JP2017085979A - Rotary tiller - Google Patents

Abstract

A rotary tiller having a structure that can prevent soil from adhering to a rotary cover with a simple structure.
A rotary cover 7 is pivotally supported at a front end thereof so as to be rotatable up and down with respect to a frame 2, and a rear end side thereof is urged downward by a spring 76, so that the rotary cover 7 has a rotary tiller 6 side. An elastic plate 70 which is a soil adhesion preventing body is attached to the surface side, and the elastic plate 70 is attached to the frame 2 side at the front end and the rear side, and attached to the rotary cover 7 at the intermediate portion. In the meantime, the rotary tiller is characterized in that it is inflated and attached to the rotary tiller 6 side.
[Selection] Figure 3

Description

  The present invention relates to a rotary tiller that is a farm working machine that is mounted on a tractor and that rotates and rotates a rotary tiller that is provided with a plurality of tilling claws. Specifically, the present invention relates to a structure that prevents the cultivation soil from adhering to the inner surface of the rotary cover that covers the upper side of the rotary tillage body.

  The rotary tiller performs tillage by rotating a rotary tiller shaft, which is provided with a plurality of tillage claws, in the left-right direction, with the left and right ends thereof being rotatably supported by a frame. At this time, a rotary cover that covers the upper portion of the rotary tiller is provided so that the tilling soil that the tilling claws bounce up does not scatter upward. A part of the cultivated soil that has jumped up adheres to the inner peripheral surface of the rotary cover and enlarges, and eventually becomes a rotational resistance of the cultivating claw that rotates, causing a power loss. For this reason, the thing of the structure which provided the elastic material etc. in the internal peripheral surface is known in order to prevent the adhesion and enlargement of the soil to a rotary cover internal peripheral surface. For example, Japanese Utility Model Publication No. 2-44901 and Japanese Patent Application Laid-Open No. 2010-284106 are known.

Japanese Utility Model Publication No. 2-44901 JP 2010-284106 A

  The “rotary tiller cover device” disclosed in Patent Document 1 is provided with a “flexible cover body 19 on the inner surface side of the main cover 20 and a cover body 19 in conjunction with the rotation of the rear cover 21 about the horizontal axis”. Is a cover device for a rotary tiller characterized in that the cover body 19 and the rear cover 21 are coupled by an interlocking mechanism 51 so that the cover body 19 can be stretched and loosened. In the case of Patent Document 1, the cover body 19 is extended and loosened by interlocking mechanism 51 so as to be interlocked with the rotation of the rear cover 21 to prevent the attachment of soil. Since the body 19 is repeatedly stretched and relaxed in the length direction, there is a problem in durability.

  The “agricultural working machine” of Patent Document 2 includes “an elastic plate that covers the upper part of the tillage body, and a support that partially supports the lower surface of the elastic plate, and at least a part of the elastic plate is: Agricultural working machine that is movable relative to the support, which suppresses breakage of the elastic plate due to the biting of foreign matter such as stones, and the elastic plate can slide on the support in the front-rear direction. It is the thing of composition which becomes.

  An object of the present invention is to provide a rotary tiller having a structure that can prevent soil from adhering to the rotary cover with a simple structure.

In order to solve the above-described problem, a rotary tiller according to claim 1 includes a frame provided with a mounting portion to be attached to a tractor, a rotary tiller provided rotatably on the frame, and an upper side of the rotary tiller. A rotary tiller provided with a rotary cover provided at a position and a leveling plate pivotally supported on the rear side of the rotary tiller so as to be rotatable up and down;
The rotary cover is pivotally supported so that the front end thereof is rotatable up and down with respect to the frame, the rear end side is biased downward by a spring, and is a soil adhesion preventing body on the surface side of the rotary cover on the rotary tiller side. An elastic plate is affixed, the elastic plate is attached to the frame at the front end and the rear side, the intermediate part is attached to the rotary cover, and between each attachment part is inflated and attached to the rotary tiller side It is the rotary tiller characterized by being.

  The rotary tiller according to claim 2 is characterized in that the rear side of the elastic plate is attached to the frame and is cantilevered to the leveling plate side. This is a rotary tillage device.

  According to this invention, the rotary cover is rotated by the structure in which the front end of the rotary cover is pivotally supported with respect to the frame so as to be pivotable up and down and the rear end side is biased downward by the spring. Cultivated soil scatters on the rotary cover, and the rotary cover constantly vibrates to suppress the attachment of the cultivated soil. In addition, since the elastic plate is attached with a bulge in an arc shape, the elastic plate itself is also vibrated and deformed, and has the effect of suppressing soil adhesion.

It is a perspective view from the front left of the advancing direction of the rotary tiller of the Example of this invention. It is a left side view in the advancing direction of the rotary tiller of the embodiment of the present invention. It is a left side cross-sectional view of the traveling direction of the rotary tiller according to the embodiment of the present invention. It is a left side sectional view of the direction of movement at the time of work of the rotary tiller of the example of the present invention. It is a left side sectional view of the direction of movement at the time of work of the rotary tiller of the example of the present invention.

  One embodiment will be described with reference to FIGS. 1 is a perspective view of the rotary tiller of the embodiment of the present invention from the left front direction, FIG. 2 is a left side view of the rotary tiller of the embodiment of the present invention, and FIG. 3 is an embodiment of the present invention. 4 is a cross-sectional view of the rotary tiller in the advancing direction, FIG. 4 is a cross-sectional view of the left side of the advancing direction of the rotary tiller in the embodiment of the present invention, and FIG. It is a cross-sectional view of the left side of the traveling direction, and shows a state where the rear end side of the rotary cover is rotated upward. A three-point link mechanism, which is a lifting link, is provided at the rear of a tractor (not shown) that is a traveling work vehicle, and is connected to the mounting portion 8 at the front part of the frame 2 of the rotary tilling device. They are freely connected and driven by power output from the tractor side. In the description, the left side shown in FIG. 2 will be described as the front side in the traveling direction, and the right side will be described as the rear side in the traveling direction.

  The mounting portion 8 is provided at the front center portion of the rotary tiller, and includes a top link pin 81 at the upper center and a pair of lower link pins 80 positioned on the left and right sides below the top link pin 81. A top link and a lower link (not shown) are connected to the tractor.

  An input case 1 is provided at the center of the front mounting portion 8, and an input shaft 10 protrudes forward. The input shaft 10 is connected to an output shaft (not shown) of the tractor through a universal joint or the like, and receives power from the tractor. A top mast 23 is fixed to the upper surface of the input case 1, and the top link pin 81 is provided at the upper end portion.

  A pipe frame 21 composed of a round pipe that integrally protrudes from the input case 1 to the left and right sides and constitutes a part of the frame 2 is provided, and the pipe frame 21 on one of the left and right sides (right side in FIG. 1) A vertical transmission case 5 extending downward from the projecting end, and a vertical support frame 22 and pipe frame 21 extending downward from the projecting end of the left and right pipe frame 21. A front frame 24 provided in parallel to the front portion constitutes the entire frame portion, and the rotor shaft 60 in the left-right direction is rotatably supported between the lower end portion of the transmission case 5 and the lower end portion of the support frame 22. doing.

  A large number of tilling claws 61 are attached to the rotor shaft 60 at regular intervals in the radial direction to constitute the rotary tilling body 6. The upper part of the rotary tiller 6 is covered with a rotary cover 7 to prevent the soil cultivated by the rotary tiller 6 from being scattered upward and to assist the performance of crushed soil and leveling. A ground leveling plate 4 whose front end is connected to the frame 2 side so as to be rotatable in the vertical direction is located at the rear of the rotary tiller 6 and receives the scattering of soil cultivated by the rotary tiller 6 and behind the leveling plate 4. Leveling is performed by the section.

  Gauge wheels 20 held by the front frame 24 are provided on the outer side portions of the pair of left and right lower link pins 80, respectively. The gauge wheel 20 adjusts the tilling depth of the rotary tiller 6 by adjusting the height of the wheel part that contacts and rotates on the ground surface to be tilled. To adjust the height, slide the holder part with the vertical bar arm holding the wheel fixed to the front frame 24 up and down, select the holder part and a plurality of fixing holes on the arm and select the fixing pin. Insert and adjust the height.

  The power input from the input shaft 10 of the input case 1 is decelerated by a gear built in the input case 1 and output through a pipe frame 21 (right side in FIG. 1) projecting to the left and right sides. It is transmitted into the transmission case 5 by the shaft 11. An output sprocket (not shown) is fixed to the end of the output shaft 11 in the transmission case 5, and between the rotor shaft sprocket (not shown) at the end of the rotor shaft 60 supported by the lower end of the transmission case 5. Power is transmitted by a roller chain (not shown) wound around the rotor shaft 60, and the rotor shaft 60 is rotationally driven.

  A support portion of the rotor shaft 60 of the transmission case 5 is rotatably supported by a bearing and is lubricated by lubricating oil stored in the transmission case 5. An oil supply port is provided in the upper part of the transmission case 5, and the roller chain and the bearing are lubricated by the supplied lubricating oil.

  The support portion on the support frame 3 side of the rotor shaft 60 is rotatably supported by a bearing held by the support frame 3 via a bearing retainer (not shown) attached to the support frame 3 with bolts and nuts. Yes.

  FIG. 4 is a cross-sectional view of the working example of the embodiment as viewed from the left side in the traveling direction of the rotary tiller 6 part, and shows a state in which the leveling plate 4 is rotated upward by the tilling soil. FIG. 3 is a cross-sectional view as seen from the left side of the traveling direction during non-working, and shows a state in which the leveling plate 4 hangs downward. In this example, the rotary tiller 6 is rotated counterclockwise in the state of FIG. 4 so that the front side which is uncultivated land is cut down. A rotary cover 7 is provided at an upper portion of the rotary tiller 6 so as to be separated from the rotary outer peripheral end of the tillage claw 61. The rotary cover 7 is formed of a thin steel plate, and a front end portion is connected to the frame 2 via a hinge 75 so as to be rotatable up and down. Further, the rotating end on the rear end side is urged toward the rotary tiller 6 by a spring 76. The rotary cover 7 is attached by a front frame 25 and a hinge 75 that are spanned between the transmission case 5 and the support frame 3, and is urged and held by a spring 76 on the rear frame 26 that is also spanned. The spring 76 is guided by a spring guide pin 77 provided upright on the rear frame 26 and guides the rotation of the rotary cover 7 through a guide hole provided in the rotary cover 7. With this structure, the entire structure is easy to vibrate due to the collision of the tilled soil scattered from the rotary tiller 6 side.

  On the rear side of the rotary cover 7 is located a leveling plate 4 whose front end is connected to the frame 2 side so as to be vertically rotatable by a leveling plate rotation shaft 41 provided in the horizontal direction. In addition to receiving the scattering of the soil cultivated by, the leveling is performed by the rear portion of the leveling plate 4. A compression rod 40 is stretched between the outer upper surface of the leveling plate 4 and the pipe frame 21 on the front side of the frame 2, and the pressing force of the spring provided on the compression rod 40 is adjusted to adjust the leveling plate 4. The pressing force can be adjusted.

  An elastic plate 70 for preventing soil adhesion is attached to the surface of the rotary cover 7 on the rotary tiller 6 side. The elastic plate 70 is made of a plate material such as an elastically deformable synthetic rubber that is less likely to adhere to soil than an iron plate or the like. The front end is fixed and held to the front frame 25 holding the front end side of the rotary cover 7 by an elastic plate front mounting screw 71. The rear end side is fixed and held on the rear frame 26 by an elastic plate rear mounting screw 72. Further, the intermediate portion between the front end side and the rear end side is fixed and held at a plurality of locations on the rotary cover 7 by elastic plate intermediate mounting screws 73. In addition, between each said attachment screw, the elastic board 70 is bulged and attached to the rotary tiller side. For this reason, the bulging part deform | transforms and vibrates by the collision of the cultivation soil scattered from the rotary cultivation body 6 side, and attachment of cultivation soil is suppressed. In addition, since the rotary cover 7 itself that holds the middle portion of the elastic plate 70 can also vibrate, it has a structure in which the cultivated soil is less likely to adhere due to a synergistic effect.

  FIG. 5 shows a state in which the rotary cover 7 is rotated upward against the urging force of the spring 76, and the gap with the rotary tiller 6 is large. For this reason, when a stone or a foreign object tries to bite between the rotary cover 7 and the rotary tiller 6, the rotary cover 7 can escape to prevent biting.

  The rear side of the elastic plate 70 fixed and held by the elastic plate rear mounting screw 72 is extended in a cantilevered manner on the leveling plate 4 side to form an elastic plate extension 74. The cultivated soil to be attached to the leveling plate 4 is not attached by the elastic plate extension 74 of the elastic plate 70 by the elastic plate extension 74, and the cultivated soil attached to the elastic plate extension 74 is held in a cantilever shape. The elastic plate extension 74 is wiped off by vibration or deformation. In the portion where the elastic plate 70 on the rear end side of the leveling plate 4 does not reach, the cultivated soil is slid so that the cultivated soil is not attached.

  Because of this simple structure, soil cultivated by the rotary tiller 6 scatters on the rotary cover 7 located on the top and the ground leveling plate 4 on the upper side during the work, but the vibrating rotary cover 7 and elastic plate 70 cause vibration. Adhesion is prevented, and the attached soil does not increase the rotational resistance of the rotary tiller 6 and cause power loss.

  The present invention can be applied to a rotary tiller that is mounted behind a traveling machine such as a tractor and performs a tilling operation.

DESCRIPTION OF SYMBOLS 1 Input case 10 Input shaft 11 Output shaft 2 Frame 20 Gauge wheel 21 Pipe frame 22 Support frame 23 Top mast 24 Front frame 25 Front side frame 26 Back side frame 4 Leveling plate 40 Compression rod 41 Leveling plate rotating shaft 5 Transmission case 6 Rotary plowing body 60 Rotor shaft 61 Tillage claw 7 Rotary cover 70 Elastic plate 71 Elastic plate front mounting screw 72 Elastic plate rear mounting screw 73 Elastic plate intermediate mounting screw 74 Elastic plate extension part 75 Hinge 76 Spring 77 Spring guide pin 8 Mounting part 80 Lower link pin 81 Top link pin

Claims (2)

A frame provided with a mounting portion to be mounted on the tractor;
A rotary tiller rotatably provided on the frame;
A rotary cover provided above the rotary tillage body;
A leveling plate pivotally supported on the rear side of the rotary tillage body so as to be rotatable up and down;
In the rotary tiller with
The rotary cover is pivotally supported so that the front end thereof is rotatable up and down with respect to the frame, the rear end side is biased downward by a spring, and is a soil adhesion preventing body on the surface side of the rotary cover on the rotary tiller side. An elastic plate is attached,
The elastic plate has a front end and a rear side attached to the frame, and an intermediate part attached to the rotary cover.
A rotary cultivating apparatus characterized in that a space between the mounting portions is inflated and attached to the rotary cultivating body side in an arc shape.   2. The rotary tiller according to claim 1, wherein a rear side of the elastic plate is attached to the frame and is extended in a cantilevered manner to the leveling plate side.

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