod 6, and the through-port 12 will also be close to the outer wall of the fixing ring 15. Then the initial shape of the elastic member 14 is curved. The elastic member 14 can be a deformable material such as hard plastic or nickel-titanium alloy. When the squeezing ball 7 is deformed, the elastic member 14 on the right side will gradually change from curved to straight. Since the elastic member 14 itself has superelasticity, when the elastic member 14 is squeezed into a vertical state, its crystal structure undergoes a phase change, generating a certain amount of strain energy. When the external force is removed, as its own stress is released, the crystal structure of the alloy will automatically return to its original state, causing the elastic member 14 to automatically bend back.

[0057] Therefore, the elastic member 14 makes the initial state of the squeeze ball 7 be Figure 6 In the state, when the squeezing ball 7 squeezes the softer corn, the squeezing ball 7 will squeeze it to make it closer to the grid, while for the bare hard corn cob, the squeezing ball 7 will deform inward to ensure that the spiral rod 6 and the squeezing ball 7 can continue to move through the corn.

[0058] See also Figure 3-Figure 10 The fixing ring 15 is arranged inside the through opening 12, and there is a gap between the outer wall of the fixing ring 15 and the inner wall of the through opening 12. The fixing ring 15 is sleeved on the spiral rod 6 and is rotatably connected with the spiral rod 6.

[0059] The elastic member 14 is initially arc-shaped. There are two elastic members 14 . The inner arcs of two adjacent elastic members 14 correspond to each other. One end of the elastic member 14 away from the squeezing ball 7 is fixedly connected to the outer wall of the fixing ring 15 .

[0060] The fixing ring 15 and the squeezing ball 7 are both located at the gradient position above the middle of the screw rod 6. Since there is a gap between the squeezing ball 7 and the fixing ring 15, when the squeezing ball 7 moves downward with the screw rod 6, the squeezing ball 7 can push the corn cob toward the grid of the threshing drum 2. When encountering a harder corn cob, the squeezing ball 7 will deform toward the fixing ring 15. The fixing ring 15 replaces the screw rod 6 and is connected to the elastic member 14, so that the stress of the deformation of the elastic member 14 can be transmitted to the fixing ring 15 to avoid damaging the screw rod 6. The inner wall of the fixing ring 15 is rotatably connected to the outer wall of the screw rod 6.

[0061] When the squeezing ball 7 is deformed, the right side of the squeezing ball 7 will move toward the right side of the fixing ring 15 , and the through opening 12 will also approach the outer wall of the fixing ring 15 .

[0062] See also Figure 6-Figure 7 Two notches 13 are symmetrically arranged on the extrusion ball 7, the notches 13 are connected to the through-hole 12, two elastic members 14 are located at the bottom of one of the notches 13, one of the notches 13 is located at the top of the through-hole 12, and the other notch 13 is located at the bottom of the through-hole 12, and one end of the elastic member 14 connected to the through-hole 12 is close to the edge of the notch 13.

[0063] When the squeezing ball 7 is deformed inward, it will be deformed into an elliptical shape. At this time, stress concentration will occur inside the material. If these stresses have no suitable release path, they may cause the ring material to rupture or other damage. The notch 13 provides a release channel for the stress, just like opening a small hole in a balloon filled with pressure. The internal pressure can be released to a certain extent through this small hole. During the deformation of the squeezing ball 7, the stress can be released to the outside through the notch 13, thereby reducing the risk of damage to the inside of the squeezing ball 7 due to stress concentration. Therefore, when the squeezing ball 7 is deformed, the notch 13 will shrink.

[0064] See also Figure 2-Figure 8 The side wall of the spiral rod 6 near the feed port of the threshing drum 2 other than the contact with the threshing shaft 3 is roughened.

[0065] By rubbing the particles, the equal-diameter portion below the middle of the spiral rod 6 has a very high friction force. Therefore, when the spiral rod 6 moves, it can not only lift the corn, but also roll the corn while moving along the corn, turn the corn over, and change the angle of the corn facing the grille, so that multiple sides of the corn can contact the grille, thereby improving the threshing effect.

[0066] See also Figure 2 and Fig.11, a driving mechanism, a connecting plate 18 slidably disposed inside the threshing shaft 3, with two ends respectively connected to the two screw rods 6, for driving the two screw rods 6 to reciprocate along the threshing shaft 3;

[0067] Two strip openings 8 for the reciprocating movement of the connecting plate 18 are horizontally arranged on both sides of the threshing shaft 3;

[0068] The connecting part is fixed inside the corn harvester body 1, and one end of the threshing shaft 3 extends to the outside of the threshing drum 2 and is rotatably connected to one end of the connecting part;

[0069] The support rod 20 is inserted into the threshing shaft 3, the bottom end of which extends to the outside of the threshing shaft 3 and is fixedly connected to the connecting part, the top end of which is fixedly connected to the reciprocating screw rod 16, and the connecting plate 18 is threadedly connected to the reciprocating screw rod 16;

[0070] Two strip plates 9 are fixedly installed on the top and bottom of the connecting plate 18, and a plurality of receiving grooves 19 are provided on the threshing shaft 3. The strip plates 9 are located inside the receiving grooves 19 and are slidably connected to the receiving grooves 19. The receiving grooves 19 are communicated with the strip openings 8. The strip plates 9 are located inside the strip openings 8. The outer walls of the strip plates 9 are against the inner walls of the strip openings 8. The two strip plates 9 above the connecting plate 18 are respectively located inside the two upper receiving grooves 19 and are slidably connected thereto. The two strip plates 9 below the connecting plate 18 are respectively located inside the two lower receiving grooves 19 and are slidably connected thereto.

[0071] The threshing shaft 3 is provided with two strip openings 8, which are respectively located on the left and right sides of the threshing shaft 3 and correspond to each other horizontally. Both ends of the connecting plate 18 extend to the outside of the threshing shaft 3 through the strip openings 8 and are fixedly connected to the outer wall of the screw rod 6. Therefore, when the connecting plate 18 moves back and forth with the screw rod 6, the connecting plate 18 will move along the strip opening 8. The bottom end of the support rod 20 is fixed on the connecting part, so the support rod 20 and the reciprocating screw rod 16 will not rotate. The top end of the threshing shaft 3 is connected to the driving system inside the corn harvester body 1. The driving system can be a motor or other components, which is used to drive the threshing shaft 3 to rotate together with the threshing drum 2, and the end of the threshing shaft 3 away from the driving system is rotatably connected to the connecting part. The connecting part provides support force for the threshing shaft 3 to prevent it from falling and deviating, and will not affect the rotation of the threshing shaft 3.

[0072] When the threshing shaft 3 rotates, the threshing shaft 3 will rotate along the outer wall of the support rod 20, while the support rod 20 and the reciprocating screw rod 16 will not rotate, the connecting plate 18 and the spiral rod 6 will rotate together with the threshing shaft 3, and the connecting plate 18 will rotate along the outer wall of the reciprocating screw rod 16. When the connecting plate 18 and the threshing shaft 3 continue to rotate in one direction, the connecting plate 18 will move along the outer wall of the reciprocating screw rod 16. Fig. 9When the connecting plate 18 moves to the top of the reciprocating screw rod 16, the connecting plate 18 will automatically move downward along the reciprocating screw rod 16, and when the connecting plate 18 moves to the bottom of the reciprocating screw rod 16, the connecting plate 18 will also automatically move upward along the reciprocating screw rod 16;

[0073] This is because the thread of the reciprocating screw 16 has a bidirectional spiral structure, which is similar to having two threads with opposite rotation directions on the screw, but is actually a special complex thread that changes continuously. When the connecting plate 18 is connected to the reciprocating thread, the connecting plate 18 will move according to the characteristics of the thread during the rotation process, and the threaded portion of the connecting plate 18 that contacts the reciprocating screw 16 will be guided by the thread. Because the thread is a continuous bidirectional structure, under the continuous rotation of the connecting plate 18, it will first move in one direction according to the guidance of the thread, and after reaching a certain position, it will move in the opposite direction under the action of the thread.

[0074] Therefore, the threshing shaft 3 only needs to rotate continuously in the same direction, and the connecting plate 18 can drive the screw rod 6 to move back and forth. Fig. 9 As shown in FIG. 1 , the reciprocating screw rod 16 has the same height as the strip opening 8, so the moving range of the connecting plate 18 and the screw rod 6 is also limited to the height of the strip opening 8 and the reciprocating screw rod 16. Figure 3 and Figure 4 In the embodiment, the height of the strip opening 8 is within the spiral gap between the plurality of threshing teeth 4, so that the spiral rod 6 will not hit the threshing teeth 4;

[0075] When the connecting plate 18 moves, the two strip plates 9 at the top of the connecting plate 18 will move along the two upper receiving grooves 19, and the two strip plates 9 below the connecting plate 18 will move along the two lower receiving grooves 19. Fig. 9 It is shown that even if the connecting plate 18 moves to the bottom end of the reciprocating screw rod 16, the strip plate 9 at the top of the connecting plate 18 will not move out of the upper accommodating groove 19, and the strip plate 9 at the bottom of the connecting plate 18 will not move out of the lower accommodating groove 19. In this way, when the connecting plate 18 reciprocates, the upper and lower strip plates 9 can alternately block the strip opening 8 to prevent impurities and corn kernels from entering the threshing shaft 3 through the strip opening 8.

[0076] See also Figure 6-Figure 7The connecting part includes a connecting seat 5, one end of which is fixedly connected to the inner wall of the corn harvester body 1. The connecting seat 5 is provided with a socket 22 and a rotating groove 23. The bottom end of the threshing shaft 3 is inserted into the rotating groove 23 through the socket 22 and is rotatably connected with the rotating groove 23. The threshing shaft 3 is provided with an annular groove 10. The inner top wall of the rotating groove 23 abuts against the inner bottom wall of the annular groove 10. The inner bottom wall of the rotating groove 23 abuts against the bottom end of the threshing shaft 3. The inner wall of the socket 22 abuts against the inner wall of the annular groove 10. A slot 21 is provided inside the connecting seat 5. One end of the support rod 20 extending to the outside of the threshing shaft 3 extends to the inside of the slot 21 and is fixedly connected to the inner wall of the slot 21. The slot 21 is connected to the rotating groove 23.

[0077] When the threshing shaft 3 rotates, the annular groove 10 will rotate along the inner wall of the socket 22, and the inner top wall of the rotating groove 23 will abut against the inner bottom wall of the annular groove 10. The diameter of the socket 22 is smaller than the diameter of the threshing shaft 3. Therefore, the bottom end of the threshing shaft 3 is fixed in the rotating groove 23 to prevent the bottom end of the threshing shaft 3 from moving out of the rotating groove 23. The slot 21 provides a space for accommodating the support rod 20. The support rod 20 is fixed in the slot 21 and cannot rotate. Therefore, when the threshing shaft 3 rotates, it will rotate along the rotating groove 23 and the socket 22. The connecting seat 5 provides a stable support for the threshing shaft 3, making the threshing shaft 3 more stable.

[0078] See also Figure 8-Figure 11 An inclined plate 11 is fixedly installed on the outer wall of the squeezing ball 7. The inclined plate 11 is trapezoidal. The outer wall of the inclined plate 11 is close to the inner wall of the threshing shaft 3. The threshing shaft 3 is provided with a cavity 17 for the reciprocating movement of the connecting plate 18. The reciprocating screw rod 16 is located inside the cavity 17. The top end of the reciprocating screw rod 16 is rotatably connected to the inner top wall of the cavity 17. The connection between the reciprocating screw rod 16 and the support rod 20 is rotatably connected to the inner bottom wall of the cavity 17. The cavity 17 is connected to the two strip openings 8.

[0079] The outer wall of the inclined plate 11 is against the outer wall of the threshing shaft 3, so when the squeezing ball 7 moves with the spiral rod 6, the inclined plate 11 will help shovel up the corn cob close to the inner wall of the threshing shaft 3. When the corn cob is scooped up by the inclined plate 11, the corn cob will slide along the inclined surface of the inclined plate 11 to the squeezing ball 7, and then the corn cob will pass over the squeezing ball 7, so that the corn cob can be easily scooped up and pushed to the grille by the squeezing ball 7. The cavity 17 provides a space for the reciprocating screw rod 16 to be placed, and provides a space for the connecting plate 18 to move back and forth.

[0080] See also Figure 1-Figure 11The present invention also provides a corn harvester having a corn harvester grain recovery mechanism of any of the above embodiments, wherein the corn harvester body 1 further comprises: the corn harvester body 1 moves along the corn row, a straw divider at the front end of the cutting platform separates the corn plants from the rows in the field and guides them into the cutting platform, a straw supporter straightens the fallen or tilted corn plants for subsequent cutting and transportation, and a cutter installed under the cutting platform uses the shear force generated by high-speed rotation to cut off the corn stalks from the roots, so that the corn plants are separated from the ground;

[0081] The cut corn stalks are collected by the auger in the header and pushed backward. The auger collects the corn stalks from both sides of the header to the middle and transports them backward through its own rotation, so that the corn stalks enter the subsequent conveying device in an orderly manner. The corn stalks pushed by the auger are then continuously transported backward by the conveying chain or conveyor belt.

[0082] During the transportation process, when the corn stalks pass through the ear picking rollers, the corn cobs will be squeezed and separated from the stalks under the rotation and squeezing action of the rollers, and the stem pulling rollers and the ear picking rollers work together to pull the corn stalks downward, further promoting the separation of corn ears from the stalks, and the separated corn ears will enter the peeling device. When the corn ears pass between the peeling rollers, the corn husks are peeled off the ears by the rotation of the peeling rollers and the friction with the ears, and then the corn ears are pushed to move axially by the screw conveyor, so that the peeled corn ears are transported from the peeling device to the entrance of the threshing drum 2, and then the corn enters the threshing drum 2.

Claims

1. A corn harvester grain recovery mechanism, comprising a corn harvester body (1) and a threshing drum (2), wherein a threshing shaft (3) is connected to the interior of the threshing drum (2), and the threshing shaft (3) is provided with a plurality of threshing teeth (4) distributed at intervals in a spiral along the outer peripheral wall thereof, characterized in that: Also includes, A spiral rod (6) is sleeved on the threshing shaft (3) so as to reciprocate along the axis of the threshing shaft (3) and is used to push the corn to move closer to the threshing drum (2); The spiral rod (6) is divided into two parts in the length direction, the part close to the feed opening of the threshing drum (2) is of equal diameter, and the part close to the discharge opening of the threshing drum (2) has a rod diameter that gradually increases from the feed opening to the discharge opening; return include, The squeezing ball (7) is elastic and has a through hole (12) extending therethrough. The squeezing ball (7) is sleeved on the spiral rod (6), and a gap is provided between the inner wall of the squeezing ball (7) and the outer wall of the spiral rod (6); An elastic member (14), wherein at least one elastic member (14) is arranged in the vertical direction of the gap, and two ends of the elastic member (14) are respectively connected to the inner wall of the extrusion ball (7) and the outer wall of the spiral rod (6).

2. A corn harvester grain recovery mechanism as claimed in claim 1, characterized in that: There is at least one spiral rod (6), and the pitch of the spiral rod (6) is an integral multiple of the spacing between the threshing teeth (4).

3. A corn harvester grain recovery mechanism as claimed in claim 2, characterized in that: A fixing ring (15) is arranged inside the through opening (12), and a gap is provided between the outer wall of the fixing ring (15) and the inner wall of the through opening (12). The fixing ring (15) is sleeved on the spiral rod (6) and is rotatably connected to the spiral rod (6). The elastic member (14) is initially arc-shaped, there are two elastic members (14), the inner arcs of two adjacent elastic members (14) correspond to each other, and one end of the elastic member (14) away from the squeezing ball (7) is connected to the outer wall of the fixing ring (15).

4. A corn harvester grain recovery mechanism as claimed in claim 3, characterized in that: Two notches (13) are symmetrically arranged on the squeezing ball (7), the notches (13) are connected to the through opening (12), and two elastic members (14) are located at the bottom of one of the notches (13).

5. A corn harvester grain recovery mechanism as claimed in claim 4, characterized in that: A rough treatment is performed on the side wall of the spiral rod (6) near the feed opening of the threshing drum (2) other than the contacting part with the threshing shaft (3).

6. A corn harvester grain recovery mechanism as claimed in claim 5, characterized in that: A driving mechanism, a connecting plate (18) slidably arranged inside the threshing shaft (3), with two ends respectively connected to the two screw rods (6) and used for driving the two screw rods (6) to move back and forth along the threshing shaft (3); Two strip-shaped openings (8) for the connecting plate (18) to reciprocate are horizontally arranged on both sides of the threshing shaft (3); A connecting portion is fixed inside the corn harvester body (1), one end of the threshing shaft (3) extends to the outside of the threshing drum (2) and is rotatably connected to one end of the connecting portion; A support rod (20) is inserted into the threshing shaft (3), the bottom end of which extends to the outside of the threshing shaft (3) and is connected to the connecting portion, the top end of which is connected to a reciprocating screw rod (16), and the connecting plate (18) is threadedly connected to the reciprocating screw rod (16); Two strip plates (9) are installed on the top and bottom of the connecting plate (18); the threshing shaft (3) is provided with a plurality of receiving grooves (19); the strip plates (9) are located inside the receiving grooves (19) and are slidably connected to the receiving grooves (19); the receiving grooves (19) are communicated with the strip openings (8); the strip plates (9) are located inside the strip openings (8); the outer walls of the strip plates (9) abut against the inner walls of the strip openings (8); the two strip plates (9) above the connecting plate (18) are respectively located inside the two upper receiving grooves (19) and are slidably connected thereto; and the two strip plates (9) below the connecting plate (18) are respectively located inside the two lower receiving grooves (19) and are slidably connected thereto.

7. A corn harvester grain recovery mechanism as claimed in claim 6, characterized in that: The connecting portion comprises a connecting seat (5) having one end connected to the inner wall of the corn harvester body (1), the connecting seat (5) being provided with a socket (22) and a rotating groove (23), the bottom end of the threshing shaft (3) being inserted into the rotating groove (23) through the socket (22) and being rotatably connected with the rotating groove (23), the threshing shaft (3) being provided with an annular groove (10), the inner top wall of the rotating groove (23) being abutted against the inner bottom wall of the annular groove (10), the inner bottom wall of the rotating groove (23) being abutted against the bottom end of the threshing shaft (3), the inner wall of the socket (22) being abutted against the inner wall of the annular groove (10), the interior of the connecting seat (5) being provided with a slot (21), the end of the support rod (20) extending to the outside of the threshing shaft (3) extending to the inside of the slot (21) and being connected to the inner wall of the slot (21), the slot (21) being communicated with the rotating groove (23).

8. A corn harvester grain recovery mechanism as claimed in claim 7, characterized in that: An inclined plate (11) is mounted on the outer wall of the squeezing ball (7). The inclined plate (11) is trapezoidal. The outer wall of the inclined plate (11) is close to the inner wall of the threshing shaft (3). The threshing shaft (3) is provided with a cavity (17) for the connecting plate (18) to reciprocate. The reciprocating screw rod (16) is located inside the cavity (17). The top end of the reciprocating screw rod (16) is rotatably connected to the inner top wall of the cavity (17). The connection between the reciprocating screw rod (16) and the support rod (20) is rotatably connected to the inner bottom wall of the cavity (17). The cavity (17) is connected to two strip-shaped openings (8).

9. A corn harvester, characterized in that: A corn harvester grain recovery mechanism having the structure described in any one of claims 1 to 8.

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