JPH0117137Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lawn mower that can effectively prevent grass from getting caught between the fan and the fan cover.

The structure within the scroll of a conventional lawn mower is as shown in FIG. 1 or 2.

That is, FIG. 1 is a bottom view of the lawn mower, and a blade 3 is installed in a scroll 2 formed in a housing 1.
is rotatably arranged, and the grass cut by the blade 3 is sent to a discharge port 4 by the wind generated by the rotation of the blade 3, and is discharged from the discharge port 4 into the grass bag. In such a configuration, the cut grass is sent to the grass bag using only the wind generated by the rotation of the blade, which results in insufficient air volume, resulting in a decrease in the yield to the grass bag. It has to be done quickly, which also causes noise.

Therefore, as shown in FIG.
A wide flow fan 5 is provided coaxially with the blade 3 inside the fan 5, and the wide flow fan 5 is surrounded by a fan cover 6 for rectification, and air is blown out from the air outlet 7 of the fan cover 6. There is a system designed to compensate for the lack of air volume in the conventional example shown in .

However, with such a configuration, the cut grass may get caught in the gap S between the wide flow fan 5 and the fan cover 6, reducing the air volume of the wide flow fan 5 and generating noise. becomes.

The present invention was developed to improve the above-mentioned problems with conventional lawn mowers, and it prevents the cut grass from getting caught between the fan and the fan cover, increasing the yield of the cut grass. It is an object of the present invention to provide a lawn mower that is high in height and can reduce noise.

To achieve this objective, the present invention provides a louver at the air outlet of the fan cover surrounding the fan installed in the scroll in order to compensate for the lack of air volume.

Embodiments of the present invention will be described below with reference to FIGS. 3 to 5.

FIG. 3 is an exploded perspective view showing the bottom structure of the lawn mower according to the present invention, FIG. 4 is a bottom view of the lawn mower, and FIG. 5 is a perspective view of the air guide member.

A scroll 11 that is open downward is formed in the housing 10 of the lawn mower, and a fan cover 12 that is also open downward is formed in the center of the scroll 11. and,
A drive shaft 13 protrudes into the space surrounded by the fan cover 12, a blade holder 15 is fixed to the drive shaft 13 via bolts 14, and the wide flow fan 1 is attached from the outside of the blade holder 15.
6 is fitted into the space surrounded by the fan cover 12. Then, with the wide flow fan 16 fitted, the blade 18 is further applied to the wide flow fan 16 from the outside via the intermediate member 17, and the blade 18 and the wide flow fan 16 are attached to the blade holder 15 with bolts 19, 19. Tighten and bind together.
This state is shown in FIG.

Further, an air outlet 20 for blowing out air from the wide flow fan 16 is formed in a part of the fan cover 12, and an air guide member 21 shown in FIG. 5 is fitted into this air outlet 20. It is crowded. The air guide member 21 is divided into a plurality of window portions 22, and louvers 23 are provided to protrude outwardly or inwardly from the vertical frames 22a of these window portions 22. The thickness of these louvers 23 is such that it does not impede the air from the wide flow fan 16, and is set at an appropriate angle so that the air from the wide flow fan 16 is directed toward the discharge port 24.

In the above, when the engine is driven, the drive shaft 1
3 rotates, and along with this rotation, the wide flow fan 16 and the blades 18 rotate together. Then, the grass is cut by the rotation of the blade 18, and the cut grass is exposed to the wind generated by the rotation of the blade 18 and the air generated by the rotation of the wide flow fan 16, which is rectified by the fan cover 12. The air is blown out from the window 22 of the air guide member 21 of the air outlet 20, and is sent to the outlet 24 while rotating inside the scroll 11, and is stored in a glass bag (not shown) through the outlet 24.

Here, when the cut grass rotates inside the scroll 11, the louver 23 of the air guide member 21 fitted into the air outlet 20 of the fan cover 12 moves the cut grass from the window 22 to the fan cover 12. and the wide flow fan 16.

As is clear from the above description, according to the present invention, in a lawn mower in which a fan is disposed within the scroll to compensate for insufficient air volume and the fan is surrounded by a fan cover, the air outlet of the fan cover is An air guide member equipped with a louver to prevent grass from getting caught in the grass ensures sufficient airflow while storing the cut grass from the outlet into the grass bag without causing problems such as grass getting caught. can do. Therefore, lawn mowing efficiency is greatly improved, and since the rotation of the blade can be suppressed to some extent, noise can be reduced, and many other effects can be achieved.

[Brief explanation of drawings]

Figures 1 and 2 are bottom views of a conventional lawn mower, Figure 3 is an exploded perspective view showing the bottom structure of the lawn mower according to the present invention, and Figure 4 is a bottom view of the lawn mower shown in Figure 3. , FIG. 5 is an overall perspective view of the air guide member. In the drawings, 10 is a housing, 11 is a scroll, 12 is a fan cover, 16 is a fan, 18 is a blade, 20 is an air outlet, 21 is an air guide member, 22 is a window, and 23 is a louver.

Claims (1)

[Scope of utility model registration request] In a lawn mower equipped with a fan cover that stores a fan within a scroll that rotatably holds a lawn mowing blade, the air outlet of the fan cover is provided with a louver to prevent grass from getting caught. Features Lawnmower.