JPH0120109B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile agricultural machine represented by a ridge coating machine, a mid-till management machine, etc. This invention relates to a walking type one-wheeled mobile agricultural machine in which a driving handle having a pair of right and left grips is fixedly connected to a running machine body.

Since such a walk-behind single-wheeled mobile agricultural machine has one running wheel, the machine body does not tilt from side to side due to irregularities on the running surface, for example, unlike mobile agricultural machines equipped with a pair of left and right running wheels, and it is easy to run straight. Although there is an advantage, as in the conventional example illustrated in FIGS. 8 to 10, when the running wheel 1 is placed in a posture in which the left and right grip portions 6a, 6a' of the handle 6 are located in the same or substantially the same horizontal plane, When disposed in a vertical position when viewed from the front, the following inconvenience occurs.

In other words, in mobile agricultural machinery, ○B. To lower the center of gravity of the machine and increase the stability of the machine, the heavy power unit 3 should be installed as low as possible. ○B. To improve the left-right balance of the machine. In addition, the ground contact part 1a of the running wheel 1 should be located below or near the center of gravity of the machine. ○C In order to achieve general versatility, we have changed from a small diameter running wheel for dry fields to a large diameter running wheel that has excellent wet field performance. It is required to be able to freely select and install up to However, in a conventional mobile agricultural machine, if the configuration satisfies the requirements of ○A and ○B, as shown in FIG. In order to avoid contact with the prime mover 3 of No. 1, it becomes impossible to install large-diameter running wheels with excellent wet field performance, and if the configuration satisfies the requirement of ○C above, as shown in FIG. 9, If the position of the prime mover 3 becomes unduly high, or as shown in FIG. It was not possible to satisfy both demands at the same time.

Therefore, as a means to satisfy the above three requirements at the same time, as shown in FIG. 11, the entire traveling body 5 is tilted left and right in a posture in which the left and right grips 6a and 6a' of the handle 6 are located in the same horizontal plane. However, in such a case, due to the inclination of the engine 3A as a driving device, only one side of the piston will wear out, causing the engine to deteriorate quickly.

In view of this, an object of the present invention is to simultaneously satisfy the three requirements ○A, ○B, and ○C without premature damage to the engine.

In the walking type single-wheeled mobile agricultural machine according to the present invention, the transmission case is arranged along a vertical plane, the driving device is connected to the upper part of the transmission case along the vertical plane, and the transmission case is arranged along the vertical plane. The operating handle is fixedly connected to a traveling aircraft body having a power unit connected to the upper part of the case, with the left and right grips thereof being located at equal distances from each other and on the same horizontal plane, At the bottom of the mission case,
A horizontal output shaft with the axis aligned in the horizontal direction is provided, and the wheels are tilted with respect to this horizontal output shaft.
Further, the vehicle is characterized in that the traveling wheels are connected via a universal joint and are arranged in an inclined position relative to the ground, with the ground contact portion thereof being located below the steering handle attachment portion.

According to this characteristic configuration, by arranging the running wheels in an inclined position relative to the ground as described above, the ground contact portion of the running wheels can be located within the width of the prime mover, and the prime mover can be positioned as much as possible. However, even if the radius of the running wheel is larger than the distance between the axle and the prime mover, the upper part of the large-diameter running wheel that is diametrically opposite to the ground contact area can be used as the prime mover. It can be positioned outside the width of the device and can be attached without coming into contact with the prime mover.

Moreover, since the wheels are arranged at an angle so that the ground contact part of the wheels is located below the handle attachment part, the left and right control balance of the aircraft is good. The moment is the same, so there is no difference between left and right forces when maneuvering.The wheels are arranged at an angle so that the ground contact area is below the handle attachment, so the left and right maneuvering balance of the aircraft is good. .

Furthermore, when tilting the wheels, since the prime mover and the transmission case are tilted with their axles in a vertical position, the prime mover and the transmission case, as shown in FIG.
This prevents the engine pistons from wearing out on one side and causing premature engine damage, as is the case when tilting the transmission case and tilting the wheels.
Also, for example, when the driving device is in a vertical position and the transmission case with wheels is tilted relative to the driving device so that the ground-contacting part of the wheel is located within the width of the driving device, the engine power is There is no need for a special transmission structure using a worm to transmit the power to the transmission mechanism in the transmission case, and there is an advantage that the transmission structure from the engine to the transmission case can be simplified.

Hereinafter, embodiments of the present invention will be described based on the illustrated ridge coating machine (an example of a walking single-wheeled mobile agricultural machine).

The ridge coating machine consists of a traveling machine body 5 in which a frame 4 on which a driving device 3 is mounted is fixedly connected to the upper part of a transmission case 2 in a vertical position supporting a traveling wheel 1 in a cantilevered manner so as to protrude forward. , a control handle 6 having a pair of left and right grips 6a, 6a' is fixedly connected, and a device 7 for raking field mud to one side is arranged behind the running wheels 1, and , a forming device 8 for applying and forming the mud raked by the raking device 7 onto the ridges, and a pair of left and right tail wheels 9, 9 for adjusting the working height are arranged behind the raking device 7. It is configured as follows.

The prime mover 3 includes an engine 3A, a fuel tank 3B, and the like.

The raking device 7 is arranged in the transmission case 2.
The first frame 10 is attached to the continuous first frame ₁₀ in a rearwardly protruding state, and as shown in FIG. and is pivotally connected at one end to a link 7B that is swingable around the longitudinal axis _a2 , and is cyclically operated in the lateral direction at the other end as the crank arm 7A rotates.
It is constructed by attaching a mulch plate 7D to the other end of the letter-shaped member 7C.

The molding device 8 is attached to a second frame 11 connected to the mission case 2 in a rearwardly protruding state. A vertical frame member 8 is attached to the frame 8A and the horizontal frame 8A so that it can swing and be fixed freely around the front and rear axis _a3 .
A', a molded plate 8B fixedly attached thereto, and
Front and rear axis a ₄ passing through the lower end of the vertical frame 8A'
It is equipped with a pounding plate 8C that presses the mud against the ridge side by vibrations around it, and a mechanism 8D that makes the pounding plate 8C swing in conjunction with the operation of the raking device 7. . An intermediate portion of the second frame 11 corresponding to the scraping device 7 is
It is configured to protrude upward to allow the operation of the raking device 7. The swing mechanism 8D includes a cam 8 fixed to the shaft 7a of the crank arm 7A.
a, a first link 8b that swings around the longitudinal axis _a5 as the cam 8a rotates;
b, a second link 8d linked via the first rod 8c, a third link 8e axially linked to the second link 8d, and a free end of the third link 8e and an upper end of the beating plate 8C. It is provided with a second rod 8f to be linked. The second rod 8f attaches a nut 8 to the third link 8e in response to swinging of the strike plate 8C of the third link 8e in a direction away from the ridge.
g, and for swinging in the opposite direction, the third link 8e is interlocked with the third link 8e via a spring 8h. In other words, when a hard mud lump or the like is supplied to the ridge side surface and a large reaction force acts on the beating plate 8C, the beating plate 8C is configured to elastically retreat.

The left and right tail wheels 9, 9 are connected to the second frame 1.
The support leg 9A is pivotably attached to the rear end of the support leg 1 so that the position can be changed and fixed.

In a state where the mission case 2 is positioned in a vertical position when viewed from the front, the operating handle 6 is attached to the traveling body 5 via the handle attachment part 6A, and the left and right grip parts 6a, 6 are attached to the traveling body 5.
a' are fixed in the same horizontal plane, and the running wheel 1 is held in place by the left and right grips 6.
a, 6a'' are located in the same horizontal plane, the ground contact portion 1a is arranged in an inclined position relative to the ground and located within the width of the prime mover 3, and the control handle 6 is held in its left and right grips. The portions 6a and 6a' are connected to the traveling body 5 in a state where they are in the same positional relationship with the ground contact portion 1a of the traveling wheel 1, that is, in a symmetrical state with respect to a vertical plane A along the front-rear direction including the ground contact portion 1a.

The means for arranging the traveling wheels 1 in an inclined position relative to the ground is provided by a wheel mounting axle 2a of the transmission case 2.
is provided in an inclined position in which the transmission case 2 is positioned downward toward the distal end when the transmission case 2 is in the above-mentioned vertical position, and the axle 2a is connected as a universal joint to the transmission shaft 2b as an output shaft located in a horizontal position. are interlocked via a universal joint 2c.

The walking single-wheeled mobile agricultural machine to which the present invention is applied is as follows:
In addition to the ridge coating machine shown in the embodiment, there is also a ridge cutting machine equipped with a ridge cutting rotor wheel as shown in FIG. Examples include a scraping agricultural machine, a tiller equipped with rotary tilling wheels as shown in FIG. 7, and a mobile agricultural machine whose wheels can be replaced.

[Brief explanation of drawings]

Figure 1 is a side view, Figure 2 is a plan view, Figure 3 is a partially cutaway front view of the main part, Figure 4 is an enlarged rear view of the main part, and Figures 5 to 7 are separate. FIG. 8 to FIG. 10 are front views showing conventional ones, respectively, and FIG. 11 is a front view showing a comparative example. 1... Traveling wheel, 2... Mission case, 3
...Motive power unit, 5...Traveling body, 6a, 6a'...
Grip portion, 6... steering handle, 2a... axle,
2b...Horizontal output shaft, 2c...Universal joint.

Claims (1)

[Claims] 1. A control handle 6 equipped with a pair of left and right grips 6a and 6a' is attached to a traveling body 5, which has a driving device 3 connected to the upper part of a transmission case 2 that supports the traveling wheels 1 in a cantilevered manner. In a walking type single-wheel mobile agricultural machine that is fixedly connected, the transmission case 2 is arranged along a vertical plane, and the driving device 3 is connected to the upper part of the transmission case 2 along the vertical plane. The operating handle 6 is mounted on the traveling aircraft 5, which has the power unit 3 connected to the upper part of the transmission case 2, with the left and right grips 6a and 6a' located at equal distances from each other, and A horizontal output shaft 2b is provided at the bottom of the transmission case 2, and the axle shaft 2a of the wheel 1 is connected to the horizontal output shaft 2b. in an inclined position, and the universal joint 2
A walking type one-wheeled mobile agricultural machine characterized in that the running wheel 1 is arranged in an inclined position relative to the ground with its ground contact portion 1a located below the steering handle attachment portion 6A. .