Agricultural seeding machine with soil covering function

Abstract

The invention relates to the technical field of agricultural seeding, and discloses an agricultural seeding machine with a soil covering function, the agricultural seeding machine comprises an agricultural seeding machine rack, a drilling mechanism, a seed placing mechanism and a soil covering mechanism, the front end of the agricultural seeding machine rack extends upwards, and a front axle rod is rotatably connected to the middle of the agricultural seeding machine rack in a penetrating manner; a rear shaft rod is rotatably connected to the middle of the rear end of the agricultural seeder rack in a penetrating mode, rear wheels are installed at the two ends of the rear shaft rod, the drilling mechanism is fixedly arranged in the middle of the agricultural seeder rack, the seed placing mechanism is fixedly arranged in front of the agricultural seeder rack, and the soil covering mechanism is fixedly arranged in rear of the agricultural seeder rack. And the soil covering mechanism is positioned behind the drilling mechanism. According to the agricultural seeding machine with the soil covering function, the drilling force can be adjusted according to different soil conditions, the seeding precision is improved, seeds can be effectively covered, soil can be effectively compacted, the sustainable development of agriculture is promoted, and the agricultural seeding machine can work in different types of farmlands.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural sowing, and in particular to an agricultural seeder with a soil covering function. Background Art

[0002] Seeders are planting machines that sow crop seeds. Seeders used for a certain type of crop are often named after the crop type, such as grain drills, corn seed drills, cotton seed drills, forage spreaders, etc.

[0003] The existing agricultural seeder does not have the function of covering the soil when in use, which means that the seeds need to be covered manually after sowing. The covering process is time-consuming and laborious, which increases the workload of farmers and affects the convenience of using the agricultural seeder. In addition, the sowing machine is easily blocked by soil, which makes it difficult for the seeds to be sown into the soil, resulting in poor sowing effects and affecting the efficiency of the sowing machine. Therefore, a corresponding technical solution needs to be designed to solve the problem. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an agricultural seeder with a soil covering function, which solves the technical problems that manual soil covering is time-consuming and labor-intensive, increases work intensity, affects the convenience of using the agricultural seeder, is easily blocked by soil, and seeds cannot be sown into the soil, thus affecting the sowing efficiency of the seeder.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: an agricultural seeder with a soil covering function, comprising an agricultural seeder frame, a drilling mechanism, a seed placing mechanism and a soil covering mechanism, the front end of the agricultural seeder frame extends upward and is rotatably connected to a front axle rod through the middle, front wheels are installed at both ends of the front axle rod, a rear end of the agricultural seeder frame is rotatably connected to a rear axle rod through the middle, rear wheels are installed at both ends of the rear axle rod, the diameter of the front wheel is greater than the diameter of the rear wheel, and the side ends of the front axle rod and the rear axle rod are respectively fixed with a gear shaft 1 and a gear shaft 2, and a chain is meshed and connected between the gear shaft 1 and the gear shaft 2; A fixing plate is fixedly provided near the rear end of the top of the agricultural seeder frame, a supporting plate 1 is fixedly provided on the top of the fixing plate, a mounting plate is installed on the outer end of the supporting plate 1, an armrest is fixedly provided above the mounting plate, a handle is sleeved on the rear end of the armrest, and a crossbar is fixedly provided between the armrests; The drilling mechanism is fixedly arranged in the middle of the frame of the agricultural seeder. The seed placing mechanism is fixedly arranged near the front between the frames of the agricultural seeder, and the seed placing mechanism is located in front of the drilling mechanism; The soil covering mechanism is fixedly arranged between the frames of the agricultural seeder and near the rear, and the soil covering mechanism is located behind the drilling mechanism.

[0006] Preferably, a driving structure is provided below the front shaft rod, and the driving structure includes an extension rod, a driving motor 1, a driving shaft disk, a base and a driven shaft disk. The extension rod is fixedly arranged at the front end of the agricultural seeder frame, a vertical plate is fixedly arranged between the upper end of the extension rod and the front end of the agricultural seeder frame, the base is fixedly arranged at the inner end of the extension rod, a pad is fixedly arranged between the bottom of the driving motor 1 and the base, the output end of the driving motor 1 is connected to the driving shaft 1, the driving shaft disk is fixedly arranged at the outer end of the driving shaft 1, the outer end of the driving shaft disk is fixedly provided with an extension shaft, the outer end of the extension shaft is rotatably connected to the inner end of the vertical plate, and the driven shaft disk is fixedly arranged At one end of the front shaft rod, a transmission belt is sleeved between the driven shaft disk and the driving shaft disk; the driving structure realizes the electric drive of the seeder, which significantly improves the working efficiency and convenience of operation compared with the traditional manual or animal-powered driving methods. The driving motor directly drives the front shaft rod to rotate, thereby driving the whole machine forward. Not only is the power output stable, but the speed is also easy to control, which can adapt to the working needs of different terrains. The extension rod, the vertical plate and the base are used to extend the support driving structure to the front end of the agricultural seeder frame. The driving motor and the driving shaft are used to drive and control the driving shaft disk. The driving shaft disk is used to control the rotation of the driven shaft disk through the linkage of the transmission belt, and the extension shaft is used to extend and support the stable rotation of the driving shaft disk.

[0007] Preferably, the drilling mechanism includes a lining plate, an end plate, an electric push rod device 1, a connecting plate, a driving motor 2 and a drill rod, wherein the lining plate is fixedly arranged in the middle between the frames of the agricultural seeder, and one end of the bottom of the end plate is fixedly arranged on the top of the lining plate; the electric push rod device 1 is fixedly arranged on the top rear end of the end plate through a mounting frame, the output end of the electric push rod device 1 is connected to a push rod 1, and the bottom rear end of the connecting plate is fixedly arranged on the top of the push rod 1; the driving motor 2 is fixedly arranged on the front end of the connecting plate, and the output end of the driving motor 2 is connected to There is a driving shaft 2, the drill rod is fixed at the bottom of the driving shaft 2, the outside of the drill rod is fixedly provided with a spiral blade, and the bottom of the drill rod is fixedly provided with a drill bit; the lining plate and the end plate are used to support the overall drilling mechanism, the electric push rod device 1 and the push rod 1 are used to lift and adjust the height of the drill hole, which is convenient for directly extending into the soil, the driving motor 2 and the driving shaft 2 are used to directly control the rotation of the drill rod, the spiral blade not only helps to loosen the soil quickly, but also can mix the soil while drilling holes, providing a good growth environment for seeds, and the drill bit is a pointed structure for quickly and directly drilling into the soil.

[0008] Preferably, a hydraulic rod and a hydraulic cylinder are connected between the middle part of the bottom of the connecting plate and the end plate, a limiting hole 1 is provided in the middle of the end plate, the driving shaft 2 is connected through the inside of the limiting hole 1, limiting rod 1 is fixedly provided at both ends of the top of the end plate, a fixing plate is fixedly provided at the bottom of the driving motor 2, limiting holes 2 are provided at both ends of the fixing plate, and the limiting rod 1 is connected through the inside of the limiting hole 2; the hydraulic rod and the hydraulic cylinder are used for hydraulically assisted lifting and lowering adjustment of the connecting plate, the limiting hole 1 is used for limiting the up and down movement adjustment of the driving shaft 2, and the limiting hole 2 is used for limiting the up and down movement adjustment of the limiting rod 1.

[0009] Preferably, the seed placing mechanism includes a seed storage bin, a support plate, a support frame, a feed bin, a limiting bin, a feed pipe and an extended feed pipe, the seed storage bin is a structure with a larger top and a smaller bottom, the feed bin is fixedly arranged at the bottom of the seed storage bin, the limiting bin is a constricted structure fixedly arranged at the bottom of the feed bin, the feed pipe is fixedly arranged at the bottom of the limiting bin, and the extended feed pipe is slidably connected to the bottom of the feed pipe; the support frame is fixedly arranged at both side walls of the seed storage bin, the bottom of the support frame is fixedly provided with an adapter plate, the support plate is fixedly arranged at the bottom of the adapter plate, and the support plate is fixedly arranged at the upper end of the agricultural seeder frame; the seed storage bin with a structure with a larger top and a smaller bottom is designed for large capacity, which reduces the need for frequent feeding, the limiting bin with a constricted structure is used for slowly feeding and placing seeds in sequence, and the feed pipe and the extended feed pipe are used for accurately placing seeds into the drilled holes.

[0010] Preferably, a feed port is connected to the bottom of the seed storage bin, a rotating rod is rotatably connected to the inside of the feed port, a switching turntable is fixedly provided in the middle of the rotating rod, and a material storage trough is provided on the outer wall of the switching turntable, and a drive motor three is connected to the outer end of the feed port. The feed port is used to accurately store material in the material storage trough, and the drive motor three is used to drive and control the rotation of the rotating rod, and the rotating rod is used to drive the switching turntable to rotate. The switching turntable is used to rotate and switch different material storage troughs to correspond to the feed port, and the feed rate is adjusted according to needs to achieve sowing with different densities and spacings.

[0011] Preferably, a discharge head is fixedly provided at the bottom of the extended discharge tube, a limiting ring is fixedly provided at the upper end of the extended discharge tube, a retaining ring is fixedly provided at the bottom outer end of the lower feed tube, and the retaining ring is slidably connected to the inner side wall of the extended discharge tube; a limiting groove is provided on the outer side wall of the lower feed tube, an extended limiting rod is fixedly provided near the upper end of the outer side of the extended discharge tube, and the upper part of the extended limiting rod is slidably connected to the inside of the limiting groove; an extension plate 1 is fixedly provided on the outer side wall of the lower feed tube, an electric push rod device 2 is fixedly provided through the interior of the extension plate 1, a push rod 2 is connected to the bottom of the electric push rod device 2, and the bottom of the push rod 2 An extension plate 2 is fixedly provided on the part, and the extension plate 2 is fixedly provided on the lower end of the outer side wall of the extended discharge pipe; the discharge head realizes accurate seed delivery to avoid splashing, and the limit ring is used for limiting the baffle ring to prevent the discharge pipe from detaching from the upper end of the extended discharge pipe, and safely limiting the position. Multiple extended limit rods are used to limit the position to the internal auxiliary sliding adjustment of the limit groove, so that the extended discharge pipe is located outside the discharge pipe and slides more stably, the extension plate 1 is used to fix the electric push rod device 2 to the outer side wall of the discharge pipe, and the extension plate 2 is used to fix the push rod 2 to the outer side wall of the extended discharge pipe, and the electric push rod device 2 and the push rod 2 are used to telescopically adjust the position of the extended discharge pipe to realize its sliding adjustment.

[0012] Preferably, the soil covering mechanism includes a bracket, a support plate 2, an electric push rod device 3 and a column, the bracket is an inverted L-shaped plate structure fixedly arranged on the top near the rear of the agricultural seeder frame, the support plate 2 is fixedly arranged between the upper ends of the brackets, the electric push rod device 3 is fixedly arranged in the middle of the support plate 2, the bottom of the electric push rod device 3 is connected with a push rod 3, the column is installed at the bottom of the push rod 3, limit rods 2 are fixedly provided near the top of both sides of the column, a limit hole 3 is provided near the inner end of the support plate 2, the limit rod 2 is connected to the inside of the limit hole 3, the column is a column structure and a soil covering plate adjustment mechanism is provided at the outer end; the bracket and the support plate 2 are used to fix and support the electric push rod device 3, the electric push rod device 3 and the push rod 3 are used to control the lifting and lowering adjustment of the column and the soil covering plate adjustment mechanism, which is convenient for disassembly and maintenance, and the limit rod 2 is used to limit the sliding inside the limit hole 3, so that the lifting and lowering adjustment is more stable and the shaking coefficient is reduced.

[0013] Preferably, the covering plate adjustment mechanism includes a positioning plate, a movable shaft 1, a baffle, a covering plate, a positioning frame, an electric telescopic device, an axle seat and a movable shaft 2, the positioning plate is fixedly arranged near the bottom of the outer wall of the column, an adjustment groove is opened at the outer end of the positioning plate, support blocks are arranged at both ends of the adjustment groove, the movable shaft 1 is rotatably connected between the support blocks, the baffle is fixedly arranged at the bottom of the movable shaft 1, and the covering plate is fixedly arranged at the bottom of the baffle in an outward italic shape; the positioning frame is fixedly arranged in the middle of the outer wall of the column, the electric telescopic device is fixedly arranged through the lower end of the positioning frame, and the inner end of the electric telescopic device is connected with A telescopic column, wherein an axis plate is fixedly arranged at the inner end of the telescopic column, the movable axis 2 penetrates and is fixedly arranged inside the axis plate, the movable axis 2 is rotatably connected between the axis seats, and the axis seats are fixedly arranged on the outer side wall of the baffle; the positioning frame is used to fix and support the electric telescopic device downward, the electric telescopic device and the telescopic column are used to electrically control the inward and outward movement of the axis plate, the axis seat is used to rotatably support the movable axis 2, the movable axis 2 is used to fix the axis plate, the positioning plate is used to fix the support block, the support block is used to rotatably support the movable axis 1, the movable axis 1 is used to extend downward to fix the baffle and the covering plate, and the covering plate in an outward italic shape is used to concentrate the soil to the middle without damaging the seeds.

[0014] Compared with the prior art, the invention has the following beneficial effects: the front wheels and rear wheels are respectively installed at the front and rear ends of the agricultural seeder frame, thereby enhancing the passability and stability of the seeder in uneven farmland, and the set driving structure reduces manual intervention and improves the automation level; The drilling mechanism set in the middle of the agricultural seeder frame can accurately control the depth and position of the drilling hole to ensure that the seeds are accurately implanted in the soil. The drilling force can be adjusted according to different soil conditions, which increases the adaptability and flexibility of sowing. The seed placement mechanism is set near the front between the frames of the agricultural seeder to achieve precise control of the seed placement height and angle, improve the accuracy of seeding, help save seeds and increase crop yields; The soil covering mechanism is set near the rear between the frames of the agricultural seeder, so that the surrounding soil can be moved to the middle for covering directly after sowing, which can effectively cover the seeds and compact the soil, reduce water evaporation, improve the soil's ability to keep warm and retain moisture, adapt to different soil types and crop growth habits, and ensure that the seeds germinate in the most suitable environment; In line with the development trend of green agriculture, precision sowing and soil covering technology helps to save resources, reduce the use of chemical fertilizers and pesticides, and promote the sustainable development of agriculture. It enables it to operate in different types of farmland and provides strong support for the promotion of efficient and environmentally friendly agricultural technology. It not only greatly improves the efficiency and quality of agricultural production, but also makes positive contributions to promoting agricultural modernization and promoting sustainable development of agriculture. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall rear upper left perspective structure of the present invention; Figure 2 It is a schematic diagram of the overall rear lower right perspective structure of the present invention; Figure 3 It is a schematic diagram of the overall front upper left perspective structure of the present invention; Figure 4 It is a schematic diagram of the outer end structure of the driving mechanism of the agricultural seeder of the present invention; Figure 5 It is a schematic diagram of the partial structure of the inner end of the driving mechanism of the agricultural seed drill of the present invention; Figure 6 It is a schematic diagram of the overall structure of the drilling mechanism, seed placing mechanism and soil covering mechanism of the agricultural seeder of the present invention; Figure 7 It is a schematic diagram of the structure of the drilling mechanism of the present invention from an upper perspective; Figure 8 It is a schematic diagram of the structure of the drilling mechanism of the present invention from a bottom perspective; Fig. 9 It is a schematic diagram of the structure of the seed placing mechanism of the present invention from an upper perspective; Fig.10 It is a schematic diagram of the structure of the seed placing mechanism of the present invention from a bottom perspective; Fig.11 It is a schematic diagram of the overall structure of the extended discharge pipe of the present invention; Fig.12 It is a schematic diagram of the internal cross-sectional structure of the extended discharge pipe of the present invention; Fig.13 For the present invention Fig.12 The enlarged structural diagram at A in the middle; Fig.14 It is a schematic diagram of the internal structure of the lower bin of the present invention; Fig.15 It is a schematic diagram of the structure of the soil covering mechanism of the present invention from an upper perspective; Fig.16 It is a schematic diagram of the upper structure of the soil cover plate adjustment mechanism of the present invention; Fig.17 It is a schematic diagram of the structure of the soil covering mechanism of the present invention from the bottom perspective; Fig.18 For the present invention Fig.17 Enlarged structural diagram at B in the middle.

[0016] In the figure, 1, agricultural seed drill frame; 11, front wheel; 111, front axle; 112, gear shaft 1; 12, rear wheel; 121, rear axle; 122, gear shaft 2; 13, chain; 14, handrail; 141, handle; 142, cross bar; 143, mounting plate; 15, fixing plate; 151, support plate 1; 16, driving structure; 161, extension rod; 162, vertical plate; 163, driving motor 1; 1631, cushion block; 164, driving shaft disc; 165, base; 166, extension shaft; 167, driven shaft disc; 168, driving shaft 1; 2, drilling mechanism; 21, lining plate; 22, end plate; 221, limit hole 1; 23, electric push rod device 1; 231, push rod 1; 232, connecting plate; 24, driving motor 2; 241, fixing plate; 2411, limit hole 2; 242, driving shaft 2; 25, drill rod; 251, spiral blade; 252, drill bit; 26, limit rod 1; 27, hydraulic cylinder; 271, hydraulic rod; 3, seed placing mechanism; 31, seed storage bin; 311, unloading 32. Support plate; 321. Adapter plate; 322. Support frame; 33. Unloading bin; 331. Driving motor three; 332. Rotating rod; 333. Switching turntable; 3331. Storage trough; 34. Limiting bin; 35. Unloading pipe; 351. Limiting groove; 352. Stop ring; 36. Extended unloading pipe; 361. Unloading head; 362. Extended limiting rod; 363. Electric push rod device two; 3631. Push rod two; 3632. Extension plate one; 3633. Extension plate two; 364. Limiting ring; 4. Covering machine Structure; 41. bracket; 411. support plate 2; 4111. limit hole 3; 42. electric push rod device 3; 421. push rod 3; 43. column; 431. limit rod 2; 44. soil cover plate adjustment mechanism; 441. positioning plate; 4411. adjustment slot; 4412. support block; 4413. movable shaft 1; 442. baffle; 443. soil cover plate; 444. positioning frame; 445. electric telescopic device; 4451. telescopic column; 4452. shaft seat; 4453. shaft plate; 4454. movable shaft 2. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 18The embodiment of the present invention provides a technical solution: an agricultural seeder with a soil covering function, comprising an agricultural seeder frame 1, a drilling mechanism 2, a seed placing mechanism 3 and a soil covering mechanism 4, the front end of the agricultural seeder frame 1 extends upward and is rotatably connected to a front axle rod 111 through the middle, and front wheels 11 are installed at both ends of the front axle rod 111, the rear end of the agricultural seeder frame 1 is rotatably connected to a rear axle rod 121 through the middle, and rear wheels 12 are installed at both ends of the rear axle rod 121, and the diameter of the front wheel 11 is larger than that of the rear wheel 12. The front wheel 11 is a driving wheel with a larger diameter, which makes it more powerful to move forward, has a high stability coefficient, strong power, can better cross obstacles, reduce machine bumps, and ensure the continuity and accuracy of seeding operations. The side ends of the front axle rod 111 and the rear axle rod 121 are respectively fixed with a gear shaft 112 and a gear shaft 2 122. The gear shaft 112 and the gear shaft 2 122 are meshed and connected with a chain 13. The transmission connection through the chain 13 ensures the synchronous rotation of the front and rear wheels, and further improves the driving stability. A fixing plate 15 is fixedly provided near the rear end of the top of the agricultural seeding machine frame 1, a supporting plate 151 is fixedly provided on the top of the fixing plate 15, a mounting plate 143 is installed on the outer end of the supporting plate 151, an armrest frame 14 is fixedly provided above the mounting plate 143, a handle 141 is sleeved on the rear end of the armrest frame 14, and a cross bar 142 is fixedly provided between the armrest frames 14, which enhances the stability of the overall structure, provides solid support for seeding operations, and facilitates the hand-held handle 141 to push and move; The drilling mechanism 2 is fixedly arranged in the middle of the agricultural seed drill frame 1; The seed placing mechanism 3 is fixedly arranged near the front between the frames 1 of the agricultural seeder, and the seed placing mechanism 3 is located in front of the drilling mechanism 2; The soil covering mechanism 4 is fixedly arranged near the rear between the frames 1 of the agricultural seed drill, and the soil covering mechanism 4 is located behind the drilling mechanism 2 .

[0019] The front wheels 11 and the rear wheels 12 are respectively installed at the front and rear ends of the agricultural seeder frame 1, thereby enhancing the passability and stability of the seeder in uneven farmland, and the drive structure 16 is provided to reduce manual intervention and improve the automation level; By setting a drilling mechanism 2 in the middle of the agricultural seeding machine frame 1, the depth and position of the drilling hole can be accurately controlled to ensure that the seeds are accurately implanted in the soil. The drilling force can be adjusted according to different soil conditions, which increases the adaptability and flexibility of seeding. By setting the seed placing mechanism 3 near the front between the frames 1 of the agricultural seeding machine, the precision control of the seed placing height and angle is realized, the accuracy of seeding is improved, which helps to save seeds and increase crop yields; By setting the soil covering mechanism 4 near the rear between the frames 1 of the agricultural seeder, it is convenient to directly move the surrounding soil to the middle for covering after sowing, which can effectively cover the seeds and compact the soil, reduce water evaporation, improve the soil's heat preservation and moisture retention capacity, adapt to different soil types and crop growth habits, and ensure that the seeds germinate in the most suitable environment; In line with the development trend of green agriculture, precision sowing and soil covering technology helps to save resources, reduce the use of chemical fertilizers and pesticides, and promote the sustainable development of agriculture. It enables it to operate in different types of farmland and provides strong support for the promotion of efficient and environmentally friendly agricultural technology. It not only greatly improves the efficiency and quality of agricultural production, but also makes positive contributions to promoting agricultural modernization and promoting sustainable development of agriculture.

[0020] Further improved, a driving structure 16 is provided below the front shaft rod 111, and the driving structure 16 includes an extension rod 161, a driving motor 163, a driving shaft disc 164, a base 165 and a driven shaft disc 167. The extension rod 161 is fixedly arranged at the front end of the agricultural seeder frame 1, and a vertical plate 162 is fixedly arranged between the upper end of the extension rod 161 and the front end of the agricultural seeder frame 1, and the base 165 is fixedly arranged at the inner side end of the extension rod 161, and the driving motor 163 is fixedly arranged at the inner side end of the extension rod 161. A cushion block 1631 is fixedly provided between the bottom and the base 165, a driving shaft 168 is connected to the output end of the driving motor 163, a driving shaft disc 164 is fixedly provided at the outer end of the driving shaft 168, an extension shaft 166 is fixedly provided at the outer end of the driving shaft disc 164, and the outer end of the extension shaft 166 is rotatably connected to the inner end of the vertical plate 162, a driven shaft disc 167 is fixedly provided at one end of the front shaft rod 111, and a transmission belt is sleeved between the driven shaft disc 167 and the driving shaft disc 164; The driving structure 16 realizes the electric drive of the seeder, which significantly improves the working efficiency and convenience of operation compared with the traditional manual or animal-powered driving methods. The driving motor 163 directly drives the front shaft rod 111 to rotate, thereby driving the whole machine forward. Not only is the power output stable, but it is also easy to control the speed to adapt to the working needs of different terrains. The extension rod 161, the vertical plate 162 and the base 165 are used to extend the support driving structure 16 to the front end of the agricultural seeder frame 1. The driving motor 163 and the driving shaft 168 are used to drive and control the driving shaft disc 164. The driving shaft disc 164 is used to control the rotation of the driven shaft disc 167 through the linkage of the transmission belt. The extension shaft 166 is used to extend and support the stable rotation of the driving shaft disc 164.

[0021] Further improved, the drilling mechanism 2 includes a lining plate 21, an end plate 22, an electric push rod device 1 23, a connecting plate 232, a driving motor 24 and a drilling rod 25, the lining plate 21 is fixedly arranged in the middle between the agricultural seeding machine frames 1, and one end of the bottom of the end plate 22 is fixedly arranged on the top of the lining plate 21; The electric push rod device 23 is fixed to the top rear end of the end plate 22 through a mounting frame, the output end of the electric push rod device 23 is connected to a push rod 231, and the bottom rear end of the connecting plate 232 is fixed to the top of the push rod 231; The second driving motor 24 is fixedly arranged at the front end of the connecting plate 232, the output end of the second driving motor 24 is connected to the second driving shaft 242, the drill rod 25 is fixedly arranged at the bottom of the second driving shaft 242, the outside of the drill rod 25 is fixedly provided with a spiral blade 251, and the bottom of the drill rod 25 is fixedly provided with a drill bit 252; The lining plate 21 and the end plate 22 are used to support the overall drilling mechanism 2, the electric push rod device 23 and the push rod 231 are used to lift and adjust the height of the drilling hole, which is convenient for directly extending into the soil, the driving motor 24 and the driving shaft 242 are used to directly control the rotation of the drill rod 25, the spiral blades 251 not only help to loosen the soil quickly, but also can mix the soil while drilling holes, providing a good growth environment for seeds, and the drill bit 252 is a pointed structure for quickly and directly drilling into the soil.

[0022] Further improved, a hydraulic rod 271 and a hydraulic cylinder 27 are connected between the middle of the bottom of the connecting plate 232 and the end plate 22, a limiting hole 221 is provided in the middle of the end plate 22, a second drive shaft 242 is connected to the inside of the limiting hole 221, a limiting rod 26 is fixed at both ends of the top of the end plate 22, a fixing plate 241 is fixed at the bottom of the driving motor 24, a limiting hole 2411 is provided at both ends of the fixing plate 241, and a limiting rod 26 is connected to the inside of the limiting hole 2411; The hydraulic rod 271 and the hydraulic cylinder 27 are used for hydraulically assisting the lifting and lowering adjustment of the connecting plate 232, the limiting hole 1 221 is used for limiting the upward and downward movement adjustment of the driving shaft 2 242, and the limiting hole 2411 is used for limiting the upward and downward movement adjustment of the limiting rod 1 26.

[0023] Further improved, the seed placing mechanism 3 includes a seed storage bin 31, a support plate 32, a support frame 322, a feed bin 33, a feed limit bin 34, a feed pipe 35 and an extended feed pipe 36. The seed storage bin 31 is a structure with a large top and a small bottom. The feed bin 33 is fixedly arranged at the bottom of the seed storage bin 31. The feed limit bin 34 is a constricted structure fixedly arranged at the bottom of the feed bin 33. The feed pipe 35 is fixedly arranged at the bottom of the feed limit bin 34. The extended feed pipe 36 is slidably connected to the bottom of the feed pipe 35. The support frame 322 is fixedly arranged on the two side walls of the seed storage bin 31, the bottom of the support frame 322 is fixedly arranged with an adapter plate 321, the support plate 32 is fixedly arranged on the bottom of the adapter plate 321, and the support plate 32 is fixedly arranged on the upper end of the agricultural seed drill frame 1; The seed storage bin 31 with a large upper and small lower structure is designed for large capacity, reducing the need for frequent feeding. The limiting bin 34 with a constricted structure is used for slowly feeding and placing seeds in sequence. The feeding pipe 35 and the extended feeding pipe 36 are used for accurately placing seeds into the drilled holes.

[0024] Further improved, the bottom of the seed storage bin 31 is connected with a feed opening 311, the interior of the feed bin 33 is rotatably connected with a rotating rod 332, a switching turntable 333 is fixedly provided in the middle of the rotating rod 332, and a material storage groove 3331 is provided on the outer wall of the switching turntable 333, and the outer end of the rotating rod 332 is penetrated and connected with a driving motor 331, and the driving motor 331 is fixedly provided at the outer end of the feed bin 33; The discharge port 311 is used to accurately store materials in the storage trough 3331, and the driving motor 331 is used to drive the rotating rod 332 to rotate, and the rotating rod 332 is used to drive the switching turntable 333 to rotate. The switching turntable 333 is used to rotate and switch different storage troughs 3331 to correspond to the discharge port 311, and adjust the discharge rate as needed to achieve sowing with different densities and spacings.

[0025] As a further improvement, a discharge head 361 is fixedly provided at the bottom of the extended discharge pipe 36, a limit ring 364 is fixedly provided at the upper end of the extended discharge pipe 36, and a retaining ring 352 is fixedly provided at the outer end of the bottom of the discharge pipe 35, and the retaining ring 352 is slidably connected to the inner side wall of the extended discharge pipe 36; The outer wall of the material discharge pipe 35 is provided with a limit groove 351, and an extension limit rod 362 is fixedly provided near the upper end of the outer side of the extended material discharge pipe 36, and the upper part of the extended limit rod 362 is slidably connected to the inner part of the limit groove 351; An extension plate 1 3632 is fixedly provided on the outer side wall of the discharge pipe 35, and an electric push rod device 2 363 is fixedly provided inside the extension plate 1 3632, and a push rod 2 3631 is connected to the bottom of the electric push rod device 2 363, and an extension plate 2 3633 is fixedly provided on the bottom of the push rod 2 3631, and the extension plate 2 3633 is fixedly provided on the lower end of the outer side wall of the extended discharge pipe 36; The discharge head 361 realizes precise seed delivery to avoid splashing, the limit ring 364 is used to limit the baffle ring 352 to prevent the discharge tube 35 from detaching from the upper end of the extended discharge tube 36, and safely limit the position, and multiple extended limit rods 362 are used to limit to the internal auxiliary sliding adjustment of the limit groove 351, so that the extended discharge tube 36 is located outside the discharge tube 35 and slides more stably, the extension plate 1 3632 is used to fix the electric push rod device 2 363 to the outer wall of the discharge tube 35, the extension plate 2 3633 is used to fix the push rod 2 3631 to the outer wall of the extended discharge tube 36, the electric push rod device 2 363 and the push rod 2 3631 are used to telescopically adjust the position of the extended discharge tube 36 to realize its sliding adjustment.

[0026] Further improved, the soil covering mechanism 4 includes a bracket 41, a second support plate 411, a third electric push rod device 42 and a column 43, the bracket 41 is an inverted L-shaped plate structure fixedly arranged at the top of the agricultural seeding machine frame 1 near the rear, the second support plate 411 is fixedly arranged between the upper ends of the bracket 41, the third electric push rod device 42 is fixedly arranged in the middle of the second support plate 411, the bottom of the third electric push rod device 42 is connected with a push rod 421, the column 43 is installed at the bottom of the push rod 421, and the two sides of the column 43 are fixedly provided with a limit rod 431 near the top, the support plate 411 is provided with a limit hole 4111 near the inner end, the limit rod 431 is connected to the inside of the limit hole 4111, and the column 43 is a column structure and a soil covering plate adjustment mechanism 44 is provided at the outer end; The bracket 41 and the support plate 2 411 are used to fix and support the electric push rod device 3 42. The electric push rod device 3 42 and the push rod 3 421 are used to control the lifting and lowering adjustment of the column 43 and the covering plate adjustment mechanism 44, which is convenient for disassembly and maintenance. The limit rod 2 431 is used to limit the sliding inside the limit hole 3 4111, so that the lifting and lowering adjustment is more stable and the shaking coefficient is reduced.

[0027] Specifically, the cover plate adjustment mechanism 44 includes a positioning plate 441, a movable shaft 1 4413, a baffle 442, a cover plate 443, a positioning frame 444, an electric telescopic device 445, an axle seat 4452 and a movable shaft 2 4454. The positioning plate 441 is fixedly arranged near the bottom of the outer wall of the column 43, and an adjustment groove 4411 is provided at the outer end of the positioning plate 441. Support blocks 4412 are provided at both ends of the adjustment groove 4411. The movable shaft 1 4413 is rotatably connected between the support blocks 4412. The baffle 442 is fixedly arranged at the bottom of the movable shaft 1 4413, and the cover plate 443 is fixedly arranged at the bottom of the baffle 442 in an outward italic shape; The positioning frame 444 is fixedly arranged at the middle of the outer wall of the column 43, the electric telescopic device 445 is fixedly arranged at the lower end of the positioning frame 444, the inner end of the electric telescopic device 445 is connected with the telescopic column 4451, the inner end of the telescopic column 4451 is fixedly arranged with an axis plate 4453, the movable shaft 4454 is fixedly arranged inside the axis plate 4453, the movable shaft 4454 is rotatably connected between the axis seats 4452, and the axis seats 4452 are fixedly arranged on the outer wall of the baffle 442; The positioning frame 444 is used to fix and support the electric telescopic device 445 downward. The electric telescopic device 445 and the telescopic column 4451 are used to electrically control the inward and outward movement of the shaft plate 4453. The shaft seat 4452 is used to rotationally support the movable shaft two 4454. The movable shaft two 4454 is used to fix the shaft plate 4453. The positioning plate 441 is used to fix the support block 4412. The support block 4412 is used to rotationally support the movable shaft one 4413. The movable shaft one 4413 is used to extend downward to fix the baffle 442 and the covering plate 443. The covering plate 443 with an outward italic shape is used to concentrate the soil to the middle without damaging the seeds.

[0028] Working principle: The hand-held handle 141 pushes the agricultural seed drill frame 1 through the handrail frame 14, and at the same time starts the driving motor 163 of the driving structure 16, automatically controls the driving shaft 168 and the driving shaft disc 164 to rotate, and the driving shaft disc 164 drives the driven shaft disc 167 to rotate through the transmission belt, thereby driving the front shaft rod 111 to move the front wheel 11, and at the same time, the gear shaft 112 drives the gear shaft 2 122 to rotate through the chain 13, so that the rear shaft rod 121 and the rear wheel 12 rotate and move in the farmland; The electric push rod device 1 23 of the drilling mechanism 2 is started to automatically control the push rod 1 231 to rise and fall, and the driving motor 2 24 is driven to rise and fall as a whole through the connecting plate 232, and the hydraulic cylinder 27 and the hydraulic rod 271 assist in the lifting and falling adjustment, and then the driving motor 2 24 is started to automatically control the driving shaft 242 to rotate, and the drilling rod 25, the spiral blade 251 and the drill bit 252 are driven to drill into the soil to form a hole; The agricultural seeds are stored in the seed storage bin 31, and the driving motor 331 is started to automatically control the rotating rod 332 to drive the switching turntable 333 to rotate, so that the multiple storage grooves 3331 on the outer wall of the switching turntable 333 correspond to the discharge port 311, so that the seeds are stored in the storage grooves 3331, so that the seeds fall into the limiting bin 34 and the discharge pipe 35, and the speed and frequency of the discharge can be controlled according to the sowing quantity. Immediately start the electric push rod device 2 363 to automatically control the telescopic adjustment of the push rod 2 3631, driving the extended discharge pipe 36 located outside the discharge pipe 35 to extend and slide downward, so that the discharge head 361 extends to the hole accurately to release the seeds; After moving forward, the soil covering mechanism 4 is located above the hole, and the electric push rod device 3 42 of the soil covering mechanism 4 is continuously started to automatically control the push rod 3 421 to rise and fall, driving the column 43 to rise and fall, so that the soil covering plate adjustment mechanism 44 contacts the ground; Then start the electric telescopic device 445 to automatically control the telescopic adjustment of the telescopic column 4451, so that the shaft plate 4453 is located between the shaft seats 4452 and the movable axis 2 4454 is movable and adjusted, which drives the baffle 442 and the covering plate 443 to be located between the support blocks 4412 and below the movable axis 1 4413. The covering plate 443 then moves the soil around the hole toward the seeds to cover them, thereby reducing water evaporation, improving the soil's ability to keep warm and retain moisture, adapting to different soil types and crop growth habits, ensuring that the seeds germinate in the most suitable environment, and repeating the sowing construction cycle.

[0029] The agricultural seeding machine frame 1 of the present invention, the front wheel 11, the front shaft rod 111, the gear shaft 112, the rear wheel 12, the rear shaft rod 121, the gear shaft 2 122, the chain 13, the handrail frame 14, the handle 141, the cross bar 142, the mounting plate 143, the fixing plate 15, the support plate 151, the driving structure 16, the extension rod 161, the vertical plate 162, the driving motor 163, the cushion block 1631, the driving shaft disk 164, the base 165, the extension shaft 166, the driven shaft disk 167, the driving shaft 168, the drilling mechanism 2, the lining plate 21, the end plate 22, the limiting hole 121, the electric push rod device 123, the push rod 1231, the connecting plate 232, the driving motor 24, the fixing plate 241, the limiting hole 2411, the driving shaft 2 42. Drill rod 25. Spiral blade 251. Drill bit 252. Limit rod 1 26. Hydraulic cylinder 27. Hydraulic rod 271. Seed placing mechanism 3. Seed storage bin 31. Feeding port 311. Support plate 32. Adapter plate 321. Support frame 322. Feeding bin 33. Driving motor 3 331. Rotating rod 332. Switching turntable 333. Storage trough 3331. Limiting bin 34. Feeding pipe 35. Limiting groove 351. Blocking ring 352. Extended feeding pipe 36. Feeding head 361. Extended limiting rod 362. Electric push rod device 2 363. Push rod 2 3631. Extension plate 1 3632. Extension plate 2 3633. Limiting ring 364. Soil covering mechanism 4. Bracket 41. Support plate 2 411. Limiting hole 3 4111. Electric push rod device 3 42. Push rod three 421, column 43, limit rod two 431, covering plate adjustment mechanism 44, positioning plate 441, adjustment slot 4411, support block 4412, movable shaft one 4413, baffle 442, covering plate 443, positioning frame 444, electric telescopic device 445, telescopic column 4451, shaft seat 4452, shaft plate 4453, movable shaft two 4454, all components are universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods. The problem solved by the present invention is that manual covering is time-consuming and labor-intensive, increases work intensity, affects the convenience of use of agricultural seeders, is easily blocked by soil, and seeds cannot be sown into the land, affecting the sowing efficiency of the seeder The present invention combines the above components with each other, and respectively installs the front wheel 11 and the rear wheel 12 at the front and rear ends of the agricultural seeder frame 1, thereby enhancing the passability and stability of the seeder in uneven farmland, and reduces manual intervention through the arranged driving structure 16, thereby improving the automation level; through the drilling mechanism 2 arranged in the middle of the agricultural seeder frame 1, the depth and position of the drill hole can be accurately controlled to ensure that the seeds are accurately implanted in the soil, and the drilling force can be adjusted according to different soil conditions, thereby increasing the adaptability and flexibility of sowing; through the seed placing mechanism 3 arranged near the front between the agricultural seeder frames 1, the precision control of the seed placing height and angle is realized, thereby improving the accuracy of sowing, and helping to save seeds and increase crop yields;The soil covering mechanism 4 is arranged near the rear of the agricultural seeding machine frame 1, so that the surrounding soil can be directly moved to the middle for covering after sowing, which can effectively cover the seeds and compact the soil, reduce water evaporation, improve the soil's ability to keep warm and retain moisture, adapt to different soil types and crop growth habits, and ensure that the seeds germinate in the most suitable environment. ;

[0030] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An agricultural seeder with a soil covering function, comprising an agricultural seeder frame (1), a hole drilling mechanism (2), a seed placing mechanism (3) and a soil covering mechanism (4), characterized in that: The front end of the agricultural seed drill frame (1) extends upward and a front axle rod (111) is rotatably connected to the frame through the middle thereof; front wheels (11) are mounted at both ends of the front axle rod (111); a rear axle rod (121) is rotatably connected to the frame through the middle of the rear end thereof; rear wheels (12) are mounted at both ends of the rear axle rod (121); the diameter of the front wheel (11) is greater than the diameter of the rear wheel (12); a gear shaft 1 (112) and a gear shaft 2 (122) are fixedly mounted on the side ends of the front axle rod (111) and the rear axle rod (121), respectively; a chain (13) is meshedly connected between the gear shaft 1 (112) and the gear shaft 2 (122); A fixing plate (15) is fixedly provided on the top of the agricultural seeding machine frame (1) near the rear end, a support plate (151) is fixedly provided on the top of the fixing plate (15), a mounting plate (143) is mounted on the outer end of the support plate (151), a handrail (14) is fixedly provided above the mounting plate (143), a handle (141) is sleeved on the rear end of the handrail (14), and a crossbar (142) is fixedly provided between the handrails (14); The drilling mechanism (2) is fixedly arranged in the middle of the agricultural seed drill frame (1); The seed placing mechanism (3) is fixedly arranged near the front between the frames (1) of the agricultural seeding machine, and the seed placing mechanism (3) is located in front of the drilling mechanism (2); The soil covering mechanism (4) is fixedly arranged between the frames (1) of the agricultural seed drill and near the rear, and the soil covering mechanism (4) is located behind the drilling mechanism (2).

2. The agricultural seeder with soil covering function according to claim 1, characterized in that: A driving structure (16) is provided below the front shaft rod (111), and the driving structure (16) comprises an extension rod (161), a driving motor (163), a driving shaft disc (164), a base (165), and a driven shaft disc (167). The extension rod (161) is fixedly arranged at the front end of the agricultural seed drill frame (1), a vertical plate (162) is fixedly arranged between the upper end of the extension rod (161) and the front end of the agricultural seed drill frame (1), the base (165) is fixedly arranged at the inner side end of the extension rod (161), and the driving motor (163) is fixedly arranged at the inner side end of the extension rod (161). A cushion block (1631) is fixedly provided between the bottom and the base (165); the output end of the driving motor (163) is connected to a driving shaft (168); the driving shaft disc (164) is fixedly provided on the outer end of the driving shaft (168); an extension shaft (166) is fixedly provided on the outer end of the driving shaft disc (164); the outer end of the extension shaft (166) is rotatably connected to the inner end of the vertical plate (162); the driven shaft disc (167) is fixedly provided on one end of the front shaft rod (111); and a transmission belt is sleeved between the driven shaft disc (167) and the driving shaft disc (164).

3. The agricultural seeder with soil covering function according to claim 1, characterized in that: The drilling mechanism (2) comprises a lining plate (21), an end plate (22), an electric push rod device (23), a connecting plate (232), a second drive motor (24) and a drilling rod (25); the lining plate (21) is fixedly arranged in the middle between the frames (1) of the agricultural seed drill, and one end of the bottom of the end plate (22) is fixedly arranged on the top of the lining plate (21); The electric push rod device 1 (23) is fixed to the top rear end of the end plate (22) via a mounting frame, the output end of the electric push rod device 1 (23) is connected to a push rod 1 (231), and the bottom rear end of the connecting plate (232) is fixed to the top of the push rod 1 (231); The second drive motor (24) is fixedly arranged at the front end of the connecting plate (232); the output end of the second drive motor (24) is connected to the second drive shaft (242); the drill rod (25) is fixedly arranged at the bottom of the second drive shaft (242); a spiral blade (251) is fixedly arranged on the outside of the drill rod (25); and a drill bit (252) is fixedly arranged at the bottom of the drill rod (25).

4. The agricultural seeder with soil covering function according to claim 3, characterized in that: A hydraulic rod (271) and a hydraulic cylinder (27) are connected between the middle of the bottom of the connecting plate (232) and the end plate (22); a limiting hole (221) is provided in the middle of the end plate (22); the second drive shaft (242) is connected to the inside of the limiting hole (221); limiting rods (26) are fixedly provided at both ends of the top of the end plate (22); a fixing plate (241) is fixedly provided at the bottom of the second drive motor (24); limiting holes (2411) are provided at both ends of the fixing plate (241); and the limiting rods (26) are connected to the inside of the limiting hole (2411).

5. The agricultural seeder with soil covering function according to claim 1, characterized in that: The seed placing mechanism (3) comprises a seed storage bin (31), a support plate (32), a support frame (322), a feed bin (33), a feed limit bin (34), a feed pipe (35) and an extended feed pipe (36); the seed storage bin (31) is a structure with a large top and a small bottom; the feed bin (33) is fixedly arranged at the bottom of the seed storage bin (31); the feed limit bin (34) is a constricted structure fixedly arranged at the bottom of the feed bin (33); the feed pipe (35) is fixedly arranged at the bottom of the feed limit bin (34); and the extended feed pipe (36) is slidably connected to the bottom of the feed pipe (35); The support frame (322) is fixedly arranged on two side walls of the seed storage bin (31), an adapter plate (321) is fixedly arranged on the bottom of the support frame (322), the support plate (32) is fixedly arranged on the bottom of the adapter plate (321), and the support plate (32) is fixedly arranged on the upper end of the agricultural seed drill frame (1).

6. The agricultural seeder with soil covering function according to claim 5, characterized in that: The bottom of the seed storage bin (31) is connected to a feed opening (311), the interior of the feed bin (33) is rotatably connected to a rotating rod (332), a switching turntable (333) is fixedly provided in the middle of the rotating rod (332), a material storage groove (3331) is provided on the outer side wall of the switching turntable (333), the outer end of the rotating rod (332) is penetrated and connected to a driving motor three (331), and the driving motor three (331) is fixedly provided at the outer side end of the feed bin (33).

7. The agricultural seeder with soil covering function according to claim 6, characterized in that: A discharge head (361) is fixedly provided at the bottom of the extended discharge pipe (36), a limit ring (364) is fixedly provided at the upper end of the extended discharge pipe (36), and a retaining ring (352) is fixedly provided at the outer end of the bottom of the discharge pipe (35), and the retaining ring (352) is slidably connected to the inner side wall of the extended discharge pipe (36); The outer wall of the discharge pipe (35) is provided with a limit groove (351), and an extension limit rod (362) is fixedly distributed near the upper end of the outer side of the extension discharge pipe (36), and the upper part of the extension limit rod (362) is slidably connected to the inside of the limit groove (351); An extension plate 1 (3632) is fixedly provided on the outer wall of the discharge pipe (35), and an electric push rod device 2 (363) is fixedly provided inside the extension plate 1 (3632), and the bottom of the electric push rod device 2 (363) is connected to a push rod 2 (3631), and an extension plate 2 (3633) is fixedly provided on the bottom of the push rod 2 (3631), and the extension plate 2 (3633) is fixedly provided at the lower end of the outer wall of the extended discharge pipe (36).

8. The agricultural seeder with soil covering function according to claim 1, characterized in that: The soil covering mechanism (4) comprises a bracket (41), a second support plate (411), a third electric push rod device (42) and a column (43); the bracket (41) is an inverted L-shaped plate structure fixedly arranged near the top rear of the agricultural seed drill frame (1); the second support plate (411) is fixedly arranged between the upper ends of the bracket (41); the third electric push rod device (42) is fixedly arranged in the middle of the second support plate (411); and the third electric push rod device (43) is fixedly arranged at the middle of the second support plate (411). 2) is connected to a push rod three (421) at the bottom, the column (43) is installed at the bottom of the push rod three (421), and two limit rods (431) are fixedly provided near the top of both sides of the column (43), and a limit hole three (4111) is provided near the inner end of the support plate two (411), and the limit rod two (431) passes through and is connected to the inside of the limit hole three (4111), and the column (43) is a columnar structure and a covering plate adjustment mechanism (44) is provided at the outer end.

9. The agricultural seeder with soil covering function according to claim 8, characterized in that: The soil covering plate adjustment mechanism (44) comprises a positioning plate (441), a movable shaft 1 (4413), a baffle (442), a soil covering plate (443), a positioning frame (444), an electric telescopic device (445), an axle seat (4452) and a movable shaft 2 (4454); the positioning plate (441) is fixedly arranged at the lower part of the outer wall of the column (43); an adjustment groove (4411) is formed at the outer end of the positioning plate (441); support blocks (4412) are provided at both ends of the adjustment groove (4411); the movable shaft 1 (4413) is rotatably connected between the support blocks (4412); the baffle (442) is fixedly arranged at the bottom of the movable shaft 1 (4413); and the soil covering plate (443) is fixedly arranged at the bottom of the baffle (442) in an outward italic shape; The positioning frame (444) is fixedly arranged at the middle of the outer wall of the column (43), the electric telescopic device (445) is fixedly arranged at the lower end of the positioning frame (444), the inner end of the electric telescopic device (445) is connected to a telescopic column (4451), the inner end of the telescopic column (4451) is fixedly provided with an axis plate (4453), the movable shaft 2 (4454) is fixedly arranged inside the axis plate (4453), the movable shaft 2 (4454) is rotatably connected between the axis seats (4452), and the axis seats (4452) are fixedly arranged on the outer wall of the baffle (442).

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