JPH058801Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a device for leveling the finish of the ridges by installing a ridge shaper or the like to the rear of a rotary tiller.

(b) Prior art Conventionally, a configuration in which a ridge former is attached to the rear of a rotary tillage device has been disclosed in Japanese Unexamined Patent Publication No. 56-23801, Japanese Utility Model Publication No. 61-5042, and Japanese Utility Model Publication No. 178802/1983.
The technology disclosed in the above publication is considered to be publicly known.

Furthermore, regarding the configuration for detecting the rotation of the depth beam and controlling the elevation of the rotary tilling device, techniques such as Japanese Patent Application Laid-Open No. 61-88803 and Japanese Utility Model Application No. 61-47214 are known. .

(c) Problems that the invention aims to solve However, with the technology in which the ridge forming device is fixed to the rotary tilling device, the leveling plate of the ridge forming device also needs to be adjusted as the rotary tilling device moves up and down when working in uneven fields. As the plants were moved up and down, the ridges also became uneven, resulting in a very poor finish and making subsequent planting and transplanting difficult.

(d) Means for solving the problem In view of the above points, the present invention is constructed as follows.

A spring 19 is interposed between a depth beam 9 that is pivotally supported on the gear box 2 of the rotary tillage device R and projects rearward, and a top link mast 7 that projects and is fixed above the gear box 2. In a configuration in which the ridge forming device A is fixedly installed and the ridge forming device A is movable up and down with respect to the tilling claws 5, a sensor 15 is interposed to detect a change in the distance between the depth beam 9 and the tilling claws 5. The hydraulic control device of the tractor T is controlled by the signal from the sensor 15, and the entire rotary tilling device R is controlled to move up and down.
This is to control the relative position to a constant value.

(E) Embodiments The object of the present invention is as described above, and the configuration of the present invention will be described based on the configuration of the embodiment shown in the attached drawings.

Figure 1 is a side view of the rotary tiller with the ridge former attached, Figure 2 is a plan view, Figure 3 is a rear perspective view showing the working state, and Figure 4 is the rotary tiller with the ridge former removed. FIG. 3 is a rear perspective view of the tilling device.

In Figures 1, 2, and 3, a rotary tiller R is attached to the rear of a tractor T via a work implement attachment device, and the power is transmitted from a universal joint to a PTO shaft protruding from the rear of the transmission case of the tractor T. The input shaft 1 is connected to the universal joint 1 and is transmitted to the input shaft of the gearbox 2 of the rotary tiller R.

A tilling claw 5 is fixed to the tilling claw shaft from the gearbox 2 through the main beam 3 and the chain case 4.
The tiller is cultivated by rotating it.

Flanges 6, 6 are fixedly installed on the main beam 3 on both sides of the gearbox 2, side supports 8, 8 are connected between the front end and the top link mast 7, and a support arm 1 is attached to one rear side of the flanges 6, 6.
0 and 10 are fixedly installed, and a depth beam 9 is pivotally supported on the other side.

An adjustment shaft 11 connected to a rear cover 13 is pivotally supported at the rear end of the support arm 10, and a spring 12 for restoring the rotation of the rear cover 13 is fitted onto the adjustment shaft 11.

In addition, the pipe portion 20a of the π-shaped bracket 20 is fitted into the depth beam 9 at the rear end of the depth beam 9 and fixed with a pin 21, and the longitudinal length can be changed by changing the insertion position of the pin 21. It is.

In order to attach the ridge forming device A to the bracket 20, a guide plate 22 is fixed to the rear side surface of the bracket 20, a notch is formed at the upper end of the guide plate 22, and a mounting frame 34 for the ridge forming device A is inserted into the notch. A locking shaft 30 installed horizontally is locked.

On the other hand, as shown in FIG. 4, a lock device is provided on the rear lower surface of the bracket 20, and a lock lever 25
By rotating the grip 27 of the link 26
Insert and remove the stopper pin through L and 26R, and attach the stopper pin to the mounting frame 34 of the ridge forming device A.
It is configured to be locked by inserting it into the insertion hole.

That is, a locking plate 33 is provided upright at the front part of the mounting frame 34, and a locking shaft 30 is installed at the upper part.
is installed horizontally, and an engagement hole for the stopper pin is bored in the lower part. Numeral 34a is a bolt hole for adjusting the front and back position when fixing the mounting frame 34 to the horizontal rod 35.

The rear end of the mounting frame 34 is bolted to a mounting member 44 fitted into the horizontal rod 35 of the ridge former A, and mounting brackets 36 are attached to the rear from both sides of the mounting member 44.
is fixed on the horizontal rod 35. The mounting bracket 36
A cover 37 is fixed to the lower surface, and a mounting rod 39 is fitted into the pipe portion. A leveling plate 40 is attached to the rear end of the mounting rod 39. Also, horizontal rod 35
Vertical rods 41 are vertically installed at both ends of the engine, and a tail wheel 42 and side molding plates 43 are fixedly installed.

The leveling control device, which is the main part of the present invention, is installed between the frame 9a installed horizontally on the depth beam 9 and the rear end of the top link mast 7 as shown in FIG. An adjustment handle 17 is interposed to adjust the height of the machine.

A spring 19 is fitted into the lower end of the adjustment handle 17 so that it can expand and contract in response to rotation between the rotary tiller and the depth beam 9. Further, an L-shaped sensor support member 14 is fixed to the end of the support arm 10 fixed to the flange 6, and a sensor mounting body 9b is also fixed to the depth beam 9.
A sensor 15 is provided between the sensor support member 14 and the sensor support member 14.
is installed to detect the distance between the rotary tillage device R and the depth beam 9, and sends feedback via a wire 16 to the hydraulic control device for the lift arm of the tractor. That is, the sensor that detects the rotation of the rear cover and provides feedback during plowing depth control is configured to detect the rotation of the depth beam during ridge-raising work.

(f) Effects of the invention In this configuration, the invention exerts the following effects.

That is, when working in a field with unevenness as shown in FIG. The distance between the beam 9 and the support arm 10 is increased, and the adjustment handle 1
The spring 19 inserted into the spring 7 expands, and the amount of change is transmitted from the sensor 15 to the feedback wire 1.
6 to the hydraulic control device.

Then, the valve is switched and the lift arm is rotated in the upward direction to raise the rotary tiller R, and the ridge former A rises to a position where it is balanced with the spring pressure of the spring 19, leaving it at approximately the same position as before. The ridges are formed approximately horizontally.

Conversely, when the rear wheel reaches the convex position and the rotary tiller R rises and the ridge shaper A descends, the distance between the depth beam 9 and the support arm 10 narrows, and the spring 19 fitted into the adjustment handle 17 is compressed. The amount of change is transmitted from the sensor 15 to the hydraulic control device via the feedback wire 16, and the lift arm is rotated in the downward direction to lower the rotary tiller R. The ridge shaper A descends to a position balanced with the spring pressure of the spring 19, and is approximately in the same position as before, so that the ridge is formed generally horizontally.

(g) Effects of the invention With the above configuration, the invention provides the following effects.

That is, since the ridge forming device A is supported in a floating state with respect to the rotary tiller R and the tiller claws 5 via the spring 19, the tractor T
Even when the rotary tillage device R is raised and lowered by the hydraulic control device, even when the tractor T and rotary tillage device R move up and down as a unit due to irregularities in the field, the ridge forming device A does not move up and down directly. , as the vibration of the spring 19 converges with a slight delay, it follows the vertical position of the rotary tiller R.

Therefore, even when the rotary tilling device R is raised or lowered by the hydraulic control device of the tractor T, the ridge forming device A follows with a delay, making it possible to form nearly horizontal ridges, resulting in ridges with a beautiful appearance. I was able to do that.

[Brief explanation of the drawing]

Figure 1 is a side view of the rotary tiller with the ridge former attached, Figure 2 is a plan view, Figure 3 is a rear perspective view showing the working state, and Figure 4 is the rotary tiller with the ridge former removed. Rear perspective view of tillage device, No. 5
The figure is an overall side view showing the working state when the control device of the present invention is installed on an agricultural tractor. A...ridge former, R...rotary tillage device,
3... Main beam, 7... Main support, 9
...Depth beam, 10...Support arm, 15...
...sensor, 17...adjustment handle, 19...spring.

Claims (1)

[Scope of utility model registration request] A spring 19 is interposed between a depth beam 9 that is pivotally supported on the gear box 2 of the rotary tillage device R and projects rearward, and a top link mast 7 that projects and is fixed above the gear box 2. In a configuration in which the ridge forming device A is fixedly installed and the ridge forming device A is movable up and down with respect to the tilling claws 5, a sensor 15 is interposed to detect a change in the distance between the depth beam 9 and the tilling claws 5. The hydraulic control device of the tractor T is controlled by the signal from the sensor 15, and the entire rotary tilling device R is controlled to move up and down.
A lifting control device for a ridge former, etc., characterized by controlling the relative position of the ridge former to a constant value.