JPH0530586Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of a mower used for lawn mowing work.

[Conventional technology]

Conventional mowers include, for example, the
As shown in Japanese Patent No. 136834, a structure in which a plurality of air intake ports are provided on the upper surface of the cutting blade housing has been proposed.

[Problem that the invention attempts to solve]

In the conventional structure described above, an air intake is provided to prevent a decrease in the wind force of the cut grass conveying wind. However, since a bar blade is located directly below the air intake, the grass is cut by the bar blade and the grass is blown upward. Blown grass clippings sometimes flew through the air intake and onto the top surface of the cutting blade housing. However, since a belt transmission mechanism for driving the bar blade is disposed above the cutting blade housing, there is a risk that scattered grass clippings may become caught in the belt windings and cause the belt to rotate. Additionally, when the wind flowing in from the air intake is strong, the wind and the air blown by the bar blades combine to create turbulent flow, which blows down the planted grass, making it difficult for the bar blades to mow the lawn. There was also a risk that the height would vary, resulting in poor cutting height.

The purpose of the present invention is to solve the above problems and to enable mowing work to be carried out efficiently and reliably.

[Means for solving problems]

The feature of this invention is that it is equipped with a bar blade that is rotatably driven on the inner and lower side of the cutting blade housing, and that an air intake for blowing the cut grass is formed on the ceiling surface of the cutting blade housing. A baffle plate is provided at a position facing the air intake port with a ventilation interval from the ceiling surface, and its functions and effects are as follows.

[Effect]

The grass clippings cut by the bar blade and blown upward hit the baffle plate, are prevented from moving further upward, and are guided along the lower surface of the baffle plate by the conveying wind generated by the rotational force of the bar blade, This prevents it from scattering onto the upper surface of the cutting blade housing.
Furthermore, even if strong wind flows inward from the air intake port toward the inside of the cutting blade housing, the incoming wind is guided through between the baffle plate and the ceiling surface, causing turbulence against the planted grass. There is nothing to do.

[Effect of idea]

Therefore, while it is possible to prevent a decrease in the wind power for conveying the cut grass, it is also possible to prevent the cut grass from blowing back onto the upper surface of the cutting blade housing, and to prevent the planted grass from falling over due to turbulence, thereby reducing the cutting height. It can be made uniform,
Lawn mowing work can now be carried out efficiently and reliably, without problems with the bar blade transmission system or defects in cutting height.

〔Example〕

FIG. 4 shows a riding lawn mower equipped with a mower 1 according to the present invention. This lawnmower is equipped with a mower 1 that can be raised and lowered freely by a link mechanism 5 on the lower abdomen between the front and rear wheels 3 and 4 of a traveling machine body 2, and has a mower 1 installed at the rear of the machine body 2, which is mowed by the mower 1. A grass collection container 6 for collecting waste is detachably attached.

A guide duct 8 extends from the right side opening of the cutting blade housing 7 of the mower 1 to the upper side of the grass collection container 6 for conveying and guiding the cut grass.

Next, the structure of the mower 1 will be explained.

As shown in FIG. 1, the mower 1 is equipped with a pair of left and right bar blades 12, 12 which are driven and rotated around a vertical axis inside the cutting blade housing 7, and the grass is cut by the rotation of the bar blades 12, 12. The cut grass is conveyed to the grass collection container 6 via the front inner surface of the cutting blade housing 7 and the guide duct 8 by the wind force of the bar blades 12, 12.

A transmission mechanism A for driving the bar blades 12, 12 is provided on the upper part of the cutting blade housing 7.
That is, as shown in FIG. 3, the power of the engine 13 mounted on the traveling body 2 is transmitted to the drive shaft 15 via the transmission belt 14, and the drive pulley 16 attached to the drive shaft 15 and the bar A driven pulley 18 attached to the blade support shafts 17, 17,
The transmission belt 19 is wound around the belt 18, and
A tension roller 20 applies tension.
Further, these transmission mechanisms A are covered with a transmission cover 21.

A plurality of air intake ports 23 are formed in the rear portion of the ceiling surface 22 of the cutting blade housing 7 along the rotational direction of the bar blades 12, 12.
Further, an air intake port 25 is formed in the side surface 24 of the transmission cover 21. By providing such air intake ports 23 and 25, even if the space between the lower peripheral edge of the cutting blade housing 7 and the ground is clogged with grass, the bar blades 12 and 12 can easily transport the cut grass. It is designed so that the wind power does not decrease.
Furthermore, the air flowing in through the air intake ports 23 and 25 has the effect of cooling the air generated by belt friction of the transmission mechanism A.

A baffle plate 26 is provided at a position facing the air intake port 23 on the inner side of the cutting blade housing 7 with a ventilation gap between it and the ceiling surface of the cutting blade housing 7. This baffle plate 26 is fixedly supported by a rear peripheral side portion 27 of the cutting blade housing 7 and the shaft supports 28 of the bar blades 12, 12.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the mower according to the present invention, in which Fig. 1 is a plan view, Fig. 2 is a vertical side view, Fig. 3 is a cross-sectional plan view showing the transmission mechanism, and Fig. 4 is the entire riding lawn mower. FIG. 7...Mower blade housing, 12...Bar blade, 22...Ceiling surface, 23...Air intake, 2
6...Baffle board.

Claims (1)

[Scope of utility model registration request] A bar blade 12 is provided on the inner and lower side of the cutting blade housing 7 and is rotatably driven. The mower is provided with a baffle plate 26 at a position facing the air intake port 23 with a ventilation interval from the ceiling surface 22.