JPS6225909A - Running apparatus of rice field running agricultural workingmachine - 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 This invention relates to a traveling device for a rice field traveling agricultural machine, and can be used in rice transplanters, seeding machines, etc.

Conventional technology and problems to be solved by the invention By moving the relationship between the running wheels of the rice transplanter and the float up and down,
In a configuration in which control is performed to maintain a balance between the supporting force of the traveling wheels in contact with the soil tillage plate and the supporting force of the soil surface of the float, the operating resistance of the hydraulic switching valve for control is reduced depending on the hardness and softness of the traveling soil. There is a technique for adjusting by changing the spring pressure, but the configuration is complicated and the adjustment is difficult to stabilize.

Means for Solving the Problems This invention provides a grounding body (1
), while detecting the relative vertical position of the running wheel (2) rotating the soil tillage section and the float (3) sliding on the soil surface,
A detection valve (5) which is switched and activated by the vertical movement of the grounding body (1) in a paddy field agricultural working machine that is controlled to maintain the working device (4) at a constant position on the soil surface by adjusting the supporting force with the grounding body (1). The traveling device is configured such that the angle of the vertical sliding axis direction can be freely changed.

Function of the Invention When working in paddy fields, the running wheels (2) sink deeply into the soil plowing section and rotate, and the floats (3) slide on the soil surface, thereby preventing the running vehicle body, working equipment, etc. It advances while supporting the weight, and the grounding body (1) comes into contact with this soil surface part to detect the depth of the soil part on the soil plowing part, and switches the detection valve [5] to detect this soil. When the soil is deep, the vertical distance between the running wheel (2) and the float (3) is increased, and when the soil is shallow, the distance between the running wheel (2) and the float (3) is increased. (3) While balancing the supporting force,
Attempts to maintain the working equipment in a fixed position above the soil surface.

The detection valve (5) is moved in the sliding axis direction by the vertical movement of this grounding body (1), and the angle of the detection valve (5) in the sliding axis direction with respect to the vertical movement direction by this grounding body (1) changes. The sliding resistance in the axial direction of the detection valve (5) is changed, and the vertical movement direction of the grounding body (1) and the sliding axis direction of the detection valve (5) closely match, i.e. , detection valve +5) when the angle in the sliding axis direction is small, this sliding resistance is small, and conversely, as this angle becomes large, the sliding resistance becomes large.

Therefore, under conditions where the running soil is hard, by increasing the angle of the detection valve (5) in the sliding axis direction, the soil detection sensitivity of the grounding body (1) becomes insensitive, and Under conditions where the sliding axis is weak, the detection sensitivity can be made more sensitive by reducing the angle in the sliding axis direction.

Effects of the Invention In this way, the vertical sliding axis direction of the detection valve (5) that controls the vertical distance between the traveling wheel (2) and the flow 1-(3) is adjusted relative to the vertical movement direction of the grounding body (1). By changing the angle of the detection valve (5), the switching resistance in the sliding axis direction can be changed, and the sensitivity can be adjusted in response to changes in the hardness and softness of the soil, compared to adjustment using only a spring mechanism. Therefore, the configuration for changing the sliding axis direction of the detection valve (5) can be simplified, and the adjustment can be stabilized by the sliding resistance.

Embodiment In the illustrated example, the grounding body (1) and the float (3) have a dual-purpose configuration, and are connected to the rear of the tractor body (6) by a lowering link (7) so as to be able to move up and down. Working equipment (
4) constitutes a seedling planting device, in which a plurality of floats (3) are arranged in the left and right directions, and the central float (3) is arranged in the left and right directions.
31 is a grounding body (1). Each float (3) has its rear pivot shaft (10) relative to the body (9) of the seedling planting device (4).
It is provided so that it can be rotated up and down from the front end side.

In addition, the seedling planting device (4) includes a seedling tank (1)) which accommodates and supplies seedlings above the machine body (9), and this seedling tank (1)).
A planting device for separately planting seedlings fed out at the lower rear end f;l
ill73 etc. are provided. At the front of the aircraft (9),
An integrated bracket (8) is provided, and a bending link (1Φ (19) connected by a pin (+31) is connected between the front end of the grounding body (1) and the bracket (8) side is connected to a pin ().
0, and the grounding body (1) side is pivoted at pin +17). In addition, the bell crank (18) is pivotally attached to the bracket (8) with a pin (blood), and the front end of this bell crank f19 is
It is connected to the sensitivity adjustment lever ff1) 1 near the cockpit QO with a wire (2Xl) and can be rotated freely.
Pinch the front side of the cylinder (toward) of the detection valve (5)
A spring (
2S) and are connected in tension.

This detection valve C5) is a switching valve that switches the hydraulic circuit between the cylinder (2) and a spindle (2e) that is fitted into this cylinder (d) and can freely slide in the vertical direction.This spindle C2e The lower end of the above grounding body (
When this grounding body (1) is at the lower limit height position, the axial direction of this spindle C!Q is in a vertical posture, and this grounding body (1) ) The rear end support shaft (1ω) of the pin (171) is set so that its vertical rotation locus is at a tangential position so that it can operate sensitively.

The tractor is equipped with a rear wheel and a front wheel, which are running wheels (2), a motor shaft, a driver's seat, and a steering wheel.
[tl etc. are provided, and the prime mover (2I) drives these traveling wheels (2) and the front@(d), and also transmits power to each part of the seedling planting device (4) from the rear power take-off shaft.In addition, a hydraulic pump The detection valve (5) is interposed in the hydraulic circuit of the hydraulic pump to interlock the hydraulic telescopic cylinder that moves the elevating link (7) up and down. When the grounding body (1) is raised above a certain range due to the ground contact pressure with the soil surface, the hydraulic telescopic cylinder is extended and the lifting link (7) is rotated upwardly relative to the vehicle body (6), thereby forming a seedling planting device. (4) increases, and
On the other hand, when the ground pressure lowers the seedlings to below a certain range, the lifting link (7) is rotated downward to lower the seedling planting device (4), regardless of the depth of the soil. Control is interlocked so that it is always maintained in a fixed position and propelled.

As the tractor runs, the seedling planting device (4) floats (
3) is propelled while sliding on the ground, and the seedling tank (1))
The seedlings supplied to the seedlings are transplanted using a planting device.During this seedling planting operation, if the soil is at an appropriate depth, the float (3) and grounding body (1) simply move up and down slightly. The weight of this seedling planting device (4) is the same as that of the lifting link (
7) and is supported by running wheels (2) and a float (3) via hydraulic telescopic cylinders and the like that raise and lower it.

When the soil gets deeper than a certain range, the sliding pressure of the float (3) increases, so the grounding body (1) detects this and pushes up the spindle (2G) to raise the detection valve (5) from the neutral position. position, and raise the elevating link (7) and the seedling planting device (4) by an appropriate amount relative to the vehicle body (6).As a result, the grounding body (1) is moved down again and the detection valve (5) is also in the neutral position. It returns to the neutral position and stabilizes. Also, the seedling planting device (4) is lowered by switching from the soil surface to the lowered position, and the grounding body (1) returns to the neutral position and becomes stable. In this way, the grounding body (1) By detecting changes in soil depth, the detection valve (5) is switched to maintain the seedling planting device (4) at a constant position relative to the soil surface. The planting depth of seedlings planted on the soil surface is determined by sea chemotaxis.

Such control conditions also change depending on changes in the hardness and softness of the soil surface. If the soil is soft, the whole will tend to sink, whereas if it is hard, it will tend to float up. In particular, the grounding body that comes into contact with the soil surface (
1) is easily affected by this hard and soft soil change.

Therefore, when the hardness and softness of this soil changes significantly, use the sensitivity adjustment lever c! as shown in Figure 4. By adjusting an appropriate amount of 1), the soil detection sensitivity of the detection valve (5) is adjusted. In soft soil, in order to make the detection sensitivity of this detection pulse (5) more sensitive, loosen the tension on the wire (2) (A) and weaken the tension on the spring C!9.

The detection valve (5) is in a nearly vertical state as shown in Figure 1, and the spindle (2G) vertical movement relative to the cylinder (2) is easy to perform, the grounding body (1) is easy to move vertically, and the sensitivity is Becomes sensitive.

In addition, in hard soil, if you pull the wire (2δ (b) and rotate the bell crank (1 [1) against the spring c!9, this spring I2!1 will cause the spindle r2e and the cylinder (a is the spindle Since I2Q and the cylinder (to) are changed from a vertical posture to an inclined posture as shown in Fig. 2, the pressing edge of the grounding body (1) is large due to the tension of the spring Q9 through the bending link (1410E). At the same time, the upward sliding resistance of the spindle l12e with respect to the cylinder (5) also increases, and the upward movement of the grounding body (1) is braked, so that the detection valve (5), especially when moving into deep soil, increases. The detection switching becomes insensitive and the seedling planting device (4) cannot be shaken up and down.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIGS. 1 and 2 are side views showing some of the functions, FIG. 3 is a plan view thereof, and FIG.
The figure is a partial operational side view, FIG. 5 is a side view, and FIG. 6 is a plan view. In the figure, code (1) is the grounding body, (2) is the running wheel, and (3)
is a float, (4) is a working device (seedling planting device), (5)
indicates the detection valve 6

Claims (1)

[Claims] By the grounding body (1) that is in contact with the soil surface and can move up and down,
While detecting the relative vertical position of the running wheel (2) that rotates the soil tillage section and the float (3) that slides on the soil surface, the supporting force between the running wheel (2) and the float (3) is adjusted. In a paddy field traveling agricultural machine that is controlled to maintain a working device (4) at a constant position on the soil surface, the ground-contacting body (1)
The traveling device is provided with a detection valve (5) which is switched and actuated by the vertical movement of the sensor valve (5), and the angle in the vertical sliding axis direction can be freely changed.