Self-propelled seeder suitable for trench crops

Abstract

The invention discloses a self-propelled seeding machine suitable for trench crops. The self-propelled seeding machine comprises a moving vehicle body and a transmission frame body assembly connected with the moving vehicle body in the advancing direction, a meshing driving assembly is arranged at the bottom of the movable vehicle body; an adjustable discharging disc assembly is arranged on the upper portion, close to the front end, of the transmission frame body assembly. The pointed cone seeding head assembly is arranged at the lower part, close to the front end, of the transmission frame body assembly, and the bottom of the adjustable discharging disc assembly is communicated with the pointed cone seeding head assembly; the pointed cone seeding head assembly comprises an extension frame assembly and a covering film covering the extension frame assembly. By improving the seeding technology and the mechanical structure of the seeding machine, namely, under the action of the meshing driving assembly, the walking state of the vehicle body is matched with the running state of the transmission frame body assembly, so that the seeding speed can be adaptively adjusted along with the walking speed of the vehicle body when seeding is carried out in mountainous regions and between furrows; and the conditions that the seeding spacing of the seeds is not uniform, and each hole contains various seeds or few seeds are effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural production sowing, in particular to a self-propelled seeder suitable for trench crops. Background Art

[0002] The cultivation technology of interplanting corn after tobacco is proposed by the team of Academician Zhu Youyong of Yunnan Agricultural University based on a thorough investigation. Relying on the advantages of 6 million mu of flue-cured tobacco land in Yunnan Province, corn (grain corn, silage corn and fresh corn) is interplanted with tobacco in suitable tobacco areas to achieve "coordinated development of tobacco and grain". Interplanting corn after tobacco means interplanting corn in mid-to-late July (when the tobacco leaves are cured to the middle leaves or the tobacco leaves in the lower two sheds are harvested) and harvesting in mid-November;

[0003] Regarding the current cultivation technology of corn intercropping after tobacco, firstly, manual sowing is generally adopted, which is time-consuming, labor-intensive and has low labor efficiency; secondly, machines are partially used to complete the sowing, but considering the walking between furrows, the walking speed of the machine body is sometimes fast and sometimes slow. When the sowing frequency is constant, the sowing spacing is easy to change under the condition of fast or slow speed. At a certain spacing, the seed sowing is unevenly distributed, and it is also easy to have a situation of multiple seeds and few seeds within the spacing. For this reason, it is necessary to design a self-propelled seeder, that is, when the tobacco leaves are harvested to the middle leaves (40-50cm above the root of the tobacco), mechanical spot sowing of corn and soybean seeds is used. Summary of the invention

[0004] The object of the present invention is to provide a self-propelled seeder suitable for trench crops, through improvements in the sowing technology and the mechanical structure of the seeder, that is, under the action of the meshing drive assembly, the walking state of the vehicle body matches the operating state of the transmission frame assembly, so that when dealing with mountainous areas and trench sowing, the sowing speed can be adaptively adjusted according to the walking speed of the vehicle body, effectively avoiding uneven seed sowing spacing and multiple or few seeds in each hole.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a self-propelled seeder suitable for trench crops, comprising: a mobile body, and a transmission frame assembly connected to the forward direction of the mobile body; a meshing drive assembly is arranged at the bottom of the mobile body, which is used to drive the switching operation of the mobile body and the transmission frame assembly respectively; an adjustable discharge tray assembly is arranged at the upper part of the transmission frame assembly near the front end, which is used to select the discharge of the number of crop particles; and a pointed cone seeding head assembly is arranged at the lower part of the transmission frame assembly near the front end, and the bottom of the adjustable discharge tray assembly is connected to the pointed cone seeding head assembly; the pointed cone seeding head assembly includes an expansion frame assembly, and a coating film covered with the expansion frame assembly, when the transmission frame assembly is running, the pointed cone seeding head assembly can be used to insert the pointed cone seeding head assembly into the soil, and the expansion frame assembly drives the coating film to expand and open to release the crop particles, so as to realize self-propelled seeding.

[0006] Preferably, the transmission frame assembly includes a connecting rod transmission frame and a gear rack transmission mechanism, the gear rack transmission mechanism acts between the connecting rod transmission frame and the meshing drive assembly, and is used to drive the connecting rod transmission frame to operate; the connecting rod transmission frame is provided with two groups and is distributed on both sides of the mobile vehicle body, each group of connecting rod transmission frames includes a support rail, and a support block slidably installed inside the support rail, and the support rod fixed on the support block, the upper and lower parts of which are respectively rotatably connected to the first connecting rod, and the two first connecting rods are rotatably connected to the second connecting rod at one end away from the support rod, and the adjustable discharge tray assembly is installed between the second connecting rods where the two groups of connecting rod transmission frames are located; it also includes a first rotating shaft arranged at the front end of the support rail, and the third connecting rod fixed at the inner end of the first rotating shaft is rotatably connected to the middle part of the first connecting rod placed in the lower position through a first pin shaft.

[0007] Preferably, the rack and pinion transmission mechanism is provided with two groups and respectively drives the movement of two groups of connecting rod transmission frames, each group of rack and pinion transmission mechanism includes a mounting rod fixed in the middle of the support rail, and a transmission frame fixed on the mounting rod; it also includes a transmission rail, which is slidably installed inside the transmission frame, one end of which is connected to the meshing drive assembly, and the other end of which is fixed with a rack body through a connecting bar, and when the meshing drive assembly is running, it is used to drive the transmission rail to move inside the transmission frame and realize horizontal movement of the rack body; and a gear body fixed in the middle of the first rotating shaft, and the gear body is meshed with the rack body.

[0008] Preferably, the mobile vehicle body includes a frame, and a mounting shaft rotatably connected to the opposite side of the frame, and both ends of the mounting shaft respectively pass through through holes opened in the side wall of the frame and are fixed with a first wheel body; it also includes a second wheel body respectively arranged on the opposite sides of the middle of the two branch rails.

[0009] Preferably, the meshing drive assembly is provided with two groups and distributed on opposite surfaces of the frame; each group of meshing drive assemblies includes a drive motor arranged on the inner wall of the frame, and an incomplete gear fixed to the output end of the drive motor; a second transmission tooth is fixed to one end of the mounting shaft; it also includes a second rotating shaft rotatably connected to the inner wall of the frame, and a first transmission tooth fixed in the middle of the second rotating shaft, which is an incomplete gear staggeredly meshed with the second transmission tooth, and the radius of the two is half of the radius of the incomplete gear; a mounting plate and a shaft body arranged on the mounting plate are also fixed to the end of the second rotating shaft away from the frame, and a transmission bar rotatably connected to the shaft body, and its end away from the shaft body is hinged to the end of the transmission rail away from the rack body through a hinge.

[0010] Preferably, the adjustable discharge tray assembly is provided with two groups and is symmetrically distributed; each group of adjustable discharge tray assemblies includes a shell, the shell is composed of tray side frames in a fixed state on both sides, and a tray peripheral frame in a movable state in the middle; and an inner ring and an outer ring fixed between the two tray side frames and distributed inside and outside, and the inner ring and the outer ring are both annular structures with an opening at the lower end; it also includes a lever control material assembly arranged at the opening of the inner ring and the outer ring, and the lever control material assembly, the inner ring, and the tray side frame together constitute a material storage cavity, and the lever control material assembly is used to control the opening and closing of the material storage cavity and realize the quantity control of the discharge; and a feed pipe and a connecting pipe distributed on the side wall and the bottom wall of the tray side frame, and the feed pipe is connected with the material storage cavity, and the connecting pipe is connected with the pointed cone seeding head assembly; a material guide plate is also arranged at the opening of the outer ring, and the material guide plate is arranged on the side of the outer ring close to the tray peripheral frame.

[0011] Preferably, the lever material control assembly is composed of a lever assembly and a trigger assembly for driving the lever assembly to operate, wherein the trigger assembly is annularly distributed on the side wall of the disk peripheral frame; the lever assembly includes a seat body arranged on the side wall of the disk side frame and placed inside the inner ring, and a lever body rotatably connected to the side wall of the seat body, which is composed of a limit end and a trigger end, wherein the trigger end where the lever body is located passes through the openings at the lower ends of the inner ring and the outer ring in sequence and extends to the forward side of the trigger assembly; and a limit piece arranged on the seat body, wherein the limit piece contacts the limit end where the lever body is located; It also includes a mounting block arranged on the seat body, and a reset spring connected to the mounting block and the middle part of the lever body is used for resetting the lever body; each group of the trigger components includes a limit groove provided on the side wall of the disk frame, a limit block provided in the limit groove, a top plate fixed on the side wall of the limit groove contacts the trigger end of the lever body and forms an Ω shape; and a threaded hole provided on the side wall of the disk frame and connected to the limit groove; it also includes a screw arranged inside the threaded hole, and one end of the screw extends into the limit groove and is rotatably connected to the limit block, and the other end of the screw faces outward and is fixed with a handle.

[0012] Preferably, the extension frame assembly includes a discharge pipe, which is fixed at the bottom of the two connecting pipes and connected thereto; and a first ring sleeve and a second ring sleeve which are arranged at the lower part of the discharge pipe and distributed up and down, and the first ring sleeve is slidably installed with the discharge pipe, and the second ring sleeve is fixed with the side wall near the bottom end of the discharge pipe; and a mounting piece and a V-shaped frame which are respectively annularly arranged on the first ring sleeve and the second ring sleeve, and the coating is installed on the outer wall of the V-shaped frame; and also includes a connecting rod hinged on the mounting piece, and the end of the connecting rod away from the mounting piece is hinged to the upper end of the V-shaped frame.

[0013] Preferably, a first pressure sensor and a second pressure sensor are respectively provided at both ends of each of the support blocks, and the first pressure sensor and the second pressure sensor are respectively used to control the operation of the pointed cone seeding head assembly and the adjustable discharge tray assembly.

[0014] Preferably, a liquid fertilizer spreading device is provided at the end of the moving body in the forward direction, and the liquid fertilizer spreading device includes a box body arranged on the top of the frame, and a plurality of liquid inlets arranged on the top of the box body; it also includes a spray head assembly arranged on the side wall of the box body; the spray head assembly includes a piston sleeve fixed to the lower wall of the box body, and a through pipe arranged at the side input port of the piston sleeve is connected to the lower part of the box body, and a spray head arranged at the bottom output port is used for spraying liquid; and a first one-way valve and a second one-way valve are respectively arranged at the input port and the output port of the piston sleeve; it also includes a piston plate arranged inside the piston sleeve, and a piston rod fixed to the side wall of the piston plate, and its end away from the piston plate is fixedly connected to the transmission frame where the two sets of gear rack transmission mechanisms are located through a connecting frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Under the action of the meshing drive assembly, the walking state of the vehicle body matches the running state of the transmission frame assembly. When walking fast, the sowing speed also increases, and when walking slowly, the sowing speed also decreases. Therefore, when sowing in mountainous areas or between ditches, the sowing speed can be adjusted adaptively with the walking speed of the vehicle body, effectively avoiding the situation of uneven seed sowing spacing and multiple or few seeds in each hole;

[0017] 2. As another embodiment of the present invention, an adjustable discharge tray assembly and a pointed cone seeding head assembly are respectively arranged at the upper and lower parts of the front end of the transmission frame assembly, and the two are connected. Under the action of the adjustable discharge tray assembly, selective discharge of crop particles can be achieved.

[0018] 3. As the insertion type sowing of the present invention, it is known that the transmission frame assembly not only serves as the mounting structure of the adjustable discharge tray assembly and the pointed cone sowing head assembly, but also serves as the driving structure of the two. At the same time, the transmission frame assembly and the mobile body can realize reciprocating operation under the action of the meshing driving assembly. Therefore, when the mobile body is running, the adjustable discharge tray assembly and the pointed cone sowing head assembly are in a standby state, and when the transmission frame assembly is running, the two are in a sowing working state, thereby embodying the self-propelled sowing of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure from a first viewing angle of the present invention;

[0020] Figure 2 is a schematic diagram of a second viewing angle stereoscopic structure of the present invention;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure from a third viewing angle of the present invention;

[0022] Figure 4 It is a side view structural schematic diagram of the present invention;

[0023] Figure 5 It is a front structural schematic diagram of the present invention;

[0024] Figure 6 It is a schematic diagram of the disassembled structure of the adjustable discharging tray assembly and the pointed cone seeding head assembly;

[0025] Figure 7 It is a schematic diagram of the partially disassembled structure of the adjustable discharging tray assembly and the pointed cone seeding head assembly;

[0026] Figure 8 for Figure 7 Another perspective structural diagram of;

[0027] Fig. 9 for Figure 7 A side view structural schematic diagram of;

[0028] Fig.10 It is a partial enlarged structural schematic diagram of the adjustable discharge tray assembly;

[0029] Fig.11 It is a schematic diagram of the internal structure of the adjustable discharge tray assembly;

[0030] Fig.12 for Fig.11 Schematic diagram of the cross-sectional structure.

[0031] In the figure: 1, frame; 2, gear rack transmission mechanism; 201, support rail; 202, support block; 203, support rod; 204, first connecting rod; 205, second connecting rod; 206, rack body; 207, gear body; 208, third connecting rod; 209, mounting rod; 210, transmission rail; 211, transmission frame; 3, adjustable discharge tray assembly; 301, bracket; 302, tray side frame; 303, tray peripheral frame; 304, feed pipe; 305, outer ring; 306, seat body; 307, lever body; 308, mounting block; 309, reset spring; 310, limiter; 311, ejector; 312, second pin shaft; 313, flip cover; 314, handle; 315, limiter groove; 316, limiter block; 317, top plate; 318, first motor; 319, driving wheel; 320, outer gear ring; 321, inner ring; 322, elastic plate; 323, vibration spring; 324, guide plate; 4, pointed cone seeding head assembly; 401, installation Mounting frame; 402, second motor; 403, disc; 404, transmission groove; 405, positioning shaft; 406, transmission rod; 407, transmission column; 408, discharge pipe; 409, limit sleeve; 410, limit shaft; 411, transmission sleeve; 412, first ring sleeve; 413, second ring sleeve; 414, mounting piece; 415, connecting rod; 416, laminating film; 417, V-shaped frame; 418, connecting pipe; 5, meshing drive assembly; 501, drive motor; 502, no Complete gear; 503, second rotating shaft; 504, first transmission tooth; 505, mounting plate; 506, transmission bar; 507, hinge; 508, second transmission tooth; 6, mobile body; 601, mounting shaft; 602, first wheel body; 603, second wheel body; 7, liquid fertilizer spreading device; 701, box body; 702, liquid inlet; 703, piston sleeve; 704, piston rod; 705, connecting frame; 706, nozzle; 8, push handle; 9, second pressure sensor. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. The following describes various embodiments of the present invention in detail in conjunction with the drawings.

[0033] Example 1

[0034] See also Figures 1 to 12The present invention preferably provides a technical solution: a self-propelled seeder suitable for trench crops, comprising: a mobile body 6, and a transmission frame assembly connected to the forward direction of the mobile body 6; a meshing drive assembly 5 is arranged at the bottom of the mobile body 6, which is used to drive the switching operation of the mobile body 6 and the transmission frame assembly respectively; an adjustable discharge tray assembly 3 is arranged at the upper part of the transmission frame assembly near the front end, which is used to select the discharge of the number of crop particles; and a pointed cone seeding head assembly 4 is arranged at the lower part of the transmission frame assembly near the front end, and the bottom of the adjustable discharge tray assembly 3 is connected to the pointed cone seeding head assembly 4; the pointed cone seeding head assembly 4 includes an expansion frame assembly, and a coating 416 covered with the expansion frame assembly, when the transmission frame assembly is running, the pointed cone seeding head assembly 4 can be used to insert the soil, and the expansion frame assembly drives the coating 416 to expand and open to release the crop particles, so as to realize self-propelled seeding.

[0035] The present application takes into account that in the actual sowing process of crop seeds, different crops have different sowing quantities in a single pit, and secondly, the sowing quality must be guaranteed. Therefore, the present invention not only improves the sowing quality of crops through the effective coordination of various structures, but also realizes the adjustment of the number of crop particles;

[0036] Specific combination Figure 1-3 As shown, the mobile vehicle body 6 and the transmission frame assembly provided in the present application, that is, under the action of the meshing drive assembly 5, the walking state of the vehicle body matches the running state of the transmission frame assembly, when walking fast, the sowing speed also increases, and when walking slowly, the sowing speed also decreases, so that when dealing with mountainous areas and inter-ditch sowing, the sowing speed can be adjusted adaptively with the walking speed of the vehicle body, effectively avoiding the situation of uneven seed sowing spacing and multiple or few seeds in each hole;

[0037] The adjustable discharge tray assembly 3 and the pointed cone seeding head assembly 4 are respectively arranged at the upper and lower parts of the front end of the transmission frame assembly, and the two are connected. While realizing the selective discharge of the crop particles, the inserted seeding of the crop is realized. The known transmission frame assembly not only serves as the mounting structure of the adjustable discharge tray assembly 3 and the pointed cone seeding head assembly 4, but also serves as the driving structure of the two. At the same time, the transmission frame assembly and the mobile vehicle body 6 can realize reciprocating operation under the action of the meshing driving assembly 5. Therefore, when the mobile vehicle body 6 is running, the adjustable discharge tray assembly 3 and the pointed cone seeding head assembly 4 are in a standby state, and when the transmission frame assembly is running, the two are in a sowing working state, thereby reflecting the self-propelled sowing design inspiration of the present invention;

[0038] The present invention realizes the operation mode of stopping the machine for sowing and stopping the machine for sowing while moving, that is, under the action of the meshing drive component 5, the walking state of the vehicle body matches the operating state of the transmission frame component. When the walking is fast, the sowing speed is also increased, and when the walking is slow, the sowing speed is also reduced. Therefore, when coping with sowing in mountainous areas and between ditches, the sowing speed can be adaptively adjusted according to the walking speed of the vehicle body, effectively avoiding the situation of uneven seed sowing spacing and multiple or few seeds in each hole. In addition, the adjustable discharge tray component 3 and the pointed cone seeding head component 4 respectively arranged above and below the transmission frame component can further realize the selective discharge of crop particles while realizing the inserted sowing of crops, thereby improving the sowing quality and application scope of the device.

[0039] Example 2

[0040] As another embodiment of the present invention, the transmission frame assembly includes a connecting rod transmission frame and a gear rack transmission mechanism 2. The gear rack transmission mechanism 2 acts between the connecting rod transmission frame and the meshing drive assembly 5 to drive the connecting rod transmission frame to operate; the connecting rod transmission frame is provided with two groups and is distributed on both sides of the mobile body 6, each group of connecting rod transmission frames includes a support rail 201, and a support block 202 slidably installed inside the support rail 201, and a support rod 203 fixed on the support block 202, and the upper and lower parts of the support rods 203 are respectively rotatably connected to the first connecting rod 204, and the two first connecting rods 204 are rotatably connected to the second connecting rod 205 at one end away from the support rod 203, and the adjustable discharge tray assembly 3 is installed between the second connecting rods 205 where the two groups of connecting rod transmission frames are located; it also includes a first rotating shaft arranged at the front end of the support rail 201, and the third connecting rod 208 fixed at the inner end of the first rotating shaft is rotatably connected to the middle part of the first connecting rod 204 placed in the lower position through a first pin shaft.

[0041] In this embodiment, the transmission frame assembly is composed of a connecting rod transmission frame and a gear rack transmission mechanism 2, and the gear rack transmission mechanism 2 serves as the operating structure of the connecting rod transmission frame, and the connecting rod transmission frame serves as the overall operating mechanism of the adjustable discharge tray assembly 3 and the pointed cone seeding head assembly 4. Figure 2-4 As shown, the quadrilateral frame structure where the connecting rod transmission frame is located has a support rod 203 on one side fixed to a support block 202 provided in the support rail 201, and a second connecting rod 205 on the other side connected to the adjustable discharge tray assembly 3, and a first connecting rod 204 placed on the lower side, the middle of which is connected to the first rotating shaft at the front end of the support rail 201 through a third connecting rod 208. Therefore, when the rack and pinion transmission mechanism 2 is running, it provides power through the meshing drive assembly 5, which can drive the first rotating shaft and the third connecting rod 208 to deflect, thereby realizing the deformation movement of the quadrilateral frame structure, and due to the characteristics of each structure, the second connecting rod 205 can realize longitudinal movement, further realizing the longitudinal operation of the adjustable discharge tray assembly 3;

[0042] Specific, combined Figure 4 ,3 As shown, it is worth noting that the movement of the rack and pinion transmission mechanism 2 here is a reciprocating motion;

[0043] When the third connecting rod 208 deflects clockwise under the action of the rack and pinion transmission mechanism 2, Figure 4 For example, at this time, the support block 202 can be driven to move right first and then left inside the support rail 201. It is worth noting that the changes in this process are based on the horizontal state of the third connecting rod 208 as the switching point. Figure 4 When the state deviates clockwise and gradually becomes horizontal, the quadrilateral frame structure can push the support block 202 to move rightward, and as the third connecting rod 208 crosses the horizontal line and deviates further downward, it drives the support block 202 to move leftward. It is worth noting that the pointed cone seeding head assembly 4 always ensures the descending process during this process, thereby realizing the pointed cone seeding head assembly 4 inserting the soil and further digging the soil for seeding;

[0044] When the rack and pinion transmission mechanism 2 runs in the reverse direction, the third connecting rod 208 deflects counterclockwise, which drives the support block 202 to move further to the left and to the limit value, thereby realizing the resetting process of the pointed cone seeding head assembly 4, and so on.

[0045] Furthermore, the rack and pinion transmission mechanism 2 is provided with two groups and respectively drives the movement of the two groups of connecting rod transmission frames, each group of rack and pinion transmission mechanism 2 includes a mounting rod 209 fixed to the middle of the support rail 201, and a transmission frame 211 fixed on the mounting rod 209; it also includes a transmission rail 210, which is slidably installed inside the transmission frame 211, one end of which is connected to the meshing drive component 5, and the other end of which is fixed with a rack body 206 through a connecting bar, when the meshing drive component 5 is running, it is used to drive the transmission rail 210 to move inside the transmission frame 211 and realize the horizontal movement of the rack body 206; and a gear body 207 fixed to the middle of the first rotating shaft, and the gear body 207 is meshed with the rack body 206.

[0046] Combination Figure 3 As shown, the transmission rail 210 is slidably installed inside the transmission frame 211, and one end of it is connected to the meshing drive component 5, and the other end of it is fixed with the rack body 206 through a connecting bar. Therefore, under the action of the meshing drive component 5, the transmission rail 210 can be driven to run back and forth, thereby realizing the horizontal reciprocating motion of the rack body 206, and at the same time driving the gear body 207 meshing with the rack body 206 and the first rotating shaft fixed to the gear body 207 to reciprocate, further realizing the forward and reverse reciprocating motion of the third connecting rod 208.

[0047] Example 3

[0048] As another embodiment of the present invention, the mobile vehicle body 6 includes a vehicle frame 1, and a mounting shaft 601 rotatably connected to the opposite surface of the vehicle frame 1, and both ends of the mounting shaft 601 pass through the through holes opened in the side wall of the vehicle frame 1 and are fixed with a first wheel body 602; and also includes a second wheel body 603 respectively arranged on the opposite sides of the middle of the two support rails 201, Figure 2 , 3 shown.

[0049] Furthermore, two groups of meshing drive components 5 are provided and distributed on opposite surfaces of the frame 1; each group of meshing drive components 5 includes a driving motor 501 arranged on the inner wall of the frame 1, and an incomplete gear 502 fixed to the output end of the driving motor 501; a second transmission tooth 508 is fixed at one end of the mounting shaft 601; it also includes a second rotating shaft 503 rotatably connected to the inner wall of the frame 1, and a first transmission tooth 504 fixed in the middle of the second rotating shaft 503, which is staggered with the second transmission tooth 508 and meshes with the incomplete gear 502, and the radius of the two is half of the radius of the incomplete gear 502; a mounting plate 505 and a shaft body arranged on the mounting plate 505 are also fixed at the end of the second rotating shaft 503 away from the frame 1, and a transmission bar 506 rotatably connected to the shaft body, and its end away from the shaft body is hinged to the end of the transmission rail 210 away from the rack body 206 through a hinge 507.

[0050] In this embodiment, combined with Figure 3 As shown, the incomplete gear 502 is meshed with the first transmission tooth 504 and the second transmission tooth 508, and the radius of the incomplete gear 502 is twice the radius of the first transmission tooth 504 and the second transmission tooth 508. At the same time, the incomplete gear 502 is a wheel structure with half teeth, so when the incomplete gear 502 rotates one circle, it drives the first transmission tooth 504 and the second transmission tooth 508 to rotate one circle respectively, so as to realize the switching operation of the mobile body 6 and the transmission frame assembly;

[0051] It is worth noting that the mounting plate 505 is connected to the first transmission tooth 504 via the second rotating shaft 503, and the shaft on the mounting plate 505, on which the transmission bar 506 rotatably connected, is connected to the transmission rail 210 via the hinge 507. Therefore, when the mounting plate 505 rotates one circle, the transmission bar 506 is driven to deflect, and the transmission rail 210 is further driven to move. Since the transmission rail 210 is limited inside the transmission frame 211, the transmission rail 210 only performs lateral reciprocating motion, while realizing the lateral reciprocating motion of the rack body 206 and the forward and reverse reciprocating motion of the gear body 207.

[0052] Example 4

[0053] As other embodiments of the present invention, two groups of adjustable discharge tray assemblies 3 are provided and are symmetrically distributed; each group of adjustable discharge tray assemblies 3 includes a shell, which is composed of a tray side frame 302 that is fixed on both sides and a tray peripheral frame 303 that is movable in the middle; and an inner ring 321 and an outer ring 305 that are fixed between the two tray side frames 302 and distributed inside and outside, and the inner ring 321 and the outer ring 305 are both annular structures with an opening at the lower end; it also includes a lever control material assembly arranged at the opening of the inner ring 321 and the outer ring 305, and the lever control material assembly, the inner ring 321, and the tray side frame 302 together constitute a material storage chamber, and the lever control material assembly is used to control the opening and closing of the material storage chamber and realize the quantity control of the discharge; and a feed pipe 304 and a connecting pipe 418 distributed on the side wall and the bottom wall of the tray side frame 302, and the feed pipe 304 is connected to the material storage chamber, and the connecting pipe 418 is connected to the pointed cone seeding head assembly 4.

[0054] Combination Figure 6 , 10 As shown in Figures 11 and 12, the housing is composed of a disk side frame 302 with fixed sides and a disk peripheral frame 303 with a movable middle portion, and the inner ring 321 and the outer ring 305 in the middle portion of the housing are both annular structures with openings at the lower ends. Fig.11 As shown, the lever control assembly is arranged at the opening of the two, and the inner ring 321 and the disk side frame 302 respectively constitute the bottom wall, outer frame and side wall of the storage cavity, and the feed pipe 304 is arranged on the side wall of the disk side frame 302 and communicates with the storage cavity, and the connecting pipe 418 is arranged at the bottom of the disk side frame 302 ... inner ring 321 and the disk side frame 302 respectively constitute the bottom wall, outer frame and side wall of the storage cavity Fig.12 As shown, the lever material control assembly is not only a control structure for connecting the material storage chamber with the connecting pipe 418, but also a control structure for the amount of material discharged;

[0055] Therefore, by driving the lever control assembly, the crop particles in the storage chamber can enter the pointed cone seeding head assembly 4 through the connecting tube 418, and the specific operation and quantity control of the discharge can refer to the specific description of the lever control assembly below.

[0056] Furthermore, a material guide plate 324 is provided at the opening of the outer ring 305 , and the material guide plate 324 is provided on a side of the outer ring 305 close to the disk circumferential frame 303 .

[0057] Combination Fig.12 As shown, the opening and closing of the inner ring 321, that is, the opening and closing of the storage chamber is controlled by the lever control assembly. Therefore, when the storage chamber is opened, the crop particles can reach the opening of the outer ring 305. At this time, the guide plate 324 at the opening of the outer ring 305 can guide the crop particles, so that the crop particles move toward the disk side frame 302 and smoothly pass through the connecting tube 418 into the interior of the pointed cone seeding head assembly 4. This design sets the connecting tube 418 at the bottom of the disk side frame 302 in a fixed state, taking into account the situation that the rotation of the disk frame 303 will affect the discharge of crop particles.

[0058] Furthermore, the lever material control assembly consists of a lever assembly and a trigger assembly that drives the lever assembly to operate, and the trigger assembly is distributed in an annular manner on the side wall of the disk frame 303; the lever assembly includes a seat body 306 arranged on the side wall of the disk side frame 302 and placed inside the inner ring 321, and a lever body 307 rotatably connected to the side wall of the seat body 306, which consists of a limit end and a trigger end, and the trigger end passes through the openings at the lower ends of the inner ring 321 and the outer ring 305 in sequence and extends to the forward side of the trigger assembly; and a limit member 310 arranged on the seat body 306, the limit member 310 is in contact with the limit end where the lever body 307 is located; it also includes a mounting block 308 arranged on the seat body 306, and a reset spring 309 connected to the mounting block 308 and the middle part of the lever body 307 is used for resetting the lever body 307.

[0059] Combination Fig.11 As shown, the known lever material control assembly is composed of a lever assembly and a trigger assembly that drives the lever assembly to operate, and the trigger assembly is annularly mounted on the disk frame 303, so when the disk frame 303 rotates, the lever assembly can be brought into contact with the trigger assembly. The control of the discharge quantity of the present application is achieved by the contact quantity between the lever assembly and the trigger assembly;

[0060] Specifically, the seat body 306 is provided on the side wall of the disk side frame 302, and the side wall thereof is rotatably connected to the lever body 307, one end of which extends toward the trigger assembly and the other end is limited by the limiter 310. Therefore, when the disk peripheral frame 303 rotates, the present application is preferably Fig.11 The lever body 307 rotates clockwise. When the trigger assembly contacts the lever body 307, the lever body 307 can be deflected clockwise. Here, the reset spring 309 is stretched, and the push rod 311 provided at the end of the lever body 307 contacts the flip cover 313, so that the flip cover 313 deflects around the second pin shaft 312. At this time, the lower end opening of the inner ring 321 is opened to realize the single-grain discharge of the crop. Subsequently, when the lever body 307 passes over the trigger assembly and contacts the lower trigger assembly, the next single-grain discharge of the crop is realized. Therefore, the discharge quantity is adjusted by adjusting the contact quantity of the lever assembly and the trigger assembly.

[0061] Furthermore, each trigger assembly includes a limit groove 315 provided on the side wall of the disk frame 303, a limit block 316 provided in the limit groove 315, a top plate 317 fixed on the side wall of the limit groove 315 in contact with the trigger end of the lever body 307 and in an Ω shape; and a threaded hole provided on the side wall of the disk frame 303 and connected to the limit groove 315; and also includes a screw arranged inside the threaded hole, and one end of the screw extends into the limit groove 315 and is rotatably connected to the limit block 316, and the other end of the screw faces outward and is fixed with a handle 314.

[0062] In this embodiment, combined with Fig.11As shown, the limit groove 315 opened on the side wall of the disk frame 303 is connected to the threaded hole, and the limit block 316 arranged in the limit groove 315 can realize the movement of the limit block 316 under the action of the screw connected to it, so as to realize the protrusion and retraction of the top plate 317. When protruding, it contacts with the rotatable lever body 307, which triggers the lever body 307 to deflect once, so that one discharge of the material storage chamber is realized, that is, the number of particles is one. The disk frame 303 is set to rotate one circle each time discharging. When the number of protrusions of the adjustment 317 increases, the protruding top plate 317 triggers the lever body 307 to deflect more times. After one circle, the number of top plates 317 in the protruding state is the number of seeds that need to be discharged.

[0063] Furthermore, an elastic plate 322 and a vibration spring 323 connected between the elastic plate 322 and the seat body 306 are also provided on one side of the seat body 306 close to the material storage cavity.

[0064] Combination Fig.11 , 12 As shown, the elastic plate 322 is arranged on one side of the opening of the inner ring 321. When the lever body 307 is deflected by the drive of the trigger assembly and resets under the action of the reset spring 309, vibration can be generated to make the elastic plate 322 shake. At the same time, the crop particles entering the storage cavity through the feed pipe 304 can fall onto the surface of the elastic plate 322, further making the elastic plate 322 shake, so as to guide the crop particles to the opening of the inner ring 321, thereby facilitating the smooth discharge of the crop particles.

[0065] Furthermore, the drive wheel assembly includes a mounting seat fixed to the side wall of the disk side frame 302, and a first motor 318 disposed on the mounting seat, and a drive wheel 319 fixed at the output end of the first motor 318, which is engaged with an outer gear ring 320 fixed to the outer wall of the disk peripheral frame 303, and is combined with the outer gear ring 320 to form a driving wheel. Fig.10 , 11 shown.

[0066] Example 5

[0067] As other embodiments of the present invention, the extension frame assembly includes a discharge pipe 408, which is fixed at the bottom of two connecting pipes 418 and connected thereto; and a first ring sleeve 412 and a second ring sleeve 413 which are arranged at the lower part of the discharge pipe 408 and are distributed up and down, and the first ring sleeve 412 is slidably installed on the discharge pipe 408, and the second ring sleeve 413 is fixed to the side wall near the bottom end of the discharge pipe 408; and a mounting member 414 and a V-shaped frame 417 which are respectively annularly arranged on the first ring sleeve 412 and the second ring sleeve 413, and the coating 416 is installed on the outer wall of the V-shaped frame 417; and also includes a connecting rod 415 hinged on the mounting member 414, and the end of the connecting rod 415 away from the mounting member 414 is hinged to the upper end of the V-shaped frame 417.

[0068] Combination Figure 5 As shown, the discharge pipe 408 is fixed to the bottom ends of the two connecting pipes 418 and is connected thereto, and the first ring sleeve 412 and the second ring sleeve 413 are respectively arranged at the lower part of the discharge pipe 408, and the outer walls of the two ring sleeves are respectively annularly distributed with mounting members 414 and V-shaped frames 417, and the bottom ends of the plurality of V-shaped frames 417 can be used to expand and support the covering film 416, and the top ends thereof are connected to the mounting members 414 through connecting rods 415, and at the same time, the first ring sleeve 412 is slidably installed with the discharge pipe 408, and the second ring sleeve 413 is connected to the side of the discharge pipe 408 near the bottom end. The wall is fixed, so when the first ring sleeve 412 slides up and down, the V-shaped frame 417 can be pushed to deflect with the second ring sleeve 413, that is, its own corner as the axis, so as to achieve the expansion of the bottom end of the V-shaped frame 417, and further achieve the expansion and contraction of the coating 416. When the coating 416 is in an expanded state, the crop particles dropped from the adjustable discharge tray assembly 3 can fall into the pit expanded and opened by the coating 416, thereby realizing the sowing process, and when the coating 416 is in a contracted state, it can be used to receive the crop particles.

[0069] Furthermore, it also includes a transmission disk assembly, which is used to drive the movement of the first ring sleeve 412; the transmission disk assembly includes a mounting frame 401 fixed at the bottom of one of the brackets 301, and a second motor 402 arranged on the side wall of the mounting frame 401, and also includes a disk body 403 fixed at the output end of the second motor 402, and the transmission groove 404 opened on the disk body 403 is eccentrically arranged; and a limiting sleeve 409 slidably installed in the middle of the discharge pipe 408, and the limiting sleeve 409 is fixedly connected to the first ring sleeve 412 through a transmission sleeve 411 fixed at its bottom; it also includes a transmission rod 406 arranged at one end of the mounting frame 401 away from the discharge pipe 408, and the limiting shaft 410 arranged at the U-shaped end of the transmission rod 406 can be limited and moved inside the limiting sleeve 409, and the transmission column 407 arranged in the middle can rotate inside the transmission groove 404.

[0070] Combination Figure 6 , 7 As shown in Figures 8 and 9, the disk body 403 is fixed at the output end of the second motor 402, and the transmission groove 404 opened thereon is biased, and the transmission rod 406 is connected to the mounting frame 401 at one end through the positioning shaft 405, and the transmission column 407 arranged in the middle can move inside the transmission groove 404, and the limiting shaft 410 arranged at the other end can move inside the limiting sleeve 409, and the limiting sleeve 409 is sleeved on the discharge pipe 408 and connected to the first ring sleeve 412 through the transmission sleeve 411. Therefore, when the disk body 403 rotates, the transmission column 407 can be moved up and down, thereby making the transmission rod 406 deflected up and down. Since the limiting shaft 410 and the limiting sleeve 409 are limitedly installed, the limiting sleeve 409 and the transmission sleeve 411 can move up and down, and the longitudinal movement of the first ring sleeve 412 is further driven.

[0071] Example 6

[0072] As other embodiments of the present invention, a first pressure sensor and a second pressure sensor 9 are respectively provided at both ends of each support block 202, and the first pressure sensor and the second pressure sensor 9 are respectively used to control the operation of the pointed cone seeding head assembly 4 and the adjustable discharge tray assembly 3.

[0073] Combination Figure 3 As shown, the first pressure sensor and the second pressure sensor 9 are respectively arranged at both ends of the support block 202. As can be seen from Example 2, when the third connecting rod 208 runs clockwise, Figure 3 , 4 As shown, the support block 202 can be moved rightward to the end of the support rail 201 first, and this process can trigger the first pressure sensor ( Figure 3 , the right end of the support block 202) operates, the first pressure sensor controls the second motor 402 where the expansion frame assembly is located to work, and it is known that the pointed cone seeding head assembly 4 is in a descending process during this process. Therefore, when the first pressure sensor is triggered, it can send a trigger signal to the single-chip microcomputer, and the single-chip microcomputer controls the second motor 402 to operate, and the covering film 416 expands and closes once, realizing a soil expansion and sowing process;

[0074] When the third connecting rod 208 rotates counterclockwise, the support block 202 moves further to the left and triggers the second pressure sensor 9. During this process, the extension frame assembly is in a retracted and raised state. Similarly, the second pressure sensor 9 controls the operation of the first motor 318 where the adjustable discharge tray assembly 3 is located, that is, the adjustable discharge tray assembly 3 operates and realizes discharge, accumulating crop particles for the next sowing.

[0075] Example 7

[0076] As other embodiments of the present invention, a liquid fertilizer spreading device 7 is provided at the end of the moving body 6 in the forward direction, and the liquid fertilizer spreading device 7 includes a box body 701 arranged on the top of the frame 1, and a plurality of liquid inlets 702 arranged on the top of the box body 701; it also includes a spray head assembly arranged on the side wall of the box body 701; the spray head assembly includes a piston sleeve 703 fixed to the lower wall of the box body 701, and a through pipe arranged at the side input port of the piston sleeve 703 is connected to the lower part of the box body 701, and a spray head 706 arranged at the bottom output port is used for spraying liquid; and a first one-way valve and a second one-way valve are respectively arranged at the input port and the output port of the piston sleeve 703; it also includes a piston plate arranged inside the piston sleeve 703, and a piston rod 704 fixed on the side wall of the piston plate, and its end away from the piston plate is fixedly connected to the transmission frame 211 where the two sets of gear rack transmission mechanisms 2 are located through a connecting frame 705.

[0077] Combination Figure 2 , 3As shown in 4, the piston sleeve 703 is arranged on the side wall of the box body 701, and the through pipe arranged on the side input port is connected to the lower part of the box body 701. The nozzle 706 arranged on the bottom output port is used for spraying liquid. In conjunction with the first one-way valve and the second one-way valve at the input port and the output port of the piston sleeve 703, when the connecting frame 705 and the piston rod 704 are moved by the power provided by the movement of the transmission rail 210, the piston plate arranged in the piston sleeve 703 can be operated, thereby realizing the suction and spraying process of the fertilizer.

[0078] Furthermore, a push handle 8 is provided on the upper rear portion of the box body 701 .

[0079] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. There are many ways of detachable installation, for example, it can be through the method of plug-in and snap-on matching, and for example, through the method of bolt connection, etc.

[0080] The specific description of the present invention in the above embodiments is only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Technical engineers in this field may make some non-essential improvements and adjustments to the present invention based on the contents of the above invention, which fall within the scope of protection of the present invention.

Claims

1. A self-propelled seeder suitable for trench crops, characterized in that: include: A moving vehicle body (6), and a transmission frame assembly connected to the moving vehicle body (6) in the forward direction; The bottom of the mobile body (6) is provided with a meshing drive assembly (5) for driving the mobile body (6) and the transmission frame assembly to switch between the two. An adjustable discharging tray assembly (3) is provided at the upper part of the transmission frame assembly near the front end, and is used for discharging the selected crop particles; and a pointed cone seeding head assembly (4) arranged at the lower part of the front end of the transmission frame assembly, wherein the bottom of the adjustable discharge tray assembly (3) is connected to the pointed cone seeding head assembly (4); The pointed cone seeding head assembly (4) includes an expansion frame assembly and a coating (416) covering the expansion frame assembly. When the transmission frame assembly is in operation, the pointed cone seeding head assembly (4) can be inserted into the soil, and the expansion frame assembly drives the coating (416) to expand and open to release crop particles, thereby realizing self-propelled seeding.

2. A self-propelled seeder suitable for trench crops according to claim 1, characterized in that: The transmission frame assembly comprises a connecting rod transmission frame and a gear rack transmission mechanism (2), wherein the gear rack transmission mechanism (2) acts between the connecting rod transmission frame and the meshing drive assembly (5) and is used to drive the connecting rod transmission frame to operate; The connecting rod transmission frames are provided in two groups and are distributed on both sides of the mobile vehicle body (6), each group of connecting rod transmission frames comprises a support rail (201) and a support block (202) slidably mounted inside the support rail (201), and a support rod (203) fixed on the support block (202), the upper and lower parts of which are rotatably connected to the first connecting rod (204), and the ends of the two first connecting rods (204) away from the support rod (203) are rotatably connected to the second connecting rod (205), and the adjustable discharge tray assembly (3) is installed between the second connecting rods (205) where the two groups of connecting rod transmission frames are located; It also includes a first rotating shaft arranged at the front end of the support rail (201), and a third connecting rod (208) fixed at the inner end of the first rotating shaft is rotatably connected to the middle part of the first connecting rod (204) disposed at the lower position through a first pin shaft.

3. A self-propelled seeder suitable for trench crops according to claim 2, characterized in that: The rack and pinion transmission mechanism (2) is provided with two groups and respectively drives the movement of two groups of connecting rod transmission frames, and each group of rack and pinion transmission mechanism (2) comprises a mounting rod (209) fixed to the middle part of the support rail (201), and a transmission frame (211) fixed to the mounting rod (209); The transmission rail (210) is also included. The transmission rail (210) is slidably mounted inside the transmission frame (211), one end of which is connected to the meshing drive assembly (5), and the other end of which is fixed with a rack body (206) via a connecting bar. When the meshing drive assembly (5) is in operation, the transmission rail (210) is used to drive the transmission rail (210) to move inside the transmission frame (211) and realize horizontal movement of the rack body (206); and a gear body (207) fixed at the middle of the first rotating shaft, wherein the gear body (207) is meshed with the rack body (206).

4. A self-propelled seeder suitable for trench crops according to claim 1, characterized in that: The mobile vehicle body (6) comprises a vehicle frame (1), and a mounting shaft (601) rotatably connected to the opposite side of the vehicle frame (1), and both ends of the mounting shaft (601) respectively pass through through holes provided in the side wall of the vehicle frame (1) and are fixed with a first wheel body (602); It also includes second wheel bodies (603) respectively arranged on the opposite sides of the middle parts of the two branch rails (201).

5. A self-propelled seeder suitable for trench crops according to claim 4, characterized in that: The meshing drive components (5) are provided in two groups and are distributed on opposite surfaces of the frame (1); Each set of meshing drive components (5) comprises a drive motor (501) arranged on the inner wall of the frame (1), and an incomplete gear (502) fixed to the output end of the drive motor (501); a second transmission tooth (508) is fixed to one end of the mounting shaft (601); It also includes a second rotating shaft (503) rotatably connected to the inner wall of the frame (1), and a first transmission tooth (504) fixed in the middle of the second rotating shaft (503), which is staggeredly meshed with the second transmission tooth (508) of the incomplete gear (502), and the radius of the two is half of the radius of the incomplete gear (502); The end of the second rotating shaft (503) away from the vehicle frame (1) is also fixed with a mounting plate (505) and a shaft body arranged on the mounting plate (505), and a transmission bar (506) rotatably connected to the shaft body, and its end away from the shaft body is hinged to an end of the transmission rail (210) away from the rack body (206) through a hinge (507).

6. A self-propelled seeder suitable for trench crops according to claim 1, characterized in that: The adjustable material discharging tray assembly (3) is provided in two groups and is symmetrically distributed; each group of the adjustable material discharging tray assembly (3) comprises a shell, and the shell is composed of tray side frames (302) in a fixed state on both sides, and a tray peripheral frame (303) in a movable state in the middle; and an inner ring (321) and an outer ring (305) fixed between the two disk side frames (302) and distributed inside and outside, wherein the inner ring (321) and the outer ring (305) are both annular structures with an opening at the lower end; It also includes a lever material control assembly arranged at the opening of the inner ring (321) and the outer ring (305), and the lever material control assembly, the inner ring (321), and the disk side frame (302) together constitute a material storage cavity, and the lever material control assembly is used to control the opening and closing of the material storage cavity and realize the quantity control of the discharged material; and a feed pipe (304) and a connecting pipe (418) distributed on the side wall and the bottom wall of the disk side frame (302), wherein the feed pipe (304) is connected to the material storage cavity, and the connecting pipe (418) is connected to the pointed cone seeding head assembly (4); A material guide plate (324) is also provided at the opening of the outer ring (305), and the material guide plate (324) is arranged on a side of the outer ring (305) close to the disk circumferential frame (303).

7. A self-propelled seeder suitable for trench crops according to claim 6, characterized in that: The lever material control assembly is composed of a lever assembly and a trigger assembly for driving the lever assembly to operate, and the trigger assembly is distributed in an annular shape on the side wall of the disk frame (303); The lever assembly comprises a seat body (306) arranged on the side wall of the disk side frame (302) and placed inside the inner ring (321), and a lever body (307) rotatably connected to the side wall of the seat body (306), which comprises a limit end and a trigger end, and the trigger end of the lever body (307) passes through the openings at the lower ends of the inner ring (321) and the outer ring (305) in sequence and extends to the forward side of the trigger assembly; and a limiting member (310) disposed on the seat body (306), wherein the limiting member (310) contacts a limiting end of the lever body (307); It also includes a mounting block (308) disposed on the seat body (306), and a reset spring (309) connected between the mounting block (308) and the middle part of the lever body (307) for resetting the lever body (307); Each group of the triggering components comprises a limiting groove (315) provided on the side wall of the disk frame (303), a limiting block (316) arranged in the limiting groove (315), and a top plate (317) fixed on the side wall of the limiting groove contacts the triggering end of the lever body (307) and forms an Ω shape; and a threaded hole provided on the side wall of the disk peripheral frame (303) and connected to the limiting groove (315); It also includes a screw rod arranged inside the threaded hole, one end of the screw rod extends into the limiting groove (315) and is rotatably connected to the limiting block (316), and the other end of the screw rod faces outward and is fixed with a handle (314).

8. The self-propelled seeder suitable for trench crops according to claim 1, characterized in that: The expansion rack assembly includes a discharge pipe (408), and the discharge pipe (408) is fixed to the bottom of the two connecting pipes (418) and communicated therewith; and a first ring sleeve (412) and a second ring sleeve (413) which are arranged at the lower part of the discharge pipe (408) and are distributed in an upper and lower manner, wherein the first ring sleeve (412) is slidably installed with the discharge pipe (408), and the second ring sleeve (413) is fixed with the side wall close to the bottom end of the discharge pipe (408); and a mounting member (414) and a V-shaped frame (417) respectively arranged in an annular shape on the first ring sleeve (412) and the second ring sleeve (413), wherein the coating (416) is mounted on the outer wall of the V-shaped frame (417); It also includes a connecting rod (415) hinged on the mounting member (414), and one end of the connecting rod (415) away from the mounting member (414) is hinged to the upper end of the V-shaped frame (417).

9. A self-propelled seeder suitable for trench crops according to claim 2, characterized in that: A first pressure sensor and a second pressure sensor (9) are respectively provided at both ends of each support block (202), and the first pressure sensor and the second pressure sensor (9) are respectively used to control the operation of the pointed cone seeding head assembly (4) and the adjustable discharge tray assembly (3).

10. A self-propelled seeder suitable for trench crops according to claim 4, characterized in that: A liquid fertilizer spreading device (7) is provided at the end of the moving vehicle body (6) in the forward direction, and the liquid fertilizer spreading device (7) comprises a box body (701) arranged on the top of the vehicle frame (1), and a plurality of liquid inlets (702) arranged on the top of the box body (701); It also includes a spray head assembly arranged on the side wall of the box body (701); The spray head assembly comprises a piston sleeve (703) fixed to the lower wall of the box body (701), and a through pipe arranged at the side input port of the piston sleeve (703) is connected to the lower part of the box body (701), and a spray head (706) arranged at the bottom output port is used for spraying liquid; and a first one-way valve and a second one-way valve respectively arranged at the input port and the output port of the piston sleeve (703); It also includes a piston plate arranged inside the piston sleeve (703), and a piston rod (704) fixed to the side wall of the piston plate, and the end of the piston rod away from the piston plate is fixedly connected to the transmission frame (211) where the two sets of gear rack transmission mechanisms (2) are located through a connecting frame (705).

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