JPS6245535Y2 - - Google Patents

Description

[Detailed description of the invention] The invention consists of a front body on which left and right wheels are attached so that they can be raised and lowered in a reverse manner, and a rear body on which a seedling planting device equipped with a float is attached. The rear fuselage is coupled to the rear fuselage in a rolling manner, and a mechanism is provided to detect rolling of the rear fuselage with respect to a float provided on the rear fuselage, and based on the rolling detection result of this detection mechanism, the front fuselage is connected to the rear fuselage so as to be able to roll. The present invention relates to a wet field working machine equipped with a fluid pressure cylinder that raises and lowers each wheel of the machine body in a reverse manner.

This type of device raises and lowers the left and right wheels in a reverse manner when the level of the hard platen or the level of the planting mud surface fluctuates in the left-right direction. Accordingly, the level of the seedling planting device relative to the planting mud surface is suppressed from changing in the horizontal direction. It did not respond quickly to fluctuations, and level control could not be performed accurately or quickly.

In view of the above points, the present invention provides control for suppressing horizontal level fluctuations in the planting mud surface of the planting device caused by sudden fluctuations in the horizontal direction of the hard ground level or the level of the planting mud surface. The purpose is to be able to do this accurately and quickly.

Next, embodiments of the present invention will be described in detail based on the drawings.

An engine E is mounted on the front body of the car body, which has a pair of left and right wheels 1, 1 that can be raised and lowered, and floats 2... are suspended, and on the other hand, seedlings are supplied downward to the rear body while reciprocating in the lateral direction. A seedling platform 3 is installed at the rear of the seedling platform 3, and a seedling planting device 4 is installed at the rear of the platform to take out a predetermined amount of block seedlings from the seedling platform 3 and plant them in the field. The information is transmitted to the seedling planting device 4 via the planting mechanism 6, and the wet field working machine is configured to continuously plant seedlings in the rice field as it travels.

The transmission frame 7 in which the transmission engine 5 is housed is divided into two at a midway point in the longitudinal direction into the front fuselage side and the rear fuselage side, and the first frame 7a on the front fuselage side is The second frame 7b on the rear body side is rotatably connected to the second frame 7b around its longitudinal axis P, and the rear body is configured to be able to roll around the axis P relative to the front body.

Transmission cases 8, 8 on which the wheels 1, 1 are mounted
Each is pivotally connected to the front fuselage so as to be swingable around the horizontal axis X, and swing arms 9, 9 are integrally extended from the transmission cases 8, 8, respectively, and on the other hand, swing arms 9, 9 are provided on the first frame 7a. A support member 11 is externally fitted onto the guide shaft 10 so as to be slidable only in the longitudinal direction, and the support member 1
1 is provided with a support arm 12 rotatable around the vertical axis Y, both ends of the support arm 12 and the swing arms 9, 9 are interlocked and connected via rods 13, 13, and and the support member 11, and between the support member 11 and the support arm 12, first and second hydraulic cylinders 14 and 15, which are an example of a fluid pressure type, are interlocked and connected. The left and right wheels 1, 1 are raised and lowered integrally by the expansion and contraction of the cylinder 15, and the support arm 12 is rotated by the expansion and contraction of the second cylinder 15, so that the left and right wheels 1, 1 are raised and lowered in a reverse manner.

A float 2a on the front body side is pivotally connected to the front body so as to be swingable around a horizontal axis _P1 on the front end side thereof, and the rear end side of the float 2a is pressed and biased toward the ground side via a spring 16, and a rotary type first cylinder for the float 2a and the first cylinder 14.
Connect control valve V ₁ to rod 17 and swing arm 18
It is interlocked and connected via the float 2.
The first cylinder 14 is actuated based on the earth pressure with respect to a, and the left and right wheels 1, 1 are automatically moved up and down integrally.

The left and right floats 2, 2 on the rear fuselage side are attached to the horizontal frame 24.
The horizontal frame 24 is connected integrally through the second
The horizontal frame 24 and the second frame 7 are pivotally connected to the frame 7b so as to be swingable around an axis _P2 in the longitudinal direction of the fuselage.
A spring 25 with different biasing directions between
25 is attached, and the left and right floats 2, 2 are attached in a natural state.
Each is configured to maintain the same level with respect to the rear body, and based on the difference in earth pressure to the left and right floats 2, 2, the tilt in the left and right direction, that is, the tilt of the rear body with respect to the left and right floats 2, 2. A rolling detection mechanism 26 is configured to detect a rolling state.

The control valve V ₂ for the horizontal frame 24 and the second cylinder 15 is connected to the pushable wire 27.
The second cylinder 15 is automatically expanded and contracted based on the detection result of the rolling detection mechanism 26, and is configured to prevent the rear fuselage from rolling against the left and right floats 2, 2.

A bracket 19 is extended rearward from near the rear end of the first frame 7a, and both ends of the outer wires 20, 20 are fixed to the bracket 19 and the support member 11, and the swing axis of the support arm 12 is fixed to the bracket 19 and the support member 11. Y positions on both sides and the second frame 7b
Connect the bracket 21 protruding from the inner wire 2
2 and 22, and constitutes a mechanical interlocking mechanism 23 that forcibly operates the rear fuselage in the opposite direction to the rolling direction as the second cylinder 15 expands and contracts.

In summary, the present invention provides the above-mentioned wet field working machine with a mechanical interlocking mechanism 23 that forcibly operates the rear body in the opposite direction to the rolling direction as the fluid pressure cylinder 15 expands and contracts. characterized by something.

In other words, in order to suppress level fluctuations in the horizontal direction with respect to the planting mud surface of the rear body, level changes are detected by the rolling detection mechanism 26, and as the fluid pressure cylinder 15 expands and contracts based on the detection result. Since the aircraft is forced to operate in the opposite direction to the rolling direction with respect to the floats 2, 2, the speed at which the rear aircraft returns to the same level as the left and right floats 2, 2 is the same as the front aircraft attempts to return due to the cylinder 15. Since the speed is the sum of the speed due to the forced operation, for example, if one wheel 1
Even if the level of the hard ground or the level of the planted mud surface changes rapidly, the system can respond quickly and suppress level changes in the horizontal direction relative to the planted mud surface of the rear fuselage with extremely high accuracy as a whole.

Generally, in order to quickly return the rear machine to its cylinder position, it is possible to use a large-capacity hydraulic pump, but in this case, the weight of the wet field work machine increases, and the diameter of the cylinder must be made smaller. However, the configuration of this invention allows the rear aircraft to return quickly without using a large-capacity hydraulic pump or reducing the diameter of the cylinder. .

[Brief explanation of the drawing]

The drawings show an embodiment of the wet field working machine according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is an overall plan view,
FIG. 3 is a perspective view of the main parts, and FIG. 4 is a schematic diagram of a mechanism for automatically raising and lowering the wheels and a drive system for the interlocking mechanism. 1... Wheel, 2... Float, 4... Seedling planting device, 15... Cylinder, 23... Interlocking mechanism, 26
...Rolling detection mechanism, V ₂ ...control valve.

Claims (1)

[Claims for Utility Model Registration] The vehicle is comprised of a front body on which left and right wheels 1, 1 are attached so that they can be raised and lowered in a contradistinct manner, and a rear body on which a seedling planting device 4 equipped with floats 2, 2 is attached; A mechanism 26 is provided which connects the front body and the rear body in a rollable manner and detects rolling of the rear body with respect to floats 2, 2 provided on the rear body, and based on the rolling detection result of the detection mechanism 26. In a wet field working machine equipped with a fluid pressure cylinder 15 that raises and lowers the wheels 1, 1 of the front body in a reverse manner so as to eliminate the rolling, the rear body is moved up and down as the fluid pressure cylinder 15 expands and contracts. A wet field working machine characterized by being provided with a mechanical interlocking mechanism 23 that is forced to operate in a direction opposite to the rolling direction. The wet field working machine according to claim 1, wherein the rolling detection mechanism 26 of the rear body is a mechanism that detects a difference in earth pressure between the left and right floats 2, 2.