JPS6365552B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mobile agricultural machine represented by a ridge coating machine, a middle tillage management machine, etc. The present invention relates to a walking type one-wheeled mobile agricultural machine equipped with an operating handle having a grip portion.

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

In other words, for mobile agricultural machinery, ○B. Install the heavy power unit 3 as low as possible in order to lower the machine's center of gravity and increase the stability of the machine; ○B. Improve the left-right balance of the machine body. In order to achieve this, the ground contact part 1a of the running wheel 1 should be located within the width of the power unit 3, which is a heavy object, that is, directly below or near the center of gravity of the machine. It is required to be able to freely select and install a range of running wheels, from small-sized running wheels to large-diameter running wheels with excellent wet paddy performance. 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. , the position of the prime mover 3 becomes unreasonably high,
Alternatively, as shown in FIG. 8, the ground contact portion 1a of the running wheel 1 is largely displaced in the lateral direction with respect to the prime mover 3, making it impossible to satisfy the above three requirements at the same time.

Therefore, as a means to satisfy the above three requirements at the same time, as shown in FIG. 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 walk-behind single-wheeled mobile agricultural machine according to the present invention, the driving device is arranged along a vertical plane, and a transmission case is extended straight downward from the side of the driving device along the vertical plane. A horizontal output shaft with an axis aligned in the horizontal direction is provided in the lower part of the housing case, and the axle of the wheel is connected to the horizontal output shaft in an inclined position via a universal joint, so that the traveling wheel is characterized in that the ground-contacting portion thereof is arranged in an inclined position relative to the ground, with the ground-contacting portion thereof being located within the width of the prime mover.

Therefore, according to this characteristic configuration, by arranging the running wheels in the above-mentioned tilted attitude relative to the ground, the ground contact portions of the running wheels are located within the width of the prime mover, and the drive wheels can be positioned within the width of the prime mover. Although it is arranged as low as possible, even if the radius of the running wheel is larger than the distance between the axle and the prime mover, the upper side that directly faces the ground contact part of the large diameter running wheel. The part can be positioned outside the width of the prime mover and can be mounted without coming into contact with the prime mover. Moreover, when tilting the wheels, the powertrain and transmission case are in a vertical position and the axles are tilted, so as shown in Figure 5, the powertrain and transmission case are tilted and the wheels are tilted. This prevents the engine piston from wearing out on one side and causing early damage to the engine, as in the case of
When the prime mover is in a vertical position and the transmission case with wheels is tilted relative to the prime mover so that the ground contact part of the wheels is located within the width of the prime mover, the power of the engine is transferred to the transmission. There is no need for a special transmission structure using a worm to transmit the signal to the transmission mechanism inside the case, and there is an advantage that the transmission structure from the engine to the transmission 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 has a frame 4 mounted with a driving device 3 protruding forward from the upper part of a transmission case 2 in an up-and-down position supporting a running wheel 1 in a cantilevered manner.
In addition, an operation handle 6 having a pair of left and right grips 6a and 6a' is attached to the traveling body 5, which is fixedly connected to the drive unit 3 so as to be displaced laterally to the transmission case 2. A device 7 for raking field mud to one side is disposed behind the traveling wheels 1 in a fixed manner, and the raking device 7
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. There is.

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. A link 7 that is connected and swings freely around the front and rear axis _a2 at one end side.
The L-shaped member 7C is pivotally connected to the L-shaped member 7C, and the other end is rotated laterally as the crank arm 7A rotates. .

The molding device 8 is attached to a second frame 11 connected to the mission case 2 in a rearwardly protruding state, and is attached to the second frame 11 so that its position can be changed and fixed in the lateral direction. A horizontal frame 8A, a vertical frame member 8A' attached to the horizontal frame 8A so as to be swingable and fixed around the longitudinal axis _a3 , a molded plate 8B fixedly attached to this, 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 swinging (swinging) around it, and a mechanism 8D that swings this pounding plate 8C in conjunction with the operation of the raking device 7. be. An intermediate portion of the second frame 11 corresponding to the raking device 7 is configured to protrude upward to allow the raking device 7 to operate. The swing mechanism 8D
A cam 8a fixed to the shaft 7a of the crank arm 7A, a first link 8b that swings around the longitudinal axis _a5 as the cam 8a rotates, and a first rod 8c attached to the first link 8b. The second
a link 8d, a third link 8e that is axially interlocked with the second link 8d, and a second link that links the free end of the third link 8e with the upper end of the beating plate 8C.
It is equipped with a rod 8f. Said second rod 8f
When the third link 8e swings the knocking plate 8C away from the ridge, the third link 8C contacts and interlocks with the nut 8g via the nut 8g, and when the third link 8e swings in the opposite direction, It is linked to 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.

When the transmission case 2 is in a vertical position when viewed from the front, the operating handle 6 is mounted on the traveling body 5, and the left and right grips 6a and 6a' thereof are located in the same horizontal plane. When the running wheel 1 is fixed in a posture in which the left and right grip portions 6a, 6a' are located in the same horizontal plane, the ground contact portion 1a is attached to the drive unit 3.
The operating handle 6 is placed in an inclined position relative to the ground within the width of the steering wheel 6, and the left and right grip portions 6a, 6a' of the steering handle 6 are in an equal positional relationship with respect to the ground contact portion 1a of the running wheel 1. That is, it is connected to the traveling body 5 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 present invention may be implemented as follows.

Applicable to mobile agricultural machinery other than ridge coating machines, such as inter-tillage management machines.

As the running wheels 1, a grass cutting cage wheel, a tilling claw rotor, a ridge cutting rotor, etc. are installed.

[Brief explanation of drawings]

Fig. 1 is a side view, Fig. 2 is a plan view, Fig. 3 is a partially cutaway front view of the main part, Fig. 4 is an enlarged rear view of the main part, and Fig. 5 is a front view showing a comparative example. FIGS. 6 to 8 are front views showing conventional devices. 1... Traveling wheel, 2... Mission case, 2
a...Axle, 2b...Horizontal output shaft, 2c...Universal joint, 3...Motive power unit, 5...Traveling body, 6a,
6a'...Grip part, 6...Control handle.

Claims (1)

[Claims] 1 A driving device 3, a transmission case 2 that supports the running wheel 1 in a cantilevered manner, and a pair of left and right grips 6
In the walk-behind single-wheeled mobile agricultural machine equipped with a steering handle 6 having steering handles 6a and 6a', the driving device 3 is arranged along a vertical plane, and the driving device 3 is arranged along the vertical plane from a side surface of the driving device 3. A transmission case 2 is extended straight downward, and a horizontal output shaft 2b whose shaft center is aligned in the horizontal direction is provided at the bottom of the transmission case 2, and the axle 2a of the wheel 1 is connected to the horizontal output shaft 2b. The driving wheel 1 is arranged in an inclined position and connected via a universal joint 2c, so that the running wheel 1 is arranged in an inclined position with respect to the ground such that its ground contact portion 1a is located within the width of the prime mover 3. A walking single-wheeled mobile agricultural machine.