JPH0799821A - Cutter-lifting device for combine - Google Patents

Abstract

PURPOSE:To enable auto-lifting of the cutting device for a combine depending on the detection of the residual stems by the second blade by maintaining a constant relative position of the second blade to the first blade. CONSTITUTION:In a general type combine by which whole stems are fed into a machine and where the first cutting blade 2 cuts the stems of the cropping plant at a higher position, and the second blade 3 cuts the residual stems at a lower position, a sensor 4 for automatically lifting the cutting device 1 depending on the detection of the stem residues is set near the second blade 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combine harvester lifting / lowering device, which is a general combine of all culm throwing type, and which automatically moves up and down by detecting the presence or absence of a cutting stalk by a second cutting blade. Available for

[0002]

2. Description of the Related Art A high position near the tip side of a napped culm is mowed by a first cutting blade, and a second culm by the first cutting blade is cut behind the first cutting blade. There is known a general-purpose combine harvester in which all culm is put into the harvest by cutting it from near the soil surface with a cutting blade. In this general-purpose combine, when raising and lowering the mowing device at the time of turning at the mowing edge or at the end of mowing, the second cutting blade is raised when the mowing device rises to a certain height, Other attempts have been made to add the action of raising the second cutting blade with a certain time delay after the steering operation for turning, but these are all the heights of the second cutting blade with respect to the first cutting blade. The positional relationship is not set, and it is necessary to readjust the reaping device to an appropriate position each time the reaping device is moved up and down. This positioning is very troublesome, and the reaping device is automatically operated based on the second cutting blade whose position changes. It was very difficult to lift.

Therefore, the present invention provides a second cutting blade for the first cutting blade.
The cutting device is automatically lifted according to the detection result of the presence or absence of residual culm by the second cutting blade while maintaining the height positional relationship of the cutting blade.

[0004]

The present invention is directed to a cutting device 1
In a combine of all culm throwing type provided with a first cutting blade 2 for high cutting at the front end and a second cutting blade 3 for cutting lower residual culm behind it, the presence or absence of residual culm is detected to obtain a reaping device. A culm lifting device is characterized in that a grain culm sensor 4 for automatically raising and lowering 1 is provided in the vicinity of the second cutting blade 3.

[0005]

ACTION AND EFFECT OF THE INVENTION The first cutting blade 2 and the second cutting blade behind it
At the time of work in a general-purpose combine of all culm throwing type having the cutting blade 3, the cutting height of the napped culm by the first cutting blade 2 is set to a high cutting position (for example, 320 mm from the soil surface),
The remaining culm (320 mm) after cutting with the first cutting blade 2,
Further, the cutting height by the second cutting blade 3 is set to a low cutting position (for example, 50 mm from the soil surface) to perform cutting, and the difference in cutting height between the first cutting blade 2 and the second cutting blade 3 (270 mm )
In any state, the grain culm sensor 4 arranged close to the second cutting blade 3 (for example, above one end of the cutting blade).
When no culm is detected by the contactor of the above, the detection result is used to automatically lift the mowing device 1 to a certain height, and the lowering limit is set so that the mowing height of the second mowing blade 3 becomes the low mowing position (50 mm). The stop position is set by, for example, a cutting height sensor so as to stop when it stops.

As described above, by setting the difference in cutting height between the first cutting blade 2 and the second cutting blade 3 to a constant amount and holding this constant amount, the first cutting blade 2 can be used as in the conventional case. The changing position of the cutting height between the cutting blade 1 and the second cutting blade 3 does not cause the rising position of the cutting device 1 to vary between high and low, and the operation such as turning is not hindered. The grain culm sensor 4 arranged close to the second cutting blade 3 can detect the absence of residual culm and automatically lift to the set rising position.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. A traveling device 7 having a pair of left and right crawlers 6 traveling on a soil surface is provided on the lower side of the combine chassis 5.
On the chassis 5, there is provided a threshing device 8 in the form of whole culm throwing, in which all culm culms are supplied and threshed, and the threshed grains are selectively collected.

In front of the threshing device 8, a weeding body 9 for weeding a napped culm from its front end side, a take-in reel 10 for scraping the culled culm from the tip side, and from the tip side. An auger case 11 having a first cutting blade 2 for cutting the scraped grain culm from a position closer to the tip side is placed at the front end, and the first cutting blade 2 cuts inside the auger case 11. A capturing auger 12 for taking in all the grain culms is provided.

A conveyor 13 for lifting and transporting all the culm culms taken in by the intake auger 12 to the threshing device 8.
The grain culm feeder 13 in which "a" is placed in the auger case 11
The cutting blade column 14 is installed obliquely from the left side of the rear side to the upper side and is provided along the rear edge of the auger case 11.
A second cutting blade 3 for cutting off the remaining culm that has been high-cut by the first cutting blade 2 from the vicinity of the soil surface is attached to the lower end side of, and the cutting device 1 is configured by these devices.

[0010] The rear end of the grain culm feeder 13 is mounted and supported by an upper conveying shaft 16 so that the whole grain culm can be supplied to the grain culm supply port 15 of the threshing device 8 and can be rotated up and down. A mowing lifting cylinder 17 which is hydraulically driven to move the mowing device 1 up and down with respect to the soil surface is provided between the lower surface of the grain stem feeder 13 on the front end side and the front end of the chassis 5.

A control cabin 18 for an operator is provided on the right side of the reaping device 1, and the grains sorted and collected by threshing are placed on the undercarriage 5 along the right side of the threshing device 8 behind the control cabin 18. A grain tank 19 for filling and storing grains,
Grain auger cylinder 20 for discharging the stored grains to the outside of the machine
And. The first cutting blade 2 is fixed to the tip of the auger case 11 with a screw or the like, and the cutting height can be adjusted as the cutting device 1 moves up and down. At the appropriate positions of the rear end edges of the left and right side plates 11a, 11b of the auger case 11,
The fixing plates of the second cutting blade up-and-down cylinder 21 that are hydraulically driven are fixed to the left and right cutting blade struts 14 at their one ends by fixing the mounting plates 14a with screws or the like, and the piston 21a of the second cutting blade up-and-down cylinder 21 is fixed. The tip ends are fixed to the left and right ends of the cutter base 22 of the second cutting blade 3 so that the cutting height of the second cutting blade 3 can be adjusted.

The second cutting blade 3 is a cutter base 2 serving as a main frame.
A finger 23, which is a receiving blade, is continuously attached to 2 and the cutting blade 24 integrally connected to the finger 23 is tightly pressed and attached by a blade presser 25 at appropriate intervals so that the cutting blade 24 can slide back and forth. Set up. A U-shaped cutting blade drive guide 26 having an open upper portion is fixed to one end of the cutting blade 24, and a cutting blade drive eccentricity in which a roller 27 which is loosely fitted and slid on the cutting blade drive guide 26 is supported at one end thereof. The shaft 28 is attached to the cutter base 2
A fixing flange 29 for fixing the piston 21a is bulged and supported on the shaft 2, and a lower universal joint 30 is connected to the other end of the cutting blade drive eccentric shaft 28.

The upper universal joint 33 is attached to the shaft protruding downward from the gear case 32 of the lower transfer shaft 31 of the transfer conveyor 13a provided on the outside of the side plate of the grain culm feeder 13.
And the upper universal joint 33 and the lower universal joint 30.
A cutting blade drive shaft 34, which is expandable and contractible when adjusting the cutting height of the second cutting blade 3, is provided between and. The grain culm sensor 4 is projected forward from one end of the cutter base 22, and the contactor 4a of the grain culm sensor 4 is placed in front of the cutting blade 24 to detect the presence or absence of grain culm by passing the napped grain culm. And a cutting height sensor 35 for detecting the cutting height by vertically swinging the contacts of the cutter base 22 from the lower surface of the cutter base 22 toward the rear side, and moving the contactor up and down one by one. Arrange and configure.

The scraping reel 10 is provided with tines 44 for scraping the tips of the napped culms on the outer circumference over the entire width of the auger case 11 so as to project downward from each vertex of the hexagon. The left and right reel slide metals 37 support the reel shaft 36 for pivotally mounting the take-in reel 10, and the left and right reel slide metals 37 are fixed to the upper rear ends of the left and right side plates 11a and 11b of the auger case 11. The left and right reel support pieces 38 extend forward and are supported by left and right reel support arms 39 that are vertically rotatably supported.

Between the bases of the left and right reel support arms 39 and the left and right side plates 11a and 11b of the auger case 11, left and right reel up and down cylinders 40 for vertically moving the left and right reel support arms 39 are connected and provided. Along with the left and right reel support arms 39 and the left and right reel slide metals 37, left and right reel front and rear cylinders 41 for moving the take-in reel 10 back and forth are provided.

In the take-in reel 10, the left and right reel side plates 42 are axially attached to the reel shaft 36 with the same width as the cutting width to form a main frame, and the reel angle is provided outside the left reel side plate 42. A reel adjusting plate 43 for adjusting is provided so as to be eccentrically displaced with respect to the reel shaft 36 so as to be loosely fitted and supported, and the left and right reel side plates 4 are provided.
Six arms 42a are radially extended from 2 as required, and one end 45a of a tine mounting plate 45 for mounting the tine 44 is rotatably supported between the left and right ends of the arms 42a, and the other end 45b is provided. And the respective tip portions of the arms 43a extending from the reel adjusting plate 43 according to the reel side plate 42 are connected to each other.

The reel shaft 36 and the tine adjusting shaft 46 provided at the center position of the reel adjusting plate 43 are connected to each other so that the reel adjusting plate 43 is eccentric with respect to the reel side plate 42 so that the tine 44 is eccentric. A tine adjustment arm 47 for changing the angle is provided, one end of the tine adjustment arm 47 is connected to one end of the tine adjustment rod 48, and the other end is connected to the left side plate 11a of the auger case 11 and the reel support arm 39. The tine adjustment link 49 is connected to the connection part of the tine adjustment link between the two. In addition, on the side of the auger case 11 of the tine adjustment link 49, a support metal 49a and a spring 49b which are rotatable for escape when the take-up reel 10 is raised.
It is constructed so that it can be expanded and contracted.

A control device 50 for automatically controlling the reaping device 1 is provided inside the control cabin 18, and the control device 50 includes the grain culm sensor 4, the cutting height sensor 35, and the reaper lifting cylinder 17. , 2nd cutting blade vertical cylinder 2
1, reel up / down cylinder 40, reel front / rear cylinder 41
Etc. are connected and configured. Next, the operation of the above configuration will be described.

The napped culms slaughtered by the sward body 9 are scraped from the tip side by the tines 44 of the scraping reel 10, and the scraped napped culms are moved to a high position by the first cutting blade 2 (for example, (320 mm from the soil surface), and the whole culm of the cut culm is collected and collected in the auger case 11 to the opening position of the culm feeder 13 by the culm spiral of the intake auger 12, and the conveyor conveys from this opening. Thirteen
The whole grain culm collected by a is the threshing device 8 on the upper rear side.
It is sent to the grain culm supply port 15 of the above, threshing processing is performed by the threshing device 8, and the selected grain is filled and stored in the Glen tank 19.

At the time of these operations, the remaining culm cut by the first cutting blade 2 is cut by the second cutting blade 3 arranged along the rear side surface of the auger case 11. Is cut at a position (for example, 50 mm from the soil surface) set by the cutting height sensor 35, and the difference in cutting height between the first cutting blade 2 and the second cutting blade 3 (for example, 270 mm) is controlled. When the grain culm sensor 4 provided at the upper adjacent position of the second cutting blade 3 does not detect a napped grain culm, which is set by the device 50 and is controlled by the control device 50 at the time of turning at the cutting edge or at the end of mowing. Automatically lifts the reaping device 1 to the set rising position. When the second cutting blade 3 protrudes downward and becomes an obstacle during this automatic lift, it is moved up to the bottom position of the auger case 11, but is set when lowering the cutting device 1. The second cutting blade 3 is automatically returned to hold the value.
The cutting height sensor 35 provided at the lower position controls the cutting height from the soil surface to a constant cutting height.
Can maintain a constant cutting height in any state.

The second cutting blade 3 is provided with the auger case 11
The left and right side plates 11a, 11b are supported by the left and right cutting blade columns 14 standing upright along the rear end edges thereof, and the second cutting blade up-and-down cylinder 21 fixed to the cutting blade columns 14, so Like this, the frame structure is complicated,
For this reason, when the vibration is increased or the first mowing blade 2 is mowed low, the second mowing blade 3 cannot move upward from the bottom surface of the auger case 11. There is no need to remove the second cutting blade 3 and the rigidity of the supporting structure can be secured, and the second cutting blade 3 is placed above the bottom surface of the auger case 11 when cutting the first cutting blade 2 low. It can be easily moved up and down. In addition, since the left and right second cutting blade up-and-down cylinders 21 can control the operation for each of the left and right, the cutting device 1
Is particularly effective in a combine or the like that does not roll.

Further, as shown in FIG. 6, the roller of the cutting blade drive eccentric shaft 28 in which the second cutting blade 3 is connected to the extendable cutting blade drive shaft 34 supported by the upper and lower universal joints 33, 30. Since the cutting blade 24 can be driven by the eccentric movement of the roller 27 only by loosely fitting the cutting blade driving guide 27 from the upper side to the cutting blade driving guide 29 having an open upper portion, as in the conventional case, the two-stage or three-stage link is used. No mechanism is required, the configuration is simplified, cost is reduced, and quality is stabilized.

The take-up reel 10 moves up and down by vertically moving the reel support arm 39 by the action of the reel up-and-down cylinder 40, and moves forward and backward by moving the reel slide metal 37 forward and backward by the action of the reel front-rear cylinder 41. Moving. When the napped culm is lying down, the front and rear position and the descending position of the take-up reel 10 are optimally adjusted to perform mowing. At the time of this mowing, the take-up reel 10 is interlocked. As shown in FIG. 7, by rotating the tine adjusting arm 47 via the tine adjusting rod 48 by the bending action of the tine adjusting link 49, the rake angle of the tine 44 is reduced.
It is effective in significantly reducing uncut areas and head loss during the cutting of lodging grain culms, and removing excessive force. In this way, the rake angle of the tine 44 can be automatically adjusted to large or small by interlocking with the upward movement / downward movement of the take-in reel 10. The operator does not have to adjust the rake angle of the tine 44 by descending from the control cabin 18 each time, and the trouble of not forgetting this adjustment is eliminated. The cutting work of the culm can be smoothly and favorably performed.

[Brief description of drawings]

FIG. 1 is a side view showing the entire combine.

FIG. 2 is a plan view showing the entire combine.

FIG. 3 is a side view showing a part of the reaping device.

FIG. 4 is a front view showing a part of the reaping device.

FIG. 5 is a plan view showing the entire second cutting blade.

FIG. 6 is a perspective view showing a part of a second cutting blade.

FIG. 7 is a schematic view showing the working relationship of the take-in reel.

[Explanation of symbols]

 1. Mowing device 2. First cutting blade 3. Second cutting blade 4. Grain culm sensor

Claims (1)

[Claims] 1. A all-culm throwing combine in which a first cutting blade (2) for high cutting at the front end of the cutting device (1) and a second cutting blade (3) for further cutting the residual culm at the rear thereof are provided. A harvesting elevating device which is provided with a grain culm sensor 4 for detecting whether or not the reaping device is present and automatically elevating the reaping device 1 in close proximity to the second cutting blade 3.