A clamping double-row taro harvesting device

Abstract

The present application relates to the technical field of crop harvesting, and particularly relates to a clamping type double-row taro harvesting device, which comprises a rack, a moving wheel, a suspension frame, a clamping harvesting mechanism, a front cutting mechanism, a rear cutting mechanism and an adjusting mechanism; the present application can solve the following problems existing in the process of harvesting taros in the prior art: the taros may be damaged when a digging shovel is used to dig taros, affecting the quality, appearance and selling price of the taros; the stems cannot be removed, and the stems of the stacked taros may be intertwined, thereby affecting the harvesting efficiency of the taros; the present application clamps the taro stems by means of a chain cooperating with a clamping plate and pulls the taros out of the soil, without applying rigid resistance to the taros during the process, so as to avoid damage to the taros, thereby ensuring the quality and appearance of the taros; the present application can quickly cut off the stems, can prevent the taros from being intertwined during harvesting to affect the harvesting efficiency, and can cut off the excess stems at the head of the taros, so as to ensure direct harvesting of the taros.

Description

Technical Field

[0001] This invention relates to the field of crop harvesting technology, and in particular to a clamping double-row taro harvesting device. Background Technology

[0002] Taro is a grain crop and also an important vegetable. It has high nutritional and medicinal value and can strengthen the spleen, replenish deficiencies, disperse nodules, and detoxify. After taro matures, it has a tall stem, so the stem needs to be removed when harvesting taro to facilitate harvesting.

[0003] Currently, the mechanization level of taro harvesting is low, and it mainly relies on manual labor, which is time-consuming, labor-intensive, and has a high labor intensity. With the development of technology, technicians in related fields have also made a lot of optimizations to the taro harvesting methods to solve the problems of time-consuming, labor-intensive, and high labor intensity. For a more accurate comparison, Chinese Patent No. CN115500139A discloses a multi-functional taro harvester, which includes a first fixed plate and a carriage. A motor is installed at the top of the first fixed plate. A first fixed rod, a second fixed rod, and a third fixed rod are welded at equal intervals on both sides of the bottom end of the first fixed plate near the front end. A second fixed plate is welded to the bottom end of the first fixed rod, the second fixed rod, and the third fixed rod. A digging shovel is rotatably connected between the two second fixed plates through a fourth fixed rod.

[0004] In the aforementioned prior art, a taro harvester is towed and used by a tractor. During the harvesting process, the taro is dug up onto the rotating wheel. By adjusting the digging shovel, it is possible to avoid damage to the taro or incomplete digging due to different ground conditions causing varying growth depths. This reduces unnecessary waste to a certain extent.

[0005] However, the aforementioned existing technologies still have some shortcomings in the process of harvesting taro:

[0006] 1. Because taro is quite brittle, and although the existing technology can be adjusted according to the depth of the taro, it cannot accurately determine the depth. Therefore, when digging taro with a shovel, it may be inserted directly into the taro, causing damage to the taro, affecting its quality, and thus directly affecting its appearance and selling price, thereby reducing the cost and profit of farmers.

[0007] 2. Furthermore, since taro has a tall stem at the top, and the existing technology mentioned above cannot remove the stem after digging up the taro, the remaining stem will increase the area that the taro harvester needs to use. The taro stems will also become entangled with each other, thus affecting the harvesting efficiency. In addition, the weight of taro with the stems will increase, making it difficult to transport them out of the field. Moreover, the remaining stems need to be removed a second time, which increases the workload and further affects efficiency.

[0008] Therefore, based on the above-mentioned viewpoints, there is still room for improvement in existing taro harvesting methods. Summary of the Invention

[0009] To address the aforementioned problems, this invention provides a clamping double-row taro harvesting device, comprising two sets of frames. Each frame consists of two horizontally arranged bottom beams, support rods mounted on the upper ends of the bottom beams via support rods, and crossbeams arranged between the support rods. The sidewalls of the support rods located on the outer side of the frame are equipped with movable wheels via connecting frames, and multiple bottom beams are equipped with suspension frames that rotate together on the same end.

[0010] The frame is equipped with a clamping and harvesting mechanism, which includes a clamping assembly located at the lower end of the bottom beam, and a front cutting mechanism is installed on the bottom beam.

[0011] Preferably, the clamping and harvesting mechanism further includes a rotating shaft that is rotatably mounted between the bottom beam and the support rod via a bearing and is symmetrically arranged along the length direction. The upper ends of the two support rods on any frame are equipped with drive motors through motor covers. The output shaft of the drive motor is connected to the rotating shaft and is used to drive the clamping assembly to work and pull out the taro. A linkage assembly is installed between the rotating shafts.

[0012] Preferably, the linkage assembly includes a first pulley and a second pulley sleeved on the outer wall of the shaft at corresponding positions on the two frames. Belts are respectively sleeved between the outer walls of the two first pulleys and between the outer walls of the two second pulleys. A top support wheel is rotatably sleeved on the outer wall of the shaft passing through the belts via a bearing.

[0013] Preferably, the clamping assembly includes a guide sprocket, the lower end of the rotating shaft passes through the bottom beam via a bearing and extends downward, the lower end of the bottom beam is provided with a guide sprocket sleeved on the outer wall of the rotating shaft, a chain is sleeved between two guide sprockets under the same bottom beam, and two sets of guide sprockets and chains are symmetrically arranged vertically, and clamping plates are installed at equal intervals on the outer wall of the chain.

[0014] Preferably, the bottom beam is inclined downward at the end near the suspension frame and is equipped with a support wheel. The clamping components at the lower end of the bottom beam are also arranged at an incline, so that the distance between the side of the chain near the frame and the ground is minimized, making it easier to pull up the taro.

[0015] Preferably, the bottom beams and support rods on opposite sides of the two frames are provided with a lever frame at their upward inclined ends, and the lever frame has multiple curved sections extending toward the opposite sides of the two frames on the side away from the frame.

[0016] Preferably, the clamping assembly further includes a support tension wheel and an adaptive adjustment wheel. A support tension wheel that cooperates with the chain and is used to lift the chain towards the middle of the frame is installed on the lower end of the bottom beam near the upward tilting side. An adaptive adjustment wheel that is used to adaptively tilt according to the diameter of the taro stem is installed on the lower end of the bottom beam near the downward tilting side.

[0017] The adaptive adjustment wheel includes a support frame installed at the lower end of the bottom beam, a support sprocket that meshes with the chain is rotatably connected to the support frame, and two return springs are symmetrically arranged between the support frame and the bottom beam along the length direction.

[0018] Preferably, the front cutting mechanism includes a horizontal frame plate, and the upper ends of multiple bottom beams are jointly provided with the horizontal frame plate. Two sets of execution components are provided on the horizontal frame plate, which are respectively located in the middle of the frame. The execution components include two support shafts that are rotatably mounted on the horizontal frame plate and symmetrically arranged along the clamping area. The support shafts are connected to the rotating shaft, and the lower end of the support shaft is provided with a cutting blade.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] I. This invention uses a chain in conjunction with a clamping plate to hold the taro stems, and the side of the chain away from the tractor is tilted upwards. Therefore, when the chain is running, the taro can be pulled out of the soil. The chains on the two frames can harvest two rows of taro at the same time, so as to improve harvesting efficiency. Then, the taro piled on the ground is moved to both sides by a shifting frame, so that workers can collect the taro.

[0021] Second, the present invention can prevent the sap from the taro stem from directly contacting the chain and causing rust after the skin of the taro stem is damaged by the extension plate set between the clamping plate and the chain. In addition, the clamping plate is made of hard rubber, which can increase the friction between the clamping plate and the taro stem, thereby providing greater friction when pulling out the taro, without applying rigid resistance to the taro, avoiding damage to the taro, and thus ensuring the quality and appearance of the taro.

[0022] Third, the present invention can tension the chain by supporting the tensioning wheel, so that the chain has sufficient clamping force during the picking and transporting of taro and prevents the taro from falling off; the adaptive adjustment wheel can adaptively tilt the distance between the two chains according to the diameter of the taro stem to increase the gap between the two chains, so that the taro stem can be smoothly inserted into the clamping area between the two chains and prevent jamming.

[0023] Fourth, this invention uses two support shafts to drive the blade and U-shaped baffle to rotate via a disc, and the two support shafts rotate at different speeds to ensure that the blade rotates faster than the U-shaped baffle. This allows the blade to have a greater cutting force when cutting the stem, while the baffle can apply a greater reaction force to the blade, thus ensuring that the blade can quickly cut the stem and avoid situations where the stem is difficult to cut. Furthermore, cutting the stem can prevent entanglement during taro harvesting, which would affect harvesting efficiency.

[0024] Fifth, when the chain transports the pulled taro to the side away from the tractor, the present invention can remove the excess stems from the taro head by the cooperation between the cutting saw blade and the auxiliary cutting blade, so as to ensure that the taro is harvested directly without the need for secondary stem removal, and can reduce the weight of the taro, so as to facilitate the transport of the taro from the field. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is a schematic diagram of the structure of the clamping and harvesting mechanism of the present invention.

[0028] Figure 3 This is a first structural schematic diagram of the clamping component of the present invention.

[0029] Figure 4 This is a schematic diagram of the second structure of the clamping component of the present invention.

[0030] Figure 5 This is a schematic diagram of the structure between the bottom beam and the front cutting mechanism of the present invention.

[0031] Figure 6 This is the present invention. Figure 5 A magnified view of part A.

[0032] Figure 7 This is a schematic diagram of the structure of the rear cutting mechanism of the present invention.

[0033] Figure 8 This is the present invention. Figure 7 A magnified view of section B.

[0034] Figure 9 This is a schematic diagram of the structure between the frame and the adjustment mechanism of the present invention.

[0035] Figure 10 This is a schematic diagram of the structure of the frame, self-locking screw and universal coupling of the present invention.

[0036] In the diagram, 1. Frame; 11. Bottom beam; 111. Support wheel; 112. Actuating frame; 12. Support rod; 13. Support rod; 14. Connecting frame; 15. Moving wheel; 16. Suspension frame; 2. Clamping and harvesting mechanism; 21. Clamping assembly; 211. Guide sprocket; 212. Chain; 213. Clamping plate; 214. Support tension wheel; 215. Adaptive adjustment wheel; 216. Support frame; 217. Support sprocket; 218. Return spring; 22. Rotating shaft; 23. Drive motor; 24. Linkage assembly; 241 1. First pulley; 242. Second pulley; 243. Belt; 244. Top support wheel; 3. Front cutting mechanism; 31. Horizontal frame plate; 32. Actuation component; 33. Support shaft; 34. Cutting blade; 35. Auxiliary component; 351. Differential wheel; 352. Disc; 353. Blade; 354. U-shaped stop bar; 355. Stop plate; 4. Rear cutting mechanism; 41. Connecting rod; 42. Linkage shaft; 43. Cutting saw blade; 44. Auxiliary cutting blade; 5. Adjustment mechanism; 51. Self-locking screw; 52. Universal coupling. Detailed Implementation

[0037] The following is in conjunction with the appendix Figures 1-10 The embodiments of the present invention will be described in detail, but the present invention may be implemented in many different ways as defined and covered by the claims.

[0038] This application discloses a clamping double-row taro harvesting device. This device is mainly used during taro harvesting. Technically, it can harvest two rows of taro simultaneously, improving harvesting efficiency. During harvesting, the taro stems are clamped, and the taro is pulled from the soil. The taro piled on the ground is then moved to both sides for easy collection by workers. Specifically, during taro harvesting, the tensioned chain 212 provides sufficient clamping force and can adaptively adjust the gap between the chains 212 according to the stem diameter. Furthermore, this clamping double-row taro harvesting device can cut the stems before pulling out the taro, preventing entanglement and improving harvesting efficiency. It can also remove excess stems from the taro head, ensuring direct harvesting of the taro and reducing its weight. This eliminates the need for secondary stem removal, facilitating the transport of the taro from the field. Example 1

[0039] Reference Figure 1As shown, a clamping double-row taro harvesting device includes two sets of frames 1. The frame 1 consists of two horizontally arranged bottom beams 11, a support rod 13 mounted on the upper end of the bottom beams 11 via a support rod 12, and a crossbeam disposed between the support rods 13. The side wall of the support rod 12 located on the outer side of the frame 1 is provided with a moving wheel 15 via a connecting frame 14. A suspension frame 16 is provided on the same rotating end of multiple bottom beams 11. A clamping harvesting mechanism 2 is installed on the frame 1. The clamping harvesting mechanism 2 includes a clamping component 21 disposed at the lower end of the bottom beams 11, and a front cutting mechanism 3 is installed on the bottom beams 11.

[0040] In actual use, the invention is first attached to the rear of the tractor via the suspension frame 16, and then moved by the tractor. During this process, the moving wheels 15 can provide support for the invention. When harvesting, the stem of the taro head is cut off by the front cutting mechanism 3, so that the length of the taro stem is reduced. Then, the harvesting clamping mechanism 2 clamps the reduced stem, pulls out the taro, and lifts it upward. Subsequently, the harvesting clamping mechanism 2 transports the pulled-out taro to the side away from the tractor and piles it in the field for workers to collect.

[0041] Reference Figure 2 As shown, in order to pull out the taro, a clamping and harvesting mechanism 2 is provided in this embodiment. Specifically, the clamping and harvesting mechanism 2 also includes a rotating shaft 22 that is rotatably disposed between the bottom beam 11 and the support rod 13 via a bearing and is symmetrically arranged along the length direction. The upper ends of the two support rods 13 on any frame 1 are provided with a drive motor 23 through a motor cover. The output shaft of the drive motor 23 is connected to the rotating shaft 22 and is used to drive the clamping assembly 21 to work and pull out the taro. A linkage assembly 24 is installed between the rotating shafts 22.

[0042] Furthermore, in this embodiment, the linkage component 24 includes a first pulley 241 and a second pulley 242 sleeved on the outer wall of the rotating shaft 22 located at corresponding positions on the two frames 1. A belt 243 is respectively sleeved between the outer walls of the two first pulleys 241 and between the outer walls of the two second pulleys 242. A top support wheel 244 is sleeved on the outer wall of the rotating shaft 22 passing through the belt 243 via a bearing.

[0043] In actual operation, the drive motor 23 is started, which drives the rotating shaft 22 to rotate. The rotating shaft 22 connected to the drive motor 23 drives the corresponding rotating shaft 22 to rotate synchronously through the first pulley 241 and the second pulley 242 respectively. The two drive motors 23 rotate in opposite directions, so that the rotating shaft 22 drives the clamping assembly 21 to pull the taro out of the soil. During this period, the top support wheel 244 can support the belt 243, thereby ensuring normal transmission between the two first pulleys 241 and between the two second pulleys 242.

[0044] Reference Figure 1 , Figure 2 and Figure 3 As shown, in order to cooperate with the rotating shaft 22 to pull the taro out of the soil, a clamping assembly 21 is provided in this embodiment. Specifically, the clamping assembly 21 includes a guide sprocket 211. The lower end of the rotating shaft 22 passes through the bottom beam 11 through a bearing and extends downward. The lower end of the bottom beam 11 is provided with a guide sprocket 211 sleeved on the outer wall of the rotating shaft 22. A chain 212 is sleeved between the two guide sprockets 211 under the same bottom beam 11. The guide sprockets 211 and the chain 212 are symmetrically arranged in two sets. Clamping plates 213 are installed at equal intervals on the outer wall of the chain 212. A clamping area for pulling out and transporting the taro is formed between the two chains 212 at the lower end of the same frame 1. The pulled-out taro is transported to the tail in the clamping area.

[0045] Furthermore, in this embodiment, the bottom beam 11 is inclined downward at one end near the frame 1 and is equipped with a support wheel 111. The clamping assembly 21 at the lower end of the bottom beam 11 is also arranged at an incline, so that the distance between the side of the chain 212 near the suspension frame 16 and the ground is minimized, so that the chain 212 has sufficient upward pulling force when pulling the taro out of the soil through the clamping plate 213.

[0046] Furthermore, in this embodiment, a lever 112 is provided at the inclined upward end of the bottom beam 11 and the support rod 13 on opposite sides of the two frames 1. The lever 112 has multiple curved sections extending toward the opposite sides of the two frames 1 on the side away from the frame 1.

[0047] In actual operation, the rotating shaft 22 drives the guide sprocket 211 to rotate synchronously. The two guide sprockets 211 acting on the same chain 212 rotate in the same direction, and the two guide sprockets 211 on the same frame 1 rotate in opposite directions and both rotate towards the side closer to the frame 1. Then, the chain 212 clamps the taro stems through the clamping plate 213. Since the side of the chain 212 away from the tractor is tilted upward, the chain 212 can pull the taro out of the soil when it is running. The chains 212 on the two frames 1 can harvest two rows of taro at the same time, so as to improve harvesting efficiency. Then, the chain 212 transports the pulled-out taro to the side away from the tractor and piles it on the ground. At this time, the taro can be moved to both sides by the lever 112 during the movement of the invention, so that the workers can collect the taro.

[0048] It should be noted that an extension plate is provided between the clamping plate 213 and the chain 212 to prevent the sap from directly contacting the chain 212 and causing rust after the taro stem skin is damaged. In addition, since the clamping plate 213 is in direct contact with the taro stem, a metal material would be prone to rusting, and rigidity would easily damage the taro. Therefore, the clamping plate 213 is made of hard rubber. The rubber material can increase the friction between the clamping plate and the taro stem, thereby providing greater friction when pulling out the taro and avoiding rigid contact with the taro, thus preventing damage to the taro and ensuring the quality and appearance of the taro.

[0049] Reference Figure 3 and Figure 4 As shown, the clamping assembly 21 also includes a support tension wheel 214 and an adaptive adjustment wheel 215. The lower end of the bottom beam 11 is equipped with a support tension wheel 214 that cooperates with the chain 212 and is used to support the chain 212 towards the middle of the frame 1. The lower end of the bottom beam 11 is equipped with an adaptive adjustment wheel 215 that is used to adaptively tilt according to the diameter of the taro stem.

[0050] Furthermore, in this embodiment, the adaptive adjustment wheel 215 includes a support frame 216 installed at the lower end of the bottom beam 11. A support sprocket 217 that meshes with the chain 212 is rotatably connected to the support frame 216. Two return springs 218 are symmetrically arranged between the support frame 216 and the bottom beam 11 along the length direction. The return springs 218 always apply an elastic pushing force to the support frame 216, so that the support frame 216 can tilt adaptively when subjected to force, and the support frame 216 can automatically return to its original position after tilting.

[0051] It should be noted that in this embodiment, both the support tension wheel 214 and the adaptive adjustment wheel 215 are detachably connected to the bottom beam 11 by bolts, so as to make large-scale adjustment of the distance between the support tension wheel 214 and the adaptive adjustment wheel 215 to complete the harvesting operation of other root and tuber crops.

[0052] In the specific implementation process, the tensioning wheel 214 can be used to tension the chain 212, so that the chain 212 has sufficient clamping force during the picking and transporting of taro, preventing the taro from falling off. At the same time, the adaptive adjustment wheel 215 can adaptively adjust the distance between the two chains 212 according to the diameter of the taro stem. When encountering a taro stem with a larger diameter, the support frame 216 of the adaptive adjustment wheel 215 will tilt adaptively under force to increase the gap between the two chains 212, so that the taro stem can be smoothly inserted into the clamping area between the two chains 212, preventing jamming. After the taro is transported from the clamping area to the tail, the elasticity of the return spring 218 can control the support frame 216 to drive the support sprocket 217 to return to its original position.

[0053] Reference Figure 5 and Figure 6 As shown, since taro stems are relatively long, they need to be cut before harvesting to reduce the stem length at the top of the taro, ensuring that the stems do not become entangled during harvesting. Based on this, a front cutting mechanism 3 is provided in this embodiment. Specifically, the front cutting mechanism 3 includes a horizontal frame plate 31. The upper ends of multiple bottom beams 11 are jointly provided with the horizontal frame plate 31. Two sets of execution components 32 are provided on the horizontal frame plate 31, which are located in the middle of the frame 1. The execution components 32 include two support shafts 33 that are rotatably mounted on the horizontal frame plate 31 and symmetrically arranged along the clamping area. The support shafts 33 are connected to the rotating shaft 22, and a cutting blade 34 is provided at the lower end of the support shafts 33.

[0054] Furthermore, in this embodiment, the horizontal frame plate 31 provided has an upwardly inclined guide plate on the side near the tractor, and the two bottom beams 11 of the same frame 1 are provided with inclined plates connected to the lower end of the guide plate on opposite sides. The guide plate and the inclined plate can guide the stem so that the stem can smoothly enter the cutting blade 34 for cutting.

[0055] In actual operation, the support shaft 33 drives the cutting blade 34 to rotate under the action of the rotating shaft 22, so that the cutting blade 34 cuts off the stem of the taro head. Example 2

[0056] Reference Figure 6 As shown in Embodiment 1, since the support shaft 33 drives the cutting blade 34 to rotate, there may be a situation where the cutting blade 34 cannot cut the stem. To solve this problem, this embodiment provides an auxiliary component 35. The auxiliary component 35 is as follows: the support shaft 33 near the middle of the horizontal frame plate 31 and the rotating shaft 22 on the same side are connected by a belt drive. A differential wheel 351 is sleeved on the outer wall of the support shaft 33 away from the middle of the horizontal frame plate 31. The differential wheel 351 is connected to another support shaft 33 by a belt drive. A disc 352 is sleeved on the lower end of the support shaft 33. A plurality of ring-shaped blades 353 are evenly arranged on the outer wall of the disc 352 at the lower end of the support shaft 33 without the differential wheel 351. The rotation direction of the blades 353 on the cutting side is the same as the rotation direction of the rotating shaft 22 on the side near the middle of the horizontal frame plate 31.

[0057] Furthermore, in this embodiment, a plurality of annularly distributed U-shaped baffles 354 are uniformly arranged on the outer wall of the disc 352 at the lower end of the support shaft 33 on which the differential wheel 351 is fitted. The openings of the U-shaped baffles 354 are arranged horizontally and two baffle plates 355 are hinged together by torsion springs. The torsion springs always apply torsional force to the baffle plates 355, so that the baffle plates 355 always remain vertical and can adaptively yield when the blade 353 passes through.

[0058] During operation, the support shaft 33 connected to the rotating shaft 22 rotates, causing the differential wheel 351 to rotate synchronously. This results in the support shaft 33 and the support shaft 33 with the differential wheel 351 rotating in the same direction. The two support shafts 33 respectively drive the blade 353 and the U-shaped baffle 354 to rotate via the disc 352. When the stem enters between the blade 353 and the U-shaped baffle, the blade 353 cuts the stem. During this process, the baffle plate 355 provides a reaction force to the blade 353, improving the efficiency of the blade 353 in cutting the taro stem. Furthermore... Because of the diameter difference between the support shaft 33 and the differential wheel 351, the differential wheel 351 can ensure that the rotational speeds of the two support shafts 33 are different. This ensures that the rotational speed of the blade 353 is greater than that of the U-shaped baffle 354, giving the blade 353 a greater cutting force when cutting the stem. The baffle plate 355 can apply a greater reaction force to the blade 353, thus ensuring that the blade 353 can quickly cut the stem, avoiding the situation where the stem is difficult to cut. Furthermore, cutting the stem can prevent entanglement from affecting the harvesting efficiency of taro. Example 3

[0059] Reference Figure 7 and Figure 8 As shown in Embodiment 2, although the stem can be cut by the auxiliary component 35, in order for the harvesting mechanism 2 to pull out the taro, it is necessary to ensure that a part of the stem at the head of the taro is retained. After the taro is pulled out, in order to harvest the taro directly, the stem at the head of the taro needs to be cut a second time before the taro is piled up. Based on this, this embodiment also provides a post-cutting mechanism 4 for removing excess stem at the head of the taro. The post-cutting mechanism 4 includes a connecting rod 41 installed between two bottom beams 11 of the same frame 1. Two linkage shafts 42 are symmetrically rotated along the length direction on the connecting rod 41. The two linkage shafts 42 are respectively connected to the nearby rotating shaft 22 by belt drive. A cutting saw blade 43 is sleeved on the lower end of one linkage shaft 42, and an auxiliary cutting blade 44 is sleeved on the lower end of the other linkage shaft 42.

[0060] Furthermore, in order to ensure that the stem of each taro head is removed, in this embodiment, the auxiliary cutting blade 44 is divided into upper and lower pieces, the cutting saw blade 43 is located between the two auxiliary cutting blades 44, and the cutting saw blade 43 and the auxiliary cutting blades 44 are located above the clamping space.

[0061] In actual use, the rotating shaft 22 drives the linkage shaft 42 to rotate, and the rotation direction of the linkage shaft 42 is the same as the rotation direction of the chain 212. The two linkage shafts 42 drive the cutting saw blade 43 and the auxiliary cutting blade 44 to rotate relative to each other. When the chain 212 transports the taro to the side away from the tractor, the cooperation between the cutting saw blade 43 and the auxiliary cutting blade 44 can remove the excess stems from the head of the taro, so as to ensure that the taro is harvested directly and the weight of the taro can be reduced. There is no need to remove the stems again, so as to facilitate the transport of the taro from the field. Example 4

[0062] Reference Figure 9 and Figure 10 As shown in Example 1, since taro is usually planted in ridges, the spacing of the ridges is adjusted according to the variety of taro. Therefore, when harvesting taro, the clamping space formed by the two chains 212 needs to be adaptively adjusted according to the spacing of the ridges. Specifically, this example also includes an adjustment mechanism 5 for adjusting the distance between the two frames 1. Specifically, the adjustment mechanism 5 includes self-locking screws 51. Two self-locking screws 51 are symmetrically threaded between the two bottom beams 11 and the two support rods 13 on the frame 1 along the length direction. The two adjacent self-locking screws 51 are connected by belt drive, and a universal coupling 52 is provided between the two opposite self-locking screws 51. The threads of the self-locking screws 51 on the two frames 1 are opposite.

[0063] In this embodiment, the self-locking screw 51 is a prior art for automatically locking after the threaded rod rotates, and will not be described in detail here; in addition, the universal coupling 52 also adopts prior art, mainly used to connect the two self-locking screws 51, and can ensure that the self-locking screws 51 at both ends of the universal coupling 52 can rotate simultaneously.

[0064] During the adjustment process, the self-locking screw 51 is rotated. While the self-locking screw 51 is rotating, it drives the two frames 1 to move synchronously relative to each other or in opposite directions. The frames 1 drive the chain 212 to move as a whole, so that the spacing of the clamping space can be adjusted according to the spacing of the ridges, so as to harvest taro in ridges with different spacing.

[0065] During operation: First step: First, the device is attached to the rear of the tractor via the suspension frame 16. The tractor drives the device to move. During this process, the moving wheels 15 can provide support for the device.

[0066] Step 2: When performing the harvesting operation, start the drive motor 23. The drive motor 23 drives the rotating shaft 22 to rotate. The rotating shaft 22 connected to the drive motor 23 drives the corresponding rotating shaft 22 to rotate synchronously through the first pulley 241 and the second pulley 242 respectively. The rotating shaft 22 drives the guide sprocket 211 to rotate synchronously. The two guide sprockets 211 acting on the same chain 212 rotate in the same direction. The two guide sprockets 211 on the same frame 1 rotate in opposite directions and both rotate towards the side closer to the frame 1.

[0067] Subsequently, the chain 212 clamps the taro stems through the clamping plate 213. Since the side of the chain 212 away from the tractor is tilted upward, the chain 212 can pull the taro out of the soil when it is running. The chains 212 on the two frames 1 can harvest two rows of taro at the same time, so as to improve harvesting efficiency. Then, the chain 212 transports the pulled taro to the side away from the tractor and piles it on the ground. During this process, the taro is moved to both sides by the agitator 112 so that the workers can collect the taro.

[0068] Step 3: When the chain 212 clamps the stem, the tensioning wheel 214 can be used to tension the chain 212, so that the chain 212 has sufficient clamping force during the extraction and transportation of taro, and prevents the taro from falling off. At the same time, the adaptive adjustment wheel 215 can adaptively tilt the gap between the two chains 212 according to the diameter of the taro stem, so as to increase the gap between the two chains 212, so that the taro stem can be smoothly inserted into the clamping area between the two chains 212, and prevent jamming.

[0069] Step 4: During the rotation of the support shaft 33 connected to the rotating shaft 22, the differential wheel 351 rotates synchronously, so that the support shaft 33 and the support shaft 33 with the differential wheel 351 rotate in the same direction. The two support shafts 33 drive the blade 353 and the U-shaped baffle 354 to rotate through the disc 352 respectively. When the stem enters between the blade 353 and the U-shaped baffle, the blade 353 cuts the stem. During this period, the baffle plate 355 can provide a reaction force to the blade 353, which improves the efficiency of the blade 353 in cutting the taro stem. Cutting the stem can prevent entanglement from affecting the harvesting efficiency when harvesting taro.

[0070] Step 5: The rotating shaft 22 drives the linkage shaft 42 to rotate, and the rotation direction of the linkage shaft 42 is the same as the rotation direction of the chain 212. The two linkage shafts 42 drive the cutting saw blade 43 and the auxiliary cutting blade 44 to rotate relative to each other. When the chain 212 transports the taro to the side away from the tractor, the cooperation between the cutting saw blade 43 and the auxiliary cutting blade 44 can cut off the excess stems of the taro head to ensure direct harvesting of the taro and reduce the weight of the taro, so as to facilitate the transport of the taro from the field.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0072] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A clamping type double row sweet potato harvesting apparatus comprising two groups of frames (1), characterized in that: The rack (1) is composed of two horizontally arranged bottom beams (11), support rods (12) installed on the upper ends of the bottom beams (11), supporting rods (13) installed between the support rods (12), and cross beams arranged between the supporting rods (13); the side walls of the support rods (12) located on the outer side of the rack (1) are provided with moving wheels (15) through connecting frames (14); and a plurality of bottom beams (11) are commonly rotatably arranged with a hanging frame (16) at the same end. A clamping harvesting mechanism (2) is installed on the rack (1), and the clamping harvesting mechanism (2) comprises a clamping assembly (21) arranged at the lower end of the bottom beam (11), and a front cutting mechanism (3) installed on the bottom beam (11). The clamping harvesting mechanism (2) further comprises rotating shafts (22) rotatably arranged between the bottom beams (11) and the supporting rods (13) and symmetrically arranged along the length direction; the upper ends of the two supporting rods (13) on any rack (1) are provided with driving motors (23) through motor covers; the output shafts of the driving motors (23) are connected with the rotating shafts (22) and used for driving the clamping assembly (21) to work and pull out taros; and a linkage assembly (24) is installed between the rotating shafts (22). The front cutting mechanism (3) comprises a horizontal frame plate (31), a plurality of bottom beams (11) commonly arranged with the horizontal frame plate (31) at the upper end, and two groups of execution assemblies (32) arranged at the middle part of the rack (1) and located on the horizontal frame plate (31); the execution assembly (32) comprises two support shafts (33) rotatably arranged on the horizontal frame plate (31) and symmetrically arranged along the clamping area; the support shaft (33) is connected with the rotating shaft (22); and the lower end of the support shaft (33) is provided with a cutting knife (34). The auxiliary assembly (35) is connected through belt transmission between the support shaft (33) close to the middle part of the horizontal frame plate (31) and the rotating shaft (22) on the same side of the support shaft (33); the outer wall of the support shaft (33) away from the middle part of the horizontal frame plate (31) is sleeved with a differential gear (351); the differential gear (351) is connected with the other support shaft (33) through belt transmission; the lower end of the support shaft (33) is sleeved with a disc (352); the outer wall of the disc (352) at the lower end of the support shaft (33) not sleeved with the differential gear (351) is uniformly provided with a plurality of annularly distributed blades (353); the rotating direction of the blade (353) on one side is the same as the rotating direction of the rotating shaft (22) close to the middle part of the horizontal frame plate (31); the outer wall of the disc (352) at the lower end of the support shaft (33) sleeved with the differential gear (351) is uniformly provided with a plurality of annularly distributed U-shaped blocking strips (354); the opening of the U-shaped blocking strip (354) is horizontally arranged and hinged with two blocking plates (355) through a torsional spring; the torsional spring always applies torsional force to the blocking plate (355), so that the blocking plate (355) always remains vertical and can self-adaptively give way when the blade (353) passes through; and the rotating speed of the blade (353) is greater than the rotating speed of the U-shaped blocking strip (354).

2. A clamp-type double row sweet potato harvesting apparatus according to claim 1, characterized by: The linkage assembly (24) comprises a first pulley (241) and a second pulley (242) sleeved on the outer wall of the rotating shaft (22) at the corresponding positions of the two racks (1), a belt (243) is sleeved between the outer walls of the two first pulleys (241) and between the outer walls of the two second pulleys (242) respectively, and the outer wall of the rotating shaft (22) penetrating the belt (243) is rotatably sleeved with a supporting pulley (244) through a bearing.

3. A clamp-type double row sweet potato harvesting apparatus according to claim 1, characterized in that: The clamping assembly (21) comprises a guide sprocket (211), the lower end of the rotating shaft (22) extends downward through the bottom beam (11) through a bearing, the bottom beam (11) is provided with a guide sprocket (211) sleeved on the outer wall of the rotating shaft (22) at the lower end, two guide sprockets (211) below the same bottom beam (11) are commonly sleeved with a chain (212), and the guide sprocket (211) and the chain (212) are symmetrically provided with two groups in up and down direction, and the outer wall of the chain (212) is installed with clamping plates (213) at equal intervals.

4. A clamp-type double row sweet potato harvesting apparatus according to claim 3, characterized in that: The bottom beam (11) is inclined downward at one end close to the suspension frame (16) and is provided with a supporting pulley (111), and the clamping assembly (21) at the lower end of the bottom beam (11) is also arranged in an inclined manner, so that the distance between the side of the chain (212) close to the landing gear and the ground is minimized, thereby facilitating the pulling up of taros.

5. A clamp-type double row sweet potato harvesting apparatus according to claim 1, characterized by: The inclined upward ends of the bottom beams (11) and the supporting rods (13) on the opposite sides of the two racks (1) are commonly provided with a pushing frame (112), and the pushing frame (112) has a plurality of curved sections extending away from the two racks (1) on one side of the end away from the racks (1).

6. A clamp-type double row sweet potato harvesting apparatus according to claim 3, characterized in that: The clamping assembly (21) further comprises a supporting tension pulley (214) and a self-adaptive adjusting pulley (215), the supporting tension pulley (214) is installed on the lower end of the bottom beam (11) close to the upwardly inclined side and cooperates with the chain (212) to support the chain (212) towards the side close to the middle of the rack (1), and the self-adaptive adjusting pulley (215) is installed on the lower end of the bottom beam (11) close to the downwardly inclined side and is self-adaptively inclined according to the diameter of the taro stem; The self-adaptive adjusting pulley (215) comprises a supporting frame (216) installed on the lower end of the bottom beam (11), the supporting frame (216) is rotatably connected with a supporting sprocket (217) engaged with the chain (212), and two return springs (218) are symmetrically arranged along the length direction between the supporting frame (216) and the bottom beam (11).

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