JPS6034545Y2 - elevated tractor - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of an elevated tractor that can move over tall crops such as tobacco planted in a field.

2. Description of the Related Art So-called elevated tractors have been known in the past, which can travel over crops planted in a field and perform various operations on the crops (for example, harvesting, spraying chemicals, etc.).

This elevated tractor needs to be higher than the height above the ground when the target crop is tall tobacco depletion, etc., and in order to run it stably, the length and width of the elevated tractor must be adjusted. I have no choice but to make it bigger.

For this reason, when using an elevated tractor, a large headland is required for turning at the edge of a ridge, and there are drawbacks such as the need for skill in operating the tractor.

Furthermore, there was a risk of falling when driving in the direction of the contour line on a slope.

The object of the present invention is to provide an elevated tractor that does not have these drawbacks.

An embodiment of the present invention will be described with reference to the drawings.
a and an upper frame 1b that firmly connects the top of the hydraulic piston cylinder 1a.

The upper parts of the pair of left and right frames 1 are connected by a horizontal frame IC fixed to the upper frame 1b, and the lower parts of the pair of left and right frames 1 are connected via a mounting plate 3a at the bottom of the hydraulic piston cylinder 1a. and is fixed to the frame 3.

The wheels 5 are attached to the lower part of the frame body 3 via the attachment plate 3b and the wheel attachment frame 4, resulting in a four-wheel structure.
are rotatably driven by hydraulic motors 6 provided respectively so as to be able to move forward and backward.

A shaft (not shown) is fixed to the upper surface of the wheel mounting frame 4, and is attached to the mounting plate 3 via a bearing (not shown) provided on the mounting plate 3b.
The wheel 5 is connected to a hydraulic swing motor 7 provided on the wheel b, and the hydraulic swing motor 7 enables the wheel 5 to swing left and right at least 90 degrees in the running direction.

The supply of high-pressure oil that serves as the driving force for the hydraulic piston cylinder la, the hydraulic motor 6, and the hydraulic swing motor 7 described above is performed by a hydraulic supply device 8 installed on the frame 3.

The hydraulic supply device 8 includes an engine 8a, a hydraulic pump 8b, and an oil tank 8C.

The expansion and contraction of the hydraulic piston cylinder 1a, the adjustment of the rotational direction and speed of the hydraulic motor 6, and the operation of the hydraulic swing motor 7 are performed by a hydraulic control device 9 installed on the frame 3.

The hydraulic piston cylinder 1a, the hydraulic motor 6, the hydraulic swing motor 7, the hydraulic supply device 8, and the hydraulic control device 9 are connected by a conduit (not shown), and the operator on the driver's seat 2 can control the tractor body A. A travel steering operation and an expansion/contraction operation of the hydraulic piston cylinder 1a constituting the frame 1 are performed.

Reference numeral 9a is a bundle that controls the hydraulic swing motor, and the running direction of the wheels 5 is changed by operating this bundle 9a.

Reference numeral 9b is a lever for controlling the rotational direction and speed of the hydraulic motor 6, and thereby the rotational direction and speed of the wheel 5 can be controlled.

By tilting the lever 9b forward, the wheel 5 can be rotated in the forward direction, and by tilting it backward, the wheel 5 can be rotated in the reverse direction.

Further, if the lever 9b is tilted at a small angle both forward and backward, the rotational speed of the wheel 5 will be small; if it is tilted, the rotational speed will be high, and when the lever 9b is set upright, the wheel will be in a neutral state and the wheel will not rotate.

9c is a hydraulic piston cylinder 1a constituting the right side frame 1
9d is a lever that operates the expansion and contraction of the left side.

When levers 9c and 9d are both pushed forward, the respective hydraulic piston cylinders 1a are shortened, and when pushed back, they are extended.

Furthermore, when the levers 9C and 9d are in the upright state, they are in neutral, and the expansion and contraction of the respective hydraulic piston cylinders 1a are stopped.

Reference numeral 11 denotes a column, the upper end of which is detachably attached to the upper frame 1b, and various working devices are attached to it as necessary.

The features of the operation of the elevated tractor of the present invention having the configuration described above are as follows.

Push the lever 9b of the elevated tractor that is correctly placed in line with the furrow forward, and move the elevated tractor forward.
Do the work.

When the elevated tractor reaches the edge of the ridge, the lever 9b is turned upright to temporarily stop the tractor from moving (see FIG. 2).

Next, the bundle 9a is steered to fix the traveling direction of the wheels 5 to the left or right by 90 degrees by the swing motor 7,
Tilt the lever 9b forward or backward, drive in the right angle direction to the ridge or appropriate position for the next work, and then press the lever 9b again.
(b) in neutral, stop the elevated tractor from traveling, steer the bundle 9a again, and set the traveling direction of the wheels 5 back at 90 degrees (see Fig. 3).1. This time, by tilting the lever 9b backwards, the elevated tractor can travel backwards, enter the furrow, or almost enter the field, and continue the work.

As explained above, when changing ridges, the elevated tractor of the present invention turns in a semicircle like a conventional tractor, then retreats and advances to an appropriate position to travel between ridges. There is no need to make it possible to do so; it is sufficient to simply operate the bundle 9a to change the direction of the wheels 5 by 90 degrees and make the tractor main body A travel in a right-angled direction.

Therefore, since the tractor of the present invention requires less headland,
It has the advantage of being able to be used on a small scale, and also improves work efficiency as it allows work to be done by moving to the next ridge without turning.

Second, the elevated tractor of the present invention is suitable for use on slopes.
As shown in the figure, by operating the levers 9c and 9d, the hydraulic piston cylinder 1a on the upper side of the inclination is retracted and the hydraulic piston cylinder 1a on the lower side of the inclination is extended, depending on the degree of inclination. The pair of left and right frames 1 can be held in a vertical state without being tilted.

Therefore, when traveling in the contour line direction, the tractor main body A has the characteristic of being able to travel straight without the risk of falling over.

Furthermore, when the tractor of this invention enters a sloped area,
Similar to the above-mentioned ridge changing work at the ridge end of the tractor of the present invention, just before entering the site on a slope, as shown in FIG.゜Standing still, the slope runs towards the field, and when it reaches the slope, the hydraulic piston cylinder 1a on the upper side of the slope is retracted by operating the levers 9c and 9d according to the degree of slope, and the hydraulic piston cylinder 1a on the lower side of the slope is retracted. After reaching the work position by running uphill on the slope, the bundle 9a is used to turn the wheels 5 at 90° again and run in the direction of the contour line.

The sloped land has the characteristic that changing the ridges on the field can be done extremely efficiently by operating the bundle 9a in the same manner as described above.

In addition, in the embodiment described here, the tractor body A
The pair of left and right frames 1 of the left and right sides are each composed of hydraulic piston cylinders 1a, but the present invention is not limited to this, and by constructing one of the frames 1 with hydraulic piston cylinders 1a, it is possible to create an elevated elevated structure suitable for slopes. It will be easy to see what a shaped tractor can achieve.

Next, with reference to FIGS. 5 to 7, the state in which the elevated tractor of the present invention is attached and used with various working machines will be explained.

First, we will explain about Fig. 5, which shows the working state of the tobacco leaf picking device installed in tobacco cultivation.When starting the work, the hydraulic piston cylinder 1a is expanded and contracted so that it straddles the stem and leaves of the tobacco leaf, and the desired The tobacco leaf harvesting device 10 of Japanese Patent Application No. 13937/1988 is attached via the support 11 to an appropriate position where the tobacco leaves of different heights can be picked and harvested, and the tractor main body A is driven. Then, the leaf picking device 10 works from the left and right sides of the tobacco trunk to pick the tobacco leaves from the trunk, and the picked tobacco leaves are received in a storage tank 17 that is removably installed on the frame 3. Since the tobacco is transported off-site, the harvesting process can be carried out extremely efficiently and with high precision.

Next, we will explain about FIG. 6, which shows the working condition in which the core fixing device is installed in tobacco cultivation.The core fixing device 1
Reference numeral 2 includes a disc knife 12a, a motor 12b for driving the disc knife 12a, and a battery 12c as a power source for the motor 12b.

This centering device 12 is connected to the support 11 and the upper connecting frame 1-c.
The disc knife 12a is attached to an appropriate space approximately in the center of the pair of left and right frames 1 of the tractor main body A through
After determining the height of action on the tobacco wick, the tractor body A is driven.

The tobacco core cut by the disk knife 12a is stored in the storage tank 1.
At 7, the box is taken and the cigarettes are taken out of the venue.

In this way, if the core fixing device 12 is attached to the elevated tractor of the present invention and the work is carried out, the operating height of the core fixing device 12 can be adjusted appropriately by expanding and contracting the hydraulic piston cylinder 1a, so that the core can be set according to the height of the cigarette. Stopping work can be done accurately and efficiently.

Next, referring to FIG. 7 which shows the working state in which the spraying device for pesticides etc. is attached, the spraying device 13 is installed at the spraying port 13a1.
It is composed of a pump engine device 13b and a liquid tank 13c loaded on the frame 3.

The pump engine device 13b of this spraying device 13 is connected to the support 1
1 to the tractor body A, and the spraying port 13a is placed and attached to an appropriate space inside and outside the pair of left and right frames 1 of the tractor body A via the support 11, and the hydraulic piston cylinder 1a is installed according to the height of the crop. By extending and retracting the tractor body A, it is possible to accurately and efficiently spray chemical solutions, liquid fertilizers, etc. to desired locations on crops.

As explained above, the elevated tractor of the present invention can be attached with various types of work equipment and perform various tasks, and can perform these tasks accurately and efficiently.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an embodiment of the present invention, Figures 2 and 3 are
The figure is a plan view of Fig. 1, Fig. 4 is a front view showing the working condition on the slope shown in Fig. 1, Fig. 5 is a front view showing the working condition with the tobacco leaf picking device attached to Fig. 1, FIG. 6 is a front view showing a working state in which the core fixing device is attached to FIG. 1, and FIG. 7 is a front view showing a working state in which the spreading device is attached to FIG. 1. 1 is a pair of left and right frames, 4 is a wheel mounting frame, 5 is a wheel, 1c
is a horizontal frame, 6 is a hydraulic motor, 7 is a hydraulic swing motor, 8
9 is a hydraulic pressure supply device, and 9 is a hydraulic control device.

Claims (1)

[Scope of utility model registration request] At least one of the left and right pairs has wheels attached to the front and rear lower portions of the height-adjustable frame body through wheel attachment frames, respectively, and the left and right frames are connected by a horizontal frame body to correspond to each wheel attachment frame. A hydraulic swing motor and a hydraulic motor corresponding to each wheel are provided, and these are driven to rotate in forward and reverse directions by a hydraulic supply device and a hydraulic control device, and
An elevated tractor characterized in that the height of the frame is adjusted by the hydraulic system.