Folding and retractable profiling seeder

Abstract

The folding and retractable profiling seeder of the present invention comprises a frame, a main rotating shaft, a secondary rotating shaft, a driving press wheel, a driven press wheel, a folding mechanism, a transmission mechanism, a pair of driving wheels, a pair of driven steering wheels, an adjustable seeding system and a driving system. The driving press wheel is mounted at one end of the frame through the main rotating shaft, and the driven press wheel is mounted at the other end of the frame through the secondary rotating shaft. The folding mechanism is mounted on the frame and sleeved with the main rotating shaft and the secondary rotating shaft respectively. The pair of driving wheels and the driven steering wheels are fixedly connected to the folding mechanisms on both sides of the corresponding ends. The transmission mechanism connects the main rotating shaft and the driving wheels. The adjustable seeding system and the driving system are mounted on the frame, and the driving system is connected to the main rotating shaft. It has the advantages of simple structure, convenient operation, reducible overall machine cost and energy consumption, and capable of realizing the function of ground contact switching.

Description

Technical Field

[0001] The present invention mainly relates to agricultural seeding instruments, and particularly relates to a folding and retractable profiling seeder. Background Art

[0002] The seed project has always been the focus of the world's economic work. As a populous country, it is particularly important for our country to cultivate excellent varieties, increase grain yields, and ensure food security. For the cultivation of new crop varieties, the test quality is of utmost importance. Therefore, a self-propelled numerically controlled plot seeder with high automation, accurate, stable, and reliable seeding has become an urgently needed tool for each scientific research and breeding unit to carry out new variety cultivation, improved seed breeding, and variety comparison, cultivation and other field tests. At present, the seeding requirements for self-propelled plot drills are: walking without relying on external power, evenly sowing a certain amount of seeds within the specified plot length, and after sowing one plot, sowing the next plot without stopping the machine. When sowing the next plot, there should be no seed residue in the seeding and fertilizing machine to avoid cross-contamination between varieties.

[0003] In the process of agricultural scientific research experiments, seeding is an extremely important link. In order to ensure the accuracy of the test results, the seeding in the test plots has high requirements for row spacing control and the uniformity of seeds within and between rows. For example, it is necessary to evenly sow a certain amount of seeds within the specified plot length, and the seeding within and between rows in the same plot should be uniform, and cross-contamination between different plots should be avoided. At present, there are still many experimental plots in our country that use traditional manual seeding, which has the disadvantages of high labor intensity, cumbersome procedures, low seeding efficiency, uneven seeding, etc., seriously affecting the accuracy of agricultural scientific research experiments.

[0004] In recent years, some scientific research institutions or universities have begun to use domestic (Hongxinglong, Heilongjiang) and imported (Austria) plot seeders for seeding. Since the seeder needs to travel and turn in the field and on normal ground, when traveling in these two terrain environments, it is necessary to switch the contact of the walking wheels and the pressing wheels with the ground. In the prior art, most of them use a lifting frame to realize the lifting of the pressing wheel, so as to achieve the contact switching of the walking wheels and the pressing wheels. However, this method requires the configuration of a lifting frame. On the one hand, it increases the overall cost of the machine. On the other hand, it requires a lifting drive to drive the lifting frame to drive the pressing wheel to move, resulting in high energy consumption. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a folding and retractable profiling seeder with a simple structure, convenient operation, which can reduce the overall cost and energy consumption of the machine and can realize the function of contact switching.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A folding and retractable profiling seeder, comprising a frame, a main rotating shaft, a secondary rotating shaft, a driving compaction wheel, a driven compaction wheel, a folding mechanism, a transmission mechanism, a pair of driving wheels, a pair of driven steering wheels, an adjustable seeding system and a driving system. The driving compaction wheel is installed at one end of the frame through the main rotating shaft, the driven compaction wheel is installed at the other end of the frame through the secondary rotating shaft. The folding mechanism is installed on the frame and is respectively sleeved on the main rotating shaft and the secondary rotating shaft. A pair of the driving wheels and the driven steering wheels are fixedly connected to the folding mechanisms on both sides of the corresponding ends. The transmission mechanism connects the main rotating shaft and the driving wheels. The adjustable seeding system and the driving system are installed on the frame, and the driving system is connected to the main rotating shaft.

[0008] As a further improvement of the above technical solution:

[0009] The folding mechanism includes a driving motor, a driving gear, a rack, two pairs of gear sleeves and two pairs of bearings. The driving motor is fixedly installed on the frame. The rack is movably installed on the frame. The driving gear is installed on the output shaft of the driving motor and meshes with the rack. The two pairs of gear sleeves are respectively sleeved on the main rotating shaft and the secondary rotating shaft through the two pairs of bearings, and at least two gear sleeves on one side mesh with the rack. The driving wheels and the driven steering wheels are fixedly connected to the corresponding gear sleeves.

[0010] A guide sleeve is arranged on the frame, and the rack is movably sleeved in the guide sleeve.

[0011] The driving wheel includes a main wheel frame, a main wheel body and a main wheel shaft. The main wheel frame is fixedly connected to the corresponding gear sleeve, and the main wheel body is installed on the main wheel frame through the main wheel shaft.

[0012] The transmission mechanism includes a pair of sprockets and a chain. The pair of sprockets are respectively installed on the main wheel shaft and the main rotating shaft, and the chain connects the pair of sprockets.

[0013] The driven steering wheel includes a driven wheel frame, a driven wheel body, a driven wheel shaft and a universal joint. The universal joint is fixedly connected to the corresponding gear sleeve. The driven wheel frame is installed at the bottom of the universal joint, and the driven wheel body is installed on the driven wheel frame through the driven wheel shaft.

[0014] It further includes two pairs of support members. One end of the support member at the main wheel frame end is hinged to the frame, and the other end is hinged to the corresponding main wheel frame. One end of the support member at the driven wheel frame end is hinged to the frame, and the other end is hinged to the corresponding driven wheel frame.

[0015] The support member includes a pair of hinged connecting rods. One connecting rod at the main wheel frame end is connected to the frame, and the other connecting rod is connected to the corresponding main wheel frame. One connecting rod at the driven wheel frame end is connected to the frame, and the other connecting rod is connected to the corresponding driven wheel frame.

[0016] The adjustable seeding system includes a seed metering frame, a lifting support, a lifting driving member, a plurality of seed meters and a plurality of seeding furrow openers. The seed metering frame is installed on the machine frame. Each of the seed meters is installed on the seed metering frame at intervals. The lifting driving member is installed on the seed metering frame. The lifting support is movably installed on the seed metering frame and is driven by the lifting driving member to move up and down. Each of the seeding furrow openers is installed on the lifting support at intervals and is connected to the corresponding seed meter.

[0017] The seeding furrow opener includes a furrow plow, a seed guiding pipe and a seed discharging pipe. The seed guiding pipe is installed on the lifting support. The furrow plow is installed at the bottom of the seed guiding pipe. One end of the seed discharging pipe is connected to the top of the seed guiding pipe, and the other end is connected to the seed discharging port of the seed meter.

[0018] A plurality of laterally adjustable connecting sleeves are installed on the lifting support, and the seed guiding pipe is connected to the corresponding connecting sleeve.

[0019] The seed discharging pipe is sleeved inside the seed guiding pipe.

[0020] The seed discharging pipe is arranged as a flexible pipe.

[0021] The lifting driving member is arranged as an electric cylinder.

[0022] The driving system includes a diesel engine and a clutch. Both the diesel engine and the clutch are installed on the machine frame. The diesel engine is connected to the main rotating shaft through the clutch.

[0023] Compared with the prior art, the advantages of the present invention are as follows:

[0024] In the folding and retractable profiling seeding machine of the present invention, when the seeding machine is running, the driving system drives the main rotating shaft to rotate to realize the movement forward, and the adjustable seeding system realizes seeding. When moving forward on normal ground, the folding mechanism acts to drive the driving wheel and the driven steering wheel to rotate around the central axes of the main rotating shaft and the driven rotating shaft, so that the driving wheel and the driven steering wheel are placed at the lowest point. The main rotating shaft then drives the driving wheel to rotate through the transmission mechanism, so as to realize the rotation and movement forward of the driving wheel and the driven steering wheel. When turning, the driven steering wheel can be manually rotated; when working in the field, the folding mechanism acts to drive the driving wheel and the driven steering wheel to rotate around the central axes of the main rotating shaft and the driven rotating shaft, so that the driving wheel and the driven steering wheel are placed at the highest point. The main rotating shaft directly drives the driving press wheel to rotate, so as to realize the rotation and movement forward of the driving press wheel and the driven press wheel. At this time, the driving wheel rotates idly. Compared with the traditional structure, this system realizes the raising and lowering of the driving wheel and the driven steering wheel through the folding mechanism, so as to realize the function of switching the ground contact during field operation and normal ground movement. There is no need to configure a lifting frame. On the one hand, the cost of the whole machine is reduced. On the other hand, there is no need for a lifting driving member to drive the lifting frame to drive the press wheel to act, reducing the energy consumption. Its structure is simple and the operation is convenient. Description of the Drawings

[0025] Figure 1 is a schematic diagram of the three-dimensional structure of the present invention.

[0026] Figure 2 is a schematic diagram of the front view structure of the present invention.

[0027] Figure 3 is a schematic diagram of the assembly structure of the frame in the present invention (three-dimensional perspective).

[0028] Figure 4 is a schematic diagram of the assembly structure of the driving wheel in the present invention.

[0029] Figure 5 is a schematic diagram of the assembly structure of the driven steering wheel in the present invention.

[0030] Figure 6 is a schematic diagram of the assembly structure of the frame in the present invention (front perspective).

[0031] Figure 7 is a schematic diagram of the structure of the adjustable seeding system in the present invention.

[0032] Each label in the figure represents:

[0033] 1. Frame; 2. Main rotating shaft; 3. Driven rotating shaft; 4. Active press wheel; 5. Driven press wheel; 6. Folding mechanism; 61. Driving motor; 62. Driving gear; 63. Rack; 64. Gear shaft sleeve; 65. Bearing; 7. Transmission mechanism; 71. Sprocket; 72. Chain; 8. Driving wheel; 81. Main wheel frame; 82. Main wheel body; 83. Main wheel shaft; 9. Driven steering wheel; 91. Driven wheel frame; 92. Driven wheel body; 93. Driven wheel shaft; 94. Universal joint; 10. Adjustable seeding system; 101. Seed metering frame; 102. Lifting bracket; 1021. Connecting sleeve; 103. Lifting driving member; 104. Seed metering device; 105. Seeding furrow opener; 1051. Furrow plow; 1052. Seed guiding pipe; 1053. Seed metering pipe; 11. Driving system; 111. Diesel engine; 112. Clutch; 12. Guide sleeve; 13. Support member; 131. Connecting rod. Detailed implementation manners

[0034] The following will further describe the present invention in detail with reference to the accompanying drawings of the specification and specific embodiments.

[0035] Figures 1 to 7An embodiment of the folding and retractable profiling seeding machine of the present invention is shown, which includes a frame 1, a main rotating shaft 2, a slave rotating shaft 3, a driving compaction wheel 4, a driven compaction wheel 5, a folding mechanism 6, a transmission mechanism 7, a pair of driving wheels 8, a pair of driven steering wheels 9, an adjustable seeding system 10 and a driving system 11. The driving compaction wheel 4 is installed at one end of the frame 1 through the main rotating shaft 2, and the driven compaction wheel 5 is installed at the other end of the frame 1 through the slave rotating shaft 3. The folding mechanism 6 is installed on the frame 1 and is respectively sleeved with the main rotating shaft 2 and the slave rotating shaft 3. A pair of driving wheels 8 and driven steering wheels 9 are fixedly connected to the folding mechanism 6 on both sides of the corresponding end. The transmission mechanism 7 connects the main rotating shaft 2 and the driving wheel 8. The adjustable seeding system 10 and the driving system 11 are installed on the frame 1, and the driving system 11 is connected to the main rotating shaft 2. When the seeding machine operates, the driving system 11 drives the main rotating shaft 2 to rotate to achieve forward movement, and the adjustable seeding system 10 realizes seeding. When moving on normal ground, the folding mechanism 6 acts to drive the driving wheels 8 and the driven steering wheels 9 to rotate around the central axes of the main rotating shaft 2 and the slave rotating shaft 3, so that the driving wheels 8 and the driven steering wheels 9 are placed at the lowest point. The main rotating shaft 2 then drives the driving wheel 8 to rotate through the transmission mechanism 7, so as to realize the rotation and forward movement of the driving wheels 8 and the driven steering wheels 9. When steering, the driven steering wheel 9 can be manually rotated; when working in the field, the folding mechanism 6 acts to drive the driving wheels 8 and the driven steering wheels 9 to rotate around the central axes of the main rotating shaft 2 and the slave rotating shaft 3, so that the driving wheels 8 and the driven steering wheels 9 are placed at the highest point. The main rotating shaft 2 directly drives the driving compaction wheel 4 to rotate, so as to realize the rotation and forward movement of the driving compaction wheel 4 and the driven compaction wheel 5. At this time, the driving wheels 8 rotate idly. Compared with the traditional structure, this system realizes the elevation and lowering of the driving wheels 8 and the driven steering wheels 9 through the folding mechanism 6, so as to realize the ground contact switching function between field operation and normal ground movement. There is no need to configure a lifting frame. On the one hand, the overall cost of the machine is reduced. On the other hand, there is no need for a lifting driving part to drive the lifting frame to drive the compaction wheel to act, reducing energy consumption. Its structure is simple and the operation is convenient.

[0036] In this embodiment, the folding mechanism 6 includes a driving motor 61, a driving gear 62, a rack 63, two pairs of gear sleeves 64 and two pairs of bearings 65. The driving motor 61 is fixedly installed on the frame 1, the rack 63 is movably installed on the frame 1, the driving gear 62 is installed on the output shaft of the driving motor 61 and meshes with the rack 63. The two pairs of gear sleeves 64 are respectively sleeved on the main rotating shaft 2 and the driven rotating shaft 3 through the two pairs of bearings 65, and at least two gear sleeves 64 on one side mesh with the rack 63. The driving wheel 8 and the driven steering wheel 9 are fixedly connected to the corresponding gear sleeves 64. In this structure, when the driving motor 61 rotates forward, the rack 63 is driven to move horizontally by the driving gear 62. The rack 63 will drive the gear sleeve 64 to rotate forward, and the gear sleeve 64 will drive the driving wheel 8 and the driven steering wheel 9 to rotate forward and swing to the lowest point, so as to realize the touchdown switching during normal ground travel; when the driving motor 61 rotates reversely, the rack 63 is driven to move horizontally in the reverse direction by the driving gear 62. The rack 63 will drive the gear sleeve 64 to rotate reversely, and the gear sleeve 64 will drive the driving wheel 8 and the driven steering wheel 9 to rotate reversely and swing to the highest point, so as to realize the touchdown switching during field operation. Its structure is simple and reliable.

[0037] In this embodiment, a guide sleeve 12 is provided on the frame 1, and the rack 63 is movably sleeved in the guide sleeve 12. On the one hand, the guide sleeve 12 forms the installation basis of the rack 63, and on the other hand, it plays a guiding role in the movement of the rack 63 to ensure stability.

[0038] In this embodiment, the driving wheel 8 includes a main wheel frame 81, a main wheel body 82 and a main wheel shaft 83. The main wheel frame 81 is fixedly connected to the corresponding gear sleeve 64, and the main wheel body 82 is installed on the main wheel frame 81 through the main wheel shaft 83. In this structure, a one-way wheel structure is formed by the main wheel frame 81, the main wheel body 82 and the main wheel shaft 83, and its structure is simple and reliable.

[0039] In this embodiment, the transmission mechanism 7 includes a pair of sprockets 71 and a chain 72. The pair of sprockets 71 are respectively installed on the main wheel shaft 83 and the main rotating shaft 2, and the chain 72 connects the pair of sprockets 71. In this structure, the power of the main rotating shaft 2 is transmitted to the main wheel shaft 83 through the sprockets 71 and the chain 72, so as to drive the rotation of the driving wheel 8. Its structure is simple and ingenious.

[0040] In this embodiment, the driven steering wheel 9 includes a driven wheel frame 91, a driven wheel body 92, a driven wheel shaft 93 and a universal joint 94. The universal joint 94 is fixedly connected to the corresponding gear sleeve 64, the driven wheel frame 91 is installed at the bottom of the universal joint 94, and the driven wheel body 92 is installed on the driven wheel frame 91 through the driven wheel shaft 93. In this structure, a universal wheel structure is formed by the driven wheel frame 91, the driven wheel body 92, the driven wheel shaft 93 and the universal joint 94. Its structure is simple and reliable and can realize steering.

[0041] In this embodiment, there are also two pairs of support members 13. One end of the support member 13 at the end of the main wheel frame 81 is connected to the frame 1, and the other end is connected to the corresponding main wheel frame 81. One end of the support member 13 at the end of the driven wheel frame 91 is connected to the frame 1, and the other end is connected to the corresponding driven wheel frame 91. In this structure, the support member 13 plays a supporting role for the main wheel frame 81 and the driven wheel frame 91, ensuring the stability and reliability of the main wheel frame 81 and the driven wheel frame 91 after swinging.

[0042] In this embodiment, the support member 13 includes a pair of hinged connecting rods 131. One connecting rod 131 at the end of the main wheel frame 81 is hinged to the frame 1, and the other connecting rod 131 is hinged to the corresponding main wheel frame 81. One connecting rod 131 at the end of the driven wheel frame 91 is hinged to the frame 1, and the other connecting rod 131 is hinged to the corresponding driven wheel frame 91. In this structure, the hinged connecting rods 131 form a movable structure. When the driving wheel 8 and the driven steering wheel 9 are placed at the lowest point, the two connecting rods 131 are collinear at this time, realizing dead point fixation and ensuring stability during normal travel.

[0043] In this embodiment, the adjustable seeding system 10 includes a seed metering frame 101, a lifting bracket 102, a lifting driving member 103, a plurality of seed meters 104 and a plurality of seeding furrow openers 105. The seed metering frame 101 is installed on the frame 1. The seed meters 104 are installed on the seed metering frame 101 at intervals. The lifting driving member 103 is installed on the seed metering frame 101. The lifting bracket 102 is movably installed on the seed metering frame 101 and is driven by the lifting driving member 103 to move up and down. The seeding furrow openers 105 are installed on the lifting bracket 102 at intervals and are connected to the corresponding seed meters 104. During seeding, the seeding furrow opener 105 first performs a furrowing action, and then the seeds in the seed meter 104 fall into the furrow through the seeding furrow opener 105 to achieve seeding. When turning, the lifting driving member 103 drives the lifting bracket 102 to drive the plurality of seeding furrow openers 105 to rise, so that the seeding furrow openers 105 are higher than the furrows, so as not to damage the box surface during turning. Compared with the traditional structure, this seeding system realizes the height adjustment of the seeding furrow opener 105 through the cooperation of the lifting driving member 103 and the lifting bracket 102, avoids damaging the box surface during turning, does not require the overall lifting of the frame of the seeding machine, and has a simple structure, reducing costs and energy consumption.

[0044] In this embodiment, the seeding furrow opener 105 includes a furrowing plow 1051, a seed guiding pipe 1052 and a seed discharging pipe 1053. The seed guiding pipe 1052 is installed on the lifting bracket 102. The furrowing plow 1051 is installed at the bottom of the seed guiding pipe 1052. One end of the seed discharging pipe 1053 is connected to the top of the seed guiding pipe 1052, and the other end is connected to the seed discharging port of the seed meter 104. In this structure, the furrowing plow 1051 realizes the furrowing action, and the seeds are discharged from the seed meter 104 to the seed discharging pipe 1053 and are sown through the seed guiding pipe 1052, and its structure is simple and reliable.

[0045] In this embodiment, a plurality of laterally adjustable connecting sleeves 1021 are installed on the lifting bracket 102, and the seed guiding pipe 1052 is connected to the corresponding connecting sleeve 1021. Such a setting enables each seed guiding pipe 1052 to be adjustable in the lateral direction, thereby realizing adjustable plant spacing.

[0046] In this embodiment, the seed discharging pipe 1053 is sleeved inside the seed guiding pipe 1052. The sleeving method facilitates disassembly, assembly and maintenance.

[0047] In this embodiment, the seed discharging pipe 1053 is arranged as a flexible pipe. Being arranged as a flexible pipe enables it to have adaptability in the vertical and lateral directions, that is, it can adapt to the vertical and lateral adjustments of the seed guiding pipe 1052.

[0048] In this embodiment, the lifting driving member 103 is arranged as an electric cylinder. Its structure is simple and feasible.

[0049] In this embodiment, the driving system 11 includes a diesel engine 111 and a clutch 112. Both the diesel engine 111 and the clutch 112 are installed on the frame 1, and the diesel engine 111 is connected to the main rotating shaft 2 through the clutch 112. In this structure, the diesel engine 111 transmits power to the main rotating shaft 2 through the clutch 112, thereby driving the whole to move forward.

[0050] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make many possible changes and modifications to the technical solution of the present invention by using the above-disclosed technical content, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A folding and retractable profiling seeder, characterized in that: It includes a frame (1), a main rotating shaft (2), a driven rotating shaft (3), a driving press wheel (4), a driven press wheel (5), a folding mechanism (6), a transmission mechanism (7), a pair of driving wheels (8), a pair of driven steering wheels (9), an adjustable seeding system (10) and a driving system (11). The driving press wheel (4) is installed at one end of the frame (1) through the main rotating shaft (2), and the driven press wheel (5) is installed at the other end of the frame (1) through the driven rotating shaft (3). The folding mechanism (6) is installed on the frame (1) and is sleeved with the main rotating shaft (2) and the driven rotating shaft (3) respectively. A pair of the driving wheels (8) and the driven steering wheels (9) are fixedly connected to the folding mechanisms (6) on both sides of the corresponding ends. The transmission mechanism (7) connects the main rotating shaft (2) and the driving wheels (8). The adjustable seeding system (10) and the driving system (11) are installed on the frame (1), and the driving system (11) is connected to the main rotating shaft (2). The folding mechanism (6) includes a driving motor (61), a driving gear (62), a rack (63), two pairs of gear sleeves (64) and two pairs of bearings (65). The driving motor (61) is fixedly installed on the frame (1). The rack (63) is movably installed on the frame (1). The driving gear (62) is installed on the output shaft of the driving motor (61) and meshes with the rack (63). The two pairs of gear sleeves (64) are sleeved with the main rotating shaft (2) and the driven rotating shaft (3) respectively through the two pairs of bearings (65), and at least two gear sleeves (64) on one side mesh with the rack (63). The driving wheels (8) and the driven steering wheels (9) are fixedly connected to the corresponding gear sleeves (64). When traveling on normal ground, the folding mechanism (6) operates to drive the driving wheels (8) and the driven steering wheels (9) to rotate around the central axes of the main rotating shaft (2) and the driven rotating shaft (3), so that the driving wheels (8) and the driven steering wheels (9) are placed at the lowest points, thereby realizing the rotational travel of the driving wheels (8) and the driven steering wheels (9). When working in the field, the folding mechanism (6) operates to drive the driving wheels (8) and the driven steering wheels (9) to rotate around the central axes of the main rotating shaft (2) and the driven rotating shaft (3), so that the driving wheels (8) and the driven steering wheels (9) are placed at the highest points, thereby realizing the rotational travel of the driving press wheel (4) and the driven press wheel (5). At this time, the driving wheels (8) rotate idly. The adjustable seeding system (10) includes a seed metering frame (101), and the seed metering frame (101) is installed on the frame (1). The driving system (11) includes a diesel engine (111).

2. The folding and retractable profiling seeder according to claim 1, wherein: A guide sleeve (12) is provided on the frame (1), and the rack (63) is movably sleeved in the guide sleeve (12).

3. The folding and retractable profiling seeder according to claim 2, characterized in that: The driving wheel (8) includes a main wheel frame (81), a main wheel body (82) and a main wheel shaft (83). The main wheel frame (81) is fixedly connected to the corresponding gear sleeve (64), and the main wheel body (82) is installed on the main wheel frame (81) through the main wheel shaft (83).

4. The folding and retractable profiling seeder according to claim 3, wherein: The transmission mechanism (7) includes a pair of sprockets (71) and a chain (72). The pair of sprockets (71) are respectively installed on the main wheel shaft (83) and the main rotating shaft (2), and the chain (72) connects the pair of sprockets (71).

5. The folding and retractable profiling seeder according to claim 4, wherein: The driven steering wheel (9) includes a driven wheel frame (91), a driven wheel body (92), a driven wheel shaft (93) and a universal joint (94). The universal joint (94) is fixedly connected to the corresponding gear shaft sleeve (64). The driven wheel frame (91) is installed at the bottom of the universal joint (94), and the driven wheel body (92) is installed on the driven wheel frame (91) through the driven wheel shaft (93).

6. The folding and retractable profiling seeder according to claim 5, wherein: It further includes two pairs of support members (13). One end of the support member (13) at the main wheel frame (81) end is connected to the machine frame (1), and the other end is connected to the corresponding main wheel frame (81). One end of the support member (13) at the driven wheel frame (91) end is connected to the machine frame (1), and the other end is connected to the corresponding driven wheel frame (91).

7. The folding and retractable profiling seeder according to claim 6, characterized in that: The support member (13) includes a pair of hinged connecting rods (131). One connecting rod (131) at the main wheel frame (81) end is hinged to the machine frame (1), and the other connecting rod (131) is hinged to the corresponding main wheel frame (81). One connecting rod (131) at the driven wheel frame (91) end is hinged to the machine frame (1), and the other connecting rod (131) is hinged to the corresponding driven wheel frame (91).

8. The folding and retractable profiling seeder according to any one of claims 1 to 7, characterized in that: The adjustable seeding system (10) further includes a lifting bracket (102), a lifting driving member (103), a plurality of seed meters (104) and a plurality of seeding furrow openers (105). Each of the seed meters (104) is installed on the seed meter frame (101) at intervals. The lifting driving member (103) is installed on the seed meter frame (101). The lifting bracket (102) is movably installed on the seed meter frame (101) and is driven by the lifting driving member (103) to lift and lower. Each of the seeding furrow openers (105) is installed on the lifting bracket (102) at intervals and is connected to the corresponding seed meter (104).

9. The folding and retractable profiling seeder according to claim 8, wherein: The seeding furrow opener (105) includes a furrow plow (1051), a seed guiding pipe (1052) and a seed discharging pipe (1053). The seed guiding pipe (1052) is installed on the lifting bracket (102). The furrow plow (1051) is installed at the bottom of the seed guiding pipe (1052). One end of the seed discharging pipe (1053) is connected to the top of the seed guiding pipe (1052), and the other end is connected to the seed discharging port of the seed meter (104).

10. The folding and retractable profiling seeder according to claim 9, wherein: A plurality of transversely adjustable connecting sleeves (1021) are installed on the lifting bracket (102), and the seed guiding pipe (1052) is connected to the corresponding connecting sleeve (1021).

11. The folding and retractable profiling seeder according to claim 10, characterized in that: The seed discharging pipe (1053) is sleeved inside the seed guiding pipe (1052).

12. The folding and retractable profiling seeder according to claim 11, characterized in that: The seed discharging pipe (1053) is provided as a flexible pipe.

13. The folding and retractable profiling seeder according to claim 12, wherein: The lifting driving member (103) is provided as an electric cylinder.

14. The folding and retractable profiling seeder according to any one of claims 1 to 7, characterized in that: The drive system (11) further includes a clutch (112). The diesel engine (111) and the clutch (112) are both installed on the machine frame (1). The diesel engine (111) is connected to the main rotating shaft (2) through the clutch (112).

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