Ear lifting and impurity removing device and harvester

Abstract

The utility model provides a cluster lifting and impurity removing device and a harvester, which comprises a lifting and conveying device body for conveying cluster straws cut by a header, a first fan, a second fan, a separating component and a third fan, the first fan is arranged on the upper surface of the lifting and conveying device body and communicated with the lifting and conveying device body, and the second fan is arranged on the lower surface of the lifting and conveying device body. The second fan is arranged on the other side, opposite to the first fan, of the elevator body and located on the lower surface of the elevator body, the separation assembly is arranged above the first fan and the second fan, the third fan is arranged at the top of the elevator body and can be turned over downwards, the first fan sucks air to conduct first-time ear lifting and impurity discharging, and the second fan sucks air to conduct second-time ear lifting and impurity discharging. The second fan blows air to the top of the elevator body in the conveying direction of the clusters, the separation assembly further separates the straw, and the third fan sucks air to conduct second-time cluster lifting and impurity discharging. According to the ear lifting and impurity removing device and the harvester, the impurity removing efficiency and quality are improved through cooperation of the multiple draught fans, the third draught fan can be folded, and transition operation of the harvester is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery manufacturing, and in particular to a fruit ear lifting and debris removal device and a harvester. Background Technology

[0002] Combine harvesters typically divide ear harvesting into two stages: ear collection and ear recycling. During ear collection, multiple impurity removal processes are required to ensure ear cleanliness. The airflow and direction of the impurity removal fans affect ear cleanliness. From straw cutting to ear collection, multiple fans are often used to clean the ears. Therefore, in the ear collection stage, fans with different functions are needed to remove impurities based on their content. In existing ear impurity removal methods, the height of the combine harvester is limited by road vehicle height restrictions. Therefore, if multiple fans are installed on the elevator for impurity removal, the required airflow for coordinated operation of each fan is high, making fan airflow difficult to control and resulting in poor impurity removal. Furthermore, installing more than two fans results in an excessively tall combine harvester, hindering relocation and impacting harvesting efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a harvester and a device for lifting and removing impurities from ears of fruit, thereby solving the technical problem that the unreasonable layout of the impurity removal fan in the harvester affects the impurity removal effect in the prior art.

[0004] To solve the above technical problems, this utility model provides a fruit ear lifting and impurity removal device, including a lifting body for conveying fruit ear stalks cut by a header, a first fan, a second fan, a separation component, and a third fan. The first fan is disposed on the upper surface of the lifting body and communicates with the lifting body, and includes a first fan shaft arranged parallel to the width direction of the lifting body. The second fan is disposed on the opposite side of the first fan on the lifting body, located on the lower surface of the lifting body, and includes a second fan shaft arranged parallel to the first fan shaft. The separation component is located above the first and second fans and is used to separate the ears of fruit from the straw. The third fan is located at the top of the elevator body and can be folded downwards at the top of the elevator body. The third fan includes a third fan shaft that is perpendicular to the shafts of the first and second fans. The first fan draws air to perform the first ear lifting and impurity removal, the second fan blows air towards the top of the elevator body along the transport direction of the ears of fruit, the third fan draws air, the separation component further separates the straw, and the third fan performs the second ear lifting and impurity removal.

[0005] By adjusting the position of the third fan shaft in the lifting and impurity removal device, the processing distance of straw in the device during the ear collection stage is increased, thereby improving processing efficiency and reducing the impurity content of the ears. The third fan is foldable on the lifting and impurity removal device, which facilitates relocation and improves safety and reliability.

[0006] Preferably, the third fan includes a third fan housing, a third fan impeller assembly, and a third fan transmission assembly. The third fan housing is connected to and communicates with the elevator body. The third fan impeller assembly is arranged inside the third fan housing along the rotation direction of the third fan shaft. The third fan transmission assembly is drively connected to the third fan shaft, driving the third fan impeller assembly to rotate.

[0007] Preferably, the third fan housing includes a third fan exhaust port, a third fan air supply channel, and an impeller housing; the third fan air supply channel is connected to the top of the elevator body; the impeller housing includes an impeller housing sidewall, an impeller housing top cover, and an impeller housing bottom, the impeller housing bottom being connected to the third fan air supply channel, and the third fan impeller assembly being disposed inside the impeller housing; the third fan exhaust port is connected to the impeller housing sidewall and communicates with the impeller housing.

[0008] Preferably, the third fan impeller assembly includes an anti-entanglement baffle and a third fan blade, the third fan blade being arranged circumferentially along the anti-entanglement baffle; the anti-entanglement baffle is disposed below the upper cover of the impeller housing.

[0009] Preferably, the separation component includes a stem-pulling roller arranged along the width direction of the elevator body, and a second transmission wheel is arranged on the side where the third fan discharge port is located; the elevator body includes an elevator chain rake shaft, and a first transmission wheel is arranged on the side where the third fan discharge port is located; the first transmission wheel is connected to the third fan transmission component.

[0010] Preferably, the third fan transmission assembly includes a third fan transmission shaft, one end of which is fitted with a first bevel gear and the other end with a fan transmission clutch; one end of the third fan shaft is fitted with a second bevel gear, and the first bevel gear meshes with the second bevel gear.

[0011] Preferably, the third fan impeller assembly includes a reinforcing frame and a bearing mounting plate, the reinforcing frame being sleeved on the third fan shaft; the bearing mounting plate being sleeved on the third fan shaft with both ends of the bearing mounting plate fixed to the inner wall of the third fan air supply channel.

[0012] Preferably, a first sprocket and a second sprocket are respectively provided on both sides of the fan drive clutch, and the number of transmission teeth on the first sprocket is greater than the number of transmission teeth on the second sprocket.

[0013] Preferably, a shredder is provided on the third fan shaft, and the shredder is fixed to the other side of the third fan shaft where the first bevel gear is located by a shredding bearing and rotates synchronously with the third fan shaft.

[0014] Preferably, a fan baffle is provided at the bottom of the impeller housing on the side near the elevator body.

[0015] Preferably, a support frame is provided on the outside of the third fan casing, and the support frame is fixed to the lower side of the impeller casing.

[0016] By changing the location of the third fan and adjusting its rotation direction on the lifting and impurity removal device, the processing distance of straw on the lifting device body is increased, thus reducing the impurity content of the ears. Simultaneously, the direction of impurity discharge can be adjusted, further improving impurity removal efficiency. The third fan, mounted on the lifting device body, can be folded during relocation, ensuring the safety and reliability of the relocation process.

[0017] This embodiment also provides a harvester, including the ear lifting and debris removal device described in any of the above embodiments.

[0018] The harvester provided by this utility model can improve the efficiency of removing debris, and because the third fan is foldable, it can improve the safety and reliability during the transfer process. Attached Figure Description

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 A schematic diagram of a lifting and removing device provided by this utility model Figure 1 .

[0021] Figure 2 A schematic diagram of a lifting and removing device provided by this utility model Figure 2 .

[0022] Figure 3 A schematic diagram of the third fan structure provided by this utility model.

[0023] Figure 4 A top view of the third fan provided by this utility model.

[0024] Figure 5 A cross-sectional schematic diagram of the third fan provided by this utility model along the AA1 direction.

[0025] Figure 6Schematic diagram of a partial structure of the third fan provided by this utility model Figure 1 .

[0026] Figure 7 Schematic diagram of a partial structure of the third fan provided by this utility model Figure 2 .

[0027] Figure 8 Schematic diagram of a partial structure of the third fan provided by this utility model Figure 3 .

[0028] Explanation of icon numbers:

[0029] 100-Earring lifting and impurity removal device; 1-Lifting device body; 11-Lifting chain rake shaft; 111-First transmission wheel; 2-First fan, 21-First fan shaft; 3-Second fan, 31-Second fan shaft; 4-Separation assembly; 41-Stalk pulling roller; 411-Second transmission wheel; 5-Third fan, 51-Third fan shaft; 511-Second bevel gear; 512-Second spline seat; 513-Fan bearing; 52-Third fan housing; 521-Third fan impurity removal port; 522-Third fan air supply channel; 5221-Ventilation port; 523-Impeller housing; 5231-Impeller housing side 5232-Impeller housing top cover; 5233-Impeller housing bottom; 5234-Fan baffle; 53-Third fan impeller assembly; 531-Anti-entanglement baffle; 532-Third fan blade; 533-Fan base; 534-Strengthening frame; 5341-Strengthening arm; 535-Bearing mounting plate; 54-Third fan transmission assembly; 541-Third fan transmission shaft; 5411-First spline seat; 5412-First bevel gear; 5413-Fan transmission clutch; 5413a-First sprocket; 5413b-Second sprocket; 542-Flat key; 55-Chopping blade; 6-Support frame. Detailed Implementation

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0032] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0036] The implementation provides a harvester that uses three types of fans to remove impurities from the ears during the ear collection stage. This harvester, by changing the original installation and arrangement of the three fans, increases the processing distance of the straw in the lifting and impurity removal device, which can effectively reduce the impurity content in the ears. At the same time, the third fan 5 set at the top of the lifting device 1 can be folded to prevent the total height of the harvester from exceeding the road height limit during the transfer process.

[0037] This invention provides a device for lifting and removing impurities from ear-like fruits during collection and transportation. See also: Figures 1 to 8The ear-lifting and impurity-removing device includes a mechanism for conveying ear stalks cut by a header. For lifting and impurity removal, a first fan 2, a second fan 3, a separation component 4, and a third fan 5 are simultaneously installed on the elevator body 1. The first fan 2 and the second fan 3 are both located on the upper section of the elevator body 1 and are connected to it. Specifically, the first fan 2 is located on the upper surface of the elevator body 1, and the second fan 3 is located on the lower surface. The first fan's impurity removal process is the first impurity removal step in the lifting and impurity removal procedure. The second fan 3 is located on the opposite side of the first fan 2 on the elevator body 1, corresponding to the position of the first fan 2. The first fan 2 is an impurity-removing suction fan, and the second fan 3 is an impurity-removing blower, blowing air upwards along the extension direction of the elevator body 1. In the ear-lifting and impurity-removing device, some stalks are too large and need to be cut; this process is achieved through the separation component 4. The separation component 4 is located inside the elevator body 1, above the first fan 2 and the second fan 3 relative to the elevator body 1. The separation component 4 includes a stalk-pulling roller 41, which pulls and cuts the straw. The third fan 5 is located at the top of the elevator body 1 and can be folded downwards at the top of the elevator body 1 to reduce the overall height of the elevator and debris removal device when the third fan 5 is installed. The first fan 2 has a first fan shaft 21 arranged along the width direction of the elevator body 1. The second fan shaft 31 of the second fan 3 is arranged parallel to the first fan shaft 21. The third fan shaft 51 is perpendicular to the arrangement direction of the first fan shaft 21 and the second fan shaft 31. Therefore, the gas flow direction of the first fan 2 and the second fan 3 is along the arrangement direction of the elevator body 1. During the rotation of the third fan 5, the rotation direction of the third fan 5 is perpendicular to the rotation direction of the first fan 2 and the second fan 3. Specifically, the first fan 2 draws air to initially remove small straws during harvesting. Larger straws are further broken up by the pulling roller 41 as they pass through the separating component 4. The second fan 3 blows air upwards along the extension direction of the elevator body 1, transporting the straw to the third fan 5. The third fan 5 then draws air to remove the remaining straw, achieving a second round of ear lifting and impurity removal on the elevator body 1. By installing multiple fans on the elevator, the impurity removal process is refined, and larger straws can also be discharged with fans rotating in different directions, resulting in clean harvested ears with a low impurity rate. Because the shafts of the first and third fans 21 and 51 are oriented differently, the first fan 2 and the third fan 5 rotate in different directions during impurity removal, leading to different discharge directions for impurities and improving removal efficiency.

[0038] See Figures 3-5 , Figures 3 to 5The structure of the third fan 5 is illustrated. The third fan 5 includes a third fan housing 52, a third fan impeller assembly 53, and a third fan transmission assembly 54. The third fan housing 52 is connected to and communicates with the elevator body 1, thereby facilitating airflow within the elevator body 1 and the third fan housing 52. The third fan impeller assembly 53 is disposed inside the third fan housing 52 and is arranged around the rotation direction of the third fan shaft 51, thus maintaining the gas flow direction consistent with the rotation direction of the third fan shaft 51. The third fan transmission assembly 54 is disposed at the top of the third fan housing 52 and is connected to the third fan shaft 51 for transmission, driving the third fan impeller assembly 53 to rotate and form a waste gas discharge airflow. The third fan housing 52 includes a third fan exhaust port 521, a third fan air supply channel 522, and an impeller housing. Specifically, one side of the third fan air supply channel 522 is connected to the top of the elevator body 1. The third fan air supply channel 522 is provided with a vent 5221. One end of the vent 5221 is connected to the impeller housing. The impeller housing includes an impeller housing side wall 5231, an impeller housing top cover 5232, and an impeller housing bottom 5233. The third fan impeller assembly 53 is disposed inside the impeller housing. The impeller housing bottom 5233 is connected to the other end of the vent 5221. The impeller housing side wall 5231 is connected to the third fan exhaust port 521. The third fan exhaust port 521 communicates with the impeller housing. During the rotation of the third fan, impurities are discharged through the third fan exhaust port 521. Specifically, the third fan's discharge port 521 is connected to the impeller housing side wall 5231. Harvest stalks and impurities are thrown out through the discharge port 521 along the rotation direction of the third fan shaft 51. In this embodiment, the third fan shaft 51 is vertically positioned, and the third fan impeller assembly 53 rotates horizontally. Therefore, the harvested stalks and impurities are discharged horizontally. This discharge method can improve the discharge rate. When combined with the second fan 3 blowing air towards the third fan 5, it prevents impurities from falling into the harvested ears, resulting in a better discharge effect for the lifting and discharge device.

[0039] In the implementation method, see Figure 3 , Figure 7 , Figure 8The third fan impeller assembly 53 is equipped with an anti-entanglement baffle 531 and third fan blades 532. The anti-entanglement baffle 531 is located below the impeller housing cover 5232 and is connected and fixed to the impeller housing cover 5232. The third fan blades 532 are arranged along the rotation direction of the third fan shaft 51 and are evenly distributed around the anti-entanglement baffle 531, and are connected to the anti-entanglement baffle 531. The third fan blades 532 are evenly fixed to the fan base 533, and the specific fixing method can be welding or nut fixing. The anti-entanglement baffle 531 is set to prevent straw and impurities from getting entangled on the third fan shaft 51 during the rotation of the third fan shaft 51, which would affect the normal discharge of impurities by the third fan 5. In a preferred embodiment, the third fan impeller assembly 53 is further provided with a reinforcing frame 534 and a bearing mounting plate 535. The reinforcing frame 534 is sleeved on the third fan shaft 51 and connects to the third fan blades 532. The reinforcing frame 534 includes reinforcing arms 5341 in number consistent with the number of third fan blades 532. Each reinforcing arm 5341 is connected to one of the third fan blades 532. During collision with straw, the third fan blades 532 have greater strength and higher reliability. The bearing mounting plate 535, the reinforcing frame 534, and the third fan blades 532 are arranged sequentially from bottom to top on the third fan shaft 51. The bearing mounting plate 535 is located between the impeller housing and the third fan air delivery channel 522. Both ends of the bearing mounting plate 535 are fixed to the side wall 5231 of the impeller housing to prevent the components on the third fan shaft 51 from falling off during the rotation of the third fan. In another preferred embodiment, a shredder 55 is also provided below the bearing mounting plate 535. The shredder 55 is sleeved on the third fan shaft 51 and rotates synchronously with the third fan shaft 51. After the separating component 4 separates the straw, a small portion of larger straw still cannot be discharged. At this time, the shredder 55 shreds and discharges this portion of straw during its rotation.

[0040] See Figure 3 , Figure 5In a specific embodiment, the separating component 4 is used to break large straws into smaller straws. The separating component 4 includes a straw-pulling roller 41 arranged along the width direction of the elevator body 1, that is, the straw-pulling roller 41 is arranged horizontally with the first fan shaft 21 and the second fan shaft 31. The straw-pulling roller 41 is arranged above the second fan shaft 31, that is, the separating component 4 is arranged above the second fan shaft 31. A second transmission wheel 411 is arranged on the side of the straw-pulling roller 41 where the third fan discharge port 521 is located. The second transmission wheel 411 rotates synchronously with the straw-pulling roller 41. The elevator body 1 is located at the elevator chain rake shaft 11. The elevator chain rake shaft 11 is located between the straw-pulling roller 41 and the second fan shaft 31. A first transmission wheel 111 is arranged on the side of the elevator chain rake shaft 11 where the third fan discharge port 521 is located. The first transmission wheel 111 is connected to the third fan transmission component 54. Specifically, the third fan transmission assembly 54 includes a third fan transmission shaft 541, which is parallel to the lifting chain rake shaft 11 and located on top of the third fan 5. A first bevel gear 5412 is fitted at one end of the third fan transmission shaft 541, and a fan transmission clutch 5413 is fitted at the other end. A second bevel gear 511 is fitted at the end of the third fan shaft 51 connected to the third fan transmission assembly 54, and the first bevel gear 5412 meshes with the second bevel gear 511. During this process, as the lifting chain rake shaft 11 rotates, i.e., when the lifting and removing debris device starts operating, the third fan 5 starts operating synchronously. The lifting chain rake shaft 11 drives the third fan transmission shaft 541 to rotate. The first bevel gear 5412, i.e., the second bevel gear 511 on the third fan shaft 51, achieves synchronous operation of the third fan 5 and the lifting and removing debris device through power reversal, ensuring the timeliness and reliability of the debris removal process. In the specific structure where the third fan drive assembly 54 drives the third fan 5 to rotate, a second spline seat 512 is provided at the end of the third fan shaft 51 connected to the third fan drive assembly 54. The second spline seat 512 meshes with the second bevel gear 511, thereby enabling synchronous rotation of the third fan drive shaft 541 and the second bevel gear 511. The third fan shaft 51 and the third fan impeller assembly 53 are fixed to the third fan shaft 51 by a fan bearing 513. The fan base 533 is sleeved on the third fan shaft 51, and the reinforcing frame 534 is sleeved on the fan base 533. To prevent the third fan impeller assembly 53 from shifting during rotation, a mounting plate bearing is provided to fix its position. In addition, an anti-winding ring is provided at the connection between the shredder 55 and the third fan 5 to prevent impurities from getting entangled during the cutting process. On the third fan drive shaft 541, the third fan drive shaft 541 is provided with a first spline seat 5411 that meshes with the first bevel gear 5412. The first bevel gear 5412 and the second bevel gear 511 are both fixed to the third fan drive shaft 541 and the third fan shaft 51 respectively by a flat key 542.

[0041] In this embodiment, the fan drive clutch 5413 is an overrunning clutch. The reason for setting up an overrunning clutch is that the third fan drive shaft 541 can only drive the third fan 5 in one direction. However, during the maintenance of the third fan 5, when the third fan shaft 51 rotates and drives the third fan drive shaft 541 to rotate, it is impossible to make other actuators in the lifting and cleaning device work synchronously. Therefore, the operational safety and reliability of the lifting and cleaning device are improved. On both sides of the fan drive clutch 5413, a first sprocket 5413a and a second sprocket 5413b are respectively provided. The first sprocket 5413a has more transmission teeth than the second sprocket 5413b. During the adjustment of the speed of the third fan 5, the transmission connection between the first sprocket 5413a, the second sprocket 5413b and the first drive wheel 111 can be adjusted. By increasing or decreasing the transmission ratio, the rotation speed of the third fan 5 can be adjusted. When using the first sprocket 5413a, the rotation speed of the third fan 5 is slower. During the rotation of the third fan 5, the shredder 55 rotates synchronously with the third fan shaft 51. The shredder 55 is fixed to the other side of the third fan shaft 51 where the first bevel gear 5412 is located through the shredder bearing, so as to realize the function of synchronous shredding during the lifting and removal of impurities.

[0042] To prevent impurities from being discharged from other places during the impeller removal process, a fan baffle 5234 is installed on one side of the impeller housing, at the bottom of the impeller housing. Simultaneously, a support frame 6 is installed on the outer side of the third fan housing 52, fixed to the lower side of the impeller housing. During harvester relocation, to prevent the overall height of the harvester from exceeding the road height limit, the third fan 5 is folded, and the support frame 6 is used to support the third fan 5 to prevent damage during harvester relocation.

[0043] The lifting and impurity removal device provided in this embodiment has three fans installed on the lifting device body 1 to reduce the impurity content of the ears. By changing the arrangement of the third fan 5 on the lifting and impurity removal device, the third fan shaft 51 is set perpendicular to the first fan shaft 21, increasing the straw processing distance and adjusting the straw impurity removal direction, thereby improving the impurity removal efficiency of the lifting and impurity removal device and reducing the impurity content of the ears. The third fan 5 installed on the lifting device body 1 can be folded during the transfer process, ensuring the safety and reliability of the transfer.

[0044] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.

Claims

1. A device for lifting and removing impurities from ear of fruit, characterized in that, include: The elevator body is used to transport the ears of fruit and straw cut by the header; The first fan is disposed on the upper surface of the elevator body and communicates with the elevator body. The first fan includes a first fan shaft arranged parallel to the width direction of the elevator body. The second fan is disposed on the opposite side of the first fan on the elevator body, located on the lower surface of the elevator body, and the second fan includes a second fan shaft arranged parallel to the shaft of the first fan. A separation component is disposed above the first fan and the second fan, and is used to further separate and cut the straw; The third fan is located on the top of the elevator body. The third fan can be folded downwards from the top of the elevator body. The third fan includes a third fan shaft that is perpendicular to the first fan shaft and the second fan shaft. The first fan draws air to lift and remove impurities from the ears of fruit for the first time. The second fan blows air towards the top of the lifter body along the transport direction of the ears of fruit. The third fan draws air, and the separation component further separates the straw. The third fan then lifts and removes impurities from the ears of fruit for the second time.

2. The ear-lifting and impurity-removing device as described in claim 1, characterized in that, The third fan includes a third fan housing, a third fan impeller assembly, and a third fan transmission assembly. The third fan housing is connected to and communicates with the elevator body. The third fan impeller assembly is arranged inside the third fan housing along the rotation direction of the third fan shaft. The third fan transmission assembly is drively connected to the third fan shaft and drives the third fan impeller assembly to rotate.

3. The ear-lifting and impurity-removing device as described in claim 2, characterized in that, The third fan housing includes a third fan exhaust port, a third fan air supply channel, and an impeller housing; the third fan air supply channel is connected to the top of the elevator body; the impeller housing includes an impeller housing sidewall, an impeller housing top cover, and an impeller housing bottom cover, the bottom cover of the impeller housing being connected to the third fan air supply channel, and the third fan impeller assembly being disposed inside the impeller housing; the third fan exhaust port is connected to the impeller housing sidewall and communicates with the impeller housing.

4. The ear-lifting and impurity-removing device as described in claim 3, characterized in that, The third fan impeller assembly includes an anti-entanglement baffle and a third fan blade, the third fan blade being arranged circumferentially along the anti-entanglement baffle; the anti-entanglement baffle is located below the upper cover of the impeller housing.

5. The ear-lifting and impurity-removing device as described in claim 1, characterized in that, The separation component includes a stem-pulling roller arranged along the width direction of the elevator body, and a second transmission wheel is arranged on the side where the third fan discharge port is located; the elevator body includes an elevator chain rake shaft, and a first transmission wheel is arranged on the side where the third fan discharge port is located; the first transmission wheel is connected to the third fan transmission component.

6. The ear-lifting and impurity-removing device as described in claim 5, characterized in that, The third fan transmission assembly includes a third fan transmission shaft, one end of which is fitted with a first bevel gear and the other end with a fan transmission clutch; one end of the third fan shaft is fitted with a second bevel gear, and the first bevel gear meshes with the second bevel gear.

7. The ear-lifting and impurity-removing device as described in claim 2, characterized in that, The third fan impeller assembly includes a reinforcing frame and a bearing mounting plate. The reinforcing frame is sleeved on the third fan shaft. The bearing mounting plate is sleeved on the third fan shaft, and both ends of the bearing mounting plate are fixed to the inner wall of the air supply channel of the third fan.

8. The ear-lifting and impurity-removing device as described in claim 6, characterized in that, The fan drive clutch is further provided with a first sprocket and a second sprocket on both sides, and the first sprocket has more drive teeth than the second sprocket.

9. The ear-lifting and impurity-removing device as described in claim 8, characterized in that, A shredder is provided on the third fan shaft. The shredder is fixed to the other side of the third fan shaft where the first bevel gear is located by a shredder bearing and rotates synchronously with the third fan shaft.

10. The ear-lifting and impurity-removing device as described in claim 4, characterized in that, A fan baffle is provided at the bottom of the impeller housing on the side near the elevator body.

11. The ear-lifting and impurity-removing device as described in claim 4, characterized in that, A support frame is provided on the outside of the third fan casing, and the support frame is fixed to the lower side of the impeller casing.

12. A harvester, characterized in that, Includes the ear-lifting and impurity-removing device as described in any one of claims 1-11.

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