JPH0715397Y2 - Straw cutting device in combine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a straw cutting device in a combine, which cuts straw after threshing arbitrarily in a short length.

[Conventional technology]

Conventionally, combine combine straw cutting device that can cut straw after threshing arbitrarily in long and short, cutting blades with different outer diameters are alternately arranged in parallel on one of two axes, and the same diameter is cut on the other. The blades are arranged in parallel corresponding to the cutting blades of the one shaft, and the intervals of the two shafts are changed to engage all the cutting blades of both shafts, or
One in which the cutting length can be arbitrarily changed to short or long by engaging a large-diameter cutting blade of one shaft with a part of the corresponding cutting blade of the other shaft, or one-to-one correspondence Cutting in which two axes out of three axes consisting of a biaxial having a cutting blade and a monoaxial having a cutting blade corresponding to a part of the above-mentioned cutting blade are selected and combined so that the cutting length can be arbitrarily switched between long and short Straw cutting devices of variable length are known.

However, when changing the distance between the above two axes, when cutting all the cutting edges of both axes to cut a short length, the small-diameter cutting blade and the large-diameter cutting blade have different engagement depths with the corresponding cutting blades. There is a problem in accuracy, and the triaxial type has a drawback that the structure is complicated and the cost is high.

[Problems to be solved by the present invention]

Therefore, multiple cutting blades are installed side by side on one of the two parallel axes,
On the other shaft, a short cutting scraping blade that meshes with each cutting blade of the one shaft in a one-to-one correspondence, and among the short cutting scraping blades, some short scraping scraps that are not adjacent to each other Side-by-side long blades for long cutting of the same shape arranged in parallel at a predetermined interval to the blade, and the cutting blade of the one shaft by moving one shaft in the axial direction,
One-to-one correspondence with the short-cut scraping blade of the other shaft, or a part of the cutting blade of the one shaft and the long-cut scraping blade of the other shaft are meshed to each other, and the straw is discharged. There was proposed a combine harvester cutting device for combine harvesters that was capable of switching between long and short cuts arbitrarily.However, with this, both the short cutting blade and the long cutting blade that form a pair of shafts have the same polished surface. In the direction
If the cutting edge polishing surfaces of the cutting blade of the other shaft that meshes with this are arranged so that the cutting edge polishing surfaces face each other at one cutting position, the result is that the non-polishing surfaces face each other at the other switching cutting position. However, there were obstacles such as the blades sticking to each other due to the bending of the shaft when cutting the straw, and in extreme cases, the blades crossed over.

Further, the distance between the pair of short-cut scraping blades and the long-cut scraping blades cannot be wide due to the structural limitation of the device, and therefore straw chips easily enter between both scraping blades and are easily wound. It took a lot of time to remove it, and there was a problem that the durability of the blade was hindered when the wound straw was covered with mud.

The present invention has been made to solve the above-mentioned conventional problems, and it is possible to prevent the interlocking of blades interlocking with each other at the time of straw cutting and crossover, and between the pair of scraping blades, It is an object of the present invention to provide a straw cutting device in a combine, in which the cutting blade shaft and the scraping blade shaft are not wrapped with straw waste.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a straw cutting device for a combine, wherein the pair of short cutting blades and long cutting blades are arranged such that both blade tip polishing surfaces thereof face each other. There is a large diameter collar between both scraping blades that does not come into contact with the opposing cutting blades, and a large diameter collar that rotates with both scraping blades is interposed. It is characterized by interposing a small diameter collar.

[Action]

Therefore, when the cutting blade and the scraping blade are arranged so that the cutting edge polishing surfaces face each other at one cutting position, the cutting blade and the scraping blade face the non-polishing surface with the polishing surface and the non-polishing surface facing each other at the other switching cutting position. Since the surfaces do not face each other, a repulsive force is generated between the two blades at the time of cutting by the facing inclined surfaces of the two blades or the inclined surface of one of the blades, and the interference between the two blades and the obstacle for crossing over are eliminated.

In addition, the straw scraps that enter the narrow gap between the pair of scraping blades are cut by the mating cutting blade on the peripheral surface of the large-diameter collar that rotates with both blades and have no wrapping. Straws that come into contact with the insert blade shaft do not rotate because the small-diameter collars float with each shaft and do not rotate, and the cut straws are discharged through a wide gap between the shaft small-diameter collars.

〔Example〕

 Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

In FIG. 5 and FIG. 6, reference numeral 1 is a combine to which the present invention is applied. The combiner 2 is a lower part of the machine body, a pretreatment part 3 is in the front part, a threshing part 4 is in the center part, and a driving operation part is in the front side part. 5, the central side part is provided with the paddy treatment part 6 and the rear part with the straw cutting part 7, and the grain culm cut by the pretreatment part 3 is sent to the threshing part 4 by the threshing feed chain 8, and the threshed straw is Straw cutting transport chain 9
Is sent to the straw cutting unit 7.

The straw cutting part 7 is a switching plate 1 for opening and closing the straw input port 10 on the upper surface.
1.A cutting device 12 is provided inside, and a straw discharge port 13 is provided at the bottom.When switching off threshed thresh after threshing, the switching plate 11 is closed, and when cutting, the switching plate 11 is opened and discharged. The straw is introduced into the cutting section 12, cut and discharged from the straw discharge port 13.

As shown in FIGS. 1 to 4, the cutting device 12 includes a plurality of cutting blades 16 juxtaposed on a cutting blade shaft 15 and a plurality of short cutting blades 18 juxtaposed on a raking blade shaft 17. Alternatively, the long cutting blade 18 'is selectively meshed with the cutting blade shaft 15 so that the straw can be switched between long and short as desired.
Both ends are axially supported by a ball bearing 20 fixed to 9 ', and each cutting blade 16 is held in parallel on the cutting blade shaft 15 by a holding plate 21 and a positioning collar 22 at equal intervals. Positioning collar
A small-diameter collar 22 'that does not rotate with the cutting blade shaft 15 is externally fitted to the cutting blade 22, and a jumping plate 23 is attached to the end of the cutting blade shaft 15 on the root side.

The scraping blade shaft 17 has ball bearings 24 mounted on both ends, bearing holders 25 on the outer periphery of the scraping blade shaft 17 are loosely fitted to sleeves 26 fixed to the frames 19 and 19 'on both sides, and a screw handle 27 provided on the frame 19 is rotated. By moving, the bearing holder 25 moves back and forth in the sleeve 26, and the scraping blade shaft 17 is moved in the axial direction.

On the axis of the scraping blade shaft 17, a short cutting scraping blade 18 that meshes in a one-to-one correspondence with the cutting blade 16 and a part of the short cutting scraping blade 18 which are not adjacent to each other Short cutting blade, that is, in the illustrated example, every other short cutting blade 18 has a small interval D _{2 of} about 100 mm.
And the same-shaped long cutting-in blade 18 'are held in parallel by pressing plates 28, 28', respectively, and the pair of short-cutting blade 18 and long-cutting blade 18 'are paired. A large-diameter collar 29 having a large diameter that does not come into contact with the opposing cutting blades 16 and that rotates with both the scraping blades 18 and 18 'is interposed therebetween. In addition, a short cutting blade
Of the 18 cutting blades for short cuts that do not form a pair with the scraping blade for long cuts 18 '
The pressing plate 28 'on the side of the long-cutting movement of 18 has a large diameter such that it does not come into contact with the opposing cutting blades 16 at the peripheral portion of the holding plate 28', and the width D ₃ is the distance D ₂ between the pair of scraping blades 18 and 18 '. A slightly wider channel flange 30 is formed. And, except for between the pair of short cutting blades 18 and long cutting blades 18 ′, each of the cutting blades 18 and 18 ′ has a holding plate 28 or 2.
8'and a positioning collar 31 are held in parallel on the scraping blade shaft 17, and a small diameter collar 31 'which does not rotate together with the scraping blade shaft 17 is fitted on the positioning collar 31.

The cutting edge polishing surfaces of the pair of scraping blades 18 and 18 'are arranged to face each other, and the cutting edge polishing surface of the cutting blade 16 is one-to-one with this.
Are arranged so as to face the polishing surface of the corresponding short-cutting scraping blade 18.

The cutting blade shaft 15 has a pulley 33 of a pinion 32, and the scraping blade shaft 17 has a large diameter gear that meshes with the small diameter pinion 32 of the cutting blade shaft 15.
34 are fixed to each other, and the take-up blade shaft 17 is rotated at a low speed in the opposite direction in conjunction with the cutting blade shaft 15 that is rotated at high speed by the power of the combine 1, so that the peripheral speeds of the cutting blade 16 and the take-up blades 18 and 18 'are increased. Straw is scratched and cut due to the difference. The pinion 32 has such a thickness that the meshing does not come off even if the gear 34 moves along with the length changeover movement of the scraping blade shaft 17.

When cutting a short piece of straw during the straw cutting operation, rotate the screw handle 27 and the bearing holder 25
26 If the scraping blade shaft 15 is moved to the end cutting side (left in the figure) until it comes into contact with the end and is stopped, the short cutting position shown in FIGS. 1 and 3 is reached. At this position, the cutting blade 16 and the short-cutting scraping blade 18 corresponding to this one-to-one have their cutting edge polishing surfaces opposed to each other, and an appropriate cutting edge gap d of 1 to 2 mm suitable for straw cutting is automatically set. Set to engage. Here the straw cutting part 7
By opening the switching plate 11 of the cutting blade shaft 15 and rotating the cutting blade shaft 15 and the scraping blade shaft 17, the straw conveyed by the straw conveying chain 9 is cut into the cutting blade 16 and a short cut corresponding to this one-to-one. The cutting blade 18 cuts a short distance at the interval D ₁ of the cutting blade 16. Pressing plate for the short cutting blade 18 that does not pair with the long cutting blade 18 'when cutting
The rising portion 30 'of the groove-shaped flange 30 at the periphery of 28' and the long-cutting scraping blade 18 'which does not affect cutting serve as a support for the receiving blade. And since the cutting blade 16 and the double-blade tip polishing surface of the short cutting scraping blade 18 are opposed to each other, a repulsive force is generated between the double blades 16 and 18 due to the inclined surfaces of the double blades 16 and 18 in opposite directions during cutting, The double blades 16 and 18 are prevented from crossing each other and crossing over.

In addition, the straw scraps that have entered the narrow gap between the pair of short-cut and long-cut scraping blades 18 and 18 'are paired with the large-diameter collar 29 that rotates with both blades 18 and 18'. Since it is cut by 16 and does not cause winding or clogging, and the straw chips that contact the cutting blade shaft 15 part and the scraping blade shaft 17 part also do not rotate together because the small diameter collars 22 and 31 float with each shaft 15 and 17. A large amount of cut straw without wrapping falls through a wide gap between both shafts 15 and 17, and the straw outlet 1
Emitted from 3.

In the case of a long culm longer than the width of the cutting device 12, the stock of the culm sticks out of the cutting device 12, and the protruding part becomes a long cut, but it is long by the jumping plate 23 provided on the cutting blade shaft 15 on the high speed rotation side. The breaks are strongly jumped out and obstacles such as clogging are eliminated.

When cutting a long length of straw, rotate the screw handle 27 in the opposite direction and move the scraping blade shaft 15 to the stop position on the long cutting side (right side in the figure). Switch to the cutting position. At this position, the long cutting scraping blade 18 'and the corresponding cutting blade 16 are automatically engaged with each other by setting an appropriate cutting edge interval, while the intermediate cutting blade 16 and the short cutting scraping blade 18 are The gap is disengaged and the straw is cut at a length that is an integral multiple of the distance D ₁ of the cutting blade 16 (2D _{1 in the} illustrated example).

At this time, the blade edges of the cutting blade 16 and the long-cutting scraping blade 18 'that are engaged with each other face the polished surface and the non-polished surface, but since one of the facing surfaces is an inclined surface, repulsive force is still exerted on both blades 16 and 18. Occurrence of the double-edged blades 16 and 18 'is prevented and crossing over is prevented.

The straw chips that come between the pair of short-cut and long-cut scraping blades 18 and 18 'and come into contact with the cutting blade shaft 15 and the scraping blade shaft 17 are wound in the same way as in the case of short cutting. Prevents sticking and clogging.

[Effect of device]

As described above, according to the present invention, a plurality of cutting blades are arranged in parallel on one of the two parallel shafts, and the other shaft has a short cut that meshes with the respective cutting blades of the one shaft in a one-to-one correspondence. And a short cutting blade of the same shape, which is parallel to the short cutting blade of the short cutting blade, which is not adjacent to each other and is arranged in parallel at a predetermined interval. , By moving one shaft in the axial direction to engage the cutting blade of the one shaft with the short-cut scraping blade of the other shaft, which corresponds to this one-to-one, or the cutting blade of the one shaft In the straw cutting device in the combine, in which a part of the long shaft cutting blade of the other shaft is engaged, and the straw can be arbitrarily switched to cut short and long, the pair of the cutting blade and the cutting blade is , The blade edge polishing surfaces are arranged to face each other, and between the both scraping blades, the diameter is large enough not to contact the opposing cutting blades, and A large-diameter collar that rotates with the scraping blade is interposed, and a small-diameter collar that can float on each axis is interposed between the blades of other parts, so that the cutting blade and the scraping blade can be used for both short and long cutting. The non-polishing surfaces do not face each other, and at least one of the blades has a slanting surface, so that a locomotive force is generated between the two blades at the time of cutting the straw, so that the two blades are prevented from interfering with each other or from obstacles when passing over.

Also, the straw chips that enter the narrow gap between the pair of short-cut and long-cut scraping blades are cut by the mating cutting blade on the peripheral surface of the large-diameter collar that rotates with the scraping blade and are wound or wound. Straws that do not clog and contact the cutting blade shaft and scraping blade shaft also do not rotate because the small-diameter collars do not rotate with the shafts,
It is possible to eliminate a decrease in work efficiency caused by stopping and removing work due to winding or clogging of straw waste, and at the same time, improving cutting performance and maintainability of the device.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a sectional side view of a main part of the device of the present invention, FIG. 2 is a front view of a cutting blade and a scraping blade engaged with the cutting blade, and FIG. FIG. 4 is a schematic side view of the combine at the short cutting position, FIG. 4 is a schematic side view of the same device at a long cutting position, FIG. 5 is a schematic plan view of a part of the combine equipped with the same device, and FIG. It is a partial notch schematic side view. 1 ... Combine, 7 ... Straw cutting part, 12 ... Cutting device, 15 ...
Cutting blade shaft, 16 ... Cutting blade, 17 ... Scraping blade shaft, 18 ... Short cutting scraping blade, 18 '... Long cutting scraping blade, 22', 31 '... Small diameter collar, 29
… Large color.

Claims (1)

[Scope of utility model registration request] 1. A scraping blade for short cutting, in which a plurality of cutting blades are arranged in parallel on one of two parallel axes, and the other shaft engages with each cutting blade of the one shaft in a one-to-one correspondence. And, among the above-mentioned short-cutting scraping blades, a short-cutting scraping blade of the same shape arranged in parallel at a predetermined interval to some short-cutting scraping blades that are not adjacent to each other are juxtaposed, and one shaft By moving the one in the axial direction to engage the cutting blade of the one shaft with the short-cut scraping blade of the other shaft, which corresponds to this one-to-one, or a part of the cutting blade of the one shaft. In the straw cutting device in a combine in which the long shaft scraping blade of the other shaft is engaged and the straw can be switched between long and short arbitrarily, in a combine cutting device, a pair of the short cutting blade and the long cutting blade are paired. The blades are arranged such that the polished surfaces of both cutting edges face each other, and the blades have a large diameter between the scraping blades and do not come into contact with the facing cutting blades. Interposing a large diameter collar of the blade and rotating together, straw discharge cutting device in a combine being characterized in that interposing a freely movable small color each axis between each blade of another portion.