JPH022563B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a mechanism for moving the two running wheels toward the aircraft by swinging back and forth a seesaw arm that is interlocked with the left and right running wheels, and by moving the mounting member of the seesaw arm back and forth. The level can be integrally and relatively changed, and the ground float is configured to be able to support the aircraft in a state where the traveling wheels are raised above the ground, and the level of both the traveling wheels relative to the aircraft is the same. Alternatively, a walk-behind rice transplanter is provided in which the swinging of the seesaw arm with respect to the mounting member is fixed in almost the same state, and the lock mechanism biased toward the active side can be switched to the non-active state and maintained. Related to wheel lifting device.

The walk-behind rice transplanter has left and right wheels that move up and down in opposite directions, so that the machine body can be maintained almost horizontally regardless of the left-right inclination or unevenness of the tiller. In addition, when the above-mentioned rice transplanter is turned around near the edge of a bank, the left and right wheels are generally fixed using a locking mechanism so that they do not rise or fall, and the rice transplanter can be operated in a stable state where the left and right weights are easily balanced. At the same time, the left and right wheels are lowered to raise the aircraft, and the ground float is floated above the ground to prevent mud from pushing. However,
In order to activate the locking mechanism, conventional systems require tilting the aircraft so that the left and right wheels are at the same level relative to the aircraft, which is time-consuming and labor-intensive; It was necessary to lower the seesaw arm to the end, place the seesaw arm against the stopper, and bring it into a position relative to the attachment member where the locking mechanism would operate, which was time-consuming.

The present invention aims to make it possible to easily and quickly fix the left and right wheels at the same level relative to the aircraft, thereby making it possible to easily and quickly turn the aircraft in the above-described attitude. purpose.

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

As shown in FIGS. 1 and 2, it has an engine E mounted in front of a pair of left and right driving wheels 1a, 1b, and a control handle 2, etc. disposed behind the wheels 1a, 1b. At the rear of the self-propelled aircraft, four seedling planting tools 3 are arranged in parallel in the lateral direction of the aircraft, and a seedling stand 4 for supplying seedlings to these seedling planting tools 3 is provided, and below the self-propelled aircraft, One front grounding float 5 and three rear grounding floats 6...
A walk-behind rice transplanter capable of planting four rows is constructed.

As shown in FIGS. 2 to 4, the ends of the pair of transmission cases 7a and 7b, opposite to the wheel mounting side, which respectively support the left and right wheels 1a and 1b, form the fuselage. A pair of left and right guide rods 10, 1 that are pivotally connected to the transmission case 8 and fixed to the cylindrical fuselage frame 9 in the longitudinal direction of the fuselage.
A seesaw arm 13 is pivotably connected to a mounting base 12 which is slidably attached to a hydraulic cylinder 11 at
and the other free end of the seesaw arm 13 and the arm portion 14b of the other transmission case 7b.
are pivotally connected by push-pull rods 15, so that the level of the left and right wheels 1a, 1b relative to the aircraft changes integrally and in opposite directions by the back and forth swinging of the seesaw arm 13, and also includes a mounting base. 1
By moving 2 back and forth, the left and right wheels 1a,
It is configured so that the aircraft level of 1b can be changed integrally and in the same direction. That is, by raising and lowering the left and right wheels 1a and 1b in opposite directions, the machine body is maintained almost horizontally regardless of the horizontal inclination or unevenness of the tiller, and by operating the cylinder 11, the machine body can be raised and lowered from the ground. It can be done.

As shown in FIG. 5, the swinging motion of the seesaw arm 13 with respect to the mounting base 12 is fixed by engaging the mounting base 12 in a state where the left and right wheels 1a, 1b are at the same or almost the same level relative to the aircraft body. The pin 16, which is an example of a locking mechanism, is connected to the spring 1.
It is attached to the seesaw arm 13 so as to be vertically slidable in a state where it is biased toward the action side by the lever 7. When the lock pin 16 is interlocked with the operating lever 19 of the seedling planting clutch (not shown) by the operating wire 18 and the operating lever 19 is operated to the clutch release position (OFF), the operating wire 18 is loosened and the spring is released. 17, the operation lever 19 is in an operational state in which it can be engaged with the mounting base 12, and the operating lever 19
When the lever is operated to the clutch engaged position (ON) and is locked and fixed by the lever guide 20, the lever is pulled down against the spring 17 by the operating wire 18, and is brought into a non-operating state in which it is impossible to engage with the mounting base 12. It is configured so that it is switched and maintained in that state. A pair of coil springs 21, 21 as an example of a mechanism for biasing the seesaw arm 13 to a position relative to the mounting base in which the left and right wheels 1a, 1b are at the same or almost the same level relative to the aircraft.
is stretched across the seesaw arm 13 and the bracket 12a extending from the mounting base 12. To configure the operating structure of the cylinder 11, as shown in FIG. An operating tool 27 is swingably attached to the first L-shaped link 24 and linked to the first L-shaped link 23 via a slidable push-pull rod 25 and a push-pull wire 26. Operating tool 27
is operated from the neutral position (N) to the first operation position (DN), the push/pull rod 25 is moved by the wire 26.
is pushed and slid toward the valve V side and the 1st L-type link 2
The downward lever portion of 3 is pushed and swung toward the valve V side by the push/pull rod 25 via the pin 28 attached thereto, and the spool is pushed and operated to open the cylinder 1.
1 is driven to the rising side of the wheels 1a and 1b relative to the aircraft,
When the operating tool 27 is operated from the neutral position (N) to the second operating position (UP) opposite to the first operating position (DN), the push/pull rod 25 is moved to the opposite side of the valve V by the wire 26. The downward lever portion of the first L-shaped link 23 is pushed and swung by the push-pull rod 25 through the pin 28 to the side opposite to the valve V, and the spool is pulled out and the cylinder 11 is moved to the wheel 1a. It is designed to be driven toward the lowering side of the aircraft body of 1b. Furthermore, while the operating tool 27 is being operated from the neutral position (N) to the second operating position (UP), the second L-shaped link 29 is moved by the pushing action of the protrusion 25a of the sliding push-pull rod 25. It is swung in the A direction, and
The horizontal lever part of the 2L-shaped link 29 pushes down the horizontal lever part of the first L-shaped link 23, and the pin insertion hole of the push-pull rod 25 is a long hole, so that the first L-shaped link 23 is pushed down. The downward lever portion is swung toward the valve V side, so that the cylinder 11 is driven toward the upward movement of the wheels 1a and 1b relative to the aircraft body.

With the above configuration, when the operating lever 19 is operated to the clutch disengaged position (OFF) and the operating tool 27 is operated to the second operating position (UP), first the left and right wheels 1a,
1b are both raised relative to the aircraft body, but as the aircraft body is supported by the four ground floats 5, 6..., the left and right wheels 1a, 1b are in a state of floating from the plowing platform, and the seesaw arm 13 is moved by the spring. 21, the left and right wheels 1a and 1b are placed in a position relative to the mount so that the level relative to the aircraft is the same or almost the same, and accordingly, the lock pin 16 is automatically engaged with the mount 12 by the spring 17, and the left and right wheels 1a, 1b is fixed at the same or almost the same level with the aircraft, and
The left and right wheels 1a, 1b are lowered relative to the aircraft to the stroke end, and the aircraft is placed on four ground floats 5, 6...
This results in a state where the body is rising above the ground, rising above the mud surface.

In summary, the present invention provides the above-mentioned wheel lifting device for the walking rice transplanter, in which both the walking wheels 1
The seesaw arm 1 is placed in a position relative to the mounting member in which the levels of a and 1b relative to the aircraft are the same or almost the same.
3 is characterized in that it is provided with a mechanism 21 that urges it.

In other words, before the wheels 1a and 1b are operated to lower the aircraft, a lifting operation for the aircraft is performed. Then, as the machine body is supported by the ground floats 5 and 6, the left and right wheels 1a and 1b are in a state of floating from the tiller, and their level relative to the machine body is adjusted by the biasing mechanism 21.
The locking mechanism 16 automatically operates in the same or almost the same manner due to the action of the locking mechanism 16. Therefore, it is possible to fix the left and right wheels 1a, 1b at the same level relative to the aircraft by simply lifting the wheels.
(b) can now be done by simply taking a short enough time to rise from the plowing platform, making it possible to easily and quickly turn the aircraft in the above-mentioned position.

[Brief explanation of drawings]

The drawings show an embodiment of the wheel lifting device for a walk-behind rice transplanter according to the present invention; FIG. 1 is an overall side view of the rice transplanter, FIG. 2 is an overall plan view of the rice transplanter, and FIG. 3 is a diagram of the wheel lifting device. FIG. 4 is a plan view, FIG. 4 is a side view of the wheel lifting device, FIG. 5 is a sectional view of the lock pin mounting portion, and FIG. 6 is a side view of the cylinder operating structure. 1a, 1b...Wheel, 5, 6...Grounding float, 12...Mounting member, 13...Seesaw arm, 16...Lock mechanism, 21...Biasing mechanism.

Claims (1)

[Claims] 1. By swinging back and forth the seesaw arm 13 interlocked with the left and right running wheels 1a, 1b, and by driving the mounting member 12 of the seesaw arm 13 back and forth, the level of both the running wheels 1a, 1b relative to the aircraft is adjusted. are integrally and relatively changeable,
The ground floats 5 and 6 are connected to the traveling wheels 1a and 1.
The seesaw arm 13 is provided in such a way that it can support the aircraft in the elevated state above the ground, and the seesaw arm 13 is swung relative to the mounting member 12 in a state where both the traveling wheels 1a and 1b are at the same or almost the same level relative to the aircraft. A wheel lifting device for a walk-behind rice transplanter, in which a lock mechanism 16 that fixes the motion and is biased toward the active side can be switched to a non-active state and maintained at will,
Wheel lifting/lowering of a walk-behind rice transplanter, characterized in that a mechanism 21 is provided for biasing the seesaw arm 13 to a position relative to the mounting member in which both traveling wheels 1a, 1b are at the same or almost the same level relative to the machine body. Device.