JPH07123835A - Grass mowing machine - Google Patents

Abstract

PURPOSE:To obtain a grass mowing machine capable of reducing a frequency of mown grass discharges and noise of a cutter blade, by driving a mown grass conveying means with an engine which also drives rotation of the cutter blade and by setting an exhausting portion near a carrying port of the mown grass conveying means. CONSTITUTION:By driving a mown grass conveying means 10 with an engine 4 which drives rotation of a cutter blade 8, to convey mown grass to a grass vessel 13 compulsorily through a conveying route 5. By setting a cover 36 in an upper part of a casing 11 of the grass conveying means 10 and by forming exhausting portions at the upper part, rear part and both of the sides of the cover 36 located at an upward position to a carrying port 11a of the casing, only the mown grass is dropped on the conveyer unit by their own weight and crammed into a grass vessel as compressed. The height of the blade 8a can be lowered to reduce its noise caused by blowing wind.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawnmower for cutting grass by rotating a cutter blade by an engine.

[0002]

2. Description of the Related Art A conventional example of such a lawnmower is shown in FIG.

That is, FIG. 6 is a side view of a conventional lawnmower 101, in which the housing 105 is provided.
A cutter blade 108 is attached to the lower end of a crankshaft 107 that hangs from the engine 104 arranged above, and a glass bag 113 is detachably attached to the outlet formed in the housing 105. .

Then, the lawn mower 101 is driven while the engine 104 is driven to rotate the cutter blade 108.
When the blade is moved forward, the grass is mowed by the cutter blade 108, and the mowed grass is sent backward together with the wind induced by the cutter blade 108.
It is stored in the glass bag 113. At this time, the air is the mesh-shaped exhaust port 1 formed in the glass bag 113.
Only grass clippings are discharged from 13a and stored in the glass bag 113.

When the grass bag 113 is filled with the grass, the grass bag 113 is removed, the grass is discarded, and the empty grass bag 113 is attached to the housing 105 again.

[0006]

However, in the above-mentioned conventional lawnmower 101, the lawnmower is pushed into the glass bag 113 while being mixed with air by wind pressure. For this reason, the density of the grass clippings stored in the glass bag 113 is low, the storage amount is naturally limited, and the number of times the glass bag 113 is removed and the grass clippings is discarded increases, resulting in poor work efficiency. there were.

Further, since the cutter blade 108 needs to send the cut grass to the glass bag 113 and generate the wind of the amount and pressure necessary to store the grass in the glass bag 113, the height of the blade 108a. There is also a problem that the noise increases due to the wind cutting of the blade 108a.

The present invention has been made in view of the above problems, and an object thereof is to reduce the number of times of discarding lawn grass to improve work efficiency and to reduce noise due to wind cutting of a cutter blade. It is to provide a lawnmower that can be designed.

[0009]

In order to achieve the above object, the present invention provides a lawnmower for feeding grass cut by a cutter blade rotationally driven by an engine together with wind and storing the grass in a glass bag. A transport means for driving the grass lawn to be forcibly transported is provided in the transport path of the lawn grass, the glass bag is connected to the discharge port of the transport means, and an air exhaust section is provided near the carry-in port of the transport means. It is characterized by that.

[0010]

According to the present invention, the grass mowed by the cutter blade is sent to the carry-in port of the conveying means together with the wind induced by the cutter blade. Only the turf falls under its own weight and is carried into the carrying means from the carry-in entrance.

Thus, the grass lawn carried into the carrying means is forcibly carried by the carrying means driven by the engine and pushed into the glass bag through the discharge port. A large amount of grass clippings are packed in a compressed state. Therefore, the number of times the grass bag is removed and the lawn mowing is discarded is reduced, and the working capacity is improved.

Further, since the cutter blade only needs to induce wind of the amount and pressure necessary for sending the cut grass to the carry-in port of the conveying means, the height of the blade can be suppressed to a low level, and the blade is cut by wind. Noise can be reduced.

[0013]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side sectional view showing a structure of a grass-collecting system of a lawn mower according to the present invention, FIG. 2 is a side sectional view showing a constitution of a drive system of a conveying means of the lawn mower, and FIG. FIG. 4, FIG. 4 is an enlarged side sectional view of the drive system of the conveying means, and FIG. 5 is an enlarged plan sectional view of the drive system.

As shown in FIGS. 1 to 3, a lawn mower 1 according to the present invention has a pair of left and right rotatable front wheels 2 at its front and rear portions.
And the rear wheels 3 respectively support them so that they can travel freely.
An engine 4 is arranged in the front part.

Further, the lawn mower 1 has a housing 5, and inside the housing 5, a scroll-shaped conveying path 5a for conveying cut grass with wind is formed, and a part of the lower surface thereof is open. To form the opening 5b.
A handle 6 is provided upright on the rear upper surface of the housing 5.

A crankshaft 7 hanging from the engine 4 faces the inside of the housing 5, and a cutter blade 8 is attached to the lower end of the crankshaft 7. The cutter blade 8 faces the opening 5b of the housing 5, and a blade 8a is formed on the outer peripheral portion thereof.

By the way, in this embodiment, a conveying means 10 is provided at the lower rear end of the housing 5.
This conveying means 10 is a screw type conveying means,
This is configured by accommodating a rotatable screw shaft 12 in a substantially cylindrical casing 11 attached to a housing 5.

By the way, an upper portion of the casing 11 which faces the housing 5 is opened to form a carry-in port 11a, and a rear end of the casing 11 extending out of the housing 5 is also opened to form a discharge port 11b. I am configuring. A glass bag 13 is detachably attached to the outer periphery of the rear end portion of the casing 11 extending outside the housing 5.
The outlet 11b is open in the glass bag 13. A cover 36 is attached to the upper part of the casing 11 to integrate them, and the integrated casing 11 and cover 36 are incorporated in the housing 5.

Further, at the upper part, the rear part and both side parts of the cover 36 located above the carry-in port 11a of the casing 11, there are formed air exhaust parts (not shown) for exhausting only air into the atmosphere. There is. It should be noted that this air exhaust section is formed by a mesh-shaped or louver-shaped opening.

Here, details of the structure of the drive system of the conveying means 10 will be described with reference to FIGS.

The screw shaft 12 is formed by spirally forming a screw blade 12b on the outer circumference of a cylindrical sleeve 12a, and a rotary shaft 14 is attached to one end thereof. The rotary shaft 14 is rotatably supported on the housing 5 by a bearing 15.
A pulley 16 is attached to the wire 4.

Further, another rotating shaft 17 arranged in parallel with the rotating shaft 14 is rotatably supported in the housing 5 by a bearing 18, and the pulley 19 connected to the rotating shaft 17 and the rotating shaft 17 are rotated. An endless timing belt 20 is wound around a pulley 16 attached to the shaft 14.

On the other hand, the gearbox 2 is provided on the housing 5 side.
1, an input shaft 22 and an output shaft 23 are coaxially arranged in the gear box 21, and an intermediate shaft 2
4 is arranged parallel to the input shaft 22 and the output shaft 23.

The input shaft 22, the output shaft 23 and the intermediate shaft 2
4 is rotatably supported by bearings 25, 26 and 27, respectively, and a small diameter gear 28 connected to the input shaft 22 meshes with a large diameter gear 29 connected to the intermediate shaft 24 to form an intermediate shaft. The small-diameter gear 30 connected to 24 is in mesh with the large-diameter gear 31 connected to the output shaft 23.

The input shaft 22 is connected to the PTO shaft 33 of the engine 4 by the coupling 32, and the output shaft 23 and the rotating shaft 17 are connected to each other via the universal joint 34 and the rotating shaft 35. .

Next, the operation of the lawn mower 1 will be described.

When the engine 4 is driven, the cutter blade 8 bound to the crankshaft 7 of the engine 4 is rotationally driven at a predetermined speed, and the rotation of the engine 4 is P.
It is transmitted to the input shaft 22 via the TO shaft 33 and the coupling 32, and the rotation of the input shaft 22 is transmitted to the gears 28, 29, 30,
It is decelerated by two stages via 31 and transmitted to the output shaft 23. The rotation of the output shaft 23 is caused by the rotation shafts 35, 17 and the pulley 1.
The rotary shaft 14 and the screw shaft 12 supported by the rotary shaft 14 are rotatably driven at a predetermined speed.

When the handle 6 is operated from the above state to move the lawn mower 1 forward, the lawn mower is cut by the cutter blade 8 rotating as described above, and the lawn mowed is induced by the cutter blade 8. It is sent in the direction of the arrow in FIG. In addition, in FIG. 1, a black arrow indicates a flow of grass clippings, and a white arrow indicates a flow of air.

When the grass clippings are sent in the direction of the arrow (rearward) in FIG. 1 as described above, the air is discharged into the atmosphere from the unillustrated air exhaust section formed in the cover 36, and the remaining cuttings are carried out. The turf drops under its own weight and is carried into the casing 11 through the carry-in port 11a of the carrying means 10.

By the way, since the screw shaft 12 is rotationally driven at a predetermined speed in the casing 11 as described above, the grass clippings carried into the casing 11 are forcibly forced one after another by the screw blades 12b of the screw shaft 12. It is conveyed rearward, discharged from the discharge port 11b of the casing 11, and sent into the glass bag 13.

As described above, since the lawn grass is forcibly conveyed by the conveying means 10 and pushed into the glass bag 13, a larger amount of lawn grass is compressed in the glass bag 13 (high density state). Packed in. For this reason,
The number of times the grass bag 13 is removed and the grass clippings are discarded is reduced, and the work efficiency is improved.

Further, since the cutter blade 8 only needs to induce the wind of the amount and pressure necessary for sending the cut grass to the carry-in port 11a of the conveying means 10, the height of the blade 8a can be kept low, As a result, it is possible to reduce the noise caused by the wind cutting of the blade 8a.

[0034]

As is clear from the above description, according to the present invention, a lawn mower that sends grass cut by a cutter blade that is rotationally driven by an engine together with wind and stores the grass in a grass bag is used by the engine. A transport means for driving the grass lawn to be forcibly transported is provided in the transport path of the lawn grass, the glass bag is connected to the discharge port of the transport means, and an air exhaust section is provided near the carry-in port of the transport means. Therefore, it is possible to reduce the number of times of discarding the lawn grass to improve the work efficiency and to reduce the noise caused by the wind cutting of the cutter blade.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a structure of a grass collection system of a lawn mower according to the present invention.

FIG. 2 is a side sectional view showing the configuration of the drive system of the conveying means of the lawn mower according to the present invention.

FIG. 3 is a plan sectional view showing a configuration of a drive system of a transfer means of the lawn mower according to the present invention.

FIG. 4 is an enlarged side sectional view of the drive system of the transfer means of the lawn mower according to the present invention.

FIG. 5 is an enlarged plan sectional view of the drive system of the conveying means of the lawn mower according to the present invention.

FIG. 6 is a side view of a conventional lawnmower.

[Explanation of symbols]

 1 Lawn Mower 5 Housing 5a Conveying Path 8 Cutter Blade 10 Conveying Means 11 Casing 11a Carrying In 11b Discharging 13 Glass Bag

Claims (1)

[Claims] 1. A lawn mower for feeding grass cut by a cutter blade rotatably driven by an engine together with wind and storing the grass in a glass bag, and a conveying means for driving the grass forcibly by the engine. A lawn mower, characterized in that it is provided on a transport path for cutting grass, the glass bag is connected to an outlet of the transport means, and an air exhaust section is provided near a carry-in entrance of the transport means.