JPH0528987Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to the structure of a raking auger for a combine harvester.

(b) Conventional technology Conventionally, in general-purpose combine harvesters, a raking auger is installed parallel to the cutting blade of the cutting part in order to transport the grain culm from the cutting part to the threshing part. The grain culm harvested by the blade is transported to the front of a feed chamber connected to the rear of the reaping section, and then fed into the feed chamber by fingers provided on the auger.

(c) Problems that the invention aims to solve However, combine harvesters are not necessarily configured symmetrically; for example, there are combine harvesters in which the driving section and grain tank are placed on the right side of the machine, and the threshing section and sorting section are placed on the left side. In such combines, the feed chamber is offset to the left with respect to the reaping section in order to transport grain from the reaping section located at the front of the machine to the threshing section on the left side of the machine. Although the amount of grain culms to be collected and transported on the right side and the left side of the feed chamber of the auger is larger than that on the left side, this point has not been taken into consideration, so the amount of grain culms conveyed in the feed chamber is The layer is also thicker on the right side than on the left side, making it easier for grain culms to clog in the same feed chamber.Also, of the left and right feed chains installed inside the same chamber, only the right feed chain tends to stretch, reducing conveyance performance. Another drawback was that the various parts around the chain were subject to increased wear.

(d) Means for solving the problem In this invention, a raking auger is mounted on a shaft at the rear of the reaping section, left and right spiral blades are provided protruding from the circumferential surface of the drum of the auger, and inner terminal ends of the left and right spiral blades are installed. This scraper of a combine is constructed in such a way that a scraping action part is formed with a spacing of In the structure of the raking auger, the feed chamber is provided offset to one side with respect to the center of the left and right width of the raking auger, and the ratio of the overlap length between the left and right spiral blades and the opening of the feed chamber is adjusted. To provide a structure of a raking auger for a combine harvester, in which the ratio of the lengths from the center of the raking action part of the raking auger to the right and left ends of the same auger is approximately equal to each other. It is.

(E) Function/Effect With this invention, even if the amount of grain conveyed on the left and right sides is different due to the difference in the length of the left and right sides of the raking auger, the left and right length from the center of the raking action part of the same auger can be adjusted. ratio and
Since the ratio of the overlap lengths between the inner ends of the left and right spiral blades of the auger and the opening of the feed chamber entrance is approximately equal, the grain culm carried into the opening can be carried over the front surface of the opening. The grain is consolidated to an approximately uniform density, and the uniformly consolidated grain culm is fed into the feed chamber by fingers, so the load on the feed chain installed in the same chamber is uniform on the left and right sides, improving conveyance performance. This has the effect of preventing problems such as clogging of the grain culm and elongation of the feed chain on one side.

(F) Example The example of the present invention will be explained in detail based on the drawings.
In Fig. 1, A indicates a combine harvester, in which a machine frame 2 is mounted above a running section 1 consisting of a pair of left and right crawlers, and a threshing section 3 and a sorting section 4 are arranged vertically on the left side of the upper surface of the frame 2. On the right side, a driver section 5 is disposed at the front, a grain tank 6 is disposed from the center to the rear, and a reaping section 8 is connected to the front of the frame 1 via a feed chamber 7 so as to be able to rise and fall freely. ing.

The feed chamber 7 is interposed between the front part of the threshing section 3 and the reaping section 8 on the left side of the machine, and therefore the feed chamber 7 is offset to the left from the center line of the machine.

The reaping section 8 connects a generally box-shaped case 9 with an open top to the front end of the feed chamber 7 to communicate the inside of the case 9 with the inside of the feed chamber 7, and also includes a scraping auger inside the case 9. 10 is horizontally pivoted and rotated by a drive mechanism 11, and the case 9 is rotated by a drive mechanism 11.
A cutting blade 12 is arranged in series at the front end of the cutting blade 12, a grass dividing plate 13 is arranged in front of the cutting blade 12, and a reel tine part 14 is arranged above the cutting blade 12.

The scraping auger 10 includes a drum 15 connected to a drive mechanism 11, left and right spiral blades 16, 17 protruding from the outer periphery of the drum 15, and a plurality of retractable fingers 18-1, 18 provided on the outer periphery of the drum 15. -2,
18-3...

The left and right spiral blades 16 and 17 are provided projecting from the outer periphery of the drum 15 that is pivotally supported inside the case 9, with the left and right ends as starting ends.
6a and 17a extend to the front of the opening 19, and form a scraping action part M with a space between the inner end ends 16a and 17a.
6a, 17a and the left and right ends 19a, 19 of the opening 19
b overlap each other, and the left and right overlap lengths m and n are set as follows.

That is, as shown in FIG.
The length obtained by multiplying the length X, Y from the center g of the raking action section M, where the raking actions directed inward from the left and right sides of the auger are counterbalanced, to the left and right ends of the auger 10, multiplied by a certain number. are the above overlap lengths m and n, respectively.
By setting, the ratio of the lengths X and Y from the center g of the scraping action part M to the left and right ends of the scraping auger 10,
The ratio of the left and right overlap lengths m and n is made equal.

Note that the inner end 16 of the left and right spiral blades 16, 17
a and 17a are provided with their phases differing by about 60 degrees.

In addition, the center cf of the feed chamber 7 is offset x to the right of the center g of the scraping action section M, so that the amount of grain culm fed into the feed chamber 7 is balanced left and right.

As mentioned above, the length X on the left and right sides of the scraping auger 10,
Since the ratio between Y and the left and right overlap lengths m and n is equal, the opening 19 is
The grain stems transported forward are compacted almost uniformly in front of the opening 19, and furthermore, the arrangement density of the fingers 18 in front of the opening 19 is approximately proportional to the lengths X and Y. Because of this, the action of feeding grain culms into the feed chamber 7 is also carried out with a strength approximately proportional to the amount of grain culms.

The retractable fingers 18-1, 18-2...
A finger insertion hole 20 is bored on the outer periphery of the drum 15, and a bushing 21 is inserted into the insertion hole 20.
A finger main body 22 is inserted into the bushing 21, and an inner end 22a of the finger main body 22 is pivotally supported on a crank pin 23a eccentrically located below a fixed crank 23 inserted into the drum 15. While the body 22 rotates together with the drum 15, the outer end 22 of the finger body 22
In the upper position, b is substantially flush with the outer surface of the bushing 21, and in the lower position, it is configured to protrude from the outer peripheral surface of the drum 15 by approximately twice the amount of eccentricity mentioned above.

The fixed crank 23 is of an assembly type, and has a structure in which the crank pin 23a and a crank journal 23b pivotally supported on the center line of the drum 15 are connected via a crank web 23c, and one end is connected to the reaping section 8. Fixed.

Such retractable fingers include left and right side fingers 18-1, 1 provided at the left and right ends of the drum 15.
8-2, and center fingers 18 distributed approximately evenly on the drum 15 in front of the opening 19.
-3, 18-4... and right side finger 18-
There is an intermediate finger 18-m provided between the center finger and the left and right spiral blades 16, 1.
7 and the same fingers 18-3, 18-
There is a slight overlap with the part where 4... is placed.

Then, the drum 1 of this overlap part 25
5. A winding prevention plate 26 is provided on the outer periphery of the winding prevention plate 26, and the prevention plate 26 extends inward from the retractable fingers 18-3 disposed on the left and right outermost sides.
The base 27a of the mounting plate 27 is fixed to the outer peripheral surface of the drum 15 at the position just before the outermost finger 18-1 with respect to the rotational direction, and the tip 2
7b is bent, and a substantially rectangular wrapping prevention plate 26 is connected to the tip 27b, and the prevention plate 26 is given a receding angle θ of approximately 30° with respect to the rotational direction of the drum 15. The protruding height H of the prevention plate 26 from the outer circumferential surface of the drum 15 is set in a range of 1/3 to 1/2 of the maximum protruding height h of the retractable finger 18 from the outer circumferential surface.

The embodiment of this invention is constructed as described above, and the grain culm cut by the cutting blade 12 is scraped up to the front of the feed chamber 7 of the case 9 by the left and right spiral blades 16, 17 of the scraping auger. Appearing finger 18
-1, 18-2... and left and right wrapping prevention plates 26, 2
6 into the feed chamber 7, the amount of grain culm scraped up in front of the opening 19 by the scraping auger 10 is on the left side of the center g of the scraping action part M. is proportional to the length X to the left end of the auger 10, and the right side is proportional to the length Y to the right end, and the left and right ends 19a, 1 of the opening 19 are
9b and the inner end 16 of the left and right spiral blades 16, 17
By making the ratio of the left and right overlap lengths m and n with a and 17a equal to the ratio of the above lengths X and Y,
In front of the opening 19, the grain culms scraped together by the scraping auger 10 are compacted almost uniformly across the front surface of the opening 19, and are fed into the feed chamber 7 in this uniformly compacted state. Because it is done,
The load applied to the left and right feed chains provided in the feed chamber 7 is also equalized on the left and right sides, thereby preventing the chains from elongating to one side.

In addition, the inner end 16 of the left and right spiral blades 16, 17
Since the phases of a and 17a are different from each other, it is possible to prevent grain culms from staying near the raking action part M where the raking action part M is slightly vibrated left and right and the conveying action is reduced. Since the grain culm near the raking action part M vibrates from side to side, the throwing action of the finger 18 into the opening 19 is strengthened. The disparity in culm amount is absorbed.

Further, FIG. 6 shows another embodiment of the center finger arrangement position, in which the leftmost and rightmost fingers 18-p and 18-s of the center finger group G are shown.
Feed into the opening 19 of the feed chamber 7 is made such that the ratio of the distances a and b between the feed chamber 7 and the left and right ends of the feed chamber 7 is approximately inversely proportional to the distances c and d between the left and right ends of the feed chamber 7 and the left and right ends of the reaping section 8. This is to balance the left and right grain culms.

[Brief explanation of the drawing]

FIG. 1 is an overall side view of a combine harvester having a scraping auger structure according to the present invention. FIG. 2 is a partially cutaway plan view of the scraping auger. FIG. 3 is an explanatory plan view of the reaping section. FIG. 4 is a sectional view of FIG. 2. FIG. 5 is a sectional view of FIG. 2. FIG. 6 is an explanatory plan view of the reaping section of another embodiment. A... Combine harvester, M... Scraping action part, X, Y
...Length from the center of the raking action section to the left and right ends of the raking auger, g...Center, m, n...Right and left overlap length, 7...Feed chamber, 8...Reaping section, 10... ...Kraking auger, 16, 17... Left and right spiral blades, 16a, 17a... Same inner end, 19...
…Aperture.

Claims (1)

[Scope of utility model registration request] A scraping auger 10 is mounted on a shaft behind the reaping section 8, and left and right spiral blades 1 are mounted on the circumferential surface of the drum 15 of the auger 10.
6, 17 are provided protrudingly, and a spacing is provided between the inner ends of the left and right spiral blades 16, 17 to form a raking action part M, and the raking action part M and each inner side of the left and right spiral blades 16, 17 In the structure of the scraping auger for a combine harvester configured such that the terminal end faces the opening 19 of the feed chamber 7 that opens at the rear of the scraping auger 10, the feed chamber 7 is positioned relative to the center of the horizontal width of the scraping auger 10. The ratio of the respective overlap lengths m and n of the left and right spiral blades 16, 17 and the opening 19 of the feed chamber 7 is the same as the scraping acting portion M of the scraping auger 10. The structure of a scraping auger for a combine harvester is configured to substantially match the ratio of the lengths X and Y from the center g to the left and right ends of the auger 10.