JPH01174305A - Walking type paddy working machine - Google Patents

Abstract

PURPOSE:To prevent turning performance at a butt from deteriorating while improving an accuracy in detecting inclination by a center float, by linking auxiliary ground contact parts equipped at the front right and left positions of the center float to connecting-disconnecting operation of the operating clutch lever to carry out vertical movement. CONSTITUTION:An operating clutch lever 19 is operated at the connection side of the operating clutch and auxiliary ground contact parts 15a and 15b are operated for lowering during ordinary working travel. The operating clutch is operated disconnection by the operating clutch lever 19 and the auxiliary ground contact parts are operated for raising in case of turning on a butt.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to rolling control for keeping the machine body parallel to the rice field in a walking rice paddy working machine typified by a walking rice transplanter.

[Conventional technology]

A walk-behind rice transplanter, which is an example of a walk-behind rice paddy work machine, performs lift control to maintain a constant height of the machine from the rice field surface in order to maintain a constant planting depth of seedlings. Detection is performed by a center float that is movable up and down and protrudes forward from the left and right wheels at the bottom of the center of the left and right sides of the aircraft.

In recent years, research has begun on configurations that add a rolling control function that corrects the left and right tilt of the aircraft to keep it parallel to the rice field in addition to this elevation control. As an example, there is a model in which the center float 1- is installed so that it also performs rolling motion, and the center float is configured to detect vertical motion and rolling motion of the aircraft body.

[Problem that the invention seeks to solve]

In the model before adding the rolling control function, the center float had the function of not only detecting the vertical movement of the aircraft, but also suppressing the pitching movement of the entire aircraft, so the shape of the center float was elongated in the longitudinal direction of the aircraft. It was in shape. Therefore, even if this center float is made to be able to move up and down as well as roll, and a rolling control function is added, the width of the center float is relatively narrow, so it is difficult to tilt the aircraft from side to side depending on the muddy condition of the rice fields, etc. Accurate detection may not be possible.

Therefore, there is a method of expanding the width of the front part of the center float by connecting and fixing auxiliary grounding parts to the left and right parts of the front part of the center float.This improves the accuracy of tilt detection by the center float during normal planting travel. However, when turning at a headland after one planting stroke to move on to the next planting stroke, the sensitive inclination detection by the center float may have the opposite effect. In other words, if the center float sensitively detects unevenness on a relatively rough headland and the left and right wheels are moved up and down, it becomes difficult to perform turning maneuvers.

The present invention has focused on the above-mentioned problem, and aims to improve the accuracy of inclination detection using a center float during normal work travel, while also preventing deterioration in turning performance on headlands.

[Means for solving problems]

The features of the present invention are that, in the above-mentioned walk-behind paddy field work machine, the auxiliary grounding part is attached to the front left and right parts of the center float so that its position can be changed in the vertical direction, and the work thalasso tip lever for turning on and off the work clutch is turned on. The working thalasso tilter and the auxiliary grounding part are interlocked and connected via a linking mechanism so that the auxiliary grounding part is raised in conjunction with the operation, and the auxiliary grounding part is lowered in conjunction with the engaged operation of the working thalassotile lever. In particular, its functions and effects are as follows.

[For production]

With the above configuration, during normal work driving such as planting, the work thalassotile lever is operated to the side where the work clutch is engaged, so the auxiliary ground contact parts on the left and right parts of the front part of the center float are lowered and the auxiliary The ground contact area will be in sufficient contact with the ground, and the tilt of the aircraft will be sensitively detected by the center float.

On the other hand, when turning on a headland, the work clutch is disengaged by the work cod lever to stop the work device and perform the turning maneuver. In this case, the auxiliary grounding part is lifted up and the auxiliary grounding part does not touch the ground sufficiently, and the sensitivity of detecting the inclination of the aircraft body by the center float becomes insensitive. As a result, even if there are many irregularities on the headland, the center float will not detect these irregularities particularly sensitively, and the turning maneuver will not be hindered.

〔Effect of the invention〕

As mentioned above, while accurately detecting inclination using the center float during normal work driving,
We were able to suppress the decline in turning maneuverability on the headland. Furthermore, since the raising operation of the auxiliary ground contact part is automatically performed in conjunction with the operation of the working clutch lever to the disengaged side, which is an operation that should be performed immediately before turning on a headland, the raising operation of the auxiliary ground contact part can be performed automatically. It is possible to prevent forgetting to operate, which would be expected if the configuration is such that the operation is performed using a separate lever.

In particular, if the auxiliary ground contact section is raised until the bottom surface of the auxiliary ground contact section is above the bottom surface of the center float, it is possible to raise the auxiliary ground contact section until the bottom surface of the center float is higher than the bottom surface of the center float. This prevents deformation or damage to the auxiliary grounding part itself or its supporting members due to collision with a raised object, etc., and changes the inclination detection characteristics when working with the auxiliary grounding part lowered. itself can be avoided.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A walking rice transplanter, which is one embodiment of the present invention, will be described below with reference to the drawings.

As shown in Figures 2 and 3, there are running wheels (
A transmission case (1) equipped with a transmission case (2) is attached to swing freely around the horizontal axis (p+) to support the aircraft, an engine (3) is provided at the front of the aircraft, and a planting arm (4) is installed at the rear of the aircraft. ) and a seedling stand (5), etc., and a control handle (6), as well as a center float (7) at the bottom of the fuselage that detects the vertical movement and left/right tilt of the aircraft. It constitutes a rice transplanter.

To explain in detail the vertical movement structure of the wheel (2), the second
As shown in Figures 3 and 3, a balance arm (10) is swingably supported around the vertical axis at the tip of a piston rond (9a) of a single-acting lifting cylinder (9) fixed to the fuselage. ,
Both ends of this balance arm (10) and the transmission case (1)
The operation arm (la) installed upright on the boss part of the rondo (1
1) and a double-acting rolling cylinder (12).

With the above structure, the left and right wheels (2) are simultaneously moved up and down by the expansion and contraction operation of the lifting cylinder (9), and the piston rod (10) is moved by the expansion and contraction operation of the rolling cylinder (12). The tip is operated to swing, and the left and right wheels (2) are operated to move up and down contrary to each other.

Next, to explain the center float (7) in detail, as shown in FIGS. 1 and 3, the center float (7)
) is attached to the fuselage so that it can freely swing up and down around the transverse axis (P2) in the left-right direction of the fuselage, and roll freely around the longitudinal axis (P3) of the fuselage. An operating arm (13) is installed in front of the center float (7),
This operating arm (13) allows the center float (7) to
a rolling control valve (8) whose front part is supported to be able to roll freely around a longitudinal axis (P3) and to be able to move up and down, and which performs operation to supply and discharge hydraulic oil to and from the rolling cylinder (12); They are linked via the operating arm (13), hellcrank (14), and linkage rondo (18). This causes the aircraft to tilt left and right with respect to the rice field, and the rolling control valve (8) is operated in a direction to correct this.

Next, to explain in detail the auxiliary grounding parts (15a) and (15b) provided at the front left and right parts of the center float (7), as shown in Fig. 1.2.3, the front end of the center float (7) From the support frame (1
6) is extended, and the auxiliary grounding portion (
15a) and (15b) are attached. On the other hand, the support part (
21) supports two sets of balance arms (17) that are swingable around the front and rear axis (P), and the outer ends of the balance arms (17) and the left and right auxiliary grounding parts (15a),
(15b) is connected to the rear part of the lever (15b) via the rond (18), and the inner end of the balance arm (17) and the working thalassotile lever (
A planting clutch lever (19) is connected to the planting clutch lever via a bushing full wire (20) as a linkage mechanism.

The state shown in Figures 1 and 3 is the planting thalassotile lever (1
9) to the planting clutch engagement side and is locked in this position, and in this state, the bushing full wire (20) is pulled and the left and right auxiliary grounding parts (15a)
, (15b) is being operated down. In this state, the left and right auxiliary grounding parts (15a).

The bottom surface of (15b) is located slightly below the bottom surface of the center float (7). When the planting clutch lever (19) is operated to disengage the planting clutch, the pushing action of the bushing full wire (20) and the spring (22)
The auxiliary grounding portion (15a), (15
The auxiliary grounding parts (15a) and (15b) are pulled upward until the bottom surface of the center float (7) is above the bottom surface of the center float (7).

Further, the present invention can be applied not only to a walking type rice transplanter but also to a walking type rice field direct seeding machine.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the walking type paddy field work machine according to the present invention,
Figure 1 is a front view of the front part of the center float and the vicinity of the auxiliary grounding part, Figure 2 is a plan view showing the vertical movement structure of the center float, auxiliary grounding part, and left and right wheels, and Figure 3 is the overall side view of the walk-behind rice transplanter. It is a diagram. (2)...Wheel, (7)...Center float, (15a), (15b)...Auxiliary grounding part, (19)...Work thalassotile liver,
(20)... Linkage mechanism, (P3)...
Anteroposterior axis.

Claims (1)

[Claims] 1. A center float (7) that can move vertically and freely roll around the longitudinal axis (P_3) of the fuselage;
It is provided at the lower center of the left and right sides of the aircraft, protruding forward from the left and right wheels (2), and the height difference between the left and right wheels (2) is changed based on the rolling motion of the center float (7), and the aircraft is moved to the rice field. This walking type paddy field work machine is equipped with a rolling control means to keep the center float parallel to the ground, and the center float (7) is provided with auxiliary ground contact parts (15a) at the left and right parts of the front part of the center float (7).
, (15b) are installed so that their positions can be changed in the vertical direction, and a working clutch lever (19
) in conjunction with the cutting operation of the auxiliary grounding portion (15a), (
15b) is raised and the working clutch lever (19)
The auxiliary grounding parts (15a) and (15b)
) is operated so that the working clutch lever (19) is lowered.
and the auxiliary grounding parts (15a) and (15b) by the linkage mechanism (2
A walking type paddy field work machine that is interlocked and connected via 0). 2. In conjunction with the turning operation of the working clutch lever (19), the auxiliary ground contact portion (
15. The walking type paddy field working machine according to claim 1, wherein the bottom surfaces of 15a) and 15b are linked so that they can be raised upward.