Universal rice and wheat combine harvester suitable for complex terrain

Abstract

The present application relates to the technical field of agricultural machinery. Disclosed is a universal rice and wheat combine harvester suitable for complex terrain, comprising a harvester body, wherein a traveling drive mechanism is provided below the harvester body, and a header, a conveying mechanism and a threshing mechanism are mounted on the harvester body; connecting plates are articulated on both sides of the header, and an auger conveyor and a reel are rotationally connected to the inner side of the header; the reel comprises a rotating shaft and a reel wheel, with the rotating shaft being rotationally connected between the two connecting plates; a reel adjustment component is mounted between each connecting plate and the header, and is configured to adjust the height of the reel; and the reel wheel is fixed on the rotating shaft, and fingers of the reel wheel are slidably connected to reel rods of the reel wheel by means of collars and are fastened by means of fasteners. The reel adjustment components enable the reel wheel to effectively guide crops towards a cutter bar, thereby reducing missed cuts. The auger conveyor concentrates cut crops towards the center and then conveys same to the conveying mechanism, thereby preventing accumulation and blockages, improving the conveying efficiency, and ensuring that crops can smoothly enter the threshing mechanism.

Description

General rice and wheat combine harvester suitable for complex terrain

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 2025107344357, filed on June 4, 2025, and entitled "Hilly Combined Harvester", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of agricultural machinery, more particularly to a general rice and wheat combine harvester suitable for complex terrain. BACKGROUND

[0004] In the field of agricultural harvesting, especially in hilly areas, the performance and adaptability of the harvester are crucial for improving the efficiency and quality of harvesting. The existing harvesters have some limitations in design and function, mainly in the following aspects:

[0005] The height of the traditional harvester header is fixed and cannot be adjusted according to the ups and downs of the ground in hilly areas and the height of the crops; this leads to insufficient fitting of the header to the ground during harvesting, uneven cutting, and even missing cutting, affecting the quality and efficiency of harvesting. In addition, the height of the existing crop divaricator is fixed and cannot be adjusted according to the height of the crops, which varies due to the terrain and growth conditions in actual operation, making it difficult for the fixed crop divaricator height to adapt to these changes and affecting the harvesting effect.

[0006] Therefore, how to provide a harvester that can effectively adapt to complex terrain and adjust in real time according to the different growth conditions of crops is a problem that needs to be solved by those skilled in the art. SUMMARY

[0007] Therefore, the present application provides a general rice and wheat combine harvester suitable for complex terrain, which aims to at least solve one of the above technical problems.

[0008] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0009] The utility model provides a kind of general rice and wheat combine harvester suitable for complex terrain, including machine body, the walking driving mechanism is below the machine body, cutting table, conveying mechanism and threshing mechanism are installed on the machine body;The cutting table both sides are hinged with connecting plate, and its inboard rotation is connected with spiral conveyor and sweep, the sweep includes rotating shaft and sweep wheel, the rotating shaft rotation is connected between two the connecting plate, connecting plate and the cutting table between installation sweep adjusting assembly, for adjusting the height of sweep;The sweep wheel is fixed on the rotating shaft, the sweep tooth of sweep wheel is slidably connected on sweep bar of sweep wheel by sleeve ring, and is fastened by fastener.

[0010] Through the above technical scheme, in the general rice and wheat combine harvester suitable for complex terrain provided by the utility model, the height of cutting table is adjusted by cutting table adjusting assembly, to ensure that the stubble height is stable when harvesting on hilly slope, the height of cutting table can be automatically adjusted according to the ups and downs of hilly terrain and crop height, to ensure that cutting table always maintains appropriate distance from ground, to improve the uniformity of cutting and harvesting quality;Reduce the phenomenon of missing cutting or crop dumping due to uneven terrain, sweep adjusting assembly enables sweep wheel to effectively sweep crops towards cutting knife, to reduce the phenomenon of missing cutting, to improve harvesting effect, spiral conveyor conveys the cut crops to conveying mechanism after concentrating in the center, to prevent accumulation and blockage, to improve conveying efficiency, to ensure that crops can smoothly enter threshing mechanism;Especially suitable for hilly operation of small plots and scattered crops.

[0011] Preferably, in the above general rice and wheat combine harvester suitable for complex terrain, the sweep wheel further includes a disc, the number of discs is two, two discs are fixed on both ends of the rotating shaft, the number of sweep bars is multiple, multiple sweep bars are axially arranged between two discs, the number of sleeve rings is multiple, multiple sleeve rings are slidably connected on the sweep bar, the sweep tooth is fixed on the sleeve ring, and the sleeve ring and the sweep bar are fastened by bolts. The position of sweep tooth on sweep bar is adjusted by sliding sleeve ring to adapt to the sweeping needs of crops of different heights.

[0012] Preferably, in the above general rice and wheat combine harvester suitable for complex terrain, the sweep adjusting assembly is a first electric push rod, the number of first electric push rods is two, the fixed ends of two first electric push rods are fixed on the top edges of both sides of the cutting table, and the telescopic ends of the first electric push rods are fixedly connected with the connecting plate. The setting of first electric push rod can realize automatic adjustment of the height of sweep, to adjust the position of sweep in real time according to the height of crops, so that sweep wheel can always effectively sweep crops, to improve sweeping effect;The first electric push rods on both sides are synchronously telescopic, to effectively reduce the inclination of sweep wheel, to ensure that sweep tooth uniformly contacts crop layer.

[0013] Preferably, in the universal rice-wheat combine harvester suitable for complex terrains, a header adjusting assembly is installed between the header and the machine body to adjust the height of the header.

[0014] Preferably, in the universal rice-wheat combine harvester suitable for complex terrains, the header adjusting assembly is a second electric push rod, the fixed end of the second electric push rod is fixed on the machine body, and the telescopic end of the second electric push rod is fixedly connected with the header. The height of the header is adjusted in real time during travel to adapt to continuous changes in slope, ensuring that the header always maintains the optimal cutting angle with the ground, reducing problems such as uneven cutting and missed cutting caused by improper header height, and improving harvesting efficiency and quality.

[0015] Preferably, in the universal rice-wheat combine harvester suitable for complex terrains, the conveying mechanism is installed on the machine body, the inlet end of the conveying mechanism corresponds to the spiral conveyor, and the outlet end of the conveying mechanism corresponds to the threshing mechanism. The spiral conveyor directly guides the crops from the header into the inlet of the threshing mechanism, reducing material loss in the intermediate transfer link.

[0016] Preferably, in the universal rice-wheat combine harvester suitable for complex terrains, the threshing mechanism includes a feeding drum and a threshing drum, the feeding drum is rotationally connected to the machine body and is perpendicular to the conveying path of the conveying mechanism, the feeding drum corresponds to the outlet end of the conveying mechanism, and the threshing drum is rotationally connected to the machine body and is vertically arranged on the side of the feeding drum away from the conveying mechanism. A concave sieve is fixed on the machine body, located below the threshing drum and forming a threshing gap with the threshing drum. The feeding drum is perpendicular to the conveying path of the conveying mechanism, which can effectively prevent material accumulation, the threshing drum is vertically arranged on the side of the feeding drum, which can ensure that the crops smoothly enter the threshing drum for threshing, improving the threshing efficiency; the concave sieve and the threshing drum form a threshing gap, which helps to separate the grains from the straw, improving the threshing effect and the purity of the grains.

[0017] Preferably, in the universal rice-wheat combine harvester suitable for complex terrains, the number of threshing drums is two, and the two threshing drums are arranged in parallel, and a spiral arrangement of threshing protruding strips and spikes is fixed on the outer side wall of each threshing drum. The threshing protruding strips perform rough threshing, and the spikes complete fine threshing, reducing the rate of unthreshed grains; the double drums share the threshing resistance, reducing the power fluctuations caused by single drum overload, suitable for low uniform speed operation scenarios in hilly terrain; the spiral arrangement of threshing protruding strips pushes the crops to move axially, extending the threshing path and improving the uniformity of threshing; the spiral arrangement of spikes destroys the fiber structure of the straw, reducing the winding of the straw on the surface of the drum, and maintaining the threshing efficiency.

[0018] Preferably, in the above-mentioned universal rice-wheat combine harvester suitable for complex terrain, the machine body has a multi-stage vibration screen below the concave sieve, a fan is installed on one side of the multi-stage vibration screen and close to one side of the conveying mechanism, and the air duct of the fan corresponds to the multi-stage vibration screen. The multi-stage vibration screen can perform multi-stage screening on the grains, further separate the grains and impurities, and ensure the purity of the grains; the fan can provide airflow to help separate light impurities and improve the cleaning effect; the air duct of the fan is targetedly aligned with the screen surface, reducing energy waste caused by full-area blowing.

[0019] Preferably, in the above-mentioned universal rice-wheat combine harvester suitable for complex terrain, the multi-stage vibration screen has a collection groove below the multi-stage vibration screen, and the collection groove conveys the collected grains to the grain collection bin on the machine body through a transmission mechanism. The grains separated by the multi-stage vibration screen automatically fall into the collection groove and are sent to the grain collection bin through the transmission mechanism, reducing manual intervention; the transmission mechanism adopts a closed transmission path, effectively reducing grain scattering during conveying, and is especially suitable for hilly and bumpy road conditions.

[0020] Preferably, in the above-mentioned universal rice-wheat combine harvester suitable for complex terrain, the walking driving mechanism adopts a tracked walking mechanism.

[0021] According to the above technical solution, compared with the prior art, the application discloses a universal rice-wheat combine harvester suitable for complex terrain, which has the following beneficial effects:

[0022] 1. The application independently adjusts the cutting table and the reel through an electric push rod, realizes dynamic adaptation of the cutting height and the reel depth, makes the harvester adapt to the complex terrain of hilly areas in real time, ensures that the cutting table always maintains the optimal distance from the ground, improves cutting uniformity, reduces missed cutting, significantly enhances the terrain adaptability of the harvester, and is suitable for hilly areas.

[0023] 2. The threshing mechanism of the application adopts a double-threshing cylinder design, each threshing cylinder is combined with a threshing protruding strip and a spike, and high-efficiency threshing is realized through rubbing and impact, which significantly improves the threshing efficiency and grain purity, thereby improving the overall harvesting efficiency.

[0024] 3. The multi-stage vibration screen and the fan below the machine body of the application work cooperatively, further improve the purity of the grains through multi-stage screening and airflow separation, and reduce the mixing of impurities; the design of the collection groove and the transmission mechanism ensures that the grains can be smoothly collected and conveyed to the grain collection bin after cleaning, reduces grain loss, and improves grain collection quality. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be drawn for part of the embodiments of the present application, and for the ordinary skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0026] Fig. 1 is a schematic diagram of the structure of the hilly combine harvester provided by the present application.

[0027] Fig. 2 is a schematic diagram of the structure of the rake provided by the present application.

[0028] Fig. 3 is an enlarged view of section A of Fig. 2.

[0029] Fig. 4 is a schematic diagram of the structure of the detachment mechanism, multi-stage vibration plate and fan provided by the present application.

[0030] Wherein: 1 - machine body; 11 - concave screen; 12 - multi-stage vibration screen; 13 - cab; 14 - mounting bracket; 2 - walking driving mechanism; 3 - header; 31 - connecting plate; 32 - screw conveyor; 33 - rake; 331 - rotating shaft; 332 - rake wheel; 3321 - rake tooth; 3322 - collar; 3323 - rake rod; 3324 - disc; 3325 - bolt; 34 - reciprocating cutter; 4 - conveying mechanism; 5 - threshing mechanism; 51 - feeding drum; 52 - threshing drum; 521 - threshing protruding strip; 522 - spike tooth; 6 - rake adjusting assembly; 7 - fan; 8 - collection tank; 81 - screw conveyor; 9 - grain collection bin; 10 - discharge cylinder. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the ordinary skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Referring to FIG. 1 to FIG. 4, the embodiment of the present application discloses a general rice and wheat combine harvester suitable for complex terrain, comprising a machine body 1, a walking driving mechanism 2 below the machine body 1, a cutting table 3, a conveying mechanism 4 and a threshing mechanism 5 installed on the machine body 1; the cutting table 3 is hingedly connected with connecting plates 31 on both sides, and the inner side is rotatably connected with a spiral conveyor 32 and a swather 33; the swather 33 comprises a rotating shaft 331 and a swather reel 332, the rotating shaft 331 is rotatably connected between the two connecting plates 31, so that the rotating shaft 331 can rotate relative to the connecting plates 31; a swather adjusting assembly 6 is installed between the connecting plates 31 and the cutting table 3; the swather reel 332 is fixed on the rotating shaft 331, the swaths 3321 of the swather reel 332 are slidably connected on the swaths 3323 of the swather reel 332 through the sleeves 3322, and are fastened through fasteners, when the swather adjusting assembly 6 is extended or retracted, the connecting plates 31 drive the swather 33 to ascend or descend, thereby adjusting the height of the swather 33.

[0033] In order to further optimize the above technical solution, the driving mechanism of the rotating shaft 331 is not shown in the figure, and synchronous belt or other transmission modes can be used to drive the rotating shaft 331.

[0034] In order to further optimize the above technical solution, the walking driving mechanism 2 adopts a tracked walking driving mechanism 2.

[0035] In order to further optimize the above technical solution, the cutting width of the cutting table 3 is 1.8m, equipped with a reciprocating cutter 34, and the cutting stroke is 76mm; the reciprocating cutter 34 can adopt a driving crank connecting mechanism to realize the reciprocating motion of the reciprocating cutter, so as to realize the cutting of crops.

[0036] In order to further optimize the above technical solution, the connecting plates 31 adopt steel plates with a thickness of 10mm, and are hingedly connected on both sides of the cutting table 3, and the hinge points are provided with self-lubricating bearings.

[0037] In order to further optimize the above technical solution, the swather reel 332 further comprises a disc 3324; the number of the discs 3324 is two, the two discs 3324 are fixed on both ends of the rotating shaft 331, the number of the swaths 3323 is multiple, and the multiple swaths 3323 are arranged circumferentially between the two discs 3324; the number of the sleeves 3322 is multiple, the multiple sleeves 3322 are slidably connected on the swaths 3323, the swaths 3321 are fixed on the sleeves 3322, and the sleeves 3322 and the swaths 3323 are fastened through the bolts 3325.

[0038] In order to further optimize the above technical scheme, the rotating shaft 331 is connected to the two side connecting plates 31 through a needle bearing; the rake wheel 332 comprises six rake rods 3323 which are uniformly distributed between the two discs 3324; the rake teeth 3321 are adjusted in position through a sleeve ring 3322, and a spring washer is added after the bolt 3325 is fastened to prevent loosening; the number of the rake teeth 3321 is determined according to actual conditions.

[0039] In order to further optimize the above technical scheme, the rake adjusting assembly 6 is a first electric push rod, the number of the first electric push rods is two, and the fixed ends of the two first electric push rods are fixed on the top edges on the two sides of the header 3, and the telescopic ends of the first electric push rods are fixedly connected with the connecting plates 31.

[0040] In order to further optimize the above technical scheme, the header adjusting assembly is installed between the header 3 and the machine body 1, and is used for adjusting the height of the header 3.

[0041] In order to further optimize the above technical scheme, the header adjusting assembly is a second electric push rod, the fixed end of the second electric push rod is fixed on the machine body 1, and the telescopic end of the second electric push rod is fixedly connected with the header 3.

[0042] In order to further optimize the above technical scheme, the connecting mode between the telescopic end of the second electric push rod and the header 3 is a ball joint, so that the header 3 can be adjusted in height at any time according to the terrain, so as to adapt to different terrains, and a corresponding sensor is also installed on the header 3, the sensor is a terrain monitoring special sensor, is used for monitoring the terrain, and feeds back to a control unit, and the second electric push rod is controlled by the control unit to adjust the height of the header 3.

[0043] In order to further optimize the above technical scheme, the conveying mechanism 4 is installed on the machine body 1, the inlet end of the conveying mechanism 4 corresponds to the spiral conveyor 32, and the outlet end thereof corresponds to the threshing mechanism 5.

[0044] In order to further optimize the above technical scheme, the threshing mechanism 5 comprises a feeding drum 51 and a threshing drum 52, the feeding drum 51 is rotationally connected to the machine body 1 and is perpendicular to the conveying path of the conveying mechanism 4, the feeding drum 51 corresponds to the outlet end of the conveying mechanism 4, and the threshing drum 52 is rotationally connected to the machine body 1 and is arranged vertically on the side of the feeding drum 51 away from the conveying mechanism 4, cooperates with the feeding drum 51, can uniformly feed crops into the threshing drum 52, and realizes threshing; a concave sieve 11 is installed on the machine body 1, and is located below the threshing drum 52 and forms a threshing gap with the threshing drum 52.

[0045] In order to further optimize the above technical scheme, the conveying mechanism 4 adopts an inclined scraper conveyor with an inclination angle of 30°, the inlet end receives the outlet of the spiral conveyor 32, and the outlet end corresponds to the feeding drum 51.

[0046] In order to further optimize the above technical scheme, the diameter of the feeding roller 51 is 400 mm, and the rotating speed is 350 rpm, which is perpendicular to the conveying direction of the conveying mechanism 4.

[0047] In order to further optimize the above technical scheme, the number of the threshing rollers 52 is two, and the two threshing rollers 52 are arranged in parallel, and the outer side wall of each threshing roller 52 is fixed with the threshing protruding strips 521 and the spikes 522 arranged in a spiral.

[0048] In order to further optimize the above technical scheme, the concave screen 11 is installed on the machine body 1 through the mounting frame 14, and is provided with a concave screen adjusting assembly for adjusting the size of the threshing gap. The concave screen adjusting assembly can adopt different structural forms, such as a hydraulic cylinder or a screw rod or an electric push rod, which can meet the height adjustment of the concave screen 11, and details are not described herein.

[0049] In order to further optimize the above technical scheme, the screen hole diameters of the concave screen 11 located at the threshing protruding strips 521 and the spikes 522 can be different.

[0050] In order to further optimize the above technical scheme, the machine body 1 and the lower part of the concave screen 11 are provided with a multi-stage vibration screen 12, and a fan 7 is installed on one side of the multi-stage vibration screen 12 and close to the conveying mechanism 4, and the air duct of the fan 7 corresponds to the multi-stage vibration screen 12.

[0051] In order to further optimize the above technical scheme, the multi-stage vibration screen 12 includes a receiving plate 121, a fish scale screen 122 and a woven screen 123 arranged in sequence from top to bottom; (the specific transmission mode is not shown in the figure, and the structure of the transmission mode is prior art, which is not described herein).

[0052] In order to further optimize the above technical scheme, the fan 7 adopts a centrifugal fan, and the air duct is aligned with the multi-stage vibration screen.

[0053] In order to further optimize the above technical scheme, the lower part of the multi-stage vibration screen 12 is provided with a collecting groove 8, and the collecting groove 8 conveys the collected grains to a grain collecting bin 9 on the machine body 1 through a transmission mechanism.

[0054] In order to further optimize the above technical scheme, the collecting groove 8 can have a U-shaped groove bottom, the groove width is 400 mm, a spiral elevator 81 is installed at the bottom, and the spiral elevator 81 combines with a spiral device arranged upwardly in the machine body 1 to lift the grains from the collecting groove 8 to the grain collecting bin 9; a sensor is installed in the grain collecting bin 9 to monitor whether the grains inside reach a specified height, and a discharge cylinder 10 is installed at the top of the grain collecting bin 9, and the discharge cylinder 10 has a spiral conveyor to realize the discharge of the grain collecting bin 9.

[0055] In order to further optimize the above technical solutions, a control unit electrically connected with all the above-mentioned components is further included, the control unit receives corresponding signals and controls corresponding components to make corresponding adjustments, such as the walking speed of the walking driving mechanism 2, the rotating speed of the rotating shaft 331, the screw conveyor 32, the conveying mechanism 4, the feeding roller 51, the threshing roller 52, and other parameter information of other components.

[0056] In order to further optimize the above technical solutions, the machine body 1 is provided with a cab 13, and the cab 13 is internally provided with corresponding operation buttons, which can control corresponding parameter control or adjustment.

[0057] Embodiments of the present application are:

[0058] When working in different terrains, the corresponding height of the header 3 is adjusted by the second electric push rod according to the actual situation, and the height of the reel 332 is adjusted by the first electric push rod; the crops are cut by the reciprocating cutter 34 and conveyed to the conveying mechanism 4 by the screw conveyor 32; the crops are conveyed to the feeding roller 51 by the conveying mechanism 4, and after the crops are flattened by the feeding roller 51, the crops enter the threshing roller 52, and the threshing is completed by the threshing roller 52; the threshed materials fall into the multi-stage vibration screen 12 through the concave screen 11; the fan 7 blows off light impurities, and the grains are screened and then fall into the collection tank 8; the grains are sent into the grain collection bin 9 by the screw conveyor; when the grain collection bin 9 is full, the grains are unloaded by the screw conveyor in the unloading cylinder 10.

[0059] The structures not mentioned in the present application are prior art.

[0060] In the present specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between each embodiment can be referred to each other. For the device disclosed by the embodiments, since it corresponds to the method disclosed by the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0061] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A universal rice-wheat combine suitable for complex terrain, comprising a machine body (1) having a walking driving mechanism (2) below, a header (3), a conveying mechanism (4) and a threshing mechanism (5) mounted on the machine body (1); characterized in that, Both sides of the cutting platform (3) are hinged with connecting plates (31), and the inner side is rotationally connected with a spiral conveyor (32) and a swather (33); the swather (33) comprises a rotating shaft (331) and a swather wheel (332), the rotating shaft (331) is rotationally connected between the two connecting plates (31), a swather adjusting assembly (6) is installed between the connecting plates (31) and the cutting platform (3) for adjusting the height of the swather (33); the swather wheel (332) is fixed on the rotating shaft (331), the swather teeth (3321) of the swather wheel (332) are slidingly connected on the swather rods (3323) of the swather wheel (332) through a sleeve ring (3322) and are fastened by a fastener.

2. A general purpose rice-wheat combine harvester suitable for complex terrains as claimed in claim 1, wherein, The swather wheel (332) further comprises a disc (3324); the number of the discs (3324) is two, the two discs (3324) are fixed on both ends of the rotating shaft (331), the number of the swather rods (3323) is multiple, and the multiple swather rods (3323) are arranged circumferentially between the two discs (3324); the number of the sleeve rings (3322) is multiple, the multiple sleeve rings (3322) are slidingly connected on the swather rods (3323), the swather teeth (3321) are fixed on the sleeve rings (3322), and the sleeve rings (3322) and the swather rods (3323) are fastened by bolts (3325).

3. A general purpose rice and wheat combine harvester suitable for complex terrains as claimed in claim 1, wherein, The swather adjusting assembly (6) is a first electric push rod, the fixed ends of the two first electric push rods are fixed on the top edges of the two sides of the cutting platform (3) respectively, and the telescopic ends of the first electric push rods are fixedly connected with the connecting plates (31).

4. The universal combine harvester for rice and wheat suitable for complex terrains as claimed in claim 1 wherein, A cutting platform adjusting assembly is further included, which is installed between the cutting platform (3) and the machine body (1) and is used for adjusting the height of the cutting platform (3).

5. A general purpose rice-wheat combine harvester suitable for complex terrains as claimed in claim 4, wherein, The cutting platform adjusting assembly is a second electric push rod, the fixed end of the second electric push rod is fixed on the machine body (1), and the telescopic end of the second electric push rod is fixedly connected with the cutting platform (3).

6. The universal rice and wheat combine harvester suitable for complex terrains as claimed in claim 1 wherein, The conveying mechanism (4) is installed on the machine body (1), the inlet end of the conveying mechanism (4) corresponds to the spiral conveyor (32), and the outlet end corresponds to the threshing mechanism (5).

7. A general purpose rice-wheat combine harvester suitable for complex terrains as claimed in claim 6, wherein, The threshing mechanism (5) comprises a feeding drum (51) and a threshing drum (52), the feeding drum (51) is rotationally connected on the machine body (1) and is perpendicular to the conveying path of the conveying mechanism (4), the feeding drum (51) corresponds to the outlet end of the conveying mechanism (4), the threshing drum (52) is rotationally connected on the machine body (1) and is arranged vertically on the side of the feeding drum (51) away from the conveying mechanism (4), a concave sieve (11) is installed on the machine body (1), the concave sieve (11) is located below the threshing drum (52) and forms a threshing gap with the threshing drum (52).

8. A general purpose rice-wheat combine harvester suitable for complex terrains as claimed in claim 7, wherein, The number of the threshing cylinder (52) is two, two said threshing cylinder (52) is arranged in parallel, each said threshing cylinder (52) on the outer side wall is fixed with spiral arrangement of threshing protruding strip (521) and spike (522).

9. A general purpose rice-wheat combine harvester suitable for complex terrains as claimed in claim 7, wherein, The body (1) and below the concave screen (11) have a multi-stage vibrating screen (12), one side of the multi-stage vibrating screen (12) and close to the conveying mechanism (4) side is provided with a fan (7), the air duct (71) of the fan (7) corresponds to the multi-stage vibrating screen (12).

10. The universal rice and wheat combine harvester suitable for complex terrains as claimed in claim 9 wherein, The lower side of the multi-stage vibrating screen (12) has a collecting groove (8), the collecting groove (8) is transmitted to the grain collecting bin (9) on the body (1) by the transmission mechanism.

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