JP3817181B2 - Traveling lawn mower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a traveling lawn mower in which a rotary mower with a pair of left and right rotary cutting blades is attached to a traveling machine body.
[0002]
[Prior art]
Conventionally, this type of lawn mower has a shaft line that is supported by a pair of front wheels and a pair of rear wheels as described in Japanese Patent Application Laid-Open No. 9-9757, for example. A pair of left and right cutting blades rotating in opposite directions in a substantially vertical direction, a cover case covering both the cutting blades, and the cutting lawn so as to be discharged out of the cover case by rotating the cutting blades in the forward direction. A rotary mower provided with a discharge duct is attached, and the turf grass on the ground is cut by the rotary mower, and then the cut grass is collected and discharged from the discharge duct to the outside of the cover case.
[0003]
[Problems to be solved by the invention]
However, the above-described conventional rotary mower performs the cutting and discharging work of collecting the cutting turf and discharging it from the discharge duct to the outside of the cover case, so that the cutting turf is distributed so as to lay on the ground. In order to perform the mulching work, the exhaust duct from the cover case is closed with a cover member, or both cutting blades are configured not to release from the exhaust duct of the cutting lawn. I try to replace it with something.
[0004]
In other words, when switching from the mowing and discharging work to the mulching work, not only is it necessary to have other parts, but it is also necessary to install or replace these parts, and switching the work is extremely troublesome. It was.
[0005]
An object of the present invention is to provide a traveling lawnmower that solves this problem.
[0006]
[Means for Solving the Problems]
In order to achieve this technical problem, claim 1 of the present invention provides:
“A traveling body supported by a traveling body such as a wheel has a pair of left and right cutting blades that rotate in opposite directions with the axis substantially vertical, a cover case that covers both cutting blades, A traveling lawn mower equipped with a rotary mower equipped with a discharge duct for discharging the cut grass cut by rotation in the direction to the outside of the cover case,
Rotation direction of both cutting blades in the rotary mower to the power transmission unit from the power source mounted on the traveling machine body to the rotary mower, the forward direction for discharging from the dust discharged from the mowing lawn, and the discharge duct of the mowing lawn Means are provided for selectively switching to the reverse direction in which the release from the blades is not performed, while both the cutting blades in the rotary mower include the cutting blade in addition to the cutting blades when the cutting blades are rotated in the forward direction. A cutting blade was provided when the blades were rotated in the reverse direction, and an inclined surface was provided to press the mowing lawn against the ground when the blades were rotated in the reverse direction . "
It is characterized by that.
[0007]
[Operation and effect of the invention]
2. The structure according to claim 1 , wherein both the cutting blades in the rotary mower are rotated in the forward direction while traveling on the traveling body, and the grass on the ground is sequentially cut, and then the cutting grass is collected and the cover case is removed from the discharge duct. The mowing and discharging operation of releasing to the outside can be performed.
[0008]
Therefore, by switching both the cutting blades in the reverse direction, the cutting lawn is widely dispersed so as to be laid on the ground in the cover case without being discharged from the cover case through the discharge duct. The mulching work that can be done.
[0009]
Therefore, according to the present invention, switching from the mowing and discharging operation to the mulching operation can be performed by switching in the rotation direction, and in this case, in addition to the need for another part as in the prior art, Since an operation for attaching or replacing these parts is not required, the above-described operation switching can be performed extremely easily and quickly.
[0010]
In this case, both the cutting blades in the rotary mower are provided with a cutting blade for rotating the cutting blade in the reverse direction, in addition to the cutting blade for rotating the cutting blade in the forward direction, and in the reverse direction. By providing an inclined surface that presses the mowing lawn against the ground when rotating in the reverse direction, cutting in the reverse direction can be performed in the same way as when rotating in the forward direction. The mowing lawn can be cut more finely than when there is no inclined surface, such as cutting again with a cutting blade when rotating in the reverse direction while pressing against the ground side with the inclined surface. Can be evenly distributed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0012]
1 and 2, reference numeral 1 denotes a traveling machine body supported by a traveling body such as a pair of left and right front wheels 2 and a pair of left and right rear wheels 3, and the traveling machine body 1 includes a front portion thereof. The engine 4 and the steering handle 5 are provided side by side on the upper surface, and the control seat 6 and the traveling mission mechanism 7 are provided on the upper surface of the rear portion so as to overlap each other.
[0013]
Further, a pair of left and right thin metal plate cutting blades 8a rotating around a substantially vertical axis on the lower surface side of the traveling machine body 1 and between the front wheels 2 and the rear wheels 3; A rotary mower 8 consisting of 8b, a cover case 8c covering the whole of the both cutting blades 8a, 8b and opening the lower surface, and a discharge duct 8d extending rearward from the cover case 8c through the space between the rear wheels 3. However, it is mounted so that it can move up and down. In addition, the raising / lowering mechanism of this rotary mower 8 is abbreviate | omitted.
[0014]
The output shaft 4a of the engine 4 protrudes downward from the engine 4 and the rotation of the output shaft 4a is transmitted to the traveling mission mechanism 7 through the endless belt 9 to drive the rear wheels 3 to rotate. Thus, the traveling machine body 1 is configured to perform forward traveling or backward traveling.
[0015]
An intermediate shaft 10 is supported on the outer side in plan view (FIG. 2) from the support shaft 8a ′ of one of the cutting blades 8a, 8b in the plan view (FIG. 2). And an endless belt 13 is wound around the output pulley 12 on the output shaft 4a of the engine 4 to transmit the rotation of the engine 4 to the intermediate shaft 10, and another pulley 14 on the intermediate shaft 10 and , An endless belt 17 is wound around pulleys 15 and 16 on support shafts 8a 'and 8b' of both cutting blades 8a and 8b as shown in FIG. 3, and both cutting blades 8a and 8b are In the figure, the turfgrass is cut by rotating in the reverse direction in the forward direction indicated by the solid line arrow A, and the cut turf is cut along with the wind generated by the rotation of the cutting blades 8a and 8b in the forward direction. From the cover case 8c And it is configured to emit backward through the duct 8d out.
[0016]
The inter-shaft distance from the output shaft 4a to the intermediate shaft 10 is made equal to the inter-axis distance from the output shaft 4a to the support shaft 8a 'of the one cutting blade 8a, while the one cutting blade 8a A reverse rotation pulley 18 is fitted to the support shaft 8a ′, and the endless belt 17 for power transmission from the output shaft 4a to the rotary mower 8 is shown in FIG. 2 and FIG. The forward rotation pulley 11 is switched to the reverse rotation pulley 18, and the two cutting blades 8a and 8b are configured to rotate in the reverse direction indicated by a two-dot chain line arrow B in the drawing.
[0017]
On the other hand, as shown in FIGS. 4 and 5, the cutting blades 19 and the two-dot chain arrow B in the case where they are rotated in the positive direction indicated by the solid arrow A are formed at the tip portions of the two cutting blades 8a and 8b. In addition to providing a cutting blade 20 in the case of rotating in the opposite direction shown, a mountain-shaped portion 23 having inclined surfaces 21 and 22 are formed so that the cut grass cut by the two cutting blades 19 and 20 is lifted upward. . This chevron portion 23 also contributes to an increase in strength in both the cutting blades 8a and 8b.
[0018]
Moreover, when the cutting blades 8a and 8b are rotated in the reverse direction indicated by a two-dot chain line arrow B as shown in FIGS. Of the lower surface, the cutting blade 20 is provided with an upward bulging portion 25 having an inclined surface 24 that is inclined downward in the inner portion.
[0019]
In this configuration, while the traveling machine body 1 is traveling forward, the rotary mower 8 is moved down so as to approach the ground, and both the cutting blades 8a and 8b are driven to rotate in the positive direction indicated by the solid arrow A, thereby Can be cut to a predetermined height, and the cut grass is cut back from the cover case 8c through the discharge duct 8d.
[0020]
Next, the endless belt 17 for power transmission to the rotary mower 8 is changed from the forward rotation pulley 11 to the reverse rotation pulley 18, and both the cutting blades 8a and 8b are reversed as indicated by a two-dot chain line arrow B. By rotating and driving in the direction, the mowing turf that has been cut can be distributed widely so that it can be spread over the ground in the cover case without being discharged from the cover case 8c through the discharge duct 8d. It can be carried out.
[0021]
During this mulching operation, the cutting blades 8a and 8b are provided at the front end portions thereof with a cutting blade 20 when rotating in the opposite direction, and with an inclined surface 24 that is inclined downward. Thus, cutting when rotating in the reverse direction indicated by the two-dot chain line arrow B can be performed in the same manner as when rotating in the normal direction indicated by the solid line arrow A, and in the reverse direction indicated by the two-dot chain line arrow B The cutting lawn cut when rotating can be cut more finely than when the inclined surface 24 is not provided, such as cutting with the cutting blade 20 again while pressing against the ground side with the inclined surface 24. Can be distributed widely and evenly.
[0022]
In the embodiment, the endless belt 17 for transmitting power to the rotary mower 8 is replaced with the pulley for reverse rotation 18 from the pulley 11 for normal rotation, so that both the cutting blades 8a and 8b are moved in the forward direction. However, the present invention is not limited to this mechanism. The present invention is not limited to this mechanism, and the endless belt 17 can be replaced by staking or a reverse rotation mechanism using a gear or the like. Needless to say, the mechanism may be switched from the forward rotation to the reverse rotation by the above mechanism.
[Brief description of the drawings]
FIG. 1 is a side view of a traveling lawn mower according to an embodiment of the present invention.
FIG. 2 is a plan view of FIG.
FIG. 3 is a plan view showing a power transmission unit to a rotary mower.
FIG. 4 is a perspective view showing a front end portion of a cutting blade.
FIG. 5 is a side view taken along line VV in FIG. 4;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Front wheel 3 Rear wheel 4 Engine 8 Rotary mower 8a, 8b Cutting blade 8a ', 8b' Cutting blade support shaft 8c Cover case 8d Discharge duct 10 Intermediate shaft 11 Forward rotation pulley 17 Endless belt 18 Reverse rotation Pulley 19, 20 Cutting blade
24 Inclined surface

Claims (1)

A traveling body supported by a traveling body such as a wheel, a pair of left and right cutting blades that rotate in opposite directions with the axis substantially vertical, a cover case that covers both the cutting blades, and a positive direction in the both cutting blades A traveling lawn mower equipped with a rotary mower equipped with a discharge duct for discharging the cut lawn cut by rotation to the outside of the cover case,
Rotation direction of both cutting blades in the rotary mower to the power transmission unit from the power source mounted on the traveling machine body to the rotary mower, the forward direction for discharging from the dust discharged from the mowing lawn, and the discharge duct of the mowing lawn Means are provided for selectively switching to the reverse direction in which the release from the blade is not performed, while the two cutting blades in the rotary mower are provided with the cutting blade in addition to the cutting blade when the cutting blade is rotated in the forward direction. A traveling lawn mower characterized by providing a cutting blade for rotating the blades in the reverse direction and an inclined surface for pressing the cut grass when rotating in the reverse direction to the ground side .

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