A seeding device suitable for use in a wheat test plot

Abstract

The application discloses a wheat test plot seeding device, which comprises a connecting assembly, a connecting support with an opening in the front-rear direction, a supporting support fixed in the opening of the connecting support, and a supporting plate fixedly connected to the lower side of the supporting support; a seeding assembly, m lifting lead screws rotatably connected between the upper end of the supporting support and the lower end of the connecting support, a lifting plate threadedly connected to the lifting lead screws, m+n groups of seed arranging units arranged on the connecting support, seed arranging devices arranged on the upper side of the supporting support and fixed to the lower end of the connecting support, seed guiding sleeves fixed to the lower side of the seed arranging devices and extending downward out of the supporting support, seed arranging pipes slidably connected to the seed guiding sleeves and arranged on the connecting support, and the lifting plate connected to the seed arranging pipes; when the lifting plate moves downward, the seed arranging devices are in action; and when the lifting plate moves upward, the seed arranging devices are not in action. When the application is used for seeding, the seeding frame does not need to be lifted and pressed, and one person can complete the seeding operation, thereby reducing the labor intensity.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery technology, and in particular to a sowing device suitable for wheat experimental plots. Background Technology

[0002] In agricultural research experiments, crop planting is generally conducted in plots. Before sowing within a plot, several planting furrow units spaced apart in the width direction are first dug in the plot's field. Each planting furrow unit consists of several long, narrow planting furrows spaced apart in the length direction. During furrowing, small ridges are formed on the field between adjacent planting furrows in the length direction, perpendicular to the width and length directions. In existing technology, a test plot sowing device is used for sowing. This device includes a handheld sowing frame, with a seed metering device fixedly connected to the upper end of the sowing frame. Several seed drop tubes spaced apart in the width direction are fixedly connected to the lower end of the sowing frame. Several connecting tubes are arranged at the bottom of the seed metering device, connecting to the corresponding seed drop tubes. During sowing, one person walks along the length direction within the plot holding the sowing frame. When they reach a small ridge in front of a long, narrow planting furrow, they stop, lower the sowing frame, and gently press it against the ground. Another person pours an appropriate amount of seeds into the seed metering device's inlet. The seeds are discharged along the connecting tubes by the seed metering device. The seeds in the connecting tubes fall into the corresponding seed dropping tubes, and the seeds falling from the seed dropping tubes fall into the corresponding long strip seed furrows, thus sowing one long strip seed furrow. The sowing frame is then lifted again to cross over to the next small ridge, and the above sowing steps are repeated to sow several long strip seed furrows. Although this method solves the technical problem that large seeders cannot sow in small plots, it requires repeated lifting and lowering of the sowing frame and the cooperation of two people to complete the sowing operation, which is cumbersome and labor-intensive. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the above and / or existing plot planting, the present invention is proposed.

[0005] Therefore, the problem that this invention aims to solve is that in the existing technology, stable sowing requires repeated lifting and lowering of the sowing frame during plot sowing, which is cumbersome and labor-intensive. In implementing this invention, the connecting bracket is installed on the frame of a small cart, which is pushed to move through the plot. During sowing, the lifting screw is controlled to rotate, causing the seed metering tube to move downwards, activating the seed metering device, and the seeds fall along the seed guide sleeve and seed metering tube. After the sowing operation of one seed furrow unit is completed, the lifting screw rotates in the opposite direction, the seed metering tube moves upwards away from the small furrow, and the small cart is pushed forward to the next seed furrow unit. By repeating the above steps, sowing of each seed furrow unit can be achieved sequentially without lifting and lowering the sowing frame. Only one person is needed to complete the sowing operation, reducing labor intensity.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a seeding device suitable for wheat experimental plots, comprising,

[0007] A connecting assembly includes a connecting bracket with an opening in the front-to-back direction, a support bracket fixedly connected inside the opening of the connecting bracket, and a support plate fixedly connected to the lower side of the support bracket;

[0008] The sowing assembly includes m vertically arranged lifting screws rotatably connected between the upper end of the support bracket and the lower end of the connecting bracket. Each lifting screw is threaded with a lifting plate. The connecting bracket is equipped with m+n seed metering units. Each seed metering unit includes several seed metering devices fixedly connected to the lower end of the connecting bracket on the upper side of the support bracket, where m is an integer not less than 2. A seed guide sleeve extending downwards from the support bracket is fixedly connected to the lower side of each seed metering device. A seed metering tube capable of being raised and lowered is connected to the connecting bracket. The upper part of the seed metering tube is slidably connected to the seed guide sleeve. The lifting plate is connected to several seed metering tubes. When the lifting plate moves downwards, the seed metering device moves; when the lifting plate moves upwards, the seed metering device does not move.

[0009] This invention is fixed to the frame of a small cart via a connecting bracket. A small seed box is fixed to the frame of the small cart, and a disc seed metering device is fixed to the lower side of the small seed box (the small seed box and disc seed metering device are existing technologies, and their connection method is also existing technology, not an improvement of this application). Each seed outlet of the disc seed metering device is fixedly connected to a connecting pipe at its lower end. Several seed drop tubes corresponding to the seed metering device are fixedly connected to the upper side of the connecting bracket, and the lower end of the connecting pipe is connected to the corresponding seed drop tube. In the initial state, the seed drop tubes are in a high position, that is, the bottom of the seed drop tubes is not lower than the top of the small furrow. The small cart is pushed to move within the row spacing between two adjacent seed furrow units. When the seed drop tubes move into the long strip seed furrow, the lifting screw rotates, which drives the lifting plate to rise and fall. Adjusting the rotation direction of the lifting screw causes the lifting plate to move down, which in turn drives the seed drop tubes to move down, and the seed drop tubes drive the seed dispensing. The device operates by metering seeds, which are sequentially passed through the corresponding seed guide sleeve and seed metering tube into the long seed furrow. When the lifting screw reaches the designed number of rotations, the seed metering tube moves to the lowest set position, and the lifting screw stops rotating, completing the sowing operation for one long seed furrow. The lifting screw then rotates in the opposite direction, moving the seed metering sleeve upwards and simultaneously pushing the small cart forward. After the seed metering sleeve returns to its original position, the lifting screw stops rotating. When passing over a small ridge, the seed metering sleeve rests above the ridge to prevent contact with the soil and to prevent the seed metering tube from accumulating mud and becoming blocked, thus preventing proper seed dispensing. When the seed metering tube moves to the next long seed furrow, the above sowing steps are repeated to complete the sowing operation for the next long seed furrow. By continuously repeating the above actions, the sowing operation for the same crop in the entire plot can be completed. The operation is simple, effortless, and reduces labor intensity.

[0010] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, at least one rotating screw sleeve is rotatably connected between the lower end of the support plate and the connecting bracket, the outer periphery of the rotating screw sleeve is provided with a spiral groove, and the outer periphery of the seed metering pipe is connected with a transmission column that is inserted into the spiral groove and can slide along the spiral groove.

[0011] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, it further includes several seed metering transmission components corresponding one-to-one with the rotating screw sleeve. The seed metering transmission component includes a seed metering transmission sleeve connected to the support plate. The seed metering transmission sleeve has at least two sliding holes arranged inside. The seed metering transmission sleeve is slidably connected to a pawl through the sliding holes. A ratchet is connected to the upper part of the rotating screw sleeve. Several transmission teeth are arranged on the outer periphery of the ratchet. The pawl can be inserted into the gap between any two transmission teeth on the outer periphery of the ratchet.

[0012] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, wherein: a seed metering transmission ring is fixedly connected to the outer side of the seed metering transmission sleeve and rotatably connected to the support plate; a return spring is connected to the end of the pawl away from the ratchet; and the end of the return spring away from the pawl is connected to the inner wall of the seed metering transmission ring.

[0013] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, wherein: the inner end of the pawl has an inclined transmission surface that can fit against the outer side of the transmission teeth; when the outer side of the ratchet rotates against the transmission surface, the pawl moves away from the ratchet and the return spring is further compressed; when the ratchet rotates in the opposite direction, the ratchet drives the pawl to rotate.

[0014] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, wherein: a plurality of connecting blocks are arranged on the upper side of the two seeding transmission sleeves at the leftmost and rightmost ends, and an active bevel gear fitted on the seeding tube is fixedly connected to the upper side of the connecting blocks; each seeder of each seeding unit shares a seeding shaft, and the active bevel gear and the seeding shaft are connected in a driving connection; when the lifting screw descends, the rotating screw sleeve drives the seeding transmission sleeve to rotate via the ratchet; when the lifting screw rises, the seeding transmission sleeve remains stationary.

[0015] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, wherein: a plurality of lifting motors corresponding one-to-one with the lifting screw are fixedly connected to the upper side of the connecting bracket, and an output shaft is connected to the lifting motor, and the output shaft is connected to the lifting screw.

[0016] The small trolley is equipped with a controller for controlling the operation of the lifting motor. The controller includes a switch for controlling the motor's movement and rotation direction. When the seeding tube moves into the elongated seed furrow, pressing the switch activates the lifting motor, causing the lifting screw to rotate. The screw drives the lifting plate to move vertically; in this mode, the lifting plate moves downwards. When the lifting plate reaches the set lowest position, the lifting motor automatically stops. Pressing the button again reverses the motor's operation, causing the lifting plate to move upwards. When it reaches the reset position, the lifting motor stops. This method uses a switch as the hardware trigger to start the lifting motor, and controls the motor's movement through a combination of a button switch and a program. This is existing technology, and the controller and button switch are not shown in this application.

[0017] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, it further includes two sets of power transmission components respectively arranged at the left and right ends of the connecting bracket. The power transmission component includes a transmission shaft rotatably connected to the support bracket. A lower transmission wheel and a rotating bevel gear cooperating with the driving bevel gear are connected on the transmission shaft. A driven wheel is connected to a seeding shaft above the driving bevel gear. The lower transmission wheel is connected to the driven wheel via a first transmission belt.

[0018] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, wherein: two lifting screws are provided; a first upper support seat and a second upper support seat are fixedly connected to the upper side of the support bracket and spaced apart in the left and right directions; a first rotating shaft and a second rotating shaft are respectively rotatably connected to the first upper support seat and the second upper support seat; a first transmission bevel gear is connected to the seed metering shaft directly above the transmission bevel gear; a first transmission wheel and a first driven bevel gear meshing with the first transmission bevel gear are connected to the first rotating shaft; a second driven bevel gear is connected to the seed metering shaft between the two lifting screws; a second transmission bevel gear and a second transmission wheel are connected to the second rotating shaft; and the first transmission wheel is connected to the second transmission belt and the second transmission wheel.

[0019] As a preferred embodiment of the wheat experimental plot sowing device of the present invention, wherein: a connecting part is fixed on the outer periphery of the seed discharge pipe below the seed guide sleeve, and two lifting plates are respectively fitted onto the seed discharge pipes on the upper and lower sides of the connecting part, and the two lifting plates are fixedly connected. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0021] Figure 1 This is the main view of the present invention. Figure 1 .

[0022] Figure 2 The three-dimensional structure of the present invention Figure 1 .

[0023] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0024] Figure 4 The three-dimensional structure of the present invention Figure 2 .

[0025] Figure 5 for Figure 4 Enlarged view of the structure at point B in the middle.

[0026] Figure 6 The three-dimensional structure of the present invention Figure 3 .

[0027] Figure 7 for Figure 6 Enlarged view of the structure at point C.

[0028] Figure 8 A perspective view of the structure connecting the seed metering unit and the seed metering tube drive (with a dustproof end cap hidden).

[0029] Figure 9 for Figure 8 Enlarged view of the structure at point D.

[0030] Figure 10 This is a schematic diagram of a partial structure connecting the seed metering unit and the seed metering tube drive (with a dustproof end cap hidden).

[0031] Figure 11 The three-dimensional structure of the present invention Figure 3 .

[0032] Figure 12 for Figure 11 Enlarged view of the structure at point E in the middle.

[0033] Figure 13 The three-dimensional structure of the present invention Figure 4 .

[0034] Figure 14 for Figure 13 Enlarged view of the structure at point F in the middle.

[0035] Figure 15 The three-dimensional structure of the present invention Figure 5 .

[0036] Figure 16 for Figure 15 Enlarged view of the structure at point G in the middle.

[0037] Figure 17 The three-dimensional structure of the present invention Figure 5 .

[0038] Figure 18 for Figure 17 Enlarged view of the structure at point H in the middle.

[0039] Figure 19 This is the main view of the present invention. Figure 2 .

[0040] Figure 20 This is a top-down partial structural diagram of a field plot awaiting sowing in an experimental planting area.

[0041] Figure 21 This is a side view of a partial structure of a field plot awaiting sowing in an experimental planting area.

[0042] The components include: 100 connecting assembly, 101 connecting bracket, 102 support plate, 103 support bracket, 200 sowing assembly, 201 lifting motor, 202 lifting screw, 203 lifting plate, 204 seed metering unit, 204a seed guide sleeve, 204b seed metering tube, 204b-1 connecting part, 204c rotating screw sleeve, 204c-1 spiral groove, 204c-2 rotating sleeve, 204c-3 fixing part, 204c-4 fixing plate, 204d seed metering device, 204e seed dropping tube, 204f transmission column, 204g connecting block, 204h seed metering transmission sleeve, 204i anti-egress ring, 204j ratchet, 204j-1 transmission tooth, and 204k return spring. 204l ratchet, 204l-1 transmission surface, 204m dustproof end cap, 204n seed metering transmission ring, 205 lower transmission wheel, 206 transmission shaft, 207 first transmission belt, 208 driven wheel, 209 seed metering shaft, 210 rotating bevel gear, 211 driving bevel gear, 212 second upper support seat, 213 first upper support seat, 214 second rotating bevel gear, 215 second driven bevel gear, 216 first driven bevel gear, 217 first rotating bevel gear, 218 second transmission belt, 219 second transmission wheel, 220 second rotating shaft, 221 first rotating shaft, 222 first transmission wheel, 223 lower support seat, 300 long strip seed furrow, 400 small ridge. Detailed Implementation

[0043] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0045] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0046] Example 1

[0047] Reference Figures 1-3 , Figure 20 and Figure 21 This is the first embodiment of the present invention. This embodiment provides a sowing device suitable for wheat experimental plots. When using it for sowing, there is no need to lift and press down the sowing frame. Only one person is needed to complete the sowing operation, reducing labor intensity.

[0048] A seeding device suitable for wheat experimental plots includes a connecting assembly 100 and a seeding assembly 200. The connecting assembly 100 includes a connecting bracket 101 with an opening in the front-to-back direction. A support bracket 103 is fixedly connected to the opening of the connecting bracket 101, and a support plate 102 is fixedly connected to the lower side of the support bracket 103. The seeding assembly 200 includes m vertically arranged lifting screws 202 rotatably connected between the upper end of the support bracket 103 and the lower end of the connecting bracket 101. Lifting plates 203 are threadedly connected to the lifting screws 202 and slidably connected to a plurality of seeding tubes 204b. The connecting bracket 101 is provided with m+n sets of seeding units 204. Each seeding unit 204 includes a plurality of seeders 204d on the upper side of the support bracket 103 and fixedly connected to the lower end of the connecting bracket 101, where m is not less than... The number m is an integer greater than or equal to 2, and n is an integer not less than 1. In this embodiment, m is preferably 2. A seed guide sleeve 204a is fixedly connected to the lower side of the seed metering device 204d, extending downward beyond the support bracket 103. A seed metering tube 204b that can be raised and lowered is connected to the connecting bracket 101. A connecting part 204b-1 is fixedly attached to the outer periphery of the seed metering tube 204b below the seed guide sleeve 204a. There are two lifting plates 203. The two lifting plates 203 are respectively fitted onto the seed metering tubes 204b on the upper and lower sides of the connecting part 204b-1. The two lifting plates 203 are fixedly connected. The upper part of the seed metering tube 204b is slidably connected to the seed guide sleeve 204a. The lifting plates 203 are connected to several seed metering tubes 204b. When the lifting plates 203 move downward, the seed metering device 204d moves. When the lifting plates 203 move upward, the seed metering device 204d does not move.

[0049] In implementing this invention, the invention is fixed to the frame of a small cart via a connecting bracket 101. A small seed box is fixed to the frame of the small cart, and a disc seed metering device 204d is fixed to the lower side of the small seed box. Each seed outlet of the disc seed metering device 204d is fixedly connected to a connecting pipe at its lower end. Several seed drop pipes 204e, corresponding one-to-one with the seed metering device 204d, are fixedly connected to the upper side of the connecting bracket 101. The lower end of the connecting pipe is connected to the corresponding seed drop pipe 204e (the small seed box and the disc seed metering device 204d are prior art, their connection method is also prior art, and the connection between the pipes is also prior art, not an improvement point of this application); in the initial state, the seed metering pipe 204b is in a high position, that is, the bottom of the seed metering pipe 204b is not lower than the top of the small furrow 400; the small cart is pushed to move within the row spacing between two adjacent seed furrow units (the direction of movement is as follows). Figure 21(As indicated by the arrow) When the seed metering tube 204b moves into the elongated seed trench 300, the lifting screw 202 rotates, causing the lifting plate 203 to rise and fall. Adjusting the rotation direction of the lifting screw 202 causes the lifting plate 203 to move downwards. The upper lifting plate 203, via the connecting part 204b-1, causes the seed metering tube 204b to move downwards. The seed metering tube 204b then drives the seed metering device 204d to operate, dispensing seeds that fall sequentially through the corresponding seed guide sleeve 204a and the seed metering tube 204b into the elongated seed trench 300. When the rotation angle of the lifting screw 202 reaches the designed number of rotations, the seed metering tube 204b moves to the set lowest position, and the lifting screw 202 stops rotating, completing one elongated seed trench 300. The sowing operation of 00 involves rotating the lifting screw 202 in the opposite direction. The lower lifting plate 203, via the connecting part 204b-1, moves the seed metering sleeve upward, simultaneously pushing the small cart forward. When the seed metering sleeve returns to its original position, the lifting screw 202 stops rotating. When passing the small ridge 400, the seed metering sleeve rests above the ridge 400, preventing contact between the seed metering sleeve and the soil and preventing the seed metering tube 204b from accumulating mud and becoming blocked, thus preventing normal seed dispensing. When the seed metering tube 204b moves to the next long strip seed furrow 300, the above sowing steps are repeated to complete the sowing operation at the next long strip seed furrow 300. By continuously repeating the above actions, the sowing operation of the same crop in the entire plot can be completed. The operation is simple, effortless, and reduces labor intensity.

[0050] Specifically, several lifting motors 201 corresponding to the lifting screws 202 are fixedly connected to the upper side of the connecting bracket 101. The lifting motors 201 are connected to an output shaft, which is connected to the lifting screws 202.

[0051] The specific implementation of the small trolley is equipped with a controller for controlling the operation of the lifting motor 201. The controller is installed in a convenient location for operation and has two push-button switches for controlling the operation and rotation direction of the lifting motor 201. The controller and the lifting motor 201 are electrically connected. A displacement sensor is fixedly installed on the connecting bracket 101 above the lifting plate 203. The displacement sensor is used to detect the lifting distance of the lifting plate 203. The displacement sensor and the controller are electrically connected. The displacement sensor transmits the detected distance signal of the lifting plate 203 descending or rising to the controller. The controller receives the distance signal and controls the start and stop of the lifting motor 201 according to the distance signal. (The electrical connection between the displacement sensor and the controller is prior art and is not shown, but it does not affect the scope of this technical field.) (Understanding the technical solution); When the small trolley moves the seeding pipe 204b into the long strip seed furrow 300, stop pushing the small trolley, press the corresponding button switch, the lifting motor is activated, the lifting screw 202 rotates, the lifting screw 202 drives the lifting plate 203 to move in the height direction. In this mode, the lifting plate 203 moves downward, and the displacement sensor detects the descent distance of the lifting plate 203 in real time. When the displacement sensor detects that the lifting plate 203 has moved to the set lowest position, the lifting motor 201 automatically stops. Release one button switch and press the other button switch at the same time, the lifting motor 201 moves in the reverse direction, and the lifting plate 203 moves upward. When the displacement sensor detects that the lifting plate 203 has moved to the initial height, the lifting motor 201 stops. In this application, the button switch is used as the hardware trigger for the lifting motor 201 to start moving and turn. The forward and reverse rotation of the lifting motor 201 is adjusted by the two preset button switches, which is the prior art. The controller and button switches are not shown in this application.

[0052] Example 2

[0053] Reference Figures 4 to 14 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment and can further realize the raising and lowering of the seed metering tube 204b, while realizing the controllable seed metering operation of the seed metering device 204d.

[0054] Specifically, at least one rotating screw sleeve 204c is rotatably connected between the lower end of the support plate 102 and the connecting bracket 101. The rotating screw sleeve 204c has a spiral groove 204c-1 on its outer periphery. The seeding tube 204b is connected to a transmission column 204f that is inserted into the spiral groove 204c-1 and can slide along the spiral groove 204c-1.

[0055] When the lifting plate 203 moves down, the lifting plate 203 drives the seed metering pipe 204b to move down. The seed metering pipe 204b drives the rotating screw sleeve 204c to rotate via the transmission column 204f. The rotating screw sleeve 204c drives the seed metering shaft 209 to rotate, and the seed metering device 204d is activated to meter the seeds.

[0056] Specifically, it also includes several seed metering transmission components corresponding one-to-one with the rotating screw sleeve 204c. Each seed metering transmission component includes a seed metering transmission sleeve 204h connected to the support plate 102. The seed metering transmission sleeve 204h has at least two sliding holes arranged inside. A pawl 204l is slidably connected to the seed metering transmission sleeve 204h through the sliding holes. A ratchet 204j is connected to the upper part of the rotating screw sleeve 204c. Several transmission teeth 204j-1 are arranged on the outer circumference of the ratchet 204j. The pawl 204l can be inserted into the gap between any two transmission teeth 204j-1 on the outer circumference of the ratchet 204j. A seed metering transmission ring 204n, rotatably connected to the support plate 102, is fixedly connected to the outer side of the seed metering transmission sleeve 204h. The pawl 204l is located away from the ratchet. One end of wheel 204j is connected to a return spring 204k. The end of return spring 204k away from pawl 204l is connected to the inner wall of seeding transmission ring 204n. Seeding transmission ring 204n and seeding shaft 209 are connected in a transmission connection. The inner end of pawl 204l (the inner end of pawl 204l is the end of pawl 204l facing the direction of ratchet 204j) has an inclined transmission surface 204l-1 that can fit against the outside of transmission tooth 204j-1. When ratchet 204j rotates against transmission surface 204l-1 and pushes pawl 204l to move in the direction of sliding hole, return spring 204k is further compressed. When ratchet 204j rotates in the opposite direction, ratchet 204j drives pawl 204l to rotate.

[0057] In the initial state (with the pawl 204l within the gap between two adjacent transmission teeth 204j-1), the transmission surface 204l-1 is completely outside the sliding hole, and the return spring 204k is in a slightly compressed state. When the seed metering tube 204b is pushed to the corresponding position of the long strip seed furrow 300 by the small trolley, the seed metering tube 204b moves downward, driving the rotating screw sleeve 204c to rotate. The rotating screw sleeve 204c drives the ratchet 204j to rotate. When the ratchet 204j rotates, its transmission teeth 204j-1 abut against the pawl 204l on the side where the innermost end of the transmission surface 204l-1 is located. The ratchet 204j drives the seed metering transmission sleeve 204h to rotate via the pawl 204l. The seed metering transmission sleeve 204h drives the seed metering transmission ring 204n to rotate, driving the seed metering shaft 209 to rotate. The seed meterer 204d then performs seed metering, thus completing the seed metering process. The seed metering of the long strip seed furrow 300 is then complete. Then, the seed metering tube 204b moves upward, simultaneously pushing the small trolley forward. The seed metering tube 204b drives the rotating sleeve 204c to rotate, and the rotating sleeve 204c drives the ratchet 204j to rotate. At this time, the transmission surface 204l-1 is in contact with the transmission teeth 204j-1. The ratchet 204j rotates from the outer end of the transmission surface 204l-1 to the innermost end of the transmission surface 204l-1 (here, the inner end and the outer end refer to the axial direction of the pawl 204l). The ratchet 204j squeezes the pawl 204l through the transmission surface 204l-1, and the pawl 204l moves in the direction of the sliding hole. The return spring 204k is compressed. When the seed metering tube 204b moves upward to the set height, the pawl 204l is reset under the action of the return spring 204k. The inner end of the pawl 204l is inserted into the gap between two adjacent transmission teeth 204j-1, avoiding seed metering during the forward movement of the small trolley.

[0058] Specifically, several connecting blocks 204g are arranged on the upper side of the two seeding transmission sleeves 204h at the leftmost and rightmost ends. The upper side of the connecting blocks 204g is fixedly connected to the active bevel gear 211 fitted on the seeding tube 204b. Each seeder 204d of each seeding unit 204 shares a seeding shaft 209. The active bevel gear 211 and the seeding shaft 209 are connected in a transmission manner. When the lifting screw 202 descends, the rotating screw sleeve 204c drives the seeding transmission sleeve 204h to rotate via the ratchet 204j. When the lifting screw 202 rises, the seeding transmission sleeve 204h remains stationary.

[0059] It also includes two sets of power transmission components respectively set at the left and right ends of the connecting bracket 101. The power transmission components include a transmission shaft 206 rotatably connected to the support bracket 103. A lower transmission wheel 205 and a rotating bevel gear 210 cooperating with the driving bevel gear 211 are connected on the transmission shaft 206. A driven wheel 208 is connected to a seeding shaft 209 above the driving bevel gear 211. The lower transmission wheel 205 is connected to the driven wheel 208 via a first transmission belt 207.

[0060] When the two seeding transmission sleeves 204h at the leftmost and rightmost ends rotate, the seeding transmission sleeves 204h drive the active bevel gear 211 to rotate via the connecting block 204g. The active bevel gear 211 drives the rotating bevel gear 210 to grab the computer. The rotating bevel gear 210 drives the transmission shaft 206 to rotate. The transmission shaft 206 drives the lower transmission wheel 205 to rotate. The lower transmission wheel 205 drives the corresponding driven wheel 208 to rotate via the first transmission belt 207. The two driven wheels 208 drive the two seeding shafts 209 at the leftmost and rightmost ends to rotate respectively, realizing the seeding operation of the two seeding units 204 at the left and right ends.

[0061] Specifically, there are two lifting screws 202. The upper side of the support bracket 103 is fixedly connected to a first upper support seat 213 and a second upper support seat 212 that are spaced apart in the left and right directions. The first upper support seat 213 and the second upper support seat 212 are respectively rotatably connected to a first rotating shaft 221 and a second rotating shaft 220. The first rotating shaft 221 is connected to a first transmission wheel 222 and a first driven bevel gear 216. The seeding shaft 209 at the leftmost end is connected to a first rotating bevel gear 217 that meshes with the first driven bevel gear 216. The seeding shaft 209 between the two lifting screws 202 is connected to a second driven bevel gear 215. The second rotating shaft 220 is connected to a second rotating bevel gear 214 and a second transmission wheel 219. The first transmission wheel 222 is connected to the second transmission belt 218 and the second transmission wheel 219.

[0062] When the leftmost seeding shaft 209 rotates, it drives the first rotating bevel gear 217 to rotate. The first rotating bevel gear 217 drives the first rotating shaft 221 to rotate via the first driven bevel gear 216. The first rotating shaft 221 drives the first transmission wheel 222 to rotate. The first transmission wheel 222 drives the second transmission wheel 219 to rotate via the second transmission belt 218. The second transmission wheel 219 drives the second rotating shaft 220 to rotate. The second rotating shaft 220 drives the second rotating bevel gear 214 to rotate. The second rotating bevel gear 214 drives the middle seeding shaft 209 to rotate via the second driven bevel gear 215, thus realizing the synchronous seeding operation of the three seeding units 204. When the leftmost seeding shaft 209 does not rotate, the middle seeding shaft 209 will also not rotate, further realizing the synchronous operation of the three seeding units 204.

[0063] Example 3

[0064] Reference Figure 5 , Figures 15-19 This embodiment is the third embodiment of the present invention. This embodiment can further improve the reliability of the rotation of the rotating screw sleeve 204c, and further realize the synchronous movement of the rotating screw sleeve 204c and the ratchet 204j.

[0065] For details, please refer to Figure 15 and Figure 16 Several fixing parts 204c-3 are arranged on the outer periphery of the rotating screw sleeve 204c below the spiral groove 204c-1. A rotating sleeve 204c-2 is fixed on the outer periphery of the fixing parts 204c-3. The rotating sleeve 204c-2 is rotatably connected to the lower end of the connecting bracket 101, improving the reliability of the rotation of the rotating screw sleeve 204c; see reference. Figure 5 , Figure 17 and Figure 18 Dustproof end caps 204m are fixedly connected to the upper and lower ends of the ratchet 204j, and the dustproof end caps 204m are rotatably connected inside the seed metering transmission sleeve 204h. Several anti-slip rings 204i, corresponding one-to-one with the seed metering transmission rings 204n and covering the corresponding seed metering transmission rings 204n, are arranged on the upper and lower sides of the support plate 102. The upper and lower anti-slip rings 204i are used to prevent the seed metering transmission rings 204n from moving in the height direction. (Reference) Figure 17 and Figure 18 A fixing plate 204c-4 is fixedly connected to the outer periphery of the rotating sleeve 204c on the lower side of the support plate 102. The two ends of the fixing plate 204c-4 are offset from the spiral groove 204c-1. Several fixing holes are arranged on the fixing plate 204c-4. Fastening screws are screwed into the fixing holes and the dustproof end cover 204m. The fixing plate 204c-4 and the dustproof end cover 204m are fixedly connected together, and the fixing plate 204c-4 and the ratchet 204j are fixed together, realizing the fixed connection between the rotating sleeve 204c and the ratchet 204j, thereby further realizing the synchronous operation of the rotating sleeve 204c and the ratchet 204j.

[0066] Reference Figure 19 In actual implementation, a lower support base 223 can be fixedly connected to the upper side of the support plate 102, and the transmission shaft 206 can be rotatably connected to the support bracket 103 and the lower support base 223 to improve the reliability of the rotation of the transmission shaft 206.

[0067] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the present invention.

Claims

1. A seeding device suitable for wheat experimental plots, characterized in that: include, A connecting assembly includes a connecting bracket with an opening in the front-to-back direction, a support bracket fixedly connected inside the opening of the connecting bracket, and a support plate fixedly connected to the lower side of the support bracket; The sowing assembly includes m vertically arranged lifting screws rotatably connected between the upper end of a support bracket and the lower end of a connecting bracket. Each lifting screw is threaded with a lifting plate. The connecting bracket has m+n seed metering units. Each seed metering unit includes several seed metering devices fixedly connected to the lower end of the connecting bracket on the upper side of the support bracket, where m is an integer not less than 2. A seed guide sleeve extending downwards from the support bracket is fixedly connected to the lower side of each seed metering device. A seed metering tube capable of being raised and lowered is connected to the connecting bracket. The upper part of the seed metering tube is slidably connected to the seed guide sleeve. The lifting plate is connected to several seed metering tubes. When the lifting plate moves downwards, the seed metering device moves; when the lifting plate moves upwards, the seed metering device does not move. At least one rotating screw sleeve is rotatably connected between the support plate and the lower end of the connecting bracket. The rotating screw sleeve has a spiral groove on its outer circumference. A transmission column inserted into the spiral groove and capable of sliding along the spiral groove is connected to the outer circumference of the seed metering tube. A number of seed metering transmission components corresponding one-to-one with rotating screw sleeves are provided. Each seed metering transmission component includes a seed metering transmission sleeve connected to a support plate. The seed metering transmission sleeve has at least two sliding holes arranged inside. A pawl is slidably connected to the seed metering transmission sleeve through the sliding holes. A ratchet is connected to the upper part of the rotating screw sleeve. A number of transmission teeth are arranged on the outer circumference of the ratchet. The pawl can be inserted into the gap between any two transmission teeth on the outer circumference of the ratchet. A seed metering transmission ring rotatably connected to the outer side of the seed metering transmission sleeve is fixedly connected to the outer side of the seed metering transmission sleeve. A return spring is connected to the end of the pawl away from the ratchet. The end of the return spring away from the pawl is connected to the inner wall of the seed metering transmission ring.

2. The wheat experimental plot sowing device as described in claim 1, characterized in that: The inner end of the pawl has an inclined transmission surface that can fit against the outer side of the transmission teeth. When the ratchet rotates against the transmission surface, the pawl moves away from the ratchet and the return spring is further compressed. When the ratchet rotates in the opposite direction, the ratchet drives the pawl to rotate.

3. The wheat experimental plot sowing device as described in claim 1, characterized in that: Several connecting blocks are arranged on the upper side of the two seeding transmission sleeves at the leftmost and rightmost ends. The upper side of the connecting blocks is fixedly connected to the active bevel gear that is fitted on the seeding tube. Each seeder of each seeding unit shares a seeding shaft. The active bevel gear and the seeding shaft are connected in a transmission manner. When the lifting screw descends, the rotating screw sleeve drives the seeding transmission sleeve to rotate via the ratchet. When the lifting screw rises, the seeding transmission sleeve remains stationary.

4. The suitable wheat experimental plot sowing device as described in any one of claims 1 to 3, characterized in that: Several lifting motors, each corresponding to a lifting lead screw, are fixedly connected to the upper side of the connecting bracket. Each lifting motor is connected to an output shaft, which is connected to the lifting lead screw.

5. The wheat experimental plot sowing device as described in claim 3, characterized in that: It also includes two sets of power transmission components respectively set at the left and right ends of the connecting bracket. The power transmission components include a transmission shaft rotatably connected to the support bracket. A rotating bevel gear that cooperates with a lower transmission wheel and a driving bevel gear is connected to the transmission shaft. A driven wheel is connected to a seeding shaft above the driving bevel gear. The lower transmission wheel is connected to the driven wheel via a first transmission belt.

6. The wheat experimental plot sowing device as described in any one of claims 1 to 3, characterized in that: Two lifting screws are provided. A first upper support seat and a second upper support seat are fixedly connected to the upper side of the support bracket and spaced apart in the left and right direction. A first rotating shaft and a second rotating shaft are rotatably connected to the first upper support seat and the second upper support seat, respectively. A first transmission bevel gear is connected to the seeding shaft directly above the transmission bevel gear. A first transmission wheel and a first driven bevel gear meshing with the first transmission bevel gear are connected to the first rotating shaft. A second driven bevel gear is connected to the seeding shaft between the two lifting screws. A second transmission bevel gear and a second transmission wheel are connected to the second rotating shaft. The first transmission wheel is connected to the second transmission wheel via a second transmission belt.

7. The wheat experimental plot sowing device as described in any one of claims 1 to 3, characterized in that: A connecting part is fixed to the outer periphery of the seed discharge tube below the seed guide sleeve. There are two lifting plates, which are respectively fitted onto the seed discharge tubes on the upper and lower sides of the connecting part, and the two lifting plates are fixedly connected.

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