JPS6131967B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a horizontal holding mechanism for a planting section in a riding rice transplanter.

[Conventional technology]

In a riding rice transplanter, the planting machine is connected to the traveling vehicle via a lift mechanism so that it can move up and down, and the unevenness of the tiller causes the traveling vehicle to move up and down, increasing the ground pressure of the float of the planting machine. When this changes, the lift mechanism is appropriately rotated by the action of the hydraulic cylinder to keep the ground pressure of the planting work machine constant and keep the height of the planting part constant. However, even if the ground pressure of the float is constant, there is a problem in that the float and the planting section tilt as the traveling vehicle tilts back and forth, so it is necessary to maintain the float in a horizontal state.

[Purpose of the invention]

The object of the present invention is to arrange a ground pressure sensing plate on the lower surface of the center float of a planting work machine, and maintain a constant ground pressure of the center float by the vertical movement of the plate, and to prevent the vertical movement of the tip of the center float. Accordingly, it is an object of the present invention to provide a mechanism that rotates a rolling boss complete included in a lift mechanism and holds a center float and a planting part horizontally.

〔Example〕

The present invention will be explained below with reference to an illustrated embodiment.

In FIG. 1, a planting machine 3 is connected to the rear of the vehicle 1 via a lift mechanism 2 so as to be movable up and down, and one end of the lift mechanism 2 is pivotally connected to the rear of the vehicle 1. It is composed of an upper link 4, a lower link 5, and a rolling boss complete 6 that constitutes the other end of these. The base of the rolling boss complete 6 is pivotally connected to the lower link 5 by a shaft 7, and the upper end is slidably mounted in a long hole 4a provided in the upper link 4 by a shaft 8. A first cylinder 9 whose base is pivotally connected to a stationary member rotates the lift mechanism 2, and the free end of its piston 11 is connected to the free end of a short arm 12 that is substantially integral with the upper link 4. It is connected. A second cylinder 13 for holding the planted portion horizontally is fixed to the upper link 4, and the end of the piston 14 is pivotally connected to the rolling boss complete 6. rolling boss complete 6
A rolling shaft 15 for connecting the planting machine 3 is pivotally attached to the rolling boss complete 6.
When it rotates around the shaft 7, it rotates integrally with it in the same direction. At the bottom of the planting machine 3,
Center float 1 in the center as shown in Figure 2
6 and side floats 17 on both sides thereof are connected to each other.

In FIG. 3, the support column 18 fixed to the rear of the center float 16 is the main body 3a of the planting machine 3.
The tip end 16a of the center float 16 is connected to the main body 3a by a telescoping mechanism 19. A horizontal holding valve 22 for actuating the second cylinder 13 is disposed between a lever 21 pivotally attached to the main body 3a and a tip end 16a of the center float 16. A free end portion of the ground pressure sensing plate 23 whose base portion is pivotally connected to the main body 3a is arranged at a distance from the lower surface portion of the center float 16.
A ground pressure sensing valve 24 for operating the first cylinder 9 is connected via a connecting rod 25 between the free end of the ground pressure sensing plate 23 and the main body 3a. A plurality of planting bodies 26 are arranged on the main body 3a, and the ground pressure sensing plate 23 and the lever 21 are connected by a sensing spring 27.

When the traveling vehicle 1 swings back and forth due to the unevenness of the tiller and the orientation angle of the tip 16a of the center float 16 changes, the horizontal holding valve 22 moves from the neutral position shown in FIG. 4 to either the left or the right. position 22a,
22b. For example, the center float tip 16a rises, the horizontal holding valve 22 switches to position 22a, the piston 14 of the second cylinder 13 advances in the direction of arrow A, and the rolling boss complete 6 and rolling shaft 15 move to the first position.
By rotating counterclockwise in the figure, the center float 16 and the planting body 26 are held horizontally, and when the center float tip 16a is lowered, the planting body 26 is held by the opposite action to the above. level is maintained. Further, when the traveling vehicle 1 itself moves up and down and the ground pressure of the center float 16 changes, the ground pressure sensing valve 24 is switched to the position 24a or 24b by the rotation of the ground pressure sensing plate 23, and the first cylinder 9 By moving the piston 11 back and forth and rotating the lift mechanism 2, the ground pressure of the center float 16 is kept constant, that is, the height of the planting body 26 is kept constant. The ground pressure sensing valve 24 is connected so that it is sensed when the horizontal holding valve 22 is in the neutral position, that is, after the center float 16 is held horizontally, as shown in FIG. The ground pressure can be sensed accurately.

〔Effect of the invention〕

As explained above, according to the present invention, a ground pressure sensing plate is arranged on the lower surface of the center float to switch the ground pressure sensing valve, and a horizontal holding valve is arranged at the tip of the center float, whereby the tilting of the center float By switching this, the planting section can be maintained at a constant height and in a horizontal state.

[Brief explanation of the drawing]

Fig. 1 is a side view of a planting section horizontal holding mechanism showing an embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a side view of a planting machine, and Fig. 4 is a mechanism of the present invention. It is a hydraulic circuit diagram used for. 1... Travel vehicle, 2... Lift mechanism, 3... Planting work machine, 4... Upper link, 5... Lower link, 6...
...Rolling boss complete, 7, 8...axis,
9...First cylinder, 11...Piston, 12
... Short arm, 13 ... Second cylinder, 14 ... Piston, 15 ... Rolling axis, 16 ... Center float, 17 ... Side float, 18 ...
Strut, 21... Lever, 22... Horizontal holding valve, 23... Ground pressure sensing plate, 24... Ground pressure sensing valve, 25... Connecting rod, 26... Planting body.

Claims (1)

[Claims] 1. A lift mechanism that connects the planting machine to the traveling vehicle in a vertically movable manner and rotates with a first cylinder, and a vertical link that constitutes this lift mechanism and has one end pivotally connected to the traveling vehicle. and a rolling boss complete whose base is pivotally attached to the lower link and whose upper part is slidably attached to the upper link, and which rotates together with the low link shaft for connecting the planting machine by the action of the second cylinder. In a riding type rice transplanter, the horizontal holding device is provided between the main body of the planting machine and the tip of its center float, and switches when the center float tilts to operate a second cylinder to hold the center float horizontally. The valve, a ground pressure sensing plate whose base is pivotally connected to the main body of the planting work machine and whose free end is disposed on the lower surface side of the center float, and which is switched by the vertical movement of the sensing plate to control the first cylinder. A horizontal holding mechanism for the planting part of a riding rice transplanter, which consists of a ground pressure sensing valve that is activated to maintain the ground pressure of the sensor float at a constant level.