JPS606198Y2 - Disc-shaped stem culm shredding device - Google Patents

Description

[Detailed description of the invention] The present invention is mainly a device that is installed on a combine harvester and shreds the threshed waste straw. This invention relates to a disk-shaped stem culm shredding device in which two types of blade groups are alternately positioned and fixed, and two rotating shafts are provided in parallel positions with an appropriate interval between them.

Conventionally, as this kind of disk-shaped stem culm shredding device, the large-diameter blades of the two rotating shafts are moved by moving one of the two rotating shafts in a distance direction with respect to the other rotating shaft. A first state in which the cutting action parts of the large diameter blade and the cutting action part of the small diameter blade of both rotating shafts overlap and are located in close proximity to each other to cut the stem culm into a long length. There is a device that can be switched to a second state in which the stem culm is cut into short lengths, but in this case, the length of the cutting size is changed by relative distance movement of the two rotating shafts. Therefore, it is necessary to incorporate a mechanism for absorbing the variation in the distance between the two rotating shafts into the transmission mechanism for synchronizing and interlocking the two rotating shafts, which makes the entire transmission structure complicated and large. There was an easy problem.

In view of the above-mentioned circumstances, the purpose of this invention is to simplify and make the power transmission structure more compact, while at the same time making it possible to change the stem culm cutting size into two stages: long and short. In the officially registered one, at least one of the two rotating shafts is slidably movable in the direction of the rotating shaft, and the sliding movement causes the cutting action of the large-diameter blade of both rotating shafts. A first state in which the cutting portions of the large-diameter blade and the cutting portion of the small-diameter blade of both rotating shafts overlap and are positioned close to each other to cut the stem culm into a long length; Specifically, in the case of the present invention, the above-mentioned By configuring the system to switch between the two states, it is no longer necessary to provide a special mechanism in the transmission mechanism provided between the two rotating shafts to absorb changes in the distance between the two rotating shafts, as in conventional devices. The cutting size of the stem culm can be changed to two stages, long and short, while simplifying and compacting the transmission structure.

Further, in the case where a shredding stem culm scraping body is attached to the large diameter blade on the side of one of the two rotating shafts, in the first state, the cutting by the large diameter blade Since the shredded stalk culm can be scraped off at the same time as the action, there is an advantage that variations in cut dimensions caused by the shredded stalk culm being further cut by the small-diameter blade can be suppressed.

Hereinafter, an embodiment of the present invention will be described based on the drawings.A pair of rotating shafts are driven and rotated in opposite directions via deceleration gears 2A and 2B across the left and right side plates IA and IB of the cutter cover 1. 3 and 4 are installed parallel to each other at an appropriate interval, and groups of two types of disc-shaped blades 5 and 6 with different diameters are attached to both rotation shafts 3 and 4, respectively, alternately in the direction of their rotation axes. The low-speed rotary shaft 4 of the two rotary shafts 3 and 4 can be slid and fixed in the direction of its rotational axis, and the Due to dynamic movement, the large diameter blade 5 of both rotating shafts 3.4
. The stem culm is configured to be switchable to a second state in which the stem culm is cut into short lengths in which the stem culm and the stem culm are positioned close to each other and overlap each other.

Moreover, the rotation axis 3 between the adjacent large-diameter blade bodies 5 and small-diameter blade bodies 6
, 4, a spacer member 7 for regulating the spacing in the direction of the rotational axis between the double blade bodies 5 and 6 groups is externally fitted and fixed, and the double blade body 5 on the low speed rotating shaft 4 side , 6 are attached with two types of stem culm scraping bodies 8 and 9 having different diameters.

FIG. 3 shows an example of a sliding operation structure for the low-speed rotating shaft 4, which is constructed as follows.

That is, the passive gear 2B is located near the end of the front low-speed rotating shaft 4.
The bearing having the flange 10 is fitted with a spline so that the member 11 can slide freely, and the bearing 13 is interposed between the inner end of the member 11 and the bracket 12 fixed to the side plate IB. Fixing nut 14.14
At the same time, the bearing has male threaded portions 11A and 4A in the same direction and pitch at the outer end of the member 11 and the end of the low-speed rotating shaft 4, and both male threaded portions 11
One stepped nut 15 is screwed over A and 4A.

Then, with the bearing member 11 and the stepped nut 15 unscrewed, the bearing is connected to the low speed rotating shaft 4 by the member 1.
By sliding in the direction of the rotational axis relative to 1,
It is possible to switch between the two states mentioned above, namely the long cutting state and the short cutting state.

It should be noted that the configuration may be such that both of the rotating shafts 3 and 4 are slidably moved in the direction of the rotational axis to switch between the two states.

[Brief explanation of the drawing]

The drawings illustrate an embodiment of the disc-shaped stem culm shredding device according to the present invention, and FIGS. 1 and 2 are cross-sectional views showing a long cutting state and a short cutting state, and FIG. 3 shows the main part. FIG. 3.4...Rotating shaft, 5...Large diameter blade body,
6...Small diameter blade body, 8...Stem culm rake body.

Claims (1)

[Claims for Utility Model Registration] ■ Two rotating shafts in which two groups of blades 5 and 6 with different diameters are alternately positioned and fixed at a fixed interval in the direction of their respective rotational axes. In a disc-shaped stem culm shredding device in which the shafts 3 and 4 are arranged parallel to each other at an appropriate interval, at least one of the two shafts 3 and 4 is set in the direction of the axis of rotation. a first state in which the cutting portions of the large-diameter blades 5.5 of both rotating shafts 3, 4 overlap each other and come into close proximity to each other and cut the stem culm in a long length; The cutting action part of the large diameter blade 5 and the cutting action part of the small diameter blade 6 of both rotating shafts 3.4 are positioned close to each other and can be switched to a second state in which the stem culm is cut into short lengths. A disk-shaped stem culm shredding device characterized by: ■ One of the two rotating shafts 3 and 4, one of the rotating shafts 4 or 3
The disk-shaped stem culm shredding device according to claim 1, wherein at least the large-diameter rotary blade 5 on the side is provided with a stem culm scraping body 8.