JP2584231Y2 - Cutting blade mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a rotary cutting blade used for a straw cutter device such as a combine.

[0002]

2. Description of the Related Art Conventionally, a technique relating to a straw cutter device is known, for example, a technique disclosed in Japanese Utility Model Publication No. 4-10743. As shown in FIG. 11, the straw cutter device in this technology has a low-speed rotating blade 1 on a low-speed rotating shaft 13.
Are fixed at regular intervals, and the high-speed rotary blades 12 are arranged on the high-speed rotary shaft 13 at equal intervals. 12, the collars 15 are arranged on the shaft in order to keep the low-speed rotary blades 11 and the high-speed rotary blades 12 at constant intervals.

[0003]

In a conventional configuration in which a collar is interposed between rotary blades to determine the interval, the pitch of the rotary blade is determined by the length of the collar. Its length is fixed. For this reason, when changing the cutting condition or the cutting length of straw, it is necessary to adjust the gap between the low-speed rotating blade and the high-speed rotating blade, or to adjust the cutting pitch. After removing all the rotating blades and collars, it is necessary to replace them with the collars of the interval lengths to be changed, and attach them to the rotating shaft again to assemble them. Therefore, since all of the low-speed rotary blade and high-speed rotary blade are assembled, the work becomes very troublesome,
Further, since the straw cutter device is disassembled from the combine body and the rotary shaft is taken out freely, adjusting the pitch of the rotary blade requires a considerable amount of time and effort.

[0004]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, the low-speed rotation axis and the high-speed rotation axis are horizontally laid on the frame in parallel, the rotation blades are arranged on each rotation axis at regular intervals, and the rotation blades on both rotation axes are alternately arranged to face each other. In the cutter device, the rotating blades are slidably fitted in the axial direction on the rotating shaft, and a spring is interposed between the respective rotating blades and the rotating blades are biased in a spreading direction to adjust the interval, Lock nuts are arranged on both sides on the rotating shaft so that the rotating blades on both sides can be fixed at arbitrary positions.

[0005]

Next, the operation will be described. The springs 6, 6 ... are interposed between the rotary blades, and the intervals between the rotary blades are adjusted by the biasing force of the springs 6, 6 ... The lock nut 10 on one side of the rotating shaft
By loosening and moving the rotating blade 10, the interval between the rotating blades can be adjusted, and the lock nuts 10 and 10 on either side of either the low-speed rotating shaft 3 or the high-speed rotating shaft 4 can be loosened, and the rotating blade and the rotating blade can be adjusted. The gap between the low-speed rotary blade 1 and the high-speed rotary blade 2 can be adjusted by performing the parallel movement without changing the distance between the blades.

[0006]

Next, an embodiment of the present invention will be described. 1 is an overall plan view of the combine, FIG. 2 is a plan cross-sectional view of the straw cutter device, FIG. 3 is an enlarged cross-sectional view of the same, FIG. 4 is an enlarged cross-sectional view showing a state where the interval between the rotary blades is reduced, and FIG. 6 is a front view of the rotary blade, FIG. 6 is a bottom view thereof, FIG. 7 is a sectional view taken along the line XX in FIG. 5, FIG. 8 is a front view of the rotary blade without the bracket, and FIG. FIG. 10 is an enlarged view and FIG.

In FIG. 1, a cutter device A of the combine is disposed at the rear of the fuselage. The harvesting / transporting device B lays out and raises the cereal culm, cuts the root of the cereal culm, and conveys it backward. Paddy or straw waste that has been threshed by the threshing device C and leaked through the receiving net provided at the lower part of the handling cylinder is sorted by the sorting device, and the fine granules are stored in the Glen tank 17, and the straw waste and the like are moved backward. The straw that has been carried out and threshed by the threshing device C is conveyed backward by a straw chain, cut by the cutter device A, and discharged onto the field scene.

As shown in FIGS. 2 and 3, the cutter device A has a low-speed rotating blade 1, 1,.
Are rotatably mounted horizontally via a bearing, and a high-speed rotary shaft 4 supporting the high-speed rotary blades 2,... Is rotatably mounted on the rear side via the bearing. The low-speed rotation shaft 3 is disposed in parallel at a position slightly higher than the high-speed rotation shaft 4, and power is transmitted by a pulley (not shown), and the gears fixed on the low-speed rotation shaft 3 and the high-speed rotation shaft 4 mesh with each other. To rotate in opposite directions.

Since the low-speed rotary blade 1 and the high-speed rotary blade 2 and the low-speed rotary shaft 3 and the high-speed rotary shaft 4 have the same configuration,
The low-speed rotary blade 1 and the low-speed rotary shaft 3 will be described in detail with reference to FIG.
As shown in FIG.
A square hole 1a (hexagon in this embodiment) similar to the outer shape of the above is opened, a boss 1e is inserted into the square hole 1a, a low-speed rotating shaft 3 is inserted into the boss 1e, and a low-speed rotating blade 1.1 is formed. Are slidable on the low-speed rotary shaft 3, and the low-speed rotary shaft 3 is formed of a square bar so that the low-speed rotary blades 1, 1,...

As shown in FIGS. 9 and 10, saw blades 1b are formed on the circumference of the low-speed rotary blade 1, and one of the saw blades 1b is used in this embodiment. Then the circumference is 120
In addition, the tip is bent in a “く” shape in a sectional view, and the tip surface 1c on the bent side is polished to a pointed shape so that the tip is sharp and sharp. Then, several (6 in this embodiment) fixing holes 1d, 1d are placed on a concentric circle substantially at the center of the circumference of the low-speed rotary blade 1 and the circumference.
Are opened at equal intervals.

As shown in FIG. 7, brackets 5a and 5b are adhered to both sides of the low-speed rotary blade 1 (or the resin is poured into the mold by inserting the low-speed rotary blade 1). And the brackets 5a and 5b are integrally formed, and a cylindrical concave portion 5c is provided on the upper surface of the bracket 5a.
Are formed at equal intervals (six places in the present embodiment) on a concentric circle, and the compression spring 6 can be inserted into the recess 5c.

As shown in FIGS. 2 and 3, threaded portions 3a are formed at both ends of the low-speed rotating shaft 3, and the low-speed rotating blades 1.1 are formed on the low-speed rotating shaft 3 formed in a square bar. .. are inserted, and the recesses 5c, 5c,.
, Each of which is fitted with a spring 6, 6... And is urged in a spreading direction.
7, the receiving body 7.7 is fitted around the tip of the collar 9.9, and the other end of the collar 9.9 is connected to the lock nut 10.1.
.. Are maintained at the same position on the low-speed rotating shaft 3 at the same position. Are also slidable on the high-speed rotary shaft 4 similarly to the low-speed rotary shaft 3, and are externally fitted at the same intervals as the low-speed rotary blades 1, 1,. Thus, the low-speed rotary blades 1 and the high-speed rotary blades 2 are alternately arranged facing each other.

In such a configuration, when it is desired to change the cutting length (cutting pitch L1) of the straw, one of the lock nuts 10 is loosened and moved in the axial direction to move the low-speed rotary blade 1 and the low-speed rotary blade 1. Adjust the interval of 1. .. Are interposed between the low-speed rotary blades 1 and the low-speed rotary blades 1. And the low-speed rotary blade 1 are adjusted so as to have an equal interval.
Can be adjusted from the position where the boss extends to the position where the boss 1e contacts the boss 1e shown in FIG. Similarly, the interval between the high-speed rotary blade 2 and the high-speed rotary blade 2 is
・ Adjust so as to be the same as the interval of 1 ... and lock it with lock nuts 10 ・ 10.

When adjusting the gap (L2) between the low-speed rotary blade 1 and the high-speed rotary blade 2 for adjusting sharpness or the like, one of the low-speed rotary shaft 3 and the high-speed rotary shaft 4 is adjusted. The gap between the low-speed rotary blade 1 and the high-speed rotary blade 2 can be adjusted by loosening the lock nuts 10 on both sides of the rotary shaft and moving the rotary blades in parallel without changing the interval between the rotary blades. .

[0015]

[Effects of the Invention] The present invention is constructed as described above, and has the following effects. In other words, when adjusting the pitch of the rotary blade in the disk cutter, there is no need to replace and replace the collar with a different collar length as in the past, just loosen the lock nut and adjust its position. This makes it possible to change the pitch of the rotary blade, so that it is not necessary to arrange a large number of collars, and the work can be performed in a short time with a simple operation without disassembling. In addition, opposed rotating blade (cutting blade)
Adjustment of the gap between the rotary blade (receptor blade) and the rotary blade (receiving blade) can be easily performed simply by loosening the lock nut on one shaft and moving the rotary blade in parallel.

[Brief description of the drawings]

FIG. 1 is an overall plan view of a combine.

FIG. 2 is a plan sectional view of the straw cutter device.

FIG. 3 is an enlarged sectional view of the same.

FIG. 4 is an enlarged cross-sectional view of a state in which the interval between the rotary blades is reduced.

FIG. 5 is a front view of the rotary blade.

FIG. 6 is a bottom view of the same.

FIG. 7 is a sectional view taken along the line XX in FIG. 5;

FIG. 8 is a front view of the rotary blade excluding a bracket.

FIG. 9 is an enlarged view of a tip portion of the rotary blade.

FIG. 10 is a side sectional view of the same.

FIG. 11 is a plan view of a conventional cutter device.

[Explanation of symbols]

 A Cutter device 1 Low-speed rotating blade 2 High-speed rotating blade 3 Low-speed rotating shaft 4 High-speed rotating shaft 6 Spring 10 Lock nut

Claims (1)

(57) [Scope of request for utility model registration] 1. A low-speed rotating shaft and a high-speed rotating shaft are horizontally laid on a frame in parallel, rotating blades are arranged at regular intervals on each rotating shaft, and rotating blades on both rotating shafts are alternately opposed to each other. In the cutter device to be arranged, the rotary blades are slidably fitted in the axial direction on the rotary shaft, and a spring is interposed between the rotary blades to urge the rotary blades in the direction in which the rotary blades expand so that the intervals are increased. A cutting blade mounting structure characterized in that the rotary blades on both sides of the rotating shaft are arranged and lock nuts are arranged so that the rotating blades on both sides can be fixed at arbitrary positions.