Impurity removal fan and tomato harvester

Abstract

The impurity removing draught fan comprises a draught fan shell, a draught fan shaft assembly, a driving assembly and a plurality of impeller assemblies, an air inlet is formed in the bottom of the draught fan shell, and an air outlet is formed in the top of the draught fan shell; the fan shaft assembly is installed in the fan shell, extends in the direction from one end of the fan shell to the other end of the fan shell and can rotate in the axial direction of the fan shaft assembly. The multiple impeller assemblies are evenly and fixedly installed on the fan shaft assembly at intervals in the axial direction of the fan shaft assembly, and the fan shaft assembly can drive the multiple impeller assemblies to rotate. The tomato harvesting machine has the advantages of being simple in structure and reasonable in design, thoroughly cleaning sundries in the tomato harvesting process by increasing the number of fan impellers, adjusting the structural shape of a fan shell and increasing the air inlet amount and the air outlet pressure, reducing labor intensity and saving cost at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tomato harvester technical field, concretely relates to a kind of impurity removal fan and tomato harvester. BACKGROUND

[0002] At present, the impurity removal fan in agricultural machinery is special-purpose, and the function is single. The impurity removal fan of this structure cannot completely clean the sundries such as seedling stem, mulching film, drip irrigation belt and earth block existing in the tomato harvesting process. Manual sorting is needed after harvesting, which increases labor intensity and harvesting cost. At the same time, the sundries such as seedling stem, mulching film, drip irrigation belt and earth block are easy to be entangled in the structure components of tomato machine, causing mechanical structure to be stuck, wasting manpower, material resources and time cost during maintenance.

[0003] Prior art scheme: at present, the impeller of the impurity removal fan of existing mechanical product is single-row impeller, and the shape is mostly volute or involute structure. The air inlet is pressurized by the rotation of the impeller in the shell, and the pressurized air is discharged through the air outlet of the fan to achieve the purpose of removing sundries. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of impurity removal fan and tomato harvester, to solve the problems in prior art.

[0005] The technical scheme for solving the above technical problems of the utility model is as follows:

[0006] An impurity removal fan includes a fan shell, a fan shaft assembly, a driving assembly and multiple impeller assemblies. The bottom of the fan shell is provided with an air inlet, and the top of the fan shell is provided with an air outlet. The fan shaft assembly is installed in the fan shell and extends along the direction from one end to the other end of the fan shell, and can rotate around its own axis. Multiple impeller assemblies are uniformly and fixedly installed on the fan shaft assembly along the axial direction of the fan shaft assembly, and the fan shaft assembly can drive multiple impeller assemblies to rotate.

[0007] The utility model has the advantages that: in the operation process, the fan shaft assembly drives the impeller assembly to rotate to form airflow. The airflow enters the fan shell through the air inlet and is discharged through the air outlet to remove sundries from tomatoes.

[0008] The utility model has the advantages of simple structure and reasonable design. By increasing the number of fan impeller assemblies, adjusting the shape of the fan shell structure, increasing the air inlet and air outlet pressure, the sundries in the tomato harvesting process can be completely cleaned, the labor intensity is reduced, and the cost is saved.

[0009] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0010] Further, the fan shaft assembly comprises a fan shaft pipe and a hydraulic motor, the fan shaft pipe is horizontally installed in the fan shell and extends along the direction from one end to the other end of the fan shell and can rotate around its own axis, and the hydraulic motor is fixedly arranged and its driving end is fixedly connected with one end of the fan shaft pipe.

[0011] The beneficial effect of the above further scheme is that in the operation process, the fan shaft pipe is driven to rotate by the hydraulic motor, the plurality of impeller assemblies are rotated to form air flow, the air flow enters the fan shell through the air inlet and is discharged through the air outlet, so as to remove the impurities of the tomatoes.

[0012] Further, a coupling is further arranged between the hydraulic motor and one end of the fan shaft pipe.

[0013] The beneficial effect of the above further scheme is that the structure is simple and reasonable, the hydraulic motor and the fan shaft pipe are connected by the coupling, and the assembly is convenient.

[0014] Further, the plurality of impeller assemblies each comprise a plurality of impellers, and the plurality of impellers in each of the impeller assemblies are uniformly and fixedly arranged on the fan shaft pipe in the circumferential direction of the fan shaft pipe.

[0015] The beneficial effect of the above further scheme is that the structure is simple and reasonable, the plurality of impellers are distributed in the circumferential direction of the fan shaft pipe, and the plurality of impellers can rotate with the fan shaft pipe to form air flow for impurity removal.

[0016] Further, the plurality of impeller assemblies each further comprise an impeller support, and the plurality of impeller supports are uniformly and fixedly arranged on the fan shaft pipe in the circumferential direction of the fan shaft pipe; and the plurality of impellers in each of the impeller assemblies are uniformly and fixedly arranged on the corresponding impeller support in the circumferential direction of the fan shaft pipe.

[0017] The beneficial effect of the above further scheme is that the structure is simple and reasonable, the plurality of impellers are integrated by the impeller support, and the assembly is convenient.

[0018] Further, a middle dust cover and two lower dust covers each in a mesh structure are further arranged, the middle dust cover and the two lower dust covers are fixedly arranged at the air inlet, and the middle dust cover is located between the two lower dust covers.

[0019] The beneficial effect of the above further scheme is that the structure is simple and reasonable, the middle dust cover and the two lower dust covers can not only make the air flow enter the fan shell, but also effectively prevent external impurities from entering the fan shell to affect the impurity removal of the tomatoes.

[0020] Further, two ends of the fan shell are respectively provided with air inlets, and the left and right dustproof covers in meshed structure are respectively fixedly installed at the two air inlets.

[0021] The beneficial effect of the further scheme is that, during operation, air flows into the fan shell through the air inlets, and air flows into the fan shell through the two air inlets, and the two air flows converge in the middle part of the fan shell, thereby increasing the air power and ensuring the effect of removing impurities from tomatoes.

[0022] In addition, the left and right dustproof covers can not only make air flow into the fan shell, but also effectively prevent external impurities from entering the fan shell and affecting the impurity removal operation of tomatoes.

[0023] Further, the left and right fixed seats are respectively rotatably connected and positioned to the two ends of the top of the fan shell, and the left and right fixed supports for fixing the left and right fixed seats to the frame are respectively fixedly installed on the left and right fixed seats, and a plurality of groups of fixing holes are respectively and uniformly arranged on the left and right fixed supports.

[0024] The beneficial effect of the further scheme is that, during assembly, the left and right fixed supports are used to fix the left and right fixed seats and the fan shell to the frame, and the fan shell is rotatably connected and positioned to the left and right fixed seats at the two ends of the top, so as to adjust the angle of the fan.

[0025] In addition, a plurality of groups of fixing holes are respectively and uniformly arranged on the left and right fixed supports, and the fan can be assembled by using different fixing hole groups, so as to adjust the height of the fan assembly.

[0026] Further, the left and right pull rods for fixing the fan shell to the frame are respectively fixedly installed at the two ends of the fan shell, and a plurality of mounting holes are respectively and uniformly arranged on the left and right pull rods.

[0027] The beneficial effect of the further scheme is that the structure is simple and reasonable, and the left and right pull rods can further fix the fan to the frame, thereby further ensuring the stability of the fan assembly.

[0028] The utility model also relates to a tomato harvester, which comprises the impurity removal fan.

[0029] The beneficial effect of adopting the further scheme is that the tomato harvester is simple in structure, reasonable in design, the number of fan impeller groups is increased, the structure shape of the fan shell is adjusted, the air inlet amount and air outlet pressure are increased, the sundries in the tomato harvesting process are completely cleaned, the labor intensity is reduced, and the cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0031] Figure 2 It is a front view of the utility model;

[0032] Figure 3 It is a side view of the utility model;

[0033] Figure 4 It is one of the internal structure schematic view of the utility model;

[0034] Figure 5 It is two of the internal structure schematic view of the utility model;

[0035] Figure 6 It is three of the internal structure schematic view of the utility model.

[0036] In the drawings, the component list represented by each sign is as follows:

[0037] 1, fan shell; 2, air outlet; 3, fan shaft pipe; 4, hydraulic motor; 5, impeller; 6, impeller support; 7, middle dust cover; 8, lower dust cover; 9, left dust cover; 10, right dust cover; 11, sundry prevention grid; 12, left fixed seat; 13, right fixed seat; 14, left fixed support; 15, right fixed support; 16, left pull rod; 17, right pull rod; 18, mounting hole; 19, fixed hole group; 20, connecting bolt. DETAILED DESCRIPTION

[0038] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0039] In the description of the utility model, it needs to be understood that, the orientation or position relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0040] In the description of the utility model, it needs to be understood that, the orientation or position relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown based on the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0041] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] Embodiment 1

[0043] As Figures 1 to 6 shown, the embodiment provides a fan for removing impurities, which comprises a fan shell 1, a fan shaft assembly, a driving assembly and a plurality of impeller assemblies, the bottom of the fan shell 1 is provided with an air inlet, and the top of the fan shell 1 is provided with an air outlet 2; the fan shaft assembly is installed in the fan shell 1 and extends along the direction from one end to the other end of the fan shell 1, and it can rotate around its own axis; a plurality of the impeller assemblies are uniformly and fixedly installed on the fan shaft assembly along the axial direction of the fan shaft assembly, and the fan shaft assembly can drive a plurality of the impeller assemblies to rotate.

[0044] During operation, the fan shaft assembly drives the impeller assemblies to rotate to form an air flow, the air flow enters the fan shell 1 from the air inlet and is discharged from the air outlet 2 to remove impurities from the tomatoes.

[0045] Preferably, in the embodiment, the fan housing 1 has a structure with a thick lower end and a thin upper end, and the lower end of the fan housing 1 has a cylindrical structure and the upper end has an arc-shaped structure, which is reasonable in design and increases the wind power to ensure the effect of impurity removal.

[0046] Preferably, in the embodiment, the air inlet and the air outlet 2 are preferably long strip-shaped openings, which respectively extend along the direction from one end to the other end of the fan housing 1.

[0047] The embodiment has simple structure and reasonable design, and by increasing the number of fan impeller groups and adjusting the shape of the fan housing structure, the air inlet amount and the air outlet pressure are increased, so that the impurities in the tomato harvesting process are completely cleaned, the labor intensity is reduced, and the cost is saved.

[0048] Embodiment 2

[0049] On the basis of embodiment 1, in the embodiment, the fan shaft assembly includes a fan shaft pipe 3 and a hydraulic motor 4, the fan shaft pipe 3 is horizontally installed in the fan housing 1 and extends along the direction from one end to the other end of the fan housing 1, and the fan shaft pipe 3 can rotate around its own axis; the hydraulic motor 4 is fixedly arranged, and the driving end of the hydraulic motor 4 is fixedly connected with one end of the fan shaft pipe 3; a plurality of the impeller assemblies are coaxially and fixedly sleeved on the fan shaft pipe 3.

[0050] During operation, the hydraulic motor 4 drives the fan shaft pipe 3 to rotate, the fan shaft pipe 3 drives the plurality of impeller assemblies to rotate to form an air flow, the air flow enters the fan housing 1 through the air inlet, and is discharged through the air outlet 2 to perform impurity removal treatment on the tomatoes.

[0051] Embodiment 3

[0052] On the basis of embodiment 2, in the embodiment, a shaft coupling is further arranged between the hydraulic motor 4 and one end of the fan shaft pipe 3.

[0053] The scheme has simple structure and reasonable design, and the shaft coupling is used to connect the hydraulic motor 4 and the fan shaft pipe 3, so that the assembly is convenient.

[0054] It should be noted that the hydraulic motor 4 and the shaft coupling are respectively existing technologies, and the specific structure and principle thereof will not be described herein.

[0055] Embodiment 4

[0056] On the basis of any one of embodiments 2 to 3, in the embodiment, the plurality of impeller assemblies each include a plurality of impellers 5, and the plurality of impellers 5 in each of the impeller assemblies are fixedly installed on the fan shaft pipe 3 in a uniform and spaced manner along the circumferential direction of the fan shaft pipe 3.

[0057] The scheme has simple structure and reasonable design, multiple impellers 5 are circumferentially distributed on the fan shaft pipe 3, and the multiple impellers 5 can rotate with the fan shaft pipe 3 to form airflow to perform the impurity removal operation.

[0058] Embodiment 5

[0059] On the basis of the embodiment 4, in the embodiment, each of the multiple impeller assemblies further comprises an impeller support 6, and the multiple impeller supports 6 are uniformly and coaxially fixed on the fan shaft pipe 3; and the multiple impellers in each of the impeller assemblies are uniformly and fixedly installed on the corresponding impeller support 6 along the circumference of the fan shaft pipe 3.

[0060] The scheme has simple structure and reasonable design, multiple impellers 5 are circumferentially distributed on the fan shaft pipe 3, and the multiple impellers 5 can rotate with the fan shaft pipe 3 to form airflow to perform the impurity removal operation.

[0061] Embodiment 6

[0062] On the basis of the above-mentioned embodiments, the embodiment further comprises a middle dust cover 7 and two lower dust covers 8 which respectively have a mesh structure, the middle dust cover 7 and the two lower dust covers 8 are respectively fixedly installed at the air inlet, and the middle dust cover 7 is located between the two lower dust covers 8.

[0063] The scheme has simple structure and reasonable design, the middle dust cover 7 and the two lower dust covers 8 can make the airflow enter the fan housing 1 and effectively prevent external impurities from entering the fan housing 1 to affect the impurity removal operation of the tomatoes.

[0064] Embodiment 7

[0065] On the basis of the above-mentioned embodiments, in the embodiment, the fan housing 1 is provided with air inlets at two ends, and a left dust cover 9 and a right dust cover 10 which respectively have a mesh structure are fixedly installed at the two air inlets; and a dust prevention grid 11 is fixedly installed at the air outlet 2.

[0066] During the operation, on one hand, the airflow enters the fan housing 1 through the air inlets, and on the other hand, the airflow enters the fan housing 1 through the two air inlets, and the two airflows converge in the middle part of the fan housing 1 to increase the wind power and ensure the effect of the impurity removal of the tomatoes.

[0067] In addition, the left dust cover 9 and the right dust cover 10 can make the airflow enter the fan housing 1 and effectively prevent external impurities from entering the fan housing 1 to affect the impurity removal operation of the tomatoes.

[0068] Preferably, in the embodiment, the above-mentioned anti-impurity grid 11 is preferably a comb-tooth structure, which can effectively block the falling of tomatoes, seedlings, drip irrigation belts, soil blocks and the like into the fan housing 1, causing fan failure; at the same time, the fan grid teeth arranged uniformly and consistently in the same direction can play a role in guiding the wind direction, making the air volume of the air outlet uniform, avoiding the occurrence of impurity removal dead angles, and ensuring the impurity removal efficiency.

[0069] Based on the above scheme, the above-mentioned hydraulic motor 4 is fixedly installed in the right dust cover 10.

[0070] Embodiment 8

[0071] In the above-mentioned embodiments, in the embodiment, the two ends of the top of the fan housing 1 are respectively provided with a left fixed seat 12 and a right fixed seat 13, and the two ends of the top of the fan housing 1 are respectively rotatably connected and positioned with the left fixed seat 12 and the right fixed seat 13; the left fixed seat 12 and the right fixed seat 13 are respectively fixedly installed with a left fixed support 14 and a right fixed support 15 for fixing them on the vehicle frame, and a plurality of groups of fixing hole groups 19 are uniformly and separately provided on the left fixed support 14 and the right fixed support 15.

[0072] When assembling, the left fixed seat 12 and the right fixed seat 13 and the fan housing 1 are fixed on the vehicle frame by using the left fixed support 14 and the right fixed support 15, and at the same time, the fan can be rotatably connected and positioned with the left fixed seat 12 and the right fixed seat 13 at the two ends of the top, so as to adjust the angle of the fan;

[0073] In addition, a plurality of groups of fixing hole groups 19 are uniformly and separately provided on the left fixed support 14 and the right fixed support 15, and different fixing hole groups 19 can be used to assemble the fan, so as to adjust the height of the fan assembly.

[0074] Preferably, in the embodiment, the left fixed seat 12 and the right fixed seat 13 are oppositely provided with arc-shaped holes, and the two ends of the top of the fan housing 1 are oppositely fixedly installed with connecting bolts 20, and the two connecting bolts 20 respectively extend into the two arc-shaped holes and are respectively slidably connected with the two arc-shaped holes. When assembling, the fan housing 1 is manually rotated to a set angle, and then the locking nuts on the two connecting bolts 20 are tightened to tightly press the left fixed seat 12 and the right fixed seat 13 away from each other on one side, so as to fix the fan housing 1.

[0075] Preferably, in the embodiment, three groups of fixing hole groups 19 are uniformly and separately provided on the left fixed support 14 and the right fixed support 15 from top to bottom, and each group of fixing hole groups 19 includes a plurality of fixing holes, for example, three fixing holes. When assembling, different fixing hole groups 19 are used to assemble the fan housing 1 at different heights.

[0076] Embodiment 9

[0077] On the basis of embodiment 8, in this embodiment, the two ends of the fan shell 1 are also fixedly installed with a left pull rod 16 and a right pull rod 17 for fixing the fan on the frame, and a plurality of mounting holes 18 are uniformly and separately arranged on the left pull rod 16 and the right pull rod 17.

[0078] The scheme has simple structure and reasonable design, and the left pull rod 16 and the right pull rod 17 can further fix the fan on the frame, thereby further ensuring the stability of the fan assembly.

[0079] Preferably, in this embodiment, the left pull rod 16 and the right pull rod 17 are preferably long strip-shaped plate structures, and the plurality of mounting holes 18 are uniformly and separately distributed along the length direction of the corresponding pull rod.

[0080] Embodiment 10

[0081] On the basis of the above-mentioned embodiments, this embodiment further provides a tomato harvester comprising the impurity removing fan as described above.

[0082] This embodiment further provides a tomato harvester, which has simple structure and reasonable design, increases the number of fan impeller groups, adjusts the shape of the fan shell structure, increases the air inlet amount and air outlet pressure, and completely removes the impurities in the tomato harvesting process, thereby reducing the labor intensity and saving the cost.

[0083] The working principle of the utility model is as follows:

[0084] During operation, the fan shaft assembly drives the impeller assembly to rotate to form airflow, the airflow enters the fan shell 1 through the air inlet, and is discharged through the air outlet 2, so as to remove the impurities of the tomatoes.

[0085] The impurity removing fan provided by the utility model increases the number of fan impeller groups, adjusts the shape of the fan shell structure, increases the air inlet amount and air outlet pressure, and completely removes the impurities in the tomato harvesting process.

[0086] It should be noted that all the electronic components involved in the utility model are of the prior art, and the above-mentioned components are electrically connected with the controller, and the control circuit between the controller and the components is of the prior art.

[0087] It is apparent to a person skilled in the art that the present application is not restricted to the details of the foregoing exemplary embodiments, but that the present application can be implemented in other embodiments without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in a descriptive sense only and not for purposes of limitation. The present application is defined by the appended claims rather than by the foregoing description, and all changes and modifications that come within the meaning and range of equivalents of the claims are to be embraced within the scope of the present application. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0088] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic listed in the embodiments. The specification can be referred to for a description of various alternate embodiments. The various embodiments need not necessarily exhibit the same characteristics or the same combination of characteristics. Some embodiments can exhibit more characteristics than others, depending on the practical use of the embodiments, and some characteristics of some embodiments can not be necessary for the practical use of the embodiments. Moreover, it is understood that, although the specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity. A person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by a person skilled in the art.

[0089] The preferred embodiments of the present application are described above with the specific details. However, it is to be understood that the above-described embodiments are merely illustrative and not restrictive. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the present application.

Claims

1. A debris-removing fan characterized by: The utility model provides a fan, including fan shell (1), fan shaft subassembly, drive subassembly and a plurality of impeller subassembly, the bottom of fan shell (1) is equipped with air inlet, and the top of fan shell (1) is equipped with air outlet (2), fan shaft subassembly is installed in fan shell (1), it extends along the direction of one end to the other end of fan shell (1), and it can rotate around the axis of itself, a plurality of impeller subassembly is evenly spaced and fixedly installed on fan shaft subassembly along the axial direction of fan shaft subassembly, fan shaft subassembly can drive a plurality of impeller subassembly to rotate, the both ends of fan shell (1) top are equipped with left fixed seat (12) and right fixed seat (13) respectively, and the both ends of fan shell (1) top are rotatably connected with left fixed seat (12) and right fixed seat (13) respectively and are positioned, left fixed seat (12) and right fixed seat (13) are fixedly installed with left fixed support (14) and right fixed support (15) for being fixed on the frame respectively, left fixed support (14) and right fixed support (15) are evenly spaced and provided with a plurality of fixed hole groups (19) respectively, left fixed seat (12) and right fixed seat (13) are oppositely provided with arc-shaped holes, the both ends of fan shell (1) top are oppositely fixedly installed with connecting bolt (20), two connecting bolt (20) are connected with lock nut after extending out of two arc-shaped holes, and two connecting bolt (20) are slidably connected with two arc-shaped holes respectively.

2. The debris removal fan of claim 1, wherein: The fan shaft subassembly includes a fan shaft pipe (3) and a hydraulic motor (4). The fan shaft pipe (3) is horizontally installed in the fan shell (1) and extends along the direction from one end to the other end of the fan shell (1). The fan shaft pipe (3) can rotate around its own axis. The hydraulic motor (4) is fixedly arranged, and its driving end is fixedly connected with one end of the fan shaft pipe (3). A plurality of impeller subassemblies are coaxially fixedly sleeved on the fan shaft pipe (3).

3. The debris-removal fan of claim 2, wherein: A coupling is further installed between the hydraulic motor (4) and one end of the fan shaft pipe (3).

4. The debris-removal fan of claim 2, wherein: Each of the plurality of impeller subassemblies includes a plurality of impellers (5). The plurality of impellers (5) in each of the impeller subassemblies are fixedly installed on the fan shaft pipe (3) in a uniform and spaced manner along the circumferential direction of the fan shaft pipe (3).

5. The debris-removal fan of claim 4, wherein: Each of the plurality of impeller subassemblies further includes an impeller support (6). The plurality of impeller supports (6) are coaxially fixedly sleeved on the fan shaft pipe (3) in a uniform and spaced manner. The plurality of impellers in each of the impeller subassemblies are fixedly installed on the corresponding impeller support (6) in a uniform and spaced manner along the circumferential direction of the fan shaft pipe (3).

6. The debris removal fan of any one of claims 1-5, wherein: The utility model further includes a middle dust cover (7) and two lower dust covers (8) each in a mesh structure. The middle dust cover (7) and the two lower dust covers (8) are fixedly installed at the air inlet, and the middle dust cover (7) is located between the two lower dust covers (8).

7. The debris-removal fan of any one of claims 1-5, wherein: Two ends of the fan shell (1) are respectively provided with air inlets, and two air inlets are respectively fixedly provided with left and right dustproof covers (9) and (10) in a net structure.

8. The debris-removal fan of claim 1, wherein: Two ends of the fan shell (1) are respectively fixedly provided with left and right pull rods (16) and (17) for fixing the fan shell on a vehicle frame, and a plurality of mounting holes (18) are uniformly and separately arranged on the left and right pull rods (16) and (17).

9. A tomato harvester characterized in that: A fan for removing impurities, comprising any one of claims 1-8.

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