JP2017093403A - Corn harvesting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corn harvesting machine that can secure a distance from the ground in the lifting of the flail mower, while suppressing upsizing of a lifting/lowering mechanism for lifting and lowering a flail mower to a longitudinal direction.SOLUTION: A 4-section link 46 of a lifting/lowering mechanism 16 includes a first link 51 and a second link 52 for connecting a frame 47 with a flail mower 15. The first link 51 includes a first frame side supporting unit 51a supported to the frame 47 and a first mower side connection unit 51b connected to the flail mower 15. The second link 52 includes a second frame side supporting unit 52a supported to the frame 47 and a second mower side connection unit 52b connected to the flail mower 15. An interval between the first frame side supporting unit 51a and the first mower side connection unit 51b is longer than that between the second frame side supporting unit 52a and the second mower side connection unit 52b. A movement locus C2 of the second mower side connection unit 52b is positioned at the side of the first frame side supporting unit 51a from a movement locus C1 of the first mower side connection unit 51b.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a corn harvester including a flare mower supported so as to be movable up and down.

  As described in Patent Document 1, for example, the corn harvester has a four-wheel traveling vehicle body including front wheels and rear wheels. The traveling vehicle body includes a cutting device for harvesting corn at the front side portion, and a bucket at the rear side portion. Corn harvested by the mowing device is carried by a conveyor provided between the mowing device and the bucket and stored in the bucket.

  Moreover, the corn harvester of patent document 1 is equipped with a flare mower between the front wheel and the rear wheel at the lower part of the traveling vehicle body. The flare mower is moved between an ascending position and a descending position by an elevating mechanism. In Patent Document 1, the lifting mechanism includes a single rod-like link and a lifting cylinder. The link includes a frame side support portion rotatably supported by the frame of the traveling vehicle body, and a mower side connection portion connected to the flare mower at a position spaced rearward from the frame side support portion. When the lifting cylinder operates, the flare mower swings in the vertical direction with the frame side support portion as a fulcrum. During the harvesting operation, the corn harvester places the flare mower in the lowered position to process the residue left on the field. When the harvesting operation is finished, the corn harvester moves with the flare mower placed in the raised position.

JP 2014-20984 A

  When the corn harvester is moved out of the field, when the corn harvester gets over the level difference, the traveling vehicle body may be tilted upward toward the front. When the traveling vehicle body is in such a posture, the flare mower disposed on the lower side of the traveling vehicle body easily comes into contact with the ground. Therefore, when the corn harvester gets over the level difference, it is necessary to keep the flare mower sufficiently raised from the ground. Here, in the lifting mechanism of Patent Document 1, when increasing the lifting distance of the flare mower, the distance between the frame side support portion and the mower side fixing portion of the link must be increased. ) Increases in the front-rear direction.

  The subject of this invention is providing the corn harvester which can ensure the distance from the ground when raising a flermore, suppressing the enlargement to the front-back direction of an raising / lowering mechanism in view of such a point. .

In order to solve the above problems, a corn harvester of the present invention includes a traveling vehicle body, a flare mower, and an elevating mechanism that raises and lowers the flare mower between a lowered position and an elevated position above the lowered position. The lifting mechanism includes a frame of the traveling vehicle body, the flare mower, a first link extending in the front-rear direction of the traveling vehicle body to connect the frame and the flare mower, and the front and rear portions above the first link. A four-joint link having a second link extending in a direction and connecting the frame and the flare mower, the first link including a first frame side support portion rotatably supported by the frame, and the flare mower. A first mower-side connection portion that is rotatably connected to the second link, and the second link includes the first frame-side support portion in the front-rear direction and the first link A second frame side support portion rotatably supported by the frame between the first mower side connection portion and a second mower side connection portion rotatably connected to the flare mower; The first distance between the first frame side support portion and the first mower side connection portion in the second link is a first distance between the second frame side support portion and the second mower side connection portion in the second link. When the flare mower is in the raised position longer than a third distance than the third distance between the first frame side support portion and the second mower side connection portion when the flare mower is in the lowered position. The fourth distance between the first frame side support portion and the second mower side connection portion is shorter.

  According to the present invention, the flare mower is supported on the frame of the traveling vehicle body via the first link and the four-bar link including the second link disposed above the first link. Further, the first distance between the frame side support portion and the first mower side connection portion in the first link is the second distance between the second frame side support portion and the second mower side connection portion in the second link. Longer than the third distance between the first frame side support portion and the second mower side connection portion when the flare mower is in the lowered position, and the first frame side support portion when the flare mower is in the raised position; The fourth distance between the second mower side connection portion is shorter. Thus, when the four-bar link is displaced and the flail mower moves upward, the flail mower posture changes. Therefore, when the flare mower is raised, the distance from the ground can be secured by utilizing the change in the posture of the flare mower. Therefore, it is easier to secure the distance between the ground and the flare mower when the flare mower is raised, compared to the case where the flare mower is lifted and lowered by supporting it with a single link rotatably attached to the frame. In addition, since the distance between the flare mower and the ground is secured by utilizing the change in the attitude of the flare mower, the flail mower is lifted and lowered compared to the case where the flare mower is supported by a single link that is rotatably attached to the frame. It can suppress that a mechanism enlarges in the front-back direction.

  In the present invention, the elevating mechanism includes a first posture in which the second mower side connection portion is equal to or lower than a height of the second frame side support portion, and the second mower side connection portion is the second frame side support portion. It is desirable to provide a second link moving mechanism for displacing the second link between the second posture exceeding the height of the second link. In this way, when the flare mower is raised, it is easy to change the posture of the flare mower to a posture inclined in the front-rear direction.

  In the present invention, in order to move the second link, the second link moving mechanism may include a hydraulic cylinder fixed to the frame as a drive source.

  In the present invention, the traveling vehicle body includes a front wheel and a rear wheel, and the flare mower is located behind the rear wheel. When the flare mower is arranged at the rear side portion of the traveling vehicle, the flare mower easily comes into contact with the ground when the traveling vehicle body is inclined upward toward the front when overcoming the step. In such a case, in the present invention, when the flare mower is raised, the distance from the ground is secured by utilizing the change in the attitude of the flare mower, so that it is easy to secure a large distance between the ground and the flare mower. Further, since the distance between the flare mower and the ground is secured by utilizing the change in the attitude of the flare mower, it is possible to suppress the lifting mechanism from being enlarged in the front-rear direction. Therefore, it is easy to avoid the flare mower from contacting the ground.

According to the present invention, the elevating mechanism displaces the flare mower to a posture inclined in the front-rear direction while moving the flare mower upward. Therefore, it is possible to secure the distance between the ground and the flare mower when the flare mower is raised by using the change in the posture of the flare mower. In addition, since the distance between the ground and the flare mower is secured by using the change in the attitude of the flare mower, the lifting mechanism is enlarged in the front-rear direction even when the distance from the ground when the flare mower is raised is secured. This can be suppressed.

It is a perspective view of the corn harvester to which this invention is applied. It is a side view of the rear part of a corn harvester. It is a perspective view of a flail mower and a raising / lowering mechanism. It is explanatory drawing of the raising / lowering operation | movement of a flermore. It is explanatory drawing of the raising / lowering mechanism of a flermore.

  Hereinafter, a corn harvester to which the present invention is applied will be described with reference to the drawings.

(overall structure)
FIG. 1 is a perspective view of a corn harvester to which the present invention is applied. Fig.1 (a) is a perspective view at the time of seeing a corn harvester from diagonally upper front, FIG.1 (b) is a perspective view at the time of seeing a corn harvester from diagonally upper rear. As shown in FIG. 1, the corn harvester 1 of this example has a four-wheel traveling vehicle body 2. In the following description, the traveling direction when the corn harvester 1 (traveling vehicle body 2) travels straight is the front-rear direction X, the direction along the ground and perpendicular to the front-rear direction X is the width direction Y, the front-rear direction X, and the width direction. A direction orthogonal to Y is defined as a vertical direction Z.

  The traveling vehicle body 2 includes a cutting device 4 that harvests corn ahead of the front wheels 3. The traveling vehicle body 2 includes a bucket 5 at the rear end portion. Between the reaping device 4 and the bucket 5, a conveyor 6 and a skinning device 7 are arranged in this order from the front to the rear. The skinning device 7 and the bucket 5 are located above the rear wheel 8. The corn is mowed along with the stem by the mowing device 4. Then, it is separated into stems and fruits by the mowing device 4. Thereafter, the corn fruits are conveyed rearward by the conveyor 6 and put into the skinning device 7. The corn fruits are peeled while passing through the skinning device 7 while being transported backward by the skinning device 7. The fruits in the peeled state are discharged rearward from the skinning device 7 and put into the bucket 5.

  Further, the traveling vehicle body 2 includes a cabin 9 on which a driver gets on and an engine mounting portion 11 on which an engine 10 is mounted, between the cutting device 4 and the bucket 5. The cabin 9 is located above the front wheel 3. The engine mounting portion 11 is located between the front wheel 3 and the rear wheel 8. The engine mounting unit 11 mounts a radiator or the like for cooling the engine 10. Further, the traveling vehicle body 2 includes a flare mower 15 below the bucket 5 and behind the rear wheel 8.

  The flare mower 15 is also called a hammer knife mower. The flare mower 15 is moved between the lowered position 15A and the raised position 15B by the lifting mechanism 16 (see FIG. 4). The corn harvester 1 arranges the flare mower 15 at the lowered position 15A during the harvesting operation, and processes the residue left on the field by the flare mower 15. When the harvesting operation is completed, the corn harvester 1 places the flare mower 15 at the raised position 15B and moves to the outside of the field.

Here, a hydraulic transmission device (not shown) is mounted on the engine mounting portion 11. The hydraulic transmission device includes a hydraulic pump driven by the engine 10 and a hydraulic motor driven by oil supplied by the hydraulic pump. In the corn harvester 1 of this example, the power of the engine 10 is transmitted to the wheels 3 and 8 via a hydraulic transmission. Therefore, the corn harvester 1 travels with the power output from the hydraulic motor. Moreover, in the corn harvester 1 of this example, the motive power of the engine 10 is transmitted to the mowing device 4, the conveyor 6, the skinning device 7, and the flail mower 15 through a hydraulic transmission. Accordingly, the mowing device 4, the conveyor 6, the skinning device 7, and the flare mower 15 are driven by the power output from the hydraulic motor.

(Flairmore)
FIG. 2 is a side view of the rear portion of the corn harvester 1. In FIG. 2, the flare mower 15 is arranged at the lowered position 15A. FIG. 3 is a perspective view of the flare mower 15 and the lifting mechanism 16 for raising and lowering the flare mower 15.

  As shown in FIG. 2, the flare mower 15 includes a rotating shaft 21 extending in the width direction Y and a plurality of flail claws 22 attached to the outer peripheral portion of the rotating shaft 21 so as to be swingable. Further, the flare mower 15 includes a cover 23 that covers the rotating shaft 21 and the flail claws 22. As shown in FIG. 3, the cover 23 extends in the width direction Y between a pair of left and right side cover plates 24 located at both ends of the flare mower 15 in the width direction Y and the pair of side cover plates 24, An upper cover plate 25 that covers the rotating shaft 21 and the upper portion of the flail claw 22 is provided. A pair of left and right connecting plates 26 are provided in the central portion of the upper cover plate 25 in the width direction Y. The lifting mechanism 16 is connected to the connecting plate 26.

  Further, the flare mower 15 includes a hydraulic motor 27 disposed above the upper cover plate 25 and an endless belt 28 spanned between the hydraulic motor 27 and the rotating shaft 21 outside the one side cover plate 24. The hydraulic motor 27 is rotationally driven by oil supplied from a hydraulic pump driven by the power of the engine 10. The rotation of the hydraulic motor 27 is transmitted to the rotary shaft 21 via the endless belt 28.

  As shown in FIG. 2, when the flare mower 15 at the lowered position 15 </ b> A is viewed from the width direction Y, the side cover plate 24 includes a lower end edge portion 31 extending substantially parallel to the ground and a front end of the lower end edge portion 31. A front first inclined edge portion 32 inclined upward from the front to the front, a front edge portion 33 extending upward from the front end of the front first inclined edge portion 32, and a rearward upward from the upper end of the front edge portion 33 An inclined front second inclined edge portion 34 is provided. Further, the side cover plate 24 extends upward from the rear end of the rear first inclined edge portion 35 and the rear first inclined edge portion 35 inclined upward rearward from the rear end of the lower end edge portion 31. A rear edge portion 36, a rear second inclined edge portion 37 inclined forward from the upper end of the rear edge portion 36, and a front upward from the upper end of the rear second inclined edge portion 37. An inclined rear third inclined edge portion 38 and an upper edge portion 39 connecting the rear third inclined edge portion 38 and the front second inclined edge portion 34 are provided. The flail claw 22 protrudes downward from the lower end edge portion 31 of the pair of side cover plates 24.

  The flare mower 15 includes a roller 41. The roller 41 includes a pair of left and right roller support arms 42 attached to each side cover plate 24, and a roller body 43 rotatably spanned between rear end portions of the pair of roller support arms 42. Each roller support arm 42 has a rod shape. In a state where the flare mower 15 is disposed at the lowered position 15 </ b> A, each roller support arm 42 extends downward from each side cover plate 24 in a direction inclined rearward. The roller body 43 rotates around an axis extending in the width direction Y between the pair of roller support arms 42.

(Elevating mechanism)
4 and 5 are explanatory views of the raising and lowering operation of the flare mower 15. FIG. 4A shows a state where the flare mower 15 is in the lowered position 15A, and FIG. 4B shows a state where the flare mower 15 is in the raised position 15B. In FIG. 5, the state where the mower 15 is at the raised position 15B is indicated by a solid line, and the state where the mower 15 is at the lowered position 15A is indicated by a chain line. 4 and 5, a part of the frame 47 of the traveling vehicle body 2 is cut away so that the structure of the elevating mechanism 16 can be understood.

As shown in FIG. 3, the elevating mechanism 16 includes a hydraulic cylinder 45 and a four-joint link 46. The four-node link 46 includes a frame 47 of the traveling vehicle body 2, a flare mower 15, a pair of first links 51 that extend in the front-rear direction X to connect the frame 47 and the flare mower 15, and a front-rear direction X above the first link 51. And a pair of second links 52 connecting the frame 47 and the flare mower 15. Here, the pair of first links 51 are arranged symmetrically about the hydraulic cylinder 45 in the width direction Y. Further, the pair of second links 52 are arranged symmetrically with respect to the hydraulic cylinder 45 in the width direction Y. In each of the first link 51 and the second link 52, the member located on the left side in the width direction Y and the member located on the right side have the same configuration. Therefore, the first link 51 and the second link 52 positioned on the left side will be described, and the description of the first link 51 and the second link 52 positioned on the right side will be omitted.

  The first link 51 is a rod-shaped member and extends in the front-rear direction X. The front end portion of the first link 51 is a first frame side support portion 51 a that is rotatably supported by the frame 47. The first link 51 rotates around an axis extending in the width direction Y in the first frame-side support portion 51a. The rear end portion of the first link 51 is a first mower-side connecting portion 51 b that is rotatably connected to the connecting plate 26 of the flare mower 15. The first link 51 rotates around an axis extending in the width direction Y at the first mower side connection portion 51b. As shown in FIG. 4, the first frame side support portion 51 a is connected to a position close to the axle 53 of the rear wheel 8 in the frame 47. When the flare mower 15 is at the lowered position 15A, as shown in FIG. 4A, the first link 51 is inclined downward toward the rear.

  The second link 52 is a rod-like member that is shorter than the first link 51. The second link 52 extends in the front-rear direction X above the first link 51. The front end portion of the second link 52 is a second frame side support portion 52 a supported by the frame 47.

  The second frame side support portion 52a is rotatable in a support plate portion 54 provided between the first frame side support portion 51a of the first link 51 and the first mower side connection portion 51b in the front-rear direction X in the frame 47. It is supported by. The second link 52 rotates around an axis extending in the width direction Y in the second frame side support portion 52a.

  The rear end portion of the second link 52 is a second mower-side connection portion 52 b that is rotatably connected to the connecting plate 26 of the flare mower 15. The second mower side connection portion 52b is connected to the upper side of the first mower side connection portion 51b in the connecting plate 26. The second link 52 rotates around an axis extending in the width direction Y at the second mower side connection portion 52b. As shown in FIG. 4A, when the flare mower 15 is in the lowered position 15A, the second link 52 extends substantially parallel to the ground.

  Here, as shown in FIG. 3, the first distance L1 between the first frame side support portion 51 a and the first mower side connection portion 51 b in the first link 51 is the second frame side support in the second link 52. It is longer than the second distance L2 between the portion 52a and the second mower side connection portion 52b.

  Next, the elevating mechanism 16 includes a second link moving mechanism 55 that rotates (moves) the second link 52 around the second frame side support portion 52a. As shown in FIG. 3, the second link moving mechanism 55 includes a hydraulic cylinder 45 as a drive source, and a connecting member 58 that connects the piston 57 and the second link 52 of the hydraulic cylinder 45.

  The hydraulic cylinder 45 is installed on the frame 47 with the moving direction of the piston 57 in the front-rear direction X. The hydraulic cylinder 45 is arranged in such a posture that the piston 57 moves forward from the cylinder 59. In the state where the flare mower 15 is in the lowered position 15 </ b> A, the hydraulic cylinder 45 has the proximal end portion of the piston 57 accommodated in the cylinder 59.

The connection member 58 includes a columnar shaft portion 61 extending in the width direction Y and an arm portion 62 extending upward from the central portion of the shaft portion 61 in the width direction Y. The upper end portion of the arm portion 62 is rotatably connected to the tip portion of the piston 57. That is, the upper end portion of the arm portion 62 is a piston side connection portion 58 a that is rotatably connected to the piston 57. The arm portion 62 (connection member 58) rotates around the axis extending in the width direction Y at the tip portion of the piston 57. Both end portions in the width direction Y of the shaft portion 61 are fixed to the second frame side support portions 52 a of the pair of second links 52. That is, both end portions of the shaft portion 61 are second link side fixing portions 58 b fixed to the second link 52. The axis of the shaft portion 61 coincides with the rotation center of the second link 52 in the second frame side support portion 52a.

  Here, the connection member 58 and the second link 52 are fixed in a state where the arm portion 62 and the second link 52 intersect at an acute angle. Accordingly, as shown in FIG. 4A, when the flare mower 15 is in the lowered position 15A, the second link 52 extends from the second frame side support portion 52a rearward substantially in parallel to the ground. On the other hand, the connection member 58 (arm portion 62) extends upward from the second frame side support portion 52a of the second link 52 toward the rear.

(Up and down motion of frame mower)
As shown in FIG. 4A, in the state where the flare mower 15 is at the lowered position 15 </ b> A, the base end side portion of the piston 57 of the hydraulic cylinder 45 is accommodated in the cylinder 59. The connecting member 58 (arm portion 62) is inclined downward from the tip portion of the piston 57 toward the front. The second link 52 extends substantially parallel to the ground between the connecting member 58 and the flare mower 15. The first link 51 is inclined downward from the frame 47 toward the rear. Each roller support arm 42 of the roller 41 extends in a direction inclined backward from each side cover plate 24 toward the lower side. The roller body 43 protrudes below the side cover plate 24.

  Here, when the hydraulic cylinder 45 is driven and the piston 57 moves forward in a direction parallel to the ground, the connection member 58 and the second link 52 integrally fixed to the connection member 58 cause the second frame side support portion 52a to move. Rotate to center.

  As a result, the arm portion 62 of the connection member 58 has a posture in which the piston-side connection portion 58a moves forward relative to the second frame-side support portion 52a and is inclined upward toward the front. In the second link 52, the second mower side connecting portion 52b moves upward and forward. As a result, as shown in FIG. 4 (b), the second link 52 changes from a posture substantially parallel to the ground (first posture) to an upwardly inclined posture (second posture), and the flare mower 15 is moved. Pull up. In addition, as the second link 52 rotates around the second frame side support portion 52a, the first link 51 rotates upward with the first frame side support portion 51a as a fulcrum. Thereby, since the 1st mower side connection part 51b of the 1st link 51 rises, the flare mower 15 moves upwards and is arrange | positioned in the raise position 15B.

  Here, as shown in FIG. 5, when the flare mower 15 is in the lowered position 15A, the position of the mower side connecting portion 52b of the second link 52 is 52bL, and when the flare mower 15 is in the raised position 15B, the second link 52 is provided. The position of the mower side connecting portion 52b is defined as 52bU. The first link 51 has a third distance L3 between the first frame-side support 51a and the mower-side connection 52bL, and a fourth distance L4 between the first frame-side support 51a and the mower-side connection 52bU. Stipulate. In this way, the fourth distance L4 is shorter than the third distance L3. In other words, when a virtual circle passing through the mower side connection portion 52bL is drawn around the first frame side support portion 51a, the mower side connection portion 52bU is located inside the virtual circle. As a result, the flare mower 15 assumes a forward leaning posture that inclines toward the first frame-side support portion 51a as it rises.

In the state where the flare mower 15 is disposed at the raised position 15B, the front first inclined edge portion 32 of the side cover plate 24 is substantially parallel to the ground as shown in FIG. 4 (b). And the lower end edge part 31 in the side cover board 24 inclines upwards toward back from the rear end of the front 1st inclination edge part 32. As shown in FIG. The roller 41 is in a state in which the roller support arm 42 extends substantially parallel to the ground, and the roller body 43 is positioned above the front first inclined edge portion 32 in the side cover plate 24.

  Next, when the flare mower 15 is lowered, the hydraulic cylinder 45 is driven and the piston 57 moves rearward in the front-rear direction X from the state shown in FIG. Accordingly, the connection member 58 and the second link 52 fixed integrally to the connection member 58 rotate around the second frame side support portion 52a.

  As a result, as shown in FIG. 4A, in the arm portion 62 of the connection member 58, the piston side connection portion 58a is moved rearward from the second frame side support portion 52a, and is inclined upward toward the rear. Become posture. In the second frame 47, the second mower side connecting portion 52b moves downward and rearward. As a result, the second link 52 returns to a posture substantially parallel to the ground and pushes the flare mower 15 downward. In addition, as the second link 52 rotates around the second frame side support portion 52a, the first link 51 rotates downward with the first frame side support portion 51a as a fulcrum. Thereby, since the 1st mower side connection part 51b of the 1st link 51 descend | falls, the flare mower 15 moves below and is arrange | positioned in the fall position 15A.

  According to this example, when the piston 57 operates by driving the hydraulic cylinder 45, the flare mower 15 assumes a forward leaning posture inclined forward while moving upward. Therefore, the distance from the ground when the flare mower 15 is raised can be secured by utilizing the change in the posture of the flare mower 15. Therefore, it is easier to secure the distance between the ground and the flare mower 15 when the flare mower 15 is lifted, compared to the case where the flare mower 15 is lifted and lowered by being supported by a single link that is rotatably attached to the frame 47. . In addition, since the distance between the flare mower 15 and the ground is ensured by using the change in the posture of the flare mower 15, it is compared with the case where the flare mower 15 is supported by a single link rotatably attached to the frame 47 and moved up and down. And it can suppress that the raising / lowering mechanism 16 enlarges in the front-back direction X.

  In this example, the movement locus C2 of the second mower side connection portion 52b when the piston 57 is operated is located closer to the first frame side support portion 51a than the movement locus C1 of the first mower side connection portion 51b. Thus, it is easy to tilt the flare mower 15 forward while moving it upward.

  Here, in the corn harvester 1 of this example, the flare mower 15 is located behind the rear wheel 8 of the traveling vehicle body 2. Therefore, when the traveling vehicle body 2 is inclined upwards when traveling over a step, the flare mower 15 is likely to come into contact with the ground.

  In this example, the elevating mechanism 16 secures a distance from the ground when the flare mower 15 is raised by using a change in the posture of the flare mower 15 in this example. Therefore, as compared to the case where the flare mower 15 is supported by a single link rotatably attached to the frame 47 and lifted, the distance between the ground and the flare mower 15 is ensured to be large when the flare mower 15 is raised. Cheap. In addition, since the distance between the flare mower 15 and the ground is ensured by using the change in the posture of the flare mower 15, it is compared with the case where the flare mower 15 is supported by a single link rotatably attached to the frame 47 and moved up and down. And it can suppress that the raising / lowering mechanism 16 enlarges in the front-back direction X. Therefore, it can be avoided that the flare mower 15 contacts the ground.

DESCRIPTION OF SYMBOLS 1 ... Corn harvesting machine 2 ... Traveling vehicle body 3 ... Front wheel 8 ... Rear wheel 15 ... Flail mower 15A ... Flail mower descending position 15B ... Freil mower rising position 16 ... Lifting Mechanism 45 ... Hydraulic cylinder 46 ... Four-node link 47 ... Frame 51 ... First link 51a ... First frame side support part 51b ... First mower side connection part 52 ... 2nd link 52a ... 2nd frame side support part 52b ... 2nd more side connection part 55 ... 2nd link moving mechanism C1 ... Movement locus C2 ... 1st more side connection part movement locus 2 More side connection part movement locus L1 ... 1st distance L2 ... 2nd distance L3 ... 3rd distance L4 ... 4th distance X ... Front-back direction

In the present invention, the elevating mechanism may include a second link moving mechanism that displaces the second link, and the second link moving mechanism may include a hydraulic cylinder as a drive source .

Claims (4)

A traveling vehicle body,
With flermore,
An elevating mechanism that raises and lowers the flare mower between a lowered position and an elevated position above the lowered position,
The elevating mechanism includes a frame of the traveling vehicle body, the flare mower, a first link extending in the front-rear direction of the traveling vehicle body to connect the frame and the flare mower, and extending in the front-rear direction above the first link. A four-link having a second link connecting the frame and the flare mower,
The first link includes a first frame side support portion rotatably supported by the frame, and a first mower side connection portion rotatably connected to the flare mower,
The second link rotates to the flare mower and a second frame side support portion rotatably supported by the frame between the first frame side support portion and the first mower side connection portion in the front-rear direction. A second mower side connection portion freely connected,
The first distance between the first frame side support portion and the first mower side connection portion in the first link is the second frame side support portion and the second mower side connection portion in the second link. Longer than the second distance between
The first frame side when the flare mower is in the raised position rather than the third distance between the first frame side support portion and the second mower side connection portion when the flare mower is in the lowered position. A corn harvesting machine, wherein a fourth distance between a support part and the second mower side connection part is shorter. In claim 1,
The elevating mechanism includes a first posture in which the second mower side connection portion is equal to or lower than a height of the second frame side support portion, and the second mower side connection portion determines a height of the second frame side support portion. A corn harvester comprising a second link moving mechanism for displacing the second link between the second posture exceeding the second posture. In claim 2,
The corn harvester, wherein the second link moving mechanism includes a hydraulic cylinder fixed to the frame as a driving source. In any one of claims 1 to 3,
The traveling vehicle body includes a front wheel and a rear wheel,
The corn harvester is characterized in that the flare mower is located behind the rear wheel.

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