A corn planter

Abstract

The present invention discloses a corn seeder, which belongs to the technical field of corn sowing. It mainly includes a seeding mechanism, which includes a seeding shell, a front seeding wheel and a rear seeding wheel that are rotatably arranged inside the seeding shell, a drive swivel fixedly connected to the center of the rear seeding wheel, and a replacement swivel fixedly connected to the outside of the drive swivel, and a drive assembly and a replacement assembly are arranged in the center of the seeding shell. The drive assembly includes a drive motor fixedly connected to the front side wall of the seeding shell via a fixed frame, and the output shaft of the drive motor is fixedly connected to a transmission shaft, and a drive ratchet is arranged at the rear of the transmission shaft, and the drive ratchet corresponds to the drive swivel. By providing the front seeding wheel and the rear seeding wheel, the front seeding wheel and the rear seeding wheel rotate relative to each other, and the gap and depth between the first and second half slots can be adjusted to accommodate the sowing operation of corn seeds of different sizes. The present invention is mainly used for sowing corn.

Description

Technical Field

[0001] The present invention belongs to the technical field of corn sowing, and in particular relates to a corn sowing machine. Background Art

[0002] A corn planter is an agricultural machine specially used for sowing corn seeds. It is also suitable for sowing other crops such as soybeans. The corn planter has the characteristics of uniform sowing, consistent depth, stable row spacing, good soil covering, seed saving, and high work efficiency. With the progress of the times, corn planters will continue to have more functions and promote the process of agricultural modernization.

[0003] A Chinese patent with publication number "CN118844164A" discloses a precision corn seeding device with automatic reseeding, including a seeding mechanism, which includes a front cover and a rear cover. A seed outlet is provided at the bottom end of the rear cover, and a seed protection plate is fixed on the inner wall of the front cover. The side edges of the seed protection plate are chamfered to provide a support force pointing towards the spoon nest for the seeds in the spoon nest, thereby preventing the seeds from being missed due to centrifugal force, vibration or tilting in the spoon nest.

[0004] During the later use process, the device also had the following problems: different varieties of corn seeds have different sizes. When using a corn planter, larger corn seeds may cause missed sowing, and smaller corn seeds may be re-sown. The corn planter cannot flexibly replace parts such as the scoop nest to adapt to different varieties of corn seeds, resulting in uneven sowing of the planter and affecting the sowing effect. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to overcome the shortcomings of the existing technology and provide a corn seeder, which, by setting a front seed wheel and a rear seed wheel, can adjust the gap and depth between half groove one and half groove two to adapt to the sowing operation of corn seeds of different sizes.

[0006] The described corn planter comprises a frame, a walking wheel rotatably connected to the frame, a ditching wedge and a covering plate are fixedly connected to the bottom of the frame, the top of the frame is fixedly connected to the seed bin, and the bottom of the seed bin is fixedly connected to the seed discharging mechanism. The seed discharging mechanism comprises a seed shell, the top of the seed shell is fixedly provided with a seed inlet pipe opening, the bottom of the seed shell is fixedly provided with a seed outlet pipe opening, a sensor is fixedly installed on the side wall of the seed shell, an adjusting frame opening is fixedly opened at the front of the seed shell, a lower pressure plate is fixedly connected to the rear inner wall of the seed shell, a front seed wheel and a rear seed wheel are rotatably provided inside the seed shell, the center of the rear seed wheel is fixedly connected to a driving swivel, the outer side of the driving swivel is fixedly connected to a filling swivel, and a driving assembly and a filling assembly are provided in the center of the seed shell. The driving assembly comprises a driving motor, the driving motor is fixedly connected to the front side wall of the seed shell through a fixed frame, the output shaft of the driving motor is fixedly connected to the transmission shaft, and a driving ratchet is provided at the rear of the transmission shaft, and the driving ratchet corresponds to the driving swivel.

[0007] Preferably, a fixed block is fixedly connected to the front side wall of the front row seed wheel, and multiple groups of half grooves are fixedly opened on the rear side wall of the front row seed wheel. An adjustment block is fixed on the inner side of the half groove, a limiting ramp is fixed on the inner side of the adjustment block, and an elastic claw is fixedly connected to the inner side of the limiting ramp.

[0008] Preferably, a rotation groove is fixedly provided on the rear side wall of the rear row seed wheel, and the rotation groove is provided to avoid interference between the rear row seed wheel and the lower pressure plate. A plurality of groups of half grooves are fixedly provided on the front side wall of the rear row seed wheel, and an adjusting ring seat is fixedly connected to the inner side of the half groove. A limiting component is provided on the adjusting ring seat, and an axial clamping tube is fixedly provided on the inner side of the adjusting ring seat. A plurality of groups of buckle grooves are fixedly provided on the axial clamping tube, and the buckle grooves cooperate with elastic claws. A slot is axially provided on the buckle groove, and the slot extends backward out of the rear row seed wheel.

[0009] Preferably, groove one, groove two and groove three are fixedly provided on the adjustment ring seat, the groove depth of groove two is smaller than that of groove one, the groove depth of groove three is larger than that of groove one, groove one, groove two and groove three all correspond to the adjustment block, and when the adjustment block is stuck in different grooves, the gap width between the front row seed wheel and the rear row seed wheel can be changed, and the side walls of one end of groove one, groove two and groove three are all rounded, and multiple groups of sliding openings are fixedly provided on the adjustment ring seat, and the positions of the sliding openings correspond to the positions of half groove two.

[0010] Preferably, the limit assembly is slidably connected to the slide, and the top of the limit assembly is fixedly connected to a top plate, which slides with the second inner wall of the half groove, and the bottom of the limit assembly is fixedly provided with a contact ball, and the upper part of the contact ball is fixedly connected to a compression spring 1, and the other end of the compression spring 1 is fixedly connected to the adjusting ring seat, and the contact ball is in sliding contact with the limit ramp, and the rear of the contact ball is fixedly connected to a pressure rod, which extends backward into the rotating groove and cooperates with the lower pressure plate. When the limit assembly follows the rear seed wheel to rotate to the bottom, the pressure rod contacts the lower pressure plate, and the pressure rod is gradually pushed downward by the lower pressure plate, driving the limit assembly to extend to the bottom.

[0011] Preferably, a limit slider is fixedly provided on the outer wall of the transmission shaft, a connecting groove is fixedly opened at the rear of the transmission shaft, a second compression spring is fixedly connected to the inner wall of the connecting groove, the other end of the second compression spring is fixedly connected to the driving ratchet, and the driving ratchet is circumferentially fixed to the connecting groove.

[0012] Preferably, the replacement assembly includes a replacement push tube, which is rotatably connected to a connecting frame on the front end outer wall of the replacement push tube, and electric push rods are fixedly connected on both sides of the connecting frame, and the push rods of the electric push rod are fixedly connected to the front side walls of the seed shell, and a limited sliding groove is fixedly provided on the front inner wall of the replacement push tube, and the limiting sliding groove is slidably connected to the limiting sliding block, and a guide protrusion is fixedly provided on the rear inner wall of the replacement push tube, and a convex plate is fixedly connected to the outer wall of the rear end of the replacement push tube, and an unlocking pull ring is provided on the convex plate, and a replacement ratchet is rotatably contacted on the inner wall of the replacement push tube, and the front end of the replacement ratchet is fixedly connected to a compression spring three, and the other end of the compression spring three is fixedly connected to the transmission shaft, and the inner wall of the replacement ratchet is in rotational contact with the transmission shaft, and a guide groove is fixedly provided on the outer wall of the replacement ratchet, and the guide groove is in sliding contact with the guide protrusion, and the replacement ratchet corresponds to the replacement swivel seat.

[0013] Preferably, a tension spring is fixedly connected to the inner wall of the front end of the unlocking pull ring, the other end of the tension spring is fixedly connected to the convex plate, and the rear end of the unlocking pull ring is fixedly connected to multiple sets of push rods, the push rods are slidably connected to the slots, and the push rods cooperate with elastic claws. When the push rods slide forward along the slots, the push rods push the elastic claws out of the buckle slots.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By setting the front seed wheel and the rear seed wheel, the front seed wheel and the rear seed wheel rotate relative to each other, and the gap and depth between the half groove one and the half groove two can be adjusted to adapt to the sowing operation of corn seeds of different sizes.

[0016] 2. By setting the drive swivel and the drive assembly, the drive assembly drives the rear seed wheel by engaging with the drive swivel, and the filling assembly cooperates with the filling swivel. When the sensor detects that there is a lack of seeds in the half slot, the electric push rod starts, driving the filling assembly to move backward, the filling assembly engages with the filling swivel, and pushes the rear seed wheel to speed up the rotation speed, rotating a certain angle more than when only the drive assembly rotates, so that the corn seeds in the rear half slot can be quickly rotated forward one position for filling operations.

[0017] 3. By setting up elastic claws, the front and rear seed wheels can be locked axially, and the front and rear seed wheels can be locked circumferentially in conjunction with the adjusting block and the adjusting ring seat to avoid accidental misalignment between the two during the seeding process, resulting in seed jamming and affecting the seeding effect.

[0018] 4. By setting an axial clamping tube, when it cooperates with the elastic clamping claw, the front and rear seed wheels after the posture is adjusted can be axially locked. When the axial clamping tube cooperates with the unlocking pull ring, the unlocking pull ring can fill the slot and squeeze the elastic clamping claw outward into the buckle groove to complete the unlocking of the front and rear seed wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the front structure of the seed-discharging mechanism;

[0021] Figure 3 This is a schematic diagram of the rear structure of the seed-discharging mechanism;

[0022] Figure 4 Schematic diagram of the internal structure of the seed arrangement mechanism;

[0023] Figure 5 Schematic diagram of the rear structure of the rear seed wheel;

[0024] Figure 6 Schematic diagram of the internal structure of the seed shell;

[0025] Figure 7 It is a schematic diagram of the explosion structure of the front seed wheel and the rear seed wheel;

[0026] Figure 8 Schematic diagram of the explosion mechanism of the front seed wheel, rear seed wheel and limit assembly;

[0027] Figure 9 Schematic diagram of the rear structure of the front seed wheel

[0028] Figure 10 This is a schematic diagram of the front structure of the rear seed wheel;

[0029] Figure 11 for Figure 10 A magnified view of the structure at point A;

[0030] Figure 12 This is a schematic diagram of the cooperation of the rear seed wheel inside the seed shell;

[0031] Figure 13 It is a structural diagram of the limit component;

[0032] Figure 14 This is a schematic diagram of the structure of the adjusting ring seat on the rear seed wheel;

[0033] Figure 15 Schematic diagram of the matching structure of the unlocking pull ring and buckle groove with the rear seed wheel;

[0034] Figure 16 Schematic diagram of the internal structure of the front seed wheel and the rear seed wheel;

[0035] Figure 17 Schematic diagram of the matching structure of the push tube and the unlocking pull ring;

[0036] Figure 18 A schematic diagram of the structure of the unlocking pull ring;

[0037] Figure 19 It is a schematic diagram of the overall structure of the drive component and the filling component;

[0038] Figure 20 This is a schematic diagram of the exploded structure of the drive component and the replacement component;

[0039] Figure 21 It is a structural diagram of the push tube and the transmission shaft;

[0040] Figure 22 It is a structural diagram of the replacement ratchet and transmission shaft;

[0041] Figure 23 Schematic diagram of the internal structure of the transmission shaft and driving ratchet.

[0042] In the figure, 1, frame; 101, walking wheel; 102, trenching wedge; 103, soil cover; 2, seed bin; 3, seed shell; 301, seed inlet; 302, seed outlet; 303, sensor; 304, adjustment frame; 305, lower pressure plate; 4, front seed wheel; 401, fixed block; 402, half groove one; 403, adjustment block; 404, limit ramp; 405, elastic claw; 5, rear seed wheel; 501, adjustment ring seat; 501A, groove one; 501B, groove two; 501C, groove three; 501D, slide; 502, half groove two; 503, limit assembly; 503A, top plate; 503B, compression spring one; 503C, contact Ball; 503D, pressure rod; 504, rotating groove; 505, axial clamping tube; 505A, buckle groove; 505B, slot; 506, replacement swivel seat; 507, drive swivel seat; 6, drive assembly; 601, drive motor; 602, transmission shaft; 602A, limiting slider; 602B, connecting groove; 603, drive ratchet; 604, compression spring two; 7, replacement assembly; 701, replacement push tube; 701A, limiting slide groove; 701B, guide protrusion; 701C, protruding plate; 702, connecting frame; 703, electric push rod; 704, replacement ratchet; 704A, guide groove; 704B, compression spring three; 8, unlocking pull ring; 801, push rod; 802, tension spring. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings:

[0044] The directional terms used in the detailed description are intended solely to facilitate understanding of the technical solutions described herein by those skilled in the art based on the visual orientation shown in the accompanying drawings. Unless otherwise specified or limited, the terms "dispose," "install," and "connect" are to be interpreted broadly, and those skilled in the art will understand their specific meanings within the present invention based on the specific circumstances.

[0045] like Figure 1 、 Figure 2 and Figure 3 As shown, a corn planter includes a frame 1, a running wheel 101 is rotatably connected to the frame 1, a trenching wedge 102 and a covering plate 103 are fixedly connected to the bottom of the frame 1, a seed bin 2 is fixedly connected to the top of the frame 1, and a seeding mechanism is fixedly connected to the bottom of the seed bin 2. The running wheel 101 drives the planter forward, and the trenching wedge 102 digs trenches on the land. After the corn seeds are taken from the seed bin 2 by the seeding mechanism, the single grains fall into the dug trenches, and then the covering plate 103 gathers the soil to bury the corn seeds. Figure 4 、 Figure 5 and Figure 6As shown, the seeding mechanism includes a seeding shell 3, a seed inlet pipe 301 is fixedly provided on the top of the seeding shell 3, a seed outlet pipe 302 is fixedly provided at the bottom of the seeding shell 3, and a sensor 303 is fixedly installed on the side wall of the seeding shell 3. The corn seeds enter the half groove from the seed inlet pipe 301 and rotate with the seeding wheel. When it moves to the position of the sensor 303, the sensor 303 scans the half groove to determine whether there are corn seeds in the half groove. If it is indeed corn seeds, the reseeding component is started to perform the reseeding operation, and the corn seeds are finally discharged from the seed outlet pipe 302 at the bottom into the soil to complete the sowing operation; an adjustment frame opening 304 is fixedly opened at the front of the seeding shell 3. By setting the adjustment frame opening 304, the user can directly rotate and adjust the front seed wheel 4, so that the front seed wheel 4 rotates relative to the rear seed wheel 5, and the width gap between the two is adjusted.

[0046] The lower pressure plate 305 is fixedly connected to the inner wall of the rear portion of the seed shell 3, and a front seed wheel 4 and a rear seed wheel 5 are provided for rotation inside the seed shell 3. By setting the front seed wheel 4 and the rear seed wheel 5, when the two are locked and rotated synchronously, the corn seeds can be sown. When the two are unlocked and allowed to rotate relative to each other, the adjusting block 403 is stuck in the grooves of different depths, so that the gap between the front seed wheel 4 and the rear seed wheel 5 is expanded or reduced. At the same time, due to the change in the gap between the two, the contact point of the limiting component 503 and the limiting ramp 404 is changed. The larger the gap, the closer the contact point is to the center, and the deeper the depth in the half groove is, which is suitable for sowing corn seeds of larger size. Conversely, by rotating the front seed wheel 4, the front seed wheel 4 and the rear seed wheel 5 rotate relative to each other, and the gap and depth of the half groove 1 402 and the half groove 2 502 can be adjusted to adapt to the sowing operation of corn seeds of different sizes.

[0047] The center of the rear seed wheel 5 is fixedly connected to a driving swivel seat 507, and the outer side of the driving swivel seat 507 is fixedly connected to a filling swivel seat 506. The driving swivel seat 507 cooperates with the driving component 6. The driving component 6 drives the rear seed wheel 5 by engaging with the driving swivel seat 507. The filling component 7 cooperates with the filling swivel seat 506. When the sensor 303 detects that there is a lack of seeds in the half slot, the electric push rod 703 starts, drives the filling component to move backward, and the filling component 7 engages with the filling swivel seat 506, and pushes the rear seed wheel 5 to speed up the rotation speed, and rotates a certain angle more than when it rotates only by the driving component 6, so that the corn seeds in the rear half slot can quickly rotate forward one position for filling operations. The center of the seed shell 3 is provided with a driving component 6 and a filling component 7, such as Figure 19As shown, the drive assembly 6 includes a drive motor 601, which is fixedly connected to the front side wall of the seed shell 3 through a fixed frame. The output shaft of the drive motor 601 is fixedly connected to the transmission shaft 602. The rear of the transmission shaft 602 is provided with a drive ratchet 603, and the drive ratchet 603 corresponds to the drive swivel 507.

[0048] like Figure 7 and Figure 9 As shown, a fixing block 401 is fixedly connected to the front side wall of the front seed wheel 4. The fixing block 401 allows the user to directly grasp the fixing block 401 and push the front seed wheel 4 to rotate, thereby changing the width gap between the front seed wheel 4 and the rear seed wheel 5. The rear side wall of the front seed wheel 4 is fixedly provided with multiple sets of half-slots 402. Adjustment blocks 403 are fixedly installed inside the half-slots 402. A limiting ramp 404 is fixed inside the adjusting blocks 403. The closer the limiting ramp 404 is to the side wall of the front seed wheel 4, the larger its diameter and width. When the limiting assembly 503 is engaged with this position, it is located at the outer side of the half-slot, and the depth of the half-slot is shallow, suitable for accommodating smaller corn varieties. The farther the limiting ramp 404 is from the side wall of the front seed wheel 4, the smaller its diameter and width. When the limiting assembly 503 is engaged with this position, it is located at the inner side of the half-slot, and the depth of the half-slot is deep, suitable for accommodating larger corn varieties. An elastic claw 405 is fixedly connected to the inner side of the limiting ramp 404. By setting the elastic claw 405, the front row seed wheel 4 and the rear row seed wheel 5 can be axially locked, and the front row seed wheel 4 and the rear row seed wheel 5 can be circumferentially locked in conjunction with the adjustment block 403 and the adjustment ring seat 501 to avoid accidental misalignment between the two during the seeding process, resulting in seed jamming and affecting the seeding effect.

[0049] like Figure 8 、 Figure 10 and Figure 11As shown, a rotation groove 504 is fixedly provided on the rear side wall of the rear seed wheel 5 to avoid interference between the rear seed wheel 5 and the lower pressure plate 305. A plurality of groups of half grooves 2 502 are fixedly provided on the front side wall of the rear seed wheel 5. The half grooves 2 502 cooperate with the half grooves 1 402 to accommodate corn seeds for sowing operations. An adjusting ring seat 501 is fixedly connected to the inner side of the second half groove 502, and the adjusting ring seat 501 cooperates with the adjusting block 403. By changing the contact position of the two, the second half groove 502 and the first half groove 402 can accommodate corn seeds of different sizes; a limiting component 503 is provided on the adjusting ring seat 501, and an axial clamping tube 505 is fixedly provided on the inner side of the adjusting ring seat 501. The axial clamping tube 505 is fixedly provided with multiple groups of buckle grooves 505A, which cooperate with the elastic clamping claws 405. A slot 505B is axially provided on the buckle groove 505A, and the slot 505B extends backward to form the rear seed wheel 5. By setting an axial clamping tube 505, when it cooperates with the elastic clamping claw 405, the front row seed wheel 4 and the rear row seed wheel 5 after the posture is adjusted can be axially locked. When the axial clamping tube 505 cooperates with the unlocking pull ring 8, the unlocking pull ring 8 can fill the slot 505B, and squeeze the elastic clamping claw 405 outward into the buckle groove 505A, thereby completing the unlocking of the front row seed wheel 4 and the rear row seed wheel 5.

[0050] like Figure 14 As shown, the adjusting ring seat 501 is fixed with groove 1 501A, groove 2 501B and groove 3 501C. The groove depth of groove 2 501B is less than that of groove 1 501A, and the groove depth of groove 3 501C is greater than that of groove 1 501A. Grooves 1 501A, grooves 2 501B and grooves 3 501C all correspond to the adjusting block 403. When the adjusting block 403 is inserted into different grooves, the gap width between the front seed wheel 4 and the rear seed wheel 5 can be changed. The sidewalls of groove 1 501A, groove 2 501B, and groove 3 501C are all rounded at one end. This rounding allows the adjustment block 403 to slide out of the groove at the rounded corner when the front seed wheel 4 is rotated. The other sidewalls of groove 1 501A, groove 2 501B, and groove 3 501C are all right-angled, which allows the driving torque of the rear seed wheel 5 to be transmitted to the front seed wheel 4 through the adjustment block 403, allowing the two to rotate synchronously. Multiple groups of sliding openings 501D are fixedly provided on the adjustment ring seat 501. The positions of the sliding openings 501D correspond to the positions of the half grooves 502. The bottom of each group of half grooves 502 is provided with a sliding opening 501D to facilitate the installation of the limit assembly 503 on the half grooves 502.

[0051] like Figure 12 、 Figure 13 and Figure 16As shown, the limiting component 503 is slidably connected to the sliding port 501D, and a top plate 503A is fixedly connected to the top of the limiting component 503. The top plate 503A slides with the inner wall of the second half groove 502. The position of the top plate 503A inside the second half groove 502 determines the size of the space for accommodating corn seeds. A contact ball 503C is fixedly provided at the bottom of the limiting component 503. The upper part of the contact ball 503C is fixedly connected to a compression spring 1 503B. The other end of the compression spring 1 503B is fixed to the adjusting ring seat 50 1 is fixedly connected, the contact ball 503C is in sliding contact with the limiting ramp 404, and a pressure rod 503D is fixedly connected to the rear of the contact ball 503C. The pressure rod 503D extends backward into the rotating groove 504, and the pressure rod 503D cooperates with the lower pressure plate 305. When the limiting assembly 503 rotates to the bottom following the rear seed wheel 5, the pressure rod 503D contacts the lower pressure plate 305. The pressure rod 503D is gradually squeezed downward by the lower pressure plate 305, driving the limiting assembly 503 to extend to the bottom. Under the push of the elastic force of the compression spring 503B, the contact ball 503C maintains contact with the limiting ramp 404, and the position of the top plate 503A inside the half groove remains fixed, which can accommodate corn seeds and carry out sowing operations on corn seeds. When the limiting component 503 follows the rear seed wheel 5 to move to the bottom, the pressure rod 503D on the limiting component 503 gradually contacts the lower pressure plate 305 and is squeezed by the lower pressure plate 305, so that the limiting component 503 overcomes the thrust of the compression spring 503B and extends outward, and the top plate 503A pushes the corn seeds in the half groove outward to prevent the corn seeds from being stuck in the half groove and affecting the sowing effect.

[0052] like Figure 22 and Figure 23 As shown, a limiting slider 602A is fixedly mounted on the outer wall of the transmission shaft 602. A connecting slot 602B is fixedly formed at the rear of the transmission shaft 602. A second compression spring 604 is fixedly mounted on the inner wall of the connecting slot 602B. The other end of the second compression spring 604 is fixedly connected to a driving ratchet 603, which is circumferentially fixed to the connecting slot 602B. The power of the driving motor 601 is transmitted to the driving ratchet 603 via the transmission shaft 602. Driven by the second compression spring 604, the driving ratchet 603 engages with the driving rotating seat 507, driving the rear seed wheel 5 to rotate, thereby sowing corn seeds.

[0053] like Figure 20 and Figure 21As shown, the replacement component 7 includes a replacement push tube 701. When it is detected that the corn seeds in the half groove are missing, the electric push rod 703 drives the replacement push tube 701 to move backward a distance. The replacement push tube 701 slides backward relative to the transmission shaft 602, squeezing the replacement ratchet 704. Since the replacement ratchet 704 is blocked by the replacement rotating seat 506 and cannot continue to slide backward, under the guiding and limiting action of the guide protrusion 701B and the guide groove 704A, the replacement ratchet 704 rotates relative to the transmission shaft 602, pushing the rear seed wheel 5 to rotate again at a certain angle based on the original speed. The angle of this rotation is just enough to allow the seed wheel to rotate through a half groove, allowing the half groove without corn seeds to quickly leave the seed pipe outlet 302, allowing the subsequent half groove to take over the replacement sowing, thereby avoiding affecting the sowing uniformity of corn seeds.

[0054] The front end outer wall of the replacement push tube 701 is rotatably connected to a connecting frame 702, and both sides of the connecting frame 702 are fixedly connected to electric push rods 703. The push rods of the electric push rods 703 are fixedly connected to the front side walls of the seed shell 3. A limited sliding groove 701A is fixedly provided on the front inner wall of the replacement push tube 701. The limited sliding groove 701A is slidably connected to the limited sliding block 602A. Through the cooperation of the limited sliding groove 701A and the limited sliding block 602A, the replacement push tube 701 and The transmission shaft 602 is fixed circumferentially; a guide protrusion 701B is fixedly provided on the inner wall of the rear part of the replacement push tube 701, and a protruding plate 701C is fixedly connected to the outer wall of the rear end of the replacement push tube 701. The protruding plate 701C is provided with an unlocking pull ring 8. When the replacement push tube 701 slides forward driven by the electric push rod 703, the unlocking pull ring 8 can be squeezed forward, and the unlocking pull ring 8 slides on the slot 505B, squeezing the elastic claw 405 out of the buckle slot 505A. There is a replacement ratchet 704 on the inner wall of the replacement push tube 701 in rotational contact, and the front end of the replacement ratchet 704 is fixedly connected to a compression spring 3 704B, and the other end of the compression spring 3 704B is fixedly connected to the transmission shaft 602. By setting the compression spring 3 704B, the replacement ratchet 704 can maintain contact and engagement with the replacement swivel seat 506; the inner wall of the replacement ratchet 704 is in rotational contact with the transmission shaft 602, and a guide groove 704A is fixedly opened on the outer wall of the replacement ratchet 704, and the guide groove 704A is in sliding contact with the guide protrusion 701B, and the replacement ratchet 704 corresponds to the replacement swivel seat 506.

[0055] like Figure 15 、 Figure 17 and Figure 18 As shown, a tension spring 802 is fixedly connected to the inner wall of the front end of the unlocking pull ring 8, and the other end of the tension spring 802 is fixedly connected to the convex plate 701C. A plurality of push rods 801 are fixedly connected to the rear end of the unlocking pull ring 8. The push rods 801 are slidably connected to the slot 505B, and the push rods 801 cooperate with the elastic claws 405. When the push rods 801 slide forward along the slot 505B, the push rods 801 push the elastic claws 405 out of the buckle groove 505A.

[0056] Working principle of adapting to different size corn varieties:

[0057] 1. The electric push rod 703 drives the replacement push tube 701 to move forward a certain distance. The tension spring 802 is compressed, and the unlocking pull ring 8 moves forward. The push rod 801 on it slides along the slot 505B, squeezing the elastic claw 405 out of the buckle slot 505A, completing the axial unlocking of the front seed wheel 4 and the rear seed wheel 5, allowing them to rotate relative to each other;

[0058] 2. The user adjusts the frame opening 304 and pushes the fixed block 401 to rotate the front seed wheel 4. The rear seed wheel 5 stops rotating due to the friction force. At this time, the front seed wheel 4 rotates relative to the rear seed wheel 5.

[0059] 3. The adjusting block 403 rotates on the adjusting ring seat 501. When the adjusting block 403 cooperates with different grooves, the width between the front seed wheel 4 and the rear seed wheel 5 changes due to the different groove depths of the grooves. This also causes the contact point between the contact ball 503C at the bottom of the limiting assembly 503 and the limiting ramp 404 to change, and the initial position of the top plate 503A in the half groove to change.

[0060] 4. When the adjustment block 403 is engaged with the second groove 501B, the distance between the front seed wheel 4 and the rear seed wheel 5 is maximized, and the top plate 503A is initially located at the bottom of the second half groove 502. At this time, the width and depth are both maximized, which can accommodate larger corn seeds.

[0061] 5. After the adjustment is completed, the electric push rod 703 is controlled to drive the replacement push tube 701 to move backward to the initial middle position. The tension spring 802 pulls the unlocking pull ring 8 to move backward. The push rod 801 moves to the last position of the slot 505B and disengages from the buckle slot 505A, allowing the elastic claw 405 to clamp the buckle slot 505A, thereby axially fixing the front seed wheel 4 and the rear seed wheel 5.

[0062] How the missed corn seed replanting operation works:

[0063] 1. As the front seed wheel 4 and the rear seed wheel 5 rotate, the sensor 303 detects the corn seeds in the first half slot 402 and the second half slot 502. When it is determined that there are no corn seeds in the half slot, the electric push rod 703 is controlled to drive the filling push tube 701 to move backward a distance;

[0064] 2. The guide protrusion 701B on the replacement push tube 701 squeezes the guide groove 704A, causing the guide groove 704A to engage with the replacement rotating seat 506 and push the replacement rotating seat 506 to rotate at a certain angle, so that the front seed wheel 4 and the rear seed wheel 5 rotate at a faster speed for a distance, allowing the half groove with corn seeds at the back to move forward and replace the half groove without seeds, thereby maintaining the continuity of corn sowing.

[0065] The present invention provides a front seed wheel 4 and a rear seed wheel 5, which rotate relative to each other, and can adjust the gap and depth between the first half groove 402 and the second half groove 502 to accommodate the sowing of corn seeds of different sizes. The elastic claw 405 is provided to axially lock the front seed wheel 4 and the rear seed wheel 5, and the adjustment block 403 and the adjustment ring seat 501 are used to circumferentially lock the front seed wheel 4 and the rear seed wheel 5, thereby preventing accidental misalignment of the two during the sowing process, which could cause seed jamming and affect the sowing effect. By setting an axial clamping tube 505, when it cooperates with the elastic clamping claw 405, the front row seed wheel 4 and the rear row seed wheel 5 after the posture is adjusted can be axially locked. When the axial clamping tube 505 cooperates with the unlocking pull ring 8, the unlocking pull ring 8 can fill the slot 505B, and squeeze the elastic clamping claw 405 outward into the buckle groove 505A, thereby completing the unlocking of the front row seed wheel 4 and the rear row seed wheel 5.

Claims

1. A corn planter, comprising a frame, a travel wheel rotatably connected to the frame, a trenching wedge and a cover plate fixedly connected to the bottom of the frame, a seed bin fixedly connected to the top of the frame, and a seed discharging mechanism fixedly connected to the bottom of the seed bin, characterized in that: The seeding mechanism includes a seeding shell, a seed inlet pipe port is fixedly provided on the top of the seeding shell, a seed outlet pipe port is fixedly provided on the bottom of the seeding shell, a sensor is fixedly installed on the side wall of the seeding shell, an adjustment frame port is fixedly opened on the front of the seeding shell, a lower pressure plate is fixedly connected to the rear inner wall of the seeding shell, a front seeding wheel and a rear seeding wheel are rotatably provided inside the seeding shell, the center of the rear seeding wheel is fixedly connected to a driving swivel seat, the outer side of the driving swivel seat is fixedly connected to a filling swivel seat, a driving assembly and a filling assembly are provided in the center of the seeding shell. The driving assembly includes a driving motor, the driving motor is fixedly connected to the front side wall of the seeding shell through a fixed frame, the output shaft of the driving motor is fixedly connected to a transmission shaft, a driving ratchet is provided at the rear of the transmission shaft, and the driving ratchet corresponds to the driving swivel seat; The front side wall of the front seed wheel is fixedly connected with a fixed block, and the rear side wall of the front seed wheel is fixed with multiple groups of half grooves, the inner side of the half grooves is fixed with an adjustment block, the inner side of the adjustment block is fixed with a limiting ramp, and the inner side of the limiting ramp is fixed with an elastic claw; The rear side wall of the rear seed wheel is fixed with a rotation groove, which is used to prevent the rear seed wheel from interfering with the lower pressure plate. A plurality of groups of half grooves are fixedly provided on the front side wall of the rear seed wheel. An adjusting ring seat is fixedly connected to the inner side of the half groove. A limiting component is provided on the adjusting ring seat. An axial clamping tube is fixedly provided on the inner side of the adjusting ring seat. A plurality of groups of buckle grooves are fixedly provided on the axial clamping tube. The buckle grooves cooperate with elastic claws. An axial slot is provided on the buckle slot, and the slot extends backward out of the rear seed wheel. The adjusting ring seat is fixedly provided with groove one, groove two and groove three, the groove depth of groove two is less than groove one, the groove depth of groove three is greater than groove one, groove one, groove two and groove three all correspond to the adjusting block, when the adjusting block is stuck in different grooves, the gap width between the front seed wheel and the rear seed wheel can be changed, one end side wall of groove one, groove two and groove three is processed by rounded corners, and multiple groups of sliding openings are fixedly provided on the adjusting ring seat, and the position of the sliding opening corresponds to the position of the half groove two; The limit assembly is slidably connected to the sliding mouth, and the top of the limit assembly is fixedly connected to a top plate, which slides with the second inner wall of the half groove. A contact ball is fixedly provided at the bottom of the limit assembly, and a compression spring is fixedly connected to the upper part of the contact ball. The other end of the compression spring is fixedly connected to the adjusting ring seat, and the contact ball slides in contact with the limit inclined platform. The rear of the contact ball is fixedly connected to a pressure rod, which extends backward into the rotating groove and cooperates with the lower pressure plate. When the limit assembly follows the rear seed wheel to rotate to the bottom, the pressure rod contacts the lower pressure plate, and the pressure rod is gradually squeezed downward by the lower pressure plate, driving the limit assembly to extend to the bottom; A limiting slider is fixedly provided on the outer wall of the transmission shaft, a connecting groove is fixedly opened on the rear part of the transmission shaft, a second compression spring is fixedly connected to the inner wall of the connecting groove, the other end of the second compression spring is fixedly connected to the driving ratchet, and the driving ratchet is circumferentially fixed to the connecting groove.

2. A corn planter according to claim 1, characterized in that: The replacement assembly includes a replacement push tube, which is rotatably connected to a connecting frame on the front end outer wall of the replacement push tube, and electric push rods are fixedly connected on both sides of the connecting frame. The push rods of the electric push rod are fixedly connected to the front side walls of the seed shell, and a limited sliding groove is fixedly provided on the front inner wall of the replacement push tube, and the limiting sliding groove is slidably connected to the limiting sliding block. A guide protrusion is fixedly provided on the rear inner wall of the replacement push tube, and a convex plate is fixedly connected to the outer wall of the rear end of the replacement push tube. An unlocking pull ring is provided on the convex plate, and a replacement ratchet is rotatably contacted on the inner wall of the replacement push tube. The front end of the replacement ratchet is fixedly connected to a compression spring three, and the other end of the compression spring three is fixedly connected to the transmission shaft, and the inner wall of the replacement ratchet is in rotational contact with the transmission shaft. A guide groove is fixedly provided on the outer wall of the replacement ratchet, and the guide groove is in sliding contact with the guide protrusion, and the replacement ratchet corresponds to the replacement swivel seat.

3. A corn planter according to claim 2, characterized in that: A tension spring is fixedly connected to the inner wall of the front end of the unlocking pull ring, and the other end of the tension spring is fixedly connected to the convex plate. A plurality of push rods are fixedly connected to the rear end of the unlocking pull ring. The push rods are slidably connected to the slots, and the push rods cooperate with elastic claws. When the push rods slide forward along the slots, the push rods push the elastic claws out of the buckle slots.

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