JPS6219124Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a rear cover structure for a rotary work machine (auto-rotary work machine) having an automatic plowing depth control mechanism.

(b) Conventional technology Conventionally, auto-rotary work machines generally have
The vertical movement of the rear cover, which functions as a leveling plate for the cultivated soil, is fed back to the vertical movement of the lift arm installed on the tractor, and the tilling depth is adjusted while automatically raising and lowering the work equipment. Depending on the working conditions, the plowing depth may be adjusted by vertically adjusting the tail wheel without making the automatic plowing depth control mechanism function. For this reason, notches are formed on both sides of the tip of the rear cover to prevent the tail wheel from interfering with the rear cover when the tail wheel is used.
When this notch is formed, the width at the tip of the rear cover becomes narrower, and if automatic plowing depth control is performed without this, the leveling range of the rear cover with the notch becomes narrower. I had a problem with it being too narrow.

Therefore, Utility Model Application No. 52-145106, Utility Model Application Publication No. 53
As described in Japanese Utility Model Publication No. 98109, Japanese Utility Model Publication No. 55-27013, and Japanese Utility Model Publication No. 48-35686, a cover for covering the notch is
It was devised to attach it removably or to be able to adjust the horizontal slide.

(c) Problems to be solved by the invention However, among the above-mentioned structures, those in which the cover is detachable have a problem in that it is troublesome to attach and detach the cover and to manage the cover after it is removed.

In addition, if the cover is adjustable horizontally, the guide structure for horizontally sliding the cover becomes complicated, and the tip of the rear cover, which performs the tilling surface leveling function and the sensing function of the automatic plowing depth control mechanism, There is a problem in that strength cannot be ensured.

(d) Means for solving the problem Therefore, the present invention provides a rear cover whose tip that is in contact with the plowing surface performs the function of leveling the plowed surface, and an automatic plowing depth control mechanism that uses the rear cover as a sensor. In the rotary work machine equipped with the above-mentioned rotary work machine, a notch is formed on the left and right sides of the tip of the rear cover with a width that can avoid interference with the tail wheel that is attached as appropriate, and the top surface of the tip of the rear cover excluding the notch is formed on the left and right sides of the tip of the rear cover. A U-shaped folded part is formed on the side, and a guide groove is formed inside the folded part, and the cover is placed in an overlapping state on the upper surface of the rear cover in the guide groove, and at least the above-mentioned cutout part is formed in the guide groove. To provide a rear cover structure for a rotary working machine in which the rear edge of a cover that can be covered is slidably fitted in the left and right lateral directions, and the degree of opening and closing of a notch by the cover can be finely adjusted.

(E) Function/Effect When attaching a tail wheel to a rotary work machine, the notch can be opened as much as necessary by sliding the cover sideways inward along the guide groove. In addition, if the tail wheel is not installed, if the notch is completely covered with a covering cover, the covering cover, together with the tip of the rear cover, will function as a sensor for the automatic plowing depth control mechanism. .

At this time, since the guide groove is formed inside the folded part where the tip of the rear cover is folded back into a U-shape, there is no need to provide a separate member for guiding the covering cover, and the guide groove guides the folded part. The covered cover can be slid horizontally smoothly as a rail, and in order to improve the strength of the tip of the rear cover, the folded portion has a leveling function and an automatic plowing depth control mechanism. The sensing function is reliably fulfilled.

(F) Embodiment The embodiment of the present invention will be explained in detail based on the drawings.
It is a rotary work machine connected via a three-point linkage mechanism consisting of a top link 3 and a top link 3, which transmits power from the PTO shaft 4 of the tractor 1 to the tilling transmission section 5 provided at the front of the machine. By transmitting power from the cultivation part 5 to the tilling shaft 6 and rotating it, the tilling work is performed while rotating the tilling claws 7 erected on the tilling shaft 6.

Reference numeral 8 denotes a rotary cover, which is composed of side covers 9 provided on both left and right sides, an upper cover 10, and a rear cover 12 pivoted at the rear edge of the upper cover 10.
2 is made to function as a leveling plate for tilled soil during plowing work.

A hanger rod 13 is pivotally supported on the upper surface of the rear cover 12, and is tensilely supported in the vertical direction by springs 14, 14 between it and the fuselage frame a, thereby holding the rear cover 12 suspended in an inclined state.

Reference numeral 15 denotes an automatic plowing depth control mechanism of the rotary work machine A, and the vertical arm 1 provided on the upper surface of the rear cover 12
6 and a feedback link 17 provided on the tractor 1 are connected by a feedback wire 18, and the link 17 is interlocked with a hydraulic control valve (not shown) of the lift arm 19, By feeding back the vertical movement of the rear cover 12 to the vertical movement of the lift arm 19 via the wire 18, the link 17, and the hydraulic control valve, the plowing depth can be adjusted while raising and lowering the body of the rotary working machine A. ing.

Further, 20 is a tail wheel which is detachably attached to the rear end of the fuselage frame a. In order to prevent interference between the tail wheel 20 and the rear cover 12 when the tail wheel 20 is attached to the frame a, notches 21 are formed on the left and right sides of the tip of the rear cover 12. It is something.

At the tip of the rear cover 12 excluding the notches 21, 21, a U-shaped folded part 12a is formed on the upper surface side, and a guide groove 24 is formed inside the folded part 12a. The rear edges of the covering covers 22, 22, which are placed on the upper surface of the rear cover 12 and are capable of covering at least the notches 21, 21, are fitted into the groove 24 so as to be slidable in the left and right lateral directions. The degree of opening and closing of the notches 21, 21 by the covers 22, 22 can be finely adjusted. Note that 12' indicates the tip side of the rear cover 12.

In addition, since the covering cover 22 is placed and supported on the upper surface of the rear cover 12, the covering cover 22
2 can be slid on the rear cover 12 in a stable supported state, and the covering cover 22 can be prevented from sagging downward.

Note that 25 in the figure is a long hole formed in the longitudinal direction of the groove frame 23' on the upper side of the notch 21, and 26 is a long hole formed in the rear cover 12 to match this long hole 25. It is a hole. 27
is a retaining pin passed through both sides of the rear edge of the covering cover 22, and its upper and lower ends are connected to the elongated hole 25,
26, a receiving metal 28 is provided at its lower end, and a knob fitting 29 is provided at its upper end.
A compression spring 30 is fitted between the knob fitting 29 and the upper surface of the groove frame 23', and the urging force of the compression spring 30 causes the stop pin 27 to be
By fixing the cover 22, the sliding movement of the covering cover 22 is fixed.

Note that 31 is a flat washer that is fitted onto the retaining pin 27. Further, to fix the sliding movement of the covering cover 22, a fastening structure using bolts, nuts, etc. may be used.

Therefore, in plowing work using the tail wheel 20, the covering cover 22 is slid in the direction of the arrow m to avoid interference between the tail wheel 20 and both sides of the tip of the rear cover 12. 21,2
1 should be opened, and the other automatic tilling depth mechanism 15 should be opened.
When plowing is carried out while adjusting the plowing depth, there is no need to attach the tailwheel 20, so the problem of interference between the tailwheel 20 and the rear cover 12 does not occur. In this case, by sliding the covering cover 22 in the direction of the arrow n to close the notch 21, the notch 21 is closed and the leveling range provided by the rear cover 12 can be maintained wide. In addition, when sliding the covering cover 22, the retaining pin 2
By pressing the knob 29 of 7 to release the pressure contact state of the receiving plate 28 against the inner surface of the rear cover 12, the locking pin 27 is released and the covering cover 2 is released.
2 can be freely slid. On this occasion,
Since the tip of the rear cover is used for leveling the plowing surface, the wider the contact area of the tip with the plowing surface, the more the leveling function can be achieved over a wide range, and the above-mentioned plowing surface can be effectively Although it is possible to sufficiently secure the sensor function for depth control, in reality, since the soil around the ridges contains a particularly high amount of water, accurate sensing cannot be performed at these locations. Since it is better to avoid sensing at the edge of the furrow in order for the rear cover to contribute to accurate plowing depth control, the left and right sides of the tip of the rear cover near the edge of the furrow can be The above-mentioned problem can be completely solved by appropriately adjusting the covering cover so as to appropriately distance it from the edge of the ridge.

Moreover, by adjusting the above-mentioned cover, the rear cover tip width, in other words, the leveling width or the sensing width can be adjusted. By adapting the width of the tip of the rear cover, it is possible to prevent leveling leakage, etc., and also to effectively exhibit the leveling function or sensing function.

Furthermore, since the folded part formed at the tip of the rear cover functions as a guide rail for the covering cover, the covering cover can be slid sideways smoothly, and the folded part forms the tip of the rear cover. In order to improve this, it is possible to ensure the above-mentioned plowing surface leveling function and sensing function by the tip.

In addition, when attaching a tail wheel to a rotary work machine if necessary, the tail wheel should be placed as close to the rear cover as possible, and cutouts are provided on the left and right sides of the tip of the rear cover to avoid mutual interference. The tail wheel will function effectively if it is positioned in the same position as the tail wheel.In this case, if the covering cover is adjusted to be close to the tail wheel, the cover will function as a scraper. , it is possible to reliably prevent a reduction in the function of the tail wheel due to the adhesion of mud, etc. to the tail wheel.

As mentioned above, according to the present invention, the notch width of the notch formed on the left and right sides of the tip of the rear cover is
Since the cover can be adjusted as appropriate, the width of the tip of the rear cover can be adapted to field conditions such as soil quality, ridge shape depending on the type of crop, etc. Moreover, the folded edge formed at the tip of the rear cover This ensures smooth lateral sliding of the covering cover and the strength of the tip of the rear cover, and the tip of the rear cover has a function of leveling the tilled surface and a sensing function of the automatic plowing depth control mechanism. This has the effect of ensuring certainty.

[Brief explanation of the drawing]

FIG. 1 is an overall side view showing a rotary working machine according to an embodiment of the present invention, FIG. 2 is a plan view showing a cover, and FIG. 3 is a sectional view taken along the line shown in FIG. 2. A... Rotary work machine, 1... Tractor, 8...
...Rotary cover, 12...Rear cover, 12a
... Turned part, 20 ... Tail wheel, 21 ... Notch part,
22...Coating cover, 24...Guide groove.

Claims (1)

[Scope of Claim for Utility Model Registration] A rotary work machine equipped with a rear cover 12 whose tip part that is in contact with the tillage surface performs the function of leveling the tillage surface, and an automatic tillage depth control mechanism 15 whose rear cover 12 functions as a sensor. , Notches 21, 21 are formed on the left and right sides of the tip of the rear cover 12, and are wide enough to avoid interference with the tail wheels 20, 20 that are attached as appropriate.
A U-shaped folded part 12a is formed on the top side of the tip of the rear cover 12 except for parts 1 and 21, and a guide groove 24 is formed inside the folded part 12a.
is formed in the guide groove 24, and the rear cover 12 is inserted into the guide groove 24.
a covering cover 22 placed on the upper surface in a superimposed state and capable of covering at least the notches 21, 21;
The rear edge of 22 is slidably inserted in the left and right lateral directions, and the notch 2 formed by the covering covers 22, 22 is inserted.
A rear cover structure for a rotary work machine that allows fine adjustment of the degree of opening and closing of parts 1 and 21.