Two-section type conical threshing cylinder for full-feeding rice harvester

Abstract

The utility model relates to the field of harvesters, in particular to a two-section type conical threshing cylinder used on a full-feeding rice harvester. Comprising a feeding section, a threshing front section and a threshing rear section which are coaxial. The feeding section comprises a guide conical barrel and two levorotatory auger blades; the threshing front section comprises a front disc, a middle disc and a plurality of first threshing toothed bars, the front ends of the first threshing toothed bars are all arranged on the circumference of the front disc, and the rear ends of the first threshing toothed bars are all arranged on the outer circle of the middle disc. The rear threshing section comprises a rear disc and a plurality of second threshing toothed bars, the front ends of the second threshing toothed bars are all arranged on the inner circle of the middle disc, and the rear ends of the second threshing toothed bars are all arranged on the circumference of the rear disc. Due to the design that the guide conical cylinder is matched with the auger blade, smooth circulation at the feeding position of the threshing cylinder can be achieved, rice can enter the threshing cylinder more quickly, and the blocking phenomenon caused by rice blocking is reduced.

Description

Technical Field

[0001] The utility model relates to the field of harvesters, in particular to a two-stage conical threshing drum used on a full-feed rice harvester. Background Art

[0002] The improvement of rice harvester operating capacity is of great significance to the development of agricultural mechanization in my country, and will help improve rice harvesting efficiency and ensure my country's food security.

[0003] The rice threshing drum is one of the core components of the rice harvester, and its performance determines the working performance of the rice harvester. During operation, the rice stalks and rice ears are fed into the rotating threshing drum, which rubs and impacts them, and separates the rice grains from the rice stalks through the beating of the tooth rod and the combing of the tooth nails. Because the rice threshing drum has a long operating stroke, it has ample threshing and separation time, so that an ideal threshing effect can be achieved.

[0004] But the problem is that the operating time of rice harvesters is relatively concentrated, and the short-term operating intensity of the whole machine is high. In addition, due to uncertain factors such as unstable harvesting speed and high humidity of rice stalks during operation, problems such as blockage at the feeding point of the threshing drum and damage to the threshing gear rod often occur, leading to machine failure, affecting harvesting efficiency and even causing production losses. Therefore, avoiding blockage and damage of the threshing drum is a prerequisite for ensuring efficient harvesting of rice harvesters. Utility Model Content

[0005] The utility model provides a two-stage conical threshing drum for a full-feed rice harvester, which aims to solve the problems of easy blockage at the feeding position of the existing threshing drum and difficult maintenance of damaged threshing gear rods, so as to improve the harvesting efficiency.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] The utility model provides a two-stage conical threshing drum for a full-feed rice harvester, comprising a feeding section, a front threshing section fixedly arranged at the rear end of the feeding section, and a rear threshing section fixedly arranged at the rear end of the front threshing section, wherein the feeding section, the front threshing section and the rear threshing section are coaxial;

[0008] The feeding section comprises a guide cone and two left-handed dragon blades arranged on the outer circumference of the guide cone, wherein the two dragon blades are arranged at intervals and each occupies half of the circumference;

[0009] The threshing front section comprises a front disc, an intermediate disc with an outer diameter larger than the diameter of the front disc, and a plurality of threshing tooth rods 1, the front ends of the plurality of threshing tooth rods 1 are all arranged on the circumference of the front disc, the rear ends of the plurality of threshing tooth rods 1 are all arranged on the outer circumference of the intermediate disc, and the threshing tooth rods 1 are arranged obliquely to the left; a threshing tooth nail group 1 is arranged on the plurality of threshing tooth rods 1, and the plurality of threshing tooth rods 1 are evenly arranged and have the same rotational motion trajectory;

[0010] The rear threshing section comprises a rear width disk having a diameter greater than the inner diameter of the middle width disk and a plurality of threshing tooth rods 2, the front ends of the plurality of threshing tooth rods 2 are arranged on the inner circle of the middle width disk, the rear ends of the plurality of threshing tooth rods 2 are arranged on the circumference of the rear width disk, and the threshing tooth rods 2 are arranged obliquely to the left; a plurality of threshing tooth rods 2 are arranged with a threshing tooth nail group 2, and the plurality of threshing tooth rods 2 are evenly arranged and have the same rotational motion trajectory.

[0011] Furthermore, the feeding section also includes a front baffle, and the guide conical cylinder is fixed on the back side of the front baffle and is coaxial.

[0012] Furthermore, the feeding section is connected and fixed to the threshing front section via a front shaft.

[0013] Furthermore, the front section of threshing also includes a supporting width disk 1, the front width disk and the supporting width disk 1 are welded and fixed by a connecting tube, and the supporting width disk 1 is also welded and fixed to the middle width disk by a connecting tube; the diameter of the supporting width disk 1 is larger than the diameter of the front width disk, and the outer circle diameter of the middle width disk is larger than the diameter of the supporting width disk 1; six semicircular slots are arranged on the circumference of the front width disk and the circumference of the supporting width disk 1 at intervals of sixty degrees, and six semicircular slots are arranged on the outer circle of the middle width disk at intervals of sixty degrees.

[0014] Furthermore, there are a total of six threshing tooth rods, one end of which is embedded in the semicircular groove of the front width disk and fixed to the front width disk by the cooperation of bolts and a fixing plate, the other end of which is embedded in the semicircular groove of the outer circle of the middle width disk and fixed to the middle width disk by the cooperation of bolts and a fixing plate, and the middle part of which is embedded in the semicircular groove of the supporting width disk and fixed to the supporting width disk by the cooperation of bolts and a fixing plate.

[0015] Furthermore, in the side view, the threshing tooth rod 1 expands outward, and the angle between the threshing tooth rod 1 and the axis of the threshing front section is 5°; in the top view, the threshing tooth rod 1 is tilted to the left, and the angle between the threshing tooth rod 1 and the axis of the threshing front section is 5°.

[0016] Furthermore, the rear section of threshing also includes a second supporting width plate, the middle width plate and the second supporting width plate are welded and fixed via a connecting tube, and the second supporting width plate is also welded and fixed to the rear width plate via a connecting tube; the diameter of the second supporting width plate is larger than the diameter of the inner circle of the middle width plate, and the diameter of the rear width plate is larger than the diameter of the second supporting width plate; six semicircular slots are arranged on the circumference of the second supporting width plate and the circumference of the rear width plate at intervals of sixty degrees, and six semicircular slots are arranged on the inner circle of the middle width plate at intervals of sixty degrees.

[0017] Furthermore, there are six threshing tooth rods 2, one end of which is embedded in the semicircular groove of the inner circle of the middle width disk and fixed to the middle width disk by the cooperation of bolts and a fixing plate, the other end of which is embedded in the semicircular groove of the rear width disk and fixed to the rear width disk by the cooperation of bolts and a fixing plate, and the middle part of which is embedded in the semicircular groove of the supporting width disk 2 and fixed to the supporting width disk 2 by the cooperation of bolts and a fixing plate.

[0018] Furthermore, in the side view, the threshing tooth rod 2 expands outward, and the angle between the threshing tooth rod 2 and the axis of the threshing rear section is 1°; in the top view, the threshing tooth rod 2 deflects to the left, and the angle between the threshing tooth rod 2 and the axis of the threshing rear section is 5°.

[0019] Furthermore, a key sleeve is provided at the center of the rear disc, and the rear axle is fixed on the rear disc through the cooperation of the key and the key sleeve.

[0020] The beneficial effects achieved by the utility model are:

[0021] 1) The design of the guiding cone and the dragon blades can achieve smooth flow at the feeding point of the threshing drum, allowing rice to enter the threshing drum faster and reduce blockage caused by rice congestion;

[0022] 2) The large taper design of the front section of the threshing drum increases the radial space at the front end of the front section of the threshing drum, which can accommodate more rice and avoid clogging of the drum;

[0023] 3) The design of the small taper of the rear section of the threshing drum is to reduce the taper to 1° in order to allow a larger radial space at the front end of the rear section of the threshing drum, thereby preventing blockage and performing a more detailed re-threshing of the rice that has been threshed for the first time;

[0024] 4) The threshing gear rod is designed to rotate 5 degrees to the left. When it rotates, it is similar to a spiral rod, which produces a backward thrust on the rice, so that the rice stalks are pushed back and discharged from the threshing drum faster, avoiding clogging due to long stay time in the drum;

[0025] 5) The design of the tooth nails: a threshing tooth nail group consisting of 10 tooth nails that become shorter from front to back can make the circumference of the tooth nails consistent when they are installed on the threshing drum;

[0026] 6) The tooth rod and tooth nail are detachable. Due to the complex conditions of rice fields and the fact that rice stalks block the bottom of the field, foreign objects such as stones and abandoned farm tools may follow the rice into the harvester, causing damage to the tooth rod, tooth nails and even the width plate of the threshing drum, affecting the operation. Most of the existing tooth rods are directly welded to the width plate. When the threshing tooth rod or tooth nail is damaged, it is difficult to replace and the cost is high. Each threshing tooth rod on this drum is fixed to the width plate by three fixing plates through bolts. When a tooth rod is damaged, only the bolts need to be removed to replace the tooth rod, thereby improving the stability of the drum and the maintenance speed, saving costs.

[0027] 7) The two-stage design of the threshing drum can realize two threshing processes for rice, thereby improving the rice threshing rate, avoiding insufficient threshing, and increasing grain yield BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0030] Figure 2 yes Figure 1 Enlarged view of part A in the middle (the first connecting tube is hidden).

[0031] Figure 3 It is a schematic diagram of the front axle structure of the utility model.

[0032] Figure 4 This is a schematic diagram of the feeding section structure of the utility model Figure 1 .

[0033] Figure 5 This is a schematic diagram of the feeding section structure of the utility model Figure 2 .

[0034] Figure 6 It is a side view of the threshing front section of the utility model.

[0035] Figure 7 It is a top view of the threshing front section of the utility model.

[0036] Figure 8 It is a stereogram of the front section of threshing of the utility model.

[0037] Fig. 9 It is a side view of the rear section of threshing of the utility model.

[0038] Fig.10 It is a top view of the rear section of threshing of the utility model.

[0039] Fig.11 It is a stereogram of the rear section of threshing of the utility model.

[0040] Fig.12 It is a front view of the middle width disc of the utility model.

[0041] Fig.13 It is a three-dimensional diagram of a supporting web plate 1 of the utility model.

[0042] Fig.14 It is a stereogram of the rear axle of the utility model.

[0043] Fig.15 It is a stereoscopic diagram of the connecting cylinder of the utility model.

[0044] In the figure, 1, front shaft; 2, feeding section; 201, front baffle; 202, guiding cone; 203, Jiaolong blade; 3, front section of threshing; 301, front width disk; 302, threshing tooth rod one; 303, threshing tooth nail group one; 304, supporting width disk one; 4, rear section of threshing; 401, supporting width disk two; 402, rear width disk; 403, threshing tooth rod two; 404, threshing tooth nail group two; 5, middle width disk; 501, outer circle; 6, rear shaft; 7, fixing plate; 8, connecting tube; 9, key sleeve; 10, key. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0046] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0047] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0048] The utility model provides a two-stage conical threshing drum for a full-feed rice harvester, which can be installed on the full-feed rice harvester for use, and can also be equipped with a cylindrical mesh screen outside its circumference for independent use.

[0049] like Figures 1 to 15 As shown, the two-stage conical threshing drum comprises a feeding section 2, a threshing front section 3 fixedly arranged at the rear end of the feeding section 2, and a threshing rear section 4 fixedly arranged at the rear end of the threshing front section 3, and the feeding section 2, the threshing front section 3 and the threshing rear section 4 are coaxial;

[0050] The feeding section 2 comprises a guide cone 202 and two left-handed dragon blades 203 arranged on the outer circumference of the guide cone 202, wherein the two dragon blades 203 are arranged at intervals and each occupies half of the circumference;

[0051] The threshing front section 3 comprises a front disc 301, an intermediate disc 5 whose outer circle 501 has a diameter larger than that of the front disc 301, and a plurality of threshing gear rods 302, the front ends of the plurality of threshing gear rods 302 are all arranged on the circumference of the front disc 301, the rear ends of the plurality of threshing gear rods 302 are all arranged on the outer circle 501 of the intermediate disc 5, and the threshing gear rods 302 are arranged obliquely to the left; a threshing gear nail group 303 is arranged on the plurality of threshing gear rods 302, and the plurality of threshing gear rods 302 are evenly arranged and have the same rotational motion trajectory;

[0052] The threshing rear section 4 includes a rear width disk 402 whose diameter is larger than the inner diameter of the middle width disk 5 and a plurality of threshing tooth rods 403, the front ends of the plurality of threshing tooth rods 403 are all arranged on the inner circle of the middle width disk 5, the rear ends of the plurality of threshing tooth rods 403 are all arranged on the circumference of the rear width disk 402, and the threshing tooth rods 403 are arranged obliquely to the left; a threshing tooth nail group 404 is arranged on the plurality of threshing tooth rods 403, and the plurality of threshing tooth rods 403 are evenly arranged and have the same rotational motion trajectory.

[0053] The feeding section 2 includes a front baffle 201, a guide cone 202 and two left-handed dragon blades 203, wherein the front baffle 201 is a circular plate, and the guide cone 202 is fixed on the back side of the front baffle 201 and is coaxial; the guide cone 202 is a hollow frustum-shaped structure, and the front end diameter of the guide cone 202 is smaller than the rear end diameter; the two dragon blades 203 are wound and spaced apart on the outer peripheral side of the guide cone 202, and each occupies half of the circumference, that is, one dragon blade 203 is spirally wound from the rear end of the guide cone 202 to the front end of the guide cone 202 and occupies 180° of the circumference.

[0054] Further, the feeding section 2 is connected and fixed with the threshing front section 3 through the front shaft 1. Specifically, the front shaft 1 is coaxial with the feeding section 2, the front end of the front shaft 1 passes through the key sleeve 9 fixed at the center of the front baffle 201 and is fixed to the front baffle 201 through the cooperation of the key 10 and the key sleeve 9, and the rear end of the front shaft 1 is embedded in the key sleeve 9 at the center of the front disc 301 and is fixed to the front disc 301 through the key 10; the feeding section 2 is realized to rotate synchronously with the threshing front section 3 through the front shaft 1.

[0055] The threshing front section 3 includes a front width disc 301, a supporting width disc 304, an intermediate width disc 5 and a plurality of threshing tooth rods 302, wherein the diameter of the supporting width disc 304 is larger than the diameter of the front width disc 301, and the diameter of the outer circle 501 of the intermediate width disc 5 is larger than the diameter of the supporting width disc 304; six semicircular slots are arranged on the circumference of the front width disc 301 and the circumference of the supporting width disc 304 at intervals of sixty degrees, and six semicircular slots are arranged on the outer circle 501 of the intermediate width disc 5 at intervals of sixty degrees; there are six threshing tooth rods 302 in total, and a threshing tooth nail group 303 is arranged on the threshing tooth rod 302, and the threshing tooth nail group 303 is ten tooth nails that are successively shorter from the front end to the rear end of the threshing front section 3 to ensure that the circumferential diameters of the outermost ends of the tooth nails are consistent.

[0056] Three fixing plates 7 are welded evenly spaced on each of the threshing tooth rods 302, and the three fixing plates 7 are respectively fixed to the end of the threshing tooth rod 302 close to the longest tooth nail, the middle and the end close to the shortest tooth nail; one end of the threshing tooth rod 302 is embedded in the semicircular groove of the front width disk 301 and is fixed to the front width disk 301 by the cooperation of bolts and the fixing plate 7, the other end of the threshing tooth rod 302 is embedded in the semicircular groove of the outer circle 501 of the middle width disk 5 and is fixed to the middle width disk 5 by the cooperation of bolts and the fixing plate 7, the middle part of the threshing tooth rod 302 is embedded in the semicircular groove of the supporting width disk 304 and is fixed to the supporting width disk 304 by the cooperation of bolts and the fixing plate 7; when the threshing front section 3 rotates, the rotational motion trajectories of the six threshing tooth rods 302 and the ten tooth nails thereon are the same.

[0057] Further, Figure 6 Taking the top threshing gear rod 1 302 as an example, in the side view, the threshing gear rod 1 302 expands outward (looking backward from the front plate 301), and the angle between the threshing gear rod 1 302 and the axis of the threshing front section 3 is 5°; Figure 7 Taking the same threshing gear rod 302 in the middle as an example, in the top view, the threshing gear rod 302 is tilted to the left (looking backward from the front plate 301), and the angle between the threshing gear rod 302 and the axis of the threshing front section 3 is 5°.

[0058] The front width disc 301 and the supporting width disc 1 304 are fixed by welding through the connecting tube 8, and the supporting width disc 1 304 is also fixed by welding to the middle width disc 5 through the connecting tube 8. The front width disc 301, the supporting width disc 1 304, the middle width disc 5 and the connecting tube 8 are all coaxial.

[0059] The rear threshing section 4 includes a supporting width disk 2 401, a rear width disk 402 and a plurality of threshing tooth rods 2 403, the diameter of the supporting width disk 2 401 is larger than the diameter of the inner circle of the intermediate width disk 5, and the diameter of the rear width disk 402 is larger than the diameter of the supporting width disk 2 401; six semicircular slots are arranged on the circumference of the supporting width disk 2 401 and the circumference of the rear width disk 402 at intervals of sixty degrees, and six semicircular slots are arranged on the inner circle of the intermediate width disk 5 at intervals of sixty degrees; there are six threshing tooth rods 403 in total, and a threshing tooth nail group 2 404 is arranged on the threshing tooth rod 403, and the threshing tooth nail group 2 404 consists of ten tooth nails that are successively shorter from the front end to the rear end of the rear threshing section 4 to ensure that the circumferential diameters of the outermost ends of the tooth nails are consistent.

[0060] Three fixing plates 7 are welded evenly spaced on each of the threshing tooth rods 403, and the three fixing plates 7 are respectively fixed to the end of the threshing tooth rods 403 close to the longest tooth nail, the middle and the end close to the shortest tooth nail; one end of the threshing tooth rods 403 is embedded in the semicircular groove of the inner circle of the middle width disk 5 and is fixed to the middle width disk 5 by the cooperation of bolts and the fixing plate 7, the other end of the threshing tooth rods 403 is embedded in the semicircular groove of the rear width disk 402 and is fixed to the rear width disk 402 by the cooperation of bolts and the fixing plate 7, the middle part of the threshing tooth rods 403 is embedded in the semicircular groove of the supporting width disk 401 and is fixed to the supporting width disk 401 by the cooperation of bolts and the fixing plate 7; when the threshing rear section 4 rotates, the rotational motion trajectories of the six threshing tooth rods 403 and the ten tooth nails thereon are the same.

[0061] Further, Fig. 9 Taking the top threshing gear rod 2 403 as an example, in the side view, the threshing gear rod 2 403 expands outward (looking backward from the middle width plate 5), and the angle between the threshing gear rod 2 403 and the axis of the threshing rear section 4 is 1°; Fig.10 Taking the same threshing gear rod 403 in the middle as an example, in the top view, the threshing gear rod 403 is tilted to the left (looking backward from the middle width plate 5), and the angle between the threshing gear rod 403 and the axis of the threshing rear section 4 is 5°.

[0062] The middle width disc 5 is fixed to the second supporting width disc 401 by welding through a connecting tube 8, and the second supporting width disc 401 is also fixed to the rear width disc 402 by welding through a connecting tube 8. The middle width disc 5, the second supporting width disc 401, the rear width disc 402 and the connecting tube 8 are all coaxial.

[0063] The middle width disc 5 is a gear-like structure as a whole, and the outer circle 501 of the middle width disc 5 is evenly provided with six semicircular slots at sixty degree intervals; the inner circle is also evenly provided with six semicircular slots at sixty degree intervals, and each semicircular slot on the outer circle 501 is thirty degrees apart from each circular slot on the inner circle.

[0064] The structure of the supporting web plate 1 304 is similar to that of the intermediate web plate 5 , except that no semicircular groove is provided on the inner circumference of the supporting web plate 1 304 .

[0065] A key sleeve 9 is provided at the center of the rear disc 402 , and the rear axle 6 is fixed on the rear disc 402 through the cooperation of a key 10 and the key sleeve 9 , and the rear axle 6 is coaxial with the rear disc 402 .

[0066] Specifically, the workflow of this utility model is:

[0067] During operation, the rice is harvested from the root by the harvester and sent into the rotating threshing drum. The rice first enters the feeding section 2. Since the front end of the guide cone 202 is thin and the rear end is thick, a large amount of rice can enter the feeding section 2 without being blocked. Under the action of the rotation of the left-handed dragon blade 203, the rice can smoothly enter the threshing front section 3 from the feeding section 2 without being blocked in the feeding section 2.

[0068] Since the six threshing gear rods 302 are arranged in a 5° cone shape, the radial space at the front end of the threshing front section 3 is relatively large, which can accommodate a large amount of rice and play a buffering role without clogging. When the threshing drum rotates, the six threshing gear rods 302 and the threshing gear nail group 303 thereon rub, beat, and comb the rice to separate the rice grains from the rice stalks. Since the six threshing gear rods 302 are arranged in a left-handed manner at a five-degree left angle, when they rotate, they are similar to a spiral rod, which generates a backward thrust on the first rice, pushing the first threshed rice backward, reducing its congestion in the threshing front section 3 and avoiding clogging of the threshing drum.

[0069] After the initial separation in the threshing front section 3, the rice enters the threshing rear section 4. The threshing tooth rod 2 403 of the threshing rear section 4 is distributed in a 1° cone shape. The purpose of reducing the taper to 1° is to allow the front end of the threshing rear section 4 to have a larger radial space to prevent blockage while performing more detailed re-threshing of the rice that has been threshed for the first time, thereby improving the overall threshing rate, preventing unnecessary losses caused by insufficient threshing, and increasing the yield. The six threshing tooth rods 2 403 are distributed in a left-handed manner at a 5-degree left angle like the front end. When they rotate, they are similar to spiral rods, generating a backward thrust on the re-threshed rice, so that the rice stalks after re-threshing are pushed backward faster and discharged from the threshing drum, reducing the space occupied by the rice stalks in the threshing rear section 4 and avoiding clogging of the threshing drum. This cycle is repeated to achieve the initial threshing and re-threshing of rice.

[0070] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A two-stage conical threshing drum for a full-feed rice harvester, characterized in that: It comprises a feeding section (2), a threshing front section (3) fixedly arranged at the rear end of the feeding section (2), and a threshing rear section (4) fixedly arranged at the rear end of the threshing front section (3), wherein the feeding section (2), the threshing front section (3) and the threshing rear section (4) are coaxial; The feeding section (2) comprises a guide cone (202) and two left-handed dragon blades (203) arranged on the outer circumference of the guide cone (202), wherein the two dragon blades (203) are arranged at intervals and each occupies half of the circumference; The threshing front section (3) comprises a front disc (301), an intermediate disc (5) whose outer circle (501) has a diameter greater than the diameter of the front disc (301), and a plurality of threshing tooth rods (302); the front ends of the plurality of threshing tooth rods (302) are all arranged on the circumference of the front disc (301); the rear ends of the plurality of threshing tooth rods (302) are all arranged on the outer circle (501) of the intermediate disc (5); the threshing tooth rods (302) are arranged obliquely to the left; a threshing tooth nail group (303) is arranged on the plurality of threshing tooth rods (302); the plurality of threshing tooth rods (302) are evenly arranged and have the same rotational motion trajectory; The threshing rear section (4) comprises a rear width disc (402) having a diameter greater than the inner diameter of the middle width disc (5) and a plurality of threshing tooth rods (403); the front ends of the plurality of threshing tooth rods (403) are arranged on the inner circle of the middle width disc (5); the rear ends of the plurality of threshing tooth rods (403) are arranged on the circumference of the rear width disc (402); the threshing tooth rods (403) are arranged obliquely to the left; the plurality of threshing tooth rods (403) are provided with a threshing tooth nail group (404); the plurality of threshing tooth rods (403) are evenly arranged and have the same rotational motion trajectory.

2. A two-stage conical threshing drum for a full-feed rice harvester according to claim 1, characterized in that: The feeding section (2) further comprises a front baffle (201), and the guide conical cylinder (202) is fixed on the back side of the front baffle (201) and is coaxial.

3. The two-stage conical threshing drum for a full-feed rice harvester according to claim 1, characterized in that: The feeding section (2) is connected and fixed to the threshing front section (3) via a front shaft (1).

4. The two-stage conical threshing drum for a full-feed rice harvester according to claim 1, characterized in that: The threshing front section (3) further comprises a supporting width disc (304); the front width disc (301) and the supporting width disc (304) are fixed by welding via a connecting tube (8); the supporting width disc (304) and the intermediate width disc (5) are also fixed by welding via a connecting tube (8); the diameter of the supporting width disc (304) is greater than the diameter of the front width disc (301); the diameter of the outer circle (501) of the intermediate width disc (5) is greater than the diameter of the supporting width disc (304); six semicircular slots are arranged on the circumference of the front width disc (301) and the circumference of the supporting width disc (304) at intervals of sixty degrees, and six semicircular slots are arranged on the outer circle (501) of the intermediate width disc (5) at intervals of sixty degrees.

5. A two-stage conical threshing drum for a full-feed rice harvester according to claim 4, characterized in that: There are six threshing tooth rods (302) in total. One end of the threshing tooth rod (302) is embedded in the semicircular groove of the front width disk (301) and is fixed to the front width disk (301) by the cooperation of bolts and a fixing plate (7). The other end of the threshing tooth rod (302) is embedded in the semicircular groove of the outer circle (501) of the middle width disk (5) and is fixed to the middle width disk (5) by the cooperation of bolts and a fixing plate (7). The middle part of the threshing tooth rod (302) is embedded in the semicircular groove of the supporting width disk (304) and is fixed to the supporting width disk (304) by the cooperation of bolts and a fixing plate (7).

6. A two-stage conical threshing drum for a full-feed rice harvester according to claim 1 or 5, characterized in that: In the side view, the threshing tooth rod 1 (302) expands outwards, and the angle between the threshing tooth rod 1 (302) and the axis of the threshing front section (3) is 5°; in the top view, the threshing tooth rod 1 (302) deflects to the left, and the angle between the threshing tooth rod 1 (302) and the axis of the threshing front section (3) is 5°.

7. The two-stage conical threshing drum for a full-feed rice harvester according to claim 1, characterized in that: The rear threshing section (4) further comprises a second supporting width disc (401), the middle width disc (5) and the second supporting width disc (401) are welded and fixed via a connecting tube (8), and the second supporting width disc (401) is also welded and fixed to the rear width disc (402) via a connecting tube (8); the diameter of the second supporting width disc (401) is greater than the diameter of the inner circle of the middle width disc (5), and the diameter of the rear width disc (402) is greater than the diameter of the second supporting width disc (401); six semicircular slots are arranged on the circumference of the second supporting width disc (401) and the circumference of the rear width disc (402) at intervals of sixty degrees, and six semicircular slots are arranged on the inner circle of the middle width disc (5) at intervals of sixty degrees.

8. The two-stage conical threshing drum for a full-feed rice harvester according to claim 7, characterized in that: There are six threshing tooth rods (403) in total. One end of the threshing tooth rod (403) is embedded in the semicircular groove of the inner circle of the middle width disk (5) and is fixed to the middle width disk (5) by the cooperation of bolts and a fixing plate (7). The other end of the threshing tooth rod (403) is embedded in the semicircular groove of the rear width disk (402) and is fixed to the rear width disk (402) by the cooperation of bolts and a fixing plate (7). The middle part of the threshing tooth rod (403) is embedded in the semicircular groove of the supporting width disk (401) and is fixed to the supporting width disk (401) by the cooperation of bolts and a fixing plate (7).

9. A two-stage conical threshing drum for a full-feed rice harvester according to claim 1 or 8, characterized in that: In the side view, the threshing tooth rod 2 (403) expands outwards, and the angle between the threshing tooth rod 2 (403) and the axis of the threshing rear section (4) is 1°; in the top view, the threshing tooth rod 2 (403) deflects to the left, and the angle between the threshing tooth rod 2 (403) and the axis of the threshing rear section (4) is 5°.

10. The two-stage conical threshing drum for a full-feed rice harvester according to claim 1, characterized in that: A key sleeve (9) is arranged at the center of the rear disc (402), and the rear shaft (6) is fixed on the rear disc (402) through the cooperation of a key (10) and the key sleeve (9).

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