JPH0137383Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a grain culm raking device for raking harvested grain culms in a harvester such as a combine harvester through a plurality of raking passages, merging them together, and then transporting the harvested grain culms.

(b) Prior art Conventionally, four raking wheels are pivotally supported at regular intervals on the upper part of the cutting blade, and they are meshed sequentially to form a pair of left and right raking passages, and the rear part of these raking passages is shaped like a human character. A harvesting machine that is joined to a mold, and a raking wheel is pivotally supported between the front parts of a pair of left and right conveyor chains with lugs, and the upper part of one side of this raking wheel is covered with a grain culm guide. Already known.

(c) Problems to be solved by the invention In the former known harvester, the spacing between the raking wheels is the same in the area where no raking path is formed and the area where a raking path is formed. As a result, there were problems in that the width of the machine became wider, problems in that the grain culm was caught in the meshing part that did not form a raking passage, and problems in that the grain culm was caught in the meshing part that did not rake the grain culm in the middle. Although the teeth are not sandwiched, they have a wide meshing gap, resulting in extremely large crushing, which causes uneven wear on the tooth surfaces.

In addition, the latter can only have one raking passage that rakes the grain culm from both the left and right sides, and if the raking device has two transmission systems and a raking passage is installed from the left and right. However, the culm guide had to be provided separately for each scraping passage, resulting in problems such as an increase in the number of parts and the number of assembly steps.

(d) Means for solving the problem The present invention provides at least two pairs of left and right star foil-shaped raking wheels for raking the harvested grain culm on the upper part of the cutting blade, which are sequentially meshed and disposed in series. In a harvesting machine configured with a pair of left and right raking passages, in which the grain culms raked from these raking passages are merged and conveyed, only the raking ring at one end of the raking wheels is used. The pair of raking wheels that are forcibly driven and form the raking passage are shallowly engaged with each other with a grain culm clamping interval apart, and the raking wheel that is located in the middle and does not form the raking passage has a minute meshing gap. The distance between the axes of both scraping wheels is narrower than that of other parts, and the deeply engaged parts of these scraping wheels are covered with a guide case, and the front part of this guide case is The protrusions are passed between the raking wheels to cover the part where they rotate forward, and approximately the entire length of the protrusions that move laterally protrudes, so that the rear part is a grain culm raking passage from both sides of the front part. The above-mentioned problems were solved by following the above.

(E) Effect Grain culms that have been divided by the tiller and raised by the grain culm pulling device are raked into the raking passage formed by the shallow meshing portions of the raking wheels by at least two pairs of right and left raking wheels; The grain culm scraped from the scraping passage is laterally conveyed to the other side by the horizontal conveyance passage and joins the grain culm scraped from the other scraping passage.

The area between the left and right raking passages that is deeply engaged and does not rak the grain culm is covered with a guide case, so the grain culm is not pinched from above or from behind. The front part of the guide case receives the grain culm that is about to enter there, and the protrusions of the left and right raking wheels protrude to move the grain culm to the raking passages on both sides and rak it rearward. .

In addition, the grain culm that has been shoved into one of the scooping passages is
The grain culms are laterally conveyed to the other side by the lateral conveyance passage, and at that time, the rear part of the guide case guides the grain culms laterally and prevents them from falling forward, and the grain culms are raked from the other culm raking passage on the other side. It merges with the grain culm.

During this raking process, the part where the raking wheels are deeply engaged and does not form a raking path is covered by the guide case, so grain culms cannot enter into that area from above or from behind. Never get caught.

(f) Example An example of the present invention will be explained with reference to the drawings.
Reference numeral 1 denotes a cutting blade installed at the front of the combine, and a cutting blade 2 is provided at the center and both sides of the cutting blade in front of the cutting blade, and two pairs of grain culm pulling bodies are installed immediately behind the cutting blade 2. 3... is placed in an upright position leaning backwards.

Reference numeral 4 denotes an intermediate grass cutting body provided from the middle part of the pair of grain culm raising bodies 3 to just above the cutting blade 1.

Each grain culm triggering body 3 above the cutting blade 1...
Behind..., there are two pairs of four star foil-shaped scraping wheels 5, which are arranged horizontally in a row and mesh with each other, and each is rotatably supported on a shaft. 2, which forms a pair on the left side with the ring 5, 5
The two raking wheels 5, 5 are shallowly engaged with each other with a grain culm nipping interval in between, and the grain culm nipping interval constitutes raking passages A, B, respectively.

Further, the distance b between the axes of the scraping wheels 5, 5 in the intermediate portion where no scraping passages are formed is such that the scraping wheels 5, 5 forming the scraping passages A, B are in a pair. 5
The distance between the axes a and c is smaller than that of the two axes, and the teeth are meshed with each other with a minute gap.

Furthermore, sprockets 6a and 6b are pivotally attached to the upper parts of the scraping wheels 5 and 5 on both sides, respectively, and vertical sprockets 7a and 7b are provided between these sprockets 6a and 6b and sprockets 7a and 7b provided from the center behind them, respectively. The conveyor chains 8a and 8b are stretched, and another sprocket is attached to the shaft of the sprocket 7a, around which the rear part of the vertical conveyor chain 8a on the left side when viewed from the front is wrapped, and this sprocket and the vertical conveyor chain 8b on the other side are connected. Sprocket located further back (not shown)
A horizontal conveyance chain 9 is stretched between the two, and since the horizontal conveyance chain 9 is forcibly driven, the sprocket 6a in front of it is connected via the left vertical conveyance chain 8a.
and the scraping wheel 5 below it is driven, whereby the scraping wheel 5 on the right side thereof is sequentially rotated,
As the rightmost scraping wheel 5 rotates, a sprocket 6b coaxially fixed therewith and a vertical conveyance chain 8b wound around it also rotate.

Then, when the combine harvester enters the erected grain culm, the weeding body 2 ... transfers the weeded grain culm to the grain culm raising body 3.
... is raised, and the intermediate weeding bodies 4, 4 further divide the plant base and guide it to the front part of the raking passages A, B, and the cutting blade 1 cuts it, and the stock base of the grain culm is cut. At the same time, the vertical conveyance chains 8a, 8b on both sides are raked into the respective raking passages A, B by the two pairs of raking wheels 5...
and the guide case 10 located in between. In addition, the stems are connected to vertical conveyance chains 8a and 8.
It is sent rearward by a conveyor belt (not shown) with lugs provided at the upper part of b.

The grain culms fed in this way are transported laterally by the horizontal transport chain 9 and the stem horizontal transport belt provided above it, and merge together, and are transported backward by a transporter that also controls the handling depth. The grain is supplied to a self-thresholding type threshing device installed on the machine stand.

As mentioned above, in the present invention, at least two pairs of left and right star foil-shaped raking wheels for raking the harvested grain culm are sequentially meshed with each other in the upper part of the cutting blade to form at least one pair of left and right raking channels. In a harvester configured to combine and convey grain culms scraped from these scraping passages, only the scraping wheel at one end of the scraping wheels is forcibly driven, and the scraping The pair of scraping wheels that form a passage are shallowly engaged with each other with a grain culm clamping interval apart, and the intermediate scraping ring that does not form a scraping passage is deeply engaged so that the engagement gap is minute. The distance between the axes of the raking wheels is narrower than that of other parts, and the deeply engaged parts of these raking wheels are covered with a guide case, and the front part of this guide case is made to extend between both raking wheels. The protrusions covered the forward rotational portion, and approximately the entire length of the transverse protrusions was made to protrude, and the rear part was aligned with the grain culm raking passage than the front both sides, so that each There is no need for a complicated transmission device to forcibly drive each raking wheel, and the cost and weight can be significantly reduced, and there is no clogging of weeds, straw, etc., and no obstruction to the transportation of grain culms. .

Moreover, the engagement of the raking wheels in the raking passage is such that power can be transmitted while pinching and raking the grain culm, but the engagement of the raking wheels in the middle part of the left and right raking passages is tight with a minute gap. When the teeth of one scraping wheel are in mesh with each other, the tips of the teeth of one scraping wheel strongly press against or collide with the tooth surfaces of the teeth of the other scraping wheel, causing rapid wear and damage to the tooth surfaces, teeth, and tips. In addition, noise and vibration can be prevented because the teeth do not collide as described above and form surface contact.

In addition, at the engagement part of the raking wheel that does not form a raking path, the protrusion of the raking wheel rotates forward and tries to spring out the stock base of the reaped grain culm. The culm is scraped into the lateral raking passage by the protrusion that extends diagonally laterally, allowing the culm to be raked without disturbing its posture.
In addition, although the meshing gap is narrow in this deeply engaged part, it is covered by the guide case, so the culm does not fall down or get caught, and the scraping ring and its support part are protected. Smooth conduction can be performed while preventing damage.

Furthermore, by deeply interlocking the scraping wheels in areas where no scraping passages are formed, the distance between the axes of those scraping wheels can be reduced, thereby making it possible to shorten one of the scraping passages and to reduce the required distance. The width of the machine can be configured to be narrow while ensuring the width of the raking passage.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
Fig. 1 is a plan view of the reaping conveyance section of the harvester, Fig. 2 is a plan view of the intermediate meshing part of the raking wheel, and Fig. 3 is a plan view of the intermediate meshing part with a wide meshing gap. 1... Cutting blade, 5... Scraping wheel, 6a, 6b, 7
a, 7b... Sprocket, 8a, 8b... Vertical conveyance chain, 10... Guide case, A, B... Scraping path, a, b, c... Distance between axes.

Claims (1)

[Scope of utility model registration request] At least two pairs of left and right star foil-shaped raking wheels for raking the reaped grain culm are disposed in a series by sequentially meshing with each other in the upper part of the cutting blade to form at least one pair of left and right raking passages, and these raking passages In a harvesting machine configured to merge and convey grain culms that are raked from the raking wheels, only the raking wheel at one end of the raking wheels is forcibly driven, and a pair of raking wheels forming the raking path are driven. The raking wheels are shallowly engaged with each other across the grain culm clamping space, and the raking wheels that are located in the middle and do not form a raking passage are deeply engaged so that the meshing gap is minute, so that the distance between the axes of both raking wheels is reduced. is narrower than other parts, and the deeply engaged part of these scraping wheels is covered with a guide case, and the front part of this guide case is made to cross between both scraping wheels so that their protrusions move forward. A grain culm in a harvesting machine, characterized in that substantially the entire length of the protrusion that covers the rotational transition part and moves laterally protrudes, and the rear side is along the grain culm raking passage from both front side parts. Scraping device.