JPH0441770Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a rotary tiller that is connected via a rod to a hydraulic mechanism equipped with a rear cover on the machine side that detects the plowing depth by contacting the field. This invention relates to a plowing depth switching device that can easily and reliably switch to a plowing position and a plowing position.

In rotary tillers, which automatically control the tillage depth by detecting the tillage depth using a tillage depth leveler that detects the tillage depth by contacting the field, the control range of tillage depth varies between tilling and puddling. are very different, so
Normally, the height of the rear cover as a plowing depth leveler is switched to the reference height of the tilling position and plowing position, respectively. However, in the past, this switching of plowing depth was
The fixing position of the rod that connects the rear cover to the hydraulic mechanism installed on the machine side is determined by inserting and removing the connecting pin, so the switching operation is complicated, and it is difficult to cultivate the plow, especially in the field. When switching, there was often a risk of losing the connecting pin, etc.

In view of the above-mentioned actual situation, the present invention aims to eliminate the problems, and the purpose of this invention is to fix the rear cover by locking the locking pin provided on the rod with the position regulating plate provided on the rear cover. A locking portion is provided that defines the height of the plowing position and a plowing position, respectively, and a guide portion that switches and guides the locking pin communicates between the two locking portions, and the locking pin is connected to the locking portion. The height of the rear cover can be changed between the tilling position and the plowing position by pressing the rear cover to the side, so it can be easily and reliably changed to the plowing position and the plowing position without the need to insert or remove connecting pins, etc. The aim is to provide a device that can change the plowing depth for each.

The structure of the present invention will be described with reference to an embodiment shown in the drawings. 1 is a tractor, 2 is a rotary tiller, and the rotary tiller 2 is a rotary tiller.
is attached to the rear of the tractor 1 by means of a top link 3 and left and right lower links 4 so as to be movable up and down. 5 is a lift arm, 6 is a lift rod, and the rotary tilling machine 2 is controlled to rise and fall by a hydraulic mechanism on the machine side that moves the lift rod 6 up and down. 7 is a rotary tilling section, 8 is a tilling section cover, and 9 is a rear cover.
0, and the rear cover 9 is in contact with the field and forms a part of the plowing depth leveler 11. The tillage depth leveler 11 has a sensor arm 12 that is rotated by the vertical movement of the rear cover 9, and the sensor arm 12 is connected to the hydraulic mechanism of the tractor 1 by a connecting wire 13. A plowing depth switching operation mechanism 16 is interposed between the stay 14 and the rod 15 connected to the sensor arm 12. That is, the tillage depth switching operation mechanism 16 is composed of a position regulating plate 17 fixed to the stay 14, a locking pin 18 fixed to the tip of the rod 15, a stopper 19, etc. 17 is formed with locking portions A and B that define the locking pin 18 in the plowing position and the plowing position. Between the locking portions A and B, a guide portion for switching and guiding the locking pin position 8 is formed by a substantially U-shaped guide groove 20.
The locking pin 18 is engaged with this guide groove 20 and is movable. 21 is a lock nut that adjusts the rod length; 22 is a compression bullet;
and the position regulating plate 17. The stopper 19 is for immovably locking the locking pin 18 in either the locking portion A at the plowing position or the locking portion B at the puddling position.
9 is biased by a tension bomb 23 in a direction to press the locking pin 18 toward the locking portions A and B.

In the structure constructed as described above, when performing plowing work, the locking pin 18 of the rod 15 is positioned at the locking part A provided on the position regulating plate 17, and when performing plowing work, the locking pin 18 of the rod 15 is positioned at the locking part A provided on the position regulating plate 17. When the rear cover 9 is positioned at the locking part B, the rear cover 9 is set to the respective standard height, and the depth of tilling by the rotary tiller 7 is adjusted by the hydraulic mechanism on the tractor 1 side. Automatically controlled within a certain range.

By the way, when switching between the plowing work and the puddling work, if the stopper 19 is rotated against the tensioning machine 23, the locking pin 18 is guided by the guide groove 20 and locks into the locking portion A or the locking portion. B, the operation can be performed easily, and when the stopper 19 is released, the locking pin 18 can be moved to either the locking part A at the plowing position or the locking part B at the plowing position. It is locked in an immobile state. For this reason, the locking pin 18 will never move carelessly during work, and a stable state can be maintained.

In short, the present invention is a rotary tiller in which a rear cover that contacts the field surface and detects tillage depth is connected to a hydraulic mechanism provided on the machine side via a rod, and a position regulating plate provided on the rear cover. A locking portion is provided in which the locking pin provided on the rod locks and defines the height of the rear cover at the plowing position and the plowing position, and the locking pin is switched and guided between the two locking portions. Since the height of the rear cover is configured to be switchable between the tilling position and the plowing position by communicating through the guide part and pressing the locking pin toward the locking part, the plowing depth position can be changed. In this case, it is only necessary to switch the locking pin provided on the rod to the locking part provided on the position regulating plate and lock it, and there is no need to insert or remove the connecting pin etc. as with conventional ones, and it can be done with one touch operation. This provides an extremely useful practical effect in that the plowing depth can be easily and reliably switched between the plowing position and the plowing position.

[Brief explanation of the drawing]

The drawings show an embodiment of the tilling depth switching device for a rotary tiller according to the present invention, in which Fig. 1 is a side view showing the rotary tiller mounted on a tractor, and Fig. 2 is the same as above. Part of the side view, FIG. 3 is a side view of the main part thereof. In the figure, 1 is a tractor, 2 is a rotary tiller, 9 is a rear cover, 12 is a sensor arm, 1
5 is a rod, 17 is a position regulating plate, 18 is a locking pin, 19 is a stopper, 20 is a guide groove, A is a locking portion at the plowing position, and B is a locking portion at the puddling position.

Claims (1)

[Scope of utility model registration request] A rear cover that touches the field and detects plowing depth.
In a rotary tiller that is connected via a rod to a hydraulic mechanism installed on the machine side, a locking pin installed on the rod locks into the position regulating plate installed on the rear cover to adjust the height of the rear cover to the tilling position. A locking portion is provided at each of the and puddling positions, and the locking portions are connected by a guide portion that switches and guides the locking pin, and the locking pin is pressed and biased toward the locking portion. A tillage depth switching device for a rotary tiller, characterized in that the height of the rear cover can be switched between a tilling position and a plowing position.