JPH0520129Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a reaping section lifting device of a combine harvester.

(b) Conventional technology Conventionally, the reaping section elevating mechanism for adjusting the reaping height of a combine has the upper part of the reaping section frame rotatably supported on a support shaft installed horizontally at the upper part of the front end of the machine. This was done by raising and lowering the reaping section around the above-mentioned support shaft using an operating mechanism such as a hydraulic cylinder from the rear and lower side.

(c) Problems to be solved by the invention However, there are very wet fields where the running gear of combine harvesters sinks significantly, and those with such super wet field specifications are installed with the running gear lowered by an amount commensurate with the amount of sinking. When in the sunken state, the posture of the reaping section and the transfer of the harvested grain culm from the reaping section side conveying device to the main body side conveying device are configured to be optimal.

When such a combine harvester for ultra-humid fields is used in standard fields, the reaping section is used in the lowest possible position, but with the conventional structure, the posture of the reaping section changes greatly, and the reaping angle of the cutting blade and the above-mentioned transfer section are The problem was that the angle and spacing between the two would change, making the operation unstable.

(d) Means for solving the problem In this invention, a support shaft is mounted horizontally on the upper front end of the combine harvester, and the middle part of the lift lever is pivoted to the support shaft, and one end of the lift lever and the reaping part frame are connected to each other. The upper part of the reaping part frame is connected to the upper part of the reaping part frame so that the reaping part frame can freely rotate around the spindle, and the hydraulic cylinder is interposed between the lower part of the reaping part frame and the fuselage frame of the combine, and the other end of the lifting lever. It is an object of the present invention to provide a reaping section elevating device for a combine, characterized in that the reaping section is configured to be able to move substantially parallel in the vertical direction by an elevating hydraulic cylinder interposed between the lower part of the reaping section frame and the reaping section frame. .

(e) Effect In this invention, the above structure allows the reaping section to perform vertical movement in substantially parallel movement with the transfer section of the transfer device on the main body side.Therefore, there is little change in the posture of the reaping section, and It is possible to switch between the ultra-wet rice field specification and the standard rice field specification while maintaining the optimum reaping angle and the angle and spacing of the transfer section.

(F) Effects According to this invention, by configuring the reaping part lifting device of the combine as described above, it is possible to use a combine harvester designed for ultra-humid fields in standard fields while maintaining the optimum conditions, and one unit can be used in standard fields. With this combine harvester, it is possible to work in both ultra-wet fields and standard fields under optimal conditions.

Furthermore, when removing the reaping section from the machine body, the two can be easily separated by simply removing the support shaft and the hydraulic cylinder interposed between the reaping section frame and the machine frame. Easy to repair and maintain.

In addition, the mounting structure of the hydraulic cylinder that rotates the reaping section frame is simple, and the base of the lifting hydraulic cylinder is directly connected to the lower side of the reaping section frame, so there is no need for a member to attach the lifting hydraulic cylinder. is unnecessary, and the structure as a whole is simple.

(G) Example The example of the present invention will be explained in detail based on the drawings.
A indicates a combine harvester, and crawler type traveling device 1
The machine body 2 is placed above the machine body 2, and the grain culms harvested by the reaping section 3 connected to the front of the machine body 2 are transported rearward and upward by the vertical conveyance device 4 arranged on the left side of the machine body 2. 2
The threshing section 6 is delivered to the feed chain 5 as a machine side conveyance device arranged on the left side of the machine body 2 near the left side of the
The grains are threshed in the machine, the grains are sorted in the sorting section, and stored in a grain tank 7 on the upper part of the machine body 2, and the waste culm after threshing is discharged from the rear part of the machine body 2.

A support shaft 8 is horizontally mounted on the upper front end of the body 2, and an intermediate portion 9C of a lift lever 9 is rotatably pivoted to the same shaft 8, and the front end 9-1 of the lever 9 is used for driving the cutting blade. The proximal end of a reaping section frame 10, which also serves as a shaft case, is rotatably supported.

Further, the reaping section frame 10 extends diagonally forward and downward, and an expected frame 11 is connected to the lower end thereof to support the lower part of the reaping section 3.

In addition, diagonally forward and upward from the base end of the same frame 10,
An upper frame 13 that also serves as a shaft case for driving the lifting mechanism 12 extends, and supports the upper part of the reaping section 3.

In addition, the lower rear surface of the reaping section frame 10 and the fuselage 2
A hydraulic cylinder 15 is interposed between the front end of the body frame 14 which is integrated with the cylinder 15, and one end 9A which is the front half of the lift lever 9, and a four-section link between the reaping part frame 10 and the body 2. Therefore, each part of the reaping part 3 is configured to be movable substantially in parallel with the same radius as the rotation locus r of the front end 9-1 of the lifting lever 9.

Then, the rear end 9- of the other end 9B side of the elevating lever 9
2 and the lower rear surface of the reaping section frame 10, an elevating hydraulic cylinder 16 is interposed between the reaping section frame 10 and the lower rear surface of the reaping section frame 10, and the extending operation of the cylinder 16 rotates the elevating lever 9 front end 9-1 downward to move the reaping section 3 to the low position L. In other words, the standard field specification is adopted, and the reaping part 3 is
is used at high position H, that is, in extremely wet fields. Compared to the rotation radius r of the front end of the lift lever 9-1,
Since the distance between the front end 9-1 and the pivot point of the reaping section frame 10 of the hydraulic cylinder 15 and the length of the cylinder 15 are sufficiently large, the raising and lowering of the reaping section 3 is performed by approximately parallel movement as described above. Therefore, the change in the front and rear tilted posture of the reaping section 3 is slight, and there is no problem in practical use.

Note that FIG. 4 is an explanatory diagram of the elevating operation of the reaping section, in which the elevating lever 9 and the base end 1 of the hydraulic cylinder 15
5-1 is rotatably attached to the fuselage 2, and includes the front end 9-1 of the lift lever and the tip 15 of the hydraulic cylinder 15.
-2 is also rotatably pivoted to the reaping part frame 10 to form a quadrilateral link mechanism, and the quadrilateral link mechanism is formed by changing and fixing the intersecting angle of two adjacent sides. Therefore, the relative position of each side of the link mechanism can be changed and fixed. Therefore, in the present invention, the intersection angle between one end 9A of the lifting lever 9 and the reaping section frame 10 is
The reaping section is moved up and down by extending, contracting and fixing an elevating hydraulic cylinder 16 interposed between the other end 9B of the lever 10 and the reaping section frame 10.

That is, the contraction 16' of the lifting hydraulic cylinder 16
As a result, both ends 16-1 and 9-2 of the cylinder 16 move to 16-1' and 9-2', respectively, and as a result, the front end 9-1 of the lifting lever 9 moves to 9-1' and the reaping section frame is moved. 10 to the 10' position, that is, the H position.

In addition, the delivery part of the feed chain 5 on the machine body 2 side, that is, the front end of the chain 5 is inclined diagonally forward and downward, and is slightly angled with the rear end of the vertical conveyance device 4 of the reaping section 3. They wrap in an intersecting state, and the harvested grain culm is delivered at this wrap portion N. However, each part of the reaping section 3 draws a circular trajectory due to the above structure, and as a result, it is possible to reach the high position H.
and low position L are vertical conveyance device 4 on the same trajectory.
, and the amount of lateral movement d of the vertical conveying device 4 between the two positions H and L is small, and the grain culm is transported under approximately the same optimal conditions at both positions H and L. The delivery will take place.

The power is transmitted to the reaping section 3 from a driving pulley M-1 provided on the transmission M on the machine body 2 side via a belt M-2 to a driven pulley disposed coaxially with the spindle 8 on the reaping section 3. It is configured to transmit power to M-3 and to the reaping section 3 via gearbox M-4. E indicates the prime mover.

In addition, the reaping part 3 can also be raised and lowered by extending and contracting the hydraulic cylinder 15 in the same manner as in the conventional structure, and in the present invention, it is mainly used for fine adjustment of the reaping height.

Therefore, the change in posture in the conventional structure is eliminated by the present invention, and one combine harvester can be used for both super-wet field specifications and standard field specifications.

In addition, the lifting hydraulic cylinder 16 and the lifting lever 9
It is also possible to provide the cylinders on the left and right sides of the machine body so that each cylinder can be expanded and contracted individually to cause the reaping section to roll.

[Brief explanation of drawings]

FIG. 1 is a side view of the main parts of the proposed device. Figure 2 shows
An explanatory diagram showing the principle of operation. FIG. 3 is an overall side view of a combine harvester equipped with the device of the present invention. FIG. 4 is an explanatory diagram of the same. FIG. 5 is a power transmission system diagram to the reaping section. A... Combine harvester, 2... Body, 3... Reaping section, 8... Support shaft, 9... Elevating lever, 9A... One end, 9B... Other end, 10... Reaping section frame, 1
4... Airframe frame, 15... Hydraulic cylinder, 1
6... Lifting hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] A support shaft 8 is horizontally mounted on the upper front end of the fuselage 2 of the combine harvester A, an intermediate portion 9C of a lift lever 9 is pivotally connected to the support shaft 8, and one end 9A of the lift lever 9 is connected to the upper part of the reaping section frame 10. The reaping section frame 10 is rotatable around the support shaft 8, and the lower section of the reaping section frame 10 and the body frame 14 of the combine A are connected to each other.
The reaping section 3 can be moved substantially in parallel in the vertical direction by a hydraulic cylinder 15 interposed between the lifting lever 9 and the lifting hydraulic cylinder 16 interposed between the other end 9B of the lifting lever 9 and the lower part of the reaping section frame 10. A reaping section elevating device for a combine harvester, characterized in that it is configured as follows.