JP2965194B2 - Lawn mower with air suction mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a lawn mower, and more particularly to an air suction mechanism for sucking air through an air suction port for cooling a drive unit.

[0002]

2. Description of the Related Art As a conventional lawn mower having an air suction mechanism, there is a lawn mower described in JP-B-61-30526. This lawn mower is shown in the side sectional view of FIG. The body 100 of this conventional lawn mower includes a motor 110, a rotary blade shaft 105J.
The motor 110 is driven by a timing belt or the like.
5 is transmitted.

[0003] In a state where the rotary blade 105 is rotated, the operator holds the handle 102 and moves the lawn mower in the direction of arrow 90 on the lawn. The main body 100 is provided with a front wheel 106 and a rear wheel 107 for traveling. By operating the adjustment lever 120, the height of the front wheel 106 is switched, and the height of lawn mowing is adjusted.

In the main body 100, a fixed blade 104 is fixed close to the rotary blade 105. This rotary blade 105
The grass is cut by the sliding of the blade with the fixed blade 104.
The cut grass is guided to the grass catcher 103 by the rotating wind of the rotating blade 105.

Since the motor 110 generates heat as it is driven, it is necessary to inhale cooling air. For this reason, this lawn mower has an opening 130 formed in the bottom surface of the motor 110. Air is sucked through the opening 130 by a fan or the like provided on the rotating shaft of the motor 110 to cool the motor 110.

[0006]

A conventional lawn mower having an air suction mechanism has the following problems. As described above, the cooling air for the motor 110 is supplied to the opening 130.
Has been inhaled through. The opening 130
Are formed behind the rotary blade 105 and the fixed blade 104 in the traveling direction of the lawn mower (the direction of the arrow 90), as shown in FIG.

As described above, the rotary blade 105 and the fixed blade 10
Most of the turf that has been cut by grinding with the blade 4 is rotated by the rotating wind of the rotating blade 105 so that the grass catcher 10
It is led to 3. However, some fine turf debris and dust do not enter the glass catcher 103, but fall on the turf and remain. The turf dust and the like may be sucked from the opening 130 along with the suction of the air, and may enter the inside of the motor 110. As described above, in the configuration of the conventional lawn mower, there is a problem that the failure of the motor 110 may occur due to inhalation of turf debris or the like.

Further, the turf sometimes falls down due to stepping on or the like and does not stand up, and the turf which has been elongated often does not stand up. Turf in such a state is
5 cannot reliably reap. In the conventional lawn mower shown in FIG.
The height of the lawn mower is adjusted by switching the height of 06, but even if the height is adjusted to a desired height, grass that is not standing up cannot be reliably mowed.

Accordingly, the present invention provides a lawn mower having an air suction mechanism that can perform reliable mowing by standing up the turf, and can also avoid a failure of a drive unit and the like caused by suction of cuttings and the like. The purpose is to provide.

[0010]

According to the present invention, there is provided a lawn mower having an air suction mechanism according to the present invention. An air suction port formed at a position where the air suction path formed toward the drive unit is connected, and air for cooling the drive unit is supplied through the air suction port. was sucked into the suction passage, met suction portion erecting the grass on the basis of the air suction force
And a suction unit attached to the drive unit .

[0011]

In the lawn mower having an air intake mechanism according to the present invention, the cutting blade, air inlet is formed at a position away toward the traveling direction of the mower, the air intake
The mouth is connected to an air intake passage formed toward the drive unit.
Have been. And the suction part is air that cools the drive part
Into the air suction passage through the air suction port
Then, the turf is raised based on the air suction force.

As described above, the turf rises toward the air suction port, and the air suction port is formed in front of the cutting blade. Therefore, the turf in an upright state can be cut by the cutting blade. In addition, since the air suction port is formed in the front direction of the cutting blade, cutting dust and the like are not sucked.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a lawnmower having an air suction mechanism according to the present invention will be described with reference to the drawings. FIG. 1 is a bottom view of the lawn mower according to the present embodiment, and FIG.
FIG. 2 is a sectional view taken in the direction of arrows II. FIG. 3 is a partially enlarged view of FIG.

As shown in FIG. 2, the main body 2 incorporates a motor 6 as a driving unit, a rotary blade 8 as a cutting blade, and a fixed blade 14. The rotary blade 8 rotates about a rotary blade shaft 8J, and the rotary blade 8 is provided with a plurality of cutting edges 8G spirally with respect to the rotary blade shaft 8J. The motor 6 is driven by a small pulley 32 and a large pulley 33 provided on the left side of the lawn mower.
(FIG. 1) and a timing belt (not shown) are transmitted to the rotary blade 8 after being decelerated.

The fixed blade 14 is provided as a receiving blade of the cutting edge 8G at a position close to the rotation orbit of the cutting edge 8G, and cuts grass by sliding the cutting edge 8G of the rotary blade 8 and the fixed blade 14. In addition, by rotating the adjustment bolt 16, the sliding distance between the blade edge 8 </ b> G and the fixed blade 14 can be adjusted.

With the rotating blade 8 rotated, the operator holds the handle 9 and moves the lawn mower on the lawn in the direction of arrow 90 (moving direction) to mow the lawn. The main body 2 is provided with a front wheel 30 and a rear wheel 31 for traveling. The arm 40 that supports the front wheel 30 is rotatable in the direction of the arrow 92 around the arm shaft 40J.
The lawn mowing height is adjusted by rotating the arm 40 to switch the height of the front wheel 30.

The cut grass is guided by the rotating wind of the rotary blade 8 in the direction of arrow 93 shown in FIG. The grass catcher 4 is detachable from the main body 2 so that grass accumulated inside can be eliminated. FIG. 1 is a bottom view with the glass catcher 4 removed, and FIG. 1 does not show the glass catcher 4.

Since the motor 6 generates heat when driven, it is necessary to inhale cooling air. In the present embodiment, a fan 5 (FIG. 2), which is a suction unit, is mounted on the right side of the motor shaft of the motor 6, and the fan 5 rotates with the rotation of the motor 6.

On the other hand, as shown in FIGS. 1 and 2, the traveling direction (the direction of arrow 90) is from the rotary blade 8 and the fixed blade 14.
A suction port plate 10 is provided at a position away from the suction port plate 10, and a plurality of slits 10S serving as air suction ports are formed in the suction port plate 10. Then, an air suction path 7 is formed from the suction port plate 10 toward the motor 6, and the rotation of the fan 5 sucks air in the direction of arrow 94 (FIG. 2) through the slit 10S to suppress heat generation of the motor 6.

When the air is sucked in the direction of the arrow 94, the turf 60 at the lower portion of the suction port plate 10 is sucked up and rises as shown in FIG. As described above, since the suction port plate 10 is provided in front of the rotary blade 8 and the fixed blade 14 in the traveling direction, the turf immediately before the rotary blade 8 and the fixed blade 14 stands. That is, while the lawn mower is advanced in the direction of the arrow 90, the lawn 60 standing up one after another can be mowed by the rotary blade 8 and the fixed blade 14.

Further, since the inlet plate 10 is provided in front of the rotary blade 8 and the fixed blade 14,
Unlike the case where it is formed in the rearward direction, it does not inhale cuttings and dust. For this reason, it is possible to avoid a failure of the motor and the like due to the suction of the cuttings and the like.

In the above embodiment, the suction port plate 10 as shown in FIGS. 1 and 2 has been exemplified. However, as another embodiment, the rotary blade 8 and the fixed blade 14 have substantially the same length, or the rotary blade 8 and the fixed blade A suction port plate longer than the blade 14 may be provided (not shown), and a slit may be formed in the suction port plate. In this case, the turf can be erected over a wide range in the axial direction of the rotary blade 8 and the fixed blade 14, and the turf can be more reliably cut. Further, in the above embodiment, the plurality of slits 10S are shown as suction ports, but suction ports of other shapes may be formed.

The lawn mower having the air suction mechanism according to the present invention is not limited to the above embodiment, but may be any as long as it forms a suction port in front of the cutting blade and sucks air.
Other shapes and structures may be adopted.

[0024]

In the lawn mower having an air intake mechanism according to the present invention, the cutting blade are air inlet is formed at a position away toward the traveling direction of the mower, the air
ー The air inlet has an air intake passage formed toward the drive unit.
It is connected. Then, the suction unit cools the driving unit
Air flows into the air suction passage through the air suction port
And the turf is raised based on the air suction force.

As described above, the turf rises toward the air suction port, and the air suction port is formed in the forward direction of the cutting blade. That is, the grass in the upright state can be cut by the cutting blade. Therefore, the lawn can be reliably cut.

Further, since the air suction port is formed in the forward direction of the cutting blade, no cutting dust or the like is sucked. For this reason, it is possible to avoid a failure of the drive unit and the like due to the inhalation of cuttings and the like.

[Brief description of the drawings]

FIG. 1 is a bottom view showing an embodiment of a lawnmower having an air suction mechanism according to the present invention.

FIG. 2 is a sectional view taken in the direction of arrows II-II in FIG.

FIG. 3 is an enlarged view of the vicinity of a suction port plate in FIG. 2;

FIG. 4 is a side sectional view showing a lawn mower having a conventional air suction mechanism.

[Explanation of symbols]

 5 ... Fan 6 ... Motor 7 ... Air suction passage 8 ... Rotating blade 14 ... Fixed blade 10 ... Suction plate 10S ····slit

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A01D 34/00

Claims (1)

(57) [Claims] 1. A cutting blade for mowing grass when driven by a driving unit, an air inlet formed at a position away from the cutting blade in a traveling direction of a lawn mower, wherein: An air suction port connected to an air suction path formed toward the air suction port, sucks air for cooling the driving unit into the air suction path through the air suction port, and stands the grass based on the air suction force. Suction unit , which is connected to the drive unit.
A lawn mower having an air suction mechanism, comprising: a suction portion attached thereto.