JPS6283817A - Reaped grass discharge apparatus in grass reaper - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field This invention is a method for transporting grass cut by a blade mounted on a vertical drive shaft inside a casing and rotating in a horizontal plane from inside the casing to a discharge port. The cut grass is conveyed through the circular discharge passage on the discharge wind that blows from the fan chamber at the center of the casing and joins the discharge passage at an appropriate position. This invention relates to a device for discharging grass clippings that discharges grass clippings well.

(b) Prior Art Conventionally, when it comes to discharging grass clippings in this type of mower, it is not sufficient to discharge the grass clippings only by the wind generated by the rotation of the blade or by its centrifugal force.

Therefore, Special Publication No. 53-18419 and Special Publication No. 54-17
As seen in No. 663, a fan is installed in addition to the blades in an attempt to increase the overall air volume.

(c) Problems to be solved by the invention However, all of these devices merely use fans to generate air, and the discharge performance itself should be improved by devising the discharge passages and air channels. It is different from what it says.

As an improvement on this, there is a method that installs a unique discharge passage for discharging cut grass, sends wind generated by a fan into this discharge passage, and attempts to release one shell by riding on this discharge wind. .

This example is shown in FIG. 4, where a fan chamber 2 is provided in the center of the casing 1, and a radial fan 3 is installed in the fan chamber 2.
is accommodated, and a spiral discharge passage 4 is formed around it. Then, one part of the fan chamber 2 is opened to form an air outlet 5, and the fan chamber 2 is made to merge with the discharge passage 4 at an appropriate position.

However, even in this case, since the fan 3 is of a radial type, its only function is to send the wind generated by its own rotation into the discharge passage 4. Therefore, even if it is possible to secure a sufficient amount of discharge air after the confluence of the outlet 5 and the discharge passage 4, upstream from this point (QIJ is insufficient) (this does not mean that the outlet 5 If it is moved to the side or made unnecessarily wide, it will not be possible to generate a good discharge air across the entire discharge passage 4).

Furthermore, Japanese Patent Application Laid-Open No. 57-202217 discloses a device in which a cutting chamber for grass stems is partitioned next to a discharge passage, and the cut grass is sucked in and carried out by the suction effect of a fan rotating within the discharge passage.

However, even with this, the structure is complex and
It is doubtful whether the suction effect is sufficient.

(d) Means for solving the problems Accordingly, the present invention solves the above-mentioned problems by taking the following measures.

That is, the grass cut by a blade attached to a vertical drive shaft inside the casing and rotating in a horizontal plane is blown out from a fan chamber in the center of the casing through a circular discharge passage leading from the inside of the casing to the discharge port. In a lawn mower that discharges the grass from the discharge port while being carried by the discharge wind that merges at an appropriate point in the discharge passage, a fan mounted on the drive shaft and housed in the fan chamber is rotated simultaneously with the blades. The airflow generated by the axial fan is directed in the axial direction of the drive shaft, and is blown out from below all around the fan chamber into the discharge passage. .

This solved the problems mentioned above.

(e) Effect By taking this measure, since the fan installed in the fan room is an axial flow fan, it is possible to generate wind that blows through the fan room from top to bottom. the result,
This air blows out from below all around the fan room into the adjacent discharge passage, making it possible to further intensify the discharge air in the discharge passage.

(F) Examples Examples of the present invention will be described below with reference to the drawings.
Figure 1 is a vertical sectional view of the main parts of a mower mainly used for mowing lawns, etc. Figure 2 is a partially sectional plan view of the mower, Figure 3 is a side view, and Figure 4 is a conventional mowing machine. FIG. 2 is a partially sectional plan view of the machine.

First, let me explain the overall structure of the mower.

The lawn mower is equipped with a front wheel 6 and a rear wheel 7 and has an elliptical (shaped like an upside-down bowl) casing 1, and an engine 8 is mounted on the center of the upper surface of the casing 1. other,
A drive shaft 9 is suspended from the engine 8, and a knife-shaped blade 10 is attached to the lower end of the drive shaft 9 so as to be rotatable in a horizontal plane. Note that the engine 8 and the like are covered with a ball-shaped cover 11 and are not exposed.

The inside of the casing 1 has a spiral-shaped cylindrical part that starts from the rotation locus of the blade 10 and swells rearward along the outer peripheral edge of the casing. In addition to providing a release path 4 for the collected grass (grass),
The rear end of this discharge passage 4 is opened and serves as a discharge port 12. In addition.

Usually, a cassocket 13 is connected to the rear of the outlet 12, so that the grass discharged from the outlet 12 can be deposited in it.

Furthermore, a handle 14, which will be described later, is installed from the rear of the casing 1, and is equipped with an operating lever 15 for intermittent power transmitted from the engine 8 to the blade 10, a running lever 16 for controlling running and stopping of the aircraft itself, and the like. Set it up.

By the way, in this invention, an axial flow type axial flow fan 17 is installed in a fan chamber 2 provided in the center of nine or more casings 1.

That is, the blade 10 described above is attached to the lower end of the drive shaft 9 hanging from the engine 8 via the clutch 18, and the axial fan 17 is attached between the blade 10 and the upper clutch 10. It is.

As a result, when the 5 operating lever 15 is operated to transmit the power of the engine 8 to the blades 10, the blades 10 rotate and cut the grass stems within their action range, and at this time, the axial flow fan 17 also rotates. Rotates simultaneously with blade IO.

On the other hand, the engine 8 is attached to the upper part of the fan chamber 2 via a spacer 19, and a gap 20 is formed in this part, so that outside air enters through this gap 20 and the axial flow fan]7
A vertical flow is formed that passes through the blades 10 and reaches the ground 21. Note that the wind that collided with the ground 21 is blown out into the discharge passage 4 from below all around the fan room 2 as it is. Then, the wind blown into the discharge passage 4 passes through this and finally reaches the Kya Nochibanog 13, and at this time, the cut grass is carried on the discharge wind.

(g) Effects of the invention Based on the above, this invention can be expected to have the following effects.

First, the fan housed in the fan chamber 2 is a non-flow type axial fan 17 that rotates simultaneously with the blades 10, and the wind generated by the axial fan 17 is passed in the axial direction of the axial fan 17 and the blades 10. By blowing into the discharge passage 4 from below all around the fan chamber 2, the force of the discharge air flowing through the discharge passage 4 can be increased, and the conveyance performance of the cutting group can be improved.

In addition, by creating the wind blowing from top to bottom in the fan chamber 2 and the casing 1, components installed above the axial fan 17, such as the clutch 18 and the engine 8, Cut grass on the ceiling etc.
It can also prevent mud etc. from sticking, and in this way,
If mud and the like do not adhere to the discharge passage 4 and each member, the conveyance performance of the cutting group can be improved accordingly.

[Brief explanation of drawings]

Figure 1 is a vertical sectional view of the main parts of a mower mainly used for mowing lawns, etc. Figure 2 is a partially sectional plan view of the mower, Figure 3 is a side view, and Figure 4 is a conventional mowing machine. FIG. 2 is a partially sectional plan view of the machine. (Symbol) ■...Casing 10...Blade 2...Fan chamber 12...Discharge port 4...Discharge passage
17... Axial fan 9... Drive shaft

Claims (1)

[Claims] The blade (10) mounted in the casing (1) on a vertical drive shaft (9) and rotating in a horizontal plane removes the cut grass from the casing (1) in a circular shape leading to the outlet (12). This casing (1) inside the passage (4)
Air is blown from the central fan chamber (2) to the discharge passageway (4).
In a lawn mower that discharges air from the discharge port (12), the fan attached to the drive shaft (9) and housed in the fan chamber (2) is conveyed by the discharge wind that joins at a suitable location. An axial fan (17) is formed which rotates simultaneously with the blades (10), and the wind generated by the axial fan (17) is directed in the axial direction of the drive shaft (9), and the fan chamber is (2) A device for discharging grass clippings in a mower, characterized in that the grass is blown into the discharge passageway (4) from below all around.