JPS6118649Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a tillage machine that is energized and connected to a tractor to perform tillage work, and is particularly capable of precisely adjusting the tillage depth and increasing the support strength of the tillage section. The purpose is to

The present invention is a tilling machine in which an adjustment beam 23 is loosely installed on a fixed beam 14 protruding from a gearbox 13, and a transmission case 24 is fixed to the adjustment beam 23. A plowing depth adjuster is interposed between the support plate 31 and a connecting rod 29 which is pivotally supported at a predetermined distance from the transmission case 24 of the plowing section 11. .

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the first embodiment shown in FIGS. 1 to 7,
1 has a driver's seat and a power take-off shaft 4 disposed between a pair of rear wheels 2, 2, and a pair of left and right lower links 7, 7 which are operated up and down by an elevating link 5 via each connecting link 6. This is a conventional tractor equipped with a three-point support mechanism consisting of an upper link 9 pivotally connected to a link hit 8 which is fixed upward between lower links 7, 7, and 11 is a three-point support mechanism at the rear of the tractor 1. This tillage working machine according to the present invention is connected via a point support mechanism, that is, a pair of lower links 7 and 7 and an upper link 9. This tillage working machine 11 is constructed as follows according to the present invention. It is being done.

That is, the tilling work machine 11 of this embodiment is as follows:
A pair of tilling working parts 12, 12 are arranged side by side on the left and right sides in the width direction of the tractor 1, and a space between both tilling working parts 12, 12 is provided to protrude from both sides of the gearbox 13 in the horizontal direction along the width direction of the tractor 1. A connecting arm rod 15 erected on the gearbox 13 is connected to the upper link 9 and each beam 14 is connected via a pair of cylindrical fixed beams 14, 14.
A connecting plate 16 protruding from the lower link 7 is pivotably connected 17 or 18, 18 to each of the lower links 7 in a detachable manner.

The gearbox 13 and the fixed beam 14,1
4 is equipped with a horizontal drive shaft 19 that is rotatable but immovable in the axial direction along the width direction of the tractor 1. 20 are further interlocked and connected via bevel gears 21 and 22.

Further, the tilling work section 12 is connected to a cylindrical adjustment beam 23 that is inserted into the fixed beam 14 so as to be rotatable and movable in the axial direction.
4, and the central part of a tilling shaft 25 along the drive shaft 19 is rotatably but immovably supported in the axial direction by a bearing on the lower end of the transmission case 24, and the tilling shaft 25 is spaced at an appropriate distance. A suitable number of tilling claws 26, 26... are detachably attached at intervals, and a support frame 27 is provided rearwardly protruding from the transmission case 24, and a small diameter tail that can be adjusted up and down is attached to the end of the support frame 27. It is constructed by attaching a ring 28.

In addition, a pair of suitable lengths are installed in the vicinity of the upper ends of both transmission cases 24, 24, and are slidably inserted into horizontal connecting rods 29 whose respective tips are aligned with the axis of the drive shaft 19. The plowing depth adjusting plates 30, 30 are provided to protrude rearward, and between the supporting plate 31 facing the plowing depth adjusting plate 30 and the connecting rod 29, the plowing depth adjusting plates 30, 30 are provided at appropriate positions on the connecting arm rod 15 which is erected on the gear box 13. , the supporting plate 31 is provided protrudingly, and an outer cylinder 32 of an appropriate length is pivotally connected 33 to the tip of the supporting plate 31, and an appropriate length is provided at the center of the connecting rod 29 to allow the outer cylinder 32 to be inserted through the central part. The inner cylinder 34 is pivotally connected 35, and the screw shaft 36 having a plowing depth adjustment handle 36a is connected to the outer cylinder 3.
2 is provided with a plowing depth adjusting tool which is screwed into a nut tool 37 that is rotatably but not axially movable and is fitted and fixed in the inner cylinder 34. That is, by manually rotating the plowing depth adjustment handle 36a, the nut tool 37, that is, the inner cylinder 34, is moved considerably relative to the screw shaft 36, that is, the outer cylinder 32, and is connected to the support plate 31. Pivot point 3 with rod 29
3 and 35 are relatively expanded and contracted, so that each plowing depth adjusting plate 30 is connected to each transmission case 24.
That is, each tilling working part 12 can be rotated in the vertical direction about the drive shaft 19, and by rotating the tilling depth adjustment handle 36a, both tilling working parts 12 and 13, that is, tilling The pawls 26, 26 can be adjusted up and down by the required amount, and the plowing depth can be adjusted in small steps.

Further, a rotation regulating plate 3 having an arc-shaped elongated hole 38a centered on the fixed beam 14 is formed in the fixed beam 14.
8 are protruded, and each adjustment beam 23 is provided with a movement adjustment plate 39 protruding from the rotation restriction plate 38, and each rotation restriction plate 38 and each movement adjustment plate 39 are provided in a protruding manner.
The upper nuts 40 and 41 passing through the elongated holes 38a of the rotation regulating plate 38 are screwed in between them, respectively, and the nuts 42 fixed to the movement adjusting plate 39 are screwed into the upper nuts 40 and 41 to pass through the movement adjusting plate 39. Length adjustment bolt 43
is interposed. That is, by adjusting each adjustment bolt 43, the distance in the width direction of the tractor 1 of both tilling working sections 12, 13 can be adjusted as appropriate, thereby making it possible to adjust the ridge width in the ridge raising work. Also, both of the above-mentioned working parts 12, 12
The rotational displacement adjustment amount is determined by the elongated hole 38 of each rotation regulating plate 38.
This is controlled by the engagement between a and the adjustment bolt 43.

The drive shaft 1 of each of the tilling work parts 12 is
The power transmission mechanism for always connecting the drive shaft 19 and each tilling shaft 25 in an interlocking manner regardless of the adjustment of the rotational displacement around the nine axes and the adjustment of the widthwise movement of the tractor 1 is configured as follows.

That is, both end portions of the drive shaft 19 are formed into spline shaft portions 19a, 19a, and a transmission shaft 44 whose axis line coincides with the drive shaft 19 is installed in each transmission case 24 so as to be rotatable but immovable in the axial direction. A connecting shaft cylinder 45 with a spline groove 45a that is non-rotatable and movable in the axial direction with respect to the drive shaft 19 is fixed to the end of each transmission shaft 44 by spline fitting to each spline shaft portion 19a of the drive shaft 19. In addition, in each transmission case 24, the transmission shaft 44
A reversing intermediate shaft 4 connected to spur gears 46 and 47
8, and the shaft 48 and the tilling shaft 25 are interlocked and connected via sprocket wheels 49, 50 and an endless chain 51. Therefore, each tilling axis 25
Regardless of rotational adjustment and movement adjustment of the tilling work section 12, power is always transmitted from the drive shaft 19 through the connecting shaft cylinder 45, the transmission shaft 44, and the reversing intermediate shaft 48.

Further, in this embodiment, the vertical adjustment mechanism of each tail wheel 28 is configured as follows, so that the vertical height position of the tail wheel 28 can be adjusted by a wide range or by a small amount. It has been devised.

That is, a support tube 53 having a vertically divided portion whose inner diameter is expandable and retractable is fixed to the end of each support frame 27 by a cam lever 52, and an outer tube 54 is inserted and supported in each support tube 53 so as to be movable up and down. Cylinder 54
A screw shaft 56 is provided with a tail wheel adjustment handle 56a, which inserts and supports the support shaft cylinder 55 in a vertically movable manner.
The tail wheel 28 is installed at the lower end of each support shaft cylinder 55 by screwing each threaded shaft 56 into a nut 57 which is fitted and fixed in each support shaft cylinder 55. It is pivoted. That is, by operating the cam lever 52, the supporting position of the outer tube 54 relative to the support tube 53 can be adjusted over a wide range, and therefore the height of the tail wheel 28 can be adjusted over a wide range. By rotating the tail wheel adjustment handle 56a, the outer cylinder 5
Since the support position of the support shaft cylinder 55 relative to the tail wheel 28 can be adjusted in small steps, the height of the tail wheel 28 can also be adjusted in small steps.

In the figure, 58 is a reinforcing plate that reinforces and supports the connecting arm rod 15, and 59 and 59 are a pair of covers disposed on both sides of each support frame 27. Moreover, 30a is a fixing bolt for fixing each plowing depth adjusting plate 30 at an arbitrary position of the connecting rod 29, and each fixing bolt 30a is used for fixing each plowing depth adjusting plate 30 at an arbitrary position of the connecting rod 29.
When moving in the width direction of tractor 1,
Each plowing depth adjusting plate 30 is also loosened so that it can move on the connecting rod 29 accordingly.

Since the tilling machine according to the present invention is constructed as described above, its operation will next be explained with reference to the above embodiment.

That is, the tillage work machine 11 is connected to the rear of the tractor 1 via the three-point support mechanisms 7, 7, and 9.
8, 18, and 17, first operate the cam lever 52 to adjust the height of the tail wheel 28 by a wide range, and then rotate the tail wheel adjustment handle 56a to adjust the height. Therefore, the relative height of the tail wheel 28 with respect to the tractor 1 is
The relative height of the image is set appropriately (solid line in Figure 1).

Incidentally, the tillage depth can be adjusted only by adjusting the height of the tailwheel 28, and in fact, this has been done in the past, but adjusting the height of the tailwheel 28 is very effective. Of course, when it can only be performed in a wide stepwise manner, even when it can be performed in a small stepless manner as in the above embodiment, the tail wheel 2
8. It is difficult to adjust the plowing depth only by adjusting the height.

That is, during plowing work, the tail wheel 28 is driven to follow the field in a state where it is slightly sunken from the field surface, and the amount of sunken tail wheel 28 changes depending on various conditions such as the properties of the field. Therefore, since adjusting the plowing depth by adjusting the height of the tail wheel 28 only determines the relative position of the tilling claws 26 with respect to the tractor 1 by the relative position of the tail wheel 28 with respect to the tractor 1, the above point is not correct. No matter how much consideration is given to adjusting the plowing depth, it is difficult even for a skilled worker to reliably and accurately adjust the plowing depth by only adjusting the height of the tail wheel 28. .

Therefore, in the tilling work machine according to the present invention, the approximate tilling depth, that is, the tilling claw 26 relative to the tractor 1 can be adjusted by adjusting the tail wheel 28 described above.
After setting the relative position of the plowing depth, the plowing depth is adjusted in small steps by rotating the plowing depth adjustment handle 36a.

That is, from the state shown by the solid line in FIG.
If you want to increase the tillage depth by a minute amount by displacing it downward by a small amount, use the tillage depth adjustment handle 36.
When a is manually rotated by an appropriate amount in the direction A, the nut 37 is threaded by the rotation of the screw shaft 36, and the space between the pivot points 33 and 35 is slightly extended.
Therefore, each tilling adjustment plate 30 rotates each tilling working part 12 downward around the fixed beam 14, that is, the drive shaft 19, and the tilling claw 26 moves from the solid line position to the chain line position in FIG. Since the soil is moved downward by a small amount, the plowing depth becomes correspondingly deeper.

If you want to reduce the tilling depth by a small amount, turn the tilling depth adjustment handle 36a in the opposite direction, and use the same action as described above to move each tilling section 12 upward and move the drive shaft 19. All you have to do is turn it around.

That is, to adjust the tilling depth, most of the desired adjustment value is adjusted by moving the tail wheel 28 up and down by rotating the tail wheel adjustment handle 56a. and the distance between the tilling claws 26,
In other words, the height of the tailwheel 28 with respect to the tilling claws 26 is set]. Thereafter, the tilling depth adjustment handle 36a is rotated to move the entire tilling section 12 up and down minutely to adjust the tilling depth. In addition, when adjusting the soil, it is thought that the tail wheel 28 also moves up and down along with the tilling claws 26 due to the vertical movement of the entire tilling work section 12, but the tail wheel 28 is in contact with the ground and the tilling work section 12 is It is supported by the rear wheel 2 and the tail wheel 28, and the drive shaft 19 [transmission shaft 44, connecting shaft cylinder 4]
5], only the tilling claws 26 can be moved up and down in small steps as the distance between the pivot points 33 and 35 is shortened or extended by rotating the tilling depth adjustment handle 36a. [The tail wheel 28 moves slightly in the longitudinal direction, but its vertical position does not change because it is in contact with the ground].

The tilling depth adjustment performed in the above manner changes and adjusts the relative height position of the tilling claws 26 with respect to the tractor 1, regardless of the relative height position of the tail wheel 28 with respect to the tractor 1. Even an unskilled worker can reliably and accurately adjust the plowing depth. In the above embodiment, if the plowing depth adjustment handle 36a is placed within the reach of the operator from the driver's seat 3,
The operator can adjust the plowing depth while seated without getting off the driver's seat 3, which is very convenient especially when it is necessary to adjust the plowing depth during plowing work.

In addition, since the tilling work machine according to the present invention is configured such that each tilling work section 12 can be rotated around the drive shaft 19, the rotation fulcrum of the tillage work section 12 is aligned with the axis of the drive shaft 19. Since it is not in a position where it is biased from the center, it can also be used when each tilling work part 12 is rotated and displaced, and when a load is applied to the tilling claws 26 and a rotation moment is applied to each tillage work part 12 around its rotation fulcrum. This has the advantage of structural strength in that no bending moment acts on the drive shaft 19 itself.

Furthermore, by making each tilling work part 12 rotatable around the drive shaft 19, when each tillage work part 12 is rotated, the drive shaft 19 and therefore the three-point support mechanism 7, 7, and 9 of the tractor 1 are rotated. Since the gear box 13 and both fixed beams 14 are held in a fixed position by being connected to
Even if 2 is configured to be rotatable, the disadvantage that the means for connecting the three-point support mechanisms 7, 7 and 9 and the tilling machine 11 becomes more complicated cannot arise with this. Moreover, as in the above embodiment, each fixed beam 14 and adjustment beam 23 serve as a support mechanism and rotation support mechanism for each tilling work section 12, and a cover mechanism for the drive shaft 19 and transmission shaft 44. Therefore, the structure of the tilling machine 11 can be simplified accordingly.

Further, in the above embodiment, each support frame 27 is
Since the structure is configured such that its posture can be changed and adjusted, when an attachment (not shown) such as a doubling plate is attached to the support frame 27 to perform ridge raising work, etc., the operating posture of the attachment can be adjusted. It is also extremely advantageous for work as it can be changed and adjusted.

Furthermore, in the above embodiment, both tilling sections 1
Since the spacing between the ridges 2 and 12 can be changed and adjusted by each adjustment bolt 43, it is convenient to change and adjust the ridge width as appropriate during the ridge raising work.

In addition, in the above embodiment, the tilling machine 11
A pair of tilling work sections 12, 12 in parallel is provided so that ridge raising work can also be performed, and both tillage work sections 1
2 and 12 are configured to rotate around the drive shaft 19 by the same amount at the same time, but in other embodiments, the tilling work machine 11 may be configured to include one tilling section 12. , and both tillage work section 1
The tillage working machine 11 may be configured so that the rotational displacement of the rotary sections 2 and 12 can be adjusted independently (none of them are shown), and of course such a configuration is easily possible. be. Particularly, the latter configuration has the advantage that plowing and ridge-raising operations can be performed satisfactorily even on slopes.

As another embodiment, as shown in FIGS. 8 and 9, each tilling depth adjusting plate 30 in the previous embodiment is eliminated, and each tilling work section 12, that is, each support frame 2
7 and the connecting rod 29, springs 61 and 6 are attached to a connecting short tube 60 that can be slidably inserted into the connecting rod 29.
The connecting rod 29 is connected to both fixed beams 14, 14 by a pair of supporting rods 62 which are supported to be elastically movable up and down.
3 and 63, are pivotally connected so as to be movable up and down,
The tilling work machine 11 may also be configured. In addition, in the figure, 60 is a fixing bolt for arbitrarily positioning each connecting short tube 60.

With the above configuration, it goes without saying that the same effects as those of the previous embodiment can be achieved, but furthermore, when a load of a certain level or more is applied to each tilling claw 26, each tilling working part 12 Since it is raised and rotated against the biasing force of the spring 61 in order to offset the load, it is advantageous that the tilling work can be performed satisfactorily even on uneven surfaces.

In the present invention, the connecting arm 15 connected to the three-point support mechanism of the tractor is erected from the gearbox 13, and the supporting plate 31 of the connecting arm 15 is integrated.
Since the tilling depth adjustment device is interposed between the tiller and the connecting rod 29 which is pivotally supported at a predetermined interval on the tilling machine 11 side, it is possible to directly change the relative height of the tilling claw with respect to the tractor. The plowing depth can be adjusted by adjusting the plowing depth, and small plowing depth adjustments can be made reliably and accurately, and the plowing depth can always be properly adjusted.

In addition, by installing the adjusting beam 23 loosely on the fixed beam 14 and fixing the transmission case 24 of the tilling machine 11 on the adjusting beam 23, the tilling machine 11 can be freely moved in the width direction of the body, and the tilling machine can be used in various ways. Although it increases the versatility as an agricultural work machine,
The plowing section, which is movable in the widthwise direction of the machine body, is firmly supported and its movement in the widthwise direction of the machine body is facilitated. That is, even if a load is applied to the tilling claws 26 and a rotational moment about the rotational fulcrum is applied to each tilling working part 11, the fixed beam 14, the adjustment beam 23, the connecting rod 29, and the tilling depth adjuster can This load is received by the supporting structure, and the tilling work part can be held firmly without the need for special members.

[Brief explanation of the drawing]

Figure 1 is a side view showing the tillage implement according to the present invention connected to a tractor, Figure 2 is a plan view of the same, and Figure 3 is a longitudinal sectional view of the same essential parts showing the drive system (the cross section is ), Figure 4 is a sectional view taken along the line - in Figure 1, and Figure 5 is a cross-sectional view along the line - in Figure 1.
A line sectional view, FIG. 6 is a - line sectional view of FIG.
FIG. 7 is a sectional view taken along the - line in FIG. 3, FIG. 8 is a side view corresponding to FIG. 1 showing another embodiment, and FIG.
The figure is a plan view of the same. . 1...Tractor, 4...Power take-off shaft, 11...
... Tilling work machine, 12 ... Tilling work section, 19 ... Drive shaft.

Claims (1)

[Scope of utility model registration request] Fixed beam 14 protruding from gearbox 13
In a tilling work machine in which an adjustment beam 23 is loosely installed at the adjustment beam and a transmission case 24 is fixed to the adjustment beam, the support plate 31 integrated with the connecting arm rod 15 erected on the gear box 13 and the transmission case 24 of the tillage work section 11 are provided. A tilling work machine characterized in that a plowing depth adjusting device is interposed between a connecting rod 29 and a connecting rod 29 which is pivotally supported at a position spaced apart from the plowing machine.