JPS6287003A - Rotary plow apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a rotary tiller which is attached to the rear of an agricultural tractor or the like and is used to cultivate a field, with a rotatable tiller cover.

(b) The tilling cover of the conventional rotary tilling device is changed around the tilling claws depending on the type of work and field conditions.
Techniques for making it possible to rotate back and forth have been known for a long time. For example, there is a technique described in Japanese Patent Publication No. 53-27165.

However, in the case of a conventional rotary tilling device in which the tilling cover can be rotated, the tilling cover is simply rotated to maintain a constant relationship between the tilling cover and the tilling claws with respect 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 achieved. It had not been done.

(C) Problems to be Solved by the Invention The present invention configures the tilling cover to be rotatable so that the relative position between the tilling cover and the tilling claws can always be kept constant as the rotary tilling device moves up and down. At the same time, depending on the depth of tillage of the rotary tiller, the distance between the tip of the tiller claw and the inner edge of the tiller cover is changed, and when the tillage depth is large, the gap is increased to reduce rotational resistance of the tiller claw. If the tilling depth is shallow, even if the rotational resistance is large, the depth of the tilling claws biting in is shallow, so it can withstand it sufficiently. Therefore, by keeping the gap between the tilling claws and the tilling cover small, The rotation resistance is made constant.

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

In a device in which the tilling cover is rotatable around the tilling claw shaft, the tilling cover rotation center 01 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 used to discharge tilled soil. It is constructed so that it becomes larger in the direction.

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, and the invention will now be described in detail along with the structure of the embodiment shown in the attached drawings.

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,
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 side view of the adjusting rod for the rotation 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.

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 tillage device of the present invention is structured mainly around the rotary gearbox 16, as in the prior art. A tilling case 15 projects downward from the rotary gear box 16, and a tilling claw shaft 30 projects left and right from the tilling case 15. In this example,
Although a center drive type rotary tiller in which a tilling case 15 is provided directly protruding below the rotary gear box 16 is disclosed, a side drive type rotary tiller in which a tilling case is provided vertically at the outer end of the main beam 6 is also disclosed. It may also be a device.

The tilling case 15 is provided with a claw seat, and the tilling claw 14 is attached to the claw seat.
has been planted.

The tilling cover 1, which is the main part of the present invention, includes the rotating tilling claws 1.
The outer circumference of the rotary locus of 4 is coated to prevent the tilled soil from scattering, and to hold the soil between the tilling claws 14 and perform an action on the frame.The front end is open and the rear end is The rear cover 13 is pivotally supported. 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 tiller is raised or lowered by the agricultural tractor's hydraulic system, the rotary tiller is not completely moved in parallel and raised or lowered (the center is centered around the tip of the tractor's lower link and top link). Since the tilling cover 1 is rotated up and down as shown in FIG. It is constructed so that it can be adjusted by rotating.

The tilling cover 1 is rotatably supported by a support bracket 5 for 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. rolling element 2 supported on
is fixed to the surface of the tilling cover 1, and is supported by fitting 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 par 11 is protruded from a pivot portion at the rear end of the rotary gear box 16, and a hanger rod 12 of the rear cover 13 is attached to the depth control par 11.
is suspended via a buffer spring 31. Buffer spring 3
1, so even if the rear cover 13 rotates back and forth or up and down with the rotation of the tilling cover 1, it is supported by the depth control par 11 which is fixed to the rotary gear box 16 and does not rotate. The rear cover 13 is
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 depth handle 11 must be rotated to adjust the height of the depth control handle 11 and the rear cover It is necessary to adjust the appropriate height of 13.

The depth handle 10 supports a handle bracket 22 that protrudes from a top link mast 17 constituting the working machine frame. This is because the adjustment rod 7, which is locked in the rotational position, is supported. 21 is a human power shaft that transmits power into the rotary gear box 16.

In the overall configuration as described above, the present invention sets the center of rotation of the tilling cover as 01 and the center of the tilling claw axis as 02.In the conventional technology, both are the same, but the present invention The centers 01 and 02 are configured separately.

The eccentric position is arranged such that it increases in the direction in which the tilled soil is discharged.

In the configuration of this embodiment, the tilling claws 14 are formed by 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. Therefore, in FIG. 1, the tillage cover 1 is rotated so that the gap m at the rear end of the tillage cover 1 becomes small and the gap n at the front end of the tillage cover 1 corresponding to the soil outlet becomes large. 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 described above, the gap between the tilling cover 1 and the tips of the tilling claws 14 becomes large in the discharging direction of the tilled soil, of course, but the gap C is also increased at the center position of the front and back of the tilling cover 1. When compared, as shown in Figure 1, the gap C1 is the smallest when the plowing depth is shallow, followed by the gap C2 when the plowing depth is normal, and finally the gap C3 when the plowing depth is deep. C can be made large, and the rotational resistance of the tilling claws 14 can be made small during deep tilling. 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.

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 guide bin 32 made of synthetic resin is inserted into the long hole 1a.
The guide pins 32 made of synthetic resin support the rotation of the tillage cover 1 and enable 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 aircraft frame. That is, the adjustment rod 7 is vertically slidably inserted into a sliding hole formed in a rotation pin 18 that is supported by the left and right top link masts 17. The rotating bin 18 can be rotated back and forth.

A rotation adjustment handle 20 is fixed to the upper end of the adjustment rod 7, and a ball joint 27 is fixed to the lower end. The shaft of the tillage cover 1 is fitted into the lower end of the ball joint 27, and the rotation adjustment handle 20 and the adjustment rod 7 can be rotated left and right through the ball joint 27. It is. Further, a locking rod 8 is fixedly installed in parallel with 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 stops moving. Rotate the rotation adjustment handle 20 to lock the locking rod 8.
When the lock a8a is released from the lock fitting 19, the adjustment rod 7
can be slid up and down, allowing the tilling cover ■ to be adjusted. A biasing spring 35 is interposed between the top link mast 17 and the adjustment rod 7, which always biases the locking rod 8 toward the locking metal fitting 19. Locking groove 8a between locking rod 8 and locking fitting 19
The spring is biased to prevent it from coming off.

(F) Effects of the Invention Since the present invention is constructed 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 tiller, the relationship between the tilling claws and the rear cover can always be kept constant, and when the rear cover is also used as a depth control sensor, accurate tilling depth values can always be fed back.

Second, tilling cover rotation center 01 and tilling claw shaft center 02
Since the gap between the toe of the tilling claw and the tilling cover increases in the direction of discharging the tilled soil, the gap on the discharging side of the tilled soil increases, making it easier to discharge the soil. This made it possible to reduce resistance.

Furthermore, when the rotary tiller moves up and down to adjust the plowing depth, the tilling cover rotates in response to this so that it is always at a constant position relative to the tilling claw 14, so that the tilling cover 1 and the tilling claw 14 are The gap can be made large for deep plowing and small for shallow plowing, the rotational resistance of the tilling claws 14 can be kept constant, and the deterioration of the soil crushing effect can be prevented.

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 drawings]

Fig. 1 is a side view showing the rotary tilling device of the present invention in a puddling operation with a shallow plowing depth, Fig. 2 is a side view of the rotary tiller in a 9-way tilling state, and Fig. 3 is a side view of the rotary tilling device of the present invention in a plowing state with a deep plowing depth. Side view,
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 side view of the adjusting rod for the rotation 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. 1... Tilling cover 2... Rolling element 3... Guide rail 5... Support bracket 6... Main beam 7... Adjusting rod 8... Locking rod 14... Tilling claw 17. ... Top link mast 01 ... Center of rotation of tilling cover 02 ... Center of tilling claw shaft

Claims (3)

[Claims] (1) In a device 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 gap between the toe of the tilling claw and the tilling cover is widened. A rotary tillage device characterized in that it is configured to increase in size in the direction of discharging tilled soil. (2) A rotary device characterized in that the tilling cover according to claim 1 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 a rolling element. Tillage equipment. (3) A rotary tillage device characterized in that an adjustment rod for rotating the tillage cover by push-pull operation is provided between the tillage cover according to claim 1 and the working machine frame side.