JPH0132842Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reaping machine suitable for use with a small combine harvester for cutting two to three rows.

The structure of the combine harvester differs depending on the number of rows to be harvested. In other words, a two-row reaper is generally equipped with three sowing bodies and two pulling devices, and one row cuts the two-row grain culm between the central sowing body and the outer sowing body. The structure is such that the grass is guided separately and then pulled up and harvested while merging into a single row in the pulling path between the left and right pulling devices. In addition, a reaper for cutting 3 to 4 rows is equipped with four sowing bodies and three pulling devices, and the grain can be guided one row at a time between adjacent sowings or two rows to one of them. After the culms are pulled up and harvested through two rows of lifting passages, they are combined into a single bundle by a conveying device and conveyed.

However, in a reaper that cuts 3 to 4 rows, not only the pulling device but also the conveying device are large and have a complicated structure, and it is not possible to provide this at a low price. It is desirable to be able to mow at least three rows with a small machine. Conventionally, therefore, two rows of grain culms are guided between adjacent sowings on one side of a two-row mower, and one row of grain culms is guided between adjacent sowings on the other side, and these are brought together using a pulling device. Therefore, three-row mowing is carried out using a two-row mower, but in this case, the grain culms in the inner row can be cut by combining the row width of about 1 m at the stock base into one row at the tip. In many cases, the cutting height was uneven between the grain culm and the grain culm in the outer row, and the handover to the conveying device was not carried out smoothly.

Therefore, a small central pulling device is installed in the middle of the pair of left and right outside pulling devices of a two-row mower, and the three rows of grain culms that have been raked by the four tillers are moved between the left and right outside pulling devices and the center. 2- to 3-row reapers are being developed in which one and two rows are guided between a pulling device and used for pulling and reaping.

However, in such a reaper,
A power transmission device to the newly installed central hoisting device must be installed behind the outer hoisting device, and this power transmission device may interfere with harvesting of the grain culm or allow weeds and mud to get between the cutting blade and the mower. Since there is a risk of clogging, this point must be taken into consideration during development.

The present invention was developed in view of the above points, and the central pulling device installed in the middle of the left and right outer pulling devices is connected from the drive side within the transmission box installed in the center of the central branch pipe. is connected to the transmission shaft of the transmission box and driven, and in the space between the transmission box, the joint flange of the grass dividing pipe, and the cutting blade,
By providing a cutting blade guide that is fixed to the joining flange and the grass dividing pipe to block the space, the cutting blade is prevented from becoming clogged with weeds and mud, improving cutting performance, and the compact structure provides the same performance as larger machines. To provide a reaping machine that is capable of performing three-row cutting. Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 4 show an embodiment of a reaping machine according to the present invention, FIG. 1 is a side view showing a reaping machine, a threshing machine, and a part of a traveling part of a combine harvester in which this is implemented, and FIG. 2 3 is a plan view showing the same without the grain culm conveying device, FIG. 3 is a partially cutaway side view showing the vicinity of the conduction box and the cutting blade, and FIG. 4 is an elevational view in the A direction of FIG. 3. In the figure, on the traveling frame connecting the left and right traveling crawlers 2 of the combine 1, there is a threshing frame 3 in which a threshing device and a sorting device are housed, and a threshing frame 3 equipped with a feed chain 4 etc. for conveying grain culms for threshing. A machine 5 is installed, and on the side of its front end is a cockpit 6 where a worker is seated.
An operating device 7 is provided that includes levers for operating the running of the machine and the operation of the reaping and threshing devices.

A reaping frame 9, which supports a raising reaping section of a reaper and is generally designated by reference numeral 8, is swingably supported on a pivot portion of a reaping bearing provided at the upper front end of the threshing frame 3. The reaping frame 9 and the traveling frame are connected by a hydraulic cylinder 10, and by expanding and contracting the hydraulic cylinder 10 by operating from the driver's seat 6, the reaping frame 9 swings and the cutting height is adjusted. The vehicle is configured to avoid collisions with obstacles when driving on the road, etc. Inside the reaping frame 9, there is a transmission shaft 1 which is drivingly connected to the driving side within the reaping bearing.
1 is supported through the shaft, and the reaping frame 9
A reaping gear box 12 is integrally formed at the lower end and perpendicular to the reaping gear box 12 in a T-shape, and a reaping drive shaft 14, which is drivingly connected to the transmission shaft 11 and a bevel gear 13, passes through the inside of the reaping gear box 12. It is pivoted. Further, from both ends of the reaping gear box 12, grass divider stays 15 are provided to protrude diagonally downward, and a grass divider stay 15, generally indicated by reference numeral 16, is supported at the tip thereof. This dividing rod 16 is connected to a front frame 16a parallel to the reaping gearbox 12.
and three weeding pipes 16b to 16d extending forward along the ground are integrally formed in a fork shape, and at the front end of each weeding pipe 16b to 16d, there is a pipe for cutting through the grain culms in the field. Grass branches 17b to 17d leading to the raising passages are respectively attached. Note that the remaining grass dividing pipe 28 and grass dividing body 29 will be described later.

A pair of left and right outer pulling devices 18 and 19 are provided behind the grass dividing bodies 17b to 17d and between the grass dividing pipes 16b and 16c and between 16e and 16d.
The upper end of the reaping gear box 12 is supported by a pulling pipe 20 extending diagonally upward from both ends of the reaping gearbox 12, and the lower end is supported by weeding pipes 16b and 16d, which stand in a slightly inclined shape. They are arranged so that the distance between them becomes narrower as they move upward, forming a V-shape. The lifting chain, which is stretched in the chain case 21 of these outer lifting devices 18 and 19 and runs by the driving connection between the lifting drive shaft 22 in the lifting pipe 20 and the reaping drive shaft 14, includes a large number of Lugs 23 are arranged at regular intervals, and are configured to stand up only at the lower end of the chain case 21 and the inner lifting passageway by the action of a lug guide provided in the chain case 20 and run together with the chain. .

On the other hand, a plurality of cutting blade stays are protruded forward from the front frame 16a of the grass dividing rod 16 in close proximity to the ground, and a cutting blade, generally designated by reference numeral 24, is fixed to this with bolts. It extends in the width direction of the platform. This cutting blade 24 is formed of a large number of triangular blades and is fixed to a cutting blade holder 25, and a fixed blade 26 that is also formed of a large number of triangular blades and slides on the fixed blade 26 in the machine width direction. It is shaped like a clipper with a reciprocating movable blade 27.

The grass dividing pipe 28, which is one of the central grass dividing pipes among the four grass dividing pipes, has a base fixed to the reaping gear box 12 by a flange connection and extends forward. is a branch 29
is installed. In this weeding pipe 28,
A transmission shaft 31 which is drivingly connected to the reaping drive shaft 14 in the reaping gear box 12 through a bevel gear 30 is supported through the reaping gear box 12, and a transmission box 32 and a raking gear box are installed in the central bent part and the inclined part behind it. 33 are provided. Among these, the conduction box 32 is formed into a substantially triangular shape when viewed from the side, and each member 28a, 28b of the branching pipe 28 divided in the axial direction is joined by a flange 32a and screwed into a screw hole 32b. are connected by. Then, the flange 32a and the weeding pipe 28
In the space surrounded by the rear member 28a and the cutting blade 24, there is a cutting blade guide 33 formed in a triangular plate shape that blocks this space.
and the rear member 28a of the grass dividing pipe 28 by welding.

Further, a conduction pipe 34 extending upward is flange-jointed to the conduction box 32, and a conduction shaft 35 penetrating through the conduction pipe 34 is supported by a flange.
It is drivingly connected to a transmission shaft 31 in the weeding pipe 28 by a bevel gear 36 provided in the transmission box 32. What is designated as a whole by the reference numeral 37 is a central pulling device that is installed parallel to the left and right outer pulling devices 18 and 19 in the middle thereof, and is connected to the conduction pipe 34 via a gear box 38 at its upper end. The lower end is supported by a weeding pipe 28. This central pulling device 37
is equipped with a lifting chain running in a chain case 39 that is shorter and smaller than the outer lifting devices 18, 19, and this lifting chain is drivingly connected to the transmission shaft 35 by a bevel gear 40 in a gearbox 38. ing. A large number of lugs 41 are arranged at regular intervals on the lifting chain, and the lower end of the chain case 39 and one of the outer lifting devices 18
It is configured to stand up and run only on the side.

On the other hand, the scraping gear box 33 is provided to protrude obliquely upward, and a scraping drive shaft 44, which is drivingly connected to the transmission shaft 31 by a worm 42 and a worm wheel 43, is pivotally supported. ,Also,
A non-driven scraping shaft 45 is provided at a position symmetrical to the scraping drive shaft 44 with respect to the center of the machine. Both shafts 44 and 45 are provided with a scraping belt 46 having lugs and forming a V-shape, and a rotating gear-shaped scraping body 4.
The sprocket on the raking drive shaft 44 and the reaping gear box 12 are connected to each other.
A conveyance chain 49 is stretched between it and a sprocket 48 provided on the side. Note that the reference numeral 50 is a drive device for the cutting blade 24, and the reference numeral 5 is a drive device for the cutting blade 24.
All items indicated by 1 are grain culm guides.

Further, from a support rod projecting diagonally upward from a reaping bearing that pivotally supports the reaping frame 9, a tip conveying device 52 that conveys the tip of the harvested grain culm and a root conveying device 53 that conveys the root portion of the harvested grain culm are connected. are mounted vertically in parallel and diagonally downward, and are driven from the drive shaft side in the reaping drive bearing via the transmission shaft in the support rod.

The operation of the reaping machine 8 configured as described above is performed in 3 steps.
This will be explained using row cutting as an example. As the machine moves forward, the row of grain culms in the field is divided into four divisions 16b to 1.
6d and 29 and are guided one by one into three rows of passages between adjacent grass divisions, two of which have an outer pulling device 18 and a central pulling device 37 in the passage. Since the starting end is facing forward, the tip of the ear can be scooped up by the lugs 23 and 41 that rotate while standing up. The tips of the grain culms that have been scooped up are lifted up and conveyed by the lugs 23 and 41 as the machine advances, and the root portions of the grain culms are conveyed to the cutting position by the raking belt 46 and moved to the cutting blade. Reaped in 24. The harvested grain culm is
The root portion is scraped by the rotary scraper 47 and conveyed by the conveyance chain 49, and the tip portion is lifted up and released from the devices 18, 19, 37, and the tip and root portions are transferred to the tip and root conveying device 52. , 53 and transported. The conveyed grain culms have their roots taken over by the feed chain 4, and while being conveyed, the tips of the grains are handled and threshed with a barrel.

Of the operations of the reaper 8 as described above, the operation of reaping grain culms will be described in more detail. Each of the three grain culms guided between adjacent sowing plants is moved by the grain culm guide 51 as the reaper advances. The cutting position by the cutting blade 24 is reached along the line. Of these, 16 grass pipes
The grain culm between d and 28 reaches the cutting blade 24 and is cut while the root portion is removed laterally by the conduction box 32. There is a cutting blade guide 33 in the passage of this grain culm.
is provided to block off the space, so that straw debris generated during the transportation of grain culms and weeds growing in the field will not clog the space in front of the cutting blade 24 or above the cutting blade 24. Also, mud from the field won't get stuck in these areas.

As is clear from the above explanation, according to the present invention, in a reaper, the central pulling device installed in the middle of the left and right outer pulling devices is connected to the drive side in the transmission box installed in the center of the central weeding pipe. A mower is connected to and driven by a transmission shaft from above, and is installed in a space between the transmission box, the joint flange of the grass dividing pipe, and the cutting blade, and is fixed to the joint flange and the grass dividing pipe to block the space. By providing a blade guide, straw waste generated during transportation and weeds growing in the field will not get clogged near the cutting blade, and mud from the field will not accumulate on the cutting blade, making it easier to transport grain culms. Reaping is carried out smoothly, the sharpness of the cutting blade is ensured, conveyance and reaping performance are significantly improved, and the strength of the joint between the grass dividing pipe and the transmission box is increased. In this way, the provision of a central pulling device eliminates obstacles during transportation and harvesting, and allows a small machine to perform three-row mowing with almost the same performance as a large machine, reducing equipment costs and reducing harvest costs. can be significantly reduced.

[Brief explanation of the drawing]

1 to 4 show an embodiment of a reaping machine according to the present invention, FIG. 1 is a side view showing a reaping machine, a threshing machine, and a part of a traveling part of a combine harvester in which this is implemented, and FIG. 2 3 is a plan view showing the same without the grain culm conveying device, FIG. 3 is a partially cutaway side view showing the vicinity of the conduction box and the cutting blade, and FIG. 4 is an elevational view in the A direction of FIG. 3. 8... Reaping machine, 12... Reaping gear box, 1
8, 19...Outside pulling device, 24...Mowing blade, 2
8... Grass splitting pipe, 29... Grass splitting body, 31... Transmission shaft, 32... Transmission box, 32a... Flange, 33... Cutting blade guide, 37... Central pulling device.

Claims (1)

[Scope of utility model registration request] A pair of outer lifting devices located on the outside in the cutting width direction and erecting the lugs inward; and a pair of outer lifting devices located between these outer lifting devices and erecting the lugs facing the lugs of the one outer lifting device. On the lug-raising side of the central pulling device, the two rows of grain culm are pulled up in cooperation with the outer lifting device on this side, and on the non-lug-raising side of the central pulling device, this In a reaping machine that pulls up one grain culm with a side outer pulling device, the central pulling device is
A transmission box is integrally provided with a flange connected to the central part of the central weeding pipe, and is connected to the transmission shaft from the driving side, and is installed in the space between the flange and the grain culm reaping cutting blade. A reaping machine characterized in that a cutting blade guide is provided that is fixed to the flange and the grass dividing pipe to block off the space.