JPH0654619A - Mower - Google Patents

Abstract

PURPOSE:To obtain a mower capable of sufficiently dealing with ridges of a shape of horse back, being handled with a reduced burden of an operator. CONSTITUTION:A bush cutting blade 13 is held on a body frame 2 equipped with front and rear wheels 3 and 4 and a maneuvering handle 5 in such a way that the bush cutting blade can be rocked around the axis of traveling direction. The front and rear wheels and the maneuvering handle are made almost vertical and burden of an operator is reduced. When the front and the rear wheels have each one wheel, the mower can be traveled on a slope in an approximately vertical attitude of the wheels.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing machine suitable for mowing field ridges.

[0002]

2. Description of the Related Art Weeds on ridges are prone to pest nests, and therefore need to be mowed several times a year such as first mowing, second mowing, and so on. Since this work is hard labor,
Various machines have been proposed and put into practical use under the names of mowers and reapers.

For example, in the reaper of Japanese Utility Model Publication No. 61-40099, the machine body is supported by front and rear four wheels, and the machine body has an engine,
It is equipped with a cutting blade and cuts grass while running on its own. As shown in FIG. 3 of the publication, when cutting the slope of a ridge, the whole is inclined. When the width of this slope is narrow, the feature is that the distance between the left and right wheels can be narrowed.

[0004]

FIG. 8 is an ideal sectional view of a ridge, and FIG. 9 is an actual sectional view of a ridge. Ridge 100 in FIG.
Is an isosceles trapezoid consisting of an upper surface 101 and slopes 102, 102, and a four-wheel mower 103 shown by P has its cutting blade 104.
It is possible to mow the grass on the slope 102 with. Also, the reaper 103 shown by the imaginary line Q can also cut grass if the handle 105 is firmly held.

However, in practice, most of the ridges 110 are horse-back-shaped ridges with rounded corners as shown in FIG. In such a ridge 110, since there are few portions for stopping the sideslip of the wheels, even if the steering wheel is strongly held, it is easy to fall as shown by the arrow. The engine 106 is provided above the cutting blade 104.
The center of gravity becomes high due to the arrangement of such things, and the possibility of the above-mentioned fall is high and the burden on the farmer is extremely heavy.

[0006] Therefore, an object of the present invention is to provide a mowing machine which can sufficiently cope with a horseshoe-shaped ridge and has a small burden on an operator.

[0007]

In order to achieve the above object, the present invention is characterized in that a cutting blade is suspended on a vehicle body frame having front and rear wheels and an operation handle so as to be swingable around an axis in the traveling direction. .

An engine for rotating the cutting blade and driving the drive wheels and a cutter housing for surrounding the cutting blade are attached to the body frame. The center of gravity of the engine may be arranged on one side of the swing shaft of the vehicle body frame, and the center of gravity of the cutter housing including the cutting blade may be arranged on the other side of the swing shaft. This allows the rear wheels to be placed below the engine.

It is desirable that the front and rear wheels are two wheels each having one wheel.

It is preferable that the swinging portion including the cutting blade is attached to the body frame in an eccentric state, and the guide member is attached to the tilted swinging portion.

[0011]

[Function] Although the front and rear wheels and the operation handle are almost vertical, the cutting blade tilts in a state of following the slope.

The engine and the cutter housing are arranged on both sides of the body frame to facilitate balance.

If the front and rear wheels are each one, the front and rear wheels can run on the slope in a substantially vertical posture.

The swinging portion including the cutting blade is attached in an eccentric state,
By attaching the guide member to the inclined swinging portion, the swinging portion is held by the front and rear wheels and the guide member, and stable traveling can be achieved.

By storing the rear wheel under the engine, the length of the mower is shortened.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of the reference numerals.
FIG. 1 is a side sectional view of a mower according to a first embodiment of the present invention. The mower 1 includes a non-oscillating portion A and an oscillating portion B.

The non-oscillating portion A is a V-shaped vehicle body frame 2 curved in the longitudinal direction, front wheels 3 and rear wheels 4 attached to the front and rear of the vehicle body frame 2, and the vehicle body frame 2.
It is composed of an operation handle 5 extending obliquely rearward and upward and a rear wheel gear case unit 6, and is integrally connected to the operation handle 5.

The swinging portion B is the engine mount pipe 1
0, a vertical crankshaft engine 11 mounted on the pipe 10, a cutter housing 12 bolted to the lower surface of the pipe 10, a cutting blade 13 housed in the cutter housing 12, and a crank for the cutting blade 13. Transmission parts for transmitting power from the shaft 14 (small pulley 15, belt 16, large pulley 17), a guide member 18 attached to one side (see FIG. 2) of the cutter housing 12, and a front and rear of the swinging portion B. It comprises a front pivot shaft 20 and a rear pivot shaft 21 which are projected, and the swinging portion B is suspended by the front and rear pivot shafts 20 and 21 on the body frame 2 of the non-swinging portion A as shown in the figure. Characterize. The guide member 18 is a member that maintains the height of the swinging portion B from the ground, and is preferably an auxiliary wheel or a sled.

In the figure, 22 is the power take-off shaft 2 of the engine 11.
A universal joint for transmitting the power of 3 to the rear wheel gear case unit 6, and 24 for the engine mount pipe 10.
A channel fixed to the rear portion, 25 is a starter grip of the engine, and 26 is a front wheel cover.

The non-oscillating portion A is named for comparison with the oscillating portion B, and it goes without saying that if the operating handle 5 is tilted to the left or right when viewed from the operator, it will fall in the same direction. .

FIG. 2 is a schematic plan view of the mower according to the first embodiment of the present invention, and is a plan view of a part of the components of FIG. 1 for the sake of simplicity of description. The mower 1 of this embodiment is a so-called front and rear two-wheeled vehicle, and the front wheel 3 is composed of narrow tires and the rear wheel 4 is composed of wide tires.

With respect to the C axis passing through the front wheel 3, the front and rear pivot shafts 20 and 21, and the rear wheel 4 (corresponding to the longitudinal axis of the non-oscillating portion A), passing through the respective centers of the crankshaft 14 and the cutting blade 13
It is characterized in that the axis (corresponding to the longitudinal axis passing through the center of gravity of the swinging portion B) is eccentric by d. As a result, the E side in the drawing is lowered (from the front to the back), so the guide member 18 is provided.

The operation of the mower having the above structure will be described below. In FIG. 1, the starter grip 25 is pulled to start the engine, and the cutting blade on / off lever 28 provided near the grip 27 of the operation handle 5 is tilted to “on” to rotate the cutting blade 13 and also the cutting blade. The rear wheel 4 is rotated by switching the back or front running lever 29 of the on / off lever 28 from "stop" to "run" to start self-propelling.

It is necessary to hold the operation handle 5 with a certain amount of force during self-propelling. The swinging portion B is supported by the front wheel 3, the rear wheel 4 and the guide member 18, so there is no problem, but the non-swinging portion A is supported by the front and rear two wheels 3 and 4, so it is necessary to support it manually. Because there is. However, since only the non-oscillating portion A is supported, the burden is small.

FIG. 3 is an operation diagram when cutting the upper surface of the ridge,
The rear wheel 4 and the operation handle 5 are substantially vertical, and the cutter housing 12 and the cutting blade 13 are in a substantially horizontal state for mowing work.

FIG. 4 is an operation diagram when cutting the corners of the ridge. The rear wheel 4 and the operating handle 5 remain substantially vertical, but the cutter housing 12 rotates about the pivot shafts 20 and 21. The cutting blade 13 inclines to the left and cuts grass.

FIG. 5 is an action diagram when mowing the slope of the ridge,
The rear wheel 4 and the operating handle 5 remain almost vertical,
The cutter housing 12 rotates about the pivot shafts 20 and 21, and as a result, the cutting blade 13 can cut grass in a state of following the slope. When it arrives at the tip of the ridge in the state shown in Fig. 5, it may be turned there by 180 ° and work on the other slope.

3 to 5, the front and rear wheels 3 and 4 are characterized by being held substantially vertically. Since the worker tries to stand vertically on the slope, it is easy for such a worker to keep the operation handle 5 substantially vertical. Further, even on a slope, the front and rear wheels 3 and 4 bite slightly into the ground so that the vehicle can travel without skidding.

In this embodiment, the rear wheel 4 has a wide width.
Although it is a ring, it may be two wheels with a narrow width. A three-wheeled vehicle with two rear wheels has stable running on flat ground and easier turns than a two-wheeled vehicle.

FIG. 6 is a plan view of a mower according to a second embodiment of the present invention. Most of the reference numerals used in the first embodiment are used, but the rocking motion of the pivot shafts 20 and 21 connected to each other is shown. It is characterized in that the center of the engine 11 is arranged on the right side and the center of the cutter housing 12 is arranged on the left side with respect to the moving axis E as seen from the operator.

Most of the cutter housing 12 has a swing axis E.
As a result, the grass intake port 12a, grass discharge port 1
Both 2b are located on one side of the swing axis E (left as seen from the operator). For example, by arranging the front wheel 3 along the right end of the grass band to be mowed, grass having the width of the grass intake 12a can be easily taken in, and the positioning of the mower is easy.

Referring to FIG. 6 in detail, the center of gravity G1 of the engine 11 is separated from the swing axis E by L1, and the center of gravity G2 of the cutter housing 12 including the cutting blade 13 is separated from the swing axis E by L2. The moment (load on G1 x L1) is more than the moment (load on G2 x L2)
Is slightly larger. This is because the auxiliary wheel 18 attached to the cutter housing 12 is always grounded. On the other hand, since the left and right are balanced, operation is easy,
In particular, it can be said that the burden on the operator when traveling on a flat surface will be light.

FIG. 7 is a side view of FIG. 6, and is characterized in that the rear wheel 4 is significantly closer to the front wheel 3 side than in FIG. This is because at least the front half portion of the rear wheel 4 is housed below the engine 11 because the cutter housing 12 is largely moved to the front side of the drawing so as not to interfere with the rear wheel 4 and the engine 11 is raised. Therefore, the operator can approach the mowing machine 1, and thus the length of the mowing machine 1 can be shortened, and handling such as direction change becomes easy.

[0034]

As described above, according to the present invention, since the cutting blade is suspended on the vehicle body frame having the front and rear wheels and the operation handle so as to be swingable about the traveling direction axis, the front and rear wheels and the operation handle are substantially vertical. Therefore, the burden on the operator is reduced.

If the center of gravity of the engine is arranged on one side of the swing shaft of the body frame and the center of gravity of the cutter housing including the cutting blade is arranged on the other side of the swing shaft in a substantially left-right balance, the operation is easy. Therefore, the burden on the operator is reduced especially when traveling on a flat surface.

If each of the front and rear wheels is one wheel, the wheels can be easily run on the slope in a substantially vertical posture, so that the burden on the operator is reduced.

By attaching the swinging portion including the cutting blade in an eccentric state and attaching the guide member to the tilted swinging portion,
The rocking portion is held by the front and rear wheels and the guide member, and stable traveling can be achieved.

Further, by storing the rear wheel under the engine, the length of the mower can be shortened.

[Brief description of drawings]

FIG. 1 is a side sectional view of a mower according to a first embodiment of the present invention.

FIG. 2 is a schematic plan view of the mower according to the first embodiment of the present invention.

FIG. 3 is an operation diagram when cutting the upper surface of a ridge according to the present invention.

FIG. 4 is an action diagram when mowing the ridges of the present invention.

FIG. 5 is an operation diagram when mowing the slope of the ridge according to the present invention.

FIG. 6 is a plan view of a mower according to a second embodiment of the present invention.

FIG. 7 is a side view of a mower according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view of a conventional ideal ridge.

FIG. 9 is a sectional view of a conventional actual ridge.

[Explanation of symbols]

1 ... Mower, 2 ... Body frame, 3 ... Front wheel, 4 ... Rear wheel,
5 ... Operation handle, 11 ... Engine, 12 ... Cutter housing, 13 ... Cutting blade, 18 ... Guide member, 20, 21 ...
Pivot shaft, A ... Non-oscillating part, B ... Oscillating part, E ... Oscillating shaft.

Claims (5)

[Claims] 1. A mower comprising a vehicle body frame provided with front and rear wheels and an operation handle, and a cutting blade suspended on the vehicle body frame so as to be swingable around an axis in the traveling direction. 2. An engine for rotating a cutting blade and driving a drive wheel and a cutter housing surrounding the cutting blade are attached to the vehicle body frame, and the center of gravity of the engine is on one side of a swing shaft of the vehicle body frame. The mower according to claim 1, wherein the center of gravity of the cutter housing including the cutting blade is arranged on the other side of the swing shaft. 3. A mower according to claim 1, wherein the front and rear wheels are two-wheeled vehicles each having one wheel. 4. A swing member including a cutting blade is attached to the body frame in an eccentric state, and a guide member for keeping a height from the ground is attached to the tilted swing portion. The mower according to claim 1 or claim 2. 5. The mower according to claim 2, wherein at least a front half portion of a rear wheel is arranged below the engine.