A synchronous soil-covering rice direct seeding machine

Abstract

A synchronous soil-covering rice direct seeding machine comprises a high-speed riding power machine, a lifting mechanism, a sowing system, a soil-covering mechanism and a transmission system, wherein the high-speed riding power machine is hinged to the lifting mechanism, the lifting mechanism is fixedly hinged to the sowing system, the soil-covering mechanism is installed at the rear end of the sowing system, the high-speed riding power output shaft of the high-speed riding power machine is connected to the transmission system, the transmission system provides power to a seeding device in the sowing system and a soil-covering device driving main shaft in the soil-covering mechanism through an active double-row sprocket, and synchronous soil-covering is achieved on the basis of furrowing and ridge sowing through the composite transmission of the sprocket and the bevel gear, so that the soil on both sides of the sowing furrow is scraped to the bottom of the sowing furrow to cover the rice seeds, and the machine has the characteristics of low leakage rate, stable soil-covering thickness, no disturbance in the soil-covering process, etc., and has a reasonable structure and strong practicality.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural mechanized direct seeding of rice with soil covering, in particular to a synchronous soil covering direct seeding machine for rice. Background Art

[0002] With the transfer of rural labor and the rapid development of agricultural machinery, mechanical direct seeding of rice is increasingly popular among farmers because it can save the steps of raising seedlings and transplanting, and has the advantages of high operating efficiency, cost saving and labor saving. At present, rice seeds are mostly sown on the mud surface by mechanical direct seeding of rice, which is easily affected by bird damage, rodent damage, rain erosion, sun exposure, low temperature and other factors, and it is difficult to ensure full seedlings, especially in double-season rice areas, where early rice is easily affected by late spring cold, and it is even more difficult to ensure the emergence rate. Therefore, it is of great practical significance to study the soil covering sowing technology and equipment to solve a series of problems caused by seeds exposed on the mud surface to ensure the emergence rate of direct seeding of rice.

[0003] At present, the development of paddy field direct seeding and soil covering machinery in my country is relatively lagging behind. For example, the invention patent authorization publication number: CN106489365 A proposes a suspended soil covering device, which covers the seeds with soil by driving the vertical pendulum through a disc; the utility model authorization publication number: 208685722 U proposes a mechanical soil covering device for direct seeding of rice, which covers the rice seeds with soil by driving the horizontal pendulum through a disc and cooperating with a broom head; the above two soil covering devices have not been applied to actual field sowing. Therefore, it is of great practical significance to develop a rice direct seeding machine that can achieve synchronous sowing and soil covering to solve the adverse effects caused by the exposed mud surface of rice seeds after mechanical direct seeding of rice, which is of great practical significance to promote the widespread application of direct seeding technology of rice. Summary of the invention

[0004] The technical problem solved by the present invention is to provide a synchronous soil-covering rice direct seeding machine to solve the problems in the above-mentioned background technology.

[0005] The technical problem solved by the present invention is achieved by adopting the following technical solutions:

[0006] A synchronous soil-covering rice direct seeding machine comprises a high-speed riding power machine, a lifting mechanism, a sowing system, a soil-covering mechanism and a transmission system for transmission, wherein the high-speed riding power machine is hinged to the lifting mechanism, the lifting mechanism is fixedly hinged to the sowing system, the soil-covering mechanism is installed at the rear end of the sowing system, and the transmission system is connected to the sowing system and the soil-covering mechanism; the specific structures of each part are as follows:

[0007] The sowing system comprises a main support frame, a seeding device, a pipe beam group, a furrowing and ridging device, a water storage furrow opener, a sowing furrow opener and a soil covering plate. One end of the main support frame is hinged with a lifting mechanism, and the other end of the main support frame is fixedly installed with a pipe beam group. The seeding device is fixedly connected to the pipe beam group in rows with equal spacing. The furrowing and ridging device is arranged on the pipe beam group, and a water storage furrow opener for opening a water storage furrow and a sowing furrow opener for opening a sowing furrow are installed on the furrowing and ridging device. The furrowing and ridging device opens a water storage furrow and a sowing furrow on the mud surface. The water storage furrow is used to store water and drain open water in the field, and rice seeds are sown in the sowing furrow. The soil covering plate is arranged above the sowing furrow opened by the sowing furrow opener.

[0008] The soil covering mechanism includes a soil covering device, a mounting crossbeam for mounting the soil covering device, and a crossbeam hanging device, wherein one end of the crossbeam hanging device is embedded in the pipe beam group of the seeding system, the other end of the crossbeam hanging device is fixedly connected to the mounting crossbeam, and the soil covering device is fixed on the mounting crossbeam;

[0009] The crossbeam hanging device includes a main frame formed by positioning and welding a hanging side plate, an upper reinforcing plate, a lower reinforcing plate and a rear reinforcing plate, and the hanging side plate is provided with a pipe sleeve hole for installing two sets of pipe sleeves, an adjusting nut hole for adjusting the seeding device, a covering driving spindle hole for installing a driving covering device, a crossbeam hanging groove, a crossbeam installation groove and a plurality of positioning card grooves. The sowing amount of the seeding device installed on both sides of the sowing system is adjusted through the seeding device adjusting nut hole, and the two sets of pipe sleeves are respectively passed through the pipe sleeve holes and welded flush with the left and right end surfaces of the main frame;

[0010] The installation beam comprises a beam sealing plate, a lower installation beam and an upper installation beam, wherein the upper installation beam and the lower installation beam are respectively provided with soil covering device installation holes, the beam sealing plate is welded to both ends of the upper installation beam and the lower installation beam, and the upper installation beam is hung in the beam hanging groove of the beam hanging device, and the lower installation beam is nested in the beam installation groove of the beam hanging device;

[0011] In the transmission system, the front end of the telescopic transmission shaft is connected with the high-speed riding power output shaft of the high-speed riding power machine, the rear end of the telescopic transmission shaft is connected with the gearbox power input shaft of the gearbox, the gearbox power output shaft is connected with the active double-row sprocket by a key, the gearbox is fixed on the main support frame, and the power is converted into a horizontal direction through the bevel gear in the gearbox, the active double-row sprocket is connected with the square shaft driven sprocket, the square shaft driven sprocket is connected with the hexagonal shaft of the seeding device through a key, the square shaft driven sprocket drives the seeding device to operate through the hexagonal shaft of the seeding device, the active double-row sprocket is connected with the driven sprocket, the driven sprocket and the active sprocket are welded to the shaft sleeve transmission device, the shaft sleeve transmission device is fixedly nested on the pipe beam group, the active sprocket is connected with the bevel gear driven sprocket, the bevel gear driven sprocket is connected with the driving spindle of the covering device through a key, the active bevel gear is connected with the driving spindle of the covering device through a key, the driven bevel gear is connected with the power input shaft of the covering device through a key, and the power reversing is realized by the meshing of the bevel gears to drive the covering device to operate.

[0012] In the present invention, the pipe beam group includes pipe beam No. 1 and pipe beam No. 2, and the seeding devices are fixedly connected to pipe beam No. 1 and pipe beam No. 2 in rows with equal spacing; one end of the furrowing and ridging device is nested on pipe beam No. 2, and the other end of the furrowing and ridging device is hinged on pipe beam No. 1.

[0013] In the present invention, the covering devices are fixedly installed on the mounting beam at equal intervals.

[0014] In the present invention, the hanging side plates, the upper reinforcing plate, the lower reinforcing plate and the rear reinforcing plate are positioned and welded through positioning slots to form a main frame.

[0015] In the present invention, a right-angle U-shaped square buckle for axial fixing is provided on the mounting crossbeam.

[0016] In the present invention, the front end of the telescopic transmission shaft is connected to the high-speed riding power output shaft arranged at the bottom of the high-speed riding power machine through a first universal joint, and the rear end of the telescopic transmission shaft is connected to the gearbox power input shaft of the gearbox through a second universal joint.

[0017] In the present invention, the driving double-row sprocket is connected to the square shaft driven sprocket through the square shaft driven chain, the driving double-row sprocket is connected to the driven sprocket through the transmission chain, and the driving sprocket is connected to the bevel gear driven sprocket through the bevel gear transmission chain.

[0018] In the present invention, the soil covering plate scrapes the soil on both sides of the sowing furrow into the sowing furrow above the sowing furrow to cover the rice seeds at the bottom of the sowing furrow. In order to ensure an appropriate soil covering thickness and not disturb the rice seeds at the bottom of the furrow, the distance between the end of the soil covering plate and the lower end surface of the seed furrow opener is 5 mm.

[0019] In the present invention, the sleeve transmission device includes a bearing positioning ring, a non-standard bearing, a tube beam mounting sleeve, and a transmission sleeve, wherein the tube beam mounting sleeve and the transmission sleeve are connected through a non-standard bearing, and the bearing positioning rings are located on both sides of the tube beam mounting sleeve to limit the non-standard bearing.

[0020] In the present invention, a bearing seat mounting plate for mounting seat bearings is provided on the mounting crossbeam, and seat bearings for supporting the driving spindle of the covering device are distributed at equal intervals to ensure the transmission reliability of the driving spindle of the covering device. Beneficial Effects

[0021] 1. The present invention can cover the rice seeds in the sowing furrow with suspended soil while performing mechanical direct seeding of rice, so as to scrape the soil on both sides of the sowing furrow to the bottom of the sowing furrow to cover the rice seeds, effectively solving the problems of bird damage, rodent damage, sun exposure, rain erosion during mechanical direct seeding of rice, and the problem that mechanical direct seeding of early rice is easily affected by late spring cold;

[0022] 2. The installation method of the soil covering device in the present invention has the advantages of adjustable row spacing and reasonable structure. While making full use of the original sowing system structure, the power transmission scheme is cleverly designed to achieve synchronous matching operation of the seeding system and the soil covering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural isometric diagram of a preferred embodiment of the present invention.

[0024] Figure 2 It is a schematic structural side view of a preferred embodiment of the present invention.

[0025] Figure 3 It is a schematic rear view of the structure of a preferred embodiment of the present invention.

[0026] Figure 4 It is a schematic structural diagram of the crossbeam hanging device in a preferred embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of the structure of the soil covering mechanism in a preferred embodiment of the present invention.

[0028] Figure 6 It is a schematic diagram of the transmission system structure in a preferred embodiment of the present invention.

[0029] Figure 7 It is a schematic diagram of the structure of the shaft sleeve transmission device in a preferred embodiment of the present invention.

[0030] Figure 8 It is a transmission schematic diagram of the transmission system in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0032] See also Figure 1 A synchronous soil-covering rice direct seeding machine, comprising a high-speed riding power machine 1, a lifting mechanism 2, a sowing system 3, a soil-covering mechanism 4 and a transmission system for transmission, wherein the rear end of the high-speed riding power machine 1 is hinged to one end of the lifting mechanism 2, the other end of the lifting mechanism 2 is fixedly hinged to the sowing system 3, the soil-covering mechanism 4 is installed at the rear end of the sowing system 3, and the transmission system is connected to the sowing system 3 and the soil-covering mechanism 4;

[0033] like Figure 2 As shown, the sowing system 3 includes a main support frame 6, a seeding device 7, a No. 1 pipe beam 8, a No. 2 pipe beam 9, a furrowing and ridging device 10, a water storage furrow opener 12, a sowing furrow opener 13 and a covering plate 14. One end of the main support frame 6 is hinged to the lifting mechanism 2, the No. 1 pipe beam 8 and the No. 2 pipe beam 9 are fixedly installed on the other end of the main support frame 6, the seeding device 7 is fixedly connected to the No. 1 pipe beam 8 and the No. 2 pipe beam 9 in rows with equal spacing, one end of the furrowing and ridging device 10 is nested on the No. 2 pipe beam 9, and the other end of the furrowing and ridging device 10 is hinged on the No. 1 pipe beam 8, and a water storage furrow opener 12 and a sowing furrow opener 13 are installed on the furrowing and ridging device 10. The furrowing and ridging device 10 opens a water storage furrow and a sowing furrow on the mud surface. The water storage furrow is used to store water and remove open water in the field, and rice seeds are sown in the sowing furrow; the covering plate 14 is arranged above the sowing furrow opened by the sowing furrow opener 13;

[0034] like Figure 3 , Figure 5 As shown, the soil covering mechanism 4 includes a mounting crossbeam 15 for mounting a soil covering device 16, the soil covering device 16 and a crossbeam hanging device 17, one end of the crossbeam hanging device 17 is nested on the first pipe beam 8 and the second pipe beam 9 of the sowing system 3, and the other end of the crossbeam hanging device 17 is fixedly connected to the mounting crossbeam 15, and the soil covering device 16 is fixed to the mounting crossbeam 15 by bolts;

[0035] like Figure 4As shown, the crossbeam hanging device 17 includes a sleeve hole 18, a positioning slot 19, a seed metering device adjusting nut hole 20, an upper reinforcing plate 21, a crossbeam hanging slot 22, a soil covering drive spindle hole 23, a rear reinforcing plate 24, a crossbeam mounting slot 25, a lower reinforcing plate 27, a hanging side plate 28, a sleeve 29 and a separate axial positioning locking ring 30, wherein the hanging side plate 28 is provided with a sleeve hole 18 for installing two sets of sleeves 29, an adjusting nut hole 20 for adjusting the seed metering device 7, a soil covering drive spindle hole 23 for installing the driving soil covering device 16, and a crossbeam The mounting groove 22, the beam mounting groove 25 and the multiple positioning slots 19 are used to adjust the sowing amount of the seeding device 7 installed on both sides of the sowing system 3 through the seeding device adjusting nut hole 20, and the mounting side plate 28, the upper reinforcing plate 21, the lower reinforcing plate 27 and the rear reinforcing plate 24 are positioned and welded through the positioning slots 19 to form the main frame of the beam mounting device 17, and the two groups of pipe sleeves 29 are respectively passed through the pipe sleeve holes 18 and welded flush with the left and right end surfaces of the main frame; the axial fixation of the beam mounting device 17 on the No. 1 pipe beam 8 and the No. 2 pipe beam 9 is realized by a separate axial positioning locking ring 30;

[0036] like Figure 5 As shown, the installation beam 15 includes a beam sealing plate 31, a lower installation beam 32 and an upper installation beam 33, wherein the upper installation beam 33 and the lower installation beam 32 are respectively provided with mounting holes for the covering device, the beam sealing plate 31 is welded to both ends of the upper installation beam 33 and the lower installation beam 32, and the upper installation beam 33 is hung in the beam hanging groove 22 of the beam hanging device 17, the lower installation beam 32 is nested in the beam installation groove 25 of the beam hanging device 17, and the covering device 16 is fixedly installed on the installation beam 15 by bolts at equal intervals;

[0037] like Figure 3 As shown, the soil covering plate 14 scrapes the soil on both sides of the sowing furrow into the sowing furrow above the sowing furrow to cover the rice seeds at the bottom of the sowing furrow. In order to ensure a suitable soil covering thickness and not disturb the rice seeds at the bottom of the furrow, the distance between the end of the soil covering plate 14 and the lower end surface of the seed furrow opener 13 is 5 mm;

[0038] like Figure 6 to Figure 8As shown, the transmission system includes a high-speed riding power output shaft 11, a seat bearing 34, a covering device power input shaft 35, a bearing seat mounting plate 36, a U-shaped square buckle 37, a first universal joint 38, a telescopic transmission shaft 39, a second universal joint 40, a gearbox power input shaft 41, an active double-row sprocket 42, a sleeve transmission device 43, a bevel gear transmission chain 44, a bevel gear driven sprocket 45, a driven bevel gear 46, a covering device driving main shaft 47, an active bevel gear 48, a square shaft driven sprocket 49, a hexagonal shaft 50 of the seed metering device, a transmission chain 51, a square shaft driven chain 52, The gearbox power output shaft 53, the gearbox 54, the driven sprocket 57 and the driving sprocket 60, wherein the right-angle U-shaped square buckle 37 is used to axially fix the mounting crossbeam 15, the front end of the telescopic transmission shaft 39 is connected to the high-speed riding power output shaft 11 of the high-speed riding power machine 1 through the first universal joint 38, the rear end of the telescopic transmission shaft 39 is connected to the gearbox power input shaft 41 of the gearbox 54 through the second universal joint 40, the gearbox power output shaft 53 is connected to the active double-row sprocket 42 through a key, the gearbox 54 is fixed to the main support frame 6 by bolts, and the gearbox 5 The bevel gear in 4 converts the power into horizontal direction, the active double-row sprocket 42 is connected with the square shaft driven sprocket 49 through the square shaft driven chain 52, the square shaft driven sprocket 49 drives the seeding device 7 to operate through the hexagonal shaft 50 of the seeding device, the active double-row sprocket 42 is connected with the driven sprocket 57 through the transmission chain 51, the driven sprocket 57 and the active sprocket 60 are welded on the sprocket transmission shaft sleeve 59, the shaft sleeve transmission device 43 is fixedly nested on the No. 1 pipe beam 8, the shaft sleeve transmission device 43 realizes axial positioning on the No. 1 pipe beam 8 through the separate locking ring 30, and the active sprocket 60 is connected with the driven sprocket 57 through the bevel gear transmission chain 51. 44 is connected with the bevel driven sprocket 45. To ensure the transmission reliability of the driving main shaft 47 of the soil covering device, the driving main shaft 47 of the soil covering device is supported by three groups of equally spaced bearings 34. The bearings 34 are fixed on the mounting crossbeam 15 through the bearing seat mounting plate 36. The bevel driven sprocket 45 is connected with the driving main shaft 47 of the soil covering device through a key. The driving bevel gear 48 is connected with the driving main shaft 47 of the soil covering device through a key. The driven bevel gear 46 is connected with the power input shaft 35 of the soil covering device through a key. The power reversing is realized through the meshing of the bevel gears to drive the soil covering device 16 to operate.

[0039] The sleeve transmission device 43 includes a bearing positioning ring 55, a non-standard bearing 56, a tube beam mounting sleeve 58, and a transmission sleeve 59, wherein the tube beam mounting sleeve 58 and the transmission sleeve 59 are connected through the non-standard bearing 56, and the bearing positioning ring 55 is located on both sides of the tube beam mounting sleeve 57 to limit the non-standard bearing 56.

[0040] In this embodiment, due to different rice planting habits and different planting densities required for early and late rice, the row spacing of the rice mechanical direct seeding needs to be adjusted. The row spacing adjustment principle of the synchronous soil-covering rice direct seeding machine is: change the spacing of the seed meter 7 on the No. 1 pipe beam 8 and the No. 2 pipe beam 9 to achieve the adjustment of the row spacing to two levels of 20 cm and 25 cm, and replace the corresponding furrowing and ridging device 10 at the same time. Among the replaced furrowing and ridging devices 10, only the installation spacing of the seed furrow opener 13 and the water storage furrow opener 12 is different, and the corresponding seed furrow opener 13 is located directly below the seed meter 7. After the row spacing of the seed meter 7 is changed, The position of the covering device 16 on the mounting beam 15 also needs to be replaced. The replaced mounting beam 15 only has a different hole group spacing of the covering device mounting holes, so that the mounting spacing of the covering device 16 on the installed beam 15 corresponds to the mounting spacing of the seed meter 7. In the transmission system, the mounting spacing of the active bevel gear 48 on the driving main shaft 47 of the covering device is the same as the corresponding mounting spacing of the covering device 16. Since the operation of the sowing system 3 is driven by the hexagonal shaft, it can be used directly without replacement, thereby realizing the sowing and covering spacing of the entire synchronous covering rice direct seeding machine between 20cm and 25cm.

[0041] In this embodiment, power is output through the high-speed riding power output shaft 11 of the high-speed riding power machine 1, and one output speed is transmitted to the hexagonal shaft 50 of the seeding device at a reduction ratio of 2.7:1 through the active double-row sprocket 42 to provide power for the seeding device 7, and the other output speed is transmitted to the power input shaft 35 of the covering device at a reduction ratio of 3.4:1 to provide power for the covering device 16; during operation, the speed of the high-speed riding power machine 1 and the seeding device 7 is a fixed transmission ratio to ensure that the sowing hole spacing is consistent. At the same time, the speed ratio of the high-speed riding power machine 1 and the covering device 16 is fixed to ensure that the sowing furrow covering rate is above 83% under different hole spacings and different forward speeds. During field operations, the sowing system 3 and the covering mechanism 4 are placed on the mud surface of the field through the lifting mechanism 2, and the high-speed riding power machine 1 moves forward to drive the synchronous operation of sowing and covering.

Claims

1. A synchronous soil-covering rice direct seeding machine, comprising a high-speed riding power machine, a lifting mechanism, a sowing system, a soil-covering mechanism and a transmission system for transmission, characterized in that: The high-speed riding power machine is hinged to the lifting mechanism, the lifting mechanism is fixedly hinged to the sowing system, the covering mechanism is installed at the rear end of the sowing system, and the transmission system is connected to the sowing system and the covering mechanism; the specific structures of each part are as follows: In the sowing system, one end of the main support frame is hinged with the lifting mechanism, and a pipe beam group is fixedly installed at the other end of the main support frame. The seeding devices are fixedly connected to the pipe beam group in rows, and the furrowing and ridging device is arranged on the pipe beam group. A water storage furrow opener for opening a water storage furrow and a sowing furrow opener for opening a sowing furrow are installed on the furrowing and ridging device. A covering plate is arranged above the sowing furrow opened by the sowing furrow opener. The soil covering mechanism includes a soil covering device, a mounting crossbeam for mounting the soil covering device, and a crossbeam hanging device, wherein one end of the crossbeam hanging device is embedded in the pipe beam group of the seeding system, the other end of the crossbeam hanging device is fixedly connected to the mounting crossbeam, and the soil covering device is fixed on the mounting crossbeam; The crossbeam hanging device comprises a main frame formed by positioning and welding a hanging side plate, an upper reinforcing plate, a lower reinforcing plate and a rear reinforcing plate, and the hanging side plate is provided with a pipe sleeve hole for installing two sets of pipe sleeves, an adjusting nut hole for adjusting a seed meter, a soil covering drive spindle hole for installing a driving soil covering device, a crossbeam hanging slot, a crossbeam installation slot and a plurality of positioning card slots; In the transmission system, the front end of the telescopic transmission shaft is connected with the high-speed riding power output shaft arranged at the bottom of the high-speed riding power machine through a No. 1 universal joint, the rear end of the telescopic transmission shaft is connected with the gearbox power input shaft of the gearbox through a No. 2 universal joint, the gearbox power output shaft is connected with the active double-row sprocket by a key, the gearbox is fixed on the main support frame, the active double-row sprocket is connected with the square shaft driven sprocket, the square shaft driven sprocket is connected with the hexagonal shaft of the seeding device by a key, the square shaft driven sprocket drives the seeding device to operate through the hexagonal shaft of the seeding device, the active double-row sprocket is connected with the driven sprocket, the driven sprocket and the active sprocket are welded to the shaft sleeve transmission device, the shaft sleeve transmission device is fixedly nested on the pipe beam group, the active sprocket is connected with the bevel gear driven sprocket, the bevel gear driven sprocket is connected with the driving main shaft of the covering device by a key, the active bevel gear is connected with the driving main shaft of the covering device by a key, the driven bevel gear is connected with the power input shaft of the covering device by a key, and power reversing is realized by the meshing of the bevel gears to drive the covering device to operate.

2. A synchronous soil-covering rice direct seeding machine according to claim 1, characterized in that: The installation beam includes a beam sealing plate, a lower installation beam and an upper installation beam, wherein the upper installation beam and the lower installation beam are respectively provided with soil covering device installation holes, the beam sealing plate is welded to both ends of the upper installation beam and the lower installation beam, and the upper installation beam is hung in the beam hanging groove, and the lower installation beam is nested in the beam installation groove.

3. The synchronous soil-covering rice direct seeding machine according to claim 1, characterized in that: The pipe beam group includes pipe beam No. 1 and pipe beam No. 2, and the seeders are fixedly connected to pipe beam No. 1 and pipe beam No. 2 in rows with equal spacing; one end of the furrowing and ridging device is nested on pipe beam No. 2, and the other end of the furrowing and ridging device is hinged on pipe beam No.

1.

4. The synchronous soil-covering rice direct seeding machine according to claim 1, characterized in that: A right-angle U-shaped square buckle for axial fixation is provided on the mounting crossbeam.

5. The synchronous soil-covering rice direct seeding machine according to claim 1, characterized in that: The driving double-row sprocket is connected to the square shaft driven sprocket through the square shaft driven chain, the driving double-row sprocket is connected to the driven sprocket through the transmission chain, and the driving sprocket is connected to the bevel gear driven sprocket through the bevel gear transmission chain.

6. The synchronous soil-covering rice direct seeding machine according to claim 1, characterized in that: The distance between the end of the covering plate and the lower end surface of the seed furrow opener is 5 mm.

7. The synchronous soil-covering rice direct seeding machine according to claim 1, characterized in that: The shaft sleeve transmission device comprises a bearing locating ring, a non-standard bearing, a tube beam mounting shaft sleeve, and a transmission shaft sleeve, wherein the tube beam mounting shaft sleeve is connected with the transmission shaft sleeve through a non-standard bearing, and the bearing locating ring is located on both sides of the tube beam mounting shaft sleeve.

8. The synchronous soil-covering rice direct seeding machine according to claim 1, characterized in that: A bearing seat mounting plate for mounting a seat bearing is arranged on the mounting crossbeam, and the seat bearings for supporting the driving main shaft of the covering device are distributed at equal intervals.

9. The synchronous soil-covering rice direct seeding machine according to any one of claims 1 to 8, characterized in that: Power is output through the high-speed riding power output shaft of the high-speed riding power machine, and is transmitted to the hexagonal shaft of the seeding device through the active double-row sprocket to provide power for the seeding device, and the other output is transmitted to the power input shaft of the soil covering device to provide power for the soil covering device; during operation, the speed of the high-speed riding power machine and the seeding device is a fixed transmission ratio to ensure consistent sowing hole spacing, and at the same time, the speed of the high-speed riding power machine and the soil covering device is a fixed transmission ratio to ensure the soil covering rate of the sowing furrow under different hole spacings and different forward speeds; during field operations, the sowing system and the soil covering mechanism are placed on the field mud surface through the lifting mechanism, and the high-speed riding power machine moves forward to drive the synchronous operation of sowing and soil covering.

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