JPH0724974Y2 - Front / rear posture control device for working unit in paddy work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a front-back posture control device for a working unit of a paddy working machine such as a rice transplanter, a fertilizer applicator, and a seeder.

[Problems to be Solved by Prior Art and Invention] Generally, in this kind of paddy working machine, a working unit is attached to a traveling machine body through a parallel link mechanism so as to be vertically movable as in a riding type rice transplanter. There is.

However, this is due to the consumption of planted seedlings placed on the seedling mounting table and seeds placed in the seed tank as the work progresses, such as the planting section and the sowing section, or the lifting of the working section for the purpose of traveling around the machine. Therefore, the weight of the working unit changes. And when the weight of the working part becomes heavy,
The traveling machine body receives the weight and inclines back and forth so that the front side floats up. Then, the working part becomes in a posture in which the rear part side is depressed, and the working accuracy deteriorates.

[Means for Solving Problems] In view of the above circumstances, the present invention was devised with the object of providing a front / rear posture control device for a working unit in a paddy working machine that can eliminate these drawbacks. In a paddy working machine in which a working unit is attached to a traveling machine body so as to be able to move up and down by an elevating link mechanism, a working unit longitudinal tilting mechanism is provided so that the working unit can be tilted back and forth with respect to the traveling machine body. While being attached to the lifting / lowering link mechanism via the moving body, the body tilting mechanism is operated between the traveling body and the lifting / lowering link mechanism and operates according to the amount of forward / backward tilt change relative to the lifting / lowering link mechanism in the front-rear direction. And the attitude control of the machine body tilting motion mechanism and the working unit front-back tilting mechanism so as to correct the front-back posture of the working unit with respect to the traveling machine body in accordance with the amount of change in the forward-backward tilting of the traveling machine body. The feature is that they are interlockedly connected via a connecting mechanism.

Further, according to the present invention, when the traveling machine body tilts back and forth due to a change in the weight of the working unit, the front and rear postures of the working unit can be automatically corrected and controlled accordingly, and the working accuracy can be improved. It is intended to measure the improvement of.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a riding type traveling machine for traveling in paddy fields, and a planting portion 2 is attached to the rear part of the traveling machine body 1 so as to be vertically movable through an elevating link mechanism 3 composed of parallel links. . That is, the link frame 4 on the traveling body 1 side
The upper ends of the upper links 3a and the lower links 3b are pivotally connected to each other in a vertically swingable manner, and the link holder 5 on the side of the planting portion 2 has a spindle 3d provided at the rear ends of the upper links 3a and the lower links 3b. , 5b are pivotally pivoted up and down, but in this case, the support shaft 3d on the upper link 3a side is formed in the upper end portion of the link holder 5 into a long hole-shaped interchange hole 5a oriented in the front-rear direction. It is provided so as to be movable back and forth, whereby the link holder 5 is configured such that the upper link side support shaft 3d can swing back and forth within the interchange hole 5a with the lower link side support shaft 5b as a fulcrum. Thus, the planting part 2 is attached to the traveling machine body 1 so that its front-back posture can be tilted forward and backward with respect to the traveling machine body 1, and in this manner, the forward-backward tilting mechanism for attaching the planting part 2 to the elevating link mechanism 3. Is configured.

Further, the rear end of the connecting rod 6 is connected to the upper portion of the link holder 5 above the interchange hole 5a, and the front end of the connecting rod 6 is intermediate in the middle of the upper link 3a with the support shaft 7a as a fulcrum. Link rod 7 whose part is mounted so that it can swing back and forth
Is linked to the upper end 7b of the. On the other hand, a base end portion of a cylinder 8 for raising and lowering a planting portion is pivotally attached to the machine body frame 1a of the traveling machine body 1. The cylinder rod 8a of the cylinder body 8a is attached to a bracket 3c hung from the upper link 3a via a pin shaft 10a. The support 10 rotatably attached penetrates through the support 10 so as to advance and retreat in the front-rear direction, and the front end of the rod is in contact with the lower end 7c of the link rod 7. Further, the cylinder rod 8a is provided with a bullet 9 whose front end is supported by a bullet receiver 8b and whose rear end is supported by a support body 10.
The support body 10 which receives the urging force from the ammunition 9 is received by the longitudinal movement of the cylinder 8 with respect to the cylinder 8. In this way, the machine body tilting movement mechanism is configured, and the machine body tilting movement mechanism is the forward and backward tilting mechanism. They are linked together.

In the figure, 11 is a front and rear low seedling mounting table provided in the planting section 2, 12 is a front wheel of the traveling machine body 1, and 13 is a rear wheel.

In the embodiment of the present invention configured as described above, the vertical movement of the planting portion 2 is performed by the vertical movement mechanism 3 associated with the expansion and contraction of the cylinder 8.
The vertical movement of the link frame 4 is used as a reference, but the link holder 5 receives the weight of the planting portion 2 during the planting work in which the planting portion 2 is lowered. 3d is in the posture of being located on the rear end side of the interchange hole 5a. In this case, when a large amount of planting seedlings are placed on the seedling placing table 11 and the planting section 2 side is heavy,
Due to the weight, the traveling vehicle body 1 tilts back and forth with the front wheel 12 side lifted, and the upper link 3a that receives the heavy planting portion 2 tries to move downward. Then, the bracket
3c relatively moves forward to push the support 10 forward against the ammunition 9, and the cylinder rod 8a moves to the lower end of the link rod.
7c is pushed rearward, whereby the connecting rod 6 is displaced to the front side, so that the link holder 5 is accommodated in the through hole.
To swing forward by the amount accommodated by 5a,
The front-back posture of the planting part 2 is automatically corrected so that the front side of the traveling body 1 is lowered.

As described above, in the embodiment of the present invention, when the traveling machine body 1 is in a tilted posture of front high and low due to the weight of the planting part 2, the planting part 2 is lowered frontward on the contrary. As the relative front and rear posture is corrected, the posture of the planting part 2 with respect to the rice field is corrected. Then, when the planting seedlings are consumed and the planting section 2 becomes lighter and the front and upper parts of the traveling machine body 1 are eliminated, this time, on the contrary, the bracket 3c moves backward, and along with this, the traveling machine body of the planting machine section 2 is moved. The front-rear posture with respect to 1 also approaches a horizontal state, whereby the front-rear posture of the planting section 2 with respect to the rice field is changed to the rice field without being affected by the longitudinal inclination of the traveling body 1 based on the weight change on the planting section 2 side. On the other hand, it is possible to maintain a substantially constant front-rear posture and prevent the planting accuracy from being impaired.

On the other hand, when the cylinder 8 is greatly extended and the planting part 2 is lifted from the paddy field for the purpose of traveling around the airframe, the entire weight of the planting part 2 is received by the cylinder 8 via the ammunition 9, At this time as well, the ammunition 9 is contracted, and as described above, the front-back posture of the planting portion 2 with respect to the traveling machine body 1 is corrected to the forward descending shape. As a result, the front and back low seedling mounts 11
Since the inclination angle of the seedling is gentle, it is possible to effectively prevent the planting seedling from buckling.

[Effects] In summary, since the present invention is constructed as described above, when the working unit side is heavy and the traveling machine body is in the forward rising state and the lifting link mechanism is lowered, the ammunition is lowered. When a load is applied, the working unit is corrected to the front-lowering posture by the pressing operation of the tilting movement mechanism by the rod body that protrudes as it descends. Even if the traveling weight is heavy and the traveling machine body is in the forward rising state, it is automatically corrected to the frontward lowering posture to eliminate this, and it is possible to prevent the working posture for the field scene from being impaired.

[Brief description of drawings]

FIG. 1 shows an embodiment of a front-back posture control device for a working part of a paddy working machine according to the present invention. FIG. 1 is an overall side view of a riding-type rice transplanter, and FIG. Figure,
FIG. 3 is a partially cutaway enlarged plan view of a main part. In the figure, 1 is a traveling machine body, 2 is a planting part, 3 is a parallel link mechanism, 5 is a link holder, 8 is a cylinder, 9 is a bullet, and 10 is a support.

Claims (1)

[Scope of utility model registration request] 1. A paddy working machine in which a working unit is attached to a traveling machine body so as to be able to move up and down by an elevating link mechanism, and the working unit is tilted forward and backward with respect to the traveling machine body. While being attached to the lifting link mechanism via the mechanism, between the traveling machine body and the lifting link mechanism,
A machine body tilting motion mechanism that operates in accordance with a front-back tilting change amount in which the machine body tilts relative to the lifting link mechanism in the front-rear direction is provided, and the machine body tilting motion mechanism and the working unit front-back tilting mechanism are provided in the travel machine body. A front-rear posture control device for a working unit in a paddy working machine, characterized in that the front-rear posture of the working unit is interlocked and coupled so as to correct the front-rear posture of the working unit according to the amount of change in the front-back tilt of the working unit.