JPH051681B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is attached to the rear of an agricultural tractor, etc.,
The present invention relates to a rotary tilling device for cultivating a field, in which a tilling cover is configured to be rotatable.

(b) Conventional technology Traditionally, tillage covers of rotary tillers have been
Techniques are known in which the tiller can be rotated back and forth around the tiller to change it depending on the type of work or field conditions. For example, special public service in 1977-
This is similar to the technology described in Publication No. 27165.

However, in the case of conventional rotary tillers in which the tiller cover is rotatable, in order to maintain a constant relationship between the tiller cover and tiller claws with respect to the top and bottom of the rotary tiller, the rotary tillers are rotated as the rotary tiller goes up and down. Therefore, the tillage cover is only rotated mechanically by a link device, and a link device must be interposed between the rotary tiller and the tractor, and the link and the lifting and lowering of the rotary tiller must be interlocked. Since the tilling cover is automatically rotated, the position of the tilling cover is approximately controlled, and it is not possible to always maintain a constant angle with respect to the field.

(c) Problems to be solved by the invention The present invention solves the problem by raising and lowering the rotary tiller.
The tilling cover is configured to be rotatable so that the relative position between the tilling cover and the tilling claw can always be kept constant, and the rotating position of the tilling cover 1 is always detected by an angle sensor and set by the operator. The rotating hydraulic cylinder is automatically controlled to expand and contract so that the tillage cover is focused at the same angle as the horizontal plane.

(d) Means for Solving the Problems The objects of the present invention are as described above. Next, the configuration for achieving the objects will be explained.

In a configuration in which the tilling cover can be rotated around the tilling claw axis, a hydraulic cylinder for rotation is interposed between the tilling cover and the work machine frame, and an angle sensor is attached to the side that rotates back and forth. The rotational position of the tilling cover is detected by the angle sensor, and the rotating hydraulic cylinder is expanded and contracted to control the tilling cover to be maintained in a horizontal position or at an arbitrary angle.

(d) Means for Solving the Problems The purpose and structure of the present invention are as described above. Next, the structure of the embodiment shown in the attached drawings and the effects of the invention will be explained.

Fig. 1 is a side view showing the rotary tilling device of the present invention in a plowing operation with a shallow plowing depth, Fig. 2 is a side view of the rotary tiller in a plowing state with a deep plowing depth, and Fig. 3 is a side view of the rotary tiller of the present invention in a plowing state with a shallow plowing depth. FIG. 5 is a block diagram of the automatic tilling cover rotation control device of the present invention.

The overall configuration of the rotary tiller of the present invention will be explained with reference to FIGS. 1, 2, and 3.

The rotary tilling device of the present invention is structured mainly around the rotary gearbox 16, as in the prior art. The rotary gearbox 16
The tilling case 15 protrudes downward, and the tilling claw shaft 30 protrudes from the tilling case 15 to the left and right. In this embodiment, a center drive type rotary tiller is disclosed in which the tiller case 15 is provided directly below the rotary gear box 16, but at the outer end of the main beam 6,
A side drive type rotary tiller with a vertical tiller case may also be used.

The tilling case 15 is provided with a claw seat, and the tilling claw 14 is planted in the claw seat.

The tilling cover 1, which is a main part of the present invention, covers the outer periphery of the rotation locus of the rotating tilling claws 14, prevents the tilled soil from scattering, holds the soil between the tilling claws 14, and crushes the soil. The front end is open and the rear end pivots around the rear cover 13. In most of the rotary tillage devices commonly used in the past, the tillage cover 1 has a main beam 6.
It is fixed and cannot be rotated.

When the rotary tiller is raised and lowered by the tractor's hydraulic system, the rotary tiller is not moved up and down completely in parallel, but rotates around the tips of the lower link and top link of the tractor. Since it is a dynamic elevation, tilling claw 1
4, the tilling cover 1 changes its position back and forth. In the present invention, in order to improve this point, the tilling cover 1 is configured to be rotatable and adjustable with respect to the main beam 6.

The tilling cover 1 is rotatably supported by a support bracket 5 of the rolling element 2 that protrudes below a main beam 6 that protrudes left and right from a rotary gear box 16, and is rotatable at the front and rear lower ends of the support bracket 5. The rolling elements 2 supported by the tiller are fixed on the surface of the tilling cover 1, and are supported by being fitted into a guide rail 3 having a C-shaped cross section. Two sets of rolling elements 2 are provided at the front and rear, and one pair at the left and right. Similarly, guide rails 3 are also arranged on the left and right sides of the tilling cover 1.

A depth control bar 11 is bored in the pivot portion at the rear end of the rotary gear box 16, and a linear cover 13 is provided on the depth control bar 11.
A hanger rod 12 is suspended via a buffer spring 31. Since it is suspended via a buffer spring 31, even if the rear cover 13 rotates back and forth or up and down with the rotation of the tilling cover 1, it is fixed to the rotary gear box 16 and is supported by the depth control bar 11, which does not rotate. rear cover 1
3, but this does not immediately result in vertical rotation. However, if the tillage cover 1 is rotated too much, the absorption range of the buffer spring 31 will be exceeded, so the height of the depth control bar 11 is adjusted by rotating the depth handle 10 and expanding or contracting the adjustment screw part 29. Adjust the height and close the rear cover 13.
It is necessary to adjust the appropriate height.

The depth handle 10 projects and supports a handle bracket 22 from the work machine frame 17, and a rotating hydraulic cylinder 7 is interposed between the work machine frame 17 and the pivot bracket 8 of the tilling cover 1. -ing A hydraulic control valve 18 controls the rotating hydraulic cylinder 7, and the hydraulic control valve 18 is controlled by a control device in a control box based on feedback signals from the angle sensor 9.

In the overall configuration as described above, if the center of rotation of the tilling cover is set to 01 and the center of the tilling claw shaft is set to 02, in the conventional technology, both of the centers are the same, but in this embodiment, these two centers are set to 01. , 02 are configured separately. The eccentric positions are arranged such that they become larger in the direction of discharging the tilled soil.

In the configuration of this embodiment, the tilling claws 14 are rehabilitated by hatchet claws and configured for down-cut tilling, so the direction of rotation of the tilling claws 14 is counterclockwise, and the direction of discharging the tilled soil is also the same. Since the direction of rotation is counterclockwise, the tilling cover is rotated so that the gap m at the rear end of the tilling cover 1 becomes small and the gap n at the front end of the tilling cover 1 corresponding to the soil outlet becomes large in FIG. The rotation center 01 is arranged above and in front of the tilling claw shaft center 02.

By configuring as above, the tillage cover 1
It goes without saying that the gap between the tip of the tilling claw 14 becomes larger in the direction of discharging the tilled soil, but if we compare the gap c at the center position of the front and back of the tilling cover 1, as shown in Fig. 1. When the plowing depth is shallow, the gap c1 is the smallest, and when the plowing depth is deep, it is the gap c2. In some cases, it can be made smaller. In FIG. 3, the configuration of the tilling cover 1 and the rolling elements 2 is shown, and the rolling elements 2 are fitted into the guide rail 3.
In the embodiment, the rolling element 2 is constituted by a resin roller, and a biasing spring 33 within the pivot shaft 4 urges the rolling element 2 to come into close contact with the inner wall of the guide rail 3. Further, on the rotary gear box 16 side of the tillage cover 1, a long hole 1a is opened in the front and back of the tillage cover 1, and a synthetic resin guide pin is fitted into the long hole 1a. A guide pin 32 made of synthetic resin supports one rotation of the tilling cover, allowing free movement.

With the above configuration, the present invention automatically controls the rotation angle of the rotating tillage cover 1, so that even when the rotary tillage device moves up and down to adjust the tillage depth, the tillage cover 1 is always rotated. It is designed to maintain a constant position relative to the field.

The rotational position of the tilling cover 1 is detected by the angle sensor 9 relative to the horizontal plane. The angle sensor 9 is attached to the top surface of the rotating tillage cover 1.

The configuration in which the rotating hydraulic cylinder 7 is expanded and contracted based on the feedback signal from the angle sensor 9 will be explained.

In the block diagram shown in FIG. 4, an angle setting section 26 is provided in a control box C, and a comparison section 23 compares the setting value of the angle setting section 26 and the detected value detected by the angle sensor 9. be. The value calculated by the comparison section 23 is used as a feedback signal via the calculation section 25 to switch the hydraulic control valve 18.

(F) Effects of the Invention Since the present invention is configured as described above, it has the following effects.

First, by making the tilling cover rotatable, the positional relationship between the rear cover and the tilling claws changed due to the vertical movement of the rotary tilling device. By rotating the , the relationship between the tilling claws and the rear cover can always be kept constant, and if the rear cover is also used as a depth control sensor, accurate tilling depth value can always be fed back.

Second, by operating the rotating tillage cover 1 using the rotating hydraulic cylinder 7 interposed between the working machine frame 17 and the pivot bracket,
The operator's operating force can be reduced,
In addition, by automatically controlling the rotational position of the tillage cover 1 using the angle sensor 9 and the hydraulic control valve 18,
The tilling cover 1 can always cover the tilling claws 14 at a fixed position, and the rotary tilling device can have a good soil crushing effect with less scattering of the tilled soil.

Thirdly, the angle sensor 9 attached to the top surface of the tillage cover 1 can also be used as a left-right horizontal control device that horizontally controls the left-right height of the entire rotary tillage device regardless of the tractor's posture. , it is possible to reduce costs.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the rotary tilling device of the present invention in plowing operation with a shallow plowing depth, Fig. 2 is a side view of the plowing state with a deep plowing depth, and Fig. 3 is a main beam and tillage cover. FIG. 4 is a block diagram of the automatic tilling cover rotation control device of the present invention. 1... Tilling cover, 2... Rolling element, 3... Guide rail, 5... Support bracket, 6... Main beam, 7... Hydraulic cylinder for rotation, 8... Pivot bracket, 9... Angle sensor , 14... Tilling claw, 17... Working machine frame, 18... Hydraulic control valve.

Claims (1)

[Claims] 1 In a configuration in which the tilling cover can be rotated around the tilling claw axis, a hydraulic cylinder for rotation is interposed between the tilling cover and the work equipment frame, and an angle sensor is attached to the side that rotates back and forth. A rotary tillage device capable of rotation, characterized in that the angle sensor detects the rotational position of the tillage cover, expands and contracts the rotational hydraulic cylinder, and controls the tillage cover to be maintained in a horizontal position or at an arbitrary angle. Tillage cover.