JPH04311301A - Rotary tiller - Google Patents

Abstract

PURPOSE:To facilitate the switching between shallow tilling and deep tilling and the adjustment of tilling depth with a gauge ring by attaching a depth frame to a front frame in a specific state. CONSTITUTION:The front part of a depth frame 15 is pivoted to the rear end of a front frame 12 with a pin and the front end of the depth frame is fixed to the center of the front frame with a pin. The front frame has plural vertical pin holes 1 at the center. The front end of the depth frame is adjusted in vertical direction to switch between shallow tilling state and deep tilling state.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a rotary tillage device with a tillage cover, a rear cover, and a depth frame.
It relates to technology that allows changes to be made easily and in conjunction with changes in tillage work.

0002

2. Description of the Related Art Conventionally, a technique has been known in which a tilling cover of a rotary tilling device is rotated about a pawl shaft in accordance with operations such as plowing and deep tilling. For example, JP-A-6
This is a technique disclosed in Publication No. 2-134005. In addition to setting the plowing depth by feeding back the rotation of the rear cover and controlling the hydraulic system to change the height, a gauge wheel is attached to the depth frame and the height of the gauge wheel is changed. There was also a technique to determine the plowing depth.

0003

[Problems to be Solved by the Invention] If the rear cover is configured to use a sensor to detect the amount of rotation and control the hydraulic system to maintain a constant plowing depth, the rear cover must be configured to rotate freely. The rear cover could not hold down the top surface after tilling. Therefore, work is done by setting the plowing depth using a gauge wheel, but changing the height of the gauge wheel and changing the tilling cover and rear cover were done separately, which made setting difficult and complicated operations. It had become. Furthermore, when changing the plowing depth using the gauge wheel, the adjuster handle had to be rotated many times, which was cumbersome, and the setting position was not clear.

0004

[Means for Solving the Problems] In view of the above points, the present invention provides a support stay 1 projecting rearward from the main beam 3.
1, the front end of the front frame 12 is pivoted to the rear end of the front frame 12, and the depth frame 15 is pivoted to the front middle part of the front frame 15 as a rotation fulcrum. It is configured such that the rotational position can be adjusted up and down at the center. Further, in the rotary tilling device in which the rotary cover 6 is rotatable around the tilling claw shaft,
A link 21 is interposed between the depth frame 15 and the rotary cover 6, and the rotary cover 6 is configured to rotate in conjunction with adjustment of the vertical position of the depth frame 15. In addition, in a rotary tilling device in which the rotary cover 6 is rotatable around the tilling claw shaft, a hanger rod support stay 22 is provided protruding from the main beam 3, and a hanger whose rotational position can be adjusted is provided on the hanger rod support stay 22. A rod stay 23 is pivotally supported, and a hanger rod 24 is attached to the rear end of the hanger rod stay 23.

[0005]

[Embodiment] The problems to be solved by the present invention and the means for solving them are as described above.Next, the configuration of the embodiment of the two-point link type rotary tilling device shown in the attached drawings will be explained. Fig. 1 is a side view of the rotary tiller of the present invention, Fig. 2 is a plan view, Fig. 3 is a plan view of the depth frame attachment part, Fig. 4 is a side view, and Fig. 5 shows the depth frame and rotary cover for shallow tillage. A side sectional view showing the relationship,
Fig. 6 is a side sectional view of the case of deep plowing, Fig. 7 is a side sectional view of the rear cover attachment part of the case of shallow plowing, Fig. 8 is a side sectional view of the same case of deep plowing, and Fig. 9 is a plan sectional view of the hanger rod support stay part. It is. Although this embodiment shows a rotary tilling device attached to a two-point link type work machine mounting device, a three-point link type rotary tilling device may also be used.

1 and 2, the front end of the main support 1 is pivoted to the rear of the tractor, and the main support 1
is provided to protrude forward from the gear case 2, and main beams 3, 3 are protruded from the gear case 2 on both sides. A side plate 4 is fixed to one end of the main beams 3, 3, a chain case 5 is fixed to the other end, and a tiller claw shaft is mounted on the lower end between the side plate 4 and the chain case 5. , the tilling claw shaft is driven from the gear case 2 via the transmission shaft in the main beam 3 and the chain in the chain case 5, and the upper part of the rotation trajectory A of the tip of the tilling claw implanted in the tilling claw shaft A tilling cover 6 covering the tilling cover 6 is supported between the side plate 4 and the chain case 5 so as to be slidable back and forth about a tilling claw shaft, and a rear cover 9 is pivotally supported on the rear side of the tilling cover 6.

Main beams 3 and 3 on both sides of the gear case 2
Upper arms 7, 7 protrude rearwardly and upwardly from the main beams 3, and an adjuster handle 10 is supported on the upper ends of the upper arms 7, 7, and support stays 11, 11 are protruded rearwardly from the main beams 3, 3, as shown in FIG. 3. As shown in FIG. 4, front frames 12 are pivotally supported at the rear ends of the support stays 11 by pins 13, and the front frame 12 is configured in a diamond shape, with a pin 14 at the rear end. The front part of the depth frame 15 is pivoted at the pin 16, and the front end of the depth frame 15 is supported by the pin 16.
It is fixed to the center of the front frame 12 at. In the center of the front frame 12, pin holes 12a, 12b, 12 are provided in the vertical direction.
c is opened, and a pin is inserted at the top, bottom, and center of the front frame 12, centering on the pin 14, with the length between the pin hole of the depth frame 15 into which the pin 14 is inserted and the pin hole of the pin 16 as a radius. Holes 12a, 12b, and 12c are provided, and when the pin 16 is inserted into the upper and lower holes, the depth frame 1
A stopper 12 is installed on the side of the front frame 12 to stop the
d.12e is permanently installed. However, it is also possible to configure the front frame 12 in a fan shape and rotate the rear part of the depth frame 15 around the pin hole 12c.

[0008] A connecting rod 1 is provided between the front frames 12 and 12.
7 is fixedly installed, and the lower end of the adjuster handle 10 is pivotally supported at the center of the connecting rod 17.
By rotating the depth frame 15, the depth frame 15 can be moved up and down. A depth beam 19 is attached to the rear of the depth frame 15 so that its length can be adjusted back and forth, and gauge wheels 2 are attached to both ends of a horizontal rod 19a installed horizontally at the rear end of the depth beam 19.
0.20 is supported. In addition, the depth frame 1
5. A pin 15a protruding from the front side surface is for supporting a sensor attached when controlling the plowing depth.

Furthermore, as shown in FIG.
The front end of a link 21 is pivotally supported on the rear part of the rotary cover 6, and the other end of the link 21 is pivotally supported on the rear upper surface of the rotary cover 6, and the depth frame 15 is rotated up and down in accordance with shallow plowing, deep plowing, etc. According to the rotation, the rotary cover 6 is also configured to rotate back and forth. In other words, when performing shallow plowing such as puddling, as shown in FIG.
5 is rotated around the pin 14 and fixed, changes can be made at once without rotating the adjuster handle 10, and fine adjustments can be made using the adjuster handle 10. Along with the rotation, the link 31 pushes the rotary cover 6, allowing shallow plowing. When performing deep tilling, the pin 16 is inserted into the pin hole 12b to fix the tip of the depth frame 15, and at the same time, the rotary cover 6 is pulled by the link 21 and is placed between the rear cover 9 and the rotation trajectory A of the tip of the tilling claw. This creates space and eliminates horsepower loss.

The rear cover 9, which is pivotally supported on the rear side of the rotary cover 6, is also rotatable in accordance with shallow plowing, deep plowing, etc. As shown in FIGS. 7 and 9, the main beam From 3.3, hanger rod support stays 22 and 22 are provided on both sides of the support stay 11 to protrude rearward, and unlike conventional methods, fixing the hanger rod support stays on the rotary cover results in insufficient strength and increases the weight of the rotary cover. The hanger rod support stays 22, 22 are provided with pin holes 22a, 22b in the front and rear direction.
is opened and the hanger rod stay 23 is connected to the pin 25.2.
6, and a hanger rod 24 is pivotally supported at the rear of the hanger rod stay 23. The hanger rod 24
The lower end of the plate 9a projects upward from the rear cover 9.
The upper spring 2 of the hanger rod 24 is
8. A spring 29 is fitted to the lower part to urge the rear cover 9 downward. Then, as shown in FIG. 7, when performing work such as shallow plowing or puddling, the hanger rod stay 23 is placed against the stopper 27, and the hanger rod support stay 22 is fixed by inserting pins 25 and 26 into the pin holes 22a and 22b. During deep plowing work, remove the pin 25 and rotate the hanger rod stay 23 around the pin 26 to lock the pin 25 in contact with the lower part of the hanger rod support stay 22, as shown in Figure 8, with the rear cover 9 lifted. It is designed to be able to handle deep plowing work.

[0011]

[Effects of the Invention] With the above structure, the following effects can be obtained. That is, since the structure is configured as claimed in claim 1, the depth frame can be easily adjusted up and down, and switching between shallow plowing and deep plowing can be easily performed, and the user can also do it without fail. Also,
Even when switching to shallow plowing or deep plowing, the amount of adjustment using the adjuster handle is small, the adjustment can be made in a short time, and plowing depth can be easily adjusted using the gauge wheel. Additionally, the gauge wheel can now be easily attached and detached from the depth frame.

[0012] Since the structure is configured as in claim 2, when the adjuster handle is rotated and the depth frame is rotated up and down in accordance with the tilling work, the rotary cover is also rotated in accordance with the rotation, and the depth frame is rotated in accordance with the plowing work. This eliminates the need for adjustment each time the rotary cover is changed, and the adjustment member can be omitted by simply adding a link with a simple structure.

[0013] With the structure as recited in claim 3, the lack of strength when the hanger rod support stay is attached to the rotary cover is solved, and the hanger rod can be easily assembled, resulting in cost reduction. Additionally, during deep plowing work, the hanger rod stay can be freed to eliminate the need to press down the soil.

[Brief explanation of drawings]

FIG. 1 is a side view of a rotary tiller according to the present invention.

FIG. 2 is a plan view of the rotary tiller.

FIG. 3 is a plan view of the depth frame attachment part.

FIG. 4 is a side view of the depth frame attachment part.

FIG. 5 is a side sectional view showing the relationship between the depth frame and the rotary cover in shallow plowing.

FIG. 6 is a side cross-sectional view in the case of deep plowing.

FIG. 7 is a side cross-sectional view of the rear cover attachment part in the case of shallow plowing.

FIG. 8 is a side cross-sectional view in the case of deep plowing.

FIG. 9 is a cross-sectional plan view of the hanger rod support stay part.

[Explanation of symbols]

3 Main beam 6 Rotary cover 11 Support stay 12 Front frame 15 Depth frame 21 Link 22 Hanger rod support stay 23 Hanger rod stay 24 Hanger rod

Claims (3)

[Claims] Claim 1: The front end of a front frame 12 is pivoted to a support stay 11 provided rearwardly protruding from the main beam 3, and the depth frame 15 is pivoted to the front midway part of the front frame 12 and serves as a rotation fulcrum. , the depth frame 1 is centered around the rotation fulcrum.
5. A rotary tiller characterized in that the front end of the front end is configured to be vertically adjustable in rotational position at the center of the front frame 12. 2. In a rotary tilling device in which the rotary cover 6 is rotatable around a tilling claw shaft, a link 21 is interposed between the depth frame 15 and the rotary cover 6 to adjust the vertical position of the depth frame 15. A rotary tiller characterized in that the rotary cover 6 is configured to rotate in conjunction with the rotary tiller. 3. A rotary tiller in which the rotary cover 6 is rotatable around a tiller claw shaft, in which a hanger rod support stay 22 is provided protruding from the main beam 3,
A rotary tillage device characterized in that a hanger rod stay 23 whose rotational position can be adjusted is pivotally supported on the hanger rod support stay 22, and a hanger rod 24 is attached to the rear end of the hanger rod stay 23.