CN217523272U - Diameter-variable double-roller combined rape thresher - Google Patents

Abstract

The utility model relates to the technical field of agricultural material separation, in particular to a reducing double-roller combined rape thresher, which comprises a frame, a feeding component, a processing component and a discharging component; fixedly connected with threshing screen frame and threshing screen frame in the frame, threshing screen frame corresponds on the screen frame with threshing and is provided with threshing screen and threshing screen respectively, be provided with threshing cylinder in the processing subassembly and take off the grass cylinder, threshing cylinder passes through drive assembly with threshing cylinder and links to each other, threshing cylinder's radius is greater than the radius of threshing cylinder, this disclosure sets up threshing cylinder and threshing cylinder, set up corresponding threshing and threshing screen simultaneously, can improve the threshing treatment effect to the rape ear of grain greatly, it can make things convenient for the high efficiency to transport the granule that is handled well to set up the pay-off screw axis simultaneously, improve the whole operating efficiency of threshing, this disclosure sets up the fan at last, supplementary rape grain that can etc. carry out the secondary and wash the discharge, improve the degree of automation of arranging material and the purity of finished product rape seed.

Description

Diameter-variable double-roller combined rape thresher

Technical Field

The utility model relates to an agricultural material separation technical field especially relates to a reducing twin drum combination rape thresher.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

The thresher is called as a harvesting machine, which is a machine capable of separating crop seeds from stalks, mainly a grain crop harvesting machine. The thresher is of different types according to different grain materials. For example, the rice thresher is suitable for threshing rice; for threshing corn, a so-called "corn thresher" or the like is used. The thresher is commonly called a 'thresher', and is the most common rice threshing machine. After the rice is harvested, the rice grains are separated from the stalks by the machine. The rice thresher is divided into two types, one type is driven by manpower, is called as a manpower rice thresher and is a semi-mechanized tool; another type of rice thresher is powered, and is called a "powered rice thresher". The rice thresher greatly reduces the labor intensity of rice harvesting and improves the agricultural productivity at the same time.

Based on the appearance of a rice thresher, an automatic trend is also generated in the agricultural products about rape separation processing, in order to improve the threshing of the rape and remove straws and the like, in the prior art, a single-stage or single-stage separation separator is provided, the separator can separate the fed rape ears, although the separated rapeseeds and the like can be obtained, the problems of poor separation effect, incomplete threshing degree and the like are found in practical use, so that the rape separation operation cannot achieve high-efficiency operation, and a large amount of manpower is required for assistance.

SUMMERY OF THE UTILITY MODEL

The inventor finds out through research that: in the actual separation production of the rape, more manpower is needed for auxiliary operation, the threshing effect of the rape ears is poor after the auxiliary operation, a large amount of unhooked rapeseeds and the like exist, and meanwhile, the conventional threshing machine or separator has larger volume and is inconvenient to use in the use and moving process.

The purpose of the disclosure is to provide a reducing double-roller combined rape thresher, which jointly performs threshing and separation by arranging a threshing sieve frame, a grass threshing sieve frame, a threshing screen and a grass threshing screen, and solves the technical problem that the threshing machine cannot achieve higher threshing size when threshing towards the rape ears in the prior art, and simultaneously solves the problem that the threshing machine in the prior art is large in size and inconvenient to move.

According to one aspect of the present disclosure, there is provided a diameter-variable twin drum combination rape thresher including: the device comprises a device body, wherein a feeding assembly, a processing assembly and a discharging assembly which are sequentially and movably connected onto a rack are arranged in the device body, a threshing sieve frame with a cutter and a grass-removing sieve frame are fixedly connected onto the rack, a threshing screen and a grass-removing screen are respectively and correspondingly arranged on the threshing sieve frame and the grass-removing sieve frame, and a connecting screen can be detachably connected between the threshing screen and the grass-removing screen; the feeding assembly comprises a feeding hopper cover and a feeding hopper which are sequentially arranged from top to bottom, and the feeding hopper cover is fixedly connected with the feeding hopper; the processing assembly is internally provided with a threshing cylinder and a grass-removing cylinder, the threshing cylinder is connected with the grass-removing cylinder through a transmission assembly, and the threshing cylinder drives the grass-removing cylinder to rotate when rotating; the radius of the threshing cylinder is larger than that of the threshing cylinder; and the discharging component comprises a special-shaped grass-removing opening.

In some embodiments of the present disclosure, a tapered material collecting bin for collecting materials is further fixedly connected to the frame, and a feeding screw shaft penetrates through the bottom of the material collecting bin.

In some embodiments of the disclosure, a threshing cylinder shaft is connected in the threshing cylinder in a through manner, wherein a threshing belt pulley, a first fixing frame, a belt seat aligning bearing, a threshing anti-winding end cover, a threshing connecting end cover, a threshing cylinder supporting plate, a bearing and a bearing seat are sequentially arranged along the axial direction of the threshing cylinder shaft; the first fixing frame, the threshing anti-winding end cover and the threshing connecting end cover are symmetrically arranged at two ends of the threshing cylinder.

In some embodiments of the present disclosure, the peripheral surface of the threshing cylinder is provided with a threshing tooth post connecting shaft and a plurality of threshing tooth posts uniformly distributed at intervals on the threshing tooth post connecting shaft.

In some embodiments of the present disclosure, a feeding plate is fixedly connected to an end portion of the outer circumference of the threshing cylinder, and the feeding plate is annularly arrayed on the outer circumference of the threshing cylinder.

In some embodiments of the present disclosure, a grass-removing roller shaft is connected in the grass-removing roller in a through manner, wherein a grass-removing belt wheel, a bearing seat, a second fixing frame, a grass-removing anti-winding end cover, a grass-removing connecting end cover, a grass-removing support plate and a grass-removing conveying screw are sequentially arranged along the axial direction of the grass-removing roller shaft; the bearing, the bearing seat, the second fixing frame, the grass removing anti-winding end cover and the grass removing connecting end cover are symmetrically arranged at two ends of the grass removing roller.

In some embodiments of the present disclosure, a plurality of grass-removing guide tooth columns are uniformly distributed on the peripheral surface of the grass-removing roller at intervals.

In some embodiments of the present disclosure, a plurality of grass-removing plates are disposed beside the grass-removing guide tooth column, and the plurality of grass-removing plates are annularly arrayed on the outer circumferential surface of the grass-removing roller.

In some embodiments of the present disclosure, a feeding belt pulley, a bearing set, a feeding spiral sheet, a hopper, and a fan are sequentially disposed on the feeding spiral shaft along an axial direction, wherein the bearing set is symmetrically disposed at two ends of the feeding spiral shaft; a lifting blade gasket and a lifting blade movably connected with the lifting blade gasket are fixedly connected in the hopper; the fan shell is detachably connected to the periphery of the fan, a plurality of fan blades are rotatably connected to the interior of the fan, and the end portion of each fan blade is connected to the spiral feeding shaft.

In some embodiments of the present disclosure, the transmission assembly includes a threshing guide bar, a threshing guide bar and a power wheel, wherein the threshing guide bar and the threshing guide bar run synchronously, and the power wheel is configured to transmit the threshing cylinder and the threshing cylinder.

Compared with the prior art, the method has the following advantages and beneficial effects: this openly sets up and takes off grass cylinder and threshing cylinder, sets up corresponding threshing simultaneously and takes off the grass screen cloth, can improve the threshing treatment effect to the rape ear of grain greatly, sets up the pay-off screw axle simultaneously and can make things convenient for the high efficiency to transport the granule that will handle, improves the whole operating efficiency who threshes, and this disclosure at last sets up the fan, and supplementary rape grain that can etc. carry out the secondary and wash the discharge, improves the pure degree of arranging material degree of automation and finished product rape seed.

Drawings

FIG. 1 is a schematic diagram of the structure of the device of the present invention;

FIG. 2 is a schematic view of the threshing cylinder of the present invention;

FIG. 3 is a schematic view of the grass-removing drum of the present invention;

fig. 4 is a schematic view of a feed screw shaft according to the present invention;

FIG. 5 is a photograph of the actual product of the present invention;

fig. 6 is a schematic diagram of the transmission mode of the device of the present invention.

Illustration of the drawings:

1-a feed hopper cover;

2-a threshing cylinder; 201-a threshing belt pulley; 202-self-aligning bearing with seat; 203-a first mount; 204-threshing anti-winding end cover; 205-threshing connecting end cover; 206-threshing teeth column; 207-threshing cylinder shaft; 208-threshing toothed column connecting shaft; 209-threshing cylinder supporting plate; 210-a feeding plate; 211-a first bearing; 212-a first bearing seat;

21-threshing guide bar; 22-a cutter; 23-threshing sieve frame; 24-a threshing sieve frame;

3-threshing roller; 301-a sod removal pulley; 302-a second bearing; 303-a second bearing block; 304-a second mount; 305-removing grass and preventing winding end covers; 306-weeding connecting end covers; 307-grass removal plate; 308-grass removal guide tooth column; 309-threshing roller shaft; 310-a grass-removing support plate; 311-a threshing conveying screw;

31-a grass removal guide bar; 32-a threshing sieve frame; 33-a grass-removing sieve frame;

4-a machine cover; 5-special-shaped grass-removing openings; 6-connecting a screen mesh;

7-a material collecting bin; 71-screw axis of feed; 711-feeding belt pulley; 712-a bearing set; 713-feeding screw; 714-a hopper; 715-raising plate gaskets; 716-a material raising plate; 717-fan case; 718-a fan; 719-Fan blades;

8-a frame; 9-a feed hopper; 10-power wheel.

Detailed Description

Referring to the accompanying drawings 1-6 for the overall understanding of the device of the present invention, the present embodiment provides a diameter-variable twin-drum combined rape thresher which is already in the actual production stage.

In the following paragraphs, different aspects of the embodiments are defined in more detail. Aspects so defined may be combined with any other aspect or aspects unless clearly indicated to the contrary. In particular, any feature considered to be preferred or advantageous may be combined with one or more other features considered to be preferred or advantageous. The terms "first", "second", and the like in the present invention are used for convenience of description only to distinguish different constituent elements having the same name, and do not indicate a sequential or primary-secondary relationship.

Example 1

In at least some embodiments of the present disclosure, reference is made to the accompanying description of fig. 1, which includes: the device comprises a device body, wherein the device body comprises a feeding component, a processing component and a discharging component which are sequentially and movably connected to a rack 8; the movable connection mode comprises a quick-change connection mode, a limiting connection mode, a semi-permanent threaded connection mode and the like, in order to improve the moving use efficiency of the device and guarantee the use stress strength of the device in the actual use process, the better embodiment mode of the embodiment is the threaded detachable connection mode, the stress strength is guaranteed, meanwhile, the dismounting and moving efficiency of the whole machine can be improved, and therefore the applicant can conduct adaptive structural adjustment on the device according to different use environments in the actual use process, and corresponding materials can be conveniently processed or collected.

In another preferred embodiment of the present invention, referring to fig. 1, a cover 4 is movably disposed on a frame 8, the cover 4 can be disposed to shield dust, and the cover 4 can be detached to achieve flexible detachment; meanwhile, when the device is actually used, a push rod and a moving wheel are arranged on the machine frame 8, so that the device is convenient to move, and reference is made to the attached figure 5 for description.

Fixedly connected with has cutter 22's threshing screen frame 23 in order to take off grass screen frame 33 on frame 8, cutter 22 connects on threshing screen frame 23, can carry out the cutting to the rape ear of grain and handle, certainly according to actual need, also can connect cutter 22 at the device its with can go on or need carry out the position of cutting processing, the erection joint position of this embodiment preferred is on threshing screen frame 23, this is the anticlockwise rotation for cooperation threshing cylinder 2, carry out the cutting of rape ear of grain, concrete working process does, get into back in the device of this disclosure when the rape ear of grain, threshing cylinder 2 can transport it, threshing cylinder 2 presents anticlockwise rotation this moment, transport the rape ear of grain, cutter 22 can cut the preliminary processing with the rape ear of grain this moment. The shape of the cutting knife 22 may be a common rectangle, or may also be an unconventional polygon, such as a trapezoid, a rhombus, etc., and the preferred embodiment of the present embodiment is a rounded rectangle, and it should be noted that the cutting knife 22 may also be replaced with a structure that can perform cutting separation, such as scissors, a cutting strip, etc.

Threshing sieve frame 23 and threshing sieve frame 33 are last to correspond respectively and to be provided with threshing screen 24 and threshing sieve screen 32, still can dismantle between threshing screen 24 and the threshing sieve screen 32 and be connected with connecting screen 6, wherein threshing screen 24 and threshing sieve screen 32 can carry out the adaptability adjustment and change, the principle of changing is the particle size of screening object, the screening object of this embodiment preferred is the rape seed, consequently select the screen cloth that accords with the standard to use, carry out the separation of inferior rape seed through the sieve mesh of seting up on the screen cloth, when carrying out the screening of cereal such as all the other rice, wheat, jowar and soybean, it can to carry out the screen cloth of correspondence and select the change. The arrangement of the connecting screen 6 can ensure the connection bearing strength of the grass threshing screen 32 and the threshing screen 24 and can assist in screening oilseed rape seeds left by the part in the transportation process from the threshing cylinder to the grass threshing cylinder, and it needs to be noted that the threshing screen 24, the grass threshing screen 32 and the connecting screen 6 in the embodiment are all provided with the same screen mesh aperture, so as to ensure the screening efficiency during the replacement, the threshing screen, the grass threshing screen 32 and the connecting screen 6 are required to be replaced together, and certainly, the unified replacement can not be carried out, and the adaptability adjustment and selection can be carried out according to the actual needs.

The feeding subassembly, the feeding subassembly is including feeding hopper cover 1 and feeder hopper 9 that set up from top to bottom in proper order, feeding hopper cover 1 and feeder hopper 9 fixed connection, wherein feeding hopper cover 1's shape is the wedge, make things convenient for the entering of rape ear, certainly also can replace for the rectangle, it is cylindrical etc. feeding hopper cover 1 adopts fixed connection's mode with feeder hopper 9, be in order to guarantee the higher joint strength in the device operation course of working, therefore this embodiment has adopted the mode of screw fastening connection to go on, certainly also can adopt the buckle, mode such as round pin hub connection, in the actual operation, put into feeder hopper 9 the rape ear can, it needs to explain, in order to guarantee the higher efficiency operation and the operation degree of safety of device, the inventor can carry out artificial length control with the rape ear in advance when using the device, control is less than 60 centimeters, and when carrying out the rape ear input, adopt the uninterrupted to feed in succession and evenly.

A processing assembly, wherein a threshing cylinder 2 and a grass-removing cylinder 3 are arranged in the processing assembly, the threshing cylinder 2 is connected with the grass-removing cylinder 3 through a transmission assembly, wherein the threshing cylinder 2 drives the grass-removing cylinder 3 to rotate when rotating, and the synchronous transmission is set, so as to ensure the stability of the transmission ratio and the transmission efficiency in the transmission process, reduce the loss of transmission energy, and improve the mechanical efficiency, it is to be noted that the transmission process of the threshing cylinder 2 and the grass-removing cylinder 3 can refer to the description of the attached drawing 6, specifically, in the actual operation, a power supply in the device can drive a power wheel 10, wherein the power supply in the device is an external power supply or an internal connection, the connection mode is the same as the conventional mode in the prior art, and is not repeated, the power supply drives the power wheel 10, then the power wheel 10 can drive a turf threshing belt pulley 201 to rotate, at the moment, the threshing belt pulley 201 can drive a threshing belt pulley 301 to rotate through belt transmission, so as to form a synchronous belt to rotate, and meanwhile, the radius of the threshing cylinder 2 is larger than that of the grass-removing cylinder 3; an accelerating system can be formed, the rotating efficiency is increased, and the grass discharging effect is improved.

The discharging assembly comprises a special-shaped grass removing opening 5, the preferred shape of the embodiment is a wedge-shaped grass removing opening, a conical material collecting bin 7 for collecting materials is fixedly connected to the rack 8, a feeding screw shaft 71 penetrates through the bottom of the material collecting bin 7, the material collecting bin 7 is arranged for collecting rapeseeds after threshing, and the specific process is that when rape ears are treated by a corresponding threshing roller and a corresponding grass removing roller, the rapeseeds fall into the material collecting bin 7, the dropped rapeseeds are collected on the feeding screw shaft 71, and the feeding screw shaft 71 conveys the rapeseeds to a discharging and collecting position to be discharged.

Referring to the description of fig. 2, a threshing cylinder shaft 207 is connected through the inside of the threshing cylinder 2, wherein a threshing belt pulley 201, a first fixing frame 203, a self-aligning bearing 202 with a seat, a threshing anti-winding end cover 204, a threshing connecting end cover 205, a threshing cylinder supporting plate 209, a first bearing 211 and a first bearing seat 212 are sequentially arranged along the axial direction of the threshing cylinder shaft 207; the first fixing frame 203, the threshing anti-winding end cover 204 and the threshing connecting end cover 205 are symmetrically arranged at two ends of the threshing cylinder 2.

Example 2

Only the differences from example 1 are explained in this section, and at least the following embodiments are included: threshing cylinder 2 periphery is installed threshing teeth post connecting axle 208 and interval equipartition a plurality of threshing teeth post 206 on threshing teeth post connecting axle 208, and threshing teeth post 206 can carry out the direction operation to the rape ear, and wherein threshing teeth post 206's interval equipartition mode can be equidistant rectangle interval, equidistant cyclic annular interval etc. and this embodiment combines threshing cylinder 2's shape and actual operation processing needs, sets up to the cyclic annular interval of equidistance.

Example 3

Only differences from example 2 are explained in this section, and at least the following implementation modes are included: the peripheral end of the threshing cylinder 2 is fixedly connected with a feeding plate 210, and the feeding plate 210 is arranged on the peripheral surface of the threshing cylinder 2 in an annular array.

Example 4

Only differences from example 3 are explained in this section, and at least the following implementation modes are included: referring to the accompanying drawing 3, a grass removing roller shaft 309 is connected in the grass removing roller 3 in a penetrating manner, wherein a grass removing belt wheel 301, a bearing 302, a bearing seat 303, a second fixing frame 304, a grass removing anti-winding end cover 305, a grass removing connecting end cover 306, a grass removing support plate 310 and a grass removing conveying screw 311 are sequentially arranged along the axial direction of the grass removing roller shaft 309; wherein, the first bearing 302, the second bearing seat 303, the second fixing frame 304, the grass-removing anti-winding end cover 305 and the grass-removing connecting end cover 306 are symmetrically arranged at two ends of the grass-removing roller 3.

Example 5

Only differences from example 4 are explained in this section, and at least the following embodiments are included: a plurality of grass-removing guide tooth columns 308 are evenly distributed on the peripheral surface of the grass-removing roller 3 at intervals. A plurality of grass-removing plates 307 are arranged beside the grass-removing guide toothed column 308, and the grass-removing plates 307 are annularly arrayed on the outer peripheral surface of the grass-removing roller 3.

Example 6

Only differences from example 5 are explained in this section, and at least the following embodiments are included: referring to fig. 4, a feed pulley 711, a bearing set 712, a feed screw 713, a hopper 714, and a fan 718 are sequentially disposed on the feed screw shaft 71 in an axial direction, wherein the bearing sets 712 are symmetrically disposed at both ends of the feed screw shaft 71; a lifting blade gasket 715 and a lifting blade 716 movably connected with the lifting blade gasket 715 are fixedly connected in the hopper 714; the periphery of the fan 718 is detachably connected with a fan shell 717, the inside of the fan 718 is rotatably connected with a plurality of fan blades 719, the end part of each fan blade 719 is connected to the feeding screw shaft 71, it should be noted that the inside of the rapeseeds subjected to threshing treatment inevitably has a lot of broken slag of shells and rods, and the inventor carries out secondary cleaning processing by combining the fan and the fan impeller provided in the embodiment based on the fact that the operation process is as follows: when the processed rapeseeds are fed into the fan through the spiral feeder, the fan can drive the fan impeller to rotate to generate rotating cyclone, substances with different masses can move in different directions and at different heights, substances such as the rod and the shell can enter the residue discharge position to be discharged, and the rest rapeseeds can fall off and be collected.

Example 7

Only differences from example 1 are explained in this section, and at least the following embodiments are included: referring to the description of fig. 1, the transmission assembly comprises a threshing guide bar 21, a grass threshing guide bar 31 and a power wheel 9, wherein the threshing guide bar 21 and the grass threshing guide bar 31 run synchronously, and the power wheel 9 is configured to transmit a threshing cylinder 2 and a grass threshing cylinder 3 with reference to the description of fig. 6.

Based on the above embodiment, the actual operation process of the present disclosure is: during operation, the harvested rape ears are uniformly placed into the feed hopper by manpower, enter the processing assembly, and under the combined processing operation of the threshing cylinder, the grass discharging cylinder, the threshing screen and the grass discharging screen, rapeseed is obtained, then feeding and spiral transmission are carried out, and the rapeseed is sent into the fan for secondary cleaning treatment, and shells, rods and the like are discharged, so that clean rapeseed is obtained.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. A diameter-variable double-roller combined rape thresher is characterized by comprising: the device comprises a device body, wherein a feeding assembly, a processing assembly and a discharging assembly which are sequentially and movably connected to a rack (8) are arranged in the device body;

a threshing sieve frame (23) with a cutter (22) and a grass-removing sieve frame (33) are fixedly connected to the frame (8), a threshing screen (24) and a grass-removing screen (32) are respectively and correspondingly arranged on the threshing sieve frame (23) and the grass-removing sieve frame (33), and a connecting screen (6) can be detachably connected between the threshing screen (24) and the grass-removing screen (32);

the feeding assembly comprises a feeding hopper cover (1) and a feeding hopper (9) which are sequentially arranged from top to bottom, and the feeding hopper cover (1) is fixedly connected with the feeding hopper (9);

the processing assembly is internally provided with a threshing cylinder (2) and a grass-removing cylinder (3), the threshing cylinder (2) is connected with the grass-removing cylinder (3) through a transmission assembly, and the threshing cylinder (2) drives the grass-removing cylinder (3) to rotate when rotating; the radius of the threshing cylinder (2) is larger than that of the threshing cylinder (3); and

the discharging component comprises a special-shaped grass-removing opening (5).

2. The diameter-variable double-roller combined rape thresher of claim 1, wherein a conical material collecting bin (7) for collecting materials is fixedly connected to the frame (8), and a feeding screw shaft (71) penetrates through the bottom of the material collecting bin (7).

3. The diameter-variable double-roller combined rape thresher according to claim 1, wherein a threshing roller shaft (207) is connected in the threshing roller (2) in a penetrating manner, wherein a threshing belt pulley (201), a first fixing frame (203), a self-aligning bearing with a seat (202), a threshing anti-winding end cover (204), a threshing connecting end cover (205), a threshing roller supporting plate (209), a first bearing (211) and a first bearing seat (212) are sequentially arranged along the axial direction of the threshing roller shaft (207);

the first fixing frame (203), the threshing anti-winding end cover (204) and the threshing connecting end cover (205) are symmetrically arranged at two ends of the threshing cylinder (2).

4. The diameter-variable double-roller combined rape thresher of claim 1 or 3, wherein the outer peripheral surface of the threshing roller (2) is provided with a threshing tooth post connecting shaft (208) and a plurality of threshing tooth posts (206) which are uniformly distributed on the threshing tooth post connecting shaft (208) at intervals.

5. The diameter-variable double-roller combined rape thresher of claim 3, wherein a feeding plate (210) is fixedly connected to the peripheral end of the threshing cylinder (2), and the feeding plate (210) is annularly arrayed on the peripheral surface of the threshing cylinder (2).

6. The diameter-variable double-roller combined rape thresher according to claim 1, wherein a weed removing roller shaft (309) is connected in the weed removing roller (3) in a penetrating manner, and a turf removing belt wheel (301), a second bearing (302), a second bearing seat (303), a second fixing frame (304), a weed removing anti-winding end cover (305), a weed removing connecting end cover (306), a weed removing support plate (310) and a weed removing conveying screw (311) are sequentially arranged along the axial direction of the weed removing roller shaft (309);

the second bearing (302), the second bearing seat (303), the second fixing frame (304), the grass-removing anti-winding end cover (305) and the grass-removing connecting end cover (306) are symmetrically arranged at two ends of the grass-removing roller (3).

7. The diameter-variable double-roller combined rape thresher of claim 1 or 6, wherein a plurality of weed-removing guide tooth columns (308) are uniformly distributed on the outer peripheral surface of the weed-removing roller (3) at intervals.

8. The reducer double-roller combined rape thresher according to claim 7, wherein a plurality of weed removing plates (307) are arranged beside the weed removing guide tooth column (308), and the plurality of weed removing plates (307) are annularly arrayed on the outer peripheral surface of the weed removing roller (3).

9. The diameter-variable double-roller combined rape thresher as claimed in claim 2, wherein a feeding belt pulley (711), a bearing set (712), a feeding screw blade (713), a hopper (714) and a fan (718) are sequentially arranged on said feeding screw shaft (71) along the axial direction, wherein said bearing sets (712) are symmetrically arranged at two ends of said feeding screw shaft (71);

a lifting blade gasket (715) and a lifting blade (716) movably connected with the lifting blade gasket (715) are fixedly connected in the hopper (714);

the outer periphery of the fan (718) is detachably connected with a fan shell (717), a plurality of fan blades (719) are rotatably connected inside the fan (718), and the end part of each fan blade (719) is connected to the spiral feeding shaft (71).

10. The variable diameter twin drum combination rape thresher of claim 1, wherein the transmission assembly comprises a threshing guide bar (21), a threshing guide bar (31) and a power wheel (10), wherein the threshing guide bar (21) and the threshing guide bar (31) operate synchronously, and the power wheel (10) is configured to drive the threshing drum (2) and the threshing drum (3).

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