JP2024011295A - Harvesting/conveying device and corn harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a harvesting/conveying device and corn harvester capable of preventing cornstalks from winding around a roller.

SOLUTION: A plate component 91 having a facing part 92 facing a blade part 63 from behind is provided at the rear of the blade part 63 of a stalk roller 23. This configuration can prevent cornstalks from winding around a part rearward the facing part 92 on a rear shaft of the stalk roller 23. Further, a mounting position of the plate component 91 relative to a harvesting-part frame 41 is adjustable, so as to appropriately adjust a distance between the facing part 92 of the plate component 91 and the blade part 63, and prevents the cornstalks from winding around the rear shaft between the facing part 92 and the blade part 63.

SELECTED DRAWING: Figure 11

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a harvesting and conveying device for harvesting and conveying corn tufts, and a corn harvesting machine equipped with the same.

A corn harvesting machine is provided at its front end with a harvesting and conveying device that harvests corn tufts (corn grains arranged in a tuft and wrapped in bracts) and transports them rearward. The corn tassels are transported from the harvesting transport device to the threshing device, where they are subjected to threshing processing (peeling of the bracts and grain removal).

A plurality of dividers are arranged side by side in the left-right direction (vehicle width direction) in the harvest conveyance device. Further, the harvesting conveyance device is provided with a pair of left and right deck plates, a pair of right and left stalk rollers, and a pair of left and right conveyance chains between each divider. There is a gap between the left and right deck plates. The left and right stalk rollers are provided below the left and right deck plates, respectively, so as to be rotatable about rotational axes extending in the front-rear direction. The left stalk roller is rotated clockwise when viewed from the front, and the right stalk roller is rotated counterclockwise when viewed from the front. The left and right conveyor chains are provided above the left and right deck plates, respectively. The conveyor chain is wound around a driving sprocket and a driven sprocket that are spaced apart from each other in the front-rear direction. The driving sprocket and the driven sprocket are each rotatably provided around a rotation axis extending in the vertical direction. The left conveyor chain is rotated clockwise when viewed from above, and the right conveyor chain is rotated counterclockwise when viewed from above.

In the field, corn is planted in rows. When harvesting corn, one row of corn planted in the field is introduced between adjacent dividers, and the corn stalks (culms) are placed between the left and right deck plates and between the left and right stalk rollers. and between the left and right conveyor chains. As the stalk rollers rotate, the left and right stalk rollers engage the corn stalk, and the blade section pulls down the stalk. At this time, the corn tassels attached to the stalks are received by the deck plate, and the corn tassels are separated from the stalks. The corn tassels separated from the stalks are conveyed rearward on the deck plate by a conveyor chain.

International Publication No. 2020/262610

In such a configuration, corn stalks may wrap around the rear end of the stalk roller. If the stem wraps around the rear end of the stalk roller, the stalk roller may stop rotating or be pushed forward, and a thrust load (axial load) is applied to the bearing that supports the front end of the stalk roller. There is a risk that the durability of the product may decrease.

An object of the present invention is to provide a harvest conveyance device and a corn harvester that can suppress corn stalks from wrapping around rollers (stoke rollers).

In order to achieve the above object, a harvesting and conveying device according to one aspect of the present invention is a harvesting and conveying device that is installed at the front end of a corn harvester to harvest and convey corn tassels, and includes a frame. The shaft is rotatably supported by the frame around a rotational axis extending in the front-rear direction of the corn harvester, and the blade extending from the shaft locks onto the corn stalk by rotation around the rotational axis. The present invention includes a roller that pulls down the corn stalks, and a plate component that is attached to the frame so that its position can be adjusted and has a facing portion that faces the blade portion from the rear side in the front-rear direction.

According to this configuration, as the roller rotates, the blade portion of the roller engages with the corn stalk, and the blade portion pulls down the corn stalk. At this time, the corn tufts attached to the corn stalk are prevented from moving downward, thereby separating the corn tassels from the corn stalk.

The shaft portion of the roller has a portion where the blade portion does not exist, at least at the end on the root side (rear end portion), and this portion is supported by the frame via a bearing or the like. Therefore, after the corn tassel is separated from the corn stalk, the corn stalk may wrap around the root end of the shaft, that is, the rear portion of the blade in the front-rear direction.

Therefore, a plate component is provided that has a facing portion that faces the blade portion from the rear side in the front-rear direction. Thereby, it is possible to suppress the corn stalk from wrapping around the portion of the shaft portion closer to the root than the opposing portion. In addition, since the mounting position of the plate part relative to the frame can be adjusted, by appropriately adjusting the distance between the facing part of the plate part and the blade part, it is possible to adjust the position of the shaft part between the facing part and the blade part. This prevents the stems from wrapping around each other.

Therefore, it is possible to satisfactorily suppress the corn stalk from being wrapped around the roller. As a result, it is possible to suppress the occurrence of poor rotation of the roller due to the corn stalk being wrapped around the roller. In addition, the blade part is no longer pushed forward by the corn stalk wrapped around the roller, and thrust load (axial load) can be suppressed from being applied to the bearings that support the rollers, improving the durability of the bearings.

The opposing part has a plate shape extending in the left-right direction of the corn harvester, and the plate component has a plate shape extending from the left end of the opposing part in the left-right direction to one side in the front-rear direction, and extends in the front-rear direction rather than the up-down direction. The left mounting part has a long left mounting hole penetrating through it, and the right mounting hole is longer in the front and rear direction than in the vertical direction, and is plate-shaped and extends from the right end of the opposing part in the front and back direction. It may have a structure in which it has a right attachment portion formed therethrough and is attached to the frame by bolts inserted into the left attachment hole and the right attachment hole, respectively.

With this configuration, the attachment position of the plate component to the frame can be adjusted.

The plate component may include a plate-shaped first reinforcing portion that extends from the lower end of the facing portion in the up-down direction to the side opposite to one side in the front-back direction and extends in the left-right direction.

This configuration makes it possible to increase the strength of the plate component. As a result, it is possible to suppress deformation of the plate component due to the facing portion of the plate component being hit by the corn stalk.

The plate component may include a plate-shaped second reinforcing section provided across the opposing section and the first reinforcing section.

This configuration allows the strength of the plate component to be further increased.

In addition, in a configuration in which the plate component has a second reinforcing portion, a mounting hole that is longer in the front-rear direction than in the vertical direction is formed through the second reinforcing portion, and a bolt inserted into the mounting hole allows the plate component to be attached to the frame. may be attached to.

With this configuration, the strength of attaching the plate component to the frame can be increased.

Two second reinforcing portions may be provided at intervals in the left-right direction.

The plate component may further include a plate-shaped third reinforcing part provided in the center between the two second reinforcing parts, spanning the opposing part and the first reinforcing part.

With this configuration, the strength of the plate component can be further increased.

The roller may have a guide portion on the distal end side of the blade portion, in which a spiral protrusion is formed on a conical peripheral surface that tapers toward the distal end side, and guides the corn stalk to the blade portion.

By providing the guide portion on the tip side of the blade portion, it is possible to suppress the corn stalk from wrapping around the portion of the shaft portion on the tip side of the blade portion.

A corn harvester according to another aspect of the present invention includes a machine body, a pair of left and right running devices that support the machine body and are driven by power from a power source provided in the machine body, and a pair of running devices provided in front of the machine body and the running device. and a harvesting and transporting device for harvesting and transporting corn tufts, the harvesting and transporting device includes a frame and a shaft portion rotatably supported by the frame around a rotational axis extending in the front-rear direction, By rotating around the shaft, the blade extending from the circumferential surface of the shaft engages with the corn stalk and pulls down the corn stalk.The roller is attached to the frame so that its position can be adjusted and rotates back and forth relative to the blade. and a plate component having opposing portions facing each other from the rear side in the direction.

This corn harvester can provide the same effects as those described regarding the harvest conveyance device according to one aspect of the present invention.

According to the present invention, it is possible to suppress corn stalks from wrapping around the rollers. As a result, it is possible to suppress the occurrence of poor rotation of the roller due to the corn stalk being wrapped around the roller. Additionally, it is possible to suppress thrust loads from being applied to the bearings that support the rollers, thereby improving the durability of the bearings.

FIG. 1 is a right side view of a corn harvester according to an embodiment of the present invention. FIG. 2 is a plan view of a corn harvester. FIG. 3 is a top view of the harvest conveyance device. FIG. 2 is a front view (view from the front) of a portion of the harvesting and conveying device. FIG. 3 is a bottom view of the harvesting conveyance device. It is a bottom view of a pair of left and right stalk rollers. Figure 3 is a bottom view of the stalk roller with one blade component removed; It is a front view of a pair of left and right stalk rollers. FIG. 3 is a top view showing the configuration of a transport mechanism. FIG. 2 is a cross-sectional view of the front end of the harvesting and conveying device taken along a cutting plane along the front-rear direction, viewed from the right. FIG. 3 is a perspective view of the rear end of the stalk roller viewed from the lower left front. FIG. 3 is a perspective view of the rear end of the stalk roller viewed from the lower left rear. FIG. 3 is a perspective view of the plate component viewed from the upper left rear. FIG. 3 is a perspective view of the plate component viewed from the upper right rear side. FIG. 2 is a rear view (view from the rear) of the harvesting conveyance device. FIG. 3 is a perspective view of the auger and the bottom plate and rear wall of the transport frame, viewed from the upper right front.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

<Overall configuration of corn harvester>
FIG. 1 is a right side view of a corn harvester 1 according to an embodiment of the present invention. FIG. 2 is a plan view of the corn harvester 1.

The corn harvesting machine 1 runs through the field, harvesting corn tassels (corn grains arranged in a tassel and wrapped in bracts), and threshing the corn tassels (hulling the corn tassels). This is an agricultural machine that peels corn grains and removes corn kernels.

In the following description, the forward direction of the corn harvester 1 is referred to as the front, and the backward direction of the corn harvester 1 is referred to as the rear. When the corn harvester 1 is viewed from the rear, the left side in the width direction is defined as the left side, and the right side in the width direction is defined as the right side.

The corn harvester 1 employs a pair of left and right crawler running devices 2 as running devices capable of traveling over uneven terrain such as fields. A body frame 3 is supported by the left and right crawler traveling devices 2, and power from an engine 4 provided on the body frame 3 is transmitted to the crawler traveling device 2 via a transmission 5.

Furthermore, a cabin 6, a threshing device 7, and a grain tank 8 are provided on the fuselage frame 3. In front of the crawler traveling device 2 and the body frame 3, a harvesting and conveying device 9 is provided that harvests the corn tassels and conveys them rearward. A feeder 10 is provided between the threshing device 7 and the harvest conveying device 9 to convey the corn tassels from the harvest conveying device 9 to the threshing device 7.

The cabin 6 is arranged on the front end of the fuselage frame 3. The cabin 6 provides a space in which the driver rides, and within this space, for example, a driver's seat 11 where the driver sits, a control lever 12 which the driver operates, etc. are arranged. A door 13 that can be opened and closed is provided on the right side of the cabin 6, and the driver can open the door 13 and get into the cabin 6.

The threshing device 7 is arranged at the rear left of the cabin 6. The grain tank 8 is arranged at the rear of the cabin 6 and to the right of the threshing device 7. In the threshing device 7, the bracts are peeled off from the corn tassels conveyed by the feeder 10, and corn grains (seed grains) are removed from the corn tassels from which the bracts have been peeled off. The corn grains are conveyed from the threshing device 7 to the grain tank 8 and stored in the grain tank 8. An unloader 14 is connected to the grain tank 8, and the corn grains stored in the grain tank 8 can be discharged from the grain tank 8 to the outside of the machine.

<Harvest conveyance device>
FIG. 3 is a top view of the harvest conveyance device 9. FIG. 4 is a front view (view from the front) of the harvest conveyance device 9. FIG. 5 is a bottom view of the harvest conveyance device 9.

The harvest conveyance device 9 includes four dividers 21. The four dividers 21 are arranged side by side at intervals in the left-right direction. The harvesting conveyance device 9 also includes a pair of left and right receiving plates 22 and a pair of left and right stalks for each space between the dividers 21 adjacent to each other in the left and right direction (hereinafter simply referred to as "between the dividers 21"). It includes a roller 23, a pair of left and right conveyance mechanisms 24, and an auger 25.

<Divider>
In plan view of the left end divider 21, the left edge 31 extends in the front-rear direction, and the right edge 32 extends at an angle with respect to the front-rear direction so that the further forward the divider 21 is, the closer it gets to the left edge 31. In the right end divider 21, in a plan view, the right edge 33 extends in the front-back direction, and the left edge 34 extends at an angle with respect to the front-rear direction so that the further forward the divider 21 is, the closer it gets to the right edge 33. The left end divider 21 and the right end divider 21 are symmetrical in plan view with respect to a straight line extending in the front-rear direction passing through the center of the harvesting and conveying device 9 in the left-right direction.

The two inner dividers 21 disposed between the left and right dividers 21 have the same configuration, and are inclined in the front-rear direction so that the left edge 35 and the right edge 36 approach each other toward the front in plan view. It is formed into a substantially isosceles triangular shape extending as follows.

The tips of the four dividers 21 are arranged at equal intervals in the left-right direction on a straight line extending in the left-right direction. Except for the tips of the four dividers 21, the left edge 35 of the two inner dividers 21 and the left edge 34 of the rightmost divider 21 are parallel, and the right edge 36 of the two inner dividers 21 and the left edge The right edge 32 of the divider 21 is parallel to the right edge 32 of the divider 21 . As a result, a guide space 37 is created between each divider 21, the width of which becomes narrower in the left-right direction toward the rear.

<Deck plate>
The pair of left and right receiving plates 22 have plate shapes extending in the front-rear direction and the left-right direction, and are arranged side by side in the left-right direction at the rear of the guide space 37 and are supported by the harvesting section frame 41 of the harvesting conveyance device 9. There is. A stem entry path 42 that extends linearly in the front-rear direction is provided between the left and right receiving plates 22 with a space therebetween.

<Stoke roller>
FIG. 6 is a bottom view of the pair of left and right stalk rollers 23.

The left and right pair of stalk rollers 23 are arranged below the left and right pair of receiving plates 22 in the left-right direction. That is, the left stalk roller 23 is provided below the left receiving plate 22 , and the right stalk roller 23 that is paired with the left stalk roller 23 is provided below the right receiving plate 22 that is paired with the left stalk roller 23 . It is provided below the stop plate 22 at the same height as the left stalk roller 23.

FIG. 7 is a bottom view of the stalk roller 23.

The stalk roller 23 includes a front shaft portion 43 that is rotatably provided around a rotation axis that extends in the front-rear direction, and a front shaft portion 43 that is rotatable around a rotation axis that extends in the front-rear direction with a space between the front shaft portion 43 and the front shaft portion 43 in the front-rear direction. A rear shaft portion 44 is provided, a guide portion 45 is provided to protrude forward from the front shaft portion 43, and a guide portion 45 is installed between the front shaft portion 43 and the rear shaft portion 44 to prevent rotation of the front shaft portion 43 and the rear shaft portion 44. Eight blade components 46 are arranged side by side in the direction (circumferential direction).

Note that FIG. 7 shows a state in which one blade component 46 has been removed.

The front shaft portion 43 integrally includes a cylindrical portion 51, a flange portion 52, a large cylindrical portion 53, and a cylindrical portion 54. The cylindrical portion 51 is formed into a cylindrical shape whose center line is the rotational axis of the front shaft portion 43 . The flange portion 52 is formed into a disk shape whose center line is the rotational axis of the front shaft portion 43 , is connected to the front end of the cylindrical portion 51 , and has an outer periphery extending outward from the circumferential surface of the cylindrical portion 51 . There is. The large cylindrical portion 53 is formed in a cylindrical shape extending forward from the outer peripheral edge of the flange portion 52 . The cylindrical portion 54 is formed in a cylindrical shape with its center line being the rotational axis of the front shaft portion 43, and extends forward from the flange portion 52.

The rear shaft portion 44 integrally includes a cylindrical portion 55 and a flange portion 56. The cylindrical portion 55 is formed into a cylindrical shape whose center line is the rotational axis of the front shaft portion 43 . The flange portion 56 is formed in the shape of an annular plate that extends from the center of the outer circumferential surface of the cylindrical portion 55 in the front-rear direction to the periphery.

The guide portion 45 is provided in front of the flange portion 52 of the front shaft portion 43. The guide portion 45 has a conical peripheral surface 57 whose center line is the rotational axis of the front shaft portion 43 . A spiral protrusion 58 is formed on the circumferential surface 57 . The cylindrical portion 54 of the front shaft portion 43 is coupled to the guide portion 45 in a relatively non-rotatable manner, and the guide portion 45 rotates together with the front shaft portion 43 .

The blade component 46 is provided across the cylindrical portion 51 of the front shaft portion 43 and a portion of the cylindrical portion 55 of the rear shaft portion 44 in front of the flange portion 56 . The blade component 46 is formed into a rectangular plate shape that extends in the front-rear direction, and includes a contact portion 61 that contacts the outer peripheral surfaces of the cylindrical portions 51 and 55, and both ends of the contact portion 61 in the short direction (front shaft portion 43). and a plate-shaped overlapping portion 62 extending in the radial direction of the cylindrical portions 51 and 55 from both ends of the rear shaft portion 44 in the rotational direction. The overlapping portion 62 is formed over the entire length of the contact portion 61 in the front-rear direction, and its front end portion is formed into a triangular plate shape that tapers toward the front.

FIG. 8 is a front view of a pair of left and right stalk rollers 23.

The blade components 46 adjacent to each other in the rotational direction of the front shaft portion 43 and the rear shaft portion 44 have overlapping portions 62 overlapped with each other. The overlapped portions 62 are welded at a plurality of locations spaced apart in the front-rear direction, so that adjacent blade components 46 are fixedly connected to each other. The contact portion 61 of each blade component 46 is fixed to the cylindrical portion 51 of the front shaft portion 43 and the cylindrical portion 55 of the rear shaft portion 44 by welding. As a result, the contact portions 61 of the eight blade components 46 have a substantially octagonal prism shape with the rotation axis of the front shaft portion 43 and the rear shaft portion 44 as the center line. Further, the overlapping portions 62 constitute blade portions 63 extending from the cylindrical portions 51 and 55 in the radial direction of the cylindrical portions 51 and 55, and the eight blade portions 63 are arranged in an eight-fold symmetry. , extend radially from the cylindrical parts 51, 55 at equal angular intervals in the radial direction of the cylindrical parts 51, 55.

As shown in FIG. 7, an inner ring of a bearing 64 is fitted onto the cylindrical portion 54 of the front shaft portion 43 so as to be relatively non-rotatable. The outer ring of the bearing 64 is non-rotatably held in a holder 65 supported by the harvester frame 41, as shown in FIG. On the other hand, as shown in FIG. 7, a collar 59 is fitted onto a portion of the cylindrical portion 55 of the rear shaft portion 44 rearward of the flange portion 56 so as to be relatively rotatable. The collar 59 is non-rotatably held in a gear case 66 fixed to the harvester frame 41, as shown in FIG. Thereby, the stalk roller 23 is supported by the harvesting section frame 41 so as to be rotatable around a rotation axis extending in the front-rear direction, in other words, to be rotatable around the center line of the front shaft section 43 and the rear shaft section 44 as a rotation axis. ing.

Although not shown, within the gear case 66, a drive transmission member is coupled to the cylindrical portion 55 of the rear shaft portion 44 in a relatively non-rotatable manner, and driving force is transmitted from the drive transmission member. Due to the driving force transmitted to the cylindrical portion 55, in the pair of left and right stalk rollers 23, the left stalk roller 23 is rotated clockwise, and the right stalk roller 23 is rotated counterclockwise.

<Transport mechanism>
FIG. 9 is a top view showing the configuration of the transport mechanism 24.

The pair of left and right transport mechanisms 24 are arranged above the pair of left and right receiving plates 22 in the left and right direction. That is, the left conveyance mechanism 24 is provided above the left receiving plate 22, and the right stalk roller 23, which is paired with the left stalk roller 23, is provided above the right receiving plate 22, which is paired with the left stalk roller 23. It is provided above the stop plate 22.

The transport mechanism 24 includes a driving sprocket 71, a driven sprocket 72, and a transport chain 73.

The gear case 66 rotatably holds a drive shaft 74 to which driving force is transmitted from a drive transmission member (not shown). The drive shaft 74 protrudes upward from the gear case 66, and the drive sprocket 71 is coupled to the portion of the drive shaft 74 that protrudes from the gear case 66 so as to be non-rotatable.

A bracket 75 is fixed to the front end of the receiving plate 22, and a driven shaft 76 is rotatably held by the bracket 75 via a bearing (not shown). The driven shaft 76 is located at the same position as the drive shaft 74 in the left-right direction, and is spaced apart from the drive shaft 74 in the front-rear direction. The driven shaft 76 projects above the receiving plate 22, and the driven sprocket 72 is coupled to a portion of the driven shaft 76 that projects above the receiving plate 22 so as to be non-rotatable.

The conveyor chain 73 is wound around a driving sprocket 71 and a driven sprocket 72. A plurality of locking portions 77 are provided on the conveyance chain 73 at equal intervals. The locking portion 77 has a substantially triangular plate shape that protrudes from the outer periphery of the conveyance chain 73, and specifically, the end surface facing rearward between the pair of left and right conveyance mechanisms 24 is inclined relatively largely with respect to the front-rear direction. An end face facing forward between the pair of left and right transport mechanisms 24 is formed into a substantially triangular plate shape with a relatively small inclination with respect to the front-rear direction.

Due to the driving force transmitted from the drive shaft 74 to the drive sprocket 71, in the pair of left and right transport mechanisms 24, the transport chain 73 of the left transport mechanism 24 is rotated clockwise when viewed from above, and the transport chain 73 of the left transport mechanism 24 is rotated clockwise when viewed from above. The conveyor chain 73 is rotated counterclockwise when viewed from above.

<Cover>
The transport mechanism 24 is covered from above by a cover 81 provided at the rear of each divider 21, as shown in FIG. The cover 81, which is provided behind the two inner dividers 21 in the left-right direction, has two positions around a swing shaft 82 extending in the left-right direction at the rear thereof: a closed position that covers the transport mechanism 24, and an open position that exposes the transport mechanism 24. It is configured so that it can be opened and closed.

FIG. 10 is a cross-sectional view of the front end of the harvesting conveyance device 9 taken along a cutting plane along the front-rear direction, viewed from the right.

An opening holding mechanism 83 is provided inside the cover 81 which is configured to be openable and closable. The open holding mechanism 83 includes a guide member 84 and a holding rod 85. The guide member 84 has a portion fixed to the harvesting section frame 41 and extending in the front-rear direction and the up-down direction, and a guide hole 86 extending in the front-rear direction is formed in that portion. One end of the holding rod 85 is connected to the cover 81 so as to be rotatable (swingable) about a rotation axis extending in the left-right direction. The other end of the holding rod 85 is inserted into the guide hole 86 and is held in the guide hole 86 so as to be movable along the guide hole 86 .

When the cover 81 is in the closed position, the other end of the holding rod 85 is located at the rear end of the guide hole 86. When the cover 81 is rotationally displaced from the closed position to the open position, the other end of the holding rod 85 moves forward in the guide hole 86 in accordance with the rotational displacement. A lower locking part 87 recessed downward from the guide hole 86 in a semicircular shape and an upper locking part 88 recessed upward in a semicircle shape from the guide hole 86 are formed at the front end of the guide hole 86. There is. When the cover 81 is in the open position, the other end (lower end) of the holding rod 85 is fitted into the lower locking portion 87, and movement of the holding rod 85 is prevented. Thereby, the cover 81 is held in the open position.

When the cover 81 is rotationally displaced from the open position to the closed position, the front end of the cover 81 is slightly lifted, and the other end of the holding rod 85 is disengaged from the lower locking part 87. Then, as the other end of the holding rod 85 is introduced into the guide hole 86 and the cover 81 is rotationally displaced from the open position to the closed position, the other end of the holding rod 85 moves backward through the guide hole 86. Move to. When the cover 81 is in the closed position, the other end of the holding rod 85 returns to the position at the rear end of the guide hole 86.

When the cover 81 is held in the closed position, the front end of the cover 81 may be hit by the worker's arm or shoulder from below, causing the front end of the cover 81 to lift up unintentionally by the worker and cause the cover 81 to be held in the closed position. The other end of the rod 85 may separate from the lower locking portion 87. At this time, if the other end of the holding rod 85 that has separated from the lower locking portion 87 enters the guide hole 86, the cover 81 may be displaced from the open position toward the closed position due to its own weight. Therefore, an upper locking portion 88 is formed. As a result, even if the front end of the cover 81 is lifted up unintentionally by the operator and the other end of the holding rod 85 is released from the lower locking portion 87, the other end of the holding rod 85 is moved to the upper locking portion 87. Thereafter, when the front end of the cover 81 is lowered by its own weight, the other end of the holding rod 85 is fitted into the lower locking part 87 again. As a result, it is possible to suppress the cover 81 from rotating from the open position to the closed position, which is not the operator's intention.

<Harvesting operation>
In the field, corn is planted in rows. When harvesting corn, the horizontal position of the corn harvester 1 is adjusted so that one row (row) of corn stalks (culms) planted in the field enters the guide space 37 between the dividers 21. Then, the corn harvester 1 is moved forward. As the corn harvester 1 moves forward, the corn stalks are guided by the divider 21 from the guide space 37 to the stalk entry path 42 between the left and right pair of receiving plates 22, between the left and right stalk rollers 23, and It enters between the pair of left and right transport mechanisms 24. Thereafter, when the corn stalk reaches between the guide portions 45 of the left and right stalk rollers 23, the corn stalk is guided by the guide portion 45 and introduced between the blade portions 63 of the left and right stalk rollers 23.

As shown in FIG. 8, when the left and right stalk rollers 23 rotate, a part of the circular locus TL drawn by the blade section 63 of the left stalk roller 23 and a part of the circular locus TL drawn by the blade section 63 of the right stalk roller 23 are drawn. The interval between their rotational axes, the outer diameters of the cylindrical parts 51 and 55, and the length of the blade part 63 are designed so that a part of the circular locus TR overlaps with the circular locus TR. Further, by further adjusting the amount of overlap between a part of the circular locus TL and a part of the circular locus TR, the left and right pair of stalk rollers 23 are able to touch the corn stalk that has entered between the left and right blade parts 63. It is designed so that a maximum of two blade portions 63 can be locked from both the left and right sides. Therefore, a maximum of four blade sections 63 in total are engaged with the corn stalk, and the corn stalk is pulled down by the blade sections 63 as the stalk roller 23 rotates.

The width of the stalk entry path 42 between the pair of left and right receiving plates 22 is set to such a width that the corn tassels cannot pass through. Therefore, when the corn stalk is pulled down, the corn tufts attached to the corn stalk are received by the receiving plate 22, and the corn tassels are separated from the corn stalk. The conveyance chain 73 runs around, and the locking part 77 of the conveyance chain 73 running around locks on the corn tuft separated from the corn stalk, so that the corn tassel moves backward on the receiving plate 22. transported.

<Plate parts>
FIG. 11 is a perspective view of the rear end portion of the stalk roller 23 viewed from the lower left front. FIG. 12 is a perspective view of the rear end portion of the stalk roller 23 viewed from the lower left rear.

After the corn stalks are removed from the corn stalks, the corn stalks remain planted in the field. Therefore, if the rear shaft portion 44 of the stalk roller 23 is exposed, there is a risk that the corn stalk may wrap around the rear shaft portion 44 after the corn stalk passes through between the blade portions 63 of the left and right stalk rollers 23 .

Therefore, a plate component 91 is provided behind the blade portion 63 of the stalk roller 23.

FIG. 13 is a perspective view of the plate component 91 viewed from the upper left rear. FIG. 14 is a perspective view of the plate component 91 viewed from the upper right rear side.

The plate component 91 has a plate shape extending in the left-right direction and the up-down direction by, for example, bending a metal plate, and has an opposing portion 92 that collectively faces the blade portions 63 of the left and right pair of stalk rollers 23 from behind. a left mounting part 93 having a plate shape extending forward from the left end of the facing part 92; a right mounting part 94 having a plate shape extending forward from the right end of the facing part 92; It has a first reinforcing portion 95 extending rearward with a width of .

Two left mounting holes 96 are formed through the left mounting portion 93 . Two right mounting holes 97 are formed through the right mounting portion 94 . The left mounting hole 96 and the right mounting hole 97 are both long holes that are longer in the front-rear direction than in the up-down direction.

Further, the plate component 91 has two second reinforcing portions 98 . One of the second reinforcing parts 98 is formed in a substantially triangular plate shape extending in the front-rear direction across the opposing part 92 and the left end of the first reinforcing part 95. It is formed in a substantially triangular plate shape extending in the front-rear direction across the right end portion of the first reinforcing portion 95 and the right end portion of the first reinforcing portion 95 . The second reinforcing portion 98 is fixed to the opposing portion 92 and the first reinforcing portion 95 by welding. A mounting hole 99, which is an elongated hole that is longer in the front-rear direction than in the up-down direction, is formed through the second reinforcing portion 98.

Further, the plate component 91 has a third reinforcing portion 101 at the center between the two second reinforcing portions 98 . The third reinforcing portion 101 is formed in a substantially triangular plate shape extending in the front-back direction across the opposing portion 92 and the first reinforcing portion 95, and is fixed to the opposing portion 92 and the first reinforcing portion 95 by welding.

Further, in the facing portion 92, a receiving portion 102 for receiving the flange portion 56 of the rear shaft portion 44 of the left and right stalk rollers 23 is formed as a recessed portion recessed downward from the upper end. The mounting position of the plate component 91 is adjusted so that the left and right flange portions 56 are received in the receiving portion 102. By adjusting the mounting position, the opposing portion 92 of the plate component 91 faces the blade portion 63 of the stalk roller 23 without leaving a gap through which the corn stalk can enter, as shown in FIG. Then, with the position of the plate component 91 adjusted, the plate component 91 is harvested by bolts 103 inserted into the two left mounting holes 96, the two right mounting holes 97, and the two mounting holes 99, respectively. It is fixed to the section frame 41.

<Transportation section frame>
FIG. 15 is a rear view (view from the rear) of the harvesting conveyance device 9.

The harvest transport device 9 includes a transport frame 111 . The transport section frame 111 is provided at the rear of the harvest section frame 41, as shown in FIG. As shown in FIG. 15, the transport section frame 111 includes a left wall section 112, a bottom plate section 113, and a rear wall section 114. Further, although not shown, the transport section frame 111 includes a right wall section that is disposed opposite to the left wall section 112 with an interval in the right direction. The bottom plate portion 113 is provided spanning between the left wall portion 112 and the right wall portion. The rear wall portion 114 extends upward continuously from the rear end of the bottom plate portion 113.

FIG. 16 is a perspective view of the auger 25, the bottom plate portion 113 and the rear wall portion 114 of the conveyor frame 111, viewed from the upper right front.

The bottom plate portion 113 has an arcuate cross section that bulges downward when cut along the front-rear direction.

A rectangular opening 115 is formed at the left end of the rear wall portion 114 so as to pass through the rear wall portion 114 . A lower part of the opening 115 is closed by the bottom plate part 113, and the part of the opening 115 that is not closed by the bottom plate part 113 functions as an outlet for discharging the corn tassels. Note that, hereinafter, the portion of the opening 115 that functions as a discharge port will be referred to as the "discharge port 115."

The auger 25 is arranged above the bottom plate part 113 and in front of the rear wall part 114. The auger 25 includes an auger shaft 116 extending in the left-right direction and an auger blade 117 provided around the auger shaft 116.

The auger shaft 116 is installed on the left wall 112 and the right wall of the conveyor frame 111, and is rotatably supported by the left wall 112 and the right wall.

The auger blade 117 is divided into a left auger blade 118 and a right auger blade 119. The left auger blade 118 is formed in a left-handed helical shape around the auger shaft 116, extending from the left opposing position facing the center of the discharge port 115 in the left-right direction from the front and the left end of the auger shaft 116. . The right auger blade 119 is formed in a right-handed helical shape around the auger shaft 116, extending from the right opposing position facing the center of the discharge port 115 in the left-right direction from the front and the right end of the auger shaft 116. There is.

In the configurations shown in FIGS. 15 and 16, the left opposing position where the right end of the left auger blade 118 is located and the right opposing position where the left end of the right auger blade 119 is located are the same position in the left-right direction; This is the same position as the center of the outlet 115. The right end of the left auger blade 118 and the left end of the right auger blade 119 are at the same position in the left-right direction, but at different positions in the rotational direction of the auger shaft 116.

Furthermore, a locking protrusion 121 is provided on the auger 25 so as to span the circumferential surface of the auger shaft 116 and the auger blade 117 . A plurality of locking projections 121 are formed in a triangular plate shape spanning the circumferential surface of the auger shaft 116 and the right auger blade 119, and each locking projection 121 extends in the rotational axis direction of the auger shaft 116, that is, in the left-right direction. There is. Further, one locking projection 121 is formed in a triangular plate shape spanning the circumferential surface of the auger shaft 116 and the left auger blade 118, and the locking projection 121 extends in the left-right direction. By providing the locking protrusion 121, the strength of the auger blade 117 (left auger blade 118 and right auger blade 119) is increased.

A driving force is transmitted to the auger shaft 116 from a drive transmission mechanism (not shown). The auger shaft 116 is rotated clockwise when viewed from the right by its driving force.

<Transport operation>
The corn tassels transported rearward by the pair of left and right transport mechanisms 24 fall backward from the receiving plate 22 and are received by the bottom plate 113 of the transport frame 111 . The corn tassels received by the bottom plate part 113 at a position to the left of the discharge port 115 are conveyed to the right by the left auger blade 118, and are delivered to the bottom plate part 113 at a position to the right of the discharge port 115. The received corn tassels are conveyed to the left by the right auger blade 119. The corn tassels that have been conveyed from the front to a position facing the discharge port 115 are sandwiched between the left auger blade 118 and the right auger blade 119, and are sandwiched between the left auger blade 118 and the right auger blade 119. The rotation of the auger blade 119 causes the liquid to be discharged through the discharge port 115 . The corn tassels discharged from the discharge port 115 are conveyed toward the threshing device 7 by the feeder 10.

<Effect 1>
As described above, behind the blade portion 63 of the stalk roller 23, the plate component 91 having the opposing portion 92 facing the blade portion 63 from the rear is provided. Thereby, it is possible to suppress the corn stalk from wrapping around the portion of the rear shaft portion 44 of the stalk roller 23 that is rearward of the opposing portion 92 . Further, since the mounting position of the plate component 91 with respect to the harvesting section frame 41 is adjustable, the distance between the opposing portion 92 of the plate component 91 and the blade portion 63 can be adjusted appropriately, and the distance between the opposing portion 92 and the blade portion 63 can be adjusted appropriately. Corn stalks can be prevented from wrapping around the rear shaft portion 44 between the rear shaft portion 63 and the rear shaft portion 44 .

Therefore, it is possible to satisfactorily suppress the corn stalk from wrapping around the stalk roller 23 (the entire rear shaft portion 44). As a result, it is possible to suppress the occurrence of rotation failure of the stalk roller 23 due to the corn stalk being wrapped around the stalk roller 23. In addition, the blade portion 63 is not pushed forward by the corn stalk wrapped around the stalk roller 23, and thrust load (axial load) can be suppressed from being applied to the bearing 64 etc. that supports the stalk roller 23. Improves durability.

The facing part 92 has a plate shape extending in the left-right direction of the corn harvester 1, the plate component 91 has a plate shape extending forward from the left end of the facing part 92, and the left mounting hole 96 is longer in the front-rear direction than in the up-down direction. The left mounting part 93 is formed by penetrating the left mounting part 93, and the right mounting part 94 is formed by penetrating the right mounting hole 97, which has a plate shape and extends forward from the right end of the opposing part 92, and is longer in the front-rear direction than in the vertical direction. It is attached to the harvesting section frame 41 by bolts 103 inserted through the left attachment hole 96 and the right attachment hole 97, respectively. With this configuration, the attachment position of the plate component 91 to the harvesting section frame 41 can be adjusted.

The plate component 91 also includes a first reinforcing portion 95 that extends rearward from the lower end of the opposing portion 92 by a predetermined width in the left-right direction. With this configuration, the strength of the plate component 91 can be increased. As a result, deformation of the plate component 91 due to the facing portion 92 of the plate component 91 being hit by the corn stalk can be suppressed.

The plate component 91 has a plate-shaped second reinforcing section 98 that is provided across the opposing section 92 and the first reinforcing section 95 . With this configuration, the strength of the plate component 91 can be further increased.

In addition, a mounting hole 99 that is longer in the front-rear direction than in the vertical direction is formed through the second reinforcing portion 98, and in addition to the bolt 103 that is inserted through the left mounting hole 96 and the right mounting hole 97, the bolt 103 is inserted through the mounting hole 99. Plate part 91 is attached to harvester frame 41 by means of bolts 103 . With this configuration, the strength of attaching the plate component 91 to the harvesting section frame 41 can be increased.

The plate component 91 further includes a plate-shaped third reinforcing part 101 provided at the center between the two second reinforcing parts 98 and spanning the opposing part 92 and the first reinforcing part 95. . With this configuration, the strength of the plate component 91 can be further increased.

The stalk roller 23 has a spiral protrusion 58 formed on a conical circumferential surface 57 that tapers toward the tip on the tip side with respect to the blade section 63, and a guide section 45 that guides the corn stalk to the blade section 63. have. By providing the guide portion 45, it is possible to suppress the corn stalk from wrapping around the front shaft portion 43 of the stalk roller 23.

<Effect 2>
The blade portion 63 of the stalk roller 23 has eight-fold symmetry. When the left and right stalk rollers 23 rotate, a part of the circular locus TL drawn by the blade part 63 of the left stalk roller 23 and a part of the circular locus TR drawn by the blade part 63 of the right stalk roller 23 are formed. The interval between their rotation axes, the outer diameters of the cylindrical parts 51 and 55, and the length of the blade part 63 are designed so that they overlap. Thereby, cutting of the corn stalk by the blade portion 63 can be prevented.

Further, in the configuration in which the blade portion 63 has eight-fold symmetry, it is possible to easily secure a clearance to avoid collision between the blade portion 63 of the left stalk roller 23 and the blade portion 63 of the right stalk roller 23.

By preventing the corn stalks from being cut by the blade portion 63, it is possible to prevent corn tassels from being transported with cut stalks attached, and to prevent the corn stalks from being transported inside the harvesting conveyance device 9 or inside the corn harvester 1. It is possible to suppress the accumulation of stalks that have come off the corn tassels.

The left and right pair of stalk rollers 23 are provided below each of the left and right pair of receiving plates 22, and two blade portions 63 each engage the corn stalk that has entered between the receiving plates 22 from the left and right sides. It is designed to. With this configuration, a total of four blade sections 63 are engaged with the corn stalk, so that the force applied to the corn stalk from the blade section 63 can be dispersed well, and the corn stalk can be pulled down favorably by the blade section 63. As a result, the corn tassels can be separated well from the corn stalks, and it is possible to further prevent the stalks separated from the corn tassels from staying in the harvesting and conveying device 9 or in the body of the corn harvester 1.

The blade portions 63 may extend radially from the rear shaft portion 44 at equal angular intervals in the radial direction of the rear shaft portion 44 .

Further, the stalk roller 23 includes eight blade components 46 arranged around the rear shaft portion 44 in the rotational direction of the rear shaft portion 44 . The blade component 46 integrally includes a contact portion 61 that contacts the rear shaft portion 44 and a plate-shaped overlapping portion 62 extending in the radial direction of the rear shaft portion 44 from both ends of the contact portion 61 in the rotational direction. are doing. The blade portion 63 is constructed by overlapping the overlapping portions 62 of the blade components 46 adjacent in the rotation direction. With this configuration, the strength of the blade portion 63 can be increased.

<Effect 3>
The conveyor frame 111 includes a bottom plate part 113 and a rear wall part 114 that extends upward continuously from the rear end of the bottom plate part 113. A discharge port 115 is formed through the rear wall portion 114 . Above the bottom plate part 113 and in front of the rear wall part 114, an auger 25 is provided so as to be rotatable about a rotation axis extending in the left-right direction. The corn tassels transported rearward by the transport mechanism 24 are received by the bottom plate portion 113 of the transport section frame 111. The corn tassels received by the bottom plate part 113 are conveyed on the bottom plate part 113 toward the discharge port 115 as the auger 25 rotates, and are discharged through the discharge port 115.

The auger 25 includes an auger shaft 116 that is rotatably supported by the conveyor frame 111, and a left auger blade 118 and a right auger blade 119 are formed around the auger shaft 116 in a spiral shape that winds in reverse directions. has been done. When the auger shaft 116 is rotated, the left auger blade 118 and the right auger blade 119 rotate together with the auger shaft 116. The corn tassels received by the bottom plate part 113 at a position to the left of the discharge port 115 are conveyed to the right by the left auger blade 118, and are delivered to the bottom plate part 113 at a position to the right of the discharge port 115. The received corn tufts are conveyed to the left by the right auger blade 119. The left auger blade 118 is formed to a left facing position facing the center of the discharge port 115 in the left-right direction from the front, and the right auger blade 119 is formed to a right facing position facing the center of the discharge port 115 from the front. As a result, the corn tassels transported to a position between the left facing position and the right facing position are sandwiched between the left auger blade 118 and the right auger blade 119, and the left auger blade The rotation of the blades 118 and the right auger blade 119 causes the liquid to be discharged through the discharge port 115.

Therefore, in this configuration, the raking blades that are required in the conventional configuration to discharge the corn tassels from the outlet are not required. Since there are no raking blades, it is possible to prevent the corn tassels from being blown forward by the auger 25. As a result, head loss caused by the corn tassels being blown forward and falling onto the field can be reduced.

The auger 25 further includes a plate-shaped locking protrusion 121 provided across the circumferential surface of the auger shaft 116 and the right auger blade 119.

In the configuration in which the discharge port 115 is formed at a position offset to the left of the center of the rear wall portion 114 in the left-right direction, the right auger blade is 119 becomes longer. Since the plate-shaped locking projection 121 is formed across the circumferential surface of the auger shaft 116 and the right auger blade 119, the locking projection 121 locks on the corn tuft, and the right auger blade As the corn tassel 119 rotates, the corn tuft is smoothly conveyed to the right auger blade 119 without slipping. As a result, the conveyance performance of the corn tassels by the auger 25 can be improved.

<Modified example>
Although one embodiment of the present invention has been described above, the present invention can also be implemented in other forms.

For example, in the embodiment described above, the left opposing position where the right end of the left auger blade 118 is located and the right opposing position where the left end of the right auger blade 119 is located are the same position in the left-right direction, and the discharge port A configuration that is the same as the center position of 115 was taken up. However, in the left-right direction, the left facing position and the right facing position may be the same position, and the position may be different from the central position of the discharge port 115. Further, the left facing position may be located to the left of the center position of the discharge port 115 in the left-right direction, and the right facing position may be located to the right of the center position of the discharge port 115 in the left-right direction.

Further, although the blade portion 63 of the stalk roller 23 extends in the rotational radial direction of the stalk roller 23, the blade portion 63 may extend in a direction inclined with respect to the rotational radial direction of the stalk roller 23. .

The blade portion 63 of the stalk roller 23 preferably has 8-fold symmetry, but may also have 4-fold symmetry, 6-fold symmetry, or rotational symmetry of 10-fold or more.

Further, similarly to the conventional configuration, the auger 25 may be provided with a scraping blade between the left auger blade 118 and the right auger blade 119 for discharging the corn tassels from the discharge port 115. good.

In addition, various design changes can be made to the above-described configuration within the scope of the claims.

1: Corn harvester 2: Crawler traveling device (traveling device)
4: Engine (power source)
9: Harvesting transport device 41: Harvesting section frame (frame)
43: Front shaft part (shaft part)
44: Rear shaft part (shaft part)
45: Guide portion 57: Surrounding surface 58: Protrusion 63: Blade portion 91: Plate component 92: Opposing portion 93: Left mounting portion 94: Right mounting portion 95: First reinforcement portion 96: Left mounting hole 97: Right mounting hole 98: Second reinforcement part 99: Mounting hole 101: Third reinforcement part 103: Bolt

Claims (9)

A harvesting and conveying device that is installed at the front end of a corn harvester and harvests and conveys corn tufts,
frame and
A shaft portion is rotatably supported by the frame around a rotation axis extending in the front-rear direction of the corn harvester, and rotation around the rotation axis causes a blade portion extending from the shaft portion to engage with the corn stalk. a roller that stops and pulls down the corn stalk;
A harvesting and conveying device, comprising: a plate component that is attached to the frame so that its position can be adjusted and has a facing portion that faces the blade portion from the rear side in the front-rear direction. The opposing part has a plate shape extending in the left-right direction of the corn harvester,
The plate part is
a left mounting part having a plate shape extending from the left end of the facing part in the left-right direction to one side in the front-rear direction, and having a left mounting hole penetrating therethrough that is longer in the front-rear direction than in the up-down direction;
a right mounting part having a plate shape extending from the right end of the facing part in the left-right direction to the one side in the front-back direction, and having a right mounting hole penetrating therethrough that is longer in the front-rear direction than in the up-down direction; , has
The harvesting and conveying device according to claim 1, wherein the harvesting and conveying device is attached to the frame by bolts inserted through the left attachment hole and the right attachment hole, respectively. The plate component has a plate-shaped first reinforcing portion extending from a lower end of the facing portion in the up-down direction to a side opposite to the one side in the front-back direction and extending in the left-right direction. The harvesting and conveying device according to item 2. 4. The harvesting and conveying device according to claim 3, wherein the plate component includes a plate-shaped second reinforcing section provided astride the opposing section and the first reinforcing section. A mounting hole that is longer in the front-rear direction than in the up-down direction is formed through the second reinforcing part,
5. The harvesting and conveying device according to claim 4, wherein the plate component is attached to the frame by bolts inserted into the attachment holes. The harvesting and conveying device according to claim 4 or 5, wherein two of the second reinforcing portions are provided at an interval in the left-right direction. Claim 6: The plate component includes a plate-shaped third reinforcing part provided in the center between the two second reinforcing parts, spanning the opposing part and the first reinforcing part. The harvesting conveyance device described in . The roller has a guide portion on a distal end side of the blade portion, in which a spiral protrusion is formed on a conical peripheral surface that tapers toward the distal end, and guides the corn stalk to the blade portion. , The harvesting and conveying device according to claim 1. The aircraft and
a pair of left and right traveling devices that support the aircraft body and are driven by power from a power source provided in the aircraft body;
a harvesting and conveying device that is provided in front of the machine body and the traveling device and harvests and conveys the corn tassels;
The harvest conveyance device includes:
frame and
A shaft portion is rotatably supported by the frame around a rotation axis extending in the front-rear direction, and rotation around the rotation axis causes a blade portion extending from the shaft portion to lock onto the corn stalk, thereby cutting the corn stalk. A roller that pulls down the stem,
A corn harvester comprising: a plate component that is attached to the frame in a position-adjustable manner and has a facing portion that faces the blade portion from the rear side in the front-rear direction.

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