JP6516655B2 - Rotary tiller - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a farming machine that is mounted on a tractor and used, and relates to a rotary cultivating apparatus that rotates and cultivates a rotary cultivating body provided with a plurality of cultivating claws. More specifically, the present invention relates to a structure for preventing the adhesion of cultivation soil to the inner surface of a rotary cover that covers the upper side of the rotary cultivation body.

  The rotary cultivating apparatus performs plowing by holding a left and right end portions of a long rotary cultivating shaft provided with a plurality of cultivating claws on a frame so as to be rotatable. Under the present circumstances, the rotary cover which covers the upper part of a rotary tillage body is provided so that the tillage which a tilling nail bounces may not scatter upwards. A part of the picked up cultivation soil adheres to the inner peripheral surface of the rotary cover and enlarges, and eventually becomes rotation resistance of the rotating cultivation tiller and generates a power loss. For this reason, in order to prevent adhesion of soil on the inner peripheral surface of the rotary cover and enlargement, an elastic material or the like is provided on the inner peripheral surface. For example, JP-A-2-44901 and JP-A-2010-284106 are known.

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

  In the "cover device of the rotary cultivator" of Patent Document 1, "the flexible cover 19 is provided on the inner surface side of the main cover 20, and the cover 19 is interlocked with the rotation of the rear cover 21 about the horizontal axis. The cover device of the rotary cultivator is characterized in that the cover body 19 and the rear cover 21 are connected by an interlocking mechanism 51 so as to be able to extend and relax. In the case of Patent Document 1, the interlocking mechanism 51 is connected to interlock with the rotation of the rear cover 21 to extend and relax the cover body 19 to prevent adhesion of the soil, but the structure is complicated, the cover There is a problem with durability because the body 19 is repeatedly stretched and relaxed in the longitudinal direction.

  The "agriculture work machine" of Patent Document 2 includes "an elastic plate covering an upper portion of the tillage body, ... a support partially supporting the lower surface of the elastic plate, and at least a portion of the elastic plate is It is an agricultural work machine that is movable with respect to the support, which suppresses damage to the elastic plate due to biting of foreign matter such as stones, and the elastic plate can slide on the support in the front-rear direction. It is a thing of the structure which becomes.

  An object of the present invention is to provide a rotary cultivating apparatus having a structure that can prevent the adhesion of soil to a rotary cover with a simple structure.

In order to solve the above problems, a rotary cultivating apparatus according to claim 1 comprises a frame provided with a mounting portion to be mounted on a tractor, a rotary cultivating body rotatably provided on the frame, and an upper portion of the rotary cultivating body. A rotary cultivator provided with a rotary cover positioned at the rear of the rotary cultivating body and a leveling plate pivotally supported at the rear of the rotary
The front end of the rotary cover is pivotally supported on the frame so as to be vertically pivotable, the rear end side thereof is biased downward by a spring, and a soil adhesion preventing body is provided on the side of the rotary cover on the rotary tillage side. The elastic plate is attached, the elastic plate is attached to the frame at the front end and the rear side, the middle part is attached to the rotary cover, and the attachment parts are attached to the rotary tiller side by expanding in an arc shape. It is a rotary tilling device characterized by

  Further, the rotary cultivating apparatus according to claim 2 is characterized in that the rear side of the elastic plate is attached to the frame and is extended in a cantilever shape on the side of the ground leveling plate. Rotary tilling equipment.

  According to the present invention, the front end of the rotary cover is pivotally supported on the frame so as to be vertically pivotable, and the rear end side is biased downward by the spring during the tilling operation in which the rotary tiller is rotated. The tillage soil scatters on the rotary cover, and the rotary cover always vibrates to suppress the attachment of the tillage soil. In addition, since the elastic plate is attached in a circular arc shape, the elastic plate itself also has an effect that vibration and deformation occur to suppress the attachment of the soil.

It is a perspective view from the advancing direction left front of the rotary tilling device of the example of the present invention. It is a advancing direction left view of the rotary tilling apparatus of the Example of this invention. It is advancing direction left side sectional drawing of the rotary tilling apparatus of the Example of this invention. It is advancing direction left side sectional drawing at the time of operation | work of the rotary tilling apparatus of the Example of this invention. It is advancing direction left side sectional drawing at the time of operation | work of the rotary tilling apparatus of the Example of this invention.

  One embodiment will be described based on FIGS. 1 to 5. FIG. 1 is a perspective view from the left front of the advancing direction of a rotary cultivating apparatus according to an embodiment of the present invention, FIG. 2 is a left side view of the advancing direction of a rotary cultivating apparatus according to an embodiment of the present invention FIG. 4 is a cross-sectional view in the direction of travel of the rotary tilling apparatus of the embodiment of the present invention, and FIG. 5 is a view of the embodiment of the rotary cultivating apparatus of the present invention. It is the advancing direction left side surface sectional view, and is a state where the rotary cover rear end side rotated upward. A three-point link mechanism, which is a lifting link, is provided at the rear of a tractor (not shown), which is a traveling working vehicle, and is connected to the mounting portion 8 of the front portion of the frame 2 of the rotary tiller. It is freely connected and driven by the 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 central portion of the rotary cultivating device, and is constituted by a top link pin 81 at the upper center and a pair of lower link pins 80 located below and to the right thereof. It connects with the top link and lower link (not shown), respectively, and is mounted on a tractor.

  An input case 1 is provided at the center of the front mounting portion 8 and an input shaft 10 is provided to project forward. The input shaft 10 is connected to an output shaft (not shown) of a tractor by a universal joint or the like, and the power on the tractor side is input. 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.

  A pipe frame 21 constituted by a round pipe which integrally protrudes from the input case 1 to the left and right sides respectively and constitutes a part of the frame 2 is provided, and the pipe frame 21 of one of the left and right sides (right side in FIG. 1) A transmission case 5 in the vertical direction extending downward from the projecting end, and a support frame 22 and a pipe frame 21 extending downward from the projecting end of the pipe frame 21 on the other side. The entire frame portion is configured by the front frame 24 provided in parallel to the front portion, and the horizontal support shaft 60 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 cultivating claws 61 are attached to the rotor shaft 60 radially at a constant interval to constitute a rotary cultivating body 6. The upper portion of the rotary cultivating body 6 is covered by a rotary cover 7 to prevent the upward scattering of the soil cultivated by the rotary cultivating body 6 and assist in the performance of the soil crushing and the soil leveling. A ground leveling plate 4 is connected to the frame 2 side at the rear portion of the rotary cultivating body 6, and the ground end plate 4 is rotatably connected to the front end in the vertical direction. Land preparation is carried out by the department.

  A gauge wheel 20 held by a front frame 24 is provided on the outer side of the pair of left and right lower link pins 80. The gauge wheel 20 adjusts the height of the rotating wheel unit in contact with the ground surface to be cultivated and adjusts the tilling depth of the rotary tiller 6. To adjust the height, slide up and down the holder unit in which the flat bar-like arm holding the wheel is fixed to the front frame 24 up and down, select a plurality of fixing holes provided in the holder unit and the arm, and fix the fixing pin Insert and adjust the height.

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

  The 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 at the upper portion of the transmission case 5, and the roller chain and bearings 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 the bearing held by the support frame 3 via a bearing retainer (not shown) attached to the support frame 3 with a bolt and a nut or the like. There is.

  FIG. 4 is a cross-sectional view of the working state of the embodiment viewed from the left side in the advancing direction of the rotary cultivating body 6 and shows a state in which the ground leveling plate 4 is rotated upward by the cultivating soil. Moreover, FIG. 3 is sectional drawing seen from the advancing direction left side at the time of non-operation, It is the state which the leveling board 4 hung down below. In this example, the rotary tillage body 6 is turned left in the state of FIG. 4 so that the front side which is the uncultivated area is downcut. A rotary cover 7 is provided on the upper portion of the rotary cultivating body 6 so as to be separated along the rotation outer peripheral end of the cultivating claw 61. The rotary cover 7 is formed of a thin steel plate, and the front end portion thereof is connected to the frame 2 through a hinge 75 so as to be pivotable 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 to the transmission case 5 side and the support frame 3 side by a front side frame 25 and a hinge 75, and is biased and held by a spring 76 on a rear side frame 26 similarly extended. The spring 76 is guided by a spring guide pin 77 erected on the rear side frame 26 and guides the rotation of the rotary cover 7 by a guide hole provided on the rotary cover 7. By this structure, the whole is easily vibrated by the collision of the cultivated soil which is scattered from the rotary cultivating body 6 side.

  On the rear side of the rotary cover 7, the ground leveling plate 4 in which the front end is rotatably connected in the vertical direction by the ground leveling plate turning shaft 41 provided horizontally on the frame 2 side is positioned. While receiving the scattering of the plowed soil and leveling is performed by the rear portion of the leveling plate 4. The compression rod 40 is bridged over the outer upper surface of the ground plate 4 and the pipe frame 21 on the frame 2 side on the front side of the ground plate 4, and by adjusting the pressing force of the spring provided on the compression rod 40 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 which is relatively less likely to adhere to soil than an iron plate or the like. The front end is fixed and held by the elastic plate front attachment screw 71 to the front side frame 25 holding the front end side of the rotary cover 7. The rear end side is fixed and held by the elastic plate rear attachment screw 72 to the rear side frame 26. Further, an intermediate portion between the front end side and the rear end side is fixed and held at a plurality of places on the rotary cover 7 by an elastic plate intermediate mounting screw 73. The elastic plate 70 is mounted on the rotary tiller side in an arc-like manner between the mounting screws. For this reason, the bulging portion is deformed or vibrated by the collision of the cultivated soil scattered from the rotary cultivating body 6 side, and the attachment of the cultivated soil is suppressed. Further, since the rotary cover 7 itself in which the middle portion of the elastic plate 70 is held can also be vibrated, it has a structure in which the cultivated soil is less likely to be adhered by the synergetic effect.

  FIG. 5 shows a state in which the rotary cover 7 is pivoted upward against the biasing force of the spring 76, and the gap with the rotary tilling body 6 is large. For this reason, when a stone or a foreign object tries to bite between the rotary cover 7 and the rotary cultivating body 6, the rotary cover 7 can be escaped to prevent biting.

  The rear side fixedly held by the elastic plate rear attachment screw 72 of the elastic plate 70 is cantilevered on the side of the ground leveling plate 4 to form an elastic plate extension 74. The cultivating 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 cultivation soil attached to the elastic plate extension 74 is held in a cantilevered manner The elastic plate extension 74 is dispelled by vibration or deformation. Since the portion where the elastic plate 70 at the rear end side of the leveling plate 4 does not reach acts as a slippage of the cultivation soil, adhesion of the cultivation soil does not occur.

  Because of this simple structure, during the operation, the soil cultivated by the rotary cultivator 6 scatters on the rotary cover 7 and the ground leveling plate 4 located on the upper side, but the vibrating rotary cover 7 and elastic plate 70 The adhesion is prevented, and the adhering soil does not increase the rotational resistance of the rotary cultivating body 6 to generate a power loss.

  The present invention can be applied to a rotary tilling device mounted on the rear of a traveling machine such as a tractor and performing 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 rear side frame 4 grounding plate 40 compression rod 41 grounding plate rotation shaft 5 transmission case 6 Rotary tiller 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 middle mounting screw 74 Elastic plate extension 75 Hinge 76 Spring 77 Spring guide pin 8 Mounting portion 80 Lower link pin 81 Top link pin

Claims (2)

A frame provided with a mounting portion for mounting on a tractor;
A rotary cultivating body rotatably provided on the frame;
A rotary cover provided above the rotary cultivation body;
A leveling plate pivotally supported at the rear of the rotary cultivation body so as to be rotatable up and down;
In a rotary cultivator equipped with
The front end of the rotary cover is pivotally supported on the frame so as to be vertically pivotable, the rear end side thereof is biased downward by a spring, and a soil adhesion preventing body is provided on the side of the rotary cover on the rotary tillage side. The elastic plate is stuck,
The elastic plate is attached to the frame at the front end and the rear side, and to the rotary cover at the middle part,
A rotary tilling apparatus characterized in that each mounting portion is mounted in a circular arc shape on the side of the rotary tiller.   The rotary cultivating apparatus according to claim 1, characterized in that the rear side of the elastic plate is attached to the frame and extended in a cantilever shape on the side of the ground leveling plate.

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