JP7213782B2 - sugar cane harvester - Google Patents

Description

The present invention relates to a sugar cane harvester.

For example, in the sugarcane harvester disclosed in Patent Document 1, a separation device (a "wind sorting device" in the document) is connected to the rear of a rear-up inclined transport device (a "transportation device" and a "chopping device" in the document). ing. The separating device is equipped with a fan (“blower” in the literature), and the rotating drive of the fan generates an upward sorting wind.

JP 2015-202085 A

By the way, when the fan is rotationally driven, air is taken in through an opening provided below the fan, and an upward sorting wind is generated, but the sorting wind does not always go straight from the opening to the fan. For example, if the connection port between the conveying device and the separating device is biased toward the side where the conveying device is located, part of the air sucked through the opening does not go straight to the fan, but rather flows toward the side where the conveying device is located. Easy to meander through space. At this time, if a whirlpool is formed in the meandering wind flow in the space on the side where the conveying device is located, part of the wind stays as the whirlpool. Since the vortex acts as a resistance to the suction of the fan, if the vortex is generated in the wind for sorting the wind, the efficiency of sorting the wind becomes poor. In addition, the driving load of the fan accounts for a large proportion of the driving load of the entire sugarcane harvester. become stable.

SUMMARY OF THE INVENTION In view of the above situation, it is an object of the present invention to provide a sugar cane harvester with improved wind sorting efficiency in the separating device.

The sugarcane harvester according to the present invention comprises a harvesting section provided in the lower front portion of the machine body for harvesting the planted crops, and a rear upward slope for conveying the crops harvested by the harvesting section upwards at the rear of the machine body. and a separating device connected to the rear portion of the conveying device for separating the crops into contaminants and crops by wind sorting. A fan that rotates to generate the wind for sorting the wind, a discharge unit that is disposed above the fan and has a discharge port at the top, and discharges the contaminants from the discharge port, and below the fan. The rear part of the conveying device is connected to the outer peripheral part, and an opening is provided in the lower part, and the harvested material thrown under the fan is dropped from the opening and the fan is dropped from the opening. and a processing unit that sucks air for the air flow, is provided at the upper end of the conveying device at a position higher than the opening, and introduces outside air from the outside of the conveying device for the fan. It is characterized by having an intake section.

The rear part of the conveying device is connected to the separating device, and part of the air sucked through the opening tends to meander to the space on the side where the conveying device is located instead of going straight to the fan. According to the present invention, the air intake point for the fan is provided not only at the opening but also at the air intake part at the top of the conveying device. inspiratory capacity increases. In addition, the wind sucked from the intake section and the wind sucked from the opening and meandering in the space on the side where the conveying device is located join in the space near the top of the conveying device. Since the air drawn in from the air intake section goes straight to the fan, the air drawn in from the air intake section should be directed to the fan against the wind that is sucked in through the opening and meandering in the space on the side where the transport device is located. It is easy to rectify, and this rectification suppresses the generation of eddy currents. This improves the efficiency of wind sorting without increasing the drive load of the fan, and even if the load on the entire sugarcane harvester fluctuates, there is enough room for the fan drive power to stabilize the sorting wind force. become In this way, a sugar cane harvester with improved wind sorting efficiency in the separation device is realized.

In addition, with this configuration, since the air intake section is provided at a position higher than the opening, the air intake section can be arranged closer to the fan than the opening. As a result, it becomes easier to rectify the meandering wind in the space on the side where the conveying device is located.

In the present invention, a cutting device that cuts the crops and puts them into the processing section is provided above the conveying device, and the intake section corresponds to the conveying path between the cutting device and the processing section. It is suitable if it is provided in the part.

With this configuration, since the intake section is provided at a portion corresponding to the conveying path between the cutting device and the processing section, the crop fed from the cutting device to the processing section is affected by the wind from the intake section, It is positively guided to the processing part by the air from the opening that is rectified by the air from the intake part. For this reason, the crops are evenly subjected to the sorting wind in the processing section.

In the present invention, it is preferable that the conveying device is provided with a case that covers the conveying route, and that the intake section is provided at the upper end of the case.

With this configuration, since the transport path is covered with the case, the risk of foreign substances other than crops entering the transport path is reduced. In addition, in this configuration, the configuration of the air intake section is simplified because the case is used both to prevent contamination by foreign matter and to provide air intake for the fan.

In the present invention, it is preferable that a top plate is provided on the upper part of the case, and that the intake section is provided on a rearwardly rising inclined portion formed at an upper end portion of the top plate.

If the air intakes are provided on the left and right sides or the upper part of the case, it is conceivable that the wind will meander to the side where the fan is located immediately after being sucked from the air intakes. In this configuration, since the air intake section is provided on the rearwardly rising inclined section, the air taken in from the air intake section tends to go straight to the fan as it is without meandering.

In the present invention, it is preferable that a plurality of wind direction plates be provided at intervals in the circumferential direction in the upper portion of the inside of the processing section.

As the fan rotates, an upward swirling flow is likely to occur at the inner peripheral edge of the processing unit, but this swirling flow does not locally act upward, and stays in the same vertical position while swirling, and contaminants are collected. may also stay together with the swirling flow. With this configuration, the swirl flow is forcibly rectified into an upward swirl flow by the wind direction plate, so that the phenomenon in which the swirl flow stays while swirling at the vertical position is less likely to occur. As a result, contaminants are positively guided to the discharge section.

In the configuration in which the airflow direction plate is provided, it is preferable that the airflow direction plate is provided at the same height as the air intake section, and that the airflow direction plate is provided on the inner wall portion of the processing section .

With this configuration, the wind deflector is provided to avoid the portion where the connection port is located, and the height of the wind deflector and the intake section is the same. Therefore, in the vicinity of the connection port, the crops are quickly guided to the processing section by the wind from the intake section and the wind from the opening that is rectified by the wind from the intake section. In the vicinity of the wind direction plate, since the swirl flow generated by the rotational driving of the fan is straightened upward, the contaminants contained in the crops are directly guided to the discharge part by the upward swirl flow. This further improves the efficiency of wind sorting in the processing section.

In the present invention, it is preferable that the discharge portion has a larger diameter than the processing portion in plan view, and a stepped portion is formed between the discharge portion and the processing portion.

It is desirable that the air and contaminants discharged from the fan are discharged from the discharge port as smoothly as possible. Therefore, it is important to reduce the pressure loss in the discharge section. With this configuration, since the diameter of the discharge part is larger than that of the treatment part, the discharge path of the discharge part is ensured to be wider than the path of the treatment part. The generation of surge pressure in is suppressed. Moreover, even if a surge pressure is generated inside the discharge portion, the surge pressure is received by the area formed by the stepped portion, and the pressure loss in the discharge path inside the stepped portion is reduced. As a result, the air and contaminants discharged from the fan are smoothly guided from the discharge path inside the stepped portion to the discharge port, further improving the driving efficiency of the fan and the efficiency of wind separation in the processing section. .

In the present invention, a connection port connected to the processing section is formed at the rear end portion of the conveying device, the processing section extends downward from the upper and lower central portions of the connection port, and the lower end of the processing section It is preferable that a first narrowed portion that is inclined toward the inner diameter side toward the lower side is formed in the portion.

In the area below the opening, the suction action of the fan is attenuated compared to the area above the opening. In addition, with the lower end of the processing section as a boundary, the upward wind suddenly becomes stronger in the space above the opening. With this configuration, the processing section extends downward from the vertical center of the connection port. The time that the crops put in from the air stay in the processing part becomes longer. As a result, the crops are exposed to the sorting wind for a longer period of time, and the wind sorting efficiency in the processing unit is further improved. In addition, since the first constricted portion is formed at the lower end of the processing section, attenuation of the wind speed at the lower end of the processing section is suppressed, compared to a configuration in which the first constricted section is not formed at the lower end of the processing section. The wind speed of wind sorting is firmly ensured.

In the present invention, the discharge port is configured to have a square cross-section, and a second throttle that is inclined downward toward the downstream side in the discharge direction is provided in a portion of the upper portion of the discharge portion where the discharge port is located. A chamfer is formed on both left and right ends of a portion of the lower portion of the discharge portion where the discharge port is located, the chamfering being inclined toward the left-right center toward the downstream side in the discharging direction and upward toward the downstream side in the discharging direction. It is preferable that a portion is formed.

According to this configuration, since the discharge port is configured to have a rectangular cross section, it is easier to process the member than the configuration in which the discharge port has a circular cross section, and is advantageous in terms of cost. be. Further, the upper end portion of the outlet and the corner portion at the lower end portion of the outlet are narrowed by the second narrowed portion and the chamfered portion. As a result, contaminants are discharged more accurately in the target direction than in a configuration in which the discharge port is not narrowed.

1 is an overall side view of a sugarcane harvester; FIG. 1 is an overall plan view of a sugarcane harvester; FIG. It is a side cross-sectional view showing the configuration of the separation device. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, showing the configuration of the separation device in plan view; It is a rear view which shows the discharge port of a separation apparatus by front view. FIG. 4 is a graph diagram for explaining the air velocity on the suction side in the separation device;

[Basic configuration of sugarcane harvester]
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a sugarcane harvester according to the present invention will be described below with reference to the drawings. 1 and 2 are diagrams showing the entire sugarcane harvester, wherein FIG. 1 is a left side view and FIG. 2 is a plan view. In this embodiment, in FIGS. 1 and 2, the direction indicated by reference numeral (F) is the front of the fuselage, and the direction indicated by reference (B) is the rear of the fuselage. Further, in FIG. 2, the direction indicated by the symbol (L) is the left side of the fuselage, and the direction indicated by the symbol (R) is the right side of the fuselage.

The sugarcane harvester has left and right front wheels that can be steered and left and right rear wheels that cannot be steered and are driven to rotate. ing. The machine body is provided with an operating section 1, a harvesting section 2, a conveying device 3 in a rearward rising inclined posture, a separating device 4, a discharge conveyor 5, and an engine 6. - 特許庁The harvesting unit 2 is provided in the front lower part of the machine body and harvests planted crops (sugar cane). The conveying device 3 conveys the crops harvested by the harvesting section 2 rearwardly and upwardly of the machine body. The separating device 4 is connected to the rear part of the conveying device 3 and separates the crops conveyed by the conveying device 3 into harvested products and contaminants by wind sorting. The discharge conveyor 5 is supported at the rear part of the machine body, receives the harvested material, conveys the harvested material obliquely upward, and discharges the harvested material, for example, onto the loading platform of a transport vehicle. In addition, the body is provided with hydraulic equipment such as a hydraulic pump and a traveling transmission device. Hydraulic equipment such as a hydraulic pump supplies the power of the engine 6 to each part of the aircraft. The traveling transmission device transmits the power of the engine 6 to the left and right rear wheels as traveling devices. A body frame that supports the entire body is provided, and each device described above is supported by the body frame.

The driving unit 1 is provided at a high position in the front part of the aircraft body, and is surrounded by a cabin 7. - 特許庁The interior of the cabin 7 is equipped with a driver's step, driver's seat, steering wheel, operation panel, and the like. Both left and right side portions of the cabin 7 are formed as openable and closable door portions. The left and right side portions are made of a transparent plate such as a transparent synthetic resin material or a glass plate, so that the driver can easily see the working conditions in the field on the front side of the machine.

The harvesting unit 2 includes left and right weed dividing devices 11, 11 that rotate about the vertical axis, left and right side wall portions 12, 12 provided so as to be connected to the rear of the left and right weed dividing devices 11, 11, and a cutting device. A device 13 is provided. The left and right weed dividing devices 11 are provided with weed dividing rotating bodies or the like that are vertically oriented in a backward falling state. The cutting rotator has a helical guide on the outer circumference of the cylindrical cylinder, and the crops to be cut are guided by the cutting rotator and caused to take a vertical posture, and the left and right side walls are oriented. Enter the area between the parts 12,12.

Although not shown, a scraping roller is provided between the side wall portion 12 and the cutting device 13 in the front-rear direction, and the scraping roller is provided in a region sandwiched between the left and right side wall portions 12, 12. ing. The crops planted in the field are pushed down by the rake rollers so as to assume a forward tilting posture. A cutting device 13 is also provided in an area sandwiched between the left and right side wall portions 12, 12, and the cutting device 13 cuts the base of the crop with a pair of left and right rotary cutters that rotate around the vertical axis. . The cut stalks of the crops are rake-in to the conveying device 3 further rearward by rake-in rollers.

The conveying device 3 is connected to the rear end portions of the left and right side wall portions 12, 12 so as to be continuous, and has a conveying width substantially equal to the interval between the left and right side wall portions 12, 12. As shown in FIG. The conveying start end of the conveying device 3 is provided at a low position connected to the rear of the cutting device 13, and the conveying device 3 is provided in a rearward rising inclined posture so as to convey the stem culms rearward and upward of the machine body. The inside of the conveying device 3 is a conveying path for conveying the stalks of crops, and this conveying path is covered with a case 14 .

Although not described in detail, the case 14 has a pair of left and right side wall frames and a horizontal frame. A pair of left and right side wall frames extend along the transport direction. A plurality of horizontal frames are provided in the upper portion and the lower portion of the pair of left and right side wall frames with a space therebetween in the front-rear direction, and the pair of left and right side wall frames are connected by the plurality of horizontal frames. With this configuration, the case 14 is formed as a highly rigid structure that forms a substantially rectangular tubular transport path as a whole.

Scraping rotary bodies (not shown) are provided at appropriate intervals along the conveying path in the conveying apparatus 3 at upper and lower portions of the conveying path. The raking rotors on both upper and lower sides are driven to rotate about the horizontal axis in opposite directions, and the culms of the harvested crop are conveyed rearward while being sandwiched between the raking rotors on both upper and lower sides.

A pair of upper and lower cutting processing units 15 (corresponding to the "cutting device" of the present invention) for cutting the transported long stalks are provided at the end of transport of the transporting device 3 . Although not described in detail, the cutting processing unit 15 rotates around the horizontal axis on both upper and lower sides of the stalk transport path. The cutting unit 15 is provided with cutting blades covering the entire width in the conveying width direction at appropriate intervals in the circumferential direction on the outer peripheral portion of a cylindrical member that rotates around the axis that is oriented laterally to the machine body. The upper and lower cutting units 15 rotate in opposite directions to cut the stalk by sandwiching the stalk between the cutting blades on the upper and lower sides. The cutting unit 15 cuts the stem culms to a length (for example, 20 to 30 cm) that is easy to handle when the harvested product is loaded onto a transport vehicle and transported. A connection port to be connected to the separating device 4 is formed at the rear end portion of the conveying device 3 . This connection is formed in the conveying end region of the conveying device 3 and is the inlet through which the stalks of the crop are fed from the conveying device 3 to the separating device 4 . That is, the separating device 4 is connected to the rear part of the conveying device 3 and the cut culms are fed into the separating device 4 .

Although the details will be described later, the separating device 4 removes the stems and culms of the crops fed from the conveying end portion of the conveying device 3 by the ventilation action of the fan 20 rotating about the vertical axis Y1 (see FIG. 3 etc.). Contaminants such as fine stalk shavings and leaf cuts contained in are separated and discharged to the outside. The culms, which are heavier than the debris, are not sucked into the fan 20 and fall downwards as harvest.

A receiving hopper 5A for receiving and collecting the harvest discharged downward from the conveying device 3 is provided directly below the separating device 4 and below the rear end portion of the conveying device 3. . Harvested material received by the receiving hopper 5A is collected at the transport start end of the discharge conveyor 5. As shown in FIG. The receiving hopper 5A and the discharge conveyor 5 are constructed integrally. In other words, the receiving hopper 5A and the transport start end of the discharge conveyor 5 constitute a receiving section for receiving the harvested material and sending it backward.

The discharge conveyor 5 has substantially the same width as the conveying width of the conveying device 3, and conveys the harvested material rearward and upward. The discharge conveyor 5 is entirely supported by a frame body having a framework structure, and extends outward and upward from the fuselage from the rear lower portion of the fuselage. The discharge conveyor 5 has sprockets at both the left and right ends of the transport start end and the transport end. An endless rotatable chain (not shown) is wound between sprockets at the transport starting end and the transporting end, and a plurality of locking transport bodies are attached to the left and right endless rotatable chains at predetermined pitches. A plurality of locking conveyors are attached to the endless rotating chain and lock and convey the harvested material.

The endless rotatable chain is configured to be rotatable by a discharge conveyor hydraulic motor 18 provided at a position on the conveying end side of the discharge conveyor 5. Driven to go round. That is, the conveying path is formed above the rotation track of the endless rotating chain, and the return path is formed below the rotating track of the endless rotating chain. A rotating track for the dynamic chain is formed. When the endless rotating chain is driven to rotate, the harvested material is received and supported by a loading guide plate (not shown) provided at the bottom of the conveying path of the discharge conveyor 5, and is locked by the locking carrier. It is transported and discharged outwardly from the transport end.

A bent portion 16 is provided at the central portion in the longitudinal direction of the discharge conveyor 5, and the bent portion 16 is configured to be rotatable about a horizontally extending rotation axis X1. The discharge conveyor 5 is positioned at a conveyance start side portion 5L on the base end side of the bent portion 16, a conveyance end side portion 5H on the tip side of the bent portion 16, and a tip end portion of the conveyance end side portion 5H. 5, and a discharge section 17, which is the end of the conveying section. The bent portion 16 connects the end portion of the transfer end portion 5L and the start portion of the transfer end portion 5H so that the transfer end portion 5H can swing up and down with respect to the transfer end portion 5L.

The discharging conveyor 5 has an extended state in which the conveying terminal side portion 5H extends obliquely upward with respect to the conveying starting end side portion 5L, and a conveying terminal side from the position of the conveying terminal side portion 5H when the discharging conveyor 5 is in the extended state. The state can be changed between a bent state in which the portion 5H is located on the lower side. In other words, the discharge conveyor 5 is configured to be bendable at the bent portion 16 . When the sugarcane harvester is transported by a truck or the like, the transport terminal side portion 5H of the discharge conveyor 5 is bent to keep the overall height of the sugarcane harvester low.

A discharging portion 17 is provided at the conveying terminal side portion 5H of the discharge conveyor 5. The discharging portion 17 is arranged from the rotation axis X1 of the bent portion 16 so that the discharge angle of the harvested material can be adjusted at the conveying terminal side portion 5H. are also configured to be able to swing around the rotation axis X2 on the conveying end side. The discharging portion 17 is configured to be vertically swingable with respect to the conveying end portion 5H. A guide plate 19 is connected to the tip of the discharge portion 17 . The guide plate 19 is configured to be vertically swingable about the rotation axis X3 with respect to the discharge section 17, and is configured to be capable of guiding the falling direction of the harvest discharged from the discharge section 17. As shown in FIG.

Although not described in detail, the discharge conveyor 5 is rotatably supported by the frame of the machine body at the transport start end portion around the vertical axis. The entire discharge conveyor 5 is supported by the frame of the machine body so as to be rotatable about the vertical axis. Although not shown, a hydraulic cylinder for changing the discharge position is provided, and the discharge conveyor 5 can be switched between an attitude toward the rear of the machine body and an attitude toward the lateral side and outward of the machine body by extending and contracting the hydraulic cylinder. It is configured.

During operations other than harvesting, such as traveling on roads or entering fields, the driver switches the discharge conveyor 5 to a position facing the rear of the machine. Although not shown, when the sugarcane harvester performs harvesting work in the field, a truck for collecting harvested products runs alongside the sugarcane harvester. When the transport vehicle runs side by side, the longitudinal direction of the discharge conveyor 5 is switched to the side where the transport vehicle is located, and the harvested material is discharged from the transport end of the discharge conveyor 5 to the platform of the transport vehicle.

[About the separation device]
Details regarding the separating device 4 will be explained on the basis of FIGS. 3 to 5. FIG. FIG. 3 is a side sectional view showing the inside of the separation device 4. As shown in FIG. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3 showing the interior of the separation device 4 in a plan view. FIG. 5 is a rear view showing a discharge port 21h at the rear of the discharge portion 21 as viewed from the front.

The separating device 4 is equipped with a fan 20 , a discharge section 21 and a processing section 22 . The discharge part 21 is provided above the fan 20 . A discharge port 21h having an obliquely downward cross section is provided in the upper rear portion of the discharge portion 21, and the discharge portion 21 discharges contaminants from the discharge port 21h. The processing section 22 is provided below the fan 20 . 22 h of openings are provided in the lower end part of the processing part 22, and the processing part 22 lets the harvest thrown into the downward direction of the fan 20 fall from 22 h of openings, and sucks for the fan 20 from 22 h of openings. The fan 20 is sandwiched between the discharge section 21 and the processing section 22, and the fan 20 rotates counterclockwise in plan view to generate an upward wind for sorting the wind. The air for sorting air is sucked from the opening 22h of the processing section 22 and flows toward the discharge port 21h of the discharge section 21 .

The cutting processing unit 15 cuts the crops and inputs them to the processing unit 22 . The stalks of crops are cut by the cutting processing section 15, and then thrown into the processing section 22 from a connection port at the end of transportation of the transportation device 3 at an ejection angle of about 45 degrees. When the stalks of crops are fed from the conveying device 3 to the separating device 4, contaminants such as stalk shavings and leaf chips mixed with the stalks and conveyed are blown upward by the wind for sorting the stalks. The object passes through the fan 20 and is discharged from the discharge port 21h of the discharge portion 21 to the outside. Since the stalks of the crops are heavier than the impurities, they are not blown upward by the wind for wind sorting and fall from the opening 22h to the receiving hopper 5A below.

The processing unit 22 extends downward from the vertical central portion of the connecting portion between the conveying device 3 and the separating device 4, and has a narrowed portion 22a (corresponding to the “first narrowed portion” of the present invention) at the lower end of the processing portion 22. do) are formed. The details of the narrowed portion 22a will be described later.

A scattering prevention chain 22C is connected to the constricted portion 22a, and the scattering prevention chain 22C hangs down to near the upper end of the receiving hopper 5A shown in FIG. The processing portion 22 is formed in a cylindrical shape in a plan view, and the anti-scattering chain 22C is connected to the peripheral portion of the rear half of the processing portion 22 formed in the cylindrical shape. It is conceivable that the harvested material fed from the conveying device 3 to the processing section 22 is vigorously thrown backward and downward from the processing section 22 from the conveying device 3 generally along a parabola. Even in such a case, the harvested material is received by the anti-scattering chain 22C and drops directly into the receiving hopper 5A. This reduces the risk of the harvested material falling outside the receiving hopper 5A.

As shown in FIG. 4, the fan 20 is composed of three blades and is configured to be rotatable about a vertical axis Y1 by the power of a fan hydraulic motor 20M. The processing portion 22 is formed in a cylindrical shape in plan view. As the fan 20 rotates, part of the air for sorting air may swirl along the inner wall of the processing section 22 . At this time, there is a possibility that part of the contaminants may swirl along the inner wall portion of the processing section 22 without being sucked upward. In order to avoid such an inconvenience, a plurality of wind direction plates 23 are provided on the inner wall portion of the processing portion 22 formed in a cylindrical shape. In other words, a plurality of wind direction plates 23 are provided at intervals in the circumferential direction in the upper part of the inside of the processing section 22 .

Each of the wind direction plates 23 is inclined so that one end is positioned higher than the other end in a side view. That is, the clockwise end portion of the wind direction plate 23 is positioned lowest in plan view, and is inclined so as to be positioned higher toward the counterclockwise direction side in plan view. An upward swirling flow is generated as wind for sorting the wind, and the air of this swirling flow is efficiently guided upward by the wind direction plate 23 . As a result, even when contaminants swirl along the inner wall portion of the processing section 22, the contaminants are sucked into the fan 20 along with the upward swirling flow. The wind direction plate 23 is provided in a portion of the separation device 4 other than the connection port formed in the transfer end region of the transfer device 3 .

Further, as shown in FIG. 3 , the discharge portion 21 is larger in diameter than the processing portion 22 in plan view, and a stepped portion 24 is formed between the discharge portion 21 and the processing portion 22 . The stepped portion 24 is positioned above the fan 20 . Since the discharge port 21h is positioned at the rear of the discharge portion 21, the direction of the wind for sorting the wind blown by the fan 20 is bent from the upward direction to the rearward direction. In other words, the air for sorting the air hits the portion of the discharge portion 21 located right above the fan 20, and the direction of the air is changed backward at this portion. At this time, a surge pressure is generated in the front upper portion of the discharge portion 21, and a backflow is likely to occur, which may narrow the air passage between the fan 20 and the discharge port 21h. Therefore, as the diameter of the discharge portion 21 is expanded by the stepped portion 24, the surge pressure is received by the diameter-expanded portion W of the discharge portion 21, which is expanded by the stepped portion 24. is accumulated in As a result, a large cross-section of the air passage extending between the fan 20 and the discharge port 21h is ensured in the portion of the discharge portion 21 on the side where the vertical axis Y1 is located relative to the enlarged diameter portion W. The amount of wind for wind sorting is increased compared to when there is no .

A hydraulic cylinder 21C capable of changing the direction of the discharge port 21h is provided, and the discharge portion 21 is configured to be rotatable about the vertical axis Y1 by extending and contracting the hydraulic cylinder 21C. As shown in FIG. 5, the outlet 21h is configured to have a square cross section. A narrowed portion 21a (corresponding to the "second narrowed portion" of the present invention) is formed in a portion of the upper portion of the discharge portion 21 where the discharge port 21h is located, and the narrowed portion 21a is inclined downward toward the downstream side in the discharge direction. do. Further, chamfered portions 21b, 21b are formed at both left and right end portions of a portion of the lower portion of the discharge portion 21 where the discharge port 21h is located. The chamfered portions 21b, 21b are inclined toward the left-right center side toward the downstream side in the ejection direction, and are inclined upward toward the downstream side in the ejection direction. As a result, compared to a configuration in which the narrowed portion 21a and the chamfered portions 21b and 21b are not formed, the discharge range of the contaminants discharged from the discharge port 21h is narrowed obliquely downward, and the contaminants scatter in the uncut area. Fear is reduced.

[Regarding the intake part in the upper part of the conveying device]
When the wind for sorting wind is sucked into the processing section 22 from the opening 22h of the processing section 22, part of the wind meanders to the portion corresponding to the connection port between the cutting processing section 15 and the processing section 22. It is sucked by the fan 20. At this time, if a swirl is formed in the flow of air in the portion corresponding to the connection port between the cutting processing section 15 and the processing section 22, part of the air sucked from the opening 22h stays as a swirl. Since the vortex acts as a resistance to the suction of the fan 20, if the vortex is generated in the wind for sorting the air, there is a risk that the sorting of the air in the separation device 4 will not be performed efficiently. In order to avoid such inconvenience, as shown in FIGS. An intake portion 25a is provided. The top plate portion 25 is configured as a part of the case 14 and provided on the upper portion of the case 14 . In other words, the intake portion 25a is provided on the upper portion of the case 14 .

The intake section 25 a is provided in a portion corresponding to the conveying path between the cutting processing section 15 and the processing section 22 . The portion corresponding to the conveying path between the cutting processing section 15 and the processing section 22 is the section where the connection port to the processing section 22 in the conveying device 3 is located. The intake section 25a is provided on the front side of the aircraft body relative to the fan 20 and the processing section 22, and is provided at a position higher than the opening 22h.

The top plate portion 25 has an inclined portion 25I that is formed in a rearward rising posture, and a horizontal surface portion 25H that is located on the rear side of the inclined portion 25I and formed in a horizontal shape. The air intake portion 25a is provided at a rearward rising inclined portion 25I formed at the upper end portion of the top plate portion 25. As shown in FIG. A rear end portion of the horizontal surface portion 25H is connected to the separation device 4 . The air entering the inside of the processing section 22 from the intake section 25a is sucked by the fan 20 as it is without meandering. The wind direction plate 23 is provided at the same height as the intake section 25a.

As shown in FIG. 6, the air for sorting air is sucked into the processing section 22 through the opening 22h and the air intake section 25a, and sucked by the fan 20. As shown in FIG. At this time, part of the air sucked from the opening 22h meanders toward the connection port between the cutting processing section 15 and the processing section 22, but joins the flow of the air sucked from the suction section 25a. It is sucked by the fan 20. As a result, the amount of air sucked by the fan 20 is increased, and the air separation in the separation device 4 is efficiently performed. In addition, a vortex is less likely to be formed in the portion corresponding to the conveying path between the cutting processing section 15 and the processing section 22, and the intake section 25a is not provided on the top plate section 25 at the rear upper end portion of the conveying device 3. In comparison, wind sorting in the separation device 4 is performed more efficiently.

[Regarding the throttle part in the processing part]
As shown in FIGS. 3 and 5, the processing section 22 extends downward from the vertical central portion of the connection port of the conveying device 3, and a constricted section 22a (first constricted section) is provided at the lower end of the processing section 22. As shown in FIGS. is formed. The narrowed portion 22a is inclined toward the inner diameter side toward the lower side. Therefore, the lower portion of the cylindrical processing portion 22 is formed in a downwardly tapered shape by the narrowed portion 22a, and the cross-sectional area of the portion of the processing portion 22 where the narrowed portion 22a is located decreases toward the bottom.

As shown in FIG. 6, the suction action of the fan 20 in the processing section 22 is attenuated as the fan 20 moves away from the fan position A0. Therefore, in the lower part of the processing section 22 , the wind velocity V of the air flowing upward toward the fan 20 is smaller than that in the upper part of the processing section 22 . In addition, since the area below the processing section 22 is open, the suction action of the fan 20 is further attenuated, and the wind speed V is further reduced. In the configuration in which the throttle portion 22a is provided in the lower portion of the processing portion 22, attenuation of the suction action of the fan 20 in the lower portion of the processing portion 22 is suppressed by the throttle portion 22a. A region between the lower position A1 and the lower position A2 is a region where the narrowed portion 22a is located, and attenuation of the wind speed V is suppressed in this region. In other words, since the minimum required sorting wind is required to act on the throttle portion 22a, the required wind speed V at the fan position A0 is small compared to the configuration in which the throttle portion 22a is not provided, and the fan 20 rotates. Less power. As a result, the suction action of the fan 20 in the processing section 22 is maintained as much as possible without increasing the power required for rotating the fan 20, and fine stalk waste, leaf chips, etc. mixed with the stalks of crops are removed. Contaminants are also separated in the lower part of the processing section 22 as much as possible.

A slit 22b is formed in the narrowed portion 22a along the circumferential direction. The harvested material falls from the opening 22h to the receiving hopper 5A below, but it is conceivable that the harvested material may be stored in the receiving hopper 5A due to, for example, the discharge conveyor 5 being stopped. In this case, as the harvested material accumulates in the receiving hopper 5A, the cross-sectional area through which the air sucked by the fan 20 can pass is reduced below the opening 22h, and the wind power for wind separation may be weakened. Even in such a case, the air can be sucked into the processing section 22 from the slit 22b, and the wind power for sorting the wind is maintained as much as possible.

[Another embodiment]
The present invention is not limited to the configurations exemplified in the above-described embodiments, and other representative embodiments of the present invention will be exemplified below.

(1) In the above-described embodiment, the air intake portion 25a is provided at a position higher than the opening 22h. may also be provided at a lower installation height.

(2) In the above-described embodiment, the suction unit 25a is provided at a portion corresponding to the transport path between the cutting processing unit 15 and the processing unit 22, but the suction unit 25a is provided at a portion not corresponding to the transport route. may be provided in

(3) In the above-described embodiment, the intake portion 25a is provided on the upper portion of the case 14, but the intake portion 25a may be provided on one or both of the left and right sides of the case 14. FIG. In this case, the configuration may be such that the top plate portion 25 is not provided.

(4) In the above-described embodiment, the air intake portion 25a is provided on the rear rising inclined portion 25I formed at the upper end portion of the top plate portion 25, but the air intake portion 25a may be provided on the horizontal surface portion 25H. good.

(5) In the above-described embodiment, the airflow direction plate 23 is provided at the same height as the intake section 25a. may be arranged lower than the arrangement height of the intake portion 25a. Further, the configuration may be such that the wind direction plate 23 is not provided.

(6) In the above-described embodiment, the stepped portion 24 is formed between the discharge portion 21 and the processing portion 22, but the stepped portion 24 may be omitted. In this case, the ejecting portion 21 may have a configuration in which the diameter is increased steplessly toward the upper side in plan view.

(7) In the above-described embodiment, the narrowed portion 22a is formed at the lower end portion of the processing portion 22, and the narrowed portion 22a is inclined toward the inner diameter side toward the bottom.

(8) In the above-described embodiment, the exhaust port 21h is provided with the narrowed portion 21a and the chamfered portions 21b, 21b. Further, the discharge port 21h is formed to have a diagonally downward cross section, but the discharge port 21h may be formed to have a sideways or rearward cross section, or may be formed to have a diagonal upward or upward cross section. May be.

It should be noted that the configurations disclosed in the above-described embodiments (including other embodiments; the same shall apply hereinafter) can be applied in combination with configurations disclosed in other embodiments unless there is a contradiction. Moreover, the embodiments disclosed in this specification are merely examples, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the scope of the present invention.

The present invention is applicable to sugarcane harvesters.

2: Harvesting unit 3: Conveying device 4: Separating device 14: Case 15: Cutting processing unit (cutting device)
20: Fan 21: Discharge part 21a: Throttle part (second throttle part)
21b: Chamfered portion 21h: Discharge port 22: Processing portion 22a: Constricted portion (first constricted portion)
22h: opening 23: wind direction plate 24: stepped portion 25: top plate portion (top plate)
25I: Inclined portion 25a: Intake portion

Claims (9)

A harvesting unit provided in the front lower part of the aircraft for harvesting the planted crops;
a conveying device having a rearward upward tilting attitude for conveying the crops harvested in the harvesting unit toward the rearward upper side of the machine body;
a separation device connected to the rear of the conveying device for separating the crops into contaminants and crops by wind sorting;
The separation device includes a fan that rotates around a vertical axis to generate the wind for sorting the wind, and a discharge port that is disposed above the fan and provided at the top, and the contaminants are discharged from the discharge port. a discharge part for discharging the harvested material, disposed below the fan , connected to the rear portion of the conveying device at an outer peripheral portion thereof, provided with an opening at the bottom thereof, and the harvested material introduced below the fan; a processing unit that drops from the opening and sucks air from the opening for the fan,
A sugar cane harvester, wherein an intake section is provided at the upper end of the conveying device at a position higher than the opening and introduces outside air from the outside of the conveying device for the fan. A cutting device that cuts the crop and puts it into the processing unit is provided on the upper part of the conveying device,
2. The sugarcane harvester according to claim 1 , wherein said intake section is provided at a portion corresponding to a conveying path between said cutting device and said processing section. The conveying device is provided with a case that covers the conveying route,
The sugarcane harvester according to claim 1 or 2 , wherein the intake section is provided at the upper end of the case. A top plate is provided on the upper part of the case,
4. The sugarcane harvester according to claim 3 , wherein the intake section is provided on a rearwardly rising inclined section formed at the upper end of the top plate. The sugarcane harvester according to any one of claims 1 to 4 , wherein a plurality of wind direction plates are provided at intervals in the circumferential direction in the upper part of the inside of the processing section. The wind direction plate is provided at the same height as the intake unit,
The sugarcane harvester according to claim 5 , wherein the wind direction plate is provided on the inner wall portion of the processing section . The sugarcane harvester according to any one of claims 1 to 6 , wherein the discharge section has a larger diameter than the processing section in a plan view, and a stepped portion is formed between the discharge section and the processing section. . A connection port connected to the processing unit is formed at the rear end of the transport device,
The processing portion extends downward from the upper and lower central portions of the connection port,
The sugarcane harvester according to any one of claims 1 to 7 , wherein the lower end of the processing section is formed with a first constricted section that slopes toward the inner diameter side toward the bottom. The outlet is configured to have a square cross section,
A second constricted portion that slopes downward toward the downstream side in the discharge direction is formed in a portion of the upper portion of the discharge portion where the discharge port is located,
A chamfered portion is formed at both left and right ends of a portion of the lower portion of the discharge portion where the discharge port is located, the chamfered portion being inclined toward the left and right central side toward the downstream side in the discharging direction and inclined upward toward the downstream side in the discharging direction. A sugar cane harvester according to any one of claims 1 to 8 .

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