JPH0338997Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a wind guide structure for a mowing device that collects grass cut by a mower into a grass collecting box.

(Prior art) As a grass cutting device, a mower is attached to the abdomen of a traveling vehicle body such as a tractor, a grass collecting box is attached to the rear part, and the grass cut by the mower is sucked up by a suction mechanism through a chute. There is one that collects grass.

This mowing device has a discharge port formed on one side of the mower, and discharges the cut grass from the discharge port using wind raising blades formed on the cutter. While changing the flow direction backwards, the grass is guided through the chute hose to the grass collecting box.

In a mower, the front surface of the mower deck is generally mountain-shaped in plan view, and the wind generated by the plurality of cutters flows along the mountain-shaped front surface and reaches the outlet.

Incidentally, the mower is sometimes used alone without being combined with a grass collection box, so the discharge port is formed wide so that the grass clippings can be evenly distributed to the sides of the mower, and the front surface of the mower deck in the vicinity is It is only slightly tilted backwards.

(Problem that the invention aims to solve) For this reason, the boot part of the chute used to combine the grass collection box with the mower is curved with a small curvature because it is necessary to change the direction of the sideways wind backwards. The corners of the boot section (indicated by phantom lines in Figure 1) may become clogged with grass clippings, creating wind flow resistance and making the wind speed inside the boot section uneven. Difficult to guide.

(Means for solving the problem) The present invention provides a curved boot portion 2 of the chute 26.
7 is provided with a wind guide section 32 that is inserted into the discharge port 8a of the mower 7 and smoothly guides the discharged wind toward the boot section 27, thereby all the problems of the prior art described above can be solved. This is something that can be solved.

That is, the specific structure of the problem-solving means of the present invention is characterized by the mower 7 and grass collecting box 15 attached to the traveling vehicle body 1, and the grass cut by the mower 7 being transferred to the grass collecting box by air flow. 15, and a chute 26 for transferring the mower 7 to the discharge port 8 of the mower 7.
In a mowing device in which a curved boot portion 27 of a chute 26 is connected to a, the boot portion 27 has a vertical wall-shaped wind blower inserted into the discharge port 8a and arranged closer to the cutter 9 than the front surface 8c of the mower deck 8. A guide portion 32 is provided, and the front end 32a of this wind guide portion 32 is located approximately in front of the center of the outlet side cutter 9 and is in close contact with the front surface 8c of the mower deck. 8c and is connected to the outer circumferential wall 31 of the boot portion 27.

(Function) The wind generated by the wind blowing plates 9a of the plurality of cutters 9 flows along the substantially mountain-shaped front surface 8c of the mower deck 8 while containing the grass cut by the cutters 9, and is discharged from the outlet. From the front of the center of the cutter 9 on the side 8a, it is guided by the vertical wall-shaped wind guide part 32 inserted into the discharge port 8a, and the direction is changed backward more than the front side of the mower deck 8c.
It is introduced into the boot portion 27 of the chute 26. Since the direction of the wind is sufficiently changed backward and diagonally before reaching the inside of the boot section 27, the wind flows inside the boot section 27 while curving with a large curvature, and flows in the direction necessary to feed the grass to the grass collecting box 15. You will be guided.

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

1 to 6, reference numeral 1 denotes the body of a small tractor, which has a front wheel 2 and a rear wheel 3.
A rear wheel fender 4 is provided correspondingly. 5
is a steering wheel, and 6 is a driver's seat.

Reference numeral 7 denotes a mower, which is attached to the lower abdomen of the vehicle body 1 via a hanging mechanism, and consists of three sets of cutters 9 rotatably arranged below the mower deck 8, and the cut grass is formed into the cutters 9. The air is discharged from the outlet 8a on the right side of the mower deck 8 by the action of the air buff plate 9a. Limit gauge wheels 10 are attached to the left and right front ends and the center of the mower deck 8, and height adjustment gauge wheels 12 are attached to the left and right rear ends.

Reference numeral 15 denotes a grass collecting box, which stores the grass cut by the mower 7, and is detachably attached to the rear of the vehicle body 1.

The grass collection box 15 includes a frame 16 located at the front lower part of the grass collection box 15, a pair of left and right plate-shaped mounting bodies 17 protruding forward from the frame 16, and the frame 16.
A grass collecting box main body 18 and a lid body 19 are fixedly installed on the rear side.
etc. The mounting body 17 is mounted on the rear part of the vehicle body 1 via a mounting base 20. Grass collection box body 18
Mainly constitutes the grass collecting box 15, and the rear upper side wall portion is made of a net.

Reference numeral 22 denotes a suction mechanism disposed on the side of the grass collecting box 15, which is mounted on the frame 16 or the tractor body 1, and is composed of a blower 23 and a drive device 24 such as an engine for driving the blower 23. A discharge port of the blower 23 is connected to the grass collection box 15 via a hose 25,
The suction port is connected to the discharge port 8a of the mower 7 via the chute 26.

The chute 26 is the outlet 8 of the mower deck 8.
The boot part 27 has a boot part 27 that is detachably attached to the blower 23, and a duct part 28 that connects the boot part 27 and the blower 23. It has a curved shape to guide the wind while changing its direction backwards.

The deck upper wall 8b of the discharge port 8a is inclined upward to the side, and the mounting portion 30 of the boot portion 27 is fitted to the rear portion of the deck upper wall 8b and is attached via a fastener. As shown in Figure 2,
It is formed upwardly along the deck upper wall 8b so that the amount of protrusion from the mower deck 8 is smaller than if it were formed horizontally.

In addition, the boot part 27 has a cross-sectional shape of the mounting part 30 which is a rectangular shape close to a circle (as shown in FIG.
The outer circumferential wall 31' of the conventional boot section shown by the phantom line in FIG. It has a curve with a larger curvature than the curve.

The mower 7 is attached to the boot portion 27 from the mounting portion 30.
A wind guide portion 32 is formed on the side. This wind guide part 32 is on an extension of the outer peripheral wall 31,
It is inserted into the discharge port 8a and has the shape of a standing wall placed closer to the cutter 9 than the front surface 8c of the mower deck 8, and its front end 32a is close to the front surface 8c, and the center of the cutter 9 on the discharge port 8a side. It is located almost immediately in front of. The front surface 8c of the mower deck 8 is slightly inclined to the side and rear, but the wind guide part 32 is inclined more to the side and rear, and the wind discharged from the outlet 8a is directed to the duct part by making the outlet smaller. 2
I will guide you inside 8. Reference numeral 36 denotes a vacuum plate that guides the wind behind the cutter 9, and the wind guide section 32 overlaps with the vacuum plate 36 in the left-right direction.

Further, a downward wind guide section 33 is formed on the mower side of the mounting section 30 of the boot section 27, and an extension line 33a of this downward wind guide section 33 is connected to the outlet side cutter 9.
With an arc shape along the rotation locus of the outer end of the cutter 9
located close to and slightly below it,
It is formed so that the wind raised by the wind blowing plate 9a is taken into the boot portion 27 more reliably without being allowed to escape.

Reference numeral 35 denotes a rear wind guide portion in the form of an upright wall, which prevents wind from escaping from the rear of the outlet 8a.

The wind guide section 32, the down wind guide section 33, and the rear wind guide section 35 are integrally molded with other parts of the boot section 27, or are formed separately and welded. As shown in FIG. 7, a conventional guide member 34 has a wind guide section 32 and a down wind guide section 33 integrally molded inside the boot section 27'.
may be welded or bolted. In the case of the modification shown in FIG. 7, the wind guide section 32 is not located on the extension of the outer peripheral wall 31, but is arranged inside the outer peripheral wall 31, and the rear end 32b is arranged as smoothly as possible on the outer peripheral wall 31.
is connected to.

(Effect of the invention) According to the invention described in detail above, the boot portion 27 has a vertical wall-shaped wind guide portion 32 inserted into the discharge port 8a and disposed closer to the cutter 9 than the front surface 8c of the mower deck 8. The front end 32a of this wind guide section 32 is located approximately in front of the center of the outlet side cutter 9 and is in close contact with the mower deck front surface 8c, and the wind guide section 32 is located at a position rearward of the mower deck front surface 8c. Since it is connected to the outer circumferential wall 31 of the boot section 27, the grass-containing wind discharged from the outlet 8a is deflected to the side and rear at a larger angle than the front surface 8c of the mower deck 8, and is connected to the outer circumferential wall 31 of the boot section 27. Therefore, the wind flows in the boot part 27 while curving along the wind guide part 32, and the flow resistance is small and the wind speed is almost uniform, and there is no clogging of grass clippings. ,
Wind guidance can be made smoother, and grass collection efficiency can be improved.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a cross-sectional plan view of the main part, and FIG.
A line sectional view, Figure 3 is a - line sectional view of Figure 1,
Figure 4 is a sectional view taken along the - line in Figure 1, Figures 5 and 6 are a partially sectional plan view and side view of the entire mowing device, and Figure 7 is
The figure is a sectional plan view showing a modification of the present invention. 1...Tractor body, 7...Mower, 8...Mower deck, 8a...Discharge port, 8b...Deck upper wall, 8c...Front, 9...Katsuta, 15...Grass collection box, 22...Suction Mechanism, 26... Shoot, 27
...Boot part, 32...Wind guide part, 32a...
Front end, 33... Downward guide section, 34... Guide member.

Claims (1)

[Scope of claim for utility model registration] Mower 7 and grass collection box 1 attached to traveling vehicle body 1
5 and a chute 26 for transferring the grass cut by the mower 7 to the grass collection box 15 by air flow, and a curved boot portion 27 of the chute 26 is connected to the discharge port 8a of the mower 7. In the mowing device, the boot portion 27 is provided with a wind guide portion 32 in the form of an upright wall that is inserted into the discharge port 8a and placed closer to the cutter 9 than the front surface 8c of the mower deck 8. The front end 32a of the wind guide section 32 is located approximately in front of the center of the outlet-side cutter 9 and is in close contact with the mower deck front surface 8c. A wind guide structure for a mowing device, characterized in that it is connected to an outer peripheral wall 31.