JPS62215308A - Wheel up and down control apparatus of agricultural working machine for rice field - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wheel vertical control device for agricultural machinery for paddy fields, such as a two-walking type rice transplanter or a walking-type flooded seeder.

[Prior art]

Conventionally, as disclosed in Japanese Utility Model Application No. 60-194914, a pair of left and right propulsion wheels of a walk-behind rice transplanter is controlled by vertical movement of a pair of left and right ground contact bodies at the bottom of the machine to separate left and right valves of a hydraulic system. A configuration in which the vertical axis is controlled by switching independently is known.

However, in this prior art, the rear fulcrum of the grounding body is attached to a fixed position, and its movement in the front and back direction cannot be adjusted.

[Problem that the invention seeks to solve]

In the conventional technology, when assembling, the front end positions of the pair of left and right grounding bodies are not aligned in the front-back direction and are installed offset from front to back,
Even if the front ends are aligned when assembled, during use, one of the grounding bodies may hit the ridge or be subjected to unexpected resistance, causing it to shift back and forth.

In such a case, the timing of valve switching by the left and right grounding bodies is incorrect, and the left and right wheels are turned upside down and controlled up and down, causing the aircraft to tilt and travel. There was a problem with the operation.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention is configured so that propulsion axles 15 and 16 can be individually moved up and down by hydraulic devices on both the left and right sides of the machine body 1 on which agricultural equipment 5 such as rice transplanting equipment and sowing equipment is attached. , the switching valve 24.25 of this hydraulic system
A pair of left and right grounding bodies 29.30 provided on the lower side of the aircraft body 1.
The left and right propulsion wheels 15 and 16 are independently controlled up and down by switching according to the up and down movement of the left and right grounding bodies 29 and 30, and the ground pressure of the left and right grounding bodies 29 and 30 is maintained within a substantially constant range so that the aircraft body 1 does not tilt left or right. The wheel vertical movement device for a paddy field agricultural machine is configured such that at least one of the grounding bodies 29 and 30 can be set to a vertically movable state by shifting it in the front-rear direction.

[Operations and Effects of the Invention] According to the present invention, if the front ends of the left and right ground contact bodies are not lined up in a straight line from side to side and become misaligned, this can be easily corrected and the aircraft can be prevented from tilting to the left or right. or driving around,
You can easily adjust the tilting movement when moving up and down.

In addition, if the left and right grounding bodies do not shift back and forth due to variations in the hydraulic system, and even though the front ends are on a horizontal straight line, the left and right valves cannot be switched at the same time. Adjustment is possible by moving it backwards, and it is extremely right-handed.

〔Example〕

1 is the body of a walking rice transplanter, which includes a mission case 2, an engine stand 3. It consists of a connecting frame 4, and a rice transplanting device 5 is attached to the rear of the body 1.

6 is a transmission case of rice transplanting device R5, 7 is a seedling mounting table, 8 is a seedling planting tool, 9 is a control handle, 1o is an engine, 11 is a hydraulic unit in which a hydraulic pump, a hydraulic tank, a valve, etc. are integrated. It is. 12 indicates a fuel tank.

Reference numeral 13.14 denotes a pair of left and right chain cases, whose base sides are pivoted on both left and right sides of the transmission case 2 so that they can move up and down freely, and a propulsion vehicle @15.1 is mounted on the outside of the rear end side.
6 is supported on the shaft.

17.18 shows an arm integral with the chain case 13.14.

19.20 is a hydraulic cylinder device, the base side of the cylinder case is pivotally connected to the front end side of the engine stand 3 constituting the aircraft body 1 via a metal fitting, and the pistons 19a, 20a are pivotally connected to the arm 17.18. .

21.22 is a hydraulic pump, 23 is a hydraulic tank.

24.25 are hydraulic valves.

26 and 27 indicate the valve switching arm.

28 is a rear leveling float. 29.30 indicates a pair of left and right grounding bodies, which are provided at the front lower part of the fuselage 1, and whose rear parts can rotate around the pin 33 attached to the connecting frame 4, and are also fixed to the connecting frame 4. Drill long holes in the mounted brackets 31 and 32, and attach pins 36 to the arms 34 and 35, which can be set by adjusting the rotation with bolts and nuts.
37, and the front part is configured to be able to move up and down.

The front sides of the left and right grounding bodies 29.30 are connected to the valve switching arm 26.27 via rods 38.39.

During rice planting work, if the tiller in the paddy field is tilted to the left or right, of the left and right propulsion wheels 15 and 16, the side where the tiller changes higher is pushed up and the other is lowered, causing the machine 1 to tilt left and right. Then, the grounding body 29 or 30 on the side that moves upward
is suspended and moves downward, and conversely, the grounding body 30 or 29 on the side tilting downward is pushed up by the soil surface.

For this reason, the left and right hydraulic valves 24, 25 are connected to the rod 38,
The wheel 15 or 16 on the side that is switched in the opposite direction via 39 and pushed higher is a hydraulic cylinder device i! 1
The 9 or 2o piston is retracted and moved upward, and the piston on the opposite side is protruded and moved downward. In this way, the aircraft 1 is braked so as not to tilt left or right.

In this way, the left and right propulsion axles 15 and 16 are hydraulically braked vertically, but when the grounding body 29 or 30 on that side hits the ridge during rice planting work near the ridge. rod 3
If 8 or 39 is bent or only one ground contact body is distorted and the front part of that ground contact body is not aligned to the left or right, the left and right hydraulic valves 24 and 25 may be damaged while driving on a smooth plow or soil surface. However, it may happen that the vehicle is being driven leaning left or right. In such a case, rotate the arm 34 or arm 35 to which the grounding body is attached around the pin 33, adjust the position of the pin 36 or 37 back and forth, and set the arm 34 or 35 using bolts and nuts. It can be corrected by fixing it.

An arm 40 that lifts the left and right valve switching arms 26 and 27 at the same time is connected to a hand lever 41 with a wire 42, and when turning, the lever 41 is operated to simultaneously lift the valves 24 and 27.
．． 25 is a common practice.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view, FIG. 2 is a plan view, FIG. 3 is a hydraulic circuit diagram, and FIG. 4 is a perspective view of the main parts. In the figure, symbol 1 is the aircraft body, 5 is the agricultural equipment, 15.16 is the propulsion wheel, 24.25 is the hydraulic switching valve, and 29.30 is the grounding body.

Claims (1)

[Claims] Aircraft 1 equipped with agricultural equipment 5 such as rice transplanting equipment and sowing equipment
The propulsion wheels 15 and 16 on both the left and right sides are configured so that they can be operated up and down separately by hydraulic devices, and the switching valve 2 of this hydraulic device
A pair of left and right grounding bodies 2 with 4 and 25 provided on the lower side of the fuselage 1
The left and right propulsion wheels 15 are switched by vertical movement of 9 and 30.
, 16 are independently controlled up and down, and the left and right grounding bodies 29, 30
In a wheel vertical movement device configured to maintain the ground pressure within a substantially constant range so that the aircraft body 1 does not tilt from side to side,
A wheel vertical control device for a rice paddy agricultural machine, which is provided so that at least one of the grounding bodies 29 and 30 can be set to a state where it can be moved up and down by shifting it in the front-back direction.