JP3568648B2 - Rotary rear cover device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotary that is mounted on a rear side of an agricultural work vehicle so as to be able to ascend and descend through a link device, and that plows agricultural land, and more particularly to a rotary rear cover device.
[0002]
[Prior art]
Conventionally, a rear cover rotatably supported by a rear part of a rotary cover that covers a tilling claw shaft of a rotary that is mounted to be able to ascend and descend via a link device behind a traveling machine body is made of a curved steel plate. The composition is already known.
[0003]
[Problems to be solved by the invention]
The well-known rotary back cover made of iron plate is heavy, and located at the rearmost part of the traveling body, the balance between the front and rear of the traveling body becomes poor, momentum, balance weight in front of the traveling body However, the total weight of the traveling body and the rotary was increased, and traveling became difficult especially in wetlands.
[0004]
In addition, the steel plate has poor slippage of the soil, and when leveling the surface of the tilled soil at the tip of the rear cover, the surface soil is dragged toward the tip of the rear cover, making it difficult to achieve a flat finish. Was. Further, the tilling soil adhered to the front of the rear cover much, the weight of the rear cover further increased, and the balance between the front and rear of the traveling machine body was deteriorated, so that the tilling performance could not be sufficiently exhibited.
[0005]
Accordingly, an object of the present invention is to improve the tilling performance by forming the rear cover of the rotary with a synthetic resin, reducing the weight, reducing the adhesion of tilling soil, and leveling the surface of the soil after tilling. .
[0006]
[Means for Solving the Problems]
The present invention has been made in view of the above circumstances, and includes a rotary (3) attached to a rear of a traveling body (1) via a link device (2) so as to be able to move up and down , and the rotary (3) In a rear cover device of a rotary (3) having a rear cover (12) rotatably supported at the rear of a rotary cover (8) covering a cultivating claw shaft (6), the rear cover (12) is integrally formed. The rear cover (12) is formed of a resin member, and the rear cover (12) is formed in a bag shape having a closed cavity with a cross section. The rear surface of the rear cover (12) is substantially straight, and the front surface is directed forward and the side surfaces are formed. The above-mentioned problem was solved by forming the curved portion so that the middle portion (12c) is thicker than the upper portion (12a) and the lower tip portion (12b).
[0007]
(Action)
Based on the above structure, when the traveling body (1) performs the tilling operation with the rotary (3) mounted on the rear part while moving forward, a large number of tilling claws (7) disposed on the tilling claw shaft (6) allow The uncultivated land is plowed, and the plowed soil is bounced back vigorously and hits the front surface of the rotatably supported rear cover (12), accumulating and resisting. The rear cover (12) pivots upward by the component force of the curved cross section on the front surface and the forward force of the traveling body (1), and the plowed soil is leveled to the rear cover (12) tip (12b) and moved rearward. Escaped. At this time, the rear cover (12) is formed of a resin member and has a smooth curve from the front middle portion (12c) to the front end portion (12b). The surface can be finished evenly without dragging the soil by (12b).
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0009]
A rotary 3 is attached to the rear of the agricultural tractor 1 via a link device 2 so as to be able to move up and down. On the other hand, the power of the agricultural tractor 1 is transmitted from the PTO shaft 5 at the rear center of the transmission 4 to the gear case 3a on the rotary 3 side, and further drives the tilling claw shaft 6 via the transmission 3b. The cultivated land is tilled by rotating the arranged tilling claws 7.
[0010]
The rotary cover 8 covering the cultivating claw shaft 6 is fixed to the gear case 3a, and a plurality of rows of rollers 9 are fixed to the upper surface thereof, and is guided by the rollers 9 to form a circle along the upper surface of the rotary cover 8. An arc-shaped rotating frame 10 is slidably mounted back and forth.
[0011]
The rear end of the rotating frame 10 is connected by a square pipe 10a extending in the lateral direction, and a bracket 10b for suspending and holding the rear cover 12 via a pressure spring 13 is fixedly provided on the upper surface. Shafts 10c that rotatably support the upper end of the rear cover 12 are fixedly provided at the left and right ends of the lower portion of the square pipe 10a.
[0012]
The rear cover 12 is formed of an integrally molded resin member. As shown in FIGS. 3, 4, and 5, the rear cover 12 has a bag-like shape having a closed cavity, and has a substantially straight back surface. At the same time, the front surface is curved toward the front so that the middle portion 12c is thicker than the upper portion 12a and the lower tip portion 12b in side view.
[0013]
As shown in FIGS. 2 and 4, a fulcrum bracket 15 having pipes 15a at both ends of the upper end of the rear cover 12 is attached to the body of the rear cover 12 by bolts 16, as shown in FIGS.
[0014]
As shown in FIGS. 2 and 5, a flat portion is provided at two places on the left and right sides of the rear cover 12 at an intermediate portion on the rear side, and a bracket 18 having a U-shaped cross section is mounted from the front with a round screw 19 and a nut 20. The rear cover 12 is suspended by the rod 21 via the pressure spring 13 between the rear cover 12 and the bracket 10b. The width of the fulcrum bracket 15 is slightly shorter than the distance between the tips of the left and right shafts 10c. First, the pipe 15a is inserted into the facing shaft 10c from one end, and then the entire rear cover 12 is shifted toward the other end. At the stage where the pipe 15a 'facing the shaft 10c' at the other end is inserted and the right and left are fitted, when the bracket 10b and the bracket 18 are connected by the rod 21, the left and right positions of the entire rear cover 12 are fixed. , Are rotatably supported around the shafts 10c and 10c '.
[0015]
As shown in FIG. 2, the rear cover 12 is cut out in a substantially triangular shape from the middle portion to the tip portion so as not to be in the way when the cultivator is mounted. As shown in FIG. 6, a hollow triangular plate 23 having a cross section continuous with the cross sections of the left and right rear covers 12 is provided so as to prevent the plowed soil from scattering behind.
[0016]
As shown in FIG. 7, the joint between the cutout portion of the rear cover 12 and the hollow triangular plate 23 is overlapped on the inclined surface 23 a facing forward, and a screw hole 23 b provided on the back surface of the hollow triangular plate 23 is used. The mounting plate 25 is mounted by a screw 24, and is fixed to a screw hole 12 d provided on the rear surface of the rear cover 12 by a knob 26 via the mounting plate 25, and the front end is aligned with the main body of the rear cover 12.
[0017]
Also, as shown in FIG. 2, the left and right ends of the rear cover 12 are cut out in a substantially triangular shape from the front end to the middle part so as not to obstruct when the tail wheels are used. The covers 27, 27 'are overlapped on the back cut-out portion 12e provided at the cut end of the rear cover 12 and fixed by screws 28, and both ends and the tip are the same as the main body of the rear cover 12 so that the soil which has been made does not fly backward. Lined up.
[0018]
Next, the operation of the present embodiment will be described.
[0019]
Based on the above structure, when the agricultural tractor 1 performs the tilling operation with the rotary 3 mounted on the rear part while moving forward, the uncultivated land is tilled and plowed by the many tilling claws 7 arranged on the tilling claw shaft 6. The soil is bounced back vigorously, hits the front intermediate portion 12c of the rear cover 12 rotatably supported by the shaft 10c, and accumulates resistance, but the tip 12b below the intermediate portion 12c. The rear cover 12 pivots upward around the shaft 10c against the pressing force of the pressure spring 13 due to the component force of the curved cross section of the front surface and the forward force of the agricultural tractor 1 to tilled soil. It is released to the rear leveled to the distal end 12b of the rear cover 12.
[0020]
At this time, since the rear cover 12 is formed of a resin member and has a smooth curve from the front middle portion 12c to the front end portion 12b, there is no adhesion of soil on the front surface and no drag of the soil by the front end portion 12b. And the surface can be finished evenly.
[0021]
In addition, since the rear surface of the rear cover 12 is configured to be substantially straight or very slightly curved when viewed from the side, no soil is deposited on the rear surface.
[0022]
As described above, the knob 26 is loosened to remove the hollow triangular plate 23 when the cultivator is mounted, and the screws 28 are loosened to remove the covers 27 and 27 'when both tail wheels are used. The space between the cultivator and the two tail wheels is secured by keeping the minimum gap between the parts.
[0023]
Further, as shown in FIGS. 8, 9 and 10, the rear cover 30 is formed of a resin member having a uniform thickness with a curved shape curved forward from the middle portion 30c to the front end portion 30b in a side view. It is also possible to fix two right and left brackets 31 each having a U-shaped cross-section and opening upward connecting the upper part 30a and the tip part 30b.
[0024]
In the case of the present invention, the bracket 31 on one side has two bosses 31a and 31b facing upward as shown in FIG. 10, and the rear boss 31a serves as a lower fulcrum of the rod 21 for pressing. The front boss 31b serves as a lower fulcrum of the rod 32 for stabilizing the depth.
[0025]
The amount of rotation of the rear cover 30 due to the resistance of the cultivated soil is controlled by the rod 32, the link arm 33, the wire cable 34 connected to the other end of the link arm 33, and the link 35 provided on the agricultural tractor 1. The hydraulic pressure is controlled to make the resistance of the tilling soil constant, and stable tilling work can be performed.
[0026]
A metal fulcrum bracket 36 is fixed to the upper end of the rear cover 30 with a bolt 37 therebetween with a resin member interposed therebetween, and the rear cover 30 is suspended rotatably around the shaft 10c.
[0027]
Also, a metal U-shaped metal fitting 38 is provided on the distal end portion 30b of the rear cover 30 with a resin member interposed therebetween, so that both tail wheels provided on the left and right ends of the rear cover 30 are provided as shown in FIG. When the cover 39 is attached at the time of use, the guide rod 39a protruding from the cover 39 side is inserted into the U-shaped space of the tip metal fitting 38 on the rear cover 30 side, thereby securely fixing the rear cover 30 and the cover 39, The cover 39 can be attached and detached without using a tool only by fixing it with the knob 26 at one upper position.
[0028]
Also in the case of the present invention, the detachable triangular cover 40 and the cover 39 at the center portion and at the left and right ends are fixed to the rear cover 30 in the case of mounting the cultivator and both tail wheels, as in the present embodiment.
[0029]
【The invention's effect】
The present invention, in the rear of the vehicle body, comprising a vertically movable loaded rotary via a link device, the rear portion of the rotary cover covering the tilling claws axis of said rotary comprises a rotatably supported by the rear cover In a rotary rear cover device , the rear cover is formed of an integrally molded resin member, and the rear cover has a bag shape having a closed cavity with a cross section, and the rear surface of the rear cover is substantially linear, and the front surface is Because the front part is curved so that the middle part is thicker than the upper and lower parts when viewed from the side, the rear cover can be made lighter, and there is no adhesion of soil on the front, and the front part The surface could be finished evenly without dragging the soil, and the tilling performance could be improved.
[Brief description of the drawings]
FIG. 1 is a side view when a rotary is mounted in the present embodiment.
FIG. 2 is a rear view of the rear cover according to the embodiment.
FIG. 3 is a side view of FIG. 2;
FIG. 4 is a sectional view taken along the line AA of FIG. 2;
FIG. 5 is a sectional view taken along line BB of FIG. 2;
FIG. 6 is a sectional view taken along line CC of FIG. 2;
FIG. 7 is a sectional view taken along line DD of FIG. 2;
FIG. 8 is a side view when another rotary is mounted.
FIG. 9 is a rear view of another alternative rear cover.
FIG. 10 is a side view of FIG. 9;
FIG. 11 is a detailed rear view of FIG. 9;
[Explanation of symbols]
Reference Signs List 3 Rotary 7 Tilling claw 10 Rotating frame 12 Rear cover 13 Pressure spring 15 Support bracket 21 Rod 23 Hollow triangular plate 26 Knob 30 Rear cover 40 Triangular cover

Claims (1)

A rotary rear cover device having a rotary mounted on the rear side of the traveling body so as to be able to ascend and descend via a link device , and having a rear cover rotatably supported at the rear of a rotary cover covering a cultivating claw shaft of the rotary. At
The rear cover is formed of an integrally molded resin member,
The rear cover is formed in a bag shape having a closed cavity in its cross section,
While making the back of the rear cover almost straight,
The front surface is curved toward the front, so that the middle portion is thicker than the upper and lower tips in side view,
A rotary rear cover device, characterized in that:

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