JPS6143962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lawn mower that can perform both horizontal mowing and vertical mowing with one lawn mower.

Lawn mowing methods can be roughly divided into horizontal mowing, which involves mowing parallel to the ground (horizontal), and vertical mowing, which mowing perpendicular to the ground. The former type of horizontal mowing is usually performed primarily.

However, if the grass grows too densely, if the leaves are lying on the side for a long time, if the stems and leaves grow low and spread out, or if there is satsuki (organic residue mainly consisting of dead grass and clippings) on the ground surface. If it accumulates, it will have a negative effect on the growth of the grass, so vertical mowing of the latter also needs to be done at an appropriate frequency.

However, with conventional lawn mowers, it was not possible to perform both horizontal mowing and vertical mowing, so at golf courses, etc., there are lawn mowers that perform horizontal mowing and lawn mowers that perform vertical mowing. The disadvantage was that it required both.

The present invention was made in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide a lawn mower that can perform both horizontal mowing and vertical mowing with a single lawn mower.

A lawn mower according to the present invention includes a vehicle body, a front roller rotatably supported at the front of the vehicle body, a rear roller rotatably supported at the rear of the vehicle body, and a front roller and a rear roller rotatably supported at the rear of the vehicle body. A rotary blade supported rotatably around a rotation axis parallel to the ground surface between the rear roller, a receiving blade that is rubbed against the rotary blade, and a power that drives and rotates the rear roller and the rotary blade. In the lawn mower, the rotary blade is driven and rotated by the power source and cooperates with the receiving blade to mow the lawn parallel to the ground surface. a vertical blade shaft support member supported movably in a direction; a means for fixing the vertical blade shaft support member at an arbitrary position with respect to the vehicle body; and a means for fixing the vertical blade shaft support member to the front roller and the rotary blade. a vertical blade shaft rotatably supported so as to extend parallel to the ground surface between the two; a vertical blade attached to the vertical blade shaft in a direction perpendicular to the vertical blade shaft; and a power transmission mechanism that can be linked to or separated from the power source.

Hereinafter, the present invention will be explained in more detail based on embodiments shown in the drawings.

1 to 6, a pair of left and right rear roller shafts 2 are rotatably supported at the rear of a vehicle body 1, and a pair of left and right rear rollers 3 are attached to these rear roller shafts 2, respectively. ing. On the other hand, a pair of left and right front roller shaft support members 4 are supported at the front part of the vehicle body 1 so as to be able to rise and fall freely, and front rollers 5 are rotatably supported at the lower ends of these front roller shaft support members 4, respectively. is supported by

A nut receiving part 6 is integrally provided at the upper end of the front roller shaft supporting member 4, and a height adjusting nut 8 is attached to the nut receiving part 6 so that the height adjusting nut 8 is attached to the front roller shaft supporting member 4. They are fitted together so that they cannot be moved up and down. Further, the height adjustment nut 8 is screwed onto a threaded rod 7 that extends in the vertical direction, and the lower end of this threaded rod 7 is fixed to the vehicle body 1.

Therefore, when the height adjustment nut 8 is rotated,
The front roller shaft support member 4 moves up and down with respect to the vehicle body 1 together with the height adjustment nut 8, and the distance between the vehicle body 1 and the front roller 5 is adjusted. The vehicle body 1 is provided with a lock mechanism 9 for more firmly fixing the front roller shaft support member 4, which has been raised and lowered to a desired position by the rotation of the height adjustment nut 8, to the vehicle body 1 as described above. ing.

As shown in FIG. 3, a rotary blade shaft 10 is rotatably supported on the vehicle body 1, and the rotary blade shaft 10 and the rear roller shaft 2 are connected by an engine 11 mounted on the vehicle body 1. , and is driven and rotated via pulleys, belts, differential gears, clutches, etc. (not shown). The rotary blade shaft 10
A rotary blade 13 formed by combining an appropriate number of spirally bent blades 12 (see FIG. 1) is fixed to the holder. Further, a right vertical blade shaft support member 14 is rotatably supported on the rotary blade shaft 10 at its right end, and a gear 15 is fixed thereto.

The vertical blade shaft support member 14 includes a vertical blade shaft 16.
The right end portion of the gear and the intermediate gear shaft 17 are detachably and rotatably supported. An intermediate gear 18 is fixed to the intermediate gear shaft 17, and a rotating piece 19 is rotatably supported. Said rotating piece 1
The intermediate gear shaft 20 rotatably supported by the
An intermediate gear 21 is fixed, and this intermediate gear 2
1 is constantly meshed with the intermediate gear 18, and
Depending on the rotational position of the rotation piece 19, the rotation piece 19 may or may not be engaged with the gear 15. Further, the intermediate gear 18 is always meshed with a gear 22 fixed to the vertical blade shaft 16.

A compression spring 23 is interposed between the rotating piece 19 and the vertical blade shaft support member 14.
3 urges the rotary piece 19 in the direction in which the intermediate gear 21 moves away from the gear 15 (direction E in FIG. 3).

The vertical blade shaft support member 14 includes gears 15,
A cover 24 that covers 18, 21, 22 and the rotating piece 19 is detachably attached, and a clutch knob shaft 25 is rotatably attached to the cover 24 in the same direction as the intermediate gear shaft 17. Supported. Cover 2 of this clutch knob shaft 25
4 has a clutch knob 5 on the end protruding outside.
0 is attached (see Figure 2).

On the other hand, the cover 24 of the clutch knob shaft 25
A protrusion 26 is fixed to the inner end. This protrusion 26 is connected to a recess 27 provided in the rotating piece 19.
The protrusion 26 is adapted to come into sliding contact with the
When is in the position shown by the dashed-dotted line in Fig. 3, the rotating piece 1
9 is tilted toward the rotary blade shaft 10 side against the compression spring 23, and the gear 15 and the intermediate gear 21 are engaged with each other, while the protrusion 26 is at the position shown by the two-dot chain line in FIG. The rotating piece 19 is rotated by the spring 23, so that the intermediate gear 21 is separated from the gear 15.

A nut receiving portion 28 is provided on the right side of the vehicle body 1.
is integrally provided, and this nut receiving part 2
8, a height adjustment nut 31 is fitted to the vehicle body 1 such that it cannot move diagonally up and down. Further, the height adjustment nut 31 is screwed onto a threaded rod 29 extending diagonally up and down. It is rotatably supported.

As shown in FIG. 6, an arc-shaped left vertical blade shaft support member 32 is fitted into the left side surface of the vehicle body 1 so as to be movable up and down. A nut receiving member 33 is rotatably supported on this vertical blade shaft supporting member 32, and a height adjusting nut 3 is mounted on the vertical blade shaft supporting member 32.
5 is fitted to the member 33 so as to be immovable in the axial direction relative to the member 33.

Further, the height adjusting nut 35 is screwed onto a threaded rod 34 extending obliquely in the vertical direction, and the lower end of the threaded rod 34 is fixed to the vehicle body 1. The vehicle body 1 is provided with a lock mechanism 51 for firmly fixing the vertical blade support member 32 to the vehicle body 1.

A left end portion of the vertical blade shaft 16 is detachably and rotatably supported at the lower end portion of the vertical blade shaft support member 32 . As shown in FIGS. 4 and 5, this vertical blade shaft 16 has a large number of vertical blades 36 having an appropriate number of radially extending cutting edges 36a, which are spaced from each other at appropriate intervals by spacers 37.
It is mounted perpendicularly to the shaft 16.

A blade support member 38 is rotatably supported on the vehicle body 1, and the blade support member 38 includes:
A receiving blade 39 that is rubbed against the rotary blade 13 is attached. The receiving blade 39 is adapted to adjust its fit with the rotary blade 15 by adjusting the rotational position of the receiving blade support member 38 by an adjustment device (not shown).

A handle 40 is attached to the rear end of the vehicle body 1, and the handle 40 includes an accelerator lever 41 for adjusting the rotation speed of the engine 11;
A clutch lever 4 that turns on and off the clutch interposed between the engine 11 and the rotary blade shaft 10
2. A brake lever 43 is attached to operate a brake (not shown) for braking the rear roller shaft 2.

A bucket belt 44 is detachably attached to the front end of the vehicle body 1 (only FIGS. 2 and 7 show a state in which the bucket trunk 44 is attached). The main body 1 also includes a rotary blade 1.
A rotary blade cover 45 is provided that surrounds the periphery of the bucket 3 and extends toward the entrance of the bucket 44.

Next, the operation of this embodiment will be explained.

When the engine 11 drives and rotates the rear roller 3 in the direction of arrow A via the power transmission mechanism and the rear roller shaft 2, the lawn mower moves forward.

When vertical mowing and horizontal mowing are desired, the engine 11 also rotates the rotary blade 13 in the direction of arrow B (same direction as the rotation direction of the rear roller 3) via the rotary blade shaft 10, and 26 at the position shown by the dashed dot line in FIG.
1 is meshed with gear 15.

Then, the rotational motion of the rotary blade shaft 10 is also transmitted to the vertical blade 36 via the gear 15, the intermediate gears 21, 18, the gear 22, and the vertical blade shaft 16, and the blade 36 moves in the direction of arrow C, that is, the rear roller. 3 and the rotating blade 13 in the opposite direction. This results in
Each of the vertical blades 36 performs the vertical mowing to cut long leaves that lie horizontally, stems and leaves that grow low and spread, and scrape out the grass that has accumulated on the ground surface.

The grass clippings and scraped grass are removed from the rotary blade cover 45 by the rotation of the rotary blade 13.
along the arrow F, bucket 44
contained within.

The distance between the vertical blade shaft 16 and the ground surface can be determined by rotating the height adjustment nut 31 and adjusting the distance between the vertical blade shaft support member 14.
Adjustment can be made by rotating the height adjusting nut 35 and raising and lowering the vertical blade shaft support member 32.

Further, as the rotary blade shaft 10 is rotated as described above, the rotary blade 13 is also rotated, so the grass is cut between the blades by the rotation of the rotary blade 13 and the receiving blade 39, and the horizontal mowing is performed. It will be done.

The mowing height of the lawn in this horizontal mowing can be adjusted by rotating the height adjustment nut 8 and adjusting the distance between the front roller 5 and the vehicle body 1. The cutting debris resulting from this horizontal mowing is also blown away along the rotary blade cover 45 by the rotation of the rotary blade 13, and is stored in the bucket 44 as indicated by arrow F.

In addition, in this lawn mower, the grass pressed down by the front roller 5 is moved by the vertical blade 36 that rotates in the opposite direction to the front roller 5.
Since the grass is stirred up by the rotary blade 13 and the receiving blade 39, horizontal mowing can be performed even better.
And the grass grain is also adjusted.

If it is desired to perform only horizontal mowing without vertical mowing, the protrusion 26 is rotated in the direction of arrow D in FIG. 3 by rotating the clutch knob 50. Then, due to the restoring force of the spring 23, the rotating piece 19
rotates in the direction of arrow E, and gear 15 and intermediate gear 21
Even if the rotary blade shaft 10 rotates, the vertical blade 36 will not rotate.

Furthermore, in this embodiment, a rotating brush 46 as shown in FIG. 7 can be attached to the vertical blade shaft support members 14 and 32 instead of the vertical blade shaft 16. Such a rotating brush 46
If the front roller 5 is installed, of course the vertical mowing will not be performed, but the grass pressed down by the front roller 5 will be
The grass is stirred by the rotary brush 46 that rotates in the opposite direction to the front roller 5, and the stirred grass is immediately cut by the rotary blade 13 and the receiving blade 39, so horizontal mowing can be performed well and the grass grain can be adjusted. Ru.

Furthermore, in this embodiment, when moving the lawn mower to a place where horizontal mowing and/or vertical mowing is performed, wheels (not shown) having a diameter larger than that of the rear roller 3 are attached to the rear roller shaft 2. Only the wheels of the rear roller 3 are in contact with the ground surface, and the rear roller 3 is not in contact with the ground surface, and the engine 11 drives the rear roller shaft 2.
The lawn mower is moved by driving and rotating the wheels via the mower.

As described above, according to the present invention, (a) not only the rotary blade that cuts the lawn parallel to the ground surface, but also the vertical blade that rotates perpendicular to the ground surface is provided, so one lawn mower can cut the lawn. , can perform both horizontal and vertical mowing.

(b) Since a vertical blade is provided between the front roller and the rotating blade, the grass held down by the front roller is stirred up by the vertical blade that rotates in the opposite direction to the front roller.
Since the stirred grass is immediately cut by the rotary blade and the receiving blade, mowing is performed better than horizontal mowing, and the grass grain is also adjusted.

(c) Since the height of the vertical blade axis relative to the ground surface can be adjusted, vertical mowing can be performed appropriately depending on the situation.

(d) Since the vertical blade shaft can be separated from the power source such as an engine, it is also possible to perform only horizontal mowing without performing vertical mowing.

You can obtain excellent effects such as

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the lawn mower according to the present invention, FIG. 2 is a side view of the embodiment seen from both left sides, and FIG. 3 is an enlarged view of the main parts of the embodiment. 4 is a front view showing the vertical blade and the vertical blade axis in the embodiment, FIG. 5 is a sectional view taken along the line - in FIG. 4, and FIG. 6 is the front end of the right side of the vehicle body in the embodiment. FIG. 7 is a side view showing only the vicinity, and FIG. 7 is a side view showing a state in which a rotating brush is attached instead of the vertical blade in the above embodiment. 1...Vehicle body, 3...Rear roller, 5...Front roller, 11
...Engine, 13...Rotary blade, 14...Vertical blade shaft support member, 15...Gear, 16...Vertical blade shaft, 17, 18
...Intermediate gear, 19...Rotating piece, 21...Intermediate gear, 2
2... Gear, 23... Compression spring, 25... Clutch knob shaft, 26... Protrusion, 27... Recess, 29... Threaded rod,
31...Height adjustment nut, 32...Vertical blade shaft support member, 34...Threaded rod, 35...Height adjustment nut, 36
...Vertical blade, 39...Receiving blade, 46...Rotating brush, 51
...Lock mechanism.

Claims (1)

[Claims] 1 a vehicle body, a front roller rotatably supported at the front of the vehicle body, a rear roller rotatably supported at the rear of the vehicle body, and a vehicle between the front roller and the rear roller; The rotary blade is rotatably supported around a rotation axis parallel to the ground surface, a receiving blade that is rubbed against the rotary blade, and a power source that drives and rotates the rear roller and the rotary blade. In the lawn mower, the rotary blade is driven and rotated by the power source and cooperates with the receiving blade to mow the lawn parallel to the ground surface. a vertical blade shaft support member, a means for fixing the vertical blade shaft support member at an arbitrary position with respect to the vehicle body, and a means for fixing the vertical blade shaft support member to the ground surface between the front roller and the rotary blade. a vertical blade shaft rotatably supported so as to extend in parallel; a vertical blade attached to the vertical blade shaft in a direction perpendicular to the vertical blade shaft; and linking the vertical blade shaft to the power source. and a power transmission mechanism that can be separated from the power source.