JP2003052222A - Combine harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combine harvester with which stems and culms on ridge edges can be reaped at a conventional height. SOLUTION: This combine harvester is provided with a raising up part 9 for raising up stems and culms, a reaping blade part 12 for cutting the root of the raised up stems and culms and a pre-treating conveying part 13 for conveying the reaped stems and culms toward a threshing part 3 in a pre- treating part 2 liftably connected to the front of the machine body. In the combine harvester, the raising-up part 9 and a grass-dividing part 8 are constituted so as to enable vertical movement to a pre-treating part body 2a equipped with the reaping blade part 12 and the pre-treating conveying part 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to a technical field of a combine having a pretreatment section for cutting stems at a front portion of a traveling machine body.

[0002]

2. Description of the Related Art Generally, a pretreatment unit for cutting stalks is provided at a front portion of a combine body so as to be vertically movable. The pretreatment part is a raising part (including a divider) that causes stem culms.
And, a cutting blade portion for cutting the root of the stem that has been raised, and a conveying portion that conveys the cut stems toward the threshing portion. Is also located behind.

[0003]

In the combine as described above, when attempting to mow the stem culm on the edge of the ridge while facing the ridge, the cutting blade is inevitably left uncut due to the arrangement of the cutting blade. Therefore, conventionally, the stem culm at the edge of the ridge is hand-cut, and there is a disadvantage that working efficiency is reduced. There is also a method to raise the pretreatment section higher than the ridges and forcibly stalk the culm at the edge of the ridge, but in this case, culm spills occur in the culm conveying route and are left untreated in the threshing section. There was an inconvenience such as occurrence of.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances in order to solve these problems, and is a pretreatment unit which is vertically movable with a front portion of an airframe. In a combine comprising a raising section for raising stems, a cutting blade section for cutting the root of the stems that have been raised, and a conveying section for conveying the cut stems toward the threshing section,
It is characterized in that the raising section is configured to be vertically movable with respect to a pretreatment section main body including a cutting blade section and a transport section. In other words, by raising the raising part with respect to the main body of the pretreatment part, it becomes possible to mow the stem culm at the edge of the ridge at a normal cutting height, and as a result, when manually cutting the culm at the edge of the ridge. In addition to improving working efficiency, it is possible to eliminate the inconvenience of spillage and unhandled areas, such as when the stem culm at the edge of the ridge is forcibly overcut. Further, even during normal mowing, the vertical position of the raising portion can be adjusted according to the culm length, which is advantageous in that it is also possible to mow extremely long culms. Further, the raising portion is arranged in a rearwardly inclined shape and is supported so as to be vertically movable along the inclination. In this case, it is possible to simplify the support structure of the raising portion and the transmission structure for the raising portion. Further, the pull-up drive shaft provided on the pretreatment section main body side is arranged along the vertical movement direction of the pull-up section, and the input gear provided on the pull-up section side is integrally rotatable with respect to the pull-up drive shaft. And is connected so as to be slidable in the axial direction. In this case, it is possible to always drive the raising portion irrespective of the vertical movement of the raising portion, and as a result, avoid the inconvenience of stopping the movement of the raising portion and obstructing the cutting of stems. be able to.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Next, one of the embodiments of the present invention will be described with reference to the drawings. In the drawings, 1 is a combine, and the combine 1 comprises a pretreatment section 2 for cutting stems, a threshing section 3 for threshing cut stems, and a threshing section 3 for selecting threshed grains. A grain tank 4 for storing the finished grains, and a post-processing unit 5 for discharging the culms that have been threshed,
An operating section 6 in which various operating tools are arranged and a crawler type traveling section 7 are provided.

The pretreatment section 2 has a weeding section 8 for weeding uncut stems and a raising section 9 for raising the ear side of the weeded stems.
And the stock side scraping part 10 that scrapes the stock side of the culm that has been sown.
And an ear side scratching portion 11 that scrapes the ear side of the stalk that has been weeded,
The cutting blade unit 12 cuts the root portion of the stalks to be scraped, and the pretreatment transport unit 13 that transports the cut stalks toward the threshing unit 3. The pretreatment transport unit 13 The cut stalks that have been conveyed to the terminal end are supplied to the threshing unit 3 via the handling depth transport unit 14 having a handling depth adjusting function.

The pretreatment frame 15 which constitutes the pretreatment section 2 is movably connected to the front portion of the machine body and is moved up and down by a telescopic operation of a lift cylinder (not shown). The pre-processing frame 15 is a horizontal frame 16 that faces the left-right direction.
And a plurality of vertical frames 17 extending forward from the horizontal frame 16, and a divider 8a forming the weed section 8 is provided at the tip of each vertical frame 17. Further, at a position near the rear of the weeding portion of the vertical frame 17, a pull-up support frame 18 that supports the lower end of the pull-up portion 9
Further, a cutting blade bracket 19 that supports the cutting blade portion 12 is provided at a position behind the vertical support frame of the vertical support frame 17.

The vertical frame 17 is divided between the raising support frame 18 and the cutting blade bracket 19. The plurality of divided front vertical frames 17a are integrally connected via a connecting frame (not shown) arranged so as not to prevent the introduction of stem culms. On the other hand, a semi-cylindrical U-shaped frame 20 formed in a U-shape when viewed from the front is integrally welded to the front end of the divided rear vertical frame 17b. The U-shaped frame 20 is fitted to the rear end of the front vertical frame 17a so as to receive it from below.
In normal times, the front vertical frame 17a and the rear vertical frame 17b are moved up and down integrally with each other in accordance with the expansion and contraction operation of the lift cylinder.

The raising portion 9 includes a raising case 21 which is vertically erected on the front vertical frame 17a, and a raising case 2.
1, sprockets 22 and 23 installed above and below 1, a chain 24 suspended by the sprockets 22 and 23, and a pull-up claw 25 provided at a predetermined interval on the chain 24.
The power is input from an input case 26 that is integrally provided on the rear surface on the upper end side of the raising case 21.

In the pretreatment section 2, the cutting blade section 12 and the pretreatment transfer section 13 are provided, that is, the pretreatment section main body 2
On the a side, a transmission case 27 that distributes the power transmitted from the machine side to each part of the pretreatment unit 2 in a distributed manner is provided in the left-right direction. On the transmission case 27, a plurality of cylindrical cases 28 extending upward and upward are integrally provided upright at predetermined intervals in the left-right direction. The cylindrical case 28 has a transmission shaft 29 rotatably mounted therein, and a pull-up drive case 30 integrally provided at the tip of the case. The front end surface of the pull-up drive case 30 is along the back surface of the pull-up portion 9, and guides the vertical movement of the pull-up portion 9 along the inclination angle thereof in sliding contact. The pull-up drive case 30 includes a pull-up drive shaft 31 having a non-circular cross section (hexagonal shaft or the like).
Is rotatably provided, and the fixed bevel gear 32a,
The pull-up drive shaft 31 is rotationally driven by the power transmitted from the transmission shaft 29 via 32b. The pull-up drive shaft 31 is arranged along the vertical movement direction of the pull-up portion 9, extends upward, penetrates the input case 26 of the pull-up portion 9, and supports the input case 26 slidably in the vertical direction. A second input gear (fixed bevel gear) 33 a is provided in the input case 26.
A first input gear (movable bevel gear) 34 for inputting power to the raising portion 9 via the input shaft 33b is rotatably supported. The first input gear 34 is connected to the pulling drive shaft 31 so as to be integrally rotatable and axially slidable. As a result, the power of the pull-up drive shaft 31 is transmitted to the first input gear 34 regardless of the vertical movement of the pull-up portion 9.

A raising / lowering cylinder 35, which is a hydraulic cylinder, is provided between the lower end of the raising / lowering drive case 30 and the intermediate portion of the rear surface of the raising portion 9. The raising / lowering cylinder 35 causes the raising / lowering portion 9, the grass portion 8 and the front vertical frame portion 17a to move up and down integrally with respect to the raising drive case 30 (pretreatment portion main body 2a) by expansion and contraction thereof. As a result, as shown in FIG. 6, the raising section 9 and the weeding section 8 can be raised without changing the height of the pretreatment section main body 2a, and the stem culm at the edge of the ridge can be cut at a normal cutting height. become.
Further, the raising portion 9, the weeding portion 8 and the front vertical frame portion 17a that are integrally formed are suspended by the raising driving case 30 via the raising and lowering cylinder 35, and the forward and backward and left and right movements are driven to raise. Since it is regulated by the shaft 31 and is slidably guided by the front end surface of the pull-up drive case 30, it is possible to smoothly move up and down.

In the operation section 6, a multi-steering lever 37 is provided in front of the driver's seat 36, which serves as both a steering operation tool and a pre-treatment lifting operation tool. The multi-steering lever 37 can correct the orientation of the machine body based on the operation in the left-right direction, and can raise and lower the preprocessing unit 2 based on the operation in the front-back direction. The grip portion 37a of the multi-steering lever 37 is provided with a plurality of operation switches 38a to 38d.
The operation switch 38a provided on the upper side is used as a reduction operation switch of the raising and lowering cylinder 35, that is, as a raising switch of the raising portion 9 and the weeding portion 8, and the operation switch 38b provided on the lower side is the raising and lowering cylinder. Three
5 is used as an extension operation switch, that is, as a lowering switch for the raising section 9 and the weeding section 8.

In the construction as described above, in the pretreatment section 2 which is vertically movable to the front part of the machine body, the raising section 9 for raising the stem culm and the mowing for cutting off the stem base of the raised stem culm are provided. In a combine 1 comprising a blade portion 12 and a pretreatment conveying portion 13 that conveys the cut culm toward the threshing portion 3, the raising portion 9 and the weeding portion 8 are connected to the cutting blade portion 12 and the pretreatment conveying portion. Since it is configured to be movable up and down with respect to the pretreatment unit main body 2a provided with 13, it becomes possible to mow the stem culm at the edge of the ridge at a normal cutting height while avoiding contact with the ridge, and as a result, the ridge. Work efficiency is improved compared to hand cutting of the culm at the edge, and the inconvenience of culm spillage and leftover handling is eliminated when the stem culm at the edge of the ridge is forcibly high-cut. can do. Also, even during normal mowing,
Since the vertical position of the raising portion 9 can be adjusted according to the culm length, there is an advantage that it can cope with cutting of extremely long culms.

Further, since the raising portion 9 is arranged in a rearwardly inclined shape and is supported so as to be vertically movable along the inclination, the supporting structure of the raising portion 9 and the transmission structure for the raising portion 9 are simplified. can do.

Further, the pull-up drive shaft 31 provided on the side of the pretreatment section main body 2a is arranged along the vertical movement direction of the pull-up section 9, and the first input gear 3 provided on the pull-up section 9 side.
4 can be integrally rotated with respect to the pulling drive shaft 31,
In addition, since it is connected so as to be slidable in the axial direction, it is possible to constantly drive the raising portion 9 regardless of the vertical movement of the raising portion 9, and as a result, the movement of the raising portion 9 is stopped and the stem culm is cut. Inconveniences such as obstruction can be avoided.

[Brief description of drawings]

FIG. 1 is a perspective view of a combine.

FIG. 2 is a schematic side view of a pretreatment unit.

FIG. 3 is a cross-sectional view of an essential part showing a U-shaped frame.

FIG. 4 is a side view showing a transmission structure of a raising portion.

FIG. 5 is a perspective view of an operation unit.

FIG. 6 is a side view of the pretreatment unit showing a raised portion rising state.

[Explanation of symbols]

1 combine 2 Pretreatment section 2a Pretreatment unit body 8a divider 8 grass section 9 Raising part 10 Stock side scraping section 11 Ear side scraping part 12 Cutting blade 13 Pretreatment transport section 17a Front vertical frame 17b Rear vertical frame 20 U frame 26 input cases 30 Lifting drive case 31 Lifting drive shaft 34 First input gear 35 Lifting / lifting cylinder

Claims (3)

[Claims] 1. A pretreatment unit connected to a front portion of an airframe so as to be able to move up and down, a raising unit that raises a stem culm, a cutting blade unit that cuts a root of the raised stem culm, and a cut stem culm. A combiner comprising a transporting unit for transporting toward a threshing unit, wherein the raising unit is configured to be vertically movable with respect to a pretreatment unit main body including a cutting blade unit and a transporting unit. 2. The combine according to claim 1, wherein the raising portion is arranged in a rearwardly inclined shape and is supported so as to be vertically movable along the inclination. 3. The pull-up drive shaft, which is provided on the pretreatment section main body side, is arranged along the vertical movement direction of the pull-up section, and the input gear provided on the pull-up section side is the above-mentioned. A combine characterized in that the combine drive is connected to the pull-up drive shaft so as to be integrally rotatable and slidable in the axial direction.