Suction fan for corn harvester

Abstract

The utility model relates to a suction fan for a corn harvester, which belongs to the technical field of agricultural equipment and comprises a first shell, a second shell, a flail knife component and fan blades. The first shell and the second shell are communicated with each other, the flail knife assembly is connected into the first shell, the fan blades are connected into the second shell, the transmission shaft is connected into the first shell and the second shell in a penetrating mode, and the flail knife assembly and the fan blades are both connected to the transmission shaft. According to the suction fan, the flail knife assembly is arranged, corn straw at the inlet of the fan can be effectively cut off, preliminary impurity separation is carried out, the working intensity of rear fan blades is reduced, blocking is avoided, the harvesting efficiency is improved, and the overall working performance and using benefits of the corn harvester are remarkably improved through the suction fan.

Description

Technical Field

[0001] The utility model relates to a suction fan, in particular to a suction fan for a corn harvester, and belongs to the technical field of agricultural equipment. Background Art

[0002] Corn harvester is an indispensable mechanical equipment in modern agricultural production. The main function of the vacuum fan for corn harvester is to optimize the processing of straw and debris during the harvesting process, improve the peeling efficiency and the working efficiency of the machine. Chinese utility model patent CN208446067U discloses a fan shredding device for corn stalks and harvesting platforms, which includes a fan housing, a fan, and a corn stalk input port. The device is characterized in that a moving knife is installed on at least one blade of the fan, and the moving knife is consistent with the distribution direction of the blade and is opposite to the position of the blade; a fixed knife fixing plate is installed in the direction of the blade at the corn stalk input port, and a fixed knife is installed on the fixed knife fixing plate. When the moving knife moves to the fixed knife position driven by the fan blade, it cooperates with the fixed knife to fully shred the corn stalk. However, the device also has shortcomings. When the corn is dense, the feeding amount of the harvester is large, the processing capacity of the fan will also increase, the air outlet is easily blocked, and frequent manual cleaning is required, which affects the work efficiency and does not meet the use requirements. Utility Model Content

[0003] Technical purpose: In order to overcome the deficiencies in the prior art, the utility model provides a vacuum blower for a corn harvester, which can effectively cut off corn stalks and perform preliminary impurity separation by introducing a blade-flipping assembly, thereby greatly improving the efficiency of agricultural production and meeting usage requirements.

[0004] Technical solution: To achieve the above-mentioned purpose, the utility model discloses a vacuum blower for a corn harvester, comprising a first shell, a second shell, a blade-flinging assembly and fan blades; the first shell and the second shell are connected to each other, the blade-flinging assembly is connected to the first shell, the fan blades are connected to the second shell, a transmission shaft passes through and is connected to the first shell and the second shell, and the blade-flinging assembly and the fan blades are both connected to the transmission shaft.

[0005] Furthermore, the plurality of fan blades are distributed in a circumferential array along the transmission shaft, and the surface of the fan blades is connected to a first plate, a second plate and a third plate, the first plate is vertically distributed to the transmission shaft, the second plate is horizontally distributed to the transmission shaft, the third plate is vertically connected to the surface of the fan blades, and the first plate and the second plate are inclined.

[0006] Furthermore, the blade-flipping assembly includes a blade-flipping fixing plate and a blade-flipping body; a plurality of blade-flipping fixing plates are connected to the transmission shaft at intervals, and the blade-flipping body is connected between two blade-flipping fixing plates.

[0007] Furthermore, the flail blade body is composed of two blades, and the outer edges of the two blades are inclined to form an eight-shaped structure.

[0008] Furthermore, the two blade-flaying assemblies are vertically distributed.

[0009] Furthermore, the first shell is provided with an air volume adjustment plate at the fan inlet.

[0010] Furthermore, through holes are arranged at intervals on the surface of the third plate.

[0011] Furthermore, the transmission shaft is connected to the bridge sprocket at the end of the bridge shaft through a transmission chain, and a chain box is provided on the surface of the transmission chain.

[0012] The utility model can effectively cut off the corn stalks at the inlet of the fan and perform preliminary impurity separation by providing a flinging knife assembly, which not only reduces the working intensity of the rear fan blades and avoids blockage, but also improves the harvesting efficiency. The use of the flinging knife assembly can also reduce the safety risks that operators may face due to handling blockages to a certain extent, improves the safety performance of the operation, and the suction fan significantly improves the overall operating performance and use efficiency of the corn harvester. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model (I);

[0014] Figure 2 This is a schematic diagram of the overall structure of the utility model (II);

[0015] Figure 3 It is a partial structural schematic diagram of the utility model;

[0016] Figure 4 It is a schematic structural diagram of the first shell and the second shell in the utility model.

[0017] In the figure, 1, the first shell; 2, the second shell; 3, the blade assembly; 301, the blade fixing plate; 302, the blade body; 4, the fan blade; 5, the transmission shaft; 6, the first plate; 7, the second plate; 8, the third plate; 9, the air volume adjustment plate; 10, the through hole; 11, the transmission chain; 12, the bridge shaft; 13, the bridge sprocket; 14, the chain box; 15, the blade; 16, the fan driving sprocket. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1 To Attachment Figure 4 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention.

[0019] A vacuum blower for a corn harvester comprises a first housing 1, a second housing 2, a blade-flinging assembly 3 and a fan blade 4; the first housing 1 and the second housing 2 are interconnected, the blade-flinging assembly 3 is connected to the first housing 1, the fan blade 4 is connected to the second housing 2, a transmission shaft 5 is connected through the first housing 1 and the second housing 2, and the blade-flinging assembly 3 and the fan blade 4 are both connected to the transmission shaft 5. The first housing 1 is irregularly shaped from the air inlet to the inner cavity, which is first large and then small. When the corn is densely harvested, the harvesting speed is fast, and the superimposed effect of the blade-flinging assembly 3 can avoid blockage, thereby ensuring the continuity and stability of the vacuum blower.

[0020] The plurality of fan blades 4 are distributed in a circumferential array along the transmission shaft 5, and the surface of the fan blades 4 is connected with a first plate 6, a second plate 7 and a third plate 8, the first plate 6 is vertically distributed with the transmission shaft 5, the second plate 7 is horizontally distributed with the transmission shaft 5, and the third plate 8 is vertically connected to the surface of the fan blades 4, and the first plate 6 and the second plate 7 are inclined, which can optimize the angle of contact with the straw.

[0021] The blade-flipping assembly 3 includes a blade-flipping fixing plate 301 and a blade-flipping body 302 ; a plurality of blade-flipping fixing plates 301 are connected to the transmission shaft 5 at intervals, and the blade-flipping body 302 is connected between two blade-flipping fixing plates 301 , and the two blade-flipping bodies 302 are disposed at both ends of the blade-flipping fixing plates 301 .

[0022] The flail blade body 302 is composed of two blades 15, the outer edges of the two blades 15 are inclined and have an eight-shaped structure, which makes the cutting process smoother, thereby improving the cutting efficiency of corn stalks and leaves.

[0023] The two blade assemblies 3 are vertically distributed, and providing multiple sets of blade assemblies 3 can improve cutting efficiency.

[0024] The first shell 1 is provided with an air volume adjustment plate 9 at the fan inlet. By adjusting the opening and closing degree of the air volume adjustment plate 9, the air flow entering the fan can be increased or decreased, thereby achieving precise control of the fan output air volume.

[0025] The surface of the third plate 8 is provided with through holes 10 at intervals.

[0026] The transmission shaft 5 is connected to the bridge sprocket 13 at the end of the bridge shaft 12 through a transmission chain 11. A chain box 14 is provided on the surface of the transmission chain 11. A fan driving sprocket 16 is connected to the bridge shaft 12 for connecting the fan to the power input chain.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A vacuum fan for a corn harvester, characterized in that: The invention comprises a first shell (1), a second shell (2), a blade-flipping assembly (3) and a fan blade (4); the first shell (1) and the second shell (2) are connected to each other, the blade-flipping assembly (3) is connected to the first shell (1), the fan blade (4) is connected to the second shell (2), a transmission shaft (5) is connected through the first shell (1) and the second shell (2), the blade-flipping assembly (3) and the fan blade (4) are both connected to the transmission shaft (5); a first plate (6) is connected to the surface of the fan blade (4), the first plate (6) and the transmission shaft (5) are vertically distributed, the blade-flipping assembly (3) comprises a blade-flipping body (302), the blade-flipping body (302) is composed of two blades (15), and the outer edges of the two blades (15) are inclined.

2. The vacuum blower for corn harvester according to claim 1, characterized in that: The plurality of blades (4) are distributed in a circumferential array along the transmission shaft (5); the surface of the blades (4) is also connected to a second plate (7) and a third plate (8); the second plate (7) is horizontally distributed with the transmission shaft (5); the third plate (8) is vertically connected to the surface of the blades (4); and the first plate (6) and the second plate (7) are arranged at an incline.

3. The vacuum blower for corn harvester according to claim 1, characterized in that: The blade-flipping assembly (3) further comprises a blade-flipping fixing plate (301); a plurality of blade-flipping fixing plates (301) are connected to the transmission shaft (5) at intervals, and the blade-flipping body (302) is connected between two blade-flipping fixing plates (301).

4. The vacuum blower for corn harvester according to claim 3, characterized in that: The two blades (15) are in an eight-shaped structure.

5. The vacuum blower for corn harvester according to claim 3, characterized in that: The two fling knife assemblies (3) are distributed vertically.

6. The vacuum blower for corn harvester according to claim 1, characterized in that: The first housing (1) is provided with an air volume adjustment plate (9) at the fan inlet.

7. The vacuum blower for corn harvester according to claim 2, characterized in that: Through holes (10) are arranged at intervals on the surface of the third plate (8).

8. The vacuum blower for corn harvester according to claim 1, characterized in that: The transmission shaft (5) is connected to a bridge sprocket (13) at the end of the bridge shaft (12) through a transmission chain (11), and a chain box (14) is provided on the surface of the transmission chain (11).

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