CN215683435U - Re-threshing roller structure and harvester - Google Patents

Abstract

A re-threshing roller structure and a harvester relate to the technical field of agricultural machinery. The re-threshing roller structure comprises a roller bracket; the roller bracket is connected with a fixed tooth assembly, a roller concave plate and a roller assembly; the fixed tooth assembly is positioned above the roller assembly; the roller assembly comprises a first re-threshing roller, a second re-threshing roller, a third re-threshing roller and a fourth re-threshing roller which can rotate around respective axes; when the machine works, the rotating directions of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are opposite to the rotating direction of the fourth re-threshing roller, and the rotating speeds of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are all smaller than the rotating speed of the fourth re-threshing roller. The harvester includes a rethreshing drum structure. The utility model aims to provide a re-threshing roller structure and a harvester, which solve the technical problems of labor and time waste, low efficiency and high labor cost caused by manual picking in the prior art to a certain extent.

Description

Re-threshing roller structure and harvester

Technical Field

The utility model relates to the technical field of agricultural machinery, in particular to a re-threshing roller structure and a harvester.

Background

The domestic stem harvester is developed quickly in the aspects of whole machine design and picking device design, but the stem of the existing stem harvester contains fruits which are not completely removed after picking, and the later period needs manual repeated picking, which wastes labor and time, has low efficiency and high labor cost; for example, pepper harvesters have unextended pepper fruits on the pepper stem after picking, resulting in repeated picking by hand after the initial picking, labor and time consuming, inefficient, and high labor costs.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a re-threshing roller structure and a harvester, which solve the technical problems of labor and time waste, low efficiency and high labor cost caused by manual picking in the prior art to a certain extent.

In order to achieve the purpose, the utility model provides the following technical scheme:

a rethreshing roller structure comprises a roller bracket; the roller bracket is connected with a fixed tooth assembly, a roller concave plate and a roller assembly; the fixed tooth assembly is positioned above the roller assembly, and the roller concave plate is positioned below the roller assembly;

the roller assembly comprises a first re-threshing roller, a second re-threshing roller, a third re-threshing roller and a fourth re-threshing roller which can rotate around respective axes; the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are sequentially arranged along the circumferential direction of the fourth re-threshing roller, and meshing areas for picking fruits are respectively arranged between the first re-threshing roller, the second re-threshing roller and the third re-threshing roller and the fourth re-threshing roller;

when the machine works, the rotating directions of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are opposite to the rotating direction of the fourth re-threshing roller, and the rotating speeds of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are all smaller than the rotating speed of the fourth re-threshing roller.

In any of the above technical solutions, optionally, the fourth re-threshing cylinder is provided with a cylinder driving wheel for being in transmission connection with the driving mechanism, and a fourth transmission wheel for being in transmission connection with the first re-threshing cylinder, the second re-threshing cylinder and the third re-threshing cylinder.

In any of the above technical solutions, optionally, the first rethreshing drum, the second rethreshing drum, the third rethreshing drum, and the fourth rethreshing drum each include a drum shaft, a drum shell, and a fruit picking tooth;

the roller shell is sleeved and fixed on the roller shaft; the fruit picking teeth are uniformly distributed on the outer surface of the roller shell;

the first re-threshing roller, the second re-threshing roller and the third re-threshing roller respectively comprise a driven transmission wheel; the driven driving wheel is sleeved and fixed at one end of the roller shaft and is in transmission connection with the fourth driving wheel;

the drum driving wheel is sleeved at one end of a drum shaft of the fourth re-threshing drum, and the fourth driving wheel is sleeved and fixed at the other end of the drum shaft of the fourth re-threshing drum.

In any of the above technical solutions, optionally, a safety clutch is disposed between the drum driving wheel and the drum shaft of the fourth re-threshing drum; the safety clutch is used for separating the drum driving wheel from the drum shaft of the fourth re-threshing drum when the torque of the drum shaft of the fourth re-threshing drum is higher than a preset value so as to cut off the power input to the drum shaft of the fourth re-threshing drum by the driving mechanism, protect the structure of the re-threshing drum and reduce the risk of damage of the structure of the re-threshing drum;

and/or the fruit picking teeth of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are respectively arranged in a staggered manner with the fruit picking teeth of the fourth re-threshing roller; the fruit picking teeth of the first re-threshing roller and the third re-threshing roller are respectively arranged in a staggered mode with the fruit picking teeth of the second re-threshing roller.

In any of the above technical solutions, optionally, the fixed tooth assembly includes a cover plate and a fixed tooth fixedly connected to the cover plate; the fixed teeth are arranged below the cover plate;

and a meshing area is arranged between the fixed teeth and the third re-threshing roller, and the fixed teeth and the fruit picking teeth of the third re-threshing roller are arranged in a staggered mode.

In any of the above technical solutions, optionally, the drum bracket includes a drum connecting beam, a drum right side wall, and a drum left side wall; the first re-threshing cylinder, the second re-threshing cylinder, the third re-threshing cylinder and the fourth re-threshing cylinder are all arranged between the right side wall of the cylinder and the left side wall of the cylinder; the roller right side wall and the roller left side wall are respectively fixedly connected with the roller connecting beam.

In any of the above solutions, optionally, the roller concave includes a first arc part and a second arc part; the first arc-shaped part is matched with the outer contour of the first re-threshing roller in shape, and the second arc-shaped part is matched with the outer contour of the fourth re-threshing roller in shape; the joint of the first arc-shaped part and the second arc-shaped part is positioned below the meshing area of the first re-threshing roller and the fourth re-threshing roller;

and/or the roller concave plate is a closed concave plate.

In any of the above technical solutions, optionally, the first and fourth rethreshing drums are both located below the second and third rethreshing drums;

in operation, the first rethreshing drum is capable of transporting the stalks on the drum deck to an engagement region between the first rethreshing drum and the fourth rethreshing drum.

A harvester comprises a machine body and a re-threshing roller structure;

the re-threshing roller structure is arranged inside the machine body.

In any one of the above technical solutions, optionally, an upper front cleaning roll assembly corresponding to the roller concave and the first re-threshing roller is arranged in the machine body, and the upper front cleaning roll assembly is located above the roller concave;

a lower cleaning assembly is arranged in the machine body and is positioned below the upper front cleaning roller assembly and the roller concave plate;

an upper rear cleaning roller assembly corresponding to the positions of the roller concave plate and the fourth re-threshing roller is arranged in the machine body, and the upper rear cleaning roller assembly is positioned below an engaging area of the third re-threshing roller and the fourth re-threshing roller;

a cylinder elevator, a rear elevator and a driving mechanism are also arranged in the machine body;

the cylinder elevator is positioned below the upper rear cleaning roll assembly, and the output end of the lower cleaning assembly is positioned above the cylinder elevator; the cylinder elevator can ascend and convey objects to the rear elevator;

the driving mechanism is in driving connection with the fourth re-threshing roller;

a grass collecting box is arranged below the output end of the upper back cleaning roller assembly;

a cleaning fan assembly is arranged below the lower cleaning assembly.

The utility model has the following beneficial effects:

according to the re-threshing roller structure and the harvester, when in work, the rotating directions of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are all opposite to the rotating direction of the fourth re-threshing roller, and the rotating speeds of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are all smaller than the rotating speed of the fourth re-threshing roller, namely, the differential re-threshing principle is utilized, secondary picking of fruits which are not completely removed from stems after being picked by the existing harvester is achieved, the loss rate can be effectively reduced, the cost performance is high, the adaptability is strong, the operation efficiency is high, the harvesting effect is good, and the technical problems that labor and time are wasted, the efficiency is low and the labor cost is high due to manual picking in the prior art are effectively solved.

In order to make the aforementioned and other objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a rethreshing drum structure provided in an embodiment of the present invention;

FIG. 2 is a schematic view of an assembly of a roller assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a fourth re-threshing cylinder according to an embodiment of the present invention;

FIG. 4 is a left side view of the fourth stripping drum shown in FIG. 3;

FIG. 5 is a schematic structural diagram of a concave plate of a roller according to an embodiment of the present invention;

FIG. 6 is a top view of the cylinder recess plate shown in FIG. 5;

FIG. 7 is a schematic structural diagram of a fixed tooth assembly according to an embodiment of the present invention;

FIG. 8 is a top view of the fixed tooth assembly shown in FIG. 7;

fig. 9 is a schematic structural diagram of a harvester according to an embodiment of the utility model.

Icon: 100-a drum support; 110-roller link beam; 120-drum right side wall; 130-drum left side wall; 200-a fixed tooth assembly; 210-a cover plate; 211-re-threshing cylinder front upper cover plate; 212-re-threshing cylinder rear upper cover plate; 213-left fixed seat of front upper cover plate; 214-right fixed seat of front upper cover plate; 215-fixed tooth left fixed seat; 216-fixed tooth right fixed seat; 220-fixing teeth; 300-roller concave plate; 400-a roller assembly; 410-a first re-threshing cylinder; 411-a passive transmission wheel; 420-a second re-threshing cylinder; 430-a third re-threshing cylinder; 440-a fourth re-threshing cylinder; 441-a roller driving wheel; 442-a fourth transmission wheel; 443-a drum shaft; 444-drum shell; 445-picking fruit teeth; 446-safety clutch; 500-body; 510-mounting the frame; 520-lower frame; 530-an upper front cleaning roll assembly; 540-lower cleaning assembly; 550-mounting a rear cleaning roller assembly; 560-cylinder elevator; 570-rear elevator; 580-a drive mechanism; 590-a cleaning fan assembly; 600-grass collecting box.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the description refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Examples

The embodiment provides a re-threshing roller structure and a harvester; referring to fig. 1 to 9, fig. 1 is a schematic structural diagram of a rethreshing drum structure provided in this embodiment, and a schematic diagram of the rethreshing drum structure assembled on a harvester is shown in the diagram; fig. 2 is an assembly schematic view of the drum assembly provided in this embodiment, and for convenience of illustration, the first re-threshing drum, the second re-threshing drum, the third re-threshing drum and the fourth re-threshing drum are stretched and flattened; fig. 3 is a schematic structural view of a fourth rethreshing drum provided in the present embodiment, and fig. 4 is a left side view of the fourth rethreshing drum shown in fig. 3; FIG. 5 is a schematic structural diagram of a cylinder recess plate provided in the present embodiment, and FIG. 6 is a top view of the cylinder recess plate shown in FIG. 5; fig. 7 is a schematic structural view of the fixed tooth assembly provided in the present embodiment, and fig. 8 is a top view of the fixed tooth assembly shown in fig. 7; fig. 9 is a schematic structural diagram of the harvester provided in this embodiment. Wherein arrows shown in fig. 1 and 9 are respective rotation directions of the first, second, third and fourth rethreshing drums 410, 420, 430 and 440.

The rethreshing cylinder structure that this embodiment provided is applicable to the rethreshing of different hot pepper varieties and stem class crop, realizes containing on the stem of current stem class crop harvester picking back and does not take off the fruit completely, picks it twice to it, reduces the loss rate, reduces the artifical rethreading cost in later stage, improves the profitability, belongs to agricultural harvesting machine technical field, and its principle is applicable to all hot pepper and stem class harvester machines. For example, the rethreshing cylinder structure that this embodiment provided can realize containing not taking off the hot pepper fruit to the end on the current hot pepper harvester picks back pepper pole, picks it for the second time, reduces the loss rate, reduces the artifical picking cost in later stage, improves the profitability.

Referring to fig. 1-8, the rethreshing drum structure comprises a drum support 100; the roller bracket 100 is connected with a fixed tooth assembly 200, a roller concave plate 300 and a roller assembly 400; the fixed tooth assembly 200 is positioned above the roller assembly 400, and the roller recess plate 300 is positioned below the roller assembly 400.

The drum assembly 400 comprises a first 410, a second 420, a third 430 and a fourth 440 take-off drum rotatable about respective axes; the first, second, third and fourth re-drying drums 410, 420, 430 and 440 are coupled to the drum support 100.

The first re-threshing cylinder 410, the second re-threshing cylinder 420 and the third re-threshing cylinder 430 are sequentially arranged along the circumferential direction of the fourth re-threshing cylinder 440, and meshing areas for picking fruits are respectively arranged between the first re-threshing cylinder 410, the second re-threshing cylinder 420 and the third re-threshing cylinder 430 and the fourth re-threshing cylinder 440. The first re-threshing cylinder 410, the second re-threshing cylinder 420 and the third re-threshing cylinder 430 are respectively engaged with the fourth re-threshing cylinder 440, so that the multi-picking of the pepper, the cotton boll and other fruits is facilitated.

In operation, the rotation directions of the first, second and third rethreshing drums 410, 420 and 430 are all opposite to the rotation direction of the fourth rethreshing drum 440, and the rotation speeds of the first, second and third rethreshing drums 410, 420 and 430 are all less than the rotation speed of the fourth rethreshing drum 440. Optionally, the axes of the first, second, third and fourth shuttle drums 410, 420, 430, 440 are parallel to each other.

The material entering the structure of the rethreshing roller enters the meshing area between the first rethreshing roller 410 and the fourth rethreshing roller 440 along the upper surface of the roller concave plate 300 under the action of the first rethreshing roller 410, the rotating speed and the linear speed of the fourth rethreshing roller 440 are higher than those of the first rethreshing roller 410, the rotating direction is opposite to that of the first rethreshing roller 410, the fruit remained on the stems are repeatedly picked for one time by utilizing the speed difference between the two rollers, the picked material enters the meshing area between the second rethreshing roller 420 and the fourth rethreshing roller 440, the rotating speed of the fourth rethreshing roller 440 is higher than that of the second rethreshing roller 420, the rotating direction is opposite to that of the second rethreshing roller 420, the fruit remained on the stems are repeatedly picked for two times by utilizing the speed difference between the rollers, the picked material enters the meshing area between the third rethreshing roller 430 and the fourth rethreshing roller 440, the rotating speed of the fourth rethreshing roller 440 is higher than that of the third rethreshing roller 430, the rotation direction is opposite to that of the third re-threshing roller 430, the residual fruits on the stems are repeatedly picked for three times by utilizing the speed difference between the rollers, the picking efficiency is high, the damage rate to the fruits such as hot peppers, cotton bolls and the like during picking is low, the integrity of the re-threshed straws is good, the manual operation intensity in the later period can be effectively reduced, the labor cost is saved, the impurity rate is reduced, and the yield is improved.

In the threshing cylinder structure in this embodiment, when the threshing cylinder structure works, the rotating directions of the first threshing cylinder 410, the second threshing cylinder 420 and the third threshing cylinder 430 are all opposite to the rotating direction of the fourth threshing cylinder 440, and the rotating speeds of the first threshing cylinder 410, the second threshing cylinder 420 and the third threshing cylinder 430 are all smaller than the rotating speed of the fourth threshing cylinder 440, that is, the differential threshing principle is used, so that secondary picking of fruits which are not completely removed from stems of an existing harvester after picking is realized, the loss rate can be effectively reduced, the cost performance is high, the adaptability is strong, the operation efficiency is high, the harvesting effect is good, and the technical problems of labor waste, time waste, low efficiency and high labor cost caused by manual picking in the prior art are effectively solved.

The existing stem crop harvester has the advantages that fruits which are not completely removed are contained in the stems after the fruits are picked, secondary picking is carried out on the fruits, the secondary picking roller structure and the cleaning and separating technology are poor, the using effect is poor, impurities such as a large number of stems and leaves are mixed in the fruits after the fruits are picked for the first time, cleaning and separating are needed manually in the later period, repeated picking is carried out, labor and time are wasted, the efficiency is low, the labor cost is high, if manual cleaning and separating are not carried out, the fruits are transported and mildewed in the storage process, and the selling price of the fruits is seriously influenced. For example, the pepper stems after the first picking contain pepper fruits which are not removed completely, and the pepper after the first picking is mixed with a large amount of impurities such as pepper stems, pepper leaves and the like, and the pepper is cleaned and separated manually, if the pepper is not cleaned and separated manually, the pepper is mildewed in the transportation and storage processes, and the sale price of the pepper is seriously influenced.

In this embodiment the rethreshing cylinder structure adopts four cylinder combinations, utilizes the speed difference between two liang, realizes that the differential is flexible to be picked, picks efficiently, and the damage rate to fruits such as hot pepper, cotton boll is low during the picking, and the straw integrity after the rethreshing is good, and the straw impurity that gets into in fruits such as hot pepper, cotton boll is few, separates fruit, stem stalk, the leaf of picking effectively, reduces the manual work intensity in later stage, saves the cost of labor, reduces the impurity rate, improves the earning rate. In the embodiment, the threshing cylinder structure can harvest various stem crops such as hot pepper, cotton boll and the like by adjusting different parameters of the first threshing cylinder 410, the second threshing cylinder 420, the third threshing cylinder 430 and the fourth threshing cylinder 440, is suitable for mechanical harvesting of fruits such as different regions, different linear peppers, plate peppers and different cotton bolls, can realize multiple purposes in one machine, has good harvesting effect, high operation efficiency, high cost performance and strong adaptability, can achieve the domestic advanced level of operation performance, and has wide popularization prospect.

Referring to fig. 2-4, in an alternative of this embodiment, a fourth stripping drum 440 is provided with a drum drive wheel 441 for driving connection with the drive mechanism, and with a fourth drive wheel 442 for driving connection with the first stripping drum 410, the second stripping drum 420 and the third stripping drum 430. Alternatively, the roller driving wheel 441 is a driving wheel such as a sprocket, a pulley, a gear, etc. Optionally, the fourth transmission wheel 442 is a sprocket, a pulley, a gear, or the like.

Referring to fig. 2-4, in an alternative of the present embodiment, the first rethreshing drum 410, the second rethreshing drum 420, the third rethreshing drum 430 and the fourth rethreshing drum 440 each comprise a drum shaft 443, a drum housing 444 and a picking tooth 445; optionally, the drum shell 444 is a weldment.

The drum shell 444 is sleeved and fixed on the drum shaft 443; the fruit picking teeth 445 are uniformly distributed on the outer surface of the roller shell 444; optionally, a plurality of rows of picker teeth 445 are provided on the outer surface of the drum shell 444; optionally, each row of picker teeth 445 is spaced axially of the drum shell 444, and a plurality of rows of picker teeth 445 are spaced circumferentially of the drum shell 444.

The first, second and third re-threshing drums 410, 420 and 430 further comprise a passive transmission wheel 411; the driven transmission wheel 411 is sleeved and fixed at one end of the roller shaft 443, and the driven transmission wheel 411 is in transmission connection with the fourth transmission wheel 442; alternatively, the driven transmission wheel 411 and the fourth transmission wheel 442 may adopt a belt transmission, a chain transmission or a gear transmission, or other transmission modes. Alternatively, driven transmission wheel 411 and fourth transmission wheel 442 can be directly transmitted or can be transmitted through a transmission mechanism. Optionally, the driven transmission wheel 411, the fourth transmission wheel 442 and the roller driving wheel 441 are fixedly connected with the roller shaft 443 through the expansion coupling sleeve. Optionally, the drum shaft 443 is connected with the drum support by a fixed bearing seat.

The roller driving wheel 441 is sleeved on one end of the roller shaft 443 of the fourth re-threshing roller 440, and the fourth driving wheel 442 is sleeved and fixed on the other end of the roller shaft 443 of the fourth re-threshing roller 440. In the present embodiment, the re-threshing cylinder structure is connected to the fourth re-threshing cylinder 440 through a driving mechanism, so that the fourth re-threshing cylinder 440 rotates around its own axial direction, and the fourth re-threshing cylinder 440 is respectively connected to the first re-threshing cylinder 410, the second re-threshing cylinder 420, and the third re-threshing cylinder 430 in a transmission manner, so that the first re-threshing cylinder 410, the second re-threshing cylinder 420, and the third re-threshing cylinder 430 respectively rotate around their own axial directions.

Referring to fig. 3, in an alternative of the present embodiment, a safety clutch 446 is disposed between the drum driving wheel 441 and the drum shaft 443 of the fourth re-threshing drum 440; when the torque of the drum shaft 443 of the fourth re-disengaging drum 440 of the safety clutch 446 is higher than the preset value, the safety clutch 446 separates the drum driving wheel 441 from the drum shaft 443 of the fourth re-disengaging drum 440 so as to cut off the power input from the driving mechanism to the drum shaft 443 of the fourth re-disengaging drum 440, thereby protecting the re-disengaging drum structure, reducing the risk of damage of the re-disengaging drum structure, and improving the safety of the re-disengaging drum structure.

For example, the safety clutch 446 includes a safety ratchet sleeve, a clutch spring, a retainer ring and a nut which are sequentially sleeved on the drum shaft 443 of the fourth re-disengaging drum 440; the safety ratchet sleeve can be coupled to or separated from the drum driver 441, and the nut fixes the retainer ring to the drum shaft 443. Optionally, the roller driving wheel 441 is fixedly connected with a tooth pad; the drum driving wheel 441 is combined with or separated from the safety ratchet sleeve through a tooth pad.

Referring to fig. 1, in an alternative of the present embodiment, the fruit picking teeth 445 of the first re-threshing cylinder 410, the second re-threshing cylinder 420 and the third re-threshing cylinder 430 are respectively arranged in a staggered manner with the fruit picking teeth 445 of the fourth re-threshing cylinder 440; the fruit picking teeth 445 of the first and third re-threshing drums 410, 430 are respectively arranged in a staggered manner with the fruit picking teeth 445 of the second re-threshing drum 420. Through dislocation arrangement to fruit is picked to better flexibility, it is picked efficiently, and the damage rate to fruits such as hot pepper, cotton boll is low during the picking.

Referring to fig. 1, 7 and 8, in an alternative embodiment of the present embodiment, the fixed tooth assembly 200 includes a cover plate 210 and a fixed tooth 220 fixedly connected to the cover plate 210; the fixed teeth 220 are disposed under the cover plate 210.

The fixed teeth 220 and the third re-threshing roller 430 are provided with a meshing area, and the fixed teeth 220 and the fruit picking teeth 445 of the third re-threshing roller 430 are arranged in a staggered mode.

Optionally, the cover 210 includes a re-threshing cylinder front upper cover 211 and a re-threshing cylinder rear upper cover 212, and the re-threshing cylinder front upper cover 211 and the re-threshing cylinder rear upper cover 212 are fixedly connected by welding, screwing, or the like.

Optionally, a left front upper cover plate fixing seat 213 and a right front upper cover plate fixing seat 214 are respectively connected to two sides of the front upper cover plate 211 of the rethreshing drum, and the left front upper cover plate fixing seat 213 and the right front upper cover plate fixing seat 214 are respectively fixedly connected to the drum bracket 100.

Optionally, a fixed-tooth left fixing seat 215 and a fixed-tooth right fixing seat 216 are respectively connected to two sides of the back upper cover plate 212 of the rethreshing drum, and the fixed-tooth left fixing seat 215 and the fixed-tooth right fixing seat 216 are respectively fixedly connected to the drum bracket 100.

Referring to fig. 1 and 2, in an alternative of the present embodiment, a drum bracket 100 includes a drum coupling beam 110, a drum right sidewall 120, and a drum left sidewall 130; the first, second, third and fourth re-threshing cylinders 410, 420, 430 and 440 are all disposed between the cylinder right side wall 120 and the cylinder left side wall 130; the drum right sidewall 120 and the drum left sidewall 130 are fixedly connected to the drum connecting beam 110, respectively.

Referring to fig. 5 and 6, in an alternative of the present embodiment, the drum concave 300 includes a first arc portion and a second arc portion; the first arc-shaped part is adapted to the outer contour of the first rethreshing drum 410, and the second arc-shaped part is adapted to the outer contour of the fourth rethreshing drum 440; the junction of the first and second arc-shaped portions is located below the engagement area of the first and fourth rewind drums 410, 440. The shape of the first arc-shaped part is adapted to the outer contour of the first rethreshing roller 410, the shape of the second arc-shaped part is adapted to the outer contour of the fourth rethreshing roller 440, and the joint of the first arc-shaped part and the second arc-shaped part is positioned below the meshing area of the first rethreshing roller 410 and the fourth rethreshing roller 440, so that the stalk crops and the fruits can be better brought into the meshing area between the first rethreshing roller 410 and the fourth rethreshing roller 440, and accumulation below the meshing area is avoided.

Alternatively, the roller concave 300 is a closed concave; the roller concave plate 300 adopts a closed concave plate, which has the advantage of being not easy to block.

Referring to fig. 1, in an alternative of the present embodiment, the first and fourth stripping drums 410 and 440 are both located below the second and third stripping drums 420 and 430. In operation, the first shuttle roller 410 is able to transport the stalks on the roller deck 300 to the area of engagement between the first shuttle roller 410 and the fourth shuttle roller 440. The re-threshing rollers of the roller assembly 400 are arranged in an upper space and a lower space, so that the re-threshing roller assembly is simple in structure, compact in arrangement, small in occupied space and convenient to adjust speed.

Referring to fig. 9, the present embodiment further provides a harvester, which includes a machine body 500 and the above-mentioned re-threshing cylinder structure; optionally, the body 500 includes an upper frame 510 and a lower frame 520; the threshing cylinder arrangement is located between the upper frame 510 and the lower frame 520, at the rear of the harvester.

The fixed-tooth assembly 200 is fixed to the upper frame 510.

The re-threshing cylinder structure is installed inside the machine body 500. The drum bracket 100 is connected to the body 500.

In an alternative of this embodiment, an upper front cleaning roll assembly 530 is provided in the machine body 500 in correspondence with the positions of the drum recess 300 and the first re-threshing drum 410, and the upper front cleaning roll assembly 530 is located above the drum recess 300.

Optionally, a lower cleaning assembly 540 is provided in the machine body 500 below the upper front cleaning roll assembly 530 and the drum recess plate 300.

Optionally, an upper rear cleaning roll assembly 550 is provided in the machine body 500 in correspondence to the positions of the drum recess plate 300 and the fourth re-threshing drum 440, and the upper rear cleaning roll assembly 550 is located below the engagement area of the third re-threshing drum 430 and the fourth re-threshing drum 440.

Optionally, a cylinder elevator 560, a rear elevator 570 and a driving mechanism 580 are further provided in the body 500. Optionally, a drum elevator 560 is located below the upper rear cleaning roll assembly 550 and the output of the lower cleaning assembly 540 is located above the drum elevator 560; the drum elevator 560 can ascend and deliver objects to the rear elevator 570.

Optionally, a drive mechanism 580 is drivingly connected to the fourth rewind drum 440.

Optionally, a grass collection bin 600 is provided below the output of the upper rear cleaning roll assembly 550.

Optionally, a cleaning fan assembly 590 is mounted below the lower cleaning assembly 540.

When the harvester is in operation, elastic teeth on a picking roller of a harvesting header of the harvester pick fruits off and throw the fruits onto conveying belts on the left side and the right side of the header, the conveying belts on the two sides convey stem crops onto conveying belts inside the gap bridge, the conveying belts throw the stem crops onto the upper front cleaning roller assembly 530, long straws and stem crops which are not completely removed enter the re-threshing roller device along the upper front cleaning roller assembly 530, and the rest materials fall onto the lower cleaning assembly 540 from gaps between the upper front cleaning roller assembly 530; the stem crops entering the re-threshing roller structure enter a meshing area between the first re-threshing roller 410 and the fourth re-threshing roller 440 along the upper surface of the roller concave plate 300 under the action of the rod teeth of the first re-threshing roller 410, the rotating speed and the linear speed of the fourth re-threshing roller 440 are greater than those of the first re-threshing roller 410, the rotating direction is opposite to that of the first re-threshing roller 410, the fruits remained on the stems of the stem crops are repeatedly picked for one time by utilizing the speed difference between the two rollers, the stem crops after the picking enter the meshing area between the second re-threshing roller 420 and the fourth re-threshing roller 440, the rotating speed of the fourth re-threshing roller 440 is greater than that of the second re-threshing roller 420, the rotating direction is opposite to that of the second re-threshing roller 420, the fruits remained on the stems of the stem crops are repeatedly picked for two times by utilizing the speed difference between the rollers, the stem crops after the picking enter the meshing area between the third re-threshing roller 430 and the fourth re-threshing roller 440, the rotation speed of the fourth re-threshing roller 440 is greater than that of the third re-threshing roller 430, the rotation direction is opposite to that of the third re-threshing roller 430, the residual fruits on the stems of the stem crops are repeatedly picked for three times by utilizing the speed difference between the rollers, and the stems of the stem crops brought back by the third re-threshing roller 430 are combed and brushed under the action of the cover plate 210 and the fixed teeth 220 to prevent forward returning; after picking, the stem crops are thrown onto the upper back cleaning roller assembly 550 through the gap between the fourth re-threshing roller 440 and the third re-threshing roller 430, and the re-threshed fruits, leaves and short stems fall onto the cylindrical elevator 560 and the lower cleaning assembly 540 through the gap between the upper back cleaning roller assembly 550; the stalk crop material entering the lower cleaning assembly 540 discharges soil, small crushed leaves and impurities in the material to the outside of the machine body from the gap between the lower cleaning rollers under the action of the lower cleaning rollers, and the rest of the material enters the cylinder elevator 560 along the lower cleaning rollers; a cleaning fan assembly 590 is arranged below the lower cleaning assembly 540 for cleaning and separating the materials from the lower cleaning roller in specific gravity, the light small straws and leaves are blown out of the machine body by the cleaning fan assembly 590, the dry fruits are conveyed to the rear elevator 570 by the scraper blade on the cylinder elevator 560, and then the materials are conveyed to the granary in the middle of the machine body by the rubber scraper blade of the rear elevator 570; the re-threshing long straws are conveyed into the rear straw collecting box 600 through the upper rear cleaning roller assembly 550, automatic discharging is realized after the long straws are full, and the straws are discharged into the ground according to piles, so that later-stage pulling and conveying and treatment are facilitated.

Experiments prove that the re-threshing roller structure and the harvester provided by the embodiment can effectively realize that fruits which are not completely removed are contained on the stems after the existing harvester is picked for picking for many times, the damage rate of the picked fruits is low, the integrity of the straws is good, the quality of the harvested fruits is effectively improved, the manual operation strength in the later period is reduced, the labor cost is saved, the impurity containing rate is reduced, and the re-threshing roller structure and the harvester are suitable for mechanical harvesting of products such as pepper, pepper or cotton bolls in different areas and different lines.

The harvester provided by the embodiment comprises the above-mentioned rethreshing roller structure, the technical characteristics of the rethreshing roller structure disclosed in the above are also applicable to the harvester, and the technical characteristics of the rethreshing roller structure disclosed in the above are not described repeatedly. The harvester of this embodiment has the advantages of the above-described rethreshing drum structure, and the advantages of the rethreshing drum structure disclosed above will not be described repeatedly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A rethreshing roller structure is characterized by comprising a roller bracket; the roller bracket is connected with a fixed tooth assembly, a roller concave plate and a roller assembly; the fixed tooth assembly is positioned above the roller assembly, and the roller concave plate is positioned below the roller assembly;

the roller assembly comprises a first re-threshing roller, a second re-threshing roller, a third re-threshing roller and a fourth re-threshing roller which can rotate around respective axes; the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are sequentially arranged along the circumferential direction of the fourth re-threshing roller, and meshing areas for picking fruits are respectively arranged between the first re-threshing roller, the second re-threshing roller and the third re-threshing roller and the fourth re-threshing roller;

when the machine works, the rotating directions of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are opposite to the rotating direction of the fourth re-threshing roller, and the rotating speeds of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are all smaller than the rotating speed of the fourth re-threshing roller.

2. The redraw drum arrangement according to claim 1, wherein said fourth redraw drum is provided with a drum drive wheel for driving connection with a drive mechanism, and with a fourth drive wheel for driving connection with said first, second and third redraw drums.

3. The redraw drum arrangement according to claim 2, wherein the first redraw drum, the second redraw drum, the third redraw drum and the fourth redraw drum each comprise a drum shaft, a drum shell and picking teeth;

the roller shell is sleeved and fixed on the roller shaft; the fruit picking teeth are uniformly distributed on the outer surface of the roller shell;

the first re-threshing roller, the second re-threshing roller and the third re-threshing roller respectively comprise a driven transmission wheel; the driven driving wheel is sleeved and fixed at one end of the roller shaft and is in transmission connection with the fourth driving wheel;

the drum driving wheel is sleeved at one end of a drum shaft of the fourth re-threshing drum, and the fourth driving wheel is sleeved and fixed at the other end of the drum shaft of the fourth re-threshing drum.

4. The redraw drum structure of claim 3, wherein a safety clutch is arranged between the drum driving wheel and the drum shaft of the fourth redraw drum; the safety clutch is used for separating the drum driving wheel from the drum shaft of the fourth re-threshing drum when the torque of the drum shaft of the fourth re-threshing drum is higher than a preset value so as to cut off the power input to the drum shaft of the fourth re-threshing drum by the driving mechanism;

and/or the fruit picking teeth of the first re-threshing roller, the second re-threshing roller and the third re-threshing roller are respectively arranged in a staggered manner with the fruit picking teeth of the fourth re-threshing roller; the fruit picking teeth of the first re-threshing roller and the third re-threshing roller are respectively arranged in a staggered mode with the fruit picking teeth of the second re-threshing roller.

5. The compound-threshing cylinder structure of claim 3, wherein the fixed-tooth assembly includes a cover plate and fixed teeth fixedly connected with the cover plate; the fixed teeth are arranged below the cover plate;

and a meshing area is arranged between the fixed teeth and the third re-threshing roller, and the fixed teeth and the fruit picking teeth of the third re-threshing roller are arranged in a staggered mode.

6. The redrawing drum structure of claim 1, wherein the drum cradle comprises a drum connecting beam, a drum right side wall and a drum left side wall; the first re-threshing cylinder, the second re-threshing cylinder, the third re-threshing cylinder and the fourth re-threshing cylinder are all arranged between the right side wall of the cylinder and the left side wall of the cylinder; the roller right side wall and the roller left side wall are respectively fixedly connected with the roller connecting beam.

7. The compound doffer drum structure of claim 1, wherein said drum deck comprises a first arcuate portion and a second arcuate portion; the first arc-shaped part is matched with the outer contour of the first re-threshing roller in shape, and the second arc-shaped part is matched with the outer contour of the fourth re-threshing roller in shape; the joint of the first arc-shaped part and the second arc-shaped part is positioned below the meshing area of the first re-threshing roller and the fourth re-threshing roller;

and/or the roller concave plate is a closed concave plate.

8. The redraw drum arrangement according to claim 1, wherein the first and fourth redraw drums are both located below the second and third redraw drums;

in operation, the first rethreshing drum is capable of transporting the stalks on the drum deck to an engagement region between the first rethreshing drum and the fourth rethreshing drum.

9. A harvester comprising a body and a rethreshing drum structure as claimed in any one of claims 1 to 8;

the re-threshing roller structure is arranged inside the machine body.

10. A harvester according to claim 9, characterised in that an upper front cleaning roll assembly is provided within the body corresponding to the drum recess and the first rethreshing drum position, and is located above the drum recess;

a lower cleaning assembly is arranged in the machine body and is positioned below the upper front cleaning roller assembly and the roller concave plate;

an upper rear cleaning roller assembly corresponding to the positions of the roller concave plate and the fourth re-threshing roller is arranged in the machine body, and the upper rear cleaning roller assembly is positioned below an engaging area of the third re-threshing roller and the fourth re-threshing roller;

a cylinder elevator, a rear elevator and a driving mechanism are also arranged in the machine body;

the cylinder elevator is positioned below the upper rear cleaning roll assembly, and the output end of the lower cleaning assembly is positioned above the cylinder elevator; the cylinder elevator can ascend and convey objects to the rear elevator;

the driving mechanism is in driving connection with the fourth re-threshing roller;

a grass collecting box is arranged below the output end of the upper back cleaning roller assembly;

a cleaning fan assembly is arranged below the lower cleaning assembly.

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