JPH08214665A - Walking type mower for levee - Google Patents

Abstract

PURPOSE: To provide a mower free from damaging rotating blades by foreign matters on the levee face which hides in grass and further, free from a fear of biting mud or foreign matters when the mower is inclined to the front direction during mowing operation and having good traveling stability. CONSTITUTION: This walking type mower for levee contains a main cutter base 2 equipped with a main rotating blade 43 arranged in the front of a traveling wheel 10 and fixing to a rotating shaft and capable of horizontally or nearly horizontally rotating and a movable cutter base 3 equipped with a subsidiary rotating blade 43a fixed to the rotating shaft and capable of rotating on the face crossing to the face in rotating direction of the main rotating blade 43 and installed so as to vertically oscillate to the main cutter base 2, and the main cutter base 2 and the movable cutter base 3 are laterally arranged in a row when viewed in the front. A main guide wheel 21 is provided in the front of the main rotating blade 43 and a subsidiary guide wheel 31 is provided in the front of the subsidiary blade 43a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a walking type ridge mower, and more particularly to a walking type ridge mower capable of performing stable mowing work even on an unstable ridge and protecting a rotary blade. Regarding the machine.

[0002]

2. Description of the Related Art For example, a hand-push type mower equipped with a prime mover is used in order to efficiently mow field ridges and road weeds. Most conventional mowers of this type are equipped with clipper-type mowing parts, and usually one fixed-type clipper is provided for each.

[0003]

However, the conventional mowers described above have the following problems. That is, since there is only one hair clipper, only one side can be mowed at a time. For this reason, when mowing grass in places such as rice field ridges that have slopes with different angles on both sides of the upper surface, it is necessary to reciprocate many times, such as the slope after the upper surface is finished, so efficiency is improved. It was bad. Also, clippers are structurally complex, tend to clog grass, and have a slow mowing speed. In addition, the blade wears quickly and cannot be cut in a short time. Furthermore, the grass was cut into small pieces without being cut into small pieces, and it was unsightly because it remained on the cut surface, and the cut grass decayed slowly, and the grass remained and became an obstacle.

By the way, the upper surface of the ridge is narrow and has many irregularities. Moreover, in many cases, the upper surface was convex and both sides were inclined toward the paddy field, so we had to always mow the grass in an unstable state. Therefore, unlike the case of mowing grass in a wide and flat place, the mower for ridges is required to have running stability.
In addition, there are foreign matter such as concrete piles and stones for boundaries on the ridge surface. These foreign objects are hidden in the grass and are difficult to see, and if they come into direct contact with the rotary blade, they damage the rotary blade. Furthermore, the mowing machine may lean forward during mowing work, but if there is no support in front, it will bite in mud and foreign matter,
May damage the rotary blade.

[0005]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a walking type ridge mower capable of stably mowing even on unstable ridges. Another object of the present invention is to prevent the direct contact with the rotary blade by detecting in advance that there is a foreign object such as a concrete pile or stone for the boundary of the ridge which is hidden in the grass and difficult to see. The purpose is to provide a walking type mower for ridges. Still another object of the present invention is a walk-behind type that prevents the forward leaning and prevents the pain of a rotary blade caused by biting mud or foreign matter even if a forward leaning of the mower occurs during mowing work. It is to provide a mower for ridges.

[0006]

Means for Solving the Problems The means of the present invention taken to solve the above problems are as follows. That is, the present invention is a main cutter base provided with a main rotary blade which is disposed in front of a traveling wheel and fixed to a rotary shaft to rotate horizontally or substantially horizontally, and a main cutter fixed to the rotary shaft of the main rotary blade. A movable cutter base that is provided so as to be capable of rotating up and down with respect to the main cutter base and that has a sub-rotary blade that can rotate in a plane that intersects a plane in the direction of rotation; The stand and the movable cutter base are walking type ridge mowers arranged side by side in a front view, and the mower is a main guide wheel provided in front of the main rotary blade, and A walking type ridge mower, comprising: a sub guide wheel provided in front of the sub rotary blade.

[0007]

[Operation] The angle between the main cutter base and the movable cutter base is adjusted according to the mowing work surface. When the work surface is a ridge and has a substantially horizontal upper surface and a slope inclined downward, the movable cutter base is inclined downward and set substantially parallel to the slope.

When the mowing machine is run on the upper surface of the ridge, the main rotary blade provided on the main cutter base mows the grass on the upper surface of the ridge, and at the same time the auxiliary rotary blade provided on the movable cutter base is removed. Mow grass on the ridge of the ridge. The rotating blades are preferably rotated in opposite directions to each other, but are not limited thereto.

The main guide wheel is provided in front of the main rotary blade, and the traveling device is arranged behind the main rotary blade. The auxiliary guide wheel is provided in front of the auxiliary rotary blade. Therefore, both the main guide wheels and the sub guide wheels can have a longer wheel base between them and the traveling wheels, so that straight running stability can be secured when traveling. For this reason, grass cutting work can be performed while ensuring straight-line stability even on a ridge road that is narrow in width and has many irregularities, and in many cases the upper surface is convex and both sides are inclined toward the paddy field. In addition, foreign matter such as concrete piles and stones for ridge boundary that are hidden by grass and are hard to see hit the main guide wheel and sub guide wheel before hitting the rotary blade, so it is possible to detect its existence in advance and it is appropriate. It is possible to take various avoidance measures. Furthermore, even if the mowing machine is in a state where it leans forward during mowing work, the main guide wheels and the auxiliary guide wheels support the mowing machine to prevent forward leaning, and rotation caused by biting mud or foreign matter It can prevent blade pain.

[0010]

The present invention will be described in more detail based on the embodiments shown in the drawings. FIG. 1 is a perspective view showing a first embodiment of a mower according to the present invention, FIG. 2 is an explanatory view of main parts of means for driving a rotary blade, and FIG. 3 is an angle adjusting device for a main cutter base and a movable cutter base. FIG. 4 is a perspective view showing a relationship between a main cutter base having a main rotary blade, a movable cutter base having a sub rotary blade, and a transmission shaft that links the main rotary blade and the sub rotary blade. It is explanatory drawing which notched.

Reference numeral C1 is a mower, which is provided with a self-propelled base 1. The self-propelled substrate 1 includes a frame F (shown in FIG. 3),
A prime mover E is mounted on the frame F. Traveling wheels 10 are provided below the frame F. The traveling wheel 10 is connected to the prime mover E via a drive transmission unit 11 including a pulley and a belt.
It is driven by, and can be easily replaced with separately prepared traveling wheels having different diameters. Reference numeral 12 is a steering wheel equipped with a brake, a clutch operation unit, and the like.

A main cutter base 2 is horizontally attached to the front portion of the frame F. The main cutter base 2 is a rectangular plate body, and a cover 20 is attached to one side edge portion thereof.
Further, a guide wheel 21 is provided on the front portion of the main cutter base 2 via a mounting member 210. On the guide wheel 21,
Cutting height adjusting means having the same structure as a guide wheel 31 described later is provided.

A movable cutter base 3 is vertically swingably attached to the other side edge of the main cutter base 2 via a hinge 29. A cover 3 is provided on the side edge of the movable cutter base 3.
0 is attached. Further, a guide wheel 31 is provided on the front part of the movable cutter base 3 via a mounting member 310.
A shaft tube 311 that constitutes cutting height adjusting means is provided at the tip of the mounting member 310 in the vertical direction. A guide shaft 313 provided on the axle 312 is inserted through the shaft tube 311. The shaft tube 311 is provided with a screw-type fixture 314 for fixing the guide shaft 313 at a required position.

Referring to FIG. An angle adjusting device is provided at the boundary between the main cutter base 2 and the movable cutter base 3 so that the angles formed by both can be set stepwise. The angle adjusting device has an adjusting plate 32 which is a semicircular plate. The adjusting plate 32 is erected by fixing almost half of the lower side to the rear end edge of the upper surface of the movable cutter base 3. Near the edge of the arc portion of the adjusting plate 32, a required number of engaging holes 33 arranged in an arc shape with the same radius centering on the hinge 29 are provided at equal intervals.

A clearance portion 22 is provided at the rear edge of the main cutter base 2 so that the adjusting plate 32 can slip through.
Is formed. In addition to the structure of the present embodiment, for example, when the main cutter base 2 is not provided with the escape portion 22 and the central angle of the adjusting plate 32 is formed to be slightly smaller, the movable cutter base 3 is rotated upward. It is also possible to adopt a structure in which the movable cutter base 3 is stopped by the contact between the edge of the adjusting plate 32 and the main cutter base 2.

A pin bearing 23 is provided in the frame F in correspondence with the engaging hole 33. An engagement pin 24, which is an engagement member that is operated to move in and out through the wire tube T, is provided at the tip of the pin bearing 23. The pin bearing 23 is attached at a position where the engaging pin 24 engages with the engaging hole 33 in the center when the main cutter base 2 and the movable cutter base 3 are in a parallel state. As a result, the movable cutter base 3 can be fixed by being tilted vertically at a required angle (by stepwise adjustment) about the parallel state with the main cutter base 2.

Please refer to FIG. 2 and FIG. Main cutter base 2
A main rotary blade 4 and a sub rotary blade 4a are attached to the center of the movable cutter base 3. Bearings 40 and 40a are provided above the main rotary blade 4 and sub rotary blade 4a, and gear boxes 41 and 41a are provided above the bearings 40 and 40a.

The bearings 40, 40a have a main cutter base 2
The rotary shafts 42 and 42a are rotatably supported through the movable cutter base 3. Below the rotary shafts 42, 42a, rotary blades 43 arranged linearly around the rotary shafts 42, 42a,
43a is attached. Each of the rotary blades 43, 43a is formed such that the central portion is inclined downward and the tip portion is horizontal.
The height of each rotary blade 43, 43a is the work surface (ground).
It is set so that it is located at an interval suitable for mowing.
Further, it is also possible to adopt a structure in which the height of each rotary blade 43, 43a can be adjusted.

Bevel gears 44 and 44a are attached to the upper ends of the rotary shafts 42 and 42a, respectively.
a is located in the gear box 41, 41a. A transmission shaft 5, which is a means for driving a rotary blade via bearings 45, 45a, is pivotally supported between the gear boxes 41, 41a.

The transmission shaft 5 is provided with a drive shaft 51 which is rotatably supported by the gear box 41, a driven shaft 52 which is rotatably supported by the gear box 41a, and a telescopic shaft 53 which connects them. A bevel gear 54 that engages with the bevel gear 44 of the rotary shaft 42 is attached to the drive shaft 51. A pulley 55 is attached to an outer end portion of the drive shaft 51, and an inner end portion thereof is connected to one end portion of a telescopic shaft 53 via a universal joint 56 which is a shaft joint. The pulley 55 is driven by the prime mover E via a belt 59.

A bevel gear 57, which meshes with the bevel gear 44a of the rotary shaft 42a, is attached to the driven shaft 52. The bevel gear 57 is mounted with the bevel gear 54 facing the tooth side, whereby the rotary blades 43, 43a are mounted.
Rotate in opposite directions. The inner end of the driven shaft 52 is connected to the other end of the expansion / contraction shaft 53 via a universal joint 58.

The telescopic shaft 53 has a three-stage spline structure, and, in combination with the action of the universal joints 56 and 58, the rotary blades 4 and 4a are preliminarily set at an angle between the main cutter base 2 and the movable cutter base 3. Within the set range, they can be linked regardless of the angle.

The rotary blades 43 and 43a of the rotary blades 4 and 4a are mounted so that the blade angles in plan view are shifted, and the rotary blades 43 and 43a are opposite to each other so as to hold grass. Since they rotate synchronously, the rotary blade 43,
Even when the tracks of 43a overlap, they do not come into contact with each other. In the present embodiment, the telescopic shaft 53 has a three-stage spline structure, but may have a two-stage type.

FIG. 5 is an explanatory view when one of the rotary blades is used by inclining downward, FIG. 6 is an explanatory view when using one of the rotary blades by inclining upward, and FIG. 7 is a traveling of different diameters. It is explanatory drawing at the time of using a wheel. The usage and operation of this embodiment will be described with reference to the drawings.

1. As shown in FIG. 5, the slope G2 is the upper surface G1.
On the other hand, when the surface is a downward slope, the mower C1 is first placed on the upper surface G1, and the height of the guide wheels 21 and 31 is set to the fixture 31.
Adjust with 4. Thereby, the cutting height of the rotary blade 4 is set. Next, the angle adjusting device is adjusted to adjust the angle of the movable cutter base 3, and the movable cutter base 3 is fixed so that the blade surface of the rotary blade 43a of the rotary blade 4a is substantially parallel to the slope G2. As a result, the mower C1 does not sway, and stable traveling is possible. At this time, the telescopic shaft 53 of the transmission shaft 5 is in a stretched state. Then, by driving the rotary blades 4 and 4a and running the grass mower C1, it is possible to mow grass on the upper surface G1 and the slope G2 on one side at the same time.

2. When the slope G2 'is an upslope with respect to the horizontal plane G3 as shown in FIG. 6, the mower C1 is first placed on the horizontal plane G3. Next, the angle adjusting device is adjusted to adjust the angle of the movable cutter base 3, and the rotary blade 4a is rotated by the rotary blade 4a.
The blade surface of 3a is fixed so as to be substantially parallel to the slope G2 'so that stable traveling can be performed. At this time, the telescopic shaft 53 of the transmission shaft 5 is in a contracted state. Then, by driving the rotary blades 4 and 4a and causing the mowing machine C1 to travel, grass on the horizontal plane G3 and the slope G2 'can be simultaneously mowed.

3. When the upper surface G1 which is the traveling surface of the mower C1 is inclined to one side, if the left and right traveling wheels 10 and 10 have the same diameter, the mower C1 itself is inclined and the straightness is stabilized. However, as the vehicle travels, it gradually bends to the lower side of the slope, making it impossible to mow the slope G2. Therefore, it is necessary to correct the direction frequently during the work. This requires a considerable amount of force, which makes the work difficult.

Therefore, as shown in FIG. 7, if the traveling wheel on the side corresponding to the lower slope of the upper surface G1 is replaced with the traveling wheel 10a having a slightly larger diameter to correct the inclination of the mower C1, a large-diameter traveling is achieved. The force that the wheel 10a tends to bend to the upper side of the slope cancels out the resistance of the mowing part of the mowing machine C1 and the force that tries to fall to the lower side of the slope due to the slope of the upper surface G1, and the straightness of the mower C1 is stabilized. , Can work efficiently.

As described above, the mower C according to the present invention
According to 1, since the mowing work such as the slope of the ridge can be performed at the same time as the horizontal plane, the traveling distance of the mowing machine C1 at the time of work can be smaller than that of the conventional mowing machine which can work only one surface at a time, and the efficiency can be improved. You can do specific work.

Further, since the mowing section is not the hair clipper or the like but the rotary blade, the mowing section is less likely to be clogged with grass and a quick operation can be performed. Furthermore, the grass is finely cut and sprinkled on the work surface, so that the work surface is clean and the cut grass easily decays and disappears quickly.

Further, when the work surface is a wide flat surface, if the main cutter base 2 and the movable cutter base 3 are fixed in parallel as shown in FIG. You can mow.

Further, when the work surface is not flat and wavy, the movable cutter base 3 can be freely swung by releasing the engagement of the engaging pin 24, so that the rotary blade 4a You can follow the undulating work surface and mow the grass cleanly.

FIG. 8 is a perspective view showing a second embodiment of the mower according to the present invention, and FIG. 9 is a perspective view of an angle adjusting device for the main cutter base and the movable cutter base. Since the grass mower C2 has a similar structure to the grass mower C1 in a rough part,
Here, different points will be described.

The traveling wheel 10 of the mower C2 is a single wheel.
The guide wheel 21 provided on the main cutter base 2 is attached to the tip of a support leg member 210 that is rotatably supported by a support member 212 by a shaft pin 211. Further, the tip of the cutting height adjusting lever 6 is fixed to the base of the supporting leg member 210.

The base of the cutting height adjusting lever 6 is extended to a position below the handle 12 so that an operator can operate it by hand, and the cutting portion 61 is provided on the cutting height adjusting board 60 in a plurality of stages.
It has been suspended. The shaft 121 of the handle 12 is inserted in the bearing tube 120. The bearing tube 120 has a tightening fixture 122 so that the height and orientation of the handle 12 can be adjusted.

According to this structure, the supporting leg member 210 is rotated by the vertical operation of the cutting height adjusting lever 6, and the guide wheel 21 is rotated.
Of the rotary blades 43, 43a can be adjusted. The movable cutter base 3 is detachable from the hinge 29, and the transmission shaft 5 is also detachable from the gear box 41.

Referring to FIG. In this embodiment, the main cutter base 2 is provided with a swing control device capable of controlling the swing of the movable cutter base 3 that is swingably provided. The swing control device has a control plate 34. The control plate 34 is erected by fixing almost half of the lower side to the upper surface of the movable cutter base 3. Further, an engaging hole 341 is provided near the edge of the central portion of the control plate 34.

Steps 342 and 343 are provided on the non-fixed side of the control plate 34. The steps 342 and 343 are
When the engaging pin 36, which will be described later, is retracted to be removed from the engaging hole 341 and the movable cutter base 3 is rotated, when the angle of the movable cutter base 3 is 22.5 degrees from the horizontal, the engaging pin 36 Hits the step 342, and when it is 45 degrees, the step 343
It is set to hit.

The frame F is provided with pin bearings 35 corresponding to the engaging holes 341. An engagement pin 36, which is an engagement member that is operated to move in and out through the wire tube T, is provided at the tip of the pin bearing 35. The pin bearing 35 is attached at a position where the engagement pin 36 engages with the engagement hole 341 when the main cutter base 2 and the movable cutter base 3 are in a parallel state.

According to this, the movable cutter base 3 can swing downward from the state parallel to the main cutter base 2. That is, the engagement pin 36 and the stepped portions 342, 34 of the control plate 34.
By the action of 3, the movable cutter base 3 swings in the range of 60 degrees from the horizontal state, following the angle or unevenness of the grass cutting slope. In the drawings, the same or equivalent parts as those in the first embodiment are designated by the same reference numerals.

FIG. 10 is a perspective view showing another method of using the second embodiment of the mower according to the present invention. As shown in the figure, by removing the movable cutter base 3 and the transmission shaft 5 and attaching the cover 20a to the hinge 29, a two-wheeled mower C2a having one front wheel and one rear wheel is obtained. The mower C2a has a narrow width and is therefore suitable for mowing work in a narrow space. Moreover, since the mower C2a has a two-wheel structure of one wheel each at the front and rear, it has good straightness and is easy to drive. It should be noted that the present invention is not limited to the embodiment shown in the drawings, and the number of movable cutter bases may be two, and the movable cutter bases may be provided on both sides of the main cutter base. Deformation is possible.

[0042]

The present invention having the above-mentioned structure has the following effects. (1) The main guide wheel is provided in front of the main rotary blade, and the traveling device is arranged behind the main rotary blade. The auxiliary guide wheel is provided in front of the auxiliary rotary blade.
Therefore, both the main guide wheels and the sub guide wheels can have a longer wheel base between them and the traveling wheels, so that straight running stability can be secured when traveling. For this reason, grass cutting work can be performed while ensuring straight-line stability even on a ridge road that is narrow in width and has many irregularities, and in many cases the upper surface is convex and both sides are inclined toward the paddy field. (2) In addition, foreign matter such as concrete piles and stones for the boundary of the ridge that are hidden by the grass and are hard to see hit the main guide wheel and the sub guide wheel before hitting the rotary blade, so it is possible to detect the existence in advance. It is possible to take an appropriate avoidance measure. (3) Furthermore, even if the mowing machine is in a state where it leans forward during mowing work, the main guide wheels and the auxiliary guide wheels support the mowing machine, so that forward leaning can be prevented and mud and foreign matter can be bitten. It is possible to prevent the pain of the rotary blade caused by.

[Brief description of drawings]

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

FIG. 2 is an explanatory view of a main part of means for driving a rotary blade.

FIG. 3 is a perspective view of an angle adjusting device for the main cutter base and the movable cutter base.

FIG. 4 shows a relationship between a main cutter base having a main rotary blade, a movable cutter base having a sub rotary blade, and a transmission shaft that links the main rotary blade and the sub rotary blade, and a part of which is cut away. FIG.

FIG. 5 is an explanatory diagram of a case where one rotary blade is used while being inclined downward.

FIG. 6 is an explanatory view when one of the rotary blades is used while being inclined upward.

FIG. 7 is an explanatory view when using traveling wheels having different diameters.

FIG. 8 is a perspective view showing a second embodiment of the mower according to the present invention.

FIG. 9 is a perspective view of an angle adjusting device for the main cutter base and the movable cutter base.

FIG. 10 is a perspective view showing another usage of the second embodiment of the mower according to the present invention.

[Explanation of symbols]

 C1 Mower 1 Self-propelled base 10 Traveling wheel 2 Main cutter base 3 Movable cutter base 4, 4a Rotating blade 5 Transmission shaft E Motor prime mover C2 Mower 6 Cutting height adjustment lever 60 Cutting height adjustment board 32 Adjustment plate 24 Engagement pin 34 Control plate 36 Engagement pin

Claims (1)

[Claims] 1. A main cutter base (2) having a main rotary blade (43) arranged in front of a traveling wheel (10) and fixed to a rotary shaft (42) to rotate horizontally or substantially horizontally, With respect to the main cutter base (2), a sub rotary blade (43a) fixed to the rotary shaft (42a) and rotatable on a surface intersecting the plane of the main rotary blade (43) in the direction of rotation is provided. A movable cutter base (3) mounted so as to be vertically swingable, and the main cutter base (2) and the movable cutter base (3) are arranged side by side in a front view. A walk-behind ridge mower, in which the main guide wheel is provided in front of the main rotary blade (43).
A walking type ridge mower, comprising (21) and a sub guide wheel (31) provided in front of the sub rotary blade (43a).