Gearbox and rhizome medicinal material harvester with variable angle and rotating speed
By incorporating a gearbox and a design that allows for variable angles and rotation speeds, the problems of fixed insertion depth of the shovel and the inability to adjust the mesh belt conveyor in root and rhizome medicinal herb harvesters have been solved, thus achieving efficient harvesting and a high net yield of medicinal herbs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-27
AI Technical Summary
In existing harvesters for rhizomes and medicinal herbs, the fixed insertion depth of the digging shovel leads to high resistance and difficulty in harvesting. The herbs also carry a large amount of soil. Furthermore, the speed and angle of the mesh belt conveyor cannot be adjusted, resulting in low harvesting efficiency and the need for secondary screening, which increases labor intensity.
Design a root and rhizome harvester with a gearbox and variable angle and speed. The gearbox enables the vibrating digging of the herb and the speed and angle adjustment of the mesh belt conveyor. Combined with the adjustable angles of the intermediate and tail frames, the harvesting of medicinal materials can be achieved efficiently.
It improves the efficiency and cleanliness of medicinal herb harvesting, reduces the need for secondary screening, lowers labor intensity, and meets the harvesting needs of root and rhizome medicinal herbs at different depths.
Smart Images
Figure CN224037926U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a root-stemmed medicinal material harvesting machine with variable angle and speed. BACKGROUND
[0002] The root-stemmed medicinal material harvesting machine mainly comprises a main frame, a digging shovel fixed at the front end of the main frame, and a net-belt conveyor installed on the main frame. A traction frame connected with a tractor and a gearbox connected with the power output shaft of the tractor are fixed on the main frame. The power output by the tractor is transmitted to the net-belt conveyor through the gearbox after being reversed, thereby driving the net-belt conveyor to rotate. Since the planting depths of different types of root-stemmed medicinal materials are different, the tractor adjusts the depth of the digging shovel inserted into the soil by pressing down the traction frame during harvesting, thereby meeting the harvesting requirements of root-stemmed medicinal materials with different depths. However, since the digging shovel has a fixed structure, the greater the depth of the digging shovel inserted, the greater the resistance, resulting in difficulty in harvesting. Moreover, as the depth of insertion increases, the amount of soil carried by the medicinal materials also increases, while the speed and angle of the net-belt conveyor are fixed, and the screening speed and efficiency of the net-belt conveyor cannot be adjusted, leading to lower net recovery rate of the harvested medicinal materials with greater depth, and the need for secondary screening treatment, thereby increasing the labor intensity of harvesting medicinal materials. SUMMARY
[0003] The first object of the utility model is to provide a gearbox.
[0004] The second object of the utility model is to provide a root-stemmed medicinal material harvesting machine with variable angle and speed.
[0005] The first object of the utility model is implemented by the following technical scheme: a gearbox, which comprises a box body, an input shaft, a transmission shaft, an intermediate shaft, a speed regulating shaft, a first output shaft, a second variable speed output shaft and a speed regulating drive, the input shaft is arranged transversely on the front end of the box body, the transmission shaft, the intermediate shaft, the speed regulating shaft, the first output shaft and the second variable speed output shaft are arranged transversely and vertically on the inside of the box body, the end of the first output shaft and the end of the second variable speed output shaft are arranged outside the box body, the output end of the input shaft is connected with the transmission shaft through a bevel gear, the transmission shaft is connected with the intermediate shaft and the speed regulating shaft through a gear transmission, the intermediate shaft is connected with the first output shaft through a gear transmission, the first speed regulating gear, the second speed regulating gear, the third speed regulating gear and the fourth speed regulating gear are arranged on the speed regulating shaft in sequence, the first double gear and the second double gear are connected with the second variable speed output shaft through a spline, the first double gear and the second double gear can slide along the axial direction of the second variable speed output shaft, the first double gear is located between the first speed regulating gear and the second speed regulating gear, the two gears of the first double gear are movably engaged with the first speed regulating gear and the second speed regulating gear respectively, the second double gear is located between the third speed regulating gear and the fourth speed regulating gear, the two gears of the second double gear are movably engaged with the third speed regulating gear and the fourth speed regulating gear respectively, the speed regulating drive is arranged on the top of the box body and drives the first double gear and the second double gear to slide along the axial direction of the speed regulating shaft.
[0006] Further, the speed regulating drive comprises a fixed rod, a shift fork and a shift fork drive, the fixed rod is arranged along the axial direction of the second variable speed output shaft on the top of the box body, the shift fork is slidably arranged on the fixed rod, the bottom end of the shift fork is arranged between the two gears of the corresponding first double gear or second double gear, the shift fork drive is arranged on the box body and drives the shift fork to slide along the fixed rod.
[0007] The first object of the utility model is implemented by the following technical scheme: a rhizome medicinal material harvester with variable angle and rotating speed, which comprises a digging shovel, a main frame, an intermediate frame and a tail frame arranged in sequence from front to back, the front end bottom of the main frame is hinged to the rear end bottom of the digging shovel, the rear end bottom of the main frame is hinged to the front end bottom of the intermediate frame, and the rear end bottom of the intermediate frame is hinged to the front end bottom of the tail frame; a traction frame and a gearbox are fixed to the top of the main frame, the input shaft of the gearbox is in transmission connection with the power output shaft of a tractor, an eccentric wheel is fixed to the first output shaft of the gearbox, and a connecting rod is hinged between the eccentric shaft of the eccentric wheel and the rear end top of the digging shovel; a suspension frame is fixed to the main frame, and an intermediate adjusting telescopic rod and a tail adjusting telescopic rod are respectively hinged between the suspension frame and the top of the intermediate frame and the top of the tail frame; a first mesh belt conveyor is installed on the intermediate frame, and a second mesh belt conveyor is installed on the tail frame, and the second speed output shaft of the gearbox is in transmission connection with the first mesh belt conveyor and the second mesh belt conveyor.
[0008] Further, a digging shovel tail plate is fixed to the rear end bottom of the digging shovel, and the rear end of the digging shovel tail plate is arranged above the first mesh belt conveyor.
[0009] Further, the feeding end roller shaft of the first mesh belt conveyor is coaxially arranged with the hinge shaft between the intermediate frame and the main frame, and the feeding end roller shaft of the second mesh belt conveyor is coaxially arranged with the hinge shaft between the tail frame and the intermediate frame.
[0010] Further, the second speed output shaft is in chain transmission connection with the discharging end roller shaft of the first mesh belt conveyor, a tensioning mechanism for tensioning the chain is installed on the main frame, and the discharging end roller shaft of the first mesh belt conveyor is in transmission connection with the feeding end roller shaft of the second mesh belt conveyor.
[0011] Further, the tensioning mechanism comprises a support, a connecting frame, a spring and a tensioning wheel, the top end of the support is fixedly connected with the main frame, the bottom end of the support is hinged to the middle part of the connecting frame, the tensioning wheel is rotatably arranged at the two ends of the connecting frame and engaged with the inner side and the outer side of the chain, and the spring is arranged between the support and the connecting frame.
[0012] Further, at least one cage roller is rotatably arranged on the tail frame behind the discharging end roller shaft of the second mesh belt conveyor.
[0013] Further, the discharging end roller shaft of the second mesh belt conveyor is in transmission connection with the cage roller.
[0014] The utility model discloses a tractor power output shaft transmission power comes in the gearbox after the input shaft, first through the transmission shaft realizes the direction change, and then power transmission to the first output shaft and the speed regulation shaft respectively, and the first output shaft can drive the medicine shovel vibration medicine digging through the eccentric wheel and the connecting rod, and the speed regulation drive is through the second speed change output shaft and is connected with the first to fourth speed regulation gear on the speed regulation shaft through the different gear on the first double -housed gear and the second double -housed gear, can realize four gear change of the second speed change output shaft, then through the second speed change output shaft drive the mesh belt conveyor of medicine harvester operation, can reach the purpose of adjusting screening efficiency. And, the angle of the middle frame and the tail frame of medicine harvester is adjustable, realizes the mesh belt conveyor inclination angle adjustable, further reaches the purpose of adjusting screening efficiency. In short, the medicine shovel of the medicine harvester can realize vibration medicine digging, and the speed and inclination angle of the mesh belt conveyor can be adjusted, can satisfy the harvesting demand of different depth rootstock class medicine, helps to improve the medicine collection rate. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is the whole structure schematic drawing of example 1.
[0016] Figure 2 It is the A-A section view of Figure 1 .
[0017] Figure 3 It is the B-B section view of Figure 1 .
[0018] Figure 4 It is the C-C section view of Figure 1 .
[0019] Figure 5 It is the whole structure schematic drawing of example 2.
[0020] Figure 6 It is the structure schematic drawing of tensioning mechanism.
[0021] Box 1, input shaft 2, transmission shaft 3, speed regulation shaft 4, first output shaft 5, second speed change output shaft 6, speed regulation drive 7, fixed rod 71, shift fork 72, shift fork drive 73, first speed regulation gear 8, second speed regulation gear 9, third speed regulation gear 10, fourth speed regulation gear 11, first double -housed gear 12, second double -housed gear 13, medicine shovel 15, main frame 16, middle frame 17, tail frame 18, traction frame 19, eccentric wheel 20, connecting rod 21, suspension frame 22, middle adjustment telescopic rod 23, tail adjustment telescopic rod 24, first mesh belt conveyor 25, second mesh belt conveyor 26, medicine shovel tail plate 27, tensioning mechanism 28, support 281, connecting frame 283, spring 284, tensioning wheel 285, cage type roller 29, middle shaft 30. DETAILED DESCRIPTION:
[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] Example 1: As Figures 1 to 4 As shown, a gearbox includes a housing 1, an input shaft 2, a drive shaft 3, an intermediate shaft 30, a speed regulating shaft 4, a first output shaft 5, a second speed-changing output shaft 6, and a speed-regulating drive 7. The input shaft 2 is rotatably arranged laterally at the front end of the housing 1. Inside the housing 1, the drive shaft 3, intermediate shaft 30, speed regulating shaft 4, first output shaft 5, and second speed-changing output shaft 6 are rotatably arranged laterally and perpendicular to the input shaft 2. The ends of the first output shaft 5 and the second speed-changing output shaft 6 both extend outside the housing 1. The output end of the input shaft 2 is connected to the drive shaft 3 via a bevel gear. The drive shaft 3 is connected to the intermediate shaft 30 and the speed regulating shaft 4 via gear drives. The intermediate shaft 30 is connected to the first output shaft 5 via a gear drive. A first speed regulating gear 8 and a second speed regulating gear 9 are rotatably arranged sequentially on the speed regulating shaft 4. The gearbox 1 includes a third speed regulating gear 10 and a fourth speed regulating gear 11. A first double gear 12 and a second double gear 13 are splined on the second speed output shaft 6. Both the first double gear 12 and the second double gear 13 can slide along the axial direction of the second speed output shaft 6. The first double gear 12 is located between the first speed regulating gear 8 and the second speed regulating gear 9, and its two gears are movably meshed with the first speed regulating gear 8 and the second speed regulating gear 9, respectively. The second double gear 13 is located between the third speed regulating gear 10 and the fourth speed regulating gear 11, and its two gears are movably meshed with the third speed regulating gear 10 and the fourth speed regulating gear 11, respectively. A speed regulating drive 7 is provided on the top of the housing 1 to drive the first double gear 12 and the second double gear 13 to slide along the axial direction of the speed regulating shaft 4.
[0024] The speed regulating drive 7 comprises a fixed rod 71, a shift fork 72 and a shift fork drive 73. The fixed rod 71 is arranged along the axis of the second speed change output shaft 6 at the top of the box body 1. The shift fork 72 is slidably arranged on the fixed rod 71. The bottom end of the shift fork 72 is arranged between the two gears of the corresponding first double gear 12 or second double gear 13. The shift fork drive 73 is arranged on the box body 1 to drive the shift fork 72 to slide along the fixed rod 71. The shift fork drive 73 is a pneumatic cylinder, an oil cylinder, an electric push rod or a mechanical shift rod. In the embodiment, the shift fork drive 73 is an oil cylinder.
[0025] In the embodiment, the input shaft 2 is connected to the power output shaft of the tractor. The power input from the power output shaft of the tractor drives the transmission shaft 3 through the bevel gear. The transmission shaft 3 drives the intermediate shaft 30 and the speed regulating shaft 4 to rotate, respectively. The intermediate shaft 30 can transmit power to the first output shaft 5. The first output shaft 5 can drive the medicine harvesting machine through the eccentric wheel and the connecting rod mechanism.
[0026] In the embodiment, the input shaft 2 is connected to the power output shaft of the tractor. The power input from the power output shaft of the tractor drives the transmission shaft 3 through the bevel gear. The transmission shaft 3 drives the intermediate shaft 30 and the speed regulating shaft 4 to rotate, respectively. The intermediate shaft 30 can transmit power to the first output shaft 5. The first output shaft 5 can drive the medicine harvesting machine through the eccentric wheel and the connecting rod mechanism. Figure 5 and Figure 6 As shown in FIGS. 1 to 4, a root rhizome medicine harvester with variable angle and speed comprises a medicine digging shovel 15, a main frame 16, an intermediate frame 17 and a tail frame 18 arranged in sequence from front to back. The front end bottom of the main frame 16 is hingedly connected to the rear end bottom of the medicine digging shovel 15. The rear end bottom of the main frame 16 is hingedly connected to the front end bottom of the intermediate frame 17. The rear end bottom of the intermediate frame 17 is hingedly connected to the front end bottom of the tail frame 18. A traction frame 19 and a speed change box as shown in Embodiment 1 are fixed on the top of the main frame 16. The whole harvester is hung on the rear end of the tractor through the traction frame 19. The input shaft 2 of the speed change box is drivingly connected to the power output shaft of the tractor. An eccentric wheel 20 is fixed on the first output shaft 5 of the speed change box. A connecting rod 21 is hingedly connected between the eccentric shaft of the eccentric wheel 20 and the rear end top of the medicine digging shovel 15. When harvesting medicine, the tractor can press the medicine digging shovel 15 into the soil by applying downward pressure to the traction frame 19. Then, the power output shaft of the tractor transmits power to the speed change box. The first output shaft 5 of the speed change box drives the connecting rod 21 to swing through the eccentric wheel 20, thereby driving the medicine digging shovel 15 to vibrate. When the tractor pulls the whole harvester to move, the medicine digging shovel 15 can realize the effect of vibrating digging, thereby reducing the digging resistance and improving the harvesting efficiency.
[0027] The main frame 16 is fixed with a suspension frame 22, and an intermediate adjusting telescopic rod 23 and a tail adjusting telescopic rod 24 are respectively hinged between the suspension frame 22 and the top of the intermediate frame 17 and the top of the tail frame 18, and the intermediate adjusting telescopic rod 23 and the tail adjusting telescopic rod 24 in the embodiment are both oil cylinders; a first mesh belt conveyor 25 is installed on the intermediate frame 17, and a digging shovel tail plate 27 is fixed at the bottom of the rear end of the digging shovel 15, and the rear end of the digging shovel tail plate 27 is arranged above the first mesh belt conveyor 25; the digging shovel tail plate 27 plays a transition role. A second mesh belt conveyor 26 is installed on the tail frame 18, and the second speed output shaft 6 of the gearbox is in driving connection with the first mesh belt conveyor 25 and the second mesh belt conveyor 26. The feeding end roller shaft of the first mesh belt conveyor 25 is coaxially arranged with the hinge shaft between the intermediate frame 17 and the main frame 16; the feeding end roller shaft of the second mesh belt conveyor 26 is coaxially arranged with the hinge shaft between the tail frame 18 and the intermediate frame 17. The second speed output shaft 6 is in chain transmission connection with the discharging end roller shaft of the first mesh belt conveyor 25, and a tensioning mechanism 28 for tensioning the chain is installed on the main frame 16; the tensioning mechanism 28 comprises a bracket 281, a connecting frame 283, a spring 284 and a tensioning wheel 285, the top end of the bracket 281 is fixedly connected with the main frame 16, the bottom end of the bracket 281 is hingedly connected with the middle part of the connecting frame 283, the tensioning wheel 285 meshing with the inner side and the outer side of the chain is respectively arranged at both ends of the connecting frame 283, and the spring 284 is arranged between the bracket 281 and the connecting frame 283. The two tensioning wheels 285 are rotationally connected through the connecting frame 283 and the bracket 281, and in the process of rotating the intermediate frame 17 around the main frame 16, the spring 284 plays a tensioning role, thereby realizing stable transmission of power between the second speed output shaft 6 and the first mesh belt conveyor 25.
[0028] The discharging end roller shaft of the first mesh belt conveyor 25 is in driving connection with the feeding end roller shaft of the second mesh belt conveyor 26. When the tail frame 18 rotates relative to the intermediate frame 17, the feeding end roller shaft of the second mesh belt conveyor 26 and the discharging end roller shaft of the first mesh belt conveyor 25 will not move relatively, and stable transmission of power between the two can be realized.
[0029] The second transmission output shaft 6 of the gearbox can drive the first mesh belt conveyor 25 and the second mesh belt conveyor 26 to operate, and the medicinal materials and soil dug out by the digging shovel 15 are transmitted backward and then screened by the first mesh belt conveyor 25 and the second mesh belt conveyor 26, so that the soil and the medicinal materials are separated; and the speed of the second transmission output shaft 6 can be adjusted by the gearbox, so as to adjust the screening efficiency of the first and second mesh belt conveyors. In addition, the angles of the middle rack 17 and the tail rack 18 can be adjusted by the extension and retraction of the middle adjusting telescopic rod 23 and the tail adjusting telescopic rod 24, so as to adjust the angles of the first and second mesh belt conveyors, and further achieve the purpose of adjusting the screening efficiency.
[0030] The tail rack 18 behind the discharge end roller shaft of the second mesh belt conveyor 26 is provided with at least one cage drum 29, and the discharge end roller shaft of the second mesh belt conveyor 26 is in transmission connection with the cage drum 29. In the embodiment, two cage drums 29 are provided, and the two cage drums 29 are in transmission with each other through a chain. The wheel drum 29 is driven to rotate by the second mesh belt conveyor 26 during operation. The medicinal materials discharged from the discharge end of the second mesh belt conveyor 26 collide with the rotating wheel drum 29, so that the soil attached to the medicinal materials can be knocked off, and the medicinal materials can be thrown backward, so that the separation of the medicinal materials and the soil is more thorough, and the net recovery rate is further improved.
[0031] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A gearbox, characterized in that It includes box, input shaft, transmission shaft, intermediate shaft, speed regulation shaft, first output shaft, second variable speed output shaft and speed regulation drive, the input shaft is arranged transversely at the front end of the box, the transmission shaft, the intermediate shaft, the speed regulation shaft, the first output shaft and the second variable speed output shaft are arranged transversely and vertically relative to the input shaft inside the box, the end of the first output shaft and the end of the second variable speed output shaft are arranged outside the box, the output end of the input shaft is driven by bevel gears, the transmission shaft is connected with the intermediate shaft and the speed regulation shaft by gears, the intermediate shaft is connected with the first output shaft by gears, the first speed regulation gear, the second speed regulation gear, the third speed regulation gear and the fourth speed regulation gear are arranged on the speed regulation shaft in sequence, the first double gear and the second double gear are connected with the second variable speed output shaft by spline, the first double gear and the second double gear can slide along the axial direction of the second variable speed output shaft, the first double gear is located between the first speed regulation gear and the second speed regulation gear, the two gears of the first double gear are in mesh with the first speed regulation gear and the second speed regulation gear, the second double gear is located between the third speed regulation gear and the fourth speed regulation gear, the two gears of the second double gear are in mesh with the third speed regulation gear and the fourth speed regulation gear, the speed regulation drive is arranged on the top of the box to drive the first double gear and the second double gear to slide along the axial direction of the speed regulation shaft.
2. A gearbox according to claim 1, characterised in that The speed regulation drive includes fixed rod, fork and fork drive, the fixed rod is arranged along the axial direction of the second variable speed output shaft on the top of the box, the fork is arranged on the fixed rod to slide, the bottom end of the fork is arranged between the two gears of the corresponding first double gear or second double gear, the fork drive is arranged on the box to drive the fork to slide along the fixed rod.
3. A variable angle and rotational speed rhizome medicinal herb harvester, characterized in that, It includes by front to back in turn setting up to dig medicine shovel, mainframe, intermediate frame and tail frame, the front end bottom of mainframe is hinged with the rear end bottom of dig medicine shovel, the rear end bottom of mainframe is hinged with the front end bottom of intermediate frame, the rear end bottom of intermediate frame is hinged with the front end bottom of tail frame, the top of mainframe is fixed with traction frame and gearbox, the gearbox includes box, input shaft, transmission shaft, intermediate shaft, speed regulation shaft, first output shaft, second variable speed output shaft and speed regulation drive, the front end of box is rotatably provided with the input shaft arranged transversely, the inside of box is rotatably provided with the transmission shaft, the intermediate shaft, the speed regulation shaft, the first output shaft and the second variable speed output shaft arranged transversely and perpendicularly to the input shaft, the end of the first output shaft and the end of the second variable speed output shaft are both outside the box, the output end of the input shaft is driven by bevel gear, the transmission shaft is driven by gear respectively, the intermediate shaft is driven by gear, the first output shaft is driven by gear, the second variable speed output shaft is driven by gear, the first speed regulation gear, the second speed regulation gear, the third speed regulation gear and the fourth speed regulation gear are rotatably provided on the speed regulation shaft in turn, the first double gear and the second double gear are connected to the second variable speed output shaft by spline, the first double gear and the second double gear can slide along the axial direction of the second variable speed output shaft, the first double gear is located between the first speed regulation gear and the second speed regulation gear, the two gears of the first double gear are in mesh with the first speed regulation gear and the second speed regulation gear respectively, the second double gear is located between the third speed regulation gear and the fourth speed regulation gear, the two gears of the second double gear are in mesh with the third speed regulation gear and the fourth speed regulation gear respectively, the speed regulation drive is arranged on the top of the box to drive the first double gear and the second double gear to slide along the axial direction of the speed regulation shaft, the speed regulation drive includes fixed rod, shift fork and shift fork drive, the fixed rod is arranged along the axial direction of the second variable speed output shaft, the shift fork is slidably arranged on the fixed rod, the bottom end of the shift fork is arranged between the two gears of the corresponding first double gear or second double gear, the shift fork drive is arranged on the box to drive the shift fork to slide along the fixed rod, the input shaft of the gearbox is driven by the power output shaft of the tractor, the eccentric wheel is fixed on the first output shaft of the gearbox, the connecting rod is hinged between the eccentric shaft of the eccentric wheel and the top of the rear end of the dig medicine shovel, the suspension frame is fixed on the mainframe, the intermediate adjusting telescopic rod and the tail adjusting telescopic rod are hinged between the top of the intermediate frame and the top of the tail frame respectively.The first mesh belt conveyor is installed on the intermediate frame, the second mesh belt conveyor is installed on the tail frame, and the second transmission output shaft of the gearbox is in transmission connection with the first mesh belt conveyor and the second mesh belt conveyor.
4. The rhizome harvesting machine of claim 3, wherein, The digging shovel tail plate is fixed at the bottom of the rear end of the digging shovel, the rear end of the digging shovel tail plate is arranged above the first net belt conveyor.
5. The rhizome harvesting machine of variable angle and speed according to claim 3, wherein, The feeding end roller shaft of the first net belt conveyor is coaxially arranged with the hinge shaft between the intermediate frame and the main frame, the feeding end roller shaft of the second net belt conveyor is coaxially arranged with the hinge shaft between the tail frame and the intermediate frame.
6. The rhizome harvesting machine of variable angle and speed according to claim 5, wherein, The second variable speed output shaft is connected with the discharging end roller shaft of the first net belt conveyor by chain transmission, the tensioning mechanism is arranged on the main frame to tension the chain, the discharging end roller shaft of the first net belt conveyor is connected with the feeding end roller shaft of the second net belt conveyor by transmission.
7. The rhizome harvesting machine of variable angle and speed according to claim 6, wherein, The tensioning mechanism comprises a support, a connecting frame, a spring and a tensioning wheel, the top end of the support is fixedly connected with the main frame, the bottom end of the support is hingedly connected with the middle part of the connecting frame, the tensioning wheels meshing with the inner side and the outer side of the chain are respectively arranged at the two ends of the connecting frame, and the spring is arranged between the support and the connecting frame.
8. The rhizome harvesting machine of variable angle and speed according to any one of claims 3 to 6, characterized in that, At least one cage roller is rotatably arranged on the tail frame behind the discharge end roller shaft of the second mesh belt conveyor.
9. The rhizome harvesting machine of variable angle and speed according to claim 8, wherein, The discharge end roller shaft of the second mesh belt conveyor is in transmission connection with the cage roller.