JPH0444029Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a cutting blade position changing device in a combine harvester, particularly a full-feed type combine harvester.

(Prior art) In the conventional full-feed combine harvester, the crops harvested by the cutting blade device are transferred from the raking auger to the chain conveyor in the feeder house, and the crops conveyed by the chain conveyor are transferred to the feeder house using the chain conveyor. The grain is supplied to the handling room where it is threshed.

The reaping device uses a link device to drive the cutting blade.

(Problems to be solved by the invention) In the conventional combine harvester as described above, when it is desired to change the distance between the auger and the cutting blade depending on the crop culm or the length of the intake culm in order to improve the reaping and intake performance. Since the reaping device uses a link device, it is necessary to prepare links of different lengths and short lengths, making it difficult to change the distance between the auger and the cutting blade.

(Means for solving the problem) Therefore, the technical problem of this proposal is to create a combine harvester that can easily change the distance between the auger and the cutting blade (fixed blade and cutting blade). The technical means of this proposal to solve this technical problem is to install a scraping auger in a full-feed combine harvester equipped with a feeder house and a scraping auger in front of the handling chamber where the handling barrel is installed. A fixed blade mount is attached to the front frame of the platform with a replaceable spacer for adjusting the front and back position of the fixed blade, so that the position of the cutting blade can be extended. The cutting blade drive arm, which is a moving lever, is configured so that the mounting position relative to its reciprocating rotation axis can be extended to adjust the cutting blade position. This allows the distance to be changed.

(Effect of the invention) In general, the cutting blade section requires firm mounting and frame rigidity in order to suppress the inertia force caused by the reciprocating movement of the cutting blade, but in this invention, the drive section is in a fixed position and the frame Since only the fixed blade mount for the blade and the cutting blade drive arm for the reciprocating drive shaft are movable, the reaping drive unit can be mounted firmly and the frame has sufficient rigidity, making it easy to carry out reaping work. Since there is no problem and the structure is simple to change, replacement work can be easily performed.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

First, a conventional full-feed type axial flow combine shown in FIG. 9 will be explained.

The crops are raked by a raking reel 1 and harvested by a cutting blade 2, and the cut crops are transported from a raking auger 3 to a handling room 6 by a chain conveyor 5 in a feeder house 4, and then by a screw-type handling drum 7. Threshed.

The threshed grains fall from the receiving net 8 onto the oscillating sorting board 9 and are sorted by the blower fan 10 and the oscillating sorting board 9.

During this sorting process, grains and fine straw waste leak downward from the oscillating sorter, and only long straw is carried toward the dust outlet 11.

The spillage including grains that has fallen from the oscillating sorting board 9 is subjected to sorting air by a blower fan 12 like a winnowing machine, and the grains fall into the first gutter 13 and the second particles fall into the second gutter 14. The grains that have fallen into the trough 13 are carried to the paddy tank by a grain-lifting conveyor, and the second grains are returned to the swing sorting board 9 through the thrower tube 15.

16 is a crawler equipped with a thresher, 17
indicates the control section.

This proposal concerns the improvement of the reaping section of the combine harvester as described above.

That is, the driving portion of the cutting blade 2 is attached to the front frame 21a of the frame 21 of the platform 20 in which the scraping auger 3 is installed.

Therefore, to explain the structure of the cutting blade drive section, the fifth
In the figures through FIG. 8, a cylindrical cam 24 is spline-fitted to the shaft 23 of the pulley 22. As shown in FIG. The shaft 23 passes obliquely through the cylindrical cam 24 in the longitudinal direction, and an outer ring 25 is fitted onto the cylindrical cam 24 itself.

Support shafts 26, 2 provided on both upper and lower sides of the outer ring 25
6 is pivoted on the upper and lower sides of an arm 27 that surrounds an outer ring 25 that is octagonal when viewed from the front.

The arm 27 is fixed with a pin 30 to a reciprocating rotation shaft 29 mounted on the case 28.

A cutting blade drive arm 31, which is a swing lever, is fixed to the end of the shaft 29 protruding from the case 28, and one end of the arms 32, 32 is attached to a pivot 3 at the lower end.
3 has been done.

The other ends of the arms 32, 32 are pivoted to the operating shaft 34.
5, and the operating shaft 34 is attached to an operating plate 36 that is erected on the movable blade 2a.

Therefore, when the shaft 23 is driven by the pulley 22, the cylindrical cam 24 rotates, thereby causing the outer ring 2
5 moves left and right when viewed from the side. This causes the shaft 29 to rotate back and forth, causing the cutting blade drive arm 31 to move left and right like a pendulum.

Therefore, the mowing blade drive arm 31 moves the operating plate 36 left and right via the arms 32, 32, so the movable blade 2a moves relative to the fixed blade 2b,
There will be a reaping.

In the above-described device, as shown in FIG. 1, a bottom plate 39 that can be slid back and forth is provided at the front end of the frame 21 of the platform 20 where the scraping auger 3 is located, and this bottom plate 39 is moved forward. When sliding, a double-sided tap spacer 40 for longitudinal adjustment of the cutting blade is interposed between the front end of the front frame 21a and the downwardly bent edge 39a of the bottom plate 39.

A receiving blade mounting base 41 is attached to the bent edge 39a.
Further, the thickness S of the boss 31a is biased to one side so that the cutting blade drive arm 31 attached to the shaft 29 is extended forward by the thickness of the spacer 40.

Like the conventional one, the boss 31a is divided into two parts to form a flange as shown in FIG. 8, and is fastened to the shaft 29 with bolts and nuts 42.

Therefore, the distance L between the auger 3 and the cutting blade 2 as shown by the solid line in FIG.
When the auger 3 and the cutting blade 2 are turned over, the distance between the auger 3 and the cutting blade 2 as shown in FIG.

Since the cutting blade drive arm 31 is used upside down as described above, the shaft 29 is longer than usual.

In the illustrated example, the cutting blade drive arm 31 is used by turning it over, but the cutting blade driving arm 31 may be simply adjusted and attached by sliding it back and forth without turning it over.

In addition to the spacer shown in FIG. 1, a spacer such as shown in FIG. 2 may be used.

Now, when the distance between the auger 3 and the cutting blade 2 is a long distance like L, the spacer 40 is attached to the front end of the front frame 21a, the bottom plate 39 is extended to cover the top of the spacer 40, and the receiving blade mounting base is 41
is attached to this, and the cutting blade drive arm 31 is also attached in front of the shaft 29 as shown by a solid line.

This attachment condition is convenient for harvesting and harvesting long-culm crops.

That is, it is captured as shown in FIG.

Next, when the distance between the auger 3 and the cutting blade 2 is set to a short distance such as l, the spacer 40 is not removed, the bottom plate 39 is retracted, and the receiving blade mounting base 41 is attached to the front frame 21a. Mowing blade drive arm 31
is attached to the shaft 29 by retreating as shown in the imaginary line.

This attachment condition is convenient for harvesting and harvesting short-culm crops.

That is, it is captured as shown in FIG.

As described above, the present invention is characterized in that the distance between the auger and the cutting blade can be easily changed depending on the crop culm length or the intake culm length in order to improve reaping and intake performance.

[Brief explanation of the drawing]

Fig. 1 is a cutaway front view of the device of the present invention, Fig. 2 is a cutaway side view of a spacer according to another embodiment, and Figs.
The figure is an explanatory diagram showing the reaping and reaping conditions when the distance between the auger and the cutting blade is changed. FIG. 9 is a side view different from FIG. 7, and is an overall view of the full-feed type axial flow combine harvester. 1... Scraping reel, 2... Cutting blade, 3... Scraping auger, 4... Feeder house, 5... Chain conveyor, 6... Handling room, 7... Screw-type handling barrel, 20... platform, 21...platform frame, 39...bottom plate, 40...spacer, 41...blade mounting base, 31...mower blade drive arm, 29...mower blade drive shaft.

Claims (1)

[Scope of utility model registration request] In a full-feed combine harvester that is equipped with a feeder house and a scraping auger in front of the handling room where the handling barrel is installed, a replaceable fixed blade for adjusting the front and back position is installed on the front frame of the platform where the scraping auger is installed. The structure is such that the mower blade position can be extended by attaching a fixed blade mount via a spacer, and the attachment position of the cutting blade drive arm, which is a swing lever, relative to the reciprocating rotation axis is adjusted in accordance with the mower blade position. A cutting blade position changing device for a full-feed combine harvester that is configured to be extended to adjust the cutting blade position, thereby making it possible to change the distance between the scraping auger and the cutting blade (fixed blade and cutting blade).