Chopping and impurity removing fan and harvester

Abstract

The invention relates to the technical field of agricultural equipment, in particular to a chopping and impurity removing fan and a harvester. The chopping and impurity-removing fan comprises a shell, a fan blade and a fan blade, the inlet, the inner cavity of the shell and the outlet form a residue discharge channel; the impurity discharging roller set is rotationally connected with the shell and located on the upstream of the impurity discharging channel; the chopping fan is located on the downstream of the impurity discharging channel so that the impurity discharging roller set can convey the impurities to the chopping fan. The chopping and impurity removing fan integrates impurity absorbing, chopping and impurity removing functions, so that the structure of the harvester is greatly simplified, and the production cost is reduced. The chopping and impurity removing fan is compact in structure and small in occupied space; the structure is simple, the failure rate can be reduced, and maintenance is convenient; the impurity removal roller set and the chopping fan are matched, so that the impurity removal power is sufficient, the impurity removal force is improved, impurities entering the grain tank can be reduced, and the cleanliness of the grain tank is improved.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural equipment, in particular to a chopping and debris removal fan and a harvester. Background Art

[0002] Corn harvester is an agricultural machine that can complete the tasks of picking, peeling and gathering ears (or picking, peeling and threshing, but the moisture of the kernels should be below 23%) at one time when the corn is ripe, and can also process the stalks (cutting into segments for silage or crushing and returning to the field). The common harvester's debris removal system currently includes a debris suction fan, a debris exhaust fan and a debris exhaust assembly, which adopts a multi-fan, multi-position debris exhaust method, which is complex in structure, high in cost and occupies a large space in the vehicle. Summary of the invention

[0003] The purpose of the present invention is to provide a shredding and debris removal fan and a harvester, so as to solve the technical problems existing in the prior art that the debris removal system of the harvester is complex in structure, high in cost, and occupies a large space in the whole vehicle.

[0004] The present invention provides a shredding and debris discharging fan, comprising: a shell, having an inlet and an outlet, wherein the inlet, an inner cavity of the shell and the outlet form a debris discharging channel; a debris discharging roller group, rotatably connected to the shell and located upstream of the debris discharging channel; and a shredding fan, located downstream of the debris discharging channel, so that the debris discharging roller group can transport the debris to the shredding fan.

[0005] The shell of the shredding and debris removal fan provided by the present invention is fixed on the top of the elevator, and the inlet on the shell is opposite to the elevator. The shredding fan works to form an airflow in the debris discharge channel, so that the debris lifted by the elevator to the vicinity of the inlet can be sucked into the debris channel. Under the action of the airflow, the debris reaches the debris removal roller group, and the debris removal roller group squeezes and crushes the debris (especially long straw) (especially for thicker straw). The debris removal roller group can pull the debris backwards so that the debris can accurately reach the shredding fan, and the shredding fan can shred the long straw in the debris. The debris after passing through the shredding fan is discharged from the outlet under the action of the airflow.

[0006] In the shredding impurity discharge fan provided by the present invention, the shredding fan provides the power to suck the impurities into the impurity discharge channel, so that the impurities can reach the impurity discharge roller group; on the one hand, the impurity discharge roller group provides the power to accurately transport the impurities to the shredding fan, reducing the pressure of the shredding fan to transport the impurities; on the other hand, the impurity discharge roller group can squeeze and crush the impurities, which can further reduce the pressure of the shredding fan to chop long straws. The cooperation of the impurity discharge roller group and the shredding fan realizes the integration of impurity suction, shredding and impurity discharge in a shredding impurity discharge fan. The shredding impurity discharge fan is set on the harvester, which can avoid the need to set up multiple fans, multi-position impurity discharge and shredding structures, greatly simplifying the structure of the harvester and reducing production costs. The shredding impurity discharge fan has a compact structure and occupies less space; the simple structure can reduce the failure rate and facilitate maintenance and repair; the impurity discharge roller group and the shredding fan cooperate to ensure sufficient impurity discharge power and improve the impurity discharge force, thereby reducing the impurities entering the grain box and improving the cleanliness of the grain box.

[0007] Furthermore, the debris removal roller group includes a first debris removal roller and a second debris removal roller that are arranged opposite to each other; the first debris removal roller is transmission-connected to the second debris removal roller, and the first debris removal roller is used to be driven by the elevator.

[0008] Furthermore, the shredder fan comprises a fan shaft and blades arranged on the fan shaft; the first row of miscellaneous rollers is drivingly connected to the fan shaft.

[0009] Furthermore, the shredding and debris removal fan also includes a transmission gear box, which is fixed on the casing and connected to the fan shaft to drive the fan shaft to rotate; a driving pulley is provided on the shaft end of the first debris removal roller, and the transmission gear box is connected to a driven pulley, and the driving pulley and the pulley are connected by a belt.

[0010] Furthermore, the shredding and debris removal fan also includes an adjustment plate and an adjustment structure, and the debris removal roller group is rotatably connected to the adjustment plate; the adjustment plate is movably arranged on the outer shell through the adjustment structure to be able to change the position of the adjustment plate relative to the outer shell.

[0011] Furthermore, the shredding and impurity removal fan also includes a fan driving device, and the fan driving device is drivingly connected to the shredding fan to drive the shredding fan to rotate.

[0012] Furthermore, the shell includes: a front end shell, the front end of the front end shell has the inlet, the rear end of the front end shell is open, and the debris removal roller group is connected to the front end shell; a rear end shell, the front end of the rear end shell is open, and the rear end of the rear end shell has the outlet; the rear end of the front end shell is connected to the front end of the rear end shell; the shredder fan is arranged in the rear end shell.

[0013] Furthermore, the front section of the front end shell is arranged obliquely downward in the direction away from the rear end shell; the rear section of the rear end shell is arranged obliquely downward in the direction away from the front end shell and is arranged in a volute, the chopping fan is arranged in the volute, and the rotation center axis of the chopping fan intersects with the extension direction of the debris discharge channel.

[0014] Furthermore, an observation window is provided at the top of the shell; and / or a protective plate is provided at the bottom of the shell, and the protective plates are provided on both sides of the shell in the length direction of the debris removal roller group.

[0015] The present invention provides a harvester, comprising: an elevator and the above-mentioned shredding and debris discharge fan, wherein the outer shell is connected to the top of the elevator, and the debris on the elevator can enter the debris discharge channel through the inlet.

[0016] It should be understood that both the foregoing general description and the following specific embodiments are for the purpose of example and illustration and do not necessarily limit the present disclosure. The accompanying drawings, which are incorporated into and constitute 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

[0017] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a shredding and impurity removal fan from a first perspective according to an embodiment of the present invention;

[0019] Figure 2 For Figure 1 A schematic structural diagram of the shredding and impurity removal fan from a second perspective is shown;

[0020] Figure 3 For Figure 1 A schematic structural diagram of the shredding and impurity removal fan from a third perspective is shown;

[0021] Figure 4 For Figure 1 A schematic diagram of the partial internal structure of the shredding and impurity removal fan is shown.

[0022] icon:

[0023] 1-housing; 11-inlet; 12-outlet; 13-inner cavity; 14-front end housing; 15-rear end housing; 151-volute; 16-observation window; 2-first row of miscellaneous rollers; 3-second row of miscellaneous rollers; 4-chopping fan; 41-fan shaft; 42-blades; 5-elevator sprocket; 6-removal sprocket; 7-drive chain; 8-chain tensioner; 9-first gear; 10-second gear; 20-driving pulley; 30-driven pulley; 40-gearbox; 50-belt; 60-belt tensioner; 70-reinforcement plate; 80-adjustment plate; 90-bearing; 100-protective plate. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

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

[0026] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0030] like Figures 1 to 4 As shown, an embodiment of the present invention provides a shredding impurity removal fan, comprising: a shell 1, having an inlet 11 and an outlet 12, the inlet 11, the inner cavity 13 of the shell 1 and the outlet 12 forming a debris discharge channel; a debris removal roller group, rotatably connected to the shell 1, and located upstream of the debris discharge channel; a shredding fan 4, located downstream of the debris discharge channel, so that the debris removal roller group can transport the debris to the shredding fan 4 (it should be noted that upstream and downstream are relative, in the conveying direction of the debris, the debris removal roller group is located upstream of the shredding fan 4, and the shredding fan 4 is located downstream of the debris removal roller group).

[0031] The casing 1 of the shredder and debris removal fan provided in this embodiment is fixed on the top of the elevator, and the inlet 11 on the casing 1 is opposite to the elevator. The shredder fan 4 works to form an airflow in the debris discharge channel, so that the debris lifted by the elevator to the vicinity of the inlet 11 can be sucked into the debris channel. Under the action of the airflow, the debris reaches the debris removal roller group, and the debris removal roller group squeezes and crushes the debris (especially long straw) (especially for relatively thick straw). The debris removal roller group can pull the debris backwards so that the debris can accurately reach the shredder fan 4, and the shredder fan 4 can shred the long straw in the debris. The debris after passing through the shredder fan 4 is discharged from the outlet 12 under the action of the airflow.

[0032] In the shredding and impurity discharging fan provided in this embodiment, the shredding fan 4 provides the power to suck the impurities into the impurity discharging channel, so that the impurities can reach the impurity discharging roller group; on the one hand, the impurity discharging roller group provides the power to accurately transport the impurities to the shredding fan 4, reducing the pressure of the shredding fan 4 to transport the impurities; on the other hand, the impurity discharging roller group can squeeze and crush the impurities, which can further reduce the pressure of the shredding fan 4 to chop long straws. The cooperation of the impurity discharging roller group and the shredding fan 4 realizes the integration of impurity suction, shredding and impurity discharging in a shredding and impurity discharging fan. The shredding and impurity discharging fan is set on the harvester, which can avoid the need to set up multiple fans, multi-position impurity discharging and shredding structures, greatly simplifying the structure of the harvester and reducing production costs. The shredding and impurity discharging fan has a compact structure and occupies less space; the simple structure can reduce the failure rate and facilitate maintenance and repair; the impurity discharging roller group and the shredding fan 4 cooperate to ensure sufficient impurity discharging power and improve the impurity discharging force, thereby reducing the impurities entering the grain box and improving the cleanliness of the grain box.

[0033] On the basis of the above embodiments, a power device such as an electric motor or a hydraulic motor may be provided to provide power to the debris removal roller group separately.

[0034] As an alternative, Figures 2 to 4 As shown, based on the above embodiment, the debris removal roller group includes a first row of debris rollers 2 and a second row of debris rollers 3 that are arranged opposite to each other; the first row of debris rollers 2 are transmission connected to the second row of debris rollers 3, and the first row of debris rollers 2 are used to be driven by the elevator.

[0035] In this embodiment, the elevator transmits power to the first row of miscellaneous rollers 2, and the first row of miscellaneous rollers 2 transmits power to the second row of miscellaneous rollers 3, thereby realizing the opposite rotation of the first row of miscellaneous rollers 2 and the second row of miscellaneous rollers 3. The original power system of the harvester is utilized to avoid setting up additional power, which can further simplify the structure of the harvester.

[0036] Specifically, an elevator sprocket 5 is provided on the power shaft of the elevator, and a waste removal sprocket 6 is provided at the shaft end of the first row of waste rollers 2 (the shaft end of the first row of waste rollers 2 can be located outside the housing 1); one end of the transmission chain 7 is sleeved on the elevator sprocket 5, and the other end is sleeved on the waste removal sprocket 6, so that the power of the elevator is transmitted to the first row of waste rollers 2 through the chain (the diameter of the elevator sprocket 5 can be set to be larger than the diameter of the waste removal sprocket 6). A first gear 9 is provided at the shaft end of the first row of waste rollers 2, and a second gear 10 is provided at the shaft end of the second row of waste rollers 3. The first gear 9 and the second gear 10 are meshed to achieve the opposite rotation of the first row of waste rollers 2 and the second row of waste rollers 3. Optionally, the first row of waste rollers 2 have two shaft ends, and the two shaft ends respectively pass through two opposite side walls of the housing 1 (the two side walls are in the width direction of the housing), the waste removal sprocket 6 is provided at one shaft end, and the first gear 9 is provided at the other shaft end, so that the structure of the first row of waste rollers 2 can be uniform.

[0037] Among them, a tensioning wheel seat can be provided on the housing 1, and a chain tensioning wheel is provided on the tensioning wheel seat (a small semicircular head low square neck bolt and a nut can be used to fix the chain tensioning wheel 8), and the chain tensioning wheel 8 can contact the chain, so as to adjust the tension of the chain. A strip hole can be provided on the tensioning wheel seat, and the chain tensioning wheel 8 can change its position on the housing 1 along the strip hole, so as to adjust the tension of the chain.

[0038] Of course, the debris removal roller group can also sequentially set multiple pairs of debris removal rollers downstream of the first debris removal roller 2 and the second debris removal roller 3 and upstream of the shredder fan 4. The transmission between one pair of debris removal rollers and another pair of debris removal rollers can be achieved through chain transmission or belt transmission, and the two pairs of debris removal rollers can be driven by gears.

[0039] Specifically, the chopping fan 4 includes a fan shaft 41 and blades 42 arranged on the fan shaft 41. It can be understood that the chopping fan 4 can cut long straws, and the blades 42 preferably have blades. The number of blades 42 can be set as needed, for example: three, four, five, six, seven and eight (the blades 42 in the figure are eight, which is just an embodiment and not a limitation). The blades 42 can be welded to the fan shaft 41 at intervals along the circumferential direction of the fan shaft 41. The blades 42 can use fixed blade fan blades, and optionally, the blades 42 use flinging blade fan blades, which are more conducive to breaking up the straw.

[0040] As an alternative, Figure 2 As shown, based on the above embodiment, further, the first row of miscellaneous rollers 2 is transmission-connected to the fan shaft 41, and the original power system of the harvester is used to provide power for the chopping fan 4, which can simplify the structure of the harvester.

[0041] The first row of miscellaneous rollers 2 and the fan shaft 41 can be driven by a chain.

[0042] As an alternative, Figures 1 to 4 As shown, the shredding and debris removal fan also includes a transmission gear box 40, which is fixed on the housing 1 and connected to the fan shaft 41 to drive the fan shaft 41 to rotate; a driving pulley 20 is provided on the shaft end of the first debris removal roller 2, and the transmission gear box 40 is connected to a driven pulley 30, and the driving pulley 20 and the belt pulley 50 are connected through a belt 50.

[0043] In this embodiment, the transmission gear box 40 has a gear shaft and a gear, and the driven pulley 30 is arranged on the gear shaft. The driving pulley 20 on the first row of miscellaneous rollers 2 drives the driven pulley 30 to rotate through the belt 50, and the driven pulley 30 drives the gear shaft to rotate, the gear shaft drives the gear to move, and the gear drives the fan shaft 41 to rotate. The diameter of the driving pulley 20 can be set to be larger than the diameter of the driven pulley 30. The miscellaneous sprocket 6 and the driving pulley 20 can be fixed on the shaft end of the first row of miscellaneous rollers 2 by key and keyway, shaft-to-shaft and shaft end positioning. The driving pulley 20 and the driven pulley 30 can be provided with multiple belt grooves (for example, two), and each belt groove is equipped with a belt.

[0044] A reinforcing plate 70 may be provided on the housing 1 to improve the strength of the housing 1 , and the gear box 40 may be fixed on the reinforcing plate 70 .

[0045] A belt tensioning pulley 60 may be provided on the housing 1, and the belt tensioning pulley 60 may contact the belt 50 to adjust the tension of the belt 50. The belt tensioning pulley 60 may adopt a conventional structure.

[0046] As another optional solution, the shredding exhaust fan also includes a fan driving device (for example, an electric motor or a hydraulic motor, etc.), which is connected to the shredding fan 4 to drive the shredding fan 4 to rotate, that is, to provide an independent power device for the shredding fan 4.

[0047] like Figure 2 and Figure 3 As shown, based on any of the above embodiments, further, the shredding and impurity removal fan also includes an adjustment plate 80 and an adjustment structure, and the impurity removal roller group is rotatably connected to the adjustment plate 80; the adjustment plate 80 is movably arranged on the outer shell 1 through the adjustment structure to be able to change the position of the adjustment plate 80 relative to the outer shell 1.

[0048] In this embodiment, the first trash removal roller 2 and the second trash removal roller 3 are connected to the housing 1 through the adjustment plate 80. By changing the position of the adjustment plate 80 relative to the housing 1, the position of the trash removal roller group on the housing 1 can be changed, so that the position of the trash removal roller group can be adjusted according to the specific situation of harvesting grains, thereby preventing the ear from accidentally entering the housing 1 and hitting the trash removal roller group, causing the grains on the ear to fall off, and avoiding crop losses.

[0049] Among them, the adjustment structure can be an electric telescopic rod, a cylinder or an oil cylinder, etc.

[0050] As an optional solution, a plurality of groups of fixing holes are arranged at intervals along the adjustment direction (which can be arranged as needed, and can be a vertical direction, a horizontal direction, or a direction inclined relative to the vertical direction) on the outer shell 1, and a corresponding adjustment plate 80 is provided with connecting holes. The connecting holes are connected to a corresponding group or part of the groups of fixing holes by fasteners, so as to adjust the position of the adjustment plate 80. This adjustment structure is simple in form and low in cost.

[0051] It can be understood that through holes are provided at corresponding positions of the housing 1 where the adjustment plate 80 is installed, so that the debris removal roller set can follow the adjustment plate 80 and move to a suitable position.

[0052] The first row of miscellaneous rollers 2 and the second row of miscellaneous rollers 3 may be rotatably connected to the adjustment plate 80 via bearings 90 .

[0053] like Figures 1 to 4 As shown, on the basis of the above embodiment, further, the housing 1 includes: a front end shell 14, the front end of the front end shell 14 has an inlet 11, the rear end of the front end shell 14 is open, and the debris removal roller group is connected to the front end shell 14; a rear end shell 15, the front end of the rear end shell 15 is open, and the rear end of the rear end shell 15 has an outlet 12; the rear end of the front end shell 14 is connected to the front end of the rear end shell 15; the shredder fan 4 is arranged in the rear end shell 15.

[0054] In this embodiment, the front housing 14 and the rear housing 15 can be connected by bolts, screws or buckles, and the housing 1 can be set as a split structure to facilitate the installation of structures such as the debris removal roller group and the shredder fan 4.

[0055] As an alternative, Figures 1 to 4 As shown, the front section of the front housing 14 is arranged obliquely downward in a direction away from the rear housing 15, so that it can be opposite to the debris that follows the elevator to rise, which is more conducive to the debris smoothly entering the debris discharge channel. Specifically, the front housing 14 includes a first inclined section and a first connecting section that are connected to each other (that is, there is an angle between the first inclined section and the first connecting section, for example, Figure 2 The first inclined section is arranged in front of the first connecting section (away from the rear end housing), the first inclined section has an inlet, and the first inclined section forms a miscellaneous entry section; the rear section of the rear end housing 15 is arranged obliquely downward in the direction away from the front end housing 14 and is arranged in a volute 151. Specifically, the rear end housing includes a second connecting section and a second inclined section connected to each other (that is, there is an angle between the second inclined section and the second connecting section, for example, Figure 2 The second inclined section is located behind the second connecting section, the first connecting section is connected to the second connecting section, the second inclined section is arranged in a volute, the chopping fan 4 is arranged in the volute 151, and the rotation center axis of the chopping fan 4 intersects with the extension direction of the debris discharge channel, so that it can be discharged from the rear and lower part, and can fall to the ground faster, avoiding the debris from flying, which is more conducive to returning the straw to the field. At this time, the gear box 40 can be arranged in the rear section of the rear end housing 15, and the gear box 40 can include spur gears and helical gears to achieve 90-degree reversal of power.

[0056] like Figure 2 As shown, based on the above embodiment, further, an observation window 16 is provided on the top of the housing 1 to facilitate the user to observe the situation inside the housing 1.

[0057] like Figure 2 As shown, based on the above embodiment, further, a protective plate 100 is provided at the bottom of the outer shell 1, and protective plates 100 are provided on both sides of the outer shell 1 in the length direction of the debris removal roller group. The protective plates 100 can prevent fruit ears from entering and reduce crop losses.

[0058] The embodiment of the present invention also provides a harvester, including an elevator and a shredding and debris discharging fan of any of the above technical solutions, wherein the housing 1 is connected to the top of the elevator, and the debris on the elevator can enter the debris discharging channel through the inlet 11, so the harvester has all the beneficial technical effects of the shredding and debris discharging fan, which will not be repeated here. In addition, the shredding and debris discharging fan has a compact structure and occupies little space. It is arranged on the top of the elevator and does not require other debris discharging devices to be used in conjunction, which can increase the space utilization rate of the harvester; the harvester can achieve a good debris discharging effect through a single rear shredding and debris discharging fan, which can effectively reduce costs and energy consumption and avoid space waste.

[0059] 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 them; although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; 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 description provided herein, 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 examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description. 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 features of different embodiments means being within the scope of the present invention and forming different embodiments.

Claims

1. A shredding and impurity removal fan, characterized in that: include: A housing having an inlet and an outlet, wherein the inlet, an inner cavity of the housing and the outlet form a debris discharge passage; A debris discharge roller group is rotatably connected to the housing and is located upstream of the debris discharge channel; The chopping fan is located downstream of the debris discharge channel, so that the debris discharge roller group can transport the debris to the chopping fan.

2. The shredding impurity removal fan according to claim 1, characterized in that: The impurity removal roller group comprises a first impurity removal roller and a second impurity removal roller which are arranged opposite to each other; The first row of miscellaneous rollers are drivingly connected to the second row of miscellaneous rollers, and the first row of miscellaneous rollers are used to be driven by the elevator.

3. The shredding impurity removal fan according to claim 2, characterized in that: The chopping fan comprises a fan shaft and blades arranged on the fan shaft; The first row of miscellaneous rollers is drivingly connected to the fan shaft.

4. The shredding and impurity removal fan according to claim 3, characterized in that: The shredding and impurity removal fan further comprises a transmission gear box, which is fixed to the housing and connected to the fan shaft to drive the fan shaft to rotate; A driving pulley is provided on the shaft end of the first row of miscellaneous rollers, a driven pulley is connected to the transmission gear box, and the driving pulley and the pulley are connected by a belt.

5. The shredding impurity removal fan according to any one of claims 2 to 4, characterized in that: The shredding impurity removal fan also includes an adjustment plate and an adjustment structure, and the impurity removal roller group is rotatably connected to the adjustment plate; The adjustment plate is movably arranged on the housing through the adjustment structure so as to be able to change the position of the adjustment plate relative to the housing.

6. The shredding and impurity removal fan according to claim 1, characterized in that: The chopping and impurity removal fan also includes a fan driving device, which is drivingly connected to the chopping fan to drive the chopping fan to rotate.

7. The shredding and impurity removal fan according to claim 1, characterized in that: The housing comprises: A front end shell, wherein the front end of the front end shell has the inlet, the rear end of the front end shell is open, and the debris removal roller group is connected to the front end shell; A rear end shell is provided with a front end opening, and the rear end of the rear end shell has the outlet; the rear end of the front end shell is butted with the front end of the rear end shell; and the chopping fan is arranged in the rear end shell.

8. The shredding and impurity removal fan according to claim 7, characterized in that: The front section of the front end shell is arranged obliquely downward in a direction away from the rear end shell; the rear section of the rear end shell is arranged obliquely downward in a direction away from the front end shell and is arranged in a volute, the chopping fan is arranged in the volute, and the rotation center axis of the chopping fan intersects with the extension direction of the debris discharge channel.

9. The shredding and impurity removal fan according to claim 1, characterized in that: The top of the shell is provided with an observation window; And / or, a protective plate is provided at the bottom of the shell, and the protective plates are provided on both sides of the shell in the length direction of the debris removal roller group.

10. A harvester, characterized in that: include: An elevator and a shredding and debris discharge fan as described in any one of claims 1 to 9, wherein the outer shell is connected to the top of the elevator, and debris on the elevator can enter the debris discharge channel through the inlet.

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