JP3694127B2 - Combine harvester structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a combine harvester structure, and more particularly to a tension mechanism for a lower conveyance chain in the harvester structure.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a combine harvester that includes a lower transport chain that transports a stock of a harvested cereal meal, a tension roller is attached to keep the tension of the chain substantially constant.
[0003]
[Problems to be solved by the invention]
However, when the tension roller moves to perform the tension operation, the distance from the guide rod provided opposite to the same chain changes, the gripping force on the cereals changes, and if the gripping force becomes weak, it is being conveyed. When the cereals fall off and become stronger, there is a problem that frictional resistance increases, power loss increases, and wear of the same chain is promoted.
[0004]
[Means for Solving the Problems]
Therefore, in the present invention, in the harvesting part structure of the combine equipped with the lower conveying chain that conveys the stock of the harvested cereal straw, the drive sprocket and the tension roller of the lower transportation chain are used to transport the stock of the harvested grain straw. The tension roller is pivotally supported at a position close to the rear part of the grain haul conveying path, and the tension roller is movable, and the lower conveying chain between the drive sprocket and the tension roller is arranged substantially parallel to the grain haul conveying path. Further, a combine harvester structure characterized in that the tension roller can be moved substantially parallel to the cereal conveyance path (R) and the tension of the lower conveyance chain is held substantially constant. It is to be provided.
[0005]
Moreover, it has the following features.
[0006]
The tension roller is pivotally supported on the tip end of the tension arm, and the pivot is disposed in the vicinity of the perpendicular line extending from the axis of the tension roller to the grain conveying path, and the base end of the tension arm is disposed on the pivot. It was pivotably supported.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the tension roller of the lower transfer chain is pivotally supported on the tip end portion of the tension arm, and the base end portion of the tension arm is positioned on the extension line of the vertical line that is lowered from the axis of the tension roller to the grain conveying path. By urging the tension roller in the outward direction with the spring, the tension roller can be moved substantially parallel to the cereal conveying path, and by urging the tension roller in the outward direction with the spring, the lower conveying chain and this The distance from the guide rods provided facing each other can be kept substantially constant regardless of the movement of the tension roller. Accordingly, it is possible to apply a substantially constant tension to the lower transport chain while maintaining a substantially constant gripping force acting on the cereal.
[0008]
【Example】
Embodiments of the present invention will be described with reference to the drawings.
[0009]
FIG. 1 shows a triple-cut combine A equipped with a tension mechanism for a lower conveying chain according to the present invention. In the figure, 1 is a track frame equipped with a pair of left and right crawler type traveling devices 2, and 3 is the above-mentioned A machine base erected on the track frame 1, 4 is a threshing unit in which a feed chain 5 is stretched on the left side and a handling cylinder 6 and a processing cylinder 7 are built in, 8 is a cutting part equipped with a cutting blade cereal conveying mechanism, 9 Is a waste disposal unit equipped with a waste chain 10 and a waste cutter 11, 12 is a driving unit equipped with a driver's seat 13 and a driving operation unit 14, 15 is a motor unit incorporating an engine 16, 17 is a grain tank, Reference numeral 18 denotes a milling cylinder, and 19 is a rocking and sorting unit equipped with a blower 20. The threshing unit 4 threshs cereals harvested by the harvesting unit 8 while running on the field by the operation unit 14. Then, the waste is discharged outside the machine through the waste chain 10 and the waste cutter 11 of the waste processing unit 9. The cereals are separated into grains and fine dust by the rocking sorter 19, and the grains are stored in the grain tank 17 via the frying cylinder 18 and the fine dust is discharged to the outside via the blower 20. It is trying to discharge.
[0010]
As shown in FIG. 2 and FIG. 3, the cutting unit 8 tilts the left and right drive shaft cases 31L and 31R, which also serve as left and right vertical frames, at the rear end of the lower frame 30 formed in a substantially rectangular frame shape. The cutting part frame 32 is formed upright.
[0011]
Then, four lower support rods 33 are provided at the front end of the lower frame 30 at a predetermined interval so as to protrude forward, and a weed body 34 is attached to the tip of each lower support rod 33, and three planted grains A dredge introduction path 35 is formed.
[0012]
On the upper surface of each lower support rod 33 at the rear of the weed body 34, a raised portion support rod 36 is erected, and the upper end of each raised portion support rod 36 and the upper end portions of the left and right drive shaft cases 31L and 31R. In the meantime, a pull-up portion 39 having a pull-up belt 38 projecting a large number of pull-up tines 37 is installed to be inclined at the front and rear heights, and is raised by the rotation of the pull-up belt 38. Raises the fallen cereals and causes them to rise.
[0013]
In addition, a cutting blade device 40 is arranged on the lower surface of the rear end portion of the lower support rod 33 so as to cut the planted corn straw stock that has moved rearward in the planted corn straw introduction path 35.
[0014]
Behind the pull-up portion 39, left and right lower transfer chains 60L, 60R for transferring the cereals harvested by the cutting blade device 40 to the subsequent feed chain 5 are arranged.
[0015]
The lower left transport chain 60L is configured as follows. That is, the left vertical frame 61L is erected on the left upper surface of the lower frame 30, and the left rotating body support rod refracted into a substantially L shape between the middle portion of the left vertical frame 61L and the left lower support rod 33. 62L is installed, and the rotating body 63 is supported in a suspended state in the middle of the left rotating body support rod 62L. A left front sprocket 64L is formed at the lower outer periphery of the rotating body 63, and the left front sprocket 64L In addition, the lower left transport chain 60L is wound between the left drive sprocket 65L and the tension roller 66, and the left lower transport chain 60L is rotated to the right to move the harvested cereal rice cake diagonally in the upper right direction.
[0016]
The lower right transport chain 60R is configured as follows. That is, the pipe frame 67 is disposed obliquely left rear upper from the lower part on the right front side inside the cutting part 8, and the front end part of the pipe frame 67 is supported by the upper part of the lower support rod 33 on the right side. The midway part is supported by the midway part of the left drive shaft case 31R.
[0017]
In the side view, the pipe frame 67 is refracted in a stepped manner with the front part 67F as the upper stage and the rear part 67R as the lower stage, and in the plan view, it is refracted in a stepped form with the front part on the outside and the rear part on the inside. A right rotating body 63 having a right front sprocket 64R formed on the outer periphery of the front portion 67F is pivotally supported in a suspended state, the right front sprocket 64R, a rear sprocket 68 pivotally supported at the rear end of the pipe frame 67, and a right drive. A lower right transport chain 60R is wound between the sprocket 69 and the tensioner 70, and the left lower transport chain 60R is rotated counterclockwise so as to transfer the harvested cereals diagonally to the left rear upper direction.
[0018]
In addition, a rotating body 63 is also arranged behind the central culm introduction path 35 so that the harvested culm is transferred in the direction of the lower right transport chain 60R by the right rotation of the central rotating body 63. Yes.
[0019]
Therefore, the right and middle reaped grain halves join at a position in front of the middle part of the lower right transport chain 60R, and the left reaped harvest cereals merge at the rear end of the lower right transport chain 60R. It will be delivered to the subsequent feed chain 5.
[0020]
In such a lower right transport chain 60R, in the present invention, the rear portion 67R of the pipe frame 67 is disposed close and parallel to the inner side of the lower right transport chain 60R, and the outer periphery of the rear portion 67R has the outer right surface of the lower right transport chain 60R. The lower transport chain guide 72 extending from the rear end to the junction 71 with the central strip is fixed by welding or the like, and the outer surface of the lower transport chain guide 72 is slidably contacted with the inner surface of the lower right transport chain 60R. Thus, the right and middle strips join together to reliably hold the harvested cereal rice cake whose transport amount has increased.
[0021]
In this way, by directly fixing the lower conveyance chain guide 72 to a part of the pipe frame 67, a member for supporting the lower conveyance chain guide 72 is not required, the number of parts is reduced, and the cutting portion 8 is reduced in weight. be able to.
[0022]
Further, a rear take-up belt pulley 73 is formed on the outer peripheral upper portion of each rotating body 63, and a large number of take-ups on the outer periphery between the front take-up belt pulley 74 pivotally supported in front of each take-up belt pulley 73. A stir belt 76 having a tine projecting is wound around and a star wheel 77 is formed on the outer periphery of the lower end of each rotating body 63. Therefore, the right scraping belt 76 and the star wheel 77 are supported by the pipe frame 67 via the rotating bodies 63.
[0023]
In the figure, 78L and 78R are left and right tension mechanisms, which respectively include left and right tension arms 79 and 80, a tension spring 81, and an adjusting screw 82. In particular, the left tension mechanism 78L includes the left drive sprocket. The lower left transport chain 60L between the 65L and the tension roller 66 is arranged substantially parallel to the left end of the lower right transport chain 60R to form a grain haul transport path R, and on the outer peripheral surface of the left vertical frame 61L. The arm support 83 is fixed, and the base end of the left tension arm 79 is pivotally attached to the pivot 84 provided on the arm support 83. In particular, the position of the pivot 84 is conveyed to the lower right. The rotation path of the tension roller 66 pivotally supported on the tip of the left tension arm 79 is set in the proximity of the vertical line 86 drawn down to the virtual extension line 85 at the left end of the chain 60R. The temporary Substantially have to be parallel to the extended line 85. Therefore, even if the tension roller 66 moves for the tension operation, the lower left transport chain 60L between the left drive sprocket 65L and the tension roller 66 and the lower right transport chain 60R facing this portion are substantially parallel to each other. Thus, the distance between the left and right lower transfer chains 60L and 60R is held substantially constant, and the harvested cereal meal can be securely held.
[0024]
Further, the left tension mechanism 78L is provided with a regulating body 88 having a distal end portion refracted into a substantially L shape to form a latching portion 87, and the latching portion 87 and the left tension arm 79 are brought into contact with each other. The operation on the loose side of the tension roller 66 is restricted to prevent the lower left transport chain 60L from becoming too loose when an abnormality occurs in the tension spring 81 or the adjustment screw 82.
[0025]
In the figure, 89 is a left lower conveyance chain guide, 90 is a left tensioner, 91 is a centrally raised drive shaft case, 92 is a tip tine, 93 is a chain case, 94 is an upper conveyance device, and 95 is a winding prevention cylinder.
[0026]
【The invention's effect】
According to the present invention, the following effects can be obtained.
[0027]
In the invention according to claim 1, in the harvesting part structure of the combine equipped with the lower conveying chain that conveys the stock of the harvested grain straw, the drive sprocket and the tension roller of the lower transportation chain The tension roller is pivotally supported at a position close to the rear part of the cereal conveying path to be conveyed, and the tension roller is movable, and the lower conveying chain between the drive sprocket and the tension roller is substantially parallel to the cereal conveying path. Furthermore, the tension roller can be moved for the tension operation by configuring the tension roller so that it can be moved substantially parallel to the cereal conveying path so that the tension of the lower conveying chain is kept substantially constant. Even so, the change in the distance between the lower conveyance chain and the guide basket provided opposite to this is suppressed, and the gripping force of the harvested grain basket does not change, Dropping or culms by loosening the lifting force, the excess loss of power by the gripping force and lower transport chain such as wear can be prevented.
[0028]
According to a second aspect of the present invention, the tension roller is pivotally supported at the tip end portion of the tension arm, and a pivot is disposed in the vicinity of a perpendicular line extending from the axis of the tension roller to the grain transporting path. Further, by pivotally supporting the base end portion of the tension arm, it is possible to simplify the structure for moving the tension roller substantially parallel to the cereal conveyance path.
[Brief description of the drawings]
FIG. 1 is a side view of a combine equipped with a tension mechanism according to the present invention.
FIG. 2 is a partially cutaway side view of a cutting part.
FIG. 3 is a partially cutaway plan view of a cutting part.
[Explanation of symbols]
A combine R cereal conveyance path 8
60L Lower transfer chain
65L drive sprocket
66 Tension roller
78L tension mechanism
79 Tension arm
86 perpendicular

Claims (2)

In the harvesting part structure of the combine equipped with the lower conveying chain (60L) that conveys the stock of the harvested cereal rice cake,
The drive sprocket (65L) and the tension roller (66) of the lower conveying chain (60L) are pivotally supported in the vicinity of the rear portion of the cereal conveying path (R) for conveying the stock of the harvested cereal , and the tension roller (66) is no freely movable, substantially parallel to the lower conveying chain (60L) the culms conveying path relative to (R) between said drive sprocket (65L) and the tension roller (66), Furthermore, combined, characterized in that the tension roller (66) configured to hold the tension of the lower conveying chain (60L) substantially constant as substantially parallel to movable against the above culms transport path (R) Cutting part structure . The tension roller (66) is pivotally supported on the tip of the tension arm (79), and is pivoted close to the perpendicular (86) lowered from the axial center of the tension roller (66) to the grain transporting path (R). The combine harvester structure according to claim 1, characterized in that (84) is arranged and the proximal end of the tension arm (79) is pivotally supported on the pivot (84).

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