JP3055647B2 - Mower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing machine which is effective for mowing grass, such as ridges and ridges, in addition to the mowing work on flat ground, in which case the labor is reduced and the workability is improved. .

[0002]

2. Description of the Related Art Conventionally, a main rotary blade that rotates along a substantially horizontal plane and a sub rotary blade that rotates along a substantially inclined surface are provided on the left and right, and the sub rotary blade is disposed in front of the main rotary blade. A mowing method in which the two rotating blades are overlapped in the left-right direction, and the rotating directions of the two rotating blades are both rotated in plan view from the sub-rotating blade side toward the main rotating blade side on the front side. Machine has been proposed (Japanese Unexamined Patent Publication No.
3083 7 JP).

[0003] The mowing machine having the above construction is provided with a steered wheel at a front portion of a main rotary blade and a sub rotary blade, and a rear wheel and an operation handle at a rear portion. Is performed.

[0004]

As described above, a cutting blade for mowing a horizontal plane (hereinafter simply referred to as a "plane cutting blade").
In addition, a mowing machine provided with a mowing blade (hereinafter, simply referred to as a "slope mowing blade") for mowing an inclined surface (slope) that can be tilted up and down on one side is used to cut ridges and ridges. When mowing work is performed, the mowing machine body naturally bends toward the slope side due to the load resistance (mowing resistance) of the slope cutting blade and its own weight, and the work may be troublesome.

[0005] Therefore, the operator must perform the operation while correcting the traveling direction by the operation handle, which burdens the operator, and leaves a problem in the work efficiency.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and reduces the load resistance (grass cutting resistance) on the slope cutting blade side to maintain and improve the straight running operability during work.
An object of the present invention is to enhance the effect of scraping grass that has been cut on a slope to reduce the amount of grass collecting work after mowing.

[0007]

The present invention solves the above problems.
Order to solve the rotation of the plane cutting blade and slope cutting blade,該法surface cutting
The blade is configured to rotate in the same direction as the rotating direction in which the blade scrapes the cut grass along the slope, and the rotation speed of the slope cutting blade is higher than the rotation speed of the plane cutting blade.

[0008] Specifically, a plane cutting blade and a vertically-sloping slope cutting blade are provided between a front guide wheel and a rear running rear wheel.
And the slope cutting blades are located on one of the left and right sides behind the plane cutting blade.
Positioned and overlaps the plane cutting blade by a predetermined width in the left-right direction
So that the flat cutting blade is turned
In the turning direction, the slope cutting blade scrapes the cut grass along the slope
As well as in the gel the same direction as the rotation direction, the rotation speed of the slopes cutting blade, in which higher than the rotational speed of the flat cutting blade.

[0009]

According to the present invention, in the mowing work on a flat ground, the slope cutting blade 6 is lifted, or the slope cutting blade 6 is used in a horizontal state similarly to the plane cutting blade 5. In addition, when it is necessary to cut the slope in addition to the flat ground such as a ridge, the slope cutting blade 6 is used by inclining it downward or upward.

At this time, the traveling direction of the body of the mower is naturally downward (slope) due to the load resistance (mowing resistance) and own weight of the slope cutting blade 6 inclined downward. In the present invention, since the rotation speed of the slope blade 6 is higher than the rotation speed of the plane cutting blade 5 in the present invention, the rotation speed of the slope blade 6 is lower than the load resistance (cutting resistance) of the plane cutting blade 5. Face cutting blade 6
Low load resistance (mowing resistance).

[0011] Therefore, the straight running operability of the body of the mowing machine is improved as compared with the case where the rotation speeds of the plane cutting blade 5 and the slope cutting blade 6 are the same, thereby reducing labor and improving workability.

Further, since the rotation speed of the slope cutting blade 6 is configured to be high, the cut grass is scraped up from the downward slope, and the cut grass is collected behind the flat cutting blade 5. And
Reduction of grass collected work is Ru been achieved. Further, the slope cutter blade 6, Rights
The cutting blade 5 overlaps the specified width X in the horizontal direction
Since there is provided such that without developing the cutting leaving the mowing of ridges or the like, and further the rotational direction of the plane cutting blade 5, slopes
Same as the direction in which the cutting blade 6 lifts the cut grass along the slope.
Since the cut is made in one direction, the cut grass is collected in the same direction, the spread is prevented, and the subsequent processing is easy.

[0013]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an apparatus embodying the present invention. 1 is a perspective view of a mower according to an embodiment of the present invention, FIG. 2 is a front view, and FIG. 3 is a schematic plan view showing a drive system.

The body 13 of the mower in the embodiment shown in FIG.
It is self-propelled. That is, a prime mover 1 such as an air-cooled two-cycle gasoline engine is provided at the center, a guide wheel 2 is provided at a front portion, and a traveling rear wheel 3 and an operation handle 4 are provided at a rear portion. In the illustrated embodiment, the rear wheel 3 is driven to rotate by the prime mover 1.

Further, between the guide wheel 2 and the rear running wheel 3, there is provided a plane cutting blade 5 rotated by the prime mover 1 and a rear end of the plane cutting blade 5 on one side (in the illustrated example, left side) in the traveling direction. A slope cutting blade 6 is provided, which can be tilted up and down in an overlapping state. That is, the cutting blades 5 and 6 are displaced in the front-rear direction of the machine body 13 and the left and right sides in the traveling direction are overlapped with each other by a predetermined width X shown in FIG.

[0016] Next, we describe the driving of the traveling rear wheel 3, as shown in FIG. 3, a wheel drive pulley 7 provided on the output shaft 1a which projects downwardly of the engine 1,
A transmission pulley 8 which is rotatably supported in the vicinity of the traveling rear wheel 3, between <br/> the transmission belt 9 of loosening is suspended, further rotation of the transmission pulley 8, not shown details deceleration Apparatus 10
, The vehicle is decelerated and changed direction, and further transmitted to the traveling wheels 3 via a chain or the like.

In the drawing, reference numeral 11 denotes a traveling clutch, which has a base end on a swinging end of a swinging lever 14 pivotally supported by the pin 12 on the side of the machine body 13 and a substantially middle portion of the transmission belt 9 from outside to inside. A tension roller 15 is provided which can be pressed against the swing lever 14 and a link 1 is provided on the base end side of the swing lever 14.
6 and 17 are connected, and although not shown in detail, the link 1
7 is a traveling clutch lever provided on the operation handle 4
It is configured so that it can be pulled and further pulled.

That is, in a state where the traveling clutch lever 18 is not pulled, the transmission belt 9 suspended between the wheel drive pulley 7 and the transmission pulley 8 even if the motor 1 is started. , The rotation of the wheel drive pulley 7 is not transmitted to the transmission pulley 8.

However, after starting the prime mover 1, when the traveling clutch lever 18 is pulled at a work site or the like, the wheel drive pulley 7 and the transmission pulley 8 are pulled.
The tension roller 15 is pressed from outside the loosened power transmission belt 9 suspended between the tension rollers 15.

As a result, the transmission belt 9 is tensioned to a predetermined tension between the wheel driving pulley 7 and the transmission pulley 8, and the transmission belt 9 and the wheel driving pulley 7 and the transmission The rotation of the wheel drive pulley 7 is transmitted to the transmission pulley 8 by frictional resistance between the pulleys 8, and further,
The speed is reduced and the rotation direction is changed by the speed reducer 10 and transmitted to the rear wheel 3, and the rear wheel 3 is rotated to enable traveling.

Next, the rotation mechanism of the flat cutting blade 5 and the side cutting blade 6 will be described. In the present invention, the rotation direction of the flat surface cutting blade 5 and the side surface cutting blade 6 is controlled by the side surface cutting blade 6.
The same direction as the rotating direction that scrapes the cut grass along the slope
And, further, the flat cutting blade 5 the rotational speed of the slopes cutter blade 6
It is set higher than the rotation speed .

First, referring to the rotation mechanism of the plane cutting blade 5, as shown in FIG.
A loose transmission belt 21 is suspended between a cutting blade drive pulley 19 provided on the rotating blade 5a and a transmission pulley 20 provided on the rotating shaft 5a of the flat cutting blade 5.

Further, a swing lever 23 is pivotally supported on the body 13 outside the transmission belt 21, and a tension roller 22 provided at the swing end of the swing lever 23 is provided at a substantially intermediate portion of the transmission belt 21. It is configured to be located outside.

A base end of the swing lever 23 is connected to a cutting blade clutch lever 24 provided on the operation handle 4 by a board wire 25, and the cutting blade clutch lever 24 is connected to a lever shown in FIG. By pulling the guide 24c to the first-stage locking portion 24a, the transmission belt 21
The tension roller 22 is pressed to the outside of the shaft to tension the transmission belt 21, and the rotation of the cutting blade drive pulley 19 is transmitted to the transmission pulley 20 to rotate the plane cutting blade 5. Configuration.

Next, an example of a rotation mechanism of the slope cutting blade 6 will be described. The slope cutting blade 6 is supported by a support shaft 26 provided on the body 13 on one side (left side in the illustrated example) of the plane cutting blade 5 so that the outside direction is tilted up and down. .

Further, the rotation of the slope cutting blade 6 is transmitted from a transmission pulley 27 provided on the rotating shaft 5a of the flat cutting blade 5, and even when the flat cutting blade 5 is rotated, usually, the rotation of the flat cutting blade 5 is usually reduced. It does not rotate in conjunction with it, however, if necessary, it can also be rotated in the same direction at the same time as the plane cutting blade 5.

Further, in the present invention, as described above, the rotation speed of the sloped blade 6 is configured to be higher than the rotation speed of the flat blade 5. That is, a loose transmission belt 29 is suspended between the transmission pulley 27 and a transmission pulley 28 having a smaller diameter than the transmission pulley 27 supported by the body 13. Next, a bevel gear 30 is provided integrally with the rotation shaft 28a of the transmission pulley 28, and the transmission shaft 31 is supported by the bevel gear 30 so as to extend rearward along the body 13 on the side of the slope cutting blade 6. The bevel gear 32 provided at the front end of the gear is engaged.

Further, a timing pulley 33 is provided at the rear end of the transmission shaft 31, and the timing pulley 3
The movable rod 3 swingable up and down around the timing pulley 33 extending from the support portion 3 to the front side of the slope cutting blade 6.
A timing belt 36 is suspended in the movable rod 34 between the timing pulleys 35 supported at the distal end of the movable rod 4.

Further, a connecting rod 37 is connected coaxially with the timing pulley 35 at the distal end of the movable rod 34 so as to freely swing up and down. A timing belt 40 is suspended in the connecting rod 37 between a timing gear 38 coaxial with the lee 35 and a timing pulley 39 provided on the swing end side.

The timing pulley 39 provided on the swinging end side of the connecting rod 37 is connected to the slope cutting blade 6.
The rotation shaft 42 of the timing pulley 39 extends rearward toward the center of the cover 41 in parallel with the support shaft 26. Further, a bevel gear 43 provided at the rear end of the rotating shaft 42 is engaged with a bevel gear 44 provided at the upper end of the rotating shaft 6a of the slope cutting blade 6.

According to the rotating mechanism of the slope cutting blade 6, the rotation of the slope cutting blade 6 can be performed even when the outer edge (left side) of the slope cutting blade 6 is moved up and down. Can be maintained.

In the drawing, reference numeral 45 denotes a support rod for adjusting and maintaining the inclined state of the slope cutting blade 6. The outer end is pivotally supported by the cover 41, and an appropriate number of adjustment holes are provided on the inner end side. An adjustment hole, which is provided on an arc and maintains the required inclination,
A pin 46 provided on the side is inserted and fixed. Reference numeral 47 denotes a gripping rod for assisting the operation of vertically moving the slope cutting blade 6 when adjusting the inclination of the slope cutting blade 6.

Next, the actual rotation operation of the slope cutting blade 6 will be described. As described above, the slope cutting blade 6 does not rotate when the plane cutting blade 5 is rotated, but can be rotated simultaneously with the plane cutting blade 5 if necessary. It has become.

That is, when the slope cutting blade 6 is also rotated following the rotation operation of the plane cutting blade 5, the tension roller 48 is pressed against the transmission belt 29 from the outside thereof. The transmission belt 29 may be tensioned.

Although not shown in detail, the tension roller 48 is provided with the transmission belt in conjunction with the movement of the swing lever 23 having the tension roller 22 for rotating the flat cutting blade 5. 29, the transmission belt 29 is tensioned, and the operation is performed by the cutting blade clutch lever 24 provided on the operation handle 4.
The second stage locking portion 2 of the lever guide 24c shown in FIG.
4b.

As described above, the cutting blade clutch lever-2
4 is pulled to the second-stage locking portion 24b, the tension roller 48 tensions the transmission belt 29. As a result, the rotation of the transmission pulley 27 is
To bevel gear 30, bevel gear 32,
Transmission shaft 31, timing pulley 33, timing belt 36, timing pulley 35, timing pulley 38, timing belt 40, timing pulley 3
9, from the rotating shaft 42 and the bevel gear 43, the bevel gear 44 provided on the upper end of the rotating shaft 6a of the slope cutting blade 6 rotates the slope cutting blade 6 in the same direction as the plane cutting blade 5.

The transmission shaft 31 is connected to the rotating shaft 42.
If a V-pulley with a too small diameter is used to compact the power transmission system leading to the above, the power transmission efficiency will be extremely reduced, so that the timing pulley and the timing belt are engaged as in this embodiment. Is preferred.

Further, in the present invention, as described above, the transmission pulley 2 provided on the rotating shaft 5a of the flat cutting blade 5 is provided.
In order to rotate the slope cutting blade 6 via the transmission pulley 28 having a diameter smaller than 7, the rotation of the slope cutting blade 6 when both the cutting blades 5 and 6 are simultaneously rotated. The number is higher than the plane cutting blade 5. However, the configuration in which the number of rotations of the side surface cutting blade 6 is higher than that of the plane cutting blade 5 is not limited to the above-described configuration.

According to the above configuration, the rotation speed of the sloped cutting blade 6 is higher than the rotation speed of the plane cutting blade 5.
The load resistance (grass cutting resistance) of the slope blade 6 is smaller than the load resistance (grass cutting resistance).

Therefore, the straight traveling performance of the mower can be improved as compared with the case where the rotation speeds of the plane cutting blades 5 and the slope cutting blades 6 having the same dimensions are the same, thereby reducing labor and improving workability. Can be

Further, since the rotation speed of the slope cutting blade 6 is high,
Sweeping of the grass from the downward slope is performed well,
The cut grass is collected behind the plane cutting blade 5, and the grass collecting work is reduced.

In the figure, 50 is a throttle lever of the engine, 51 is a recoil starter, and 52 is an auxiliary wheel provided on the slope cutting blade 6.

[0043]

According to the present invention, in a mowing machine provided with a slope cutting blade that can be tilted up and down on one side, the straight-moving operability in simultaneous mowing work on a flat surface and a slope can be improved, and the slope can be improved. The effect of scraping the cut grass is enhanced, so that labor can be reduced and workability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mower according to an embodiment of the present invention.

FIG. 2 is a front view of the mower shown in FIG. 1;

FIG. 3 is a schematic plan view showing a drive system of the mower of FIG. 1;

[Explanation of symbols]

 2 Guide wheel 3 Running wheel 5 Plane cutting blade 6 Slope cutting blade

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01D 34/63-34/90

Claims (1)

(57) [Claims] And 1. A front portion of the guide wheels (2), and the rear portion of the traveling rear wheel (3), between a flat cutting blade (5), the free vertical tilting
A slope cutting blade (6), and the slope cutting blade (6)
The flat cutting blade (5) is located on one of the left and right sides behind the blade (5).
And a predetermined width (X) is overlapped in the left-right direction.
And the rotation direction of the plane cutting blade (5).
And the slope cutting blade (6) scrapes the cut grass along the slope.
As well as in the gel the same direction as the rotation direction, the rotation speed of the slopes cutter blade (6), formed by higher than the rotational speed of the flat cutting blade (5), mowers.