JPH01112909A - Structure for detecting inclination of paddy field working machine - Google Patents

Abstract

PURPOSE:To prevent unexpected breakage of a crank arm, by protecting the crank arm extending from a crank shaft from outside by a bracket for supporting the crank shaft. CONSTITUTION:A supporting bracket 15 is allowed to extend forward from a planting mission 1 situated upward ground sensors 6a and 6b and a pair of crank shafts 7 and 8 are oppositely arranged on a straight line rotatably around the shaft core P3. Crank arms 7a and 8a are allowed to extend at both outer ends of the crank shaft and crank arms 7a and 8a are connected through a rod 16 to front parts of ground sensors 6a and 6b.

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 surface in a paddy field working machine typified by a rice transplanter.

[Conventional technology]

Research is being conducted on rolling control to keep the seedling planting device parallel to the rice field surface in a riding type rice transplanter, which is one of the paddy field working machines. There are the following inclination detection mechanisms for:

In other words, a pair of ground sensors that can move up and down independently are arranged on the left and right sides of the seedling planting device, and a pair of crankshafts are supported so as to be fully rotatable in the left and right direction of the seedling planting device. Each of the extended crank arms is connected to a ground sensor via a rond, etc., and the vertical movement of the left and right ground sensors when the seedling planting device is tilted with respect to the field surface is detected as rotational movement of the crankshaft. It is a structure.

[Problem that the invention seeks to solve]

Since the ground sensors are provided at both left and right ends of the seedling planting device in order to improve the accuracy of tilt detection, the crank arms of the crankshaft are also placed near both left and right ends of the seedling planting device. As a result, there was a risk that the crank arm, which transmits the vertical movement of the grounding sensor to the crankshaft as the tilt of the seedling planting device, would come into contact with an external interference and be damaged unexpectedly.

The present invention focuses on the above-mentioned problem and aims to simply provide a structure that can prevent unexpected damage to the crank arm.

[Means to solve the problem]

The feature of the present invention is that the inclination detection structure of the rice paddy working machine as described above is configured as follows. In other words, a pair of ground sensors that can move up and down independently are arranged on the left and right sides of the machine, and a pair of crankshafts are rotatably supported in the left and right direction of the machine via support brackets, and a pair of ground sensors are placed on the inside of the machine from the support bracket. A crank arm extends from the crankshaft, and the crank arm and the ground sensor are connected to each other so that the vertical movement of the left and right ground sensors is converted into rotational movement of the crankshaft and transmitted to the tilt detection mechanism. The functions and effects are as follows.

[For production]

With the above configuration, the crank arm extending from the crankshaft is protected from the outside by the existing member, the support bracket for the crankshaft.

〔Effect of the invention〕

As described above, by making slight modifications to the existing crankshaft support bracket, the risk of the crank arm being damaged due to contact with external interference can be reduced, and the tilt detection mechanism can be improved. We were able to improve reliability.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings regarding a riding type rice transplanter which is an example of a paddy field working machine.

As shown in Figure 4, the planting claw (2) is rotatably driven at the rear of the planting mission (1), and the seedling stand is slid and driven on the guide rail (3) at the top of the planting mission (1). (4) etc. constitute a seedling planting device, and this seedling planting device is connected to the traveling body (not shown) via a recirculating link mechanism (5) so as to be able to rise and lower freely, and the recirculating link mechanism (5
) is attached so that it can roll freely around the front and rear axis (P, ).

As shown in the figure, a double-acting hydraulic cylinder ( 12)
is installed, and by expanding and contracting this hydraulic cylinder (12), the entire seedling planting device is rolled around the front-rear axis (Pl).

Next, we will explain in detail the mechanism for detecting the horizontal inclination of the seedling planting device with respect to the rice field surface.As shown in Figs. Ground sensors (6a) and (6b) that can be freely swung up and down.
is installed. the ground sensor (6a);
(6b) A support bracket (15) extends forward from the planting mission (1) located above, and a pair of cranks are rotatable around the axis (P3) of this support bracket (15). The axes (7) and (8) are arranged facing each other on a straight line. Then, the crankshaft (7), (8
), the first crank arms (7a) and (8a) extend toward the rear of the machine from the crankshafts (7) and (8) on the inside of the machine from the support bracket (15), and , this first crank arm (7a)
, (8a) and the front portions of the ground sensors (6a), (6b) are connected via a rod (16).

On the other hand, on the side opposite to both crankshafts (7) and (8), there is a second crank arm (
7'b) and (8b) are provided, and this second
An arm (9) is installed across both ends of the crank arms (7b) and (8b), and the center point of the arm (9) and the control valve (10) for the hydraulic cylinder (12) are connected to the link rod (11). ) are connected via. The seedling planting device is tilted to the rice field, and the left and right ground sensors (6a)
, (6b) moves up and down, the movement of the arm (9) is as follows.

As shown in Figures 1 and 2, when the seedling planting device tilts to the right in the direction of travel and the right ground sensor (6b) swings upward, this movement causes the rod (16) and the first crank to move upward. It is transmitted to the crankshaft (8) via the arm (8a), and the arm (9) is rotated by the second crank arm (8b) around the connection point with the other second crank arm (7b). When the arm (9) operates in this way, the center of the arm (9) is displaced upward from the axis (P3) which is the rotation axis of the crankshafts (7) and (8), and this displacement causes the seedling to be planted. The tilt of the attached device is detected and transmitted to the control valve (10). As a result, hydraulic oil is supplied and discharged from the control valve (10) to the hydraulic cylinder (12), and a rolling operation is performed so that the seedling planting device is parallel to the field surface.

In addition, if the entire seedling planting device is displaced downward and the left and right ground sensors (6a) and (6b) are displaced upward, both crankshafts (7) and (8) are The second crank arm (7b) rotates in the same direction.
Since the protruding direction of (8b) is in the opposite direction, the arm (9) will rotate around the axis (P,), and the center of the arm (9) will be closer to the axis (P3). There is no displacement.

In addition, the flow I-(
Reference numeral 13) is for lifting and lowering control, and is mounted so as to be vertically swingable around the horizontal axis (P2). The vertical movement of the float (13) is detected and the four-speed link mechanism (5) controls the entire seedling planting device to rise and fall to maintain it at a constant height above the mud surface.

Incidentally, the inclination detection structure of the present invention can also be applied to walking type rice transplanters and paddy field direct seeding machines.

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 inclination detection structure for a paddy field working machine according to the present invention, and Fig. 1 is an overall perspective view of the ground sensor and inclination detection mechanism, etc., and Fig. 2 shows the seedling planting device on the right side when facing the direction of movement. Figure 3 is a side view showing the movement of the arm when the entire seedling planting device is displaced downward, and Figure 4 is a side view of the entire seedling planting device. be. (6a), (6b)... Ground sensor, (
7), (8)...Crankshaft, (7a),
(8a)...Crank arm, (15)...
...Support bracket.

Claims (1)

[Claims] A pair of ground sensors (6a), (6
b) are placed on the left and right sides of the aircraft, and a pair of crankshafts (7), (
8) is rotatably supported in the left-right direction of the aircraft via a support bracket (15), and the support bracket (15)
), extend the crank arms (7a), (8a) from the crankshafts (7), (8) on the inside of the machine, and connect the crank arms (7a), (8a) and the ground sensor (6a).
, (6b) to connect the left and right ground sensors (6a).
, (6b) are linked so that the vertical motion of the crankshafts (7) and (8) is converted into rotational motion and transmitted to the tilt detection mechanism.