JPS6019552Y2 - Straw cutting device for threshing machine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a straw cutting device for a threshing machine such as a combine harvester, and allows the cutting size of the straw to be changed depending on the purpose of use.

By the way, in a threshing machine such as a combine harvester, the waste straw is used for various purposes, such as cutting the threshed waste straw into short pieces with a cutter and then releasing it into the field, or releasing it in the form of long straw without cutting it. However, in the past, when cutting straw with a cutter, it was customary to not be able to change the cutting dimensions, which narrowly limited the uses of waste straw1. For those that allow dimensions to be changed, the structure is complicated, and when changing the cutting dimension, the shaft supporting the rotary blade for long and short bath cutting is connected to the central rotating shaft, along with interlocking gears and support arms. This required a troublesome and dangerous operation such as rotating them and positioning one of them below the straw receiving port.

(Japanese Utility Model Publication No. 52-168861) The straw cutting device of the present invention was developed in view of the above-mentioned circumstances, and includes a cutter for short lengths in which multiple rotary blades are arranged at narrow intervals, and a cutter for short lengths in which multiple rotary blades are arranged at wide intervals. A cutter for long lengths and a dual-purpose cutter with rotating blades corresponding to the double-force vines are arranged in parallel, and the straw is placed between the short and dual-purpose cutters or between the dual-purpose and long-purpose cutters. The short and dual purpose cutter and the dual purpose and long size cutter are each rotated in a predetermined direction by the changing operation of the drop position changing member. By interlocking the switching of each drive system for long lengths, the cutting dimensions can be easily changed depending on which set of cutters is used when cutting and discharging waste straw. The processing conditions of the waste straw can be changed in various ways depending on the purpose of use, including the case where the waste straw is released in the form of long straw.

This will be explained below using the example shown in the figure.
In the figure, reference numeral 1 denotes a removal section of a combine harvester, etc., 2 a straw cutting device disposed behind it, 3 a chain for conveying waste straw to the device, and 4 a case of the device.

5, 6.7 are three cutters arranged in parallel within the case, and have rotating shafts 5a, 6a, ?, respectively. A has a configuration in which a plurality of disk-shaped rotary blades 5b, 6c, and 7b are arranged, but the cutter 5 placed at the front is a short cutter with narrow spacing between the rotary blades 5b, and the cutter 5 placed at the rear is a cutter for short lengths. The cutter 7 is a long-dimension cutter in which the rotary blades 7b are disposed at wide intervals, and the cutter 6 placed in the middle corresponds to each rotary blade 5b of the short-dimension cutter, and the cutter 6 is a long-dimension cutter that corresponds to each of the rotary blades 5b of the short-dimension cutter. Rotary blade 7
It is a dual-purpose cutter with a rotary blade 6b arranged so as to correspond to b.

8, 9, and 10 are gears 11, 12 that are fitted onto the rotating shafts 5a, 6a, and 7a of each cutter, respectively, and are meshed with each other in sequence.
are the rotating shafts 5a, 6a, 7a of the short and long cutters.
A belt 15 is connected between both pulleys and the driving pulley 13, 14 shown in FIG.
．． 16 is wound, thereby configuring a short drive system A and a long drive system B.

Here, the driving pulley 13 for short lengths rotates in the direction a, and the driving pulley 14 for long lengths rotates in the opposite direction b, and the belts 15 and 16 rotate between the original and driven pulleys. Been in a relaxed state.

Reference numeral 17 denotes a drive system switching member that selectively puts the circumferential drive systems A and B into a power transmission state, and by swinging about a fulcrum 17', tension pulleys 17a and 1 at both ends are switched.
7b is adapted to tension either of said belts 15,16.

Reference numeral 18 denotes a straw dropping position changing member disposed parallel to the chain 3, which is held in the cylindrical body 19 and biased by a spring 20 in the direction of protruding from the cylindrical body, and is driven by a wire 21. It is interlocked with the system switching member 17, and when the switching member swings in the force direction, it is moved backward against the spring 20, and the tip 18a is positioned above the overlapping part of the short-cut cutter 5 and the dual-purpose cutter 6. When the switching member 17 swings in the direction b', it is caused to protrude by the spring 20, so that the tip 18a is positioned above the overlapping portion of the dual-purpose cutter 6 and the long-use cutter 7.

Here, openings 4a and 4b are provided above the overlapping portion of each cutter in the case 4, and 22 is a cover for opening and closing the latter opening 4b, and 23 is a cover for the cutting device 2.
It is a dropper installed at the rear of the.

According to the above configuration, when the drive system switching member 17 is swung in the direction a' by an appropriate operation, one tension pulley 17a in this member presses and tensions one belt 15, thereby causing short-size The drive system A is in a transmission state, and the short-cut cutter 5 and the dual-purpose cutter 6 are rotated in the directions shown by the solid arrows via the gears 8 and 9, and are moved to the falling position in conjunction with the swinging of the member 17. The tip end 18a of the changing member 18 is positioned above the overlapping part of the short and dual purpose cutters 5 and 6, so that the waste straw conveyed from the threshing section 1 by the chain 3 is transferred to the short size cutter 5. and each rotary blade 5 of the dual-purpose cutter 6
b and 6b, it is cut into short pieces corresponding to the spacing between them.

Furthermore, when the switching member 17 is swung in the b' direction, the long-dimension drive system B similarly becomes a transmission state, and the dual-purpose cutter 6 and the long-dimension cutter 7 are rotated in the direction of the dotted arrow. At the same time, by positioning the tip 18a of the falling position changing member 18 above the overlapping part of the dual-purpose and long cutter 6.7, the straw removal corresponds to the spacing between the rotary blades 7b of the long cutter. It is cut into long pieces.

Furthermore, the tip 18a of the falling position changing member is cut with a dual-purpose cutter 6.
If the opening 4b is closed with the cover 22 while the cutter 7 for long lengths is positioned above the overlapping part, the waste straw will fall onto the cover and be supplied to the dropper 23 at the rear, thereby cutting the straw. In other words, the waste will be released in the form of a long straw without being released.

In addition, Fig. 3 shows the drive system A' for short lengths and the drive system B' for long lengths.
This shows an embodiment in which the motive power boops IJ-13' and 14' are disposed coaxially, and in this embodiment, the motive pulley shaft 24 is switched by appropriate operation or in conjunction with the operation of the drive system switching member 17'. The direction of rotation is switchable.

As described above, the straw cutting device of the present invention threshing machine is equipped with a short cutter and a long cutter with rotary blades arranged at different intervals, and a dual-purpose cutter placed between them. A falling position changing member is provided for selectively dropping the cutter between the short and dual use cutters or between the dual use and long length cutters, and the short and dual use cutter and the dual use and long length cutter are respectively predetermined. A drive system switching member is provided for switching each drive system for rotation in the direction, and each switching operation of the switching member and the drop position changing member is linked. The cutting dimensions of straw can be easily changed, and unlike conventional methods, the switching operation can be performed simply, quickly, and safely. This makes it possible to process the waste straw into three different states, thereby expanding the uses of the waste straw or processing the waste straw in a state most suitable for the purpose of use.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the main parts of one embodiment of the straw cutting device of the present invention, FIG. 2 is a side view of the same, and FIG. 3 is a side view of the main parts of another embodiment. 2 is a straw cutting device, 5 is a cutter for short lengths, 6 is a dual-purpose cutter, and 7 is a cutter for long lengths 5b, 6b. 7b is a rotary blade, 17 is a drive system switching member, 18 is a drop position changing member, A is a short drive system, and B is a long drive system.

Claims (1)

[Scope of utility model registration request] Three cutters with multiple rotary blades arranged on the shaft are arranged in parallel, with the cutter placed at the -' end, the cutter for short lengths with narrower spacing between the rotary blades, and the cutter placed at the other end. The cutter is a long cutter with rotating blades arranged at a wide interval, and a cutter placed in the middle is a dual-purpose cutter with rotating blades arranged corresponding to each of the rotating blades of the dual-purpose cutter,
A dropping position changing member is provided for selectively dropping the waste straw between the short-length cutter and the dual-purpose cutter, and between the dual-purpose cutter and the long-purpose cutter, and further rotates the short-length and dual-purpose cutters in a predetermined direction. A drive system switching member is provided for switching between a short-length drive system and a long-length drive system that rotates a dual-purpose and long-length cutter in a predetermined direction, and the switching operation of the member and the straw falling position changing member are changed. A straw cutting device for a threshing machine characterized by interlocking operations.