JPH0458283B2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention can be 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) Prior art The technology for making the tilling cover of a rotary tilling device rotatable back and forth around the tilling claws in order to change the cover depending on the type of work or field conditions is well known. be. For example, special public service in Showa 53
This is similar to the technology described in Publication No.-27165.

However, in the case of a conventional rotary tilling device with a rotatable tilling cover, the tilling cover is simply rotated to maintain a constant relationship between the tilling cover and the tilling claws relative to the top and bottom of the rotary tilling device. A configuration in which the distance between the tips of the tilling claws and the inner surface of the tilling cover is changed as the tilling depth of the tilling device changes, and the rotational resistance of the tilling claws is made constant even when the tilling depth increases has been successfully achieved. It had not been done.

(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 claws can always be kept constant, and the shallow tilling depth of the rotary tilling device allows the tip of the tilling claws and the inside of the tilling cover to be By changing the distance to the edge, when the tilling depth is large, the gap is increased to reduce the rotational resistance of the tilling claws, and when the tilling depth is shallow, even if the rotational resistance is large, the digging depth of the tilling claws can be reduced. Since the depth is shallow, it can withstand sufficient resistance, so the gap between the tilling claw and the tilling cover is made small so that the rotational resistance of the tilling claw is always constant.

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

In the case where the tilling cover is rotatable around the tilling claw shaft, the rotation center 01 of the tilling cover and the tilling claw shaft center 02 are made eccentric, and the gap between the toe of the tilling claw and the tilling cover is adjusted in the direction of discharging the tilled soil. It is designed to become larger towards the future.

Further, the tilling cover is configured to be rotatable with respect to the main beam, and the sliding support portion of the tilling cover and the main beam is configured by rolling elements.

Further, an adjustment rod is provided between the tilling cover and the working machine frame side to rotate the tilling cover by pushing and pulling operations.

(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 in a normal plowing state, and Fig. 3 is a side view in a plowing state with a deep plowing depth. Fig. 4 is a plan view of the main beam and tilling cover separated, Fig. 5 is a rear sectional view of the main beam and rolling element, and Fig. 6 is an adjustment rod for adjusting the rotational position of the tilling cover. 7 is a rear view, FIG. 8 is a sectional plan view of the adjusting rod in the locked state, FIG. 9 is a sectional plan view of the adjusting rod in the released state, and FIG. 10 is a side sectional view of the adjusting rod. be.

The overall structure of the rotary tiller of the present invention will be explained with reference to FIGS. 1, 2, 3, and 4.

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 pivotally supports the rear cover 13. In most rotary tillers commonly used in the past, the tiller cover 1 is fixed to the main beam 6 and cannot be rotated.

When the rotary tillage device is raised and lowered by the hydraulic system of the agricultural tractor, the rotary tillage device is not completely translated in parallel and raised and lowered, but is moved around the tips of the lower link and top link of the tractor. Since the tilling cover 1 is rotated up and down, the position of the tilling cover 1 changes back and forth with respect to the tilling claws 14. In order to improve this point, the present invention is configured so that the tilling cover 1 can be rotated and adjusted with respect to the main beam 6.
The structure for rotatably supporting the tilling cover 1 includes a support bracket 5 for the rolling elements 2 protruding below a main beam 6 protruding left and right from a rotary gear box 16, and a support bracket 5 for the rolling elements 2 being provided at the front and rear lower ends of the support bracket 5. A rotatably supported rolling element 2 is fixed to the surface of a tilling cover 1, and is supported by being fitted into a guide rail 3 having a C-shaped cross section. Rolling element 2
There are two sets in the front and back, and one pair on the left and right. Similarly, guide rail 3 is also tilling cover 1.
They are placed on the left and right of the .

A depth control bar 11 is protruded from the pivot point at the rear end of the rotary gear box 16.
A rear cover 13 is attached to 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 will not immediately be rotated up and down as a result of this. However, if the tillage cover 1 is rotated too much, the buffer spring 31
Since this exceeds the absorption range, rotate the depth handle 10 and adjust the depth control bar 11.
It is necessary to adjust the height of the rear cover 13 so that the rear cover 13 has an appropriate height.

The depth handle 10 is supported by a handle bracket 22 protruding from a top link mast 17 constituting the working machine frame, and the top link mast 17 is provided with a rotatable tilling cover 1. This is because the adjusting rod 7, which locks at an appropriate rotational position, is supported. 21 is an input shaft that transmits power into the rotary gear box 16.

In the overall configuration as described above, the present invention sets the rotation center of the tilling cover at 01 and the tilling claw shaft center at 02, whereas in the conventional technology, both are the same. Centers 01 and 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 made of hatchet claws, and are 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. a is the radius of the circular arc of the tilling cover, and b is the rotation radius of the tilling claw shaft.

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. The gap c1 when the plowing depth is shallow is the smallest, followed by the gap c2 when the plowing depth is normal, and finally the gap c3 when the plowing depth is deep. The rotational resistance of 14 can be reduced in deep plowing. In FIG. 5, the structure of the tilling cover 1 and the rolling element 2 is shown, and the rolling element 2 is 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. In addition, the rotary gear box 16 of the tilling cover 1
On the side, a long hole 1a is opened in the tillage cover 1 in the front and back, and a synthetic resin guide pin 32 is fitted into the long hole 1a. It supports the rotation of the tilling cover 1 and enables free movement. Next, the structure of the adjustment rod 7 that rotates and locks the tilling cover 1 will be explained using the configurations shown in FIGS. 6 to 10.

The adjustment rod 7 is interposed between the left and right top link masts 17 that constitute the fuselage frame. That is, the adjustment rod 7 is vertically slidably inserted into a sliding hole formed in a rotation pin 18 supported by the left and right top link masts 17. The pivot pin 18 is capable of pivoting back and forth.

A rotation adjustment handle 20 is fixed to the upper end of the adjustment rod 7, and a ball joint 2 is attached to the lower end.
7 is fixed. The shaft of the tillage cover 1 is fitted into the lower end of the ball joint 27,
Through the ball joint 27, the rotation adjustment handle 20 and the adjustment rod 7 can be rotated left and right. Further, a locking rod 8 is fixedly installed parallel to the adjustment rod 7, and a locking groove 8a provided in the locking rod 8 engages with a locking metal fitting 19 provided protruding from the top link mast 17 side. The adjustment rod 7 is stopped from moving. Rotate the rotation adjustment handle 20 to fit the locking groove 8a of the locking rod 8 into the locking fitting 19.
When released, the adjustment rod 7 becomes able to slide up and down, and the tilling cover 1 can be adjusted. A biasing spring 3 is provided between the top link mast 17 and the adjustment rod 7, which always biases the locking rod 8 toward the locking metal fitting 19.
5 is interposed, and is biased by a spring to prevent the locking rod 8 and the locking groove 8a of the locking fitting 19 from coming off due to vibrations of a tractor or rotary tiller.

(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.

Secondly, the rotation center 01 of the tilling cover and the center 02 of the tilling claw shaft are made eccentric, and the gap between the toe of the tilling claw and the tilling cover is configured to become larger in the direction of discharging the tilled soil. By increasing the gap on the discharge side of tilled soil, the soil discharge resistance can be reduced.

In addition, when the rotary tiller moves up and down to adjust the tillage depth, the tilling cover moves tilling claw 1 accordingly.
4, by rotating so that the tilling claws 14 are always in a fixed position, the gap between the tilling cover 1 and the tilling claws 14 can be made large for deep tilling and small for shallow tilling. This makes it possible to keep the rotational resistance constant and prevent the deterioration of the soil crushing effect.

Thirdly, since the sliding support part of the tilling cover and the main beam is constructed with rolling elements, the operating force when the tilling cover 1 rotates can be reduced, and the tilling cover 1 can be stabilized at the locked position. I was able to obtain this.

Fourthly, since an adjustment rod is provided between the tilling cover and the work equipment frame side to rotate the tilling cover by pushing and pulling, the rotating direction of the tilling cover 1 and the moving direction of the adjusting rod 7 are the same. Therefore, the operator can adjust the rotation of the tilling cover 1 by moving the adjustment rod 7 back and forth, thereby reducing the operating force.

[Brief explanation of the drawing]

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 in a normal plowing state, and Fig. 3 is a side view in a plowing state with a deep plowing depth. Figure 4 is a plan view of the main beam and tilling cover separated, Figure 5 is a rear sectional view of the main beam and rolling element, and Figure 6 is a diagram of the adjusting rod for the rotational position of the tilling cover. 7 is a rear view, FIG. 8 is a sectional plan view of the adjusting rod in the locked state, FIG. 9 is a sectional plan view of the adjusting rod in the released state, and FIG. 10 is a side sectional view of the adjusting rod. be. 1... Tilling cover, 2... Rolling element, 3... Guide rail, 5... Support bracket, 6... Main beam, 7... Adjusting rod, 8... Locking rod, 14...
Cultivating claw, 17... Totsu prink mast, 01...
Center of rotation of the tilling cover, 02... center of the tilling claw shaft.

Claims (1)

[Scope of Claims] 1. In a structure in which the tilling cover is rotatable around the tilling claw shaft, the rotation center 01 of the tilling cover and the tilling claw shaft center 02 are made eccentric, and the tip of the tilling claw and the tilling cover are made eccentric. A rotary tillage device characterized in that the gap between the tillers increases in the direction in which tilled soil is discharged. 2. A rotary tillage device characterized in that the tillage cover according to claim 1 is configured to be rotatable with respect to the main beam, and the sliding support portion of the tillage cover and the main beam is configured by a rolling element. 3. A tillage cover as set forth in claim 1,
A rotary tilling device characterized in that an adjustment rod is provided between the working machine frame side and the tilling cover is rotated by a push/pull operation.