Adjustable precise variable cotton combined sowing operation machine

Abstract

The utility model discloses an adjustable variable cotton combined seeding operation machine, which belongs to the field of agricultural machinery and comprises a ditching device, a soil returning (covering) device, a pressing device, a seeding device, a walking device and a transmission device, the furrowing device is mounted at the foremost end of the rack and mainly comprises a double-disc stubble-cutting furrow opener and a stubble-cutting furrow opener connecting beam; the soil covering device mainly comprises a splayed double-disc soil covering device and a soil covering wheel connecting beam, and is positioned right behind the double-disc stubble-cutting furrow opener; the pressing device mainly comprises a hollow semi-solid rubber wheel and a pressing wheel connecting frame, can be used for compacting soil covered with soil, and is positioned behind the soil covering wheel; the seeding device consists of a seed box, an adjustable precise variable seed metering device, a seed guide pipe, a seed blocking brush, a seed filling wheel, a seed blocking rod, a seed cleaning device, a seed protecting device and a tensioning device; according to the utility model, working procedures such as stubble cutting, ditching, seeding, soil covering and pressing can be completed at one time during operation, and the requirements on seeding operation and seeding quality can be well completed on the ground surface are met.

Description

Technical Field

[0001] The utility model relates to the field of agricultural machinery, in particular to an adjustable precision variable cotton combined sowing machine. Technical Background

[0002] Seeders are important mechanical equipment in agricultural production and an important part of modern agricultural production. They are used to spread seeds accurately in the soil to achieve uniform sowing and improve agricultural production efficiency. With the advancement of agricultural modernization, the technology of seeders continues to develop, and their functions and performance continue to improve. Different sowing methods will also directly affect the utilization rate of seeds. According to the different needs of different growing environments of crops, existing seeders also have certain limitations in adapting to different soil types and sowing conditions. According to the sowing method, seeders can be divided into row seeders, hole seeders, broadcast seeders, precision seeders, combined seeders, etc.; currently many crop seeders are mostly suitable for sowing a single crop, and uneven seed distribution may occur during the sowing process, which may lead to uneven crop growth and affect yield and quality; improper sowing depth control or sowing device failure may result in seeds not being sown correctly, but falling on the soil surface or too deep, causing waste; instability in sowing depth will affect seed germination and growth; the soil may be excessively disturbed during sowing, especially in soft or moist soils, which may cause damage to the soil structure and affect seed germination; sowing speeds that are too fast or too slow may result in reseeding or missed sowing; improper protective measures during sowing may lead to seed damage, affecting germination rate and growth, and ultimately affecting sowing quality. Summary of the invention

[0003] In view of the above problems, the utility model provides an adjustable precision variable cotton combined seeder, which can perform tasks such as stubble breaking, furrowing, sowing, covering, and pressing, thereby achieving precision variable sowing and to a certain extent improving the problems of uneven sowing, seed waste, unstable sowing depth, etc. of the seeder during the sowing process.

[0004] The adjustable precision variable cotton sowing machine is characterized in that: the combined sowing machine can complete the work of stubble breaking, furrowing, sowing, covering, pressing and the like at one time; the combined sowing machine comprises a stubble breaking and furrowing device, a sowing device, a covering device, and a pressing device; comprises a traction bracket (1), a double disc stubble breaking and furrowing device (2), a frame (3), a double disc stubble breaking and furrowing device connecting beam (4), a seed guide tube (5), a fixed connecting plate 1 (6), a fixed connecting plate 2 (7), a fixed connecting plate 3 (8), an active bolt 1 (9 ), depth limiting wheel (10), adjusting spring (11), depth adjusting device (12), walking wheel (13), soil covering wheel connecting beam (14), soil covering wheel (15), pressing wheel (16), V-type partition (17), pressing wheel connecting bracket (18), transmission device (19), adjustable precision variable seed metering device (20), transmission belt system (21), transmission shaft (22), seed box (23), motor (24), motor outer box (25), walking wheel connecting frame (26), hydraulic telescopic rod (27) and other main working parts.

[0005] The cotton combined operation machine is provided with a traction support (1), and the frame (3) is attached with a fixed connecting plate 1 (6), a fixed connecting plate 2 (7), and a fixed connecting plate 3 (8), and a motor (24) is provided at the end thereof; the fixed connecting plate 1 (6), the fixed connecting plate 2 (7), and the fixed connecting plate 3 (8) are respectively used to connect a walking wheel (13), a double-disc stubble breaking furrow opener (2), an adjustable precision variable seed metering device (20), and a pressing wheel (16) mechanism.

[0006] The double-disc stubble-breaking furrow opener (2) is connected to the front end of the frame (3) by means of a double-disc stubble-breaking furrow opener connecting beam (4); the covering wheel (15) is connected to the rear of the double-disc stubble-breaking furrow opener (2) via a covering wheel connecting beam (14); the pressing wheel (16) is connected to a fixed connecting plate (8) on the frame (3) via a V-shaped partition (17) and a pressing wheel connecting bracket (18), and is located behind the covering wheel (15).

[0007] The travel wheel (13) is connected to the frame (3) through a travel wheel connecting frame (26) and a hydraulic telescopic rod (27); a fixed connecting plate (7) on the frame (3) is connected to a double disc stubble breaking and furrowing device (2) and an adjustable precision variable seeding device (20), wherein a seed box (23) is provided at the upper end of the adjustable precision variable seeding device (20), a seed guide tube (5) is provided at the lower end of the adjustable precision variable seeding device (20), and is located in the middle of the double disc stubble breaking and furrowing device (2), and a depth limiting wheel (10) is installed The double disc stubble breaking furrow opener (2) is disposed at both ends of the double disc stubble breaking furrow opener (2); the depth adjustment device (12) is arranged between the double disc stubble breaking furrow opener (2) and the soil covering wheel (15) mechanism, and the furrowing depth and soil covering depth are adjusted by adjusting the spring (11), thereby indirectly affecting the sowing depth of the seed meter; the transmission shaft (22) is connected to the driving wheel of the adjustable precision variable seed meter (20), and the transmission device (19) and the transmission belt system (21) are driven by the rotation of the motor (24), thereby realizing the normal sowing work.

[0008] The adjustable precision variable seed metering device (20) comprises a seed-blocking brush (28), a bearing (29), a seed-protecting belt (30), a tensioning wheel mechanism (31), a seed-discharging port (32), a seed-clearing mechanism (33), an adjustable socket wheel mechanism (34), a cam adjustment mechanism (35), an adjustable roller mechanism (36), a seed-filling wheel (37), a seed-blocking rod (38), an adjustable spring (39), an active bolt 2 (40), a roller (41), a socket wheel (42), an angular contact ball bearing (43), a rear housing (44), and a front housing (45); the transmission shaft (22) is driven to rotate by the rotation of the motor (24), thereby driving the adjustable precision variable seed metering device (20) to work, and its working process comprises seed-filling, seed-carrying, seed-protecting, seed-clearing, and seed-dropping stages, and intermittent seeding and precision variable seeding are achieved by means of the cam adjustment mechanism (35) and the adjustable roller mechanism (36).

[0009] The integrated ditching and soil covering mechanism comprises a double-disc stubble-breaking ditching device (2), a depth-limiting wheel (10), an adjusting spring (11), a depth-adjusting device (12), a soil-covering wheel (15), a fixed stopper (46), a connecting plate (47), a connecting bracket (48), a connecting rod (49), a rotating shaft (50), and a depth-adjusting rod (51); the double-disc stubble-breaking ditching device (2) and the depth-limiting wheel (10) are connected to the connecting bracket (48) via the rotating shaft (50); the adjustable spring (11) is connected to the connecting bracket (48) via the rotating shaft (50); the depth-limiting wheel (10) is connected to the connecting bracket (48) via the rotating shaft (50); the depth-adjusting device (12) is connected to the soil-covering wheel (15); the fixing stopper (46) is connected to the connecting bracket (48) via the rotating shaft (50 ... 11) is connected between the end of the connecting bracket (48) and the depth adjustment rod (51), the fixed stop rod (46) is used to limit the soil penetration depth range of the double disc stubble breaking furrow opener (2) and the covering wheel (15), the covering wheel (15) is connected to the connecting bracket (48) by means of a rotating shaft (50) through the covering wheel connecting beam (14), and the double disc stubble breaking furrow opener (2) is connected to the adjustable precision variable seed metering device (20) by means of bolts through the connecting plate (47) at the upper end.

[0010] The suppressing wheel (16) comprises a suppressing wheel (16), a V-shaped partition (17), a suppressing wheel connecting bracket (18), a movable connecting rod (52), a rotating shaft (53), a positioning plate (54), and a fixed connecting piece (55); the suppressing wheel (16) is connected to the V-shaped partition (17), the suppressing wheel connecting bracket (18), and the movable connecting rod (52) on the same rotating shaft through the rotating shaft (53); the movable connecting rod (52) is connected to the fixed connecting plate three (8) through the active bolt 1 (9); the fixed connecting piece (55) is used to ensure the stability and firmness of the connecting piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the utility model of an adjustable precision variable cotton combined sowing machine;

[0012] Figure 2 This is a schematic diagram of the left side view of the utility model of an adjustable precision variable cotton combined sowing machine;

[0013] Figure 3 This is a front view schematic diagram of the utility model of an adjustable precision variable cotton combined sowing machine;

[0014] Figure 4 This is a front view schematic diagram of the adjustable precision variable seed metering device of the utility model;

[0015] Figure 5 This is a schematic diagram of the adjustable roller mechanism of the utility model;

[0016] Figure 6 It is a front view and a side view schematic diagram of the socket wheel of the utility model;

[0017] Figure 7 It is a rear view schematic diagram and a side view schematic diagram of the adjustable precision variable seed metering device of the utility model;

[0018] Figure 8 This is a schematic diagram of the ditching-covering integrated mechanism of the utility model;

[0019] Fig. 9 It is a schematic diagram of the suppression device of the utility model.

[0020] Markings in the figure:

[0021] 1-traction bracket, 2-double disc stubble breaker furrow opener, 3-frame, 4-double disc stubble breaker furrow opener connecting beam, 5-seed guide tube, 6-fixed connecting plate 1, 7-fixed connecting plate 2, 8-fixed connecting plate 3, 9-active bolt 1, 10-depth limiting wheel, 11-adjusting spring, 12-depth adjusting device, 13-travel wheel, 14-soil covering wheel connecting beam, 15-soil covering wheel, 16-pressing wheel, 17-V-type partition, 18 presser wheel connecting bracket, 19-transmission device, 20-adjustable precision variable seed metering device, 21-transmission belt system, 22-transmission shaft, 23-seed box, 24-motor, 25-motor outer box, 26-travel wheel connecting frame, 27-hydraulic Telescopic rod, 28-seed-blocking brush, 29-bearing, 30-seed protection belt, 31-tensioning wheel mechanism, 32-seed discharge port, 33-seed cleaning mechanism, 34-adjustable socket wheel mechanism, 35-cam adjustment mechanism, 36-adjustable roller mechanism, 37-seed filling wheel, 38-seed-blocking rod, 39-adjustable spring, 40-active bolt 2, 41-roller, 42-socket wheel, 43-angular contact ball bearing, 44-rear housing, 45-front housing, 46-fixed blocking rod, 47-connecting plate, 48-connecting bracket, 49-connecting rod, 50-rotating shaft, 51-depth adjustment rod, 52-movable connecting rod, 53-rotating shaft, 54-positioning plate, 55-fixed connecting piece. DETAILED DESCRIPTION

[0022] In order to further illustrate the implementation scheme of the present utility model, the following drawings are introduced.

[0023] like Figures 1 to 3As shown, an adjustable precision variable cotton combined seeding machine comprises a traction support (1), a double disc stubble breaker and furrow opener (2), a frame (3), a double disc stubble breaker and furrow opener connecting beam (4), a seed guide tube (5), a fixed connecting plate 1 (6), a fixed connecting plate 2 (7), a fixed connecting plate 3 (8), an active bolt 1 (9), a depth limiting wheel (10), an adjustment spring (11), a depth adjustment device (12), a walking wheel (13), a soil covering wheel connecting beam (14), a soil covering wheel (15), a pressure wheel (16), a V-shaped partition (17), a pressure wheel connecting bracket (18), a transmission device (19), an adjustable precision variable seeding device (20), a transmission belt system (21), a transmission shaft (22), a seed box (23), a motor (24), a motor outer box (25), a walking wheel connecting frame (26), and a hydraulic telescopic rod (27). The frame (3) is connected to the agricultural tractor by a traction bracket (1) so as to drive the whole machine forward. The depth-limiting wheel (10) is installed at the front end of the machine and serves as a wheel. The double-disc stubble-breaking furrow opener (2) is connected to the frame (3) by means of a double-disc stubble-breaking furrow opener connecting beam (4). The motor (24) is fixed to the frame (3) by bolts. The motor (24) and the transmission shaft (22) are connected by a transmission belt so as to realize transmission. The seed guide tube (5) is fixed to the bottom of the adjustable precision variable seed metering device (20) by screws and is located between the double-disc stubble-breaking furrow opener (2). Sowing operations can be performed while furrowing. The covering wheel (15) is connected to the connecting bracket (48) by means of a rotating shaft (50) through the covering wheel connecting beam (14). The adjusting spring (11) is connected to the end of the connecting bracket (48) and the depth adjusting spring (11). Between the adjusting rods (51), the fixed stop rod (46) is used to limit the soil penetration depth range of the double disc stubble breaking furrow opener (2) and the soil covering wheel (15). The depth adjusting rod (51) adjusts the furrowing and soil covering depth range of the double disc stubble breaking furrow opener (2) and the soil covering wheel (15) by changing different rod positions. The double disc stubble breaking furrow opener (2) is connected and fixed together with the adjustable precision variable seed metering device (20) by bolts through the connecting plate (47) at the upper end. The pressing wheel (16) is connected to the V-shaped partition plate (17) and the pressing wheel connecting bracket (18) through the rotating shaft (53). The movable connecting rod (52) is connected to the same rotating shaft. The movable connecting rod (52) is connected to the fixed connecting plate three (8) through the active bolt 1 (9). The walking wheel (13) is connected to the frame (3) through the walking wheel connecting frame (26) and the hydraulic telescopic rod (27).

[0024] Working principle: A tractor traction power device is connected to a traction support (1), thereby dragging a frame (3) to drive the whole machine forward; a depth limiting wheel (10) limits the depth of the machine and also acts as a wheel; before the machine performs an immersion operation, a traveling wheel (13) is retracted through a hydraulic telescopic rod (27) to ensure that the immersion operation parts contact the soil; a double disc stubble breaking and furrowing device (2) performs stubble breaking and furrowing when the machine moves forward; a motor (24) provides power and is connected to a transmission shaft (22) through a transmission belt to achieve transmission; seeds enter a seed guide tube (5) through a seed meter and finally enter a seed furrow opened by the double disc stubble breaking and furrowing device (2); a soil covering wheel (15) backfills the seed furrow opened by the double disc stubble breaking and furrowing device (2) with soil; and a pressure wheel (16) compacts the soil surface backfilled by the soil covering wheel (15).

[0025] like Figures 4 to 7 The figure shows a schematic diagram of an adjustable precision variable seed metering device of the utility model. The adjustable precision variable seed metering device (20) mainly comprises a seed box (23), a seed-blocking brush (28), a bearing (29), a seed protection belt (30), a tensioning wheel mechanism (31), a seed-discharging port (32), a seed-clearing mechanism (33), an adjustable socket wheel mechanism (34), a cam adjustment mechanism (35), an adjustable roller mechanism (36), a seed-filling wheel (37), a seed-blocking rod (38), an adjustable spring (39), an active bolt 2 (40), a roller (41), a socket wheel (42), an angular contact ball bearing (43), A rear housing (44) and a front housing (45); a seed-blocking brush (28), a tensioning wheel mechanism (31), an adjustable socket wheel mechanism (34) and a seed-filling wheel (37) are connected to the rear housing (44) through bearings (29) and angular contact ball bearings (43); a seed protection belt (30) is connected around the tensioning wheel mechanism (31); a seed guide tube (5) is fixed to the bottom of the adjustable precision variable seed metering device (20) by screws; a seed cleaning mechanism (33) is embedded in a fixing plate and fixed to the lower plate of the rear housing (44) by fastening bolts; and the rear housing (44) and the front housing (45) are fixed together by fastening bolts.

[0026] The adjustable precision variable seeding device has a working principle: its working process includes seed filling, seed carrying, seed protection, seed cleaning and seed dropping stages. First, the seeds enter the seeding device from the seed box (23). With the rotation of the socket wheel (42) and the seed filling wheel (37), the seeds enter the molded hole. The rotation of the seed filling wheel (37) can prevent the accumulation of seeds and the occurrence of arching. The edge end of the socket wheel (42) is designed as a gently inclined structure, which is more conducive to the seeds sliding into the molded hole of the socket wheel (42). The adjustable roller mechanism (36) controls the depth of the molded hole with the help of the cam adjustment mechanism (35), thereby controlling the number of seeds in the molded hole. The seed blocking brush (28) can sweep out the excess seeds in the molded hole to achieve single-seed precision sowing. The tensioning wheel mechanism (31) is used to adjust the tension of the seed protection belt (30), so that the seed protection belt (30) can adapt to the shape and size of the seeds during the sowing process, provide good protection, and at the same time buffer the force exerted on the seeds, and ensure the passability of the seeding wheel. The bottom end of the socket wheel (42) is provided with a seed clearing mechanism (33). The embedded mechanism is used to clear the seeds. The embedded thin slice is meshed with the gap track in the middle of the socket wheel. The thin slice is embedded to an appropriate depth. When the shaped hole rotates to contact the thin slice, the seeds are forced to be planted. The seeds are discharged from the seed discharge port (32) along the seed guide tube (5) into the seed groove, thereby avoiding the occurrence of double seeding and missed seeding. The operation finally realizes intermittent seeding and precise variable seeding.

[0027] like Figure 8 The figure shows a schematic diagram of the integrated ditching and soil covering structure of the utility model, comprising: a double disc stubble ditching device (2), a depth limiting wheel (10), an adjusting spring (11), a depth adjusting device (12), a soil covering wheel (15), a fixed stopper (46), a connecting plate (47), a connecting bracket (48), a connecting rod (49), a rotating shaft (50), and a depth adjusting rod (51); the double disc stubble ditching device (2) is connected to the connecting bracket (48) through a double disc stubble ditching device connecting beam (4) and the depth limiting wheel (10) through a rotating shaft (50), the adjustable spring (11) is connected and fixed between the end of the connecting bracket (48) and the depth adjusting rod (51), and the soil covering wheel (15) is connected to the connecting bracket (48) through a soil covering wheel connecting beam (14) by means of a rotating shaft (50).

[0028] The working principle of the integrated furrowing and covering structure is as follows: during operation, the double disc stubble furrowing device (2) first opens a seed furrow in the forward direction, the depth limiting wheel (10) limits the depth of the machine and also acts as a wheel to control the sowing depth and ensure that the seeds are sown in the soil at a correct depth, the covering wheel (15) backfills the seed furrow opened by the double disc stubble furrowing device (2) with soil, and the depth adjustment device (12) between the double disc stubble furrowing device (2) and the covering wheel (15) adjusts the elasticity of the adjustment spring (11) through the depth adjustment rod (51), thereby controlling the soil penetration depth of the double disc stubble furrowing device (2) and the covering wheel (15).

[0029] like Fig. 9 The figure is a schematic diagram of the structure of the suppression device of the utility model, comprising: a suppression wheel (16), a V-shaped partition (17), a suppression wheel connecting bracket (18), a movable connecting rod (52), a rotating shaft (53), a positioning plate (54), and a fixed connecting member (55); the suppression wheel (16) is connected to the V-shaped partition (17), the suppression wheel connecting bracket (18), and the movable connecting rod (52) on the same rotating shaft through the rotating shaft (53), the movable connecting rod (52) is connected to the fixed connecting plate three (8) through the active bolt 1 (9), and the fixed connecting member (55) is used to secure the V-shaped partition (17) on the suppression wheel connecting bracket (18).

[0030] Working principle of the suppression device: With the completion of the trenching and covering operation, the soil is compacted by the suppression action of the suppression wheel (16), increasing the soil density and firmness. The surface texture of the suppression wheel (16) adopts a V-shaped arc, and the material is selected as a semi-solid rubber wheel, which can reduce the soil adhesion problem during the operation process, improve the stability of the suppression wheel operation and reduce resistance and slippage. The movable connecting rod (52) can make the suppression wheel (16) adjustable in height during operation, thereby ensuring the soil density and firmness, protecting the soil moisture, and creating a suitable seed bed environment for seed germination and emergence. The V-shaped partition (17) can prevent the soil from sliding sideways, maintain the consistency of the sowing row, and control the amount of soil to prevent too much soil from being pushed above the seeds.

Claims

1. An adjustable precision variable cotton combined sowing machine, characterized by : It comprises a double disc stubble breaking and furrowing device, a precision variable sowing device, and a soil covering and pressing device; it comprises a traction bracket (1), a double disc stubble breaking and furrowing device (2), a frame (3), a double disc stubble breaking and furrowing device connecting beam (4), a seed guide tube (5), a fixed connecting plate 1 (6), a fixed connecting plate 2 (7), a fixed connecting plate 3 (8), an active bolt 1 (9), a depth limiting wheel (10), an adjustment spring (11), a depth adjustment device (12), a walking wheel (13), a soil covering wheel connecting beam (14), a soil covering wheel (15), a pressing wheel (16), a V-shaped partition (17), a pressing wheel connecting bracket (18), a transmission device (19), an adjustable precision variable sowing device (20), a transmission device (21), a transmission device (22), a transmission device (23), a transmission device (24), a transmission device (25), a transmission device (26), a transmission device (27), a transmission device (28), a transmission device (29), a transmission device (30), a transmission device (31), a transmission device (32), a transmission device (33), a transmission device (34), a transmission device (35), a transmission device (36), a transmission device (37), a transmission device (38), a transmission device (39), a transmission device (40), a transmission device (41), a transmission device (42), a transmission device (43), a transmission device (44), a transmission device (45), a transmission device (46), a transmission device (47), a transmission device (48), a transmission device (49), a transmission device (50), a transmission device (51), a transmission device (52), a transmission device (53), a transmission device (54), a transmission device (55), a transmission device (56), a transmission device (57), a transmission device (58), a transmission device (59), a transmission device (60), a transmission device (61), a transmission device (62), a transmission device The main working parts of the cotton combined operation machine are a driving belt system (21), a transmission shaft (22), a seed box (23), a motor (24), a motor outer box (25), a walking wheel connecting frame (26), and a hydraulic telescopic rod (27); the front end of the cotton combined operation machine is provided with a traction bracket (1); the frame (3) is attached with a fixed connecting plate 1 (6), a fixed connecting plate 2 (7), and a fixed connecting plate 3 (8); the end is provided with a motor (24); the fixed connecting plate 1 (6), the fixed connecting plate 2 (7), and the fixed connecting plate 3 (8) are respectively used to connect the walking wheel (13), the double disc stubble breaking and furrowing device (2) and the adjustable precision variable seed metering device (20), and the pressing wheel (16); the double disc stubble breaking and furrowing device (2) is provided with a driving belt system (21), a transmission shaft (22), a seed box (23), a motor (24), and a motor (24) are respectively used to connect the walking wheel (13), the double disc stubble breaking and furrowing device (2) and the adjustable precision variable seed metering device (20), and the pressing wheel (16); the double disc stubble breaking and furrowing device (2) is provided with a driving belt system (21), a transmission shaft (22), a seed box (23 ... provided on the fixing plate The furrow cutter (2) is connected to the front end of the frame (3) through a double-disc stubble-breaking furrow cutter connecting beam (4); the soil-covering wheel (15) is connected to the rear of the double-disc stubble-breaking furrow cutter (2) through a soil-covering wheel connecting beam (14); the pressure wheel (16) is connected to a fixed connecting plate three (8) on the frame (3) through a V-shaped partition plate (17) and a pressure wheel connecting bracket (18), and is located behind the soil-covering wheel (15); the walking wheel (13) is connected to the frame (3) through a walking wheel connecting frame (26) and a hydraulic telescopic rod (27); the fixed connecting plate two (7) on the frame (3) connects the double-disc stubble-breaking furrow cutter (2) and the adjustable precision variable seed metering device (20) The adjustable precision variable seeding device (20) is provided with a seed box (23) at the upper end, and a seed guide tube (5) is provided at the lower end of the adjustable precision variable seeding device (20), which is located in the middle of the double disc stubble breaking furrow opener (2), and the depth limiting wheel (10) is installed at both ends of the double disc stubble breaking furrow opener (2); the depth adjustment device (12) is arranged between the double disc stubble breaking furrow opener (2) and the soil covering wheel (15) mechanism, and the furrowing depth and soil covering depth are adjusted by the action of the adjustment spring (11); the transmission shaft (22) is connected to the driving wheel of the adjustable precision variable seeding device (20), and the transmission device (19) and the transmission belt system (21) are driven by the rotation of the motor (24), thereby realizing the sowing work.

2. The adjustable precision variable cotton combined sowing machine according to claim 1 is characterized by: The adjustable precision variable seed metering device (20) comprises a seed-blocking brush (28), a bearing (29), a seed-protecting belt (30), a tensioning wheel mechanism (31), a seed-discharging port (32), a seed-clearing mechanism (33), an adjustable socket wheel mechanism (34), a cam adjustment mechanism (35), an adjustable roller mechanism (36), a seed-filling wheel (37), a seed-blocking rod (38), an adjustable spring (39), an active bolt 2 (40), a roller (41), a socket wheel (42), an angular contact ball bearing (43), a rear housing (44), and a front housing (45); the transmission shaft (22) is driven to rotate by the rotation of the motor (24), thereby driving the adjustable precision variable seed metering device (20) to work, and its working process comprises seed-filling, seed-carrying, seed-protecting, seed-clearing, and seed-dropping stages, and intermittent seeding and precision variable seeding are achieved by means of the cam adjustment mechanism (35) and the adjustable roller mechanism (36).

3. The adjustable precision variable cotton combined sowing machine according to claim 1 is characterized by: The ditching-covering integrated mechanism comprises a double-disc stubble-breaking ditching device (2), a depth-limiting wheel (10), an adjusting spring (11), a depth-adjusting device (12), a covering wheel (15), a fixed stopper (46), a connecting plate (47), a connecting bracket (48), a connecting rod (49), a rotating shaft (50), and a depth-adjusting rod (51); the double-disc stubble-breaking ditching device (2) and the depth-limiting wheel (10) are connected to the connecting bracket (48) via the rotating shaft (50); the adjusting spring (11) is connected between the end of the connecting bracket (48) and the depth-adjusting rod (51); the fixed stopper (46) is used to control the depth range of the double-disc stubble-breaking ditching device (2) and the covering wheel (15); the covering wheel (15) is connected to the connecting bracket (48) via the covering wheel connecting beam (14) by means of the rotating shaft (50); and the connecting plate (47) is connected to the adjustable precision variable seed metering device (20) via bolts.

4. The adjustable precision variable cotton combined sowing machine according to claim 1 is characterized by: The suppressing wheel (16) comprises a suppressing wheel (16), a V-shaped partition (17), a suppressing wheel connecting bracket (18), a movable connecting rod (52), a rotating shaft (53), a positioning plate (54), and a fixed connecting piece (55); the suppressing wheel (16) is connected to the V-shaped partition (17), the suppressing wheel connecting bracket (18), and the movable connecting rod (52) on the same rotating shaft through the rotating shaft (53); the movable connecting rod (52) is connected to the fixed connecting plate three (8) through the active bolt 1 (9); the fixed connecting piece (55) is used to ensure the stability and firmness of the connecting piece.

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