JPS6119601Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field The present invention allows a pair of tilling working parts to be moved up and down individually on the drive shaft facing in the width direction of the tractor, and also to be able to individually adjust the displacement in the width direction. This invention relates to tractor tillage working machines arranged side by side in the following manner.

(b) Prior art As for the prior art related to the present invention, for example, there is a technology disclosed in Japanese Unexamined Patent Application Publication No. 13102/1983, in which a pair of tilling working parts can be moved and adjusted along a drive shaft that is long in the width direction of the tractor. For example, there are those that are equipped with a pair of tilling sections that can be rotated in the vertical direction, as shown in Japanese Utility Model Application Publication No. 48-9501.

(c) Problems to be solved by the invention Therefore, by combining the former and the latter of the conventional techniques, it is possible to adjust the displacement of the pair of tilling parts vertically and horizontally. Although it can be said that it is easy to configure the structure so that it can be done, the conventional technology allows fine adjustment of the height above the ground of a pair of tilling units installed in parallel at the same time, and it can also be adjusted individually as necessary. Since it was not possible to finely adjust the height above the ground, it would be difficult to adjust the height above the ground by simply combining the previous and latter technologies.
There is a problem in that it is not possible to set the plowing depth with high precision in response to differences in field conditions.

(d) Means for Solving the Problems In order to solve the above problems, the present invention provides a system in which the pair of tilling working parts can be moved up and down separately on the drive shaft facing in the width direction of the tractor, and can be moved up and down separately in the width direction of the tractor. In a tilling work machine arranged in parallel so as to be able to adjust displacement in a direction, a suspension support plate extending rearward from a gear box supporting the drive shaft is pivotally supported to be vertically movable with respect to the gear box, and A suspension frame parallel to the drive shaft is supported on the suspension support plate, and a depth adjuster for fine height adjustment is interposed between the suspension frame and the gearbox, and the other part of the suspension frame is A biasing support plate whose position can be adjusted in the width direction in response to the widthwise displacement of each tilling work section is fitted, and downward biasing pressure is applied between each biasing support plate and each tillage work section. A plowing work machine is constructed by providing elastic pressure biasing devices each having an adjustable structure.

(E) Effect Therefore, according to the present invention, fine adjustment of the tilling depth (height above the ground) of the pair of tilling working sections can be made simultaneously for both tilling working sections, but also individually when necessary. This allows for highly safe tilling work by alleviating the impact on each tilling section during work.

(F) Embodiment An embodiment of the present invention will be described below based on the drawings. Referring to FIGS. A pair of left and right lower links 7, 7, on which the seat 3 and the power extraction shaft 4 are arranged, and which are operated to move up and down by the elevating link 5 via each connecting link 6;
A three-point support mechanism is provided, comprising an upper link 9 pivotally connected to a link hitch 8 which is fixed in the upper direction between 7 and 10, and 10 is connected to the three-point support mechanism at the rear of the tractor 1. This tillage working machine 10 is constructed as follows according to the present invention.

That is, the tillage work machine 10 of this embodiment has a pair of tillage work sections 1 disposed in the width direction of the tractor 1.
1 and 11 are installed oppositely, and both tillage working sections 11,
11 are connected via a pair of cylindrical fixed beams 13, 13 that protrude from both sides of the gear box 12 in the horizontal direction along the width direction of the tractor 1. The rod 14 is attached to the upper link 9 and the fixed beam 13,1
The connecting plate 15 protruding from 3 is connected to each of the lower links 7,
7, and are pivotably connected to each other in a detachable manner.

The gearbox 12 and the fixed beam 13,1
3 has a horizontal drive shaft 16 rotatably installed along the width direction of the tractor 1 but not movable in the axial direction. 18,1
They are interlocked and connected via 8.

The tilling work section 11 fixes the upper end of the transmission case 20 to a cylindrical adjustment beam 19 that is inserted into the fixed beam 13 so as to be rotatable and movable in the axial direction. A center drive type is adopted in which the central part of the tilling shaft 21 along the drive shaft 16 is rotatably supported at the lower end by a bearing so as not to be able to move in the axial direction, and an appropriate number of tilling claws 22, 22, . . . are provided at appropriate intervals. A removably attached tilling claw shaft 23 is detachably attached to the tilling shaft 21, and a support frame 24 is provided rearwardly protruding from the transmission case 20, and a rear portion of the support frame 24 has a tail that can be vertically displaced. A ring 25 is attached and a cover 26 covering the top of the tilling claws 22, 22, . . . is fixed to both sides of the support frame 24.

That is, each of the tilling working parts 11, 11 configured as described above can be vertically movable individually around the fixed beams 13, 13.

Next, the suspension device 27, which is a biasing means in this embodiment that biases each of the tilling units 11, 11 with a constant pressure, is pivoted to the fixed beams 13, 13 so as to be movable up and down, respectively. The suspension frame 29 is horizontally supported by a pair of suspension support plates 28, 28 of appropriate lengths, and a support plate 30 facing the suspension frames 28, 28 is provided at an appropriate position of the connecting arm rod 14 installed upright on the gearbox 12. An outer cylinder 31 of an appropriate length is pivotally attached to the distal end of the support plate 30, and an inner cylinder 32 of an appropriate length to be inserted into the outer cylinder 31 is pivotally attached to the center of the suspension frame 29 in the width direction. A screw shaft 33 connected to the outer cylinder 31 and having a plowing depth adjustment handle 33a is rotatably and movably moved in the axial direction, and a nut tool 3 is fixedly fitted into the inner cylinder 32.
2a, and a plurality of width holes 3 are formed along the width direction of the suspension frame 29 on both sides of the width direction.
4, 34... are arranged in series, and a hole 3 passes through the cylindrical base in the vertical direction and has a hole corresponding to the width hole 34.
An energizing support plate 36 consisting of a tip portion having a diameter of 5 is externally fitted onto the suspension frame 29 so as to be displaceable in the width direction,
A pin 37 is fixed at a position facing the support frame 24 of the tilling work section 11 in the vertical direction by inserting it into the width-determining hole 34 and the hole of the biasing support plate 36. A sliding rod 39 having a plurality of positioning holes 38, 38, . An upper compression spring 40 and a lower compression spring 41 are located on both upper and lower sides of the biasing support plate 36 and are mounted on the sliding rod 39, and the upper compression spring 40 locks the locking pin 42 into a predetermined position of the positioning hole 38. The locking pin 43 is set at a predetermined position in the positioning hole 38 so that the lower compression spring 41 is in a state where the tilling work part 11 is urged downward with a constant pressure. It is locked by being inserted.

Note that instead of using both the upper compression spring 40 and the lower compression spring 41, the sliding rod 39 is inserted into the through hole 35 of the biasing support plate 36 with the locking pin 42'.
The energizing support plate 3 is inserted in a downwardly unremovable manner by the
A lower compression spring 41 is fitted between the slide rod 39 and the support frame 24, and the tilling work section 1
1 and 11 may be biased downward by the compression springs 41' separately (see FIG. 6).

That is, by manually rotating the plowing depth adjustment handle 33a, the pivot points A and B between the support plate 30 and the suspension frame 29 are made to expand and contract relatively, so that each plowing work section 11 and 11 are simultaneously rotated up and down about the drive shaft 16, each tilling work section can be set at a predetermined plowing depth, and within the elastic range of the upper compression spring 40 and the lower compression spring 41, a certain plowing depth can be set. When a pressure higher than the load is applied, each tilling section 11 can be oscillated up and down, and when each tilling section 11 returns to the no-load state, it is returned to its initial setting by the biasing action of the lower compression spring 41. The sliding rod 39 can be inserted into the through hole 35 on the same vertical plane in the tractor traveling direction in response to the adjustment of the widthwise displacement of the tractor 1 of the tilling work section 11. In addition, the biasing support plate 36 can be adjusted in displacement in the width direction of the suspension frame 29.

Further, a rotation regulating plate 4 in which an arc-shaped elongated hole 44 is formed in each of the fixed beams 13 with the axis thereof as the center.
5 are protruded from each other, and each adjustment beam 19 is provided with a movement adjustment plate 46 which is opposed to the rotation restriction plate 45, and each rotation support plate 45 and each movement adjustment plate 46 are provided so as to protrude from each adjustment beam 19.
After passing through the elongated holes 44 of the rotation regulating plate 45, screw nuts 47, 47 are inserted between them, and a nut 48 fixed to the movement adjusting plate 46 is screwed in to pass through the adjusting plate 46. A length adjustment bolt 49 is interposed.

That is, each adjustment bolt 49 and each nut 4
7, 47, the distance between the two tilling working parts 11, 11 in the width direction of the tractor can be appropriately adjusted, and the tilling working width can be adjusted. Both tilling working parts 11, 11 individually move up and down within the range of movement within the elongated hole 44, and the sliding rod 39 also slides up and down.

In addition, despite the above-mentioned rotational adjustment of each tilling work unit 11, 11 around the drive shaft 16 and adjustment of the widthwise movement of the tractor 1, the drive shaft 16 and each tilling shaft 21 are always interlocked and connected. The power transmission mechanism has both end portions of the drive shaft 16 formed into spline shaft portions 16a, 16a, and each transmission case 20.
, a transmission shaft 5 whose axis line coincides with the drive shaft 16
0 is installed rotatably but immovably in the axial direction, and each spline shaft portion 1 of the drive shaft 16 is installed at the end of each transmission shaft 50.
A spline groove 51 is spline-fitted to the drive shaft 16 and is non-rotatable and movable in the axial direction with respect to the drive shaft 16.
A connecting shaft cylinder 51 with a is fixed, and a reversing intermediate shaft 52 gear-coupled to the transmission shaft 50 is provided in each transmission case 20, and the reversing intermediate shaft 52 and the tilling shaft 21 are connected to a sprocket wheel. 53,
54 and an endless chain 56.

Therefore, each tilling shaft 21 is always connected to the drive shaft 16 regardless of the rotational displacement and movement adjustment of the tilling work section 11.
From there, the connecting shaft cylinder 51, the transmission shaft 50, and the reversing intermediate shaft 5
The power is transmitted through 2.

When carrying out plowing work, first set the desired plowing depth by adjusting the plowing depth adjustment handle 33a and adjusting the vertical position of the tailwheel 25, and then adjust the soil conditions of the field (for example, clay/sandy soil). etc.), the pressure that urges each working part 11, 11 downward is adjusted.

That is, the upper compression spring 40 and the lower compression spring 4
Locking pins 42 and 43 that lock 1, respectively.
The biasing pressure is adjusted by selecting the insertion position of the locking pins 42 and 43 into the positioning hole 38, and by narrowing the vertical distance between the locking pins 42 and 43, the downward pressure is weakened.

In other words, in fields with high load resistance such as clay soil, it is sufficient to increase the energizing pressure, and in fields with sandy soil and other soils with low load resistance, the energizing pressure can be reduced. A downward biasing pressure suitable for the magnitude of the load resistance can be obtained.

Further, in this embodiment, the tilling work part 11 is described which uses only the tilling claw shaft 23, so-called rotary, in which the tilling claws 22, 22 are installed. Performing the work is also an important role, and in that case, instead of the tilling claw shaft 22, an attachment for pre-treatment of ridge-building, such as a rotor, is attached to each tilling shaft 22, and a ridge-building tool such as a soil plate is attached to each tilling shaft 22. Each tilling work section 11 is configured by being positioned behind the attachment and attached to the attachment hole 24a of each support frame 24. To adjust the ridge width when actually doing the ridge-raising work, first press the pin 3 inserted into the width-determining hole 34.
7 to make the bias support plate 36 slidable in the longitudinal direction of the suspension frame 29, and then remove the adjustment bolt 4.
By turning 9, the displacement of each tilling working part 11 is adjusted in the width direction of the tractor to determine its position and set the furrow width. Further, at the same time as the position of each tilling work section 11 is moved and adjusted, the energizing support plate 36 is also moved on the suspension frame 29 accordingly. The pin 37 for setting the ridge width is again inserted into the appropriate positioning hole 34, and the biasing support 36 is fixed to the suspension frame 29 so as not to rotate and not to move in the longitudinal width direction. That is, the ridge width can be adjusted by such a simple operation.

In addition, when cultivating a sloped surface, etc., if it is necessary to set the rotation adjustment positions of the tilling working parts 11, 11 to different heights, the adjustment of the tilling working part 11 which is desired to be set to a higher rotational position is possible. Locking pin 4
2, 43 are inserted into the positioning hole 38 located at a lower part of the sliding rod 39, and the tilling work section 11 is set at a relatively higher rotational position than the other tillage work sections 11. It is something. In other words, even when cultivating sloping land, it is possible to adopt a working posture that adapts to the slope.

During the tilling work, the tilling work section 11
The upper compression spring 40
The impact is relaxed and absorbed by the elasticity of the lower compression spring 41, so no shock load is applied to the tilling operation or the tractor, ensuring sufficient safety during the tilling operation. Since the impact load is relaxed and absorbed independently, even if one of the tilling work sections 11 is subjected to an impact load and jumps up, other tillage work can be continued. Therefore, work performance and work efficiency can be sufficiently improved especially in fields that are susceptible to shock loads such as uneven ground.

(G) Effect of the invention As shown in the embodiments above, the tilling machine according to the present invention has a pair of tilling sections 11, 11.
A tilling machine is constructed by arranging the following gearboxes in parallel on a drive shaft 16 facing in the width direction of the tractor so that each can be moved vertically and can be individually adjusted in displacement in the width direction, and a gearbox 12 that supports the drive shaft 16.
A suspension support plate 28 extending rearward from the gear box 12 is pivotally supported to be vertically movable with respect to the gearbox 12, and supports a suspension frame 29 parallel to the drive shaft 16. A depth adjuster for fine height adjustment is interposed between the and gear box 12, and a depth adjuster is provided in the other part of the suspension frame 29 in the width direction in response to the widthwise displacement of each of the tilling sections 11, 11. Force support plate 3 whose position can be adjusted
6, 36 are fitted, and between each urging support plate 36, 36 and each tilling work part 11, 11, an elastic pressure urging device configured to be able to adjust the downward urging pressure is provided, respectively. Therefore, it has the following advantages.

(b) Even if an impact load occurs in the tilling work section of the tilling work zone, the impact load is relaxed and absorbed, so the safety of the tillage work can be sufficiently ensured, and (b) Furthermore, each tillage work section are individually movable up and down and each is energized downward, so even if one tilling work part receives an impact load and moves up and down, the other tillage work parts will not be affected by each tillage work part. (c) In highly uneven fields or sloping fields, each tilling work section should be set separately to adapt to the field conditions. This is advantageous because it allows the user to take a plowing posture.

(d) In addition, a depth adjustment device is interposed between the gear box and the suspension support plate, and a clamping force that can adjust the clamping force is provided between the suspension frame supported by the suspension support plate and each plowing work section. Since each plowing device is configured with a separate force tool, it is possible to finely adjust the height of a pair of tilling sections from the ground at the same time by operating the depth adjustment device, and also to adjust each plowing section individually by adjusting the pressure biasing device. Since the height above the ground can be adjusted separately, by both adjustment operations, it is possible to maintain a highly accurate plowing depth and to perform neat plowing.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention.
The figure is a side view of the tillage machine connected to the tractor, Figure 2 is a plan view, Figure 3 is a cutaway plan view showing the power transmission mechanism, and Figure 4 is a cross-section taken along the - line in Figure 2. 5 is a side view, and FIG. 5 is a cross-sectional view of FIG. 1, and FIG. 6 is a view corresponding to FIG. 4 in another embodiment. 1...Tractor, 4...Power take-off shaft, 10...
... Tilling machine, 16... Drive shaft, 11... Pair of tilling working parts, 27... Suspension device (energizing means).

Claims (1)

[Scope of utility model registration request] In the tilling work machine, a pair of tilling working parts 11, 11 are arranged side by side on a drive shaft 16 facing in the width direction of the tractor so that each part can be moved up and down separately and can be adjusted in displacement in the width direction. Drive shaft 16
A suspension support plate 28 extending rearward from the gearbox 12 supporting the gearbox 12 is pivotally supported to be vertically movable relative to the gearbox 12, and supports a suspension frame 29 parallel to the drive shaft 16. However, this suspension frame 29 and gearbox 1
2 is interposed with a depth adjuster for fine height adjustment, and the other part of the suspension frame 29 is provided with a position adjuster in the width direction corresponding to the widthwise displacement of each of the tilling sections 11, 11. Fit the energizing support plates 36, 36 that can be used, and connect each energizing support plate 36, 36 and each tilling work section 1
1 and 11, each of which is provided with an elastic pressure biasing device configured to be able to adjust the downward biasing pressure.