A traction type angelica dahurica harvester

Abstract

The application discloses a traction Angelica dahurica harvesting machine, which comprises a frame, a transmission device, a root block digging device, a traction suspension and profiling walking device, a primary root-soil separation device, a secondary root-soil separation device, a soil crushing device and a throwing and cleaning device. The root block digging device is arranged at the front end of the frame and is used for digging up Angelica dahurica roots and the surrounding soil body integrally; the primary root-soil separation device is used for receiving the material conveyed by the digging device and performing preliminary screening; the secondary root-soil separation device is arranged below the primary root-soil separation device and is used for secondary root-soil separation; the soil crushing device comprises soil crushing rollers arranged above the primary and secondary root-soil separation devices respectively and is used for crushing the adhered soil blocks; and the throwing and cleaning device is arranged at the rear end of the frame and is used for further cleaning and throwing the Angelica dahurica roots backward. Through the combined design of two-stage screening and forced soil crushing, the problems of soil block agglomeration, strong adhesion and easy clogging under heavy soil conditions are effectively solved, and the root-soil separation rate and operation stability are significantly improved.

Description

Technical Field

[0001] This invention relates to a tractor-driven Angelica dahurica harvester, belonging to the field of agricultural machinery and equipment technology. Background Technology

[0002] Angelica dahurica, a perennial herb belonging to the Apiaceae family, has seen its annual market demand stabilize at over 20,000 tons in recent years, driven by the booming development of the health industry. The industry scale continues to expand. However, current Angelica dahurica production is still primarily based on manual harvesting, facing a bottleneck of "no mechanized harvesting available, and difficult use of organic methods." Traditional harvesting methods are labor-intensive, costly, and prone to damaging the medicinal material, making them unsuitable for large-scale cultivation. With the continuous development of deep processing technology for Angelica dahurica, higher requirements are being placed on raw material quality, harvesting efficiency, and resource utilization. Currently, most root and tuber harvesters are designed for tuberous crops, with rapid digging and screening processes that can easily break Angelica dahurica roots. Furthermore, single-stage screening structures are prone to soil adhesion and grid blockage in heavy, moist soil conditions, resulting in incomplete soil removal. Existing equipment also lacks soil-breaking devices and secondary vibrating screening mechanisms suitable for clay clumps, leading to poor operational stability. Therefore, developing specialized harvesting machinery adapted to the characteristics of Angelica dahurica cultivation is of great significance for promoting the high-quality development of the Angelica dahurica industry and improving the comprehensive utilization rate of resources. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a tractor-driven Angelica dahurica harvester for the planting scenario of Angelica dahurica in heavy clay soil in the south, so as to solve the problems of soil adhesion, screen blockage and difficulty in soil removal when operating in clay soil in the prior art. It can still achieve efficient and low-damage harvesting of Angelica dahurica roots under high humidity and high viscosity soil conditions, and improve the environmental adaptability and operational stability of the equipment.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] A towed Angelica dahurica harvester includes a frame, a transmission device, a root and tuber digging device, a traction suspension and contour-following walking device, a primary root and soil separation device, a secondary root and soil separation device, a soil crushing device, and a throwing and cleaning device.

[0006] The transmission device, root and block excavation device, traction suspension and contour walking device, primary root and soil separation device, secondary root and soil separation device, soil crushing device, and throwing and cleaning device are mounted on the frame. One end of the transmission device is connected to the power device, and the other end transmits power to the primary root and soil separation device, secondary root and soil separation device, soil crushing device, and throwing and cleaning device. The root and block excavation device at the front first contacts the ground and stably cuts into the soil layer under the action of machine traction and its own weight. When the machine moves forward, it digs out the angelica along with the soil. The primary root and soil separation device removes loose soil, and the root blocks, stones, and stubble are left on the screen and conveyed backward to complete the initial soil screening. The secondary separation device is installed below and behind the primary separation device. The throwing and cleaning device is installed at the end of the implement to improve the cleanliness of the root blocks.

[0007] The transmission device includes a gearbox 1, a gearbox power input shaft 2, a gearbox output shaft a3, a gearbox output shaft b4, a drive shaft a5, a drive shaft b6, a sprocket a7, a drive chain a8, a sprocket b9, a sprocket c10, a drive chain b11, a sprocket d12, a gear a13, a gear b14, a sprocket e15, a drive chain c16, a sprocket f17, a gear c18, a sprocket g19, a drive chain d20, a sprocket h21, a sprocket i22, a drive chain e23, a sprocket j24, a sprocket k25, a drive chain f26, a sprocket l27, a double sprocket 28, a drive chain g29, a sprocket m30, a drive chain h31, and a sprocket n32. The gearbox 1 is mounted on the upper part of the frame; the gearbox power input shaft 2 is connected to the tractor PTO via a universal joint; the gearbox output shaft a3 is connected to one end of the drive shaft a5, and the other end of the drive shaft a5 is equipped with a sprocket a7, which is connected to sprocket b9 via a drive chain a8. Sprocket b9 is coaxially mounted with sprocket c10, and sprocket c10 is connected to sprocket d12 via a drive chain b11. Sprocket d12 is coaxially mounted with gear a13, and one side of gear a13 meshes with gear b14. Gear b14 is coaxially mounted with sprocket e15, and sprocket e15 is connected to sprocket f17 via a drive chain c16. Sprocket f17 provides power to the soil crushing device located above the primary root soil separation device; the other side of gear a13 meshes with gear c18, and gear c18 is coaxial with sprocket g19. The installation involves sprocket g19 connected to sprocket h21 via drive chain d20, with sprocket h21 providing power to the soil-crushing device positioned above the secondary root-soil separation unit. Gearbox output shaft b4 is connected to one end of drive shaft b6, with sprocket i22 at the other end. Sprocket i22 is connected to sprocket j24 via drive chain e23. Sprocket j24 is coaxially mounted with sprocket k25. Sprocket k25 is connected to sprocket l27 via drive chain f26. Sprocket l27 is coaxially mounted with double sprockets 28. One sprocket in the double sprockets 28 is connected to sprocket m30 via drive chain g29, providing power to the shaking wheel of the secondary root-soil separation unit. The other sprocket in the double sprockets 28 is connected to sprocket n32 via drive chain h31, providing power to the throwing and cleaning device.

[0008] The root excavation device consists of an excavating shovel 36 and an excavating shovel transition tooth 37. The soil-entry end of the excavating shovel 36 is designed with a serrated structure, consisting of multiple equally spaced teeth, each with an included angle of 46°, to enhance soil-entry capability and reduce excavation resistance. The excavating shovel 36 is fixed to the front end of the frame and is installed at the front end of the frame via an angle adjustment connection structure to adjust its soil-entry angle. Under normal operating conditions, the excavating shovel is tilted forward and downward relative to the horizontal plane, with an included angle of 20°-30°, preferably 25°. The excavating shovel transition tooth 37 is installed behind the excavating shovel 36 to prevent angelica roots and soil clods from getting stuck or accumulating at the excavating shovel outlet, ensuring smooth material feeding.

[0009] The traction suspension and contour-following travel device consists of a hydraulic cylinder 38, a three-point suspension device 39, a suspension frame 40, and a ground wheel 41. The three-point suspension device 39 is located at the front of the frame and is used to connect with the tractor; the hydraulic cylinder 38 is hinged to the suspension frame 40 and is used to adjust the attitude of the frame relative to the ground. The maximum stroke of the cylinder is 200mm. When the machine is in the default stationary state, the distance from the highest point of the three-point suspension to the tip of the shovel is 1590mm; the ground wheel 41 is located at the lower part of the frame and is used to support the frame and control the working depth.

[0010] The primary root-soil separation device consists of guide wheel a42, support wheel 43, grid a44, drive chain a45, sprocket a46, front chain plate drive shaft 47, and front chain plate side plate 48. The device has a total length of 1590mm and is inclined at the front and rear along the material conveying direction, with an angle of 36.8° to the horizontal plane. The grid a44 and drive chain a45 are fixed together to form an lifting chain, used to receive the mixture from the root block excavation device and complete the initial soil screening. The lifting chain is powered by sprocket b9, which rotates at 249 r / min. Sprocket b9 and sprocket a46 are both on the front chain plate drive shaft 47. Guide wheel a42 is installed at the front end of the primary root-soil separation device, controlling the running trajectory and tension of the lifting chain; support wheel 43 is installed on the front chain plate side plate 48 to prevent the lifting chain from sagging.

[0011] The secondary root-soil separation device consists of a guide wheel b49, a drive chain b50, a grid b51, a vibrating wheel 52, a swivel wheel b53, a rear chain drive shaft 54, and a soil-shaking roller shaft 55. The device has a total length of 1110 mm and is arranged at an angle of 23° to the horizontal along the material conveying direction, with the front lower than the rear. The grid b51 and the drive chain b50 are fixed together to form an lifting chain. The lifting chain is powered by a sprocket l27, which rotates at 206 r / min. The sprocket l27 and the swivel wheel b53 are both located on the rear chain drive shaft 54. The guide wheel b49 is installed at the front end of the secondary root-soil separation device. The vibrating wheel 52 is installed on the soil-shaking roller shaft 55 and is powered by a sprocket m30. The vibrating wheel 52 works in conjunction with the lifting chain to generate periodic vibrations during operation, thereby enhancing the root-soil separation effect.

[0012] The soil-crushing device consists of a soil-pressing roller 33, an adjusting screw 34, a soil-crushing toothed rod 56, and a drive shaft 57. The soil-pressing roller 33 and the soil-crushing toothed rod 56 are fixed together to form a soil-crushing roller. The soil-crushing roller is positioned above the corresponding root-soil separation device, and an adjustable gap is formed between the soil-crushing roller and the corresponding root-soil separation device. The minimum gap is 80mm to ensure effective breaking of soil clumps while avoiding damage to the roots of Angelica dahurica. The soil-crushing roller positioned above the primary root-soil separation device is powered by a sprocket f17, and the soil-crushing roller positioned above the secondary root-soil separation device is powered by a sprocket h21. The gap between the soil-crushing roller and the corresponding root-soil separation device is adjusted by the adjusting screw 34 to break up the heavy, sticky soil clumps attached to the roots of Angelica dahurica.

[0013] The throwing and cleaning device consists of a transition roller shaft 58, a support disc 59, and cleaning grid bars 60. The spacing between adjacent cleaning grid bars 60 is 88 mm. The throwing and cleaning device is installed at the rear end of the frame. The support disc 59 and the cleaning grid bars 60 are fixed together to form a throwing and cleaning roller, which is powered by a sprocket n32. The throwing and cleaning roller has a diameter of 250 mm to achieve the throwing and cleaning separation of Angelica dahurica root blocks.

[0014] The harvester has a working width of 1600mm, a total weight of 1100kg, and requires a power output of 180 horsepower or above.

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

[0016] 1. No need for row-to-row or plant-to-plant operations: Through the combined design of overall excavation, two-stage screening and forced soil crushing, operations can be carried out without row-to-row or plant-to-plant operations, greatly improving work efficiency.

[0017] 2. Addressing key pain points in heavy clay soils: Effectively solves industry pain points such as soil clumps, strong adhesion, and easy clogging under heavy clay soil conditions, significantly improving root-soil separation rate and operational stability.

[0018] 3. Reduce root and stem damage: The adjustable gap soil crushing device, low-speed lifting chain, and vibration control prevent excessive compression and breakage of the Angelica dahurica roots.

[0019] 4. Improve harvesting cleanliness and output continuity: The rear-mounted throwing and cleaning device reduces secondary soil mixing of roots and rhizomes, ensuring harvesting cleanliness and output continuity.

[0020] 5. Improve equipment environmental adaptability and operational stability: The overall structural design fully considers the heavy clay soil conditions in the south, and comprehensively optimizes the operational quality and adaptability of Angelica dahurica harvesting. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a front view of the present invention;

[0023] Figure 3 This is a schematic diagram of the left-side transmission of the present invention;

[0024] Figure 4 This is a schematic diagram of the transmission on the right side of the present invention;

[0025] Figure 5 This is a schematic diagram of the primary root-soil separation device of the present invention;

[0026] Figure 6 This is a schematic diagram of the two-stage root-soil separation device of the present invention;

[0027] Figure 7 This is a schematic diagram of the soil-breaking device of the present invention;

[0028] Figure 8 This is a schematic diagram of the throwing and cleaning device of the present invention.

[0029] Labels in the diagram: 1-Gearbox, 2-Gearbox power input shaft, 3-Gearbox output shaft a, 4-Gearbox output shaft b, 5-Drive shaft a, 6-Drive shaft b, 7-Sprocket a, 8-Drive chain a, 9-Sprocket b, 10-Sprocket c, 11-Drive chain b, 12-Sprocket d, 13-Gear a, 14-Gear b, 15-Sprocket e, 16-Drive chain c, 17-Sprocket f, 18-Gear c, 19-Sprocket g, 20-Drive chain d, 21-Sprocket h, 22-Sprocket i, 23-Drive chain e, 24-Sprocket j, 25-Sprocket k, 26-Drive chain f, 27-Sprocket l, 28-Double sprocket, 29-Drive chain g, 30-Sprocket m, 31 - Drive chain h, 32- Sprocket n, 33- Soil compaction roller, 34- Adjusting screw, 35- Throwing and cleaning device, 36- Excavating shovel, 37- Excavating shovel transition tooth, 38- Hydraulic cylinder, 39- Three-point suspension device, 40- Suspension, 41- Ground wheel, 42- Guide wheel a, 43- Track roller, 44- Grid bar a, 45- Drive chain a, 46- Plum blossom wheel a, 47- Front chain plate drive shaft, 48- Front chain plate side plate, 49- Guide wheel b, 50- Drive chain b, 51- Grid bar b, 52- Shaking wheel, 53- Plum blossom wheel b, 54- Rear chain plate drive shaft, 55- Soil-shaking roller shaft, 56- Soil-crushing toothed rod, 57- Drive shaft, 58- Transition roller shaft, 59- Support spoke, 60- Cleaning grid bar. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] Example 1

[0032] like Figure 1-8 As shown, a towed Angelica dahurica harvester includes a frame, a transmission device, a root and tuber digging device, a traction suspension and contour-following walking device, a primary root and soil separation device, a secondary root and soil separation device, a soil crushing device, and a throwing and cleaning device.

[0033] The transmission device, root and block excavation device, traction suspension and contour-following walking device, primary root and soil separation device, secondary root and soil separation device, soil crushing device, and throwing and cleaning device are mounted on the frame. One end of the transmission device is connected to the power unit, and the other end transmits power to the primary root and soil separation device, secondary root and soil separation device, soil crushing device, and throwing and cleaning device. The root and block excavation device at the front first contacts the ground and stably cuts into the soil layer under the action of machine traction and its own weight. As the machine moves forward, it digs out the angelica along with the soil. The primary root and soil separation device removes loose soil, leaving root blocks, stones, and stubble on the screen surface for conveying backward, completing the initial soil screening. The secondary separation device is installed below and behind the primary separation device. The throwing and cleaning device is installed at the end of the implement to improve the cleanliness of the root blocks.

[0034] The transmission device includes a gearbox 1, a gearbox power input shaft 2, a gearbox output shaft a3, a gearbox output shaft b4, a drive shaft a5, a drive shaft b6, a sprocket a7, a drive chain a8, a sprocket b9, a sprocket c10, a drive chain b11, a sprocket d12, a gear a13, a gear b14, a sprocket e15, a drive chain c16, a sprocket f17, a gear c18, a sprocket g19, a drive chain d20, a sprocket h21, a sprocket i22, a drive chain e23, a sprocket j24, a sprocket k25, a drive chain f26, a sprocket l27, a double sprocket 28, a drive chain g29, a sprocket m30, a drive chain h31, and a sprocket n32. The gearbox 1 is mounted on the upper part of the frame; the gearbox power input shaft 2 is connected to the tractor PTO via a universal joint; the gearbox output shaft a3 is connected to one end of the drive shaft a5, and the other end of the drive shaft a5 is equipped with a sprocket a7, which is connected to sprocket b9 via a drive chain a8. Sprocket b9 is coaxially mounted with sprocket c10, and sprocket c10 is connected to sprocket d12 via a drive chain b11. Sprocket d12 is coaxially mounted with gear a13, and one side of gear a13 meshes with gear b14. Gear b14 is coaxially mounted with sprocket e15, and sprocket e15 is connected to sprocket f17 via a drive chain c16. Sprocket f17 provides power to the soil crushing device located above the primary root soil separation device; the other side of gear a13 meshes with gear c18, and gear c18 is coaxial with sprocket g19. The installation involves sprocket g19 connected to sprocket h21 via drive chain d20, with sprocket h21 providing power to the soil-crushing device positioned above the secondary root-soil separation unit. Gearbox output shaft b4 is connected to one end of drive shaft b6, with sprocket i22 at the other end. Sprocket i22 is connected to sprocket j24 via drive chain e23. Sprocket j24 is coaxially mounted with sprocket k25. Sprocket k25 is connected to sprocket l27 via drive chain f26. Sprocket l27 is coaxially mounted with double sprockets 28. One sprocket in the double sprockets 28 is connected to sprocket m30 via drive chain g29, providing power to the shaking wheel of the secondary root-soil separation unit. The other sprocket in the double sprockets 28 is connected to sprocket n32 via drive chain h31, providing power to the throwing and cleaning device.

[0035] The root excavation device consists of an excavating shovel 36 and an excavating shovel transition tooth 37. The soil-entry end of the excavating shovel 36 is designed with a serrated structure, consisting of multiple equally spaced teeth, each with an included angle of 46°. The excavating shovel 36 is fixed to the front end of the frame, and an adjusting nut at the lower end of the excavating shovel 36 allows for adjustment of the soil-entry angle. Under normal operating conditions, the excavating shovel is tilted forward and downward relative to the horizontal plane, with an included angle of 20°-30°, preferably 25°. The excavating shovel transition tooth 37 is installed behind the excavating shovel 36 to prevent angelica roots and soil clods from getting stuck or accumulating at the excavating shovel outlet, ensuring smooth material feeding.

[0036] The traction suspension and contour-following travel device consists of a hydraulic cylinder 38, a three-point suspension device 39, a suspension frame 40, and a ground wheel 41. The three-point suspension device 39 is located at the front of the frame and is used to connect with the tractor; the hydraulic cylinder 38 is hinged to the suspension frame 40 and is used to adjust the attitude of the frame relative to the ground. The maximum stroke of the cylinder is 200mm. When the machine is in the default stationary state, the distance from the highest point of the three-point suspension to the tip of the shovel is 1590mm; the ground wheel 41 is located at the lower part of the frame and is used to support the frame and control the working depth.

[0037] The primary root-soil separation device consists of guide wheel a42, support wheel 43, grid a44, drive chain a45, sprocket a46, front chain plate drive shaft 47, and front chain plate side plate 48. The device has a total length of 1590mm and is inclined at the front and rear along the material conveying direction, with an angle of 36.8° to the horizontal plane. Grid a44 and drive chain a45 are fixed together to form an lifting chain. The lifting chain is powered by sprocket b9, which rotates at 249 r / min. Sprocket b9 and sprocket a46 are both located on the front chain plate drive shaft 47. Guide wheel a42 is installed at the front end of the primary root-soil separation device to control the running trajectory and tension of the lifting chain; support wheel 43 is installed on the front chain plate side plate 48 to prevent the lifting chain from sagging.

[0038] The secondary root and soil separation device consists of a guide wheel b49, a drive chain b50, a grid b51, a vibrating wheel 52, a swivel wheel b53, a rear chain drive shaft 54, and a soil-shaking roller shaft 55. The device has a total length of 1110 mm and is arranged at an angle of 23° to the horizontal along the material conveying direction, with the front lower than the rear. The grid b51 and drive chain b50 are fixed together to form an lifting chain. The lifting chain is powered by a sprocket l27, which rotates at 206 r / min. The sprocket l27 and swivel wheel b53 are both located on the rear chain drive shaft 54. The guide wheel b49 is installed at the front end of the secondary root and soil separation device. The vibrating wheel 52 is installed on the soil-shaking roller shaft 55 and is powered by a sprocket m30. The vibrating wheel 52 works in conjunction with the lifting chain to generate periodic vibrations during operation.

[0039] The soil-crushing device consists of a soil-pressing roller 33, an adjusting screw 34, a soil-crushing toothed rod 56, and a drive shaft 57. The soil-pressing roller 33 and the soil-crushing toothed rod 56 are fixed together to form a soil-crushing roller. The soil-crushing roller is positioned above the corresponding root-soil separation device, and an adjustable gap is formed between the soil-crushing roller and the corresponding root-soil separation device, with a minimum gap of 80mm. The soil-crushing roller positioned above the primary root-soil separation device is powered by a sprocket f17, and the soil-crushing roller positioned above the secondary root-soil separation device is powered by a sprocket h21. The gap between the soil-crushing roller and the corresponding root-soil separation device is adjusted by the adjusting screw 34 to break up the heavy, sticky soil clumps attached to the roots of Angelica dahurica.

[0040] The throwing and cleaning device consists of a transition roller shaft 58, a support disc 59, and cleaning grid bars 60. The spacing between adjacent cleaning grid bars 60 is 88 mm. The throwing and cleaning device is installed at the rear end of the frame. The support disc 59 and the cleaning grid bars 60 are fixed together to form a throwing and cleaning roller, which is powered by a sprocket n32. The throwing and cleaning roller has a diameter of 250 mm to achieve the throwing and cleaning separation of Angelica dahurica root blocks.

[0041] In this embodiment, the harvester has a working width of 1600mm, a total weight of 1100kg, and a power requirement of 180 horsepower or above.

[0042] In actual operation, the angle of the three-point suspension device 39 is first adjusted by the hydraulic cylinder 38. The tractor pulls the three-point suspension device 39 in the traction suspension and contour-following travel device, and transmits power to the power input shaft 2 of the gearbox, which in turn drives the drive shaft a5, drive shaft b6, sprocket a7, sprocket b9, sprocket c10, sprocket d12, gear a13, gear b14, sprocket e15, sprocket f17, gear c18, sprocket g19, sprocket h21, sprocket i22, sprocket j24, sprocket k25, sprocket l27, double sprocket 28, sprocket m30, and sprocket n32 to rotate. During this process, the excavating shovel 36 excavates the Angelica dahurica rhizome along with the surrounding soil as a whole, and smoothly guides the mixture of Angelica dahurica root, soil, and chopped straw into the subsequent conveying and separation system. The mixture first enters the primary root-soil separation device, which consists of grid bars a44 and a drive chain a45. The chain movement, combined with shaking, causes fine soil to leak through the gaps in the grid bars, completing the first round of soil removal. Addressing the issues of heavy clay soil's tendency to clump, strong adhesion, and clogging, the soil-breaking devices above the primary and secondary screening stages break up large clods and reduce soil adhesion. The material then enters the secondary root-soil separation device, where the periodic vibration of the shaking wheel 52 completes a second round of deep soil removal. Finally, the throwing and cleaning device at the rear of the machine cleanly diverts the separated angelica rhizomes and guides them to the collection point.

[0043] Working principle

[0044] The working principle of this invention is as follows: First, the angle of the three-point suspension device 39 is adjusted by the hydraulic cylinder 38. The tractor pulls the three-point suspension device 39 in the traction suspension and contour walking device, and transmits power to the power input shaft 2 of the gearbox, which in turn drives each transmission component to rotate. During this process, the excavating shovel 36 digs up the Angelica dahurica rhizome along with the surrounding soil as a whole, and smoothly guides the mixture of Angelica dahurica root, soil and chopped straw into the subsequent conveying and separation system. The mixture first enters the primary root-soil separation device, where the chain movement combined with shaking causes the fine soil to leak through the gaps in the grid, completing the first round of soil removal. To address the problems of heavy clay soil being prone to clumping, strong adhesion, and clogging, a soil breaking device is set between the primary and secondary screening to break up large soil clods and reduce soil adhesion. Subsequently, the material enters the secondary root-soil separation device, where the periodic vibration of the shaking wheel completes a second round of deep soil removal. Finally, the throwing and cleaning device at the rear of the machine cleanly diverts the separated Angelica dahurica rhizome and guides it to the collection position.

[0045] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A tractor-mounted Angelica dahurica harvester, characterized in that, It includes a frame, transmission device, root block excavation device, traction suspension and contour walking device, primary root soil separation device, secondary root soil separation device, soil crushing device, and throwing and cleaning device; The traction suspension adjustment device is located at the front of the frame and is used to connect with the tractor and adjust the working posture of the frame; The root clod excavation device is located at the lower front of the frame and is used to dig up the Angelica dahurica root and the surrounding soil and transport them backward. The primary root-soil separation device is located behind the root clod excavation device and is used to perform preliminary screening of the Angelica dahurica root and soil mixture. The secondary root-soil separation device is located below and behind the primary root-soil separation device and is connected to the discharge end of the primary root-soil separation device for secondary root-soil separation of the Angelica dahurica root. The soil crushing device includes soil crushing components respectively set above the primary and secondary root-soil separation devices for crushing the adhering soil clods formed during the screening process. The throwing and cleaning device is located at the rear end of the secondary root-soil separation device for further soil removal of the Angelica dahurica root and throwing it backward for discharge. The transmission device is connected to the power output end of the tractor and transmits power to the primary root-soil separation device, the secondary root-soil separation device, the soil crushing device, and the throwing and cleaning device.

2. The towed Angelica dahurica harvester according to claim 1, characterized in that: The transmission device includes a gearbox (1), a gearbox power input shaft (2), a gearbox output shaft a (3), a gearbox output shaft b (4), a drive shaft a (5), a drive shaft b (6), a sprocket a (7), a drive chain a (8), a sprocket b (9), a sprocket c (10), a drive chain b (11), a sprocket d (12), a gear a (13), a gear b (14), a sprocket e (15), a drive chain c (16), a sprocket f (17), a gear c (18), a sprocket g (19), a drive chain d (20), a sprocket h (21), a sprocket i (22), a drive chain e (23), a sprocket j (24), a sprocket k (25), and a drive chain f (26). 26), sprocket l (27), double sprocket (28), drive chain g (29), sprocket m (30), drive chain h (31), sprocket n (32), the gearbox (1) is mounted on the upper part of the frame; the gearbox power input shaft (2) is connected to the tractor PTO through a universal joint; the gearbox output shaft a (3) is connected to one end of the drive shaft a (5), and the other end of the drive shaft a (5) is provided with a sprocket a (7), the sprocket a (7) is connected to the sprocket b (9) through the drive chain a (8), the sprocket b (9) is coaxially mounted with the sprocket c (10), the sprocket c (10) is connected to the sprocket d (12) through the drive chain b (11), and the sprocket d (12) is coaxially mounted with the gear a (13). The shaft is installed, and gear a (13) meshes with gear b (14) on one side. Gear b (14) is coaxially installed with sprocket e (15). Sprocket e (15) is connected to sprocket f (17) through transmission chain c (16). Sprocket f (17) provides power to the soil crushing device set above the primary root soil separation device. Gear a (13) meshes with gear c (18) on the other side. Gear c (18) is coaxially installed with sprocket g (19). Sprocket g (19) is connected to sprocket h (21) through transmission chain d (20). Sprocket h (21) provides power to the soil crushing device set above the secondary root soil separation device. The gearbox output shaft b (4) is connected to one end of the transmission shaft b (6). The other end of the drive shaft b (6) is provided with a sprocket i (22). Sprocket i (22) is connected to sprocket j (24) through drive chain e (23). Sprocket j (24) is coaxially installed with sprocket k (25). Sprocket k (25) is connected to sprocket l (27) through drive chain f (26). Sprocket l (27) is coaxially installed with double sprockets (28). One of the sprockets in the double sprockets (28) is connected to sprocket m (30) through drive chain g (29). Sprocket m (30) provides power to the shaking wheel of the secondary root soil separation device. The other sprocket in the double sprockets (28) is connected to sprocket n (32) through drive chain h (31). Sprocket n (32) provides power to the throwing and cleaning device.

3. The towed angelica harvester according to claim 1, characterized in that: The root block excavation device consists of an excavation shovel (36) and an excavation shovel transition tooth (37). The excavation shovel (36) is fixed at the front end of the frame. The soil entry end of the excavation shovel (36) is set as a sawtooth structure, which is composed of multiple teeth arranged at equal intervals, and the included angle of each tooth is 46°. The excavation shovel (36) is installed at the front end of the frame through an angle adjustment connection structure to adjust its soil entry angle. The transition tooth (37) of the excavator is installed behind the excavator (36) to prevent the roots of Angelica dahurica and soil clods from getting stuck and accumulating at the exit of the excavator.

4. A tractor-mounted Angelica dahurica harvester according to claim 1, characterized in that: The traction suspension and contour-following walking device consists of a hydraulic cylinder (38), a three-point suspension device (39), a suspension (40), and a ground wheel (41). The three-point suspension device (39) is located at the front of the frame and is used to connect with the tractor. The hydraulic cylinder (38) is hinged to the suspension (40) and is used to adjust the attitude of the frame relative to the ground. The ground wheel (41) is located at the bottom of the frame and is used to support the frame and control the working depth.

5. A tractor-mounted Angelica dahurica harvester according to claim 1, characterized in that: The primary root-soil separation device consists of a guide wheel a (42), a support wheel (43), a grid bar a (44), a transmission chain a (45), a swivel wheel a (46), a front chain plate transmission shaft (47), and a front chain plate side plate (48). The grid bar a (44) and the transmission chain a (45) are fixed together to form an lifting chain, which is used to receive the mixture from the root block excavation device and complete the initial soil screening. The power of the lifting chain comes from the sprocket b (9), which is on the front chain plate transmission shaft (47) along with the swivel wheel a (46). The guide wheel a (42) is installed at the front end of the primary root-soil separation device to control the running trajectory and tension of the lifting chain. The support wheel (43) is installed on the front chain plate side plate (48) to prevent the lifting chain from sagging.

6. A tractor-mounted Angelica dahurica harvester according to claim 1, characterized in that: The secondary root-soil separation device consists of a guide wheel b (49), a transmission chain b (50), a grid bar b (51), a vibrating wheel (52), a sprocket wheel b (53), a rear chain plate transmission shaft (54), and a soil-shaking roller shaft (55). The grid bar b (51) and the transmission chain b (50) are fixed together to form a lifting chain. The power of the lifting chain comes from the sprocket l (27), and the sprocket l (27) and the sprocket wheel b (53) are both on the rear chain plate transmission shaft (54). The guide wheel b (49) is installed at the front end of the secondary root-soil separation device. The vibrating wheel (52) is installed on the soil-shaking roller shaft (55), and the power comes from the sprocket m (30). The vibrating wheel (52) cooperates with the lifting chain to make the lifting chain generate periodic vibration during operation.

7. A tractor-mounted Angelica dahurica harvester according to claim 1, characterized in that: The soil-crushing device consists of a soil-pressing roller (33), an adjusting screw (34), a soil-crushing toothed rod (56), and a drive shaft (57). The soil-pressing roller (33) and the soil-crushing toothed rod (56) are fixed together to form a soil-crushing roller. The soil-crushing roller is set above the corresponding root-soil separation device, and an adjustable gap is formed between the soil-crushing roller and the corresponding root-soil separation device. The power of the soil-crushing roller set above the primary root-soil separation device comes from the sprocket f (17), and the power of the soil-crushing roller set above the secondary root-soil separation device comes from the sprocket h (21). The gap between the soil-crushing roller and the corresponding root-soil separation device is adjusted by adjusting the screw (34) to break up the sticky soil clumps attached to the roots of Angelica dahurica.

8. A tractor-mounted Angelica dahurica harvester according to claim 1, characterized in that: The throwing and cleaning device consists of a transition roller shaft (58), a support disc (59), and a cleaning grid (60); the throwing and cleaning device is installed at the rear end of the frame; the support disc (59) and the cleaning grid (60) are fixed together to form a throwing and cleaning roller, and the power of the throwing and cleaning roller comes from the sprocket n (32).

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