JPH0125547Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a so-called rear discharge type mower that discharges grass clippings backward.
The purpose is to improve the release and dispersion of grass clippings.

2. Description of the Related Art There is a rear discharge type mower, which is attached to the abdomen of a mobile agricultural machine, such as a tractor, and discharges grass clippings cut by a cutting blade rotating around a vertical axis to the rear.

This type of mower is advantageous in terms of accelerating drying because it can discharge grass clippings in a band shape corresponding to the cutting blade body, compared to mowers that discharge grass clippings only to one side.

However, in the conventional device, as shown in FIG. 8, the guide plate 22' extends vertically downward from the lower surface of the top plate 19' of the mower deck. As a result, as shown by the broken line in the figure, the grass clippings G' are not spread evenly and are collected in a mound at the discharge end, resulting in poor grass clipping discharge properties and the formation of so-called streaks in the mowing marks. .

The purpose of the present invention is to solve the problems of the conventional rear discharge discharge type mower, and its features include the top plate 19 of the mower deck 10.
A plurality of cutting blade bodies 7 that are rotatable around a vertical axis are arranged horizontally below the blade body 7, and there is a guide plate 22 for discharging and guiding the grass clipped by each of the cutting blade bodies 7 to the rear.
In the mower 6 provided on each side of each cutting blade body 7 so as to extend downward from the top plate 19, the discharge end portion of the guide plate 22 extending from the middle to the rear end in the longitudinal direction It is bent to move away from the blade body 7 laterally, and the surface of the bent part facing the corresponding cutting blade body 7 is bent downward as it moves away from the corresponding cutting blade body 7 laterally. It is characterized in that it is an inclined surface 25 facing toward the surface.

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

In FIG. 1 showing the overall configuration, 1 is a mobile agricultural machine shown as a tractor, and a mower 6 is fixed to a vehicle body 4 between front wheels 2 and rear wheels 3 via a parallel quadruple link mechanism 5, so that it can be raised and lowered. The cutting blade body 7 of the mower 6 is rotatable about the vertical axis by receiving power from the front power extraction device 8 of the mobile agricultural machine 1 via the transmission shaft 9 and the like.

Referring to FIGS. 2 to 4, the mower 6 has a plurality of cutting blade bodies 7, three in this example, on a mower deck 10.
The cutting blade bodies 7 are arranged in parallel in the horizontal direction, and each cutting blade body 7 is rotatable in the direction of arrow A in FIG.

A pair of left and right gauge wheels 12 are provided on both sides of the front portion of the mower deck 10 via arms 11, and a limit gauge wheel 14 is provided at the center between the gauge wheels 12 via a bracket 13.

Further, limit gauge wheels 16 are provided on both rear sides of the mower deck 10 via brackets 15, and each of the limit gauge wheels 16 is covered with a safety cover 17. In this example, each of the safety covers 17 can be adjusted and fixed in the front-rear direction using the elongated holes 18A and the bolts 18.

The mower deck 10 is made of sheet metal, for example, and includes a top plate 19, side plates 20 fixed to both left and right ends of the top plate 19, and a front side plate 21 fixed to the front end of the top plate 19, and the rear end is formed into an open part. ing.

Guide plates 22 are fixed to the lower surface of the top plate 19 to guide the discharge of grass clipped by the cutting blade bodies 7 to the rear, and the guide plates 22 surround the outer periphery of the rotation locus of each of the cutting blade bodies 7. It has a planar arc portion 23 and a linear guide portion 24 that circumscribes the arc portion 23 concentrically with the rotation locus of the cutting blade body 7, and each of the linear guide portions 24 in this example The discharge is guided in the direction of arrow B in the figure.

As shown in FIG. 3, each of the guide plates 22 has its lower edge positioned above the lower edges of the side plates 20 and the front plate 21. As shown in FIGS. 3 and 5, a middle 22A of each guide plate 22 in the longitudinal direction
The discharge end portion extending from the rear end to the corresponding cutting blade body 7
It is bent along the bent edge 22B so as to move away from the side laterally. The surface of this bent portion facing the corresponding cutting blade body 7 is an inclined surface 25 that faces downward as it moves away from the corresponding cutting blade body 7 laterally.

Incidentally, the arcuate portion 23 of the guide plate 22 is formed with a vertically curved portion 23A as shown in FIG.

In addition, in the figure, 26 is a mounting bracket for the parallel four-link mechanism 5, and 27 is a mounting seat for the transmission mechanism.A transmission case 28 having a wrap-around transmission mechanism shown in FIG. 1 is attached to this mounting seat 27, and each The cutting blade body 7 is rotated in the direction of arrow A.

Next, the effect will be explained.

Reaping work is performed by traveling the mobile agricultural machine 1 and rotating each cutting blade body 7 in the direction of arrow A with the cutting height adjusted by the gauge wheels 12 and limit gauge wheels 14 and 16. , the grass clippings are discharged along the guide plate 22 in the direction indicated by arrow B.

That is, in this example, the number of grass clippings cut by each cutting blade body 7 is 3.
It is rear-discharged as a strip of rows.

This rear discharge type mower, like the mower M shown in FIG. 6, discharges the grass clipped by the cutting blade C to one side through the discharge path D as shown by the arrow E. It is advantageous to accelerate drying because it disperses the grass clippings, and in addition, in the mower M shown in FIG. Even if the discharge from the lower front end is prevented, the discharge direction of the grass clippings is in the so-called grass collecting form, which is disadvantageous in terms of accelerating drying. However, it is advantageous to use the rear discharge type as in this embodiment. It becomes.

In addition, even in the case of a rear discharge type mower, a blowing plate may be provided on the cutting blade body 7, but the grass clippings are moved to the guide plate 2 by the centrifugal force of the cutting blade body 7.
2, and some of the grass clippings will be concentrated at the discharge end. However, since the guide plate 22 is bent at the discharge end to form a slope 25, the grass clippings G will not flow as shown in Fig. 5. The grass clippings G' are dispersed as shown by the broken lines, and the grass clippings G' are not concentrated in a bulge unlike the conventional one in FIG. This improves mowing efficiency and prevents streaks from forming on the mowing marks.

According to the present invention, the grass clippings cut by the cutting blade body 7 are discharged backward independently by the guide plate 22, resulting in a windrow with a band-like distribution form, which accelerates drying, and the discharge end of the guide plate 22 is Since the sloped surface 25 is used, it is possible to achieve a band-like dispersion pattern even more effectively, improve the release of grass clippings, improve cutting efficiency without creating so-called streaks, and make a good mowing mark. There are advantages.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 shows the overall configuration, Fig. 2 is a plan view showing the mower, in particular, the mower deck, Fig. 3 is a side sectional view taken along line XX in Fig. 2, and Fig. 4. is a rear view of FIG. 2, FIG. 5 is a back sectional view of the discharge end of the guide plate, FIG. 6 is a schematic plan view of the conventional mower, FIG. 7 is an enlarged cross-sectional view taken along the Y-Y arrow in FIG. The figure is a back sectional view of a conventional guide plate discharge end. 6... Mower, 7... Cutting blade body, 10... Mower deck, 22... Guide plate, 25... Tapered surface.

Claims (1)

[Scope of utility model registration request] Below the top plate 19 of the mower deck 10, a plurality of cutting blade bodies 7 that are freely rotatable around a vertical axis are arranged in parallel in the horizontal direction, and a guide plate 22 that guides and discharges grass clippings cut by each of the cutting blade bodies 7 rearward. However, in the mower 6 provided on the sides of each cutting blade body 7 and extending downward from the top plate 19, the guide plate 22
The discharging end portion extending from the middle in the longitudinal direction to the rear end is bent so as to be separated from the corresponding cutting blade body 7 laterally, and the surface of this bent portion facing the corresponding cutting blade body 7 is an inclined surface 25 which faces downward as it moves away from the corresponding cutting blade body 7 laterally.