A peeling and cutting mechanism of a kenaf harvester

Abstract

The present invention discloses a barking and cutting mechanism for a kenaf harvester, comprising a mounting frame on which a barking mechanism, a barking mechanism, and a cutting mechanism are sequentially mounted. The barking mechanism cuts the bark of both sides of a kenaf stalk. After the kenaf stalk leaves the barking mechanism, it is taken over by the barking mechanism, which peels off the bark of the kenaf stalk. After the kenaf stalk leaves the barking mechanism, it is taken over by the cutting mechanism, which cuts the kenaf stalk into multiple segments. The present invention allows the kenaf stalk structure to be stably conveyed forward, thereby stably completing the bark cutting and peeling, and cutting the stalk into neat small segments, thereby facilitating subsequent collection and bundling.

Description

Technical Field

[0001] The present invention relates to agricultural machinery and equipment, and more particularly to a peeling and cutting mechanism of a kenaf harvester. Background Art

[0002] Kenaf is an annual or perennial herbaceous plant of the Malvaceae family and the genus Hibiscus, with straight stems that are about 3 meters high and about 2 centimeters thick. Both the bark and the stems of kenaf have their use value, so after harvesting, the bark is peeled, and then the bark and the stems can be collected and processed separately. In order to improve the efficiency of kenaf harvesting, a kenaf harvester is used to automate the harvesting, peeling, collection and bundling processes, replacing traditional manual operations. The present invention is to design a peeling and cutting mechanism for use on a kenaf harvester to achieve orderly transportation of kenaf stems and complete the peeling and cutting processes. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a peeling and cutting mechanism for a kenaf harvester, which realizes the orderly transportation of kenaf stalks and completes the peeling and collection of the stalks after cutting through the design of multiple mechanisms and a specific conveying structure.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a peeling and cutting mechanism of a kenaf harvester, comprising a mounting frame on which a peeling mechanism, a peeling mechanism and a cutting mechanism are sequentially arranged;

[0005] The bark cutting mechanism includes a first support portion, a bark cutting knife, and a first conveyor roller. The first conveyor rollers are arranged in pairs in a plurality of groups. The plurality of groups of first conveyor rollers are spaced apart along both sides of the first support portion. The plurality of groups of first conveyor rollers and the first support portion cooperate to form a space for limiting the position of kenaf stalks. The bark cutting knives are arranged in pairs on both sides of the output end of the first support portion. The kenaf stalks are inserted from above the first support portion and are limited in position by the cooperation of the first conveyor roller and the first support portion. When the first conveyor roller is in operation, it clamps and conveys the kenaf stalks to the output end of the first support portion, and the bark cutting knife cuts the epidermis of both sides of the kenaf stalks. After the kenaf stalks leave the bark cutting mechanism, they are taken over by the peeling mechanism.

[0006] The peeling mechanism includes a second support portion, a peeling knife and a second conveying roller. The second conveying rollers are arranged in pairs in a plurality of groups. The plurality of second conveying rollers are arranged at intervals along both sides of the second support portion. The plurality of second conveying rollers and the second support portion cooperate to form a space for limiting the position of the kenaf stalks. The peeling knives are arranged in pairs on both sides of the output end of the second support portion. The peeling knives have spiral blades, and the rotation axis of the spiral blades is parallel to the conveying direction of the kenaf stalks. The kenaf stalks are placed from above the second support portion and are limited in position by the cooperation of the second conveying roller and the second support portion. When the second conveying roller is in operation, it clamps the kenaf stalks and conveys them to the output end of the second support portion, and the rotating peeling knives peel off the skin of the kenaf stalks on both sides. After the kenaf stalks leave the peeling mechanism, they are taken over by the cutting mechanism.

[0007] The cutting mechanism includes two sections of conveyor belts, a cutting knife and a blocking part. The two sections of conveyor belts are arranged in sequence and leave a gap for the cutting knife to pass through. The cutting knife is movably arranged in the gap between the two sections of conveyor belts. The blocking part is movably arranged at the output end of the two sections of conveyor belts. When the blocking part moves to the output end of the conveyor belt, the kenaf stems are blocked, and the cutting knife is movably cut by the kenaf stems. After the cutting is completed, the blocking part and the cutting knife are moved away from the conveyor belt, and the conveyor belt is started to output the kenaf stems.

[0008] As an improvement, the skin cutting knife is a sheet-shaped knife or a circular knife arranged on the circumference of the rotating shaft.

[0009] As an improvement, the skin cutting mechanism further comprises a pair of first pressing rollers, which are arranged on both sides of the output end of the first support portion and are located after the skin cutting knife. The surfaces of the pair of first pressing rollers are provided with raised points arranged in a matrix.

[0010] As an improvement, the peeling mechanism also includes a pair of second pressure rollers, which are arranged on both sides of the output end of the second support part and are located after the peeling knife. The surfaces of the pair of second pressure rollers are provided with several pressure edges evenly arranged along the circumferential direction.

[0011] As an improvement, the outer sides of the skin cutting knife, the first conveying roller, the peeling knife and the second conveying roller are elastically pressed toward the inner kenaf stems through elastic structures.

[0012] As an improvement, the skinning knife, the first conveyor roller, the peeling knife, and the second conveyor roller are all arranged to be horizontally movable by a driving mechanism. The first conveyor roller and the second conveyor roller are driven by the driving mechanism to translate inward and clamp the kenaf stems to limit the kenaf stems and drive the conveyor when rotating; the skinning knife and the peeling knife are driven by the driving mechanism to translate inward and contact the kenaf stems to respectively cut and peel the epidermis of the kenaf stems.

[0013] As an improvement, the second supporting part is a roller shaft, which is rotated by an external drive, thereby driving the rotation of the kenaf stalks, and a channel for the skin to fall is formed between the roller shaft and the peeling knives on both sides and the second conveyor roller, and a collection trough for collecting the skin is provided below the channel.

[0014] As an improvement, the bark cutting mechanism, the peeling mechanism and the cutting mechanism are arranged in sequence from top to bottom in the height direction. The peeling mechanism is located obliquely below the output end of the bark cutting mechanism to receive the fallen kenaf stalks, and the cutting mechanism is located obliquely below the output end of the bark peeling mechanism to receive the fallen kenaf stalks, and the bark cutting mechanism and the cutting mechanism are positioned correspondingly in the upper and lower positions.

[0015] As an improvement, the output end of the cutting mechanism corresponds to the bottom of the peeling mechanism, and a collecting chamber for receiving the kenaf stalks output from the cutting mechanism is provided below the peeling mechanism. The opening of the collecting chamber corresponds to the output end of the conveyor belt, and an isolation net is set above the collecting chamber to block the skin falling from the peeling mechanism.

[0016] As an improvement, horizontally movable baffles are further provided on both sides of the conveyor belt, and the baffles on both sides are driven by a driving mechanism to translate inwards and outwards to limit the sides of the kenaf stalks.

[0017] Beneficial effects of the present invention:

[0018] 1. Through the multi-stage conveying structure and the clamping conveying of the conveying roller, the kenaf stalk structure can be stably conveyed forward, and the stem bark can be cut and peeled stably.

[0019] 2. The two-stage conveyor belt and cutting knife are used to cut the stems into neat small sections, which is convenient for subsequent collection and bundling.

[0020] 3. Each mechanism is independent of each other and can connect with the upstream and downstream processes to complete the automated and mechanized collection and processing of kenaf, replacing manual labor to improve processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a side structural diagram of the first embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of the top structure of the skin cutting mechanism of the present invention.

[0023] Figure 3 It is a schematic diagram of the top structure of the peeling mechanism of the present invention.

[0024] Figure 4 It is a schematic diagram of the top structure of the cutting mechanism of the present invention.

[0025] Figure 5It is a side structural diagram of the second embodiment of the present invention. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 、 2 , 3, 4, and 5 are specific embodiments of the peeling and cutting mechanism of the kenaf harvester of the present invention. The drawings only express the mutual coordination relationship between the structures. The positions and size ratios of the specific structures can be reasonably adjusted according to the actual product conditions, and do not limit the scope of protection of the present invention.

[0028] The specific embodiment includes a mounting frame 1, on which a skin cutting mechanism 2, a peeling mechanism 3 and a cutting mechanism 4 are sequentially arranged; the skin cutting mechanism 2 includes a first support portion 21, a skin cutting knife 22 and a first conveying roller 23, the first conveying rollers 23 are arranged in pairs in a plurality of groups, and the plurality of groups of first conveying rollers 23 are arranged at intervals along both sides of the first support portion 21, and a space for limiting the position of the kenaf stalks is formed by the plurality of groups of first conveying rollers 23 and the first support portion 21, the skin cutting knives 22 are arranged in pairs on both sides of the output end of the first support portion 21, and the kenaf stalks are placed from the top of the first support portion 21. , and is limited by the first conveying roller 23 and the first support part 21. When running, the first conveying roller 23 clamps and conveys the kenaf stalks to the output end of the first support part 21, and the skin cutting knife 22 cuts the skin on both sides of the kenaf stalks. After the kenaf stalks leave the skin cutting mechanism 2, they are taken over by the peeling mechanism 3; the peeling mechanism 3 includes a second support part 31, a peeling knife 32 and a second conveying roller 33. The second conveying rollers 33 are arranged in pairs in a plurality of groups. The plurality of groups of second conveying rollers 33 are arranged at intervals along both sides of the second support part 31. 1 cooperates to form a space for limiting the position of kenaf stalks, the peeling knives 32 are arranged in pairs on both sides of the output end of the second support part 31, the peeling knives 32 have spiral blades and the rotation axis of the spiral blades is parallel to the conveying direction of the kenaf stalks, the kenaf stalks are placed from above the second support part 31, and are limited by the second conveying roller 33 and the second support part 31. When the second conveying roller 33 is running, it clamps the kenaf stalks and conveys them to the output end of the second support part 31, and the rotating peeling knives 32 peel off the skin of the kenaf stalks on both sides. After the kenaf stalks leave the peeling mechanism 3, they are supported by the cutting mechanism 4 The cutting mechanism 4 includes two sections of conveyor belts 41, a cutting knife 42 and a blocking portion 43. The two sections of conveyor belts 41 are arranged in sequence and leave a gap for the cutting knife 42 to pass through. The cutting knife 42 is movably arranged in the gap between the two sections of conveyor belts 41. The blocking portion 43 is movably arranged at the output end of the two sections of conveyor belts 41. When the blocking portion 43 moves to the output end of the conveyor belt 41, the kenaf stalks are blocked, and the cutting knife 42 is movable to cut the kenaf stalks. After the cutting is completed, the blocking portion 43 and the cutting knife 42 are away from the conveyor belt 41, and the conveyor belt 41 starts to output the kenaf stalks.

[0029] When the present invention is used, the mounting frame 1 is installed on a kenaf harvester, and the kenaf harvester completes the kenaf harvesting through the harvesting mechanism, and the branches and leaves on the stems are cut off through the branch and leaf processing mechanism, and then the stems are transported to the buffer box, which can be achieved by existing technology. The output port of the buffer box is connected to the input end of the bark cutting mechanism 2, which is above the bark cutting mechanism 2. A single kenaf stem falls onto the first support part 21, and the first conveying rollers 23 on both sides are grouped at different positions of the first support part 21 to achieve clamping and limiting. The bark cutting knife 22 is on both sides of the output end of the first support part 21. The first conveying rollers 23 are driven by an external driving mechanism, which is preferably a servo motor, to perform stable control of start and stop. As the kenaf stem is transported, it contacts the bark cutting knife 22 on both sides, and the bark on the surface of the stem is cut from both sides by the bark cutting knife 22.

[0030] After leaving the bark cutting mechanism 2, the kenaf stalks are taken over by the peeling mechanism 3. The stalks are supported by the second support part 31. Second conveying rollers 33 at different positions of the second support part 31 are grouped on both sides to achieve clamping and limiting. The peeling knife 32 is on both sides of the output end of the second support part 31. The second conveying roller 33 is driven by an external driving mechanism. The driving mechanism is preferably a servo motor for stable start and stop control. As the kenaf stalks are transported, they contact the peeling knives 32 on both sides. The spiral-bladed peeling knife 32 will peel off the cut bark. The rotation of the spiral blade will continuously act on the bark. The spiral blade will scrape and peel off the incision position and the peeled bark, thereby promoting the separation of the bark from the stalks. As an optimization, multiple groups of peeling knives 32 can be further arranged on both sides of different positions of the second support part 31, so that the stem can be peeled more thoroughly when it is running. As the stem is transported, the unpeeled stem bark is contacted multiple times to achieve a better peeling effect. The spiral blade will also perform arc-shaped cutting while peeling the stem bark, which is more conducive to peeling the stem bark section by section.

[0031] After leaving the peeling mechanism 3, the kenaf stalks are taken over by the cutting mechanism 4. During the taking over, the stalks are transported by the started conveyor belt 41 to the output end and blocked by the blocking portion 43; then the conveyor belt 41 stops running, and the cutting knife 42 is driven to cut the stalks at the gap between the two sections of the conveyor belt 41. Then, a fixed-length stalk segment is cut out on the front section of the conveyor belt 41, and the stalk segment is continuously output after the blocking portion 43 leaves; then the remaining stalks on the rear section of the conveyor belt 41 continue to be transported to the blocking portion 43 for blocking, and continue to be cut, so that a single longer stalk is cut into multiple sections of fixed length for output, which can facilitate the subsequent collection and bundling of the shortened stalks.

[0032] As an improved specific embodiment, the skin cutting knife 22 is a sheet-shaped knife 221 or a circular knife 222 arranged on the circumference of the rotating shaft.

[0033] like Figure 1As shown, the blade 221 can cut the skin of the stem when it is transported through. Figure 2 As shown, the circular knife 222 can rotate with the rotating shaft and cut the epidermis in coordination with the conveying rotation of the stem. The rotation can be actively driven or passively rotated with the stem. The two knife embodiments can be selected according to actual needs to achieve the functional effect of cutting the epidermis.

[0034] As an improved specific embodiment, the skin cutting mechanism 2 also includes a pair of first pressing rollers 24, which are arranged on both sides of the output end of the first support part 21 and are located after the skin cutting knife 22. The surfaces of the pair of first pressing rollers 24 are provided with convex points 241 arranged in a matrix.

[0035] like Figure 1 、 2 As shown, the first pressing roller 24 is mainly used to squeeze the stem after the bark is cut, and the matrix-arranged protrusions 241 contact and squeeze multiple different positions on the surface of the stem, promoting the initial separation of the bark from the cut position, and the loosening and separation of the bark from the stem at the squeeze position, which is conducive to the subsequent peeling knife 32 at the peeling mechanism 3 to scrape and peel the bark more efficiently.

[0036] As an improved specific embodiment, the peeling mechanism 3 also includes a pair of second pressure rollers 34, which are arranged on both sides of the output end of the second support part 31 and are located after the peeling knife 32. The surface of the pair of second pressure rollers 34 is provided with a number of pressure edges 341 evenly arranged along the circumferential direction.

[0037] like Figure 1 、 3 As shown, the second pressing roller 34 is set to squeeze the stem bark to promote its falling off, and several pressing edges 341 perform a final large-scale squeezing on the stem at the output end of the second support part 31 to ensure that the stem bark that is still adhered is completely separated from the stem and falls off.

[0038] As an improved specific embodiment, the outer sides of the skinning knife 22, the first conveying roller 23, the peeling knife 32, and the second conveying roller 33 are elastically pressed toward the inner kenaf stems through elastic structures.

[0039] like Figure 2 、 3As shown in the figure, only the elastic structure is provided on the outside of several first conveyor rollers 23 and second conveyor rollers 33. In specific implementation, it can be applied to the outside of all skin cutting knives 22, first conveyor rollers 23, peeling knives 32, and second conveyor rollers 33, and can be further applied to the outside of the first pressing roller 24 and the second pressing roller 34; the elasticity can be set moderately, so that the knife or roller can be pushed open to form a tightly fitting conveying channel when the kenaf stems are conveyed or arrived, while ensuring stable conveying, cutting or peeling, and squeezing, providing a structural state that adapts to stems of different thicknesses.

[0040] As an improved specific embodiment, the skinning knife 22, the first conveyor roller 23, the peeling knife 32, and the second conveyor roller 33 are all arranged to be horizontally movable by a driving mechanism. The first conveyor roller 23 and the second conveyor roller 33 are driven by the driving mechanism to translate inward and clamp the kenaf stems to limit the kenaf stems and drive the conveyor when rotating; the skinning knife 22 and the peeling knife 32 are driven by the driving mechanism to translate inward and contact the kenaf stems to cut and peel the epidermis of the kenaf stems respectively.

[0041] like Figure 2 、 3 As shown in the figure, only the driving mechanism is shown on the outside of several first conveyor rollers 23 and second conveyor rollers 33. In specific implementation, it can be applied to the outside of all skin cutting knives 22, first conveyor rollers 23, peeling knives 32, and second conveyor rollers 33, and can be further applied to the outside of the first pressing roller 24 and the second pressing roller 34; the driving mechanism can be set as a cylinder, which is driven and separated by the cylinder to provide an initial accommodating space for stems of different thicknesses. After the stems are located on the first support part 21 and the second support part 31, the cylinder drives the knife or roller to close, forming a stable clamping, resistance, and squeezing state for the stems, thereby realizing the corresponding function; preferably, the elastic structure can be set at the same time as the driving mechanism, so as to achieve a better elastic clamping, resistance, and squeezing use state.

[0042] As an improved specific embodiment, the second supporting part 31 is a roller shaft, which is rotated by an external drive, thereby driving the rotation of the kenaf stalks, and a channel 35 for the skin to fall is formed between the roller shaft and the peeling knives 32 and the second conveying roller 33 on both sides, and a collection trough 36 for collecting the skin is provided below the channel 35.

[0043] like Figure 3As shown, the second support part 31 is set as a roller. When supporting the stem, it cooperates with the second conveying rollers 33 and the peeling knife 32 on both sides to form a stable structure for the stem. When in use, the roller is driven by a motor to rotate. As the stem is conveyed, the stem rotates. The peeling knife 32 with spiral blades on both sides can better promote the peeling knife 32 to contact the separation point between the stem bark and the stem, and then the peeling knife 32 further peels off the stem bark, and the peeling knife 32 cuts the stem bark so that the stem bark is peeled off section by section. The second conveying roller 33 itself is an arc-shaped support surface, and a natural channel 35 is formed on both sides for the epidermis to fall, and a collection groove 36 for collecting the epidermis is further provided to achieve the function of collecting the stem bark. The size of the collection groove 36 is sufficient to cover the position where the stem bark may fall. As an optimization, the collection groove 36 can be further provided with an output belt so that the stem bark can be transported from the outer end to the outside for collection.

[0044] As an improved specific embodiment, the bark cutting mechanism 2, the peeling mechanism 3 and the cutting mechanism 4 are arranged in sequence from top to bottom in the height direction, the peeling mechanism 3 is located obliquely below the output end of the bark cutting mechanism 2 to receive the fallen kenaf stalks, and the cutting mechanism 4 is located obliquely below the output end of the bark peeling mechanism 3 to receive the fallen kenaf stalks, and the bark cutting mechanism 2 and the cutting mechanism 4 correspond to each other in upper and lower positions.

[0045] like Figure 1 This embodiment is shown, and Figure 5 In the conventional arrangement of the present invention, when each mechanism is arranged in sequence at the same height, the overall process will occupy a longer space, and the arrangement length of the kenaf harvester will become too long, which will increase the space occupied by the kenaf harvester and reduce the flexibility of the movable turning. Figure 1 As shown, after the barking mechanism 2, the peeling mechanism 3 and the cutting mechanism 4 are arranged at different heights and by relying on the staggered arrangement, the length space occupied by the entire mechanism can be effectively reduced. Through the structural expansion in height, it is only necessary to set a conveying mechanism on the side to convey the stems at the cache box to the highest barking mechanism 2, and then the conveying of the stems can be staggered with the height and taken over in turn by the peeling mechanism 3 and the cutting mechanism 4 located at the lower position; the knives and rollers of the barking mechanism 2 and the peeling mechanism 3 are located on both sides and will not affect the stems falling from above to the support part, the cutting knife 42 of the cutting mechanism 4 can be set as a pair of left and right structures, and the left and right cutting knives 42 cut the stems by closing from both sides, or the cutting knife 42 can be set as a pair of upper and lower structures, and the upper cutting knife 42 rises to a level that does not affect the stems falling from the output end of the peeling mechanism 3 to the conveyor belt 41, and the upper and lower cutting knives 42 cut the stems by closing up and down.

[0046] As an improved specific embodiment, the output end of the cutting mechanism 4 corresponds to the bottom of the peeling mechanism 3, and a collecting chamber 5 for receiving the kenaf stalks output from the cutting mechanism 4 is provided below the peeling mechanism 3. The opening of the collecting chamber 5 corresponds to the output end of the conveyor belt 41, and an isolation net 6 is set above the collecting chamber 5 to block the skin falling from the peeling mechanism 3.

[0047] like Figure 1 As shown, the collection chamber 5 is disposed below the peeling mechanism 3, thereby not expanding the length space occupied by the entire mechanism, ensuring that the space occupied by the entire mechanism is minimized. The collection chamber 5 overlaps with the upper collection trough 36. To prevent the stem bark from accidentally falling, an isolation net 6 can be further provided to achieve an isolation effect, ensure the cleanliness of the collection chamber 5, and facilitate management. As an optimization, the collection chamber 5 can be further provided with an output belt so that the stems can be transported outward from the outer end for collection or docked with a baling mechanism for baling operations.

[0048] As an improved embodiment, horizontally movable baffles 44 are further provided on both sides of the conveyor belt 41. The baffles 44 on both sides are driven by a driving mechanism to translate inwards and outwards to limit the sides of the kenaf stalks.

[0049] like Figure 4 As shown, the cutting mechanism 4 can pre-accept multiple stems and then perform a one-time cutting operation on the multiple stems. After the multiple stems are accepted and the stems are aligned with the blocking portion 43, the conveyor belt 41 is stopped, and then the baffles 44 on both sides are driven and closed by a driving mechanism such as a cylinder to clamp the stems and limit their position, ensuring that the stems are in a straight state, and then the cutting knife 42 completes the cutting of the stems. This can improve the cutting stability, ensure that the stems are cut straight, and implement the simultaneous cutting of multiple stems, reduce the high frequency of cutting and conveying operations of the cutting mechanism 4, reduce the power consumption of the equipment, and extend the service life of components.

[0050] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions based on the principles of the present invention are within the scope of protection of the present invention. It should be noted that improvements and modifications that do not depart from the principles of the present invention are within the scope of protection of the present invention.

Claims

1. A peeling and cutting mechanism for a kenaf harvester, comprising a mounting frame (1), characterized in that: The mounting frame (1) is provided with a skin cutting mechanism (2), a peeling mechanism (3) and a cutting mechanism (4) in sequence; The skin cutting mechanism (2) comprises a first support portion (21), a skin cutting knife (22) and a first conveying roller (23), wherein the first conveying rollers (23) are arranged in pairs in a plurality of groups, and the plurality of groups of first conveying rollers (23) are arranged at intervals along both sides of the first support portion (21), and a space for limiting the position of the kenaf stalks is formed by the plurality of groups of first conveying rollers (23) and the first support portion (21), and the skin cutting knife (22) is arranged in pairs on both sides of the output end of the first support portion (21), and the kenaf stalks are placed from above the first support portion (21) and are limited by the first conveying roller (23) and the first support portion (21), and the first conveying roller (23) clamps and conveys the kenaf stalks to the output end of the first support portion (21) during operation, and the skin cutting knife (22) cuts the skin of the kenaf stalks on both sides, and the kenaf stalks are taken over by the peeling mechanism (3) after leaving the skin cutting mechanism (2); The peeling mechanism (3) includes a second support portion (31), a peeling knife (32) and a second conveying roller (33). The second conveying rollers (33) are arranged in pairs in a plurality of groups. The plurality of groups of second conveying rollers (33) are arranged at intervals along both sides of the second support portion (31). The plurality of groups of second conveying rollers (33) and the second support portion (31) cooperate to form a space for limiting the position of the kenaf stems. The peeling knives (32) are arranged in pairs on both sides of the output end of the second support portion (31). The peeling knives (32) are arranged in pairs on both sides of the output end of the second support portion (31). (32) has a spiral blade and the rotation axis of the spiral blade is parallel to the conveying direction of the kenaf stems. The kenaf stems are placed from above the second support part (31) and are limited by the second conveying roller (33) and the second support part (31). The second conveying roller (33) clamps the kenaf stems and conveys them to the output end of the second support part (31) during operation, and the rotating peeling knife (32) peels off the skin of the kenaf stems on both sides. After the kenaf stems leave the peeling mechanism (3), they are taken over by the cutting mechanism (4); The cutting mechanism (4) comprises two sections of conveyor belts (41), a cutting knife (42) and a blocking portion (43). The two sections of conveyor belts (41) are arranged in sequence and leave a gap for the cutting knife (42) to pass through. The cutting knife (42) is movably arranged in the gap between the two sections of conveyor belts (41). The blocking portion (43) is movably arranged at the output end of the two sections of conveyor belts (41). When the blocking portion (43) moves to the output end of the conveyor belt (41), the kenaf stalks are blocked, and the cutting knife (42) movably cuts the kenaf stalks. After the cutting is completed, the blocking portion (43) and the cutting knife (42) move away from the conveyor belt (41), and the conveyor belt (41) starts to output the kenaf stalks.

2. The peeling and cutting mechanism of a kenaf harvester according to claim 1, characterized in that: The skin cutting knife (22) is a sheet-shaped knife (221) or a circular knife (222) arranged on the circumference of a rotating shaft.

3. The peeling and cutting mechanism of a kenaf harvester according to claim 1 or 2, characterized in that: The skin cutting mechanism (2) further comprises a pair of first pressing rollers (24), the first pressing rollers (24) being arranged on both sides of the output end of the first support portion (21) and being located after the skin cutting knife (22), and the surfaces of the pair of first pressing rollers (24) being provided with convex points (241) arranged in a matrix.

4. The peeling and cutting mechanism of a kenaf harvester according to claim 1 or 2, characterized in that: The peeling mechanism (3) further comprises a pair of second pressing rollers (34), which are arranged on both sides of the output end of the second support portion (31) and are located after the peeling knife (32). The surfaces of the pair of second pressing rollers (34) are provided with a plurality of pressing edges (341) evenly arranged in the circumferential direction.

5. The peeling and cutting mechanism of a kenaf harvester according to claim 1 or 2, characterized in that: The outer sides of the skin cutting knife (22), the first conveying roller (23), the peeling knife (32), and the second conveying roller (33) are elastically pressed toward the inner kenaf stems through an elastic structure.

6. The peeling and cutting mechanism of a kenaf harvester according to claim 1 or 2, characterized in that: The skin cutting knife (22), the first conveying roller (23), the peeling knife (32), and the second conveying roller (33) are all arranged to be horizontally movable by a driving mechanism. The first conveying roller (23) and the second conveying roller (33) are driven by the driving mechanism to translate inwards and clamp the kenaf stems to limit the kenaf stems and drive the conveying when rotating; the skin cutting knife (22) and the peeling knife (32) are driven by the driving mechanism to translate inwards and contact the kenaf stems to cut and peel the epidermis of the kenaf stems respectively.

7. The peeling and cutting mechanism of a kenaf harvester according to claim 1 or 2, characterized in that: The bark cutting mechanism (2), the peeling mechanism (3) and the cutting mechanism (4) are arranged in sequence from top to bottom in the height direction. The peeling mechanism (3) is located obliquely below the output end of the bark cutting mechanism (2) to receive the fallen kenaf stalks. The cutting mechanism (4) is located obliquely below the output end of the bark cutting mechanism (3) to receive the fallen kenaf stalks. The bark cutting mechanism (2) and the cutting mechanism (4) are located in corresponding upper and lower positions.

8. The peeling and cutting mechanism of a kenaf harvester according to claim 7, characterized in that: The output end of the cutting mechanism (4) corresponds to the bottom of the peeling mechanism (3), and a collecting chamber (5) for receiving the kenaf stalks output from the cutting mechanism (4) is provided below the peeling mechanism (3). The opening of the collecting chamber (5) corresponds to the output end of the conveyor belt (41), and an isolation net (6) for blocking the skin falling from the peeling mechanism (3) is set above the collecting chamber (5).

9. The peeling and cutting mechanism of a kenaf harvester according to claim 1 or 2, characterized in that: Horizontally movable baffles (44) are also provided on both sides of the conveyor belt (41), and the baffles (44) on both sides are driven by a driving mechanism to translate inwards and outwards to limit the sides of the kenaf stalks.

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