Combine harvester transmission structure and combine harvester

Abstract

The utility model relates to the technical field of agricultural equipment, in particular to a combine harvester transmission structure and a combine harvester. The transmission structure of the combine harvester comprises an engine power output shaft which transmits power of an engine to the downstream; the engine power output shaft is in transmission connection with the main intermediate shaft; the main intermediate shaft is in transmission connection with the cleaning transmission shaft; the cleaning transmission shaft comprises a cleaning right side shaft and a cleaning left side shaft which are connected with each other; the right cleaning shaft is in transmission connection with the fan, the left cleaning shaft is in transmission connection with the seed elevator, and the seed elevator is in transmission connection with the impurity elevator and the screen box. In the transmission structure of the combine harvester, the cleaning right side shaft and the cleaning left side shaft jointly bear loads, the cleaning transmission shaft transmits power to the fan and the seed elevator, the loads of the cleaning transmission shaft can be reduced, and the transmission structure of the cleaning transmission shaft is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural equipment, in particular to a transmission structure of a combine harvester and a combine harvester. Background Technique

[0002] A combine harvester is a combined machine for harvesting crops, which can complete the processes of harvesting cereal crops, threshing, separating the stalks, removing impurities, shredding and spreading straw at one time, and directly obtain grains from the field, saving manpower and material resources and greatly reducing the burden on farmers.

[0003] For domestic large-scale grain combine harvesters, the overall transmission routes are different. Due to the limitations of the overall layout, the failure rate of the transmission devices of key working components is often relatively high, bringing relatively high maintenance costs to enterprises and customers.

[0004] The transmission of a combine harvester mainly includes main transmission, header transmission, cylinder transmission, sieve box transmission, auger conveyor transmission, fan transmission, elevator transmission, grain unloading transmission, straw discharging transmission, shredding transmission, etc. There are many transmission branches and the transmission structure is complex. The transmission of key parts often shows failure phenomena such as slipping, burning out, and breaking, resulting in the combine harvester being unable to work and seriously affecting the benefits of customers.

[0005] In the related art, the engine of the combine harvester transmits power to the cleaning transmission half shaft, and the cleaning rotation half shaft transmits power to the fan, seed elevator and sieve box, etc. The transmission of the cleaning transmission half shaft is complex and has a large load, which is prone to associated failures such as shaft breakage, belt damage, and chain breakage. Content of the Utility Model

[0006] The purpose of the utility model is to provide a transmission structure of a combine harvester and a combine harvester, so as to solve to a certain extent the technical problems in the prior art that the transmission of the cleaning transmission half shaft is complex and has a large load, and is prone to associated failures such as shaft breakage, belt damage, and chain breakage.

[0007] The utility model provides a transmission structure of a combine harvester, including: an engine power output shaft for transmitting the power of the engine to the downstream; a main intermediate shaft, the engine power output shaft is in transmission connection with the main intermediate shaft; a cleaning transmission shaft, the main intermediate shaft is in transmission connection with the cleaning transmission shaft; the cleaning transmission shaft includes a cleaning right shaft and a cleaning left shaft which are connected to each other; the cleaning right shaft is in transmission connection with the fan, the cleaning left shaft is in transmission connection with the seed elevator, and the seed elevator is in transmission connection with the impurity elevator and the sieve box respectively.

[0008] The engine power output shaft transmits the power of the engine to the main intermediate shaft, and the main intermediate shaft transmits the power to the cleaning transmission shaft, that is, to the right cleaning shaft and the left cleaning shaft; the right cleaning shaft transmits the power to the fan, and the fan works; the left cleaning shaft transmits the power to the seed elevator, and while the seed elevator is working, it can transmit the power to the waste elevator and the sieve box, and the waste elevator and the sieve box work respectively. In the transmission structure of the combine harvester of the present utility model, the right cleaning shaft and the left cleaning shaft jointly bear the load, and the cleaning transmission shaft transmits the power to the fan and the seed elevator, which can reduce the load of the cleaning transmission shaft, make the transmission structure of the cleaning transmission shaft simple, and can reduce the risk of associated failures such as shaft fracture, belt damage, and chain fracture.

[0009] Further, the right cleaning shaft and the left cleaning shaft are integrally formed, and in the width direction of the fuselage of the combine harvester, the cleaning transmission shaft extends from one side of the fuselage to the other side of the fuselage.

[0010] Further, the left side of the main intermediate shaft is in transmission connection with the overbridge transmission shaft, and the overbridge transmission shaft is respectively in transmission connection with the left side of the cutting table and the right side of the cutting table; the right side of the main intermediate shaft is respectively in transmission connection with the straw discharging wheel, the pushing auger and the cleaning transmission shaft; the straw discharging wheel is respectively in transmission connection with the drum and the chopper.

[0011] Further, the engine power output shaft is also in transmission connection with the unloading intermediate shaft, the unloading intermediate shaft is in transmission connection with the unloading cylinder transmission box, the unloading cylinder transmission box is in transmission connection with the left side of the front bottom auger of the grain tank, the left side of the front bottom auger of the grain tank is in transmission connection with the right side of the front bottom auger of the grain tank, and the right side of the front bottom auger of the grain tank is in transmission connection with the rear bottom auger of the grain tank.

[0012] Further, the engine power output shaft is in transmission connection with the main intermediate shaft through the main clutch belt transmission assembly, the left side of the intermediate shaft is in transmission connection with the overbridge transmission shaft through the overbridge clutch belt transmission assembly, and the overbridge transmission shaft is in transmission connection with the cutting table through the cutting table belt transmission assembly; the engine power output shaft is in transmission connection with the unloading intermediate shaft through the unloading clutch belt transmission assembly.

[0013] Further, the right side of the intermediate shaft is drivingly connected to the grass discharging wheel shaft of the grass discharging wheel through a grass discharging belt transmission assembly, the grass discharging wheel shaft is drivingly connected to the drum shaft of the drum through a drum speed change belt transmission assembly, and the grass discharging wheel shaft is drivingly connected to the chopping shaft of the chopper through a chopping belt transmission assembly; the right side of the intermediate shaft is drivingly connected to the auger shaft of the pusher auger through a pusher auger belt transmission assembly; the right side of the intermediate shaft is drivingly connected to the cleaning transmission shaft through a cleaning belt transmission assembly, the right cleaning shaft is drivingly connected to the blower through a blower speed change belt transmission assembly, the left cleaning shaft is drivingly connected to the seed elevator shaft of the seed elevator through a seed material lifting belt transmission assembly, the seed elevator shaft is drivingly connected to the residue elevator through a residue chain transmission assembly, and the seed elevator shaft is drivingly connected to the sieve box through a sieve box belt transmission assembly.

[0014] The present utility model provides a combine harvester, including the above combine harvester transmission structure.

[0015] Further, the combine harvester further includes a belt tensioning structure; the belt tensioning structure includes a fixed tensioning wheel, a movable tensioning wheel and a tensioning adjustment member; the number of the fixed tensioning wheels is multiple, including a first fixed tensioning wheel and a second fixed tensioning wheel, the first fixed tensioning wheel is used to abut against the outer wall of the belt, the second fixed tensioning wheel is used to abut against the inner wall of the belt, and the movable tensioning wheel is used to abut against the outer wall of the belt; one of the first fixed tensioning wheel and the movable tensioning wheel is used to be arranged close to the driven pulley; the tensioning adjustment member is connected to the movable tensioning wheel to drive the movable tensioning wheel to move.

[0016] Further, the first fixed tensioning wheel, the second fixed tensioning wheel and the movable tensioning wheel are used to be located on the same side of the belt; the other one of the first fixed tensioning wheel and the movable tensioning wheel is used to be arranged close to the driving pulley; the first fixed tensioning wheel and the movable tensioning wheel are arranged closer to the other side of the belt than the second fixed tensioning wheel.

[0017] Further, the combine harvester includes a single-row grass discharging wheel, and the grass discharging wheel is drivingly connected to the chopper through a first-stage chopping belt transmission assembly.

[0018] It should be understood that the foregoing general description and the following detailed description are both for the purpose of illustration and example and are not necessarily restrictive of the present disclosure. The accompanying drawings incorporated in and constituting a part of the specification illustrate the subject matter of the present disclosure. At the same time, the specification and the drawings are used to explain the principles of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 A perspective view of the first perspective of the combine harvester according to an embodiment of the present invention;

[0021] Figure 2 is Figure 1 A perspective view of the second perspective of the combine harvester shown;

[0022] Figure 3 is Figure 1 A schematic structural view of the middle belt tensioning structure of the combine harvester shown.

[0023] Icon: 1 - Engine power output shaft; 2 - Main intermediate shaft; 3 - Cleaning transmission shaft; 4 - Feeding bridge transmission shaft; 5 - Grain unloading intermediate shaft; 6 - Header shaft; 7 - Straw discharge wheel shaft; 8 - Cylinder shaft; 9 - Chopping shaft; 10 - Pushing auger shaft; 20 - Fan shaft; 30 - Seed elevator shaft; 40 - Residue elevator shaft; 50 - Sieve box shaft; 60 - Main clutch belt drive assembly; 70 - Feeding bridge clutch belt drive assembly; 80 - Header belt drive assembly; 90 - Grain unloading clutch belt drive assembly; 100 - Straw discharge belt drive assembly; 110 - Cylinder speed change belt drive assembly; 120 - Chopping belt drive assembly; 130 - Pushing auger belt drive assembly; 140 - Cleaning belt drive assembly; 150 - Fan speed change belt drive assembly; 160 - Seed elevator belt drive assembly; 170 - Residue chain drive assembly; 180 - Sieve box belt drive assembly; 190 - Belt tensioning structure; 191 - First fixed tensioning pulley; 192 - Second fixed tensioning pulley; 193 - Movable tensioning pulley; 194 - Tensioning adjustment member; 1941 - Driving member; 1942 - Support plate; 19411 - Cable; 19412 - Spring; 19413 - Rod; 195 - Belt pressing pulley; 196 - Belt; 197 - Driving belt pulley; 198 - Driven belt pulley. Specific Embodiments

[0024] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments.

[0025] The components of the embodiments of the present utility model that are generally described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model.

[0026] All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0029] In addition, terms such as "horizontal", "vertical", "hanging" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] It should be noted that for the structural devices of the combine harvester in the embodiments of the present utility model that can realize functions such as harvesting, threshing, separating stalks, removing impurities, and chopping and spreading straw, conventional ones can be adopted. The present utility model mainly protects the transmission structure of the combine harvester.

[0031] Such as Figure 1 and Figure 2As shown in the figure, the utility model provides a transmission structure of a combine harvester, which includes an engine power output shaft 1 for transmitting the power of the engine to the downstream (other components that require power); a main intermediate shaft 2, and the engine power output shaft 1 is in transmission connection with the main intermediate shaft 2; a cleaning transmission shaft 3, and the main intermediate shaft 2 is in transmission connection with the cleaning transmission shaft 3; the cleaning transmission shaft 3 includes a cleaning right shaft and a cleaning left shaft which are connected to each other; the cleaning right shaft is in transmission connection with a fan, and the cleaning left shaft is in transmission connection with a seed elevator, and the seed elevator is respectively in transmission connection with a residue elevator and a sieve box.

[0032] In this embodiment, the engine power output shaft 1 transmits the power of the engine to the main intermediate shaft 2, and the main intermediate shaft 2 transmits the power to the cleaning transmission shaft 3, that is, to the cleaning right shaft and the cleaning left shaft; the cleaning right shaft transmits the power to the fan, and the fan works; the cleaning left shaft transmits the power to the seed elevator, and while the seed elevator is working, it can transmit the power to the residue elevator and the sieve box, and the residue elevator and the sieve box work respectively. In the transmission structure of the combine harvester in this embodiment, the cleaning right shaft and the cleaning left shaft jointly bear the load. The cleaning transmission shaft 3 transmits the power to the fan and the seed elevator, which can reduce the load of the cleaning transmission shaft 3, making the transmission structure of the cleaning transmission shaft 3 simple and reducing the risk of associated failures such as shaft fracture, belt damage, and chain fracture.

[0033] Wherein, the cleaning right shaft and the cleaning left shaft can be connected and fixed through a connecting piece.

[0034] As an alternative solution, the cleaning right shaft and the cleaning left shaft are integrally formed. In the width direction of the fuselage of the combine harvester, the cleaning transmission shaft 3 extends from one side of the fuselage to the other side of the fuselage, that is, the cleaning transmission shaft 3 is coaxial in this embodiment, with high strength, which can improve the transmission efficiency and further reduce the probability of failure.

[0035] Such as Figure 1 and Figure 2 As shown in the figure, on the basis of the above embodiment, further, the left side of the main intermediate shaft 2 is in transmission connection with a cross-over transmission shaft 4, and the cross-over transmission shaft 4 is respectively in transmission connection with the left side of the cutting table and the right side of the cutting table; the right side of the main intermediate shaft 2 is respectively in transmission connection with a straw discharging wheel, a pushing auger and the cleaning transmission shaft 3; the straw discharging wheel is respectively in transmission connection with a cylinder and a chopper.

[0036] In this embodiment, the power is transmitted from the left side of the main intermediate shaft 2 to the cross-over transmission shaft 4. The cross-over transmission shaft 4 enables the cross-over operation and at the same time transmits the power to the left and right sides of the dividing table. The right side of the main intermediate shaft 2 transmits the power to the straw discharging wheel to make the straw discharging wheel work. The straw discharging wheel can simultaneously transmit the power to the drum to make the drum work, and the straw discharging wheel can simultaneously transmit the power to the chopper to make the chopper work. Specifically, the right side of the main intermediate shaft 2 conveys the power to the right side of the straw discharging wheel, the right side of the straw discharging wheel conveys the power to the left side of the straw discharging wheel, and the left side of the straw discharging wheel conveys the power to the drum and the chopper.

[0037] As Figure 1 and Figure 2 shown, on the basis of the above embodiment, further, the engine power output shaft 1 is also drivingly connected to the unloading intermediate shaft 5. The unloading intermediate shaft 5 is drivingly connected to the unloading cylinder transmission box. The unloading cylinder transmission box is drivingly connected to the left side of the front bottom auger of the grain tank. The left side of the front bottom auger of the grain tank is drivingly connected to the right side of the front bottom auger of the grain tank. The right side of the front bottom auger of the grain tank is drivingly connected to the rear bottom auger of the grain tank.

[0038] In this embodiment, the engine power output shaft 1 transmits the power to the unloading intermediate shaft 5. The unloading intermediate shaft 5 transmits the power to the unloading cylinder. While the unloading cylinder is working, it can transmit the power to the left side of the front bottom auger of the grain tank. The left side of the front bottom auger of the grain tank transmits the power to the right side of the front bottom auger of the grain tank. The right side of the front bottom auger of the grain tank transmits to the right side of the rear bottom auger of the grain tank, that is, transmits the power to the rear bottom auger of the grain tank.

[0039] In some alternative solutions, the transmission structure of the combine harvester provided by the utility model embodiment optimizes the transmission route, resulting in high transmission efficiency and reduced failure rate. Thus, the service life of the belt and chain can be increased, and at the same time, it is convenient for later maintenance and servicing, improving the user's benefits.

[0040] As Figure 1 and Figure 2 shown, on the basis of the above embodiment, further, the engine power output shaft 1 is drivingly connected to the main intermediate shaft 2 through the main clutch belt drive assembly 60. The left side of the intermediate shaft is drivingly connected to the cross-over transmission shaft 4 through the cross-over clutch belt drive assembly 70. The cross-over transmission shaft 4 is drivingly connected to the cutting table through the cutting table belt drive assembly 80. The engine power output shaft 1 is drivingly connected to the unloading intermediate shaft through the unloading clutch belt drive assembly 90.

[0041] In this embodiment, the main clutch belt transmission assembly 60 may include a main clutch belt, a main clutch driving wheel and a main clutch driven wheel. The main clutch driving wheel may be coaxially arranged with the engine power output shaft 1, the main clutch driven wheel may be coaxially arranged with the main intermediate shaft 2, and the main clutch belt may be connected between the main clutch driving wheel and the main clutch driven wheel. The bridge clutch belt transmission assembly 70 may include a bridge clutch belt, a bridge clutch driving wheel and a bridge clutch driven wheel. The bridge clutch driving wheel may be coaxially arranged on the left side of the main intermediate shaft 2, the bridge clutch driven wheel may be coaxially arranged with the bridge transmission shaft 4, and the bridge clutch belt may be connected between the bridge clutch driving wheel and the bridge clutch driven wheel. The cutting platform belt transmission assembly 80 may include a cutting platform belt, a cutting platform driving wheel and a cutting platform driven wheel. The cutting platform driving wheel may be coaxially arranged with the bridge transmission shaft 4, the cutting platform driven wheel may be coaxially arranged with the cutting platform shaft 6, and the two ends of the cutting platform belt may be respectively sleeved on the cutting platform driving wheel and the cutting platform driven wheel. The grain unloading clutch belt drive assembly 90 may include a grain unloading clutch belt, a grain unloading clutch driving wheel and a grain unloading clutch driven wheel. The grain unloading clutch driving wheel may be coaxially arranged with the engine power output shaft 1, and the grain unloading clutch driven wheel may be coaxially arranged with the grain unloading shaft. The grain unloading clutch belt is connected between the grain unloading clutch driving wheel and the grain unloading clutch driven wheel.

[0042] like Figure 1 and Figure 2 As shown, on the basis of the above embodiment, further, the right side of the intermediate shaft is connected to the grass discharge wheel shaft 7 of the grass discharge wheel through the grass discharge belt transmission assembly 100, the grass discharge wheel shaft 7 is connected to the roller shaft 8 of the roller through the roller speed change belt transmission assembly 110, and the grass discharge wheel shaft 7 is connected to the chopping shaft 9 of the chopper through the chopping belt transmission assembly 120. Specifically, the grass discharge belt transmission assembly 100 may include a grass discharge belt, a grass discharge driving wheel and a grass discharge driven wheel, the grass discharge driving wheel may be coaxially arranged on the right side of the main intermediate shaft, the grass discharge driven wheel is coaxially arranged with the grass discharge wheel shaft 7, and the two ends of the grass discharge belt are respectively sleeved on the grass discharge driving wheel and the grass discharge driven wheel. The roller speed-changing belt transmission assembly 110 may include a roller speed-changing belt, a roller speed-changing driving wheel and a roller speed-changing driven wheel. The roller speed-changing driving wheel may be coaxially arranged on the grass-discharging wheel shaft 7 (which may be the left side of the grass-discharging wheel shaft), the roller speed-changing driven wheel may be coaxially arranged on the roller shaft 8, and the roller speed-changing belt is connected between the roller speed-changing driving wheel and the roller speed-changing driven wheel. The chopping belt transmission assembly 120 may include a chopping belt, a chopping driving wheel and a chopping driven wheel. The chopping driving wheel may be coaxially arranged on the grass-discharging wheel shaft 7 (which may be the left side of the grass-discharging wheel shaft), the chopping driven wheel may be coaxially arranged on the chopping shaft 9, and the two ends of the chopping belt are respectively sleeved on the chopping driving wheel and the chopping driven wheel.

[0043] like Figure 1 and Figure 2As shown, on the basis of the above embodiments, further, the right side of the intermediate shaft is drivingly connected to the auger shaft 10 of the auger through the auger belt drive assembly 130. Specifically, the auger belt drive assembly 130 may include an auger belt, an auger drive pulley, and an auger driven pulley. The auger drive pulley may be coaxially disposed on the right side of the main intermediate shaft, the auger driven pulley is coaxially disposed on the auger shaft 10, and both ends of the auger belt are respectively sleeved on the auger drive pulley and the auger driven pulley.

[0044] As Figure 1 and Figure 2 As shown, on the basis of the above embodiments, further, the right side of the main intermediate shaft is drivingly connected to the cleaning transmission shaft 3 through the cleaning belt drive assembly 140, the right cleaning shaft is drivingly connected to the fan through the fan speed change belt drive assembly 150, the left cleaning shaft is drivingly connected to the seed elevator shaft 30 of the seed elevator through the seed elevator belt drive assembly 160, the seed elevator shaft 30 is drivingly connected to the residue elevator through the residue chain drive assembly 170, and the seed elevator shaft 30 is drivingly connected to the sieve box through the sieve box belt drive assembly 180.

[0045] Specifically, the cleaning belt drive assembly 140 may include a cleaning belt, a cleaning drive pulley, and a cleaning driven pulley. The cleaning drive pulley may be coaxially disposed on the right side of the main intermediate shaft, the cleaning driven pulley is coaxially disposed on the cleaning transmission shaft 3 (main body, disposed on the right cleaning shaft), and both ends of the cleaning belt are respectively sleeved on the cleaning drive pulley and the cleaning driven pulley.

[0046] The fan speed change belt drive assembly 150 may include a fan speed change belt, a fan speed change drive pulley, and a fan speed change driven pulley. The fan speed change drive pulley may be coaxially disposed on the right cleaning shaft, the fan speed change driven pulley is coaxially disposed on the fan shaft 20, and both ends of the fan belt are respectively sleeved on the fan speed change drive pulley and the fan speed change driven pulley.

[0047] The seed elevator belt drive assembly 160 includes a seed elevator belt, a seed elevator drive pulley, and a seed elevator driven pulley. The seed elevator drive pulley may be coaxially disposed on the left cleaning shaft, the seed elevator driven pulley is coaxially disposed on the seed elevator shaft, and both ends of the seed elevator belt are respectively sleeved on the seed elevator drive pulley and the seed elevator driven pulley.

[0048] The residue chain drive assembly 170 may include a residue chain, a residue drive sprocket, and a residue driven sprocket. The residue drive sprocket may be coaxially disposed on the seed elevator shaft, the residue driven sprocket may be coaxially disposed on the residue elevator shaft 40, and both ends of the residue chain are respectively sleeved on the residue drive sprocket and the residue driven sprocket.

[0049] The sieve box belt drive assembly 180 may include a sieve box belt, a sieve box driving wheel, and a sieve box driven wheel. The sieve box driving wheel may be coaxially arranged on the seed lift shaft, and the sieve box driven wheel is coaxially arranged on the sieve box shaft 50. Both ends of the sieve box belt are respectively sleeved on the sieve box driving wheel and the sieve box driven wheel.

[0050] It should be noted that the "shaft" in the embodiments of the present invention is a rotation center shaft.

[0051] The embodiments of the present invention also provide a combine harvester, including the combine harvester transmission structure of any of the above technical solutions. Therefore, it has all the beneficial technical effects of the combine harvester transmission structure, which will not be elaborated here.

[0052] As Figure 3 shown, on the basis of the above embodiments, further, the combine harvester further includes a belt tensioning structure 190; the belt tensioning structure 190 can be arranged at the belt drive assembly where the belt tension needs to be adjusted.

[0053] The belt tensioning structure includes a fixed tensioning wheel, a movable tensioning wheel 193, and a tensioning adjusting member 194; the number of fixed tensioning wheels is multiple, including a first fixed tensioning wheel 191 and a second fixed tensioning wheel 192. The first fixed tensioning wheel 191 is used to abut against the outer wall of the belt, and the second fixed tensioning wheel 192 is used to abut against the inner wall of the belt 196. The movable tensioning wheel 193 is used to abut against the outer wall of the belt 196; one of the first fixed tensioning wheel 191 and the movable tensioning wheel 193 is used to be arranged close to the driven belt wheel 198; the tensioning adjusting member 194 is connected to the movable tensioning wheel 193 to drive the movable tensioning wheel 193 to move.

[0054] It can be understood that the belt 196 in the belt drive assembly is annular. In the length direction of the belt 196, the driving belt wheel 197 (i.e., the driving wheel) and the driven belt wheel 198 (i.e., the driven wheel) are respectively located on both sides of the belt 196. In the width direction of the belt 196, the belt 196 includes a first side and a second side arranged opposite to each other. The belt portions located on the first side and the second side both form an inner wall and an outer wall.

[0055] In this embodiment, the first fixed tensioning pulley 191 among the multiple fixed tensioning pulleys can support the belt 196 on the outer side of the belt, and the second fixed tensioning pulley 192 can support the belt on the inner side of the belt; the position of the movable tensioning pulley 193 is adjusted through the tensioning adjustment member 194, so that the force with which the movable tensioning pulley 193 presses the belt 196 can be adjusted, thereby adjusting the tension of the belt 196. The cooperation of the fixed tensioning pulley and the movable tensioning pulley 193 facilitates the tensioning of the belt 196, and can effectively reduce the jumping of the belt 196 during operation, preventing belt jumping damage. In addition, one of the first fixed tensioning pulley 191 and the movable tensioning pulley 193 is arranged close to the driven pulley 198, which can press the part of the belt 196 close to the driven pulley 198 towards the inner side of the belt, thereby increasing the wrap angle of the driven pulley 198, and thus improving the transmission efficiency of the belt 196.

[0056] Among them, the number of fixed tensioning pulleys can be multiple. Multiple fixed tensioning pulleys can be arranged on the first side, or multiple fixed tensioning pulleys can be arranged on the second side, or multiple fixed tensioning pulleys can be arranged on both the first side and the second side.

[0057] As an alternative solution, as Figure 1 and Figure 2 shown, the first fixed tensioning pulley 191 and the second fixed tensioning pulley 192 are used to be located on the same side of the belt 196.

[0058] In this embodiment, the first fixed tensioning pulley 191 and the second fixed tensioning pulley 192 are located on the same side of the belt, that is, both the first fixed tensioning pulley 191 and the second fixed tensioning pulley 192 are located on the first side or the second side of the belt. In this way, two fixed tensioning pulleys can be arranged, one inside and one outside, on the same side of the belt 196, making the tensioning of the belt 196 more effective.

[0059] On the basis of the above embodiment, further, the movable tensioning pulley 193 can be arranged on a different side of the belt 196 from the first fixed tensioning pulley 191. For example: if the first fixed tensioning pulley 191 and the second fixed tensioning pulley 192 are arranged on the first side of the belt 196, then the movable tensioning pulley 193 is arranged on the second side of the belt 196; if the first fixed tensioning pulley 191 and the second fixed tensioning pulley 192 are arranged on the second side of the belt 196, then the movable tensioning pulley 193 is arranged on one side of the belt.

[0060] As an alternative solution, as Figure 1 and Figure 2As shown, the movable tension pulley 193 and the first fixed tension pulley 191 are used to be on the same side of the belt 196. For example, if the first fixed tension pulley 191 and the second fixed tension pulley 192 are arranged on the first side of the belt 196, then the movable tension pulley 193 is also arranged on the first side of the belt; if the first fixed tension pulley 191 and the second fixed tension pulley 192 are arranged on the second side of the belt, then the movable tension pulley 193 is arranged on the second side of the belt 196; the other one of the first fixed tension pulley 191 and the movable tension pulley 193 is used to be arranged close to the driving pulley 197.

[0061] In this embodiment, since the movable tension pulley 193 and the first fixed tension pulley 191 are on the same side, one of the first fixed tension pulley 191 and the movable tension pulley 193 is arranged close to the driven pulley 198, and the other one is arranged close to the driving pulley 197. Correspondingly, the wrap angle of the driving pulley 197 can be increased, and the transmission efficiency can be further improved.

[0062] Among them, the movable tension pulley 193 can be arranged closer to the driven pulley 198 than the first fixed tension pulley 191, or the first fixed tension pulley 191 can be arranged closer to the driven pulley 198 than the movable tension pulley 193.

[0063] As Figure 1 and Figure 2 shown, on the basis of the above embodiment, further, the first fixed tension pulley 191 and the movable tension pulley 193 are arranged closer to the other side of the belt than the second fixed tension pulley 192. With such an arrangement, the corresponding belt parts between the first fixed tension pulley 191 and the second fixed tension pulley 192 and between the second fixed tension pulley 192 and the movable tension pulley 193 can be tensioned, so that the entire belt 196 is tensioned more stably and effectively, and the belt vibration can be further reduced.

[0064] Among them, the movable tension pulley 193 is located between the first fixed tension pulley 191 and the second fixed tension pulley 192.

[0065] As an alternative solution, as Figure 1 and Figure 2 shown, the second fixed tension pulley 192 is located between the first fixed tension pulley 191 and the second fixed tension pulley 192.

[0066] In this embodiment, since the second fixed tension pulley 192 is located between the first fixed tension pulley 191 and the movable tension pulley 193, a triangular structure with two up (in the direction close to the inner side of the belt 196) and one down can be formed, making the tension of the belt 196 more effective and powerful, and further reducing the belt vibration.

[0067] As Figure 2As shown, on the basis of the above embodiments, further, the belt tensioning structure further includes a pressure belt wheel 195; the pressure belt wheel 195 is used to abut against the outer wall of the belt; and the pressure belt wheel 195 is located on the opposite side of the belt from the side where the first fixed tensioning wheel 191 is provided. Specifically, if the first fixed tensioning wheel 191, the second fixed tensioning wheel 192, and the movable tensioning wheel 193 are provided on the first side of the belt, then the pressure belt wheel 195 is provided on the second side of the belt; if the first fixed tensioning wheel 191, the second fixed tensioning wheel 192, and the movable tensioning wheel 193 are provided on the second side of the belt 196, then the pressure belt wheel 195 is provided on the first side of the belt.

[0068] In this embodiment, the pressure belt wheel 195 presses the belt inward, further increasing the wrap angle of the driven belt pulley 198 and the driving belt pulley 197, and further improving the transmission efficiency.

[0069] Among them, the number of the pressure belt wheels 195 can be one, two, three, four, etc., which can be set as needed.

[0070] As Figure 1 and Figure 2 shown, on the basis of the above embodiments, further, the tensioning adjustment member 194 includes a driving member 1941 and a support plate 1942; the support plate 1942 is rotatably connected to the fuselage of the combine harvester through a rotating shaft, and the driving member 1941 and the movable tensioning wheel 193 are respectively rotatably connected to both ends of the bracket (it can be understood that both ends of the support plate 1942 are located on both sides of the rotating shaft).

[0071] In this embodiment, the support plate 1942 forms a lever structure through the rotating shaft. When the driving member 1941 drives one end of the support plate 1942 to move away from the belt 196, the other end of the support plate 1942 drives the movable tensioning wheel 193 to press the belt 196 inward; when the driving member 1941 drives one end of the support plate 1942 to move closer to the belt 196, the other end of the support plate 1942 drives the movable tensioning wheel 193 to move away from the belt 196, thereby reducing the pressure on the belt and adjusting the tension of the belt. The tensioning adjustment member 194 with this structure is simple in structure and low in cost.

[0072] Among them, the adjustment member can be an electric telescopic rod, a cylinder, or an oil cylinder and other electric mechanisms fixed on the fuselage. The adjustment member can also include a cable 19411, a spring 19412 connected to the cable 19411, and a pull rod 19413 connected to the spring 19412 (which plays a buffering role). One end of the pull rod 19413 away from the spring 19412 is rotatably connected to the support plate 1942. The support plate 1942 is driven through the cable 19411, and the cable 19411 can be fixed on the fuselage, thereby fixing the current position of the movable tensioning wheel 193.

[0073] AsFigure 1 and Figure 2 As shown in Figure 2 , the combine harvester includes a single-row straw discharging wheel. The straw discharging wheel is drivingly connected to the shredder through a first-stage chopping belt drive assembly. The drive structure between the straw discharging wheel and the shredder is simple, which can effectively avoid blockage during the straw discharging process, improve the straw chopping efficiency, ensure smooth straw discharging, have little impact on the belt, and can extend the service life of the belt.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In the specification provided here, a large number of specific details are described. However, it can be understood that the embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures, and technologies have not been shown in detail so as not to obscure the understanding of this specification. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments but not other features, the combination of the features of different embodiments means that it is within the scope of the present invention and forms different embodiments.

Claims

1. A transmission structure for a combine harvester, characterized in that: include: The engine power output shaft transmits the engine power to the downstream; A main intermediate shaft, the engine power output shaft is drivingly connected to the main intermediate shaft; A cleaning transmission shaft, the main intermediate shaft is drivingly connected to the cleaning transmission shaft; the cleaning transmission shaft comprises a cleaning right shaft and a cleaning left shaft which are connected to each other; the cleaning right shaft is drivingly connected to the fan, the cleaning left shaft is drivingly connected to the seed material elevator, and the seed material elevator is drivingly connected to the debris elevator and the screen box respectively.

2. The transmission structure of the combine harvester according to claim 1, characterized in that: The right cleaning shaft and the left cleaning shaft are integrally formed, and in the width direction of the fuselage of the combine harvester, the cleaning transmission shaft extends from one side of the fuselage to the other side of the fuselage.

3. The transmission structure of the combine harvester according to claim 1, characterized in that: The left side of the main intermediate shaft is in driving connection with the bridge transmission shaft, and the bridge transmission shaft is respectively in driving connection with the left side of the cutting platform and the right side of the cutting platform; The right side of the main intermediate shaft is respectively connected to the grass discharge wheel, the pushing auger and the cleaning transmission shaft; the grass discharge wheel is respectively connected to the drum and the chopper.

4. The transmission structure of the combine harvester according to claim 3, characterized in that: The engine power output shaft is also transmission connected to the grain unloading intermediate shaft, the grain unloading intermediate shaft is transmission connected to the unloading barrel transmission box, the unloading barrel transmission box is transmission connected to the left side of the front bottom auger of the grain box, the left side of the front bottom auger of the grain box is transmission connected to the right side of the front bottom auger of the grain box, and the right side of the front bottom auger of the grain box is transmission connected to the rear bottom auger of the grain box.

5. The transmission structure of the combine harvester according to claim 4, characterized in that: The engine power output shaft is connected to the main intermediate shaft through a main clutch belt drive assembly, the left side of the intermediate shaft is connected to the bridge transmission shaft through a bridge clutch belt drive assembly, and the bridge transmission shaft is connected to the cutting platform through a cutting platform belt drive assembly; The engine power output shaft is connected to the grain unloading intermediate shaft through a grain unloading clutch belt transmission assembly.

6. The transmission structure of the combine harvester according to claim 3, characterized in that: The right side of the intermediate shaft is connected to the grass removal wheel shaft of the grass removal wheel through a grass removal belt transmission assembly, the grass removal wheel shaft is connected to the drum shaft of the drum through a drum speed change belt transmission assembly, and the grass removal wheel shaft is connected to the chopping shaft of the chopper through a chopping belt transmission assembly; The right side of the intermediate shaft is connected to the push auger shaft of the push auger through a push auger belt transmission assembly; The right side of the intermediate shaft is connected to the cleaning drive shaft through a cleaning belt drive assembly, the right side of the cleaning shaft is connected to the fan through a fan speed changing belt drive assembly, the left side of the cleaning shaft is connected to the seed material elevator shaft of the seed material elevator through a seed material lifting belt drive assembly, the seed material elevator shaft is connected to the miscellaneous elevator through a miscellaneous chain drive assembly, and the seed material elevator shaft is connected to the screen box through a screen box belt drive assembly.

7. A combine harvester, characterized in that: include: A combine harvester transmission structure as claimed in any one of claims 1 to 6.

8. The combine harvester according to claim 7, characterized in that: The combine harvester also includes a belt tensioning structure; The belt tensioning structure comprises a fixed tensioning wheel, a movable tensioning wheel and a tensioning adjusting member; There are multiple fixed tension wheels, including a first fixed tension wheel and a second fixed tension wheel, the first fixed tension wheel is used to abut against the outer wall of the belt, the second fixed tension wheel is used to abut against the inner wall of the belt, and the movable tension wheel is used to abut against the outer wall of the belt; one of the first fixed tension wheel and the movable tension wheel is used to be arranged close to the driven pulley; the tension adjusting member is connected to the movable tension wheel to drive the movable tension wheel to move.

9. The combine harvester according to claim 8, characterized in that: The first fixed tension wheel, the second fixed tension wheel and the movable tension wheel are used to be located on the same side of the belt; the other of the first fixed tension wheel and the movable tension wheel is used to be arranged close to the driving pulley; the first fixed tension wheel and the movable tension wheel are arranged closer to the other side of the belt than the second fixed tension wheel.

10. The combine harvester according to claim 7, characterized in that: The combine harvester comprises a single-row grass row wheel, and the grass row wheel is drivingly connected to the chopper via a primary chopping belt transmission assembly.

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