JP5618906B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine that can reduce a burden on an operator.

  Conventionally, for example, an agricultural machine described in Patent Document 1 is known.

  This conventional agricultural machine includes a machine body connected to a traveling vehicle such as a tractor, a transmission case body rotatably provided on the machine body, and a rotary shaft rotatably supported at a lower portion of the transmission case body. And a tiller body having a plurality of tillage claws attached to the rotating shaft, and a fixed cover body fixed to the transmission case body and covering the tiller body.

JP 2000-139102 A

  However, in the conventional agricultural machine described above, when soil adheres to the inner surface of the fixed cover body (opposite surface to the tillage body), the soil must be dropped manually by the operator. Is hard work for workers.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can reduce the burden on an operator.

  The agricultural machine according to claim 1 is an agricultural machine that is used by being connected to a traveling vehicle, the aircraft connected to the traveling vehicle, a transmission case body rotatably provided on the aircraft, A rotary shaft that is rotatably supported at a lower portion of the transmission case body, and a tiller body that has a plurality of tillage claws attached to the rotary shaft, and is rotatably provided on the transmission case body and covers the tillage body A rotating cover body, and the transmission case body rotates with respect to the machine body when the agricultural working machine is lifted to change from the working state to the non-working state, and the rotating cover body is the transmission case body. As a result, the distance between the rotating cover body and the tilling claw is reduced.

  The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein the agricultural machine is provided with a connecting body that is rotatably provided on the machine body and has a long hole portion formed therein, and the rotary cover body is provided at the long hole portion. The insertion shaft is inserted, and the insertion shaft is movable in the long hole portion in a working state, and the insertion shaft is in contact with the end of the long hole portion in a non-working state. It is what.

  The farm machine according to claim 3 is the farm machine according to claim 2, wherein when the farm machine is lifted to change from the working state to the non-working state, the connecting body pushes down the insertion shaft on the front end side of the rotating cover body. Accordingly, the rotating cover body rotates with respect to the transmission case body.

  According to the present invention, when the farm work machine is lifted and changes from the working state to the non-working state, the transmission case body rotates with respect to the machine body and the rotation cover body rotates with respect to the transmission case body, As a result, since the distance between the rotating cover body and the tilling nail is reduced, the soil attached to the rotating cover body can be dropped with the tilling nail, thereby reducing the burden on the operator.

It is a side view of the agricultural working machine which concerns on one embodiment of this invention. It is a front view of an agricultural working machine same as the above. It is a principal part side view at the time of the working state of an agricultural working machine same as the above. It is a principal part side view at the time of the non-working state of an agricultural working machine same as the above. It is operation | movement explanatory drawing of a farm work machine same as the above. It is operation | movement explanatory drawing of a farm work machine same as the above.

  An embodiment of the present invention will be described with reference to the drawings.

  1 to 4, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is an cultivator that is used by being connected to, for example, a tractor (not shown) that is a traveling vehicle. Then, the farm work machine 1 is connected to the tractor and moves forward (traveling direction) by the forward traveling of the tractor, and performs soil work as predetermined farm work, that is, for example, middle tillage, weeding, cultivating soil, and culling. Is.

  The farm work machine 1 includes a machine body 2 detachably connected to a three-point link part (a farm work machine lifting device) at the rear of a tractor (not shown). Note that the three-point link portion of the tractor can lift and lower the entire farm working machine 1 within a predetermined range using hydraulic pressure.

  The airframe 2 has a three-point connecting portion 4 that is a traveling vehicle connecting means at the front center, and this three-point connecting portion 4 is connected to a three-point link portion at the rear of the tractor. The machine body 2 has a cylindrical frame portion 5 that is longitudinal in the left-right direction, and a gear box portion 6 is provided at a substantially center in the left-right direction of the frame portion 5, and an input shaft 7 is connected to the gear box portion 6. Projects forward. The input shaft 7 is connected to the PTO shaft of the tractor via transmission means (not shown) constituted by, for example, a universal joint and a transmission shaft.

  In addition, the farm work machine 1 includes a plurality of (for example, three) transmission case bodies 11 provided on the frame part 5 of the machine body 2 so as to be pivotable in the vertical direction around the frame part 5. The transmission case body 11 is rotatable in the vertical direction about a rotation center axis (transmission case body rotation fulcrum) X in the left-right direction passing through the axis of the frame portion 5 with respect to the machine body 2.

  The transmission case body 11 has a case member 12 that is vertically long. The upper part of the case member 12 is attached to the frame part 5 of the body 2 so as to be rotatable about the rotation center axis X.

  In the case member 12, there are housed transmission means (not shown) composed of, for example, sprockets and chains. A front shaft 13 that is a left-right axis is fixed to the front side of a substantially central portion in the vertical direction of the case member 12 by welding or the like. A rear shaft (rotating cover body rotation fulcrum) 14 that is a horizontal axis is fixed to the rear surface side of the substantially central portion in the vertical direction of the case member 12 by welding or the like.

  Further, the farm work machine 1 includes a cultivating body 21 that is rotatably supported at a lower portion of each transmission case body 11 and performs a cultivating work while rotating in a predetermined direction. The tillage body 21 has a left and right rotation shaft 22 rotatably supported at the lower portion of the case member 12 of the transmission case body 11, and a plurality of tillage claws 23 attached to the rotation shaft 22. .

  Then, the power from the input shaft 7 side is transmitted from the transmission means in the transmission case body 11 to the rotary shaft 22, and as a result, the rotary shaft 22 rotates integrally with the plurality of tilling claws 23. Tilling work is performed with the tilling claws 23.

  Further, the farm work machine 1 is a movable tiller part cover that is provided on each transmission case body 11 so as to be rotatable in the vertical direction around the rear shaft 14 and covers the upper part and the left and right side parts of the tiller body 21. A rotating cover body 31 is provided. The rotation cover body 31 is rotatable in the vertical direction with respect to the transmission case body 11 about the rear shaft 14 in the left-right direction.

  The rotation cover body 31 has a cover top plate 32 having a substantially inverted U-shaped cross-section in a side view that covers the upper part of the tilling body 21. Cover side plates 33 that cover the side portions of the tillage body 21 are fixed to the left and right side end portions of the cover top plate 32. On the upper surface of the cover top plate 32, a projecting plate 34, which is a longitudinally attached mounting plate, is fixed so as to project upward.

  In the front part of the protruding plate 34, that is, in the portion of the protruding plate 34 that is positioned forward of the transmission case body 11, a circular hole 36 and a long hole that is slightly longer in the vertical direction in order from the front to the rear 37 is formed. The longitudinal direction of the long hole portion 37 substantially coincides with the longitudinal direction of the transmission case body 11.

  An insertion shaft 40 that is a fixed shaft in the left-right direction is inserted and fixed in the hole 36 of the protruding plate 34. The front shaft 13 of the transmission case body 11 is inserted into the long hole portion 37 of the protruding plate 34 so as to be slidable along the long hole portion 37 in the long hole portion 37.

  Further, in the rear portion of the protruding plate 34, that is, in the portion of the protruding plate 34 located behind the transmission case body 11, a circular first hole 41, second hole 42 and A third hole 43 is formed. Then, the rear shaft 14 of the transmission case body 11 is rotatably inserted into the first hole (bearing hole) 41 of the protruding plate 34. That is, the rotation cover body 31 is rotatably supported by the rear shaft 14 of the transmission case body 11.

  Further, the agricultural machine 1 is provided with a connecting body 46 which is a plate-like connecting means provided on the machine body 2 so as to be pivotable in the vertical direction about a horizontal axis 45 and which connects the machine body 2 and the rotating cover body 31. I have.

  The connecting body 46 is long in the front-rear direction, and a long hole 47 that is slightly long in the front-rear direction is formed in the rear part of the connecting body 46, and the rotation cover body 31 is inserted into the long hole 47. The shaft 40 is inserted. When the agricultural machine 1 shown in FIG. 3 is in the working state, the insertion shaft 40 is slidable along the long hole part 47 in the long hole part 47 (free state), and the agricultural machine 1 shown in FIG. In the non-working state (in the lifted state), the insertion shaft 40 is in contact with the front end portion which is the end portion of the long hole portion 47.

  In addition, the farm work machine 1 includes a pair of left and right gauge wheels 52 attached to the gauge wheel mounting portion 51 of the machine body 2. Further, a subsoiler 54 that performs subsoil crushing work in front of the tillage body 21 is attached to the front frame portion 53 of the machine body 2. Note that a fixed plate portion 55 is fixed to the front frame portion 53, and a connecting body 46 is provided on the fixed plate portion 55 so as to be pivotable in the vertical direction about a horizontal axis 45.

  Further, a cylindrical rotating member 60 having an opening on the upper and lower surfaces is attached to the rod mounting portion 56 of the airframe 2 so as to be rotatable about a left and right axis 58. A certain connecting rod 57 is inserted so as to be movable up and down. The lower end portion of the connecting rod 57 is rotatably attached to a horizontal shaft 59 inserted into the second hole portion 42 of the protruding plate 34. That is, the connecting rod 57 is rotatable with respect to the machine body 2 and can be moved up and down. And when the agricultural working machine 1 shown in FIG. 4 is in a non-working state, the connecting rod 57 suspends and supports the rotating cover body 31.

  The connecting rod 57 is formed with a pin hole 63 into which the first pin 61 and the second pin 62 can be attached and detached. A first spring 66 and a second spring 67 are disposed on the outer peripheral side of the connecting rod 57. The first spring 66 is located between the first pin 61 and the upper surface of the rotating member 60. The second spring 67 is located between the second pin 62 and the lower surface of the rotating member 60. The springs 66 and 67 that are elastic members are, for example, cylindrical coil springs having different lengths.

  When the agricultural machine 1 shown in FIG. 3 is in a working state, the first spring 66 is in a natural length state, and the second spring 67 is sandwiched between the second pin 62 and the lower surface of the rotating member 60 to compressively deform. It has become a state. The transmission case body 11 is prevented from turning upward more than necessary by the compressed second spring 67. Further, the rear side of the rotating cover body 31 is biased downward by the second spring 67 that is a biasing means, whereby the posture of the rotating cover body 31 is maintained in a predetermined working posture. .

  When the agricultural machine 1 shown in FIG. 4 is in a non-working state, the second spring 67 is in a natural length state, and the first spring 66 is sandwiched between the first pin 61 and the upper surface of the rotating member 60 and is compressed elastically. It is in a deformed state.

  Moreover, as shown in FIG. 1, the farm work machine 1 includes a cocoon forming body 71 that performs cocoon forming work behind each cultivated body 21. The saddle-molded body 71 is attached to the machine body 2 so as to be movable up and down via a saddle-molded body support means 73 constituted by parallel links 72 and the like.

  Further, the rotating cover body 31 and the saddle molded body supporting means 73 are connected by the connecting means 74, and the lower end portion of the connecting rod 75 of the connecting means 74 is inserted into the third hole 43 of the protruding plate 34. A left and right shaft 76 is rotatably attached.

  Next, the operation and the like of the farm work machine 1 will be described.

  FIG. 3 shows a side view of the main part when the agricultural machine 1 is in a working state. In this working state, the lower part of the tillage body 21 and the lower part of the subsoiler 54 are located below the field scene.

  Then, while the agricultural machine 1 moves forward by the traveling of the tractor, a predetermined soil work is performed on the soil in the field. During this work, the soil cultivated by the cultivating body 21 is rotated by the rotating cover body 31. It adheres to the inner surface (the surface facing the tilled body 21). That is, for example, the soil splashed by the tilling claws 23 of the tillage body 21 becomes clogged between the left and right cover side plates 33 and adheres to the lower surface of the cover top plate 32.

  However, even when the cultivated soil adheres to the inner surface of the rotating cover body 31 and grows up, when the agricultural machine 1 is in a non-working state, the attached soil has a cultivating claw 23 of the rotating cultivating body 21. Will be scraped off automatically.

  That is, for example, when turning the tractor at the end of the field, as shown in FIG. 4, the whole farm work machine 1 is raised to a predetermined non-working position at the three-point link part of the tractor, The lower part of the subsoiler 54 is positioned above the field scene. That is, the agricultural work machine 1 is lifted up to a predetermined position by the three-point link portion of the tractor when turning with the PTO shaft rotated, and is changed from the working state shown in FIG. 3 to the non-working state shown in FIG.

  At this time, the transmission case body 11 is rotated in one direction (clockwise direction in FIG. 4) around the rotation center axis X with respect to the machine body 2 by its own weight, and the rotation cover body 31 is With respect to the transmission case body 11, it rotates in the other direction (counterclockwise direction in FIG. 4) different from one direction around the rear shaft 14. The connecting body 46 pushes down the insertion shaft 40 on the front end side of the rotating cover body 31, so that the rotating cover body 31 rotates with respect to the transmission case body 11.

  As shown in FIGS. 5 and 6, as a result of both of these rotations, the space between the lower surface of the cover top plate 32 of the rotation cover body 31 and the tip side portion (radially outer end) of the tilling claw 23. The distance is reduced, and the decrease in the distance (a> b) causes the tilling nail 23 to come into contact with the soil and scrape the soil.

  Further, after the tractor is turned, the entire farm work machine 1 is lowered to a predetermined work position at the three-point link portion of the tractor, and the predetermined earth work is resumed. A space portion of a predetermined size exists between the soil (remaining adhered soil) and the tip side portion of the tilling claw 23. For this reason, wear due to the contact between the tilling claws 23 and the adhered soil is reduced, and the durability of the tilling claws 23 is improved.

  And according to the agricultural machine 1, when the agricultural machine 1 is lifted by the three-point link portion of the tractor and changes from the working state to the non-working state, the transmission case body 11 rotates and rotates with respect to the body 2. The moving cover body 31 rotates with respect to the transmission case body 11, and as a result, the distance between the inner surface of the rotating cover body 31 and the tip side portion of the tilling claw 23 is reduced, so that the rotating cover body is rotated during work. The soil stuck to 31 can be automatically dropped by the rotating tillage claw 23 during non-work such as turning, so that the burden on the operator can be reduced and the tillage claw 23 can be reduced by suppressing the wear of the tillage claw 23. It is also possible to improve the durability.

  Further, the insertion shaft 40 of the rotation cover body 31 is movable in the elongated hole portion 47 of the connecting body 46 when the agricultural work machine 1 is in a working state, and the insertion shaft 40 of the rotation cover body 31 is movable when the farm machine 1 is not in operation. Since it is in contact with the end of the long hole portion 47 of the connecting body 46, the dirt adhering to the rotating cover body 31 due to the rotating vibration of the rotating cover body 31 with respect to the transmission case body 11 during work is removed. While being able to drop, the flapping of the rotation cover body 31 when not working can be prevented.

  In addition, the agricultural working machine 1 is not limited to a middle cultivator such as a rotary cult, and may be another cultivator or the like.

  Further, for example, a rubber plate, a resin plate, a stainless plate, or the like, on which the soil does not easily adhere, may be attached to the inner surface of the rotating cover body 31.

  Further, for example, an elastic plate such as a rubber plate may be attached to the inner surface of the rotating cover body 31 and the tilling claw 23 may be in contact with the elastic plate when the agricultural machine 1 is not in operation.

1 Agricultural machine 2 Airframe
11 Transmission case body
21 Tillage
22 Rotating shaft
23 Tillage Claw
31 Rotating cover body
40 Insertion shaft
46 Linkage
47 Slotted hole

Claims (3)

A farm machine used in conjunction with a traveling vehicle,
An airframe coupled to the traveling vehicle;
A transmission case body rotatably provided on the airframe;
A rotary shaft that is rotatably supported at the lower portion of the transmission case body and a tiller body having a plurality of tillage claws attached to the rotary shaft;
A rotation cover body that is rotatably provided on the transmission case body and covers the tillage body;
When the farm work machine is lifted and changes from the working state to the non-working state, the transmission case body rotates with respect to the machine body and the rotation cover body rotates with respect to the transmission case body, As a result, the distance between the rotating cover body and the tilling claw is reduced. It is provided in the machine body so as to be rotatable, and includes a connecting body in which a long hole portion is formed.
The rotating cover body has an insertion shaft that is inserted through the long hole portion,
The insertion shaft is movable in the long hole portion during a working state, and the insertion shaft is in contact with an end portion of the long hole portion during a non-working state. The agricultural machine according to 1. When the farm work machine is lifted from the working state to the non-working state, the connecting body pushes down the insertion shaft on the front end side of the rotating cover body, so that the rotating cover body rotates with respect to the transmission case body. The agricultural machine according to claim 2.

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