JP5930884B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine that can prevent interference between a stop pin portion and a rotating portion.

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

  This conventional farm work machine is provided with a lifting body such as a gauge ring for making the working depth constant, and this lifting body is releasably fixed to the holder body by a fixing means.

  That is, for example, as shown in FIGS. 11 and 12, a conventional agricultural machine includes a left and right holder body 1 provided on the machine body, a lifting body 2 such as a gauge ring that can be lifted and lowered relative to the holder body 1, Fixing means 3 for releasably fixing the elevating body 2 to the holder body 1 is provided.

  The holder body 1 has a cylindrical portion 5 whose upper and lower surfaces are open, a holder side hole portion 6 formed in the cylindrical portion 5, and a support shaft portion 7 projecting from the cylindrical portion 5. Yes. The elevating body 2 has a long arm portion 8, a plurality of arm side holes 9 formed in the arm portion 8, and a rotating portion 10 that is rotatably attached to the arm portion 8.

  Further, the fixing means 3 has a U-shaped frame 11 attached to the support shaft portion 7 of the holder body 1 so as to be rotatable about the support shaft portion 7. The U-shaped frame 11 is provided with an L-shaped stop pin 12 slidably operated by an operator by hand. The set pin 12 can be inserted into and removed from the holder side hole 6 and the arm side hole 9 and is biased in the pin insertion direction by a biasing member 13 such as a coil spring.

  And the raising / lowering body 2 is fixed with respect to the holder body 1 by the stop pin 12 being inserted in the holder side hole 6 and the arm side hole 9. Further, when the set pin 12 is extracted from the holder side hole portion 6 and the arm side hole portion 9, the fixing of the lifting body 2 to the holder body 1 is released.

JP 2001-269011 A

  However, in the conventional agricultural machine, for example, as shown in FIG. 11, when the lifting body 2 is fixed at the highest position with respect to the holder body 1, the stop pin 12 and the rotating portion 10 of the lifting body 2 interfere with each other. There is a risk.

  Even when the front end is turned upward during the operation of the stop pin 12, the stop pin 12 is rotated by the vibration during the operation so that the front end is directed downward. May interfere.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can prevent that a stop pin part and a rotation part interfere.

The agricultural machine according to claim 1 is a holder body having a holder side hole portion and a support shaft portion, a lifting body that can be lifted and lowered relative to the holder body, and the lifting body that is releasably fixed to the holder body. The lifting body includes an arm portion, a plurality of arm side holes formed in the arm portion, and a rotating portion rotatably attached to the arm portion, The means includes a cylindrical operation portion attached to the support shaft portion so as to be movable in the axial direction, a stop pin portion projecting from the operation portion, an inner peripheral surface of the operation portion, and the support shaft portion. An urging member disposed between the outer peripheral surface and urging the operation portion in a pin insertion direction, and the stop pin portion is inserted into the holder side hole portion and the arm side hole portion. The lifting body is fixed to the holder body, and the retaining pin portion is By being withdrawn from the dust side hole portion and the arm side hole, in which fixed to said holder body of said lifting body is released.

  The farm machine according to claim 2 is the farm machine according to claim 1, wherein the operation portion of the fixing means is formed in a T-shape.

  The agricultural machine according to claim 3 is the agricultural machine according to claim 1 or 2, wherein the operation portion of the fixing means is rotatable in the circumferential direction of the support shaft portion of the holder body.

請 Motomeko 4 agricultural machine described in claims 1 to agricultural machine according to one or more described 3, lifting body is one that is gauge wheel for a constant working depth.

  According to the present invention, the fixing means is configured to include the operation portion that is attached to the support shaft portion of the holder body so as to be movable in the axial direction, and the stop pin portion that protrudes from the operation portion. It can prevent that a pin part and a rotation part interfere.

It is a side view of the agricultural working machine which concerns on one embodiment of this invention. It is a top view of an agricultural working machine same as the above. It is a side view of the gauge ring | wheel part of an agricultural working machine same as the above. It is a top view of the holder body of a farm working machine same as the above. It is an exploded view which shows a holder body and fixing means same as the above. (A) And (b) is a figure which shows the state in which the stop pin part was inserted in the holder side hole. (A) And (b) is a figure which shows the state from which the stop pin part was extracted from the holder side hole. It is a fragmentary sectional view of the agricultural machine concerning other embodiments of the present invention. It is a side view of the operation member of a farm work machine same as the above. It is a front view of an operation member same as the above. It is a side view of the gauge ring | wheel part of the conventional agricultural working machine. It is a fragmentary sectional view of an agricultural working machine same as the above.

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

  Reference numeral 21 in the figure denotes an agricultural machine. The agricultural machine 21 is connected to the rear portion of a tractor (not shown), for example, a traveling vehicle, and is an agricultural operation while moving the field forward (advancing direction) by traveling the tractor. This is a tillage work machine that performs tillage work.

  The farm work machine 21 includes a machine body 22 removably connected to a three-point link hitch part (work machine lifting support part) at the rear of a tractor (not shown).

  The airframe 22 has a frame pipe portion 23 that is a frame portion that is longitudinal in the left-right direction, and an input shaft holding portion 24 is provided at the center in the longitudinal direction of the frame pipe portion 23. The direction input shaft 25 is rotatably held. The input shaft 25 is connected to a PTO shaft of a tractor (not shown) via power transmission means, and power from the tractor side is input from the input shaft 25 to the agricultural machine 21 side.

  A transmission case portion 26 and a bracket portion 27 are provided at both longitudinal ends of the frame pipe portion 23. Between the transmission case portion 26 and the bracket portion 27 that are opposed to each other, a cultivating body (rotary) 31 that is cultivated while rotating in a predetermined direction by power from the input shaft 25 side is rotatably mounted.

  The cultivating body 31 includes a left and right cultivating shaft 32 rotatably supported by a lower portion of the transmission case portion 26 and a lower portion of the bracket portion 27, and is attached to the cultivating shaft 32 and integrated with the cultivating shaft 32. It has a plurality of tilling claws 33 that perform tilling work while rotating.

  The upper part of the cultivating body 31 is covered with the cultivating cover part 30 of the machine body 22, and this cultivating cover part 30 is formed in a curved plate shape that is convex upward. At the rear end of the tillage cover portion 30, a leveling body 35 that performs leveling work is provided behind the tillage body 31 so as to be rotatable in the vertical direction.

  The leveling body 35 is attached to the rear end portion of the tillage cover portion 30 of the machine body 22 via a hinge 36 so as to be rotatable, and is attached to both ends of the level plate 37 in the left-right direction so as to be foldable. And an extended flat plate 38. The plowing body 31 and the leveling body 35 constitute a working means 40 that performs a plowing and leveling work that is an agricultural work, and the working means 40 is provided in the machine body 22.

  On the other hand, as shown in FIG. 1 and FIG. 2, the airframe 22 has a hitch pipe portion 41 that is a frame portion that is located in the left-right direction and is located in front of the frame pipe portion 23. Holder bodies 42 serving as gauge ring support means are fixedly provided at a plurality of locations in the hitch pipe portion 41, that is, for example, two locations on the left and right sides that are separated from each other.

  The agricultural machine 21 includes a gauge ring 43 that is a lifting body that can be raised and lowered with respect to each holder body 42, and a fixing means 44 that releasably fixes the gauge ring 43 to the holder body 42. . The gauge wheel (grounding wheel) 43 is for making the working depth of the working means 40, that is, the tilling depth of the tilling body 31, constant, and can be adjusted in the vertical position with respect to the holder body.

  Here, as shown in FIG. 3 to FIG. 7, the holder body 42 includes a rectangular cylindrical tubular portion 46 whose upper and lower surfaces are open, and round hole-shaped upper and lower portions formed in the cylindrical portion 46. It has a holder side hole (pin hole) 47 and a cylindrical shaft 46 that has a longitudinal and round shaft-shaped support shaft portion 48 that protrudes horizontally outward.

  The cylindrical portion 46 has four plate portions, that is, a first plate portion 51, a second plate portion 52, a third plate portion 53, a fourth plate portion 54, and a rectangular shape fixed to the inner surface of the third plate portion 53. And the abutment plate portion 55.

  The upper holder side hole 47 is formed in the upper through hole 56a formed in the upper portion of the first plate portion 51, the upper through hole 56b formed in the upper portion of the third plate portion 53, and the upper portion of the plate portion 55. Similarly, the lower holder side hole 47 includes a lower through hole 57a formed in the lower portion of the first plate portion 51, and a third plate portion. The lower through-hole 57b formed in the lower part of 53 and the lower through-hole 57c formed in the lower part of the abutting plate portion 55 are configured (see FIG. 5).

  Further, the third plate portion 53 of the cylindrical portion 46 has a shaft mounting hole portion 58, and the base end portion of the support shaft portion 48 is fitted into the shaft mounting hole portion 58 and fixed thereto by welding or the like. That is, the support shaft portion 48 protrudes from the third plate portion 53 of the tubular portion 46, and the support shaft portion 48 has an axial direction in the horizontal direction.

  The support shaft portion 48 includes a shaft portion 61 whose base end portion is fixed to the third plate portion 53 and a flange portion 62 provided integrally in the vicinity of the base end of the shaft portion 61. A circumferential E-ring groove 63 is formed in the vicinity of the tip of the shaft portion 61, and an E-ring 64 as a retaining member is attached to the E-ring groove 63.

  The gauge ring 43 is vertically long and has a rectangular cross section that is inserted into the cylindrical portion 46 of the holder body 42 so as to be movable up and down (slidable in the vertical direction along the inner peripheral surface of the cylindrical portion 46). 71.

  In the arm portion 71, a plurality of round hole-shaped arm side holes (pin holes) 72 arranged in the vertical direction along the arm portion 71 at intervals from each other penetrate through the arm portion 71 in the thickness direction. Is formed.

  At the lower end of the arm portion 71, a rotating portion 73, which is a cylindrical wheel portion that travels on the field while rotating in a predetermined rotating direction (the arrow direction shown in the figure), rotates around a horizontal shaft portion 74. It is attached as possible. The outer peripheral surface portion of the rotating unit 73 is configured by a rubber member 75 that is a cylindrical soil adhesion preventing member that is difficult to adhere to soil in a farm field, for example. The rubber member 75 is baked on the outer peripheral portion of the main body member 76 of the rotating portion 73. The rubber member 75 that is a rubber portion may be detachable from the outer peripheral portion of the main body member 76.

  In the vicinity of the lower end of the arm portion 71, scrapes that adhere to the outer peripheral surface of the rotating portion 73 during work (soil is less likely to adhere, but soil may adhere depending on the soil, for example) are removed by scraping. A plate-shaped scraper 77 serving as a deposit removing means is attached. The scraper 77 is attached to a predetermined position of the arm portion 71 by screwing a mounting bolt 79 into a screw hole 78 formed in the arm portion 71. Note that an axial gripping portion 80 projects from the upper end portion of the arm portion 71.

  The fixing means 44 is a cylindrical shape directly attached to the outer peripheral side of the support shaft portion 48 of the holder body 42 so as to be movable in the axial direction of the support shaft portion 48 and rotatable about the support shaft portion 48. An operation unit 81 is provided. That is, the operation portion 81 with a protrusion that is manually operated by the operator when adjusting the vertical position of the gauge wheel 43 is arranged along the outer peripheral surface of the support shaft portion 48 of the holder body 42 with the axis of the support shaft portion 48. It is slidable in the direction, and is slidable in the circumferential direction of the support shaft 48 around the support shaft 48.

  The operation unit 81 is formed in a T shape, for example. That is, the operation portion 81 includes a cylindrical portion 82 having both ends opened in a cylindrical shape capable of covering substantially the entire outer peripheral surface of the support shaft portion 48, and left and right outer peripheral surfaces at the distal end portion of the cylindrical portion 82. It is composed of a pair of projecting portions (projections) 83 in the form of a round bar that project integrally from both sides in opposite directions in the horizontal direction.

  Then, on the lower side of the outer peripheral surface of the proximal end portion of the cylindrical portion 82 of the operation portion 81, a round bar-shaped retaining pin portion 85 that can be inserted into and removed from the holder side hole portion 47 and the arm side hole portion 72 that match each other. Are integrally projected horizontally toward the cylindrical portion 46 side. That is, the base end portion of the stop pin portion 85 is fixed to the outer periphery of the operation portion 81, and the portion other than the base end portion of the stop pin portion 85 is located on the cylindrical portion 46 side with respect to the base end surface of the operation portion 81. ing. The operation portion 81 and the stop pin portion 85 constitute an operation pin member 86 that is integrally formed of, for example, a metal casting.

  Further, between the inner peripheral surface of the cylindrical portion 82 of the operation portion 81 and the outer peripheral surface of the support shaft portion 48 of the holder body 42, the operation portion 81 is placed in the pin insertion direction (the holder side where the stop pin portions 85 are aligned with each other). A coil spring 88, which is a cylindrical urging member that urges the hole 47 and the arm side hole 72 in a direction of insertion), is disposed.

  One axial end 88a of the coil spring 88 directly contacts the spring receiving portion 89 on the inner peripheral side of the base end portion of the cylindrical portion 82 of the operation portion 81, and the other axial end 88b of the coil spring 88 is the support shaft portion 48. Is in contact with the E-ring 64 on the outer peripheral side of the front end portion thereof via a cylindrical collar 90. That is, the coil spring 88 that is a compression spring is mounted between the collar 90 that is secured by the E ring 64 and the spring receiving portion 89 of the operation portion 81.

  Further, as is apparent from FIG. 7B, the length dimension (the length dimension in the direction perpendicular to the axial direction of the support shaft portion 48) A of the T-shaped operation portion 81 is the holder. The length of the cylindrical portion 46 of the body 42 is shorter than the vertical dimension. Even when the pair of protruding portions 83 are positioned along the vertical direction, the lower end of the lower protruding portion 83 is positioned higher than the lower end of the cylindrical portion 46.

  As described above, the fixing means 44 is constituted by, for example, the operation pin member 86, the coil spring 88, the collar 90, and the E ring 64.

  Then, the gauge ring 43 is fixed to the holder body 42 by inserting the retaining pin portion 85 of the operation pin member 86 into the holder side hole portion 47 and the arm side hole portion 72 that are coincident with each other. Further, when the retaining pin portion 85 of the operation pin member 86 is extracted from the holder side hole portion 47 and the arm side hole portion 72 that are coincident with each other, the fixing of the gauge ring 43 to the holder body 42 is released.

  Next, the operation of the agricultural machine 21 will be described.

  When adjusting the vertical position of the gauge ring 43 with respect to the holder body 42, the operator moves the operation pin member 86 against the outer peripheral surface of the support shaft portion 48 against the biasing force of the coil spring 88, as shown in FIG. 7. Then, the operation pin member 86 is rotated 90 degrees in the circumferential direction along the outer peripheral surface of the support shaft portion 48.

  In the state of FIG. 7, the stop pin portion 85 of the operation pin member 86 is in a state of being extracted from the holder side hole portion 47 and the arm side hole portion 72, and the front end surface of the stop pin portion 85 is the holder. It is in contact with the outer surface of the cylindrical part 46 of the body 42.

  In this state, the operator grips the grip portion 80 and moves the gauge ring 43 up and down relative to the holder body 42 to thereby select one holder side hole portion 47 and one selected arm side hole portion. 72 are matched with each other.

  The operator selects one holder-side hole 47 from the upper and lower two holder-side holes 47 and selects one of the plurality of (for example, ten) arm-side holes 72 arranged in the vertical direction. The arm side hole 72 is selected.

  Thereafter, the operator manually operates the operation pin member 86 to insert the set pin portion 85 of the operation pin member 86 into the holder side hole portion 47 and the arm side hole portion 72 that are coincident with each other.

  At this time, the operation pin member 86 slides in the pin insertion direction along the outer peripheral surface of the support shaft portion 48 by the biasing force of the coil spring 88, and the holder side hole portion in which the stop pin portions 85 coincide with each other by this sliding movement. 47 and the arm side hole 72.

  By inserting the retaining pin portion 85 into both the holes 47 and 72, the gauge ring 43 is fixed with respect to the holder body 42, and the vertical position of the gauge ring 43 is fixed at a desired position corresponding to the soil quality and the like of the field. .

  In addition, in a state in which the retaining pin portion 85 is inserted into both the hole portions 47 and 72, the operation portion 81 of the operation pin member 86 is movable in the axial direction of the support shaft portion 48 with respect to the support shaft portion 48. However, it cannot rotate in the circumferential direction of the support shaft portion 48.

  Then, after adjusting the vertical position of the gauge wheel 43, when the farm work machine 21 is moved in the traveling direction by traveling of the tractor, the tilling work is performed by the tilling body 31, and the ground leveling body 35 is grounded behind the tilling body 31. Work is done.

  At this time, in front of the cultivating body 31, the rotating portion 73 of the gauge wheel 43 travels on the field scene while rotating in a predetermined direction. For this reason, the tillage depth of the tillage body 31 is maintained constant, and stable tillage work is performed.

  According to the agricultural machine 21, the fixing means 44 is attached to the support shaft portion 48 of the holder body 42 so as to be movable in the axial direction and rotatable in the circumferential direction thereof, and the operation portion 81 81. Since it has a configuration having a stop pin portion 85 protruding from 81, it is not only more compact than the conventional configuration, but also the stop pin portion 85 interferes with the outer peripheral portion of the rotating portion 73 of the gauge ring 43. Can be prevented.

  That is, for example, as shown in FIG. 3, even when the gauge ring 43 is fixed to the uppermost position with respect to the holder body 42, the retaining pin portion 85 has a rubber member 75 on the outer peripheral side of the rotating portion 73 of the gauge ring 43. And the rubber member 75 is not damaged by the stop pin portion 85.

  Further, since the operation portion 81 of the fixing means 44 is formed in a T-shape, it is possible to appropriately prevent the stop pin portion 85 and the rotating portion 73 of the gauge ring 43 from interfering with each other, and the operation portion 81 is made to be L-shaped. The operability is better than in the case of the shape.

  Further, since the fixing means 44 has a coil spring 88 that urges the operation portion 81 in the pin insertion direction, by using the urging force of the coil spring 88, the holder-side hole portion 47 and It can be appropriately inserted into the arm side hole 72, and the operability is even better.

  Further, when the gauge ring 43 is fixed to the holder body 42, the operation portion 81 of the operation pin member 86 cannot rotate in the circumferential direction of the support shaft portion 48 with respect to the support shaft portion 48. Thus, the operation portion 81 is not rotated by this vibration, and it is possible to reliably prevent the stop pin portion 85 and the rotating portion 73 of the gauge wheel 43 from interfering with each other.

  Note that the operation pin member 86 of the fixing means 44 is not limited to one made of a casting, and may have a welding structure shown in FIGS. 8 to 10, for example.

  The operation pin member 86 shown in FIGS. 8 to 10 is formed by fixing a fixing pin portion 85 to a T-shaped operation portion 81 by welding.

  The operation portion 81 includes a cylindrical portion 82 having both ends open in a cylindrical shape capable of covering substantially the entire outer peripheral surface of the support shaft portion 48, and both the left and right sides of the outer peripheral surface at the tip of the cylindrical portion 82. It is composed of a pair of projecting portions (projections) 83 having a triangular plate shape projecting in opposite directions. And the stop pin part 85 is being fixed to the lower side of the outer peripheral surface in the base end part of the cylindrical part 82 by welding. A roll pin 64 a is attached to the support shaft portion 48 instead of the E ring 64.

  And even if it is other embodiment shown in such FIG. 8 thru | or FIG. 10, there can exist an effect similar to the said one Embodiment.

  In any of the embodiments, the lifting body that can be moved up and down with respect to the holder body 42 is not limited to the gauge wheel 43, and may be any, for example, a directional wheel or a pressure-reducing wheel.

  Further, the shape of the operation portion 81 of the fixing means 44 is preferably T-shaped, but may be L-shaped or a straight straight line, for example. Note that the T-shape means a T-shape in a strict sense, and also includes a substantially T-shape such as a Y-shape or an arrow shape.

Furthermore, the holder body 42 is not limited to the one having the upper and lower two holder side holes 47, and may have only one holder side hole 47, for example .

21 Farm machines
42 Holder body
43 Gauge wheel as a lifting body
44 Fixing means
47 Holder side hole
48 Spindle part
71 Arm
72 Arm side hole
73 Rotating part
81 Operation section
85 Stop pin
88 Coil spring as a biasing member

Claims (4)

A holder body having a holder side hole portion and a support shaft portion;
A lifting body that can be lifted and lowered relative to the holder body;
Fixing means for releasably fixing the lifting body to the holder body,
The lifting body is
An arm,
A plurality of arm side holes formed in the arm portion;
A rotating part rotatably attached to the arm part,
The fixing means includes
A cylindrical operation unit attached to the support shaft part so as to be movable in the axial direction;
A stop pin portion protruding from the operation portion ,
A biasing member disposed between an inner peripheral surface of the operation portion and an outer peripheral surface of the support shaft portion, and biasing the operation portion in a pin insertion direction ;
By inserting the retaining pin portion into the holder side hole and the arm side hole, the elevating body is fixed to the holder body,
The farm machine according to claim 1, wherein the fixing of the lifting body to the holder body is released by extracting the retaining pin part from the holder side hole part and the arm side hole part. The farm working machine according to claim 1, wherein the operation portion of the fixing means is formed in a T shape. The farm working machine according to claim 1 or 2, wherein the operation portion of the fixing means is rotatable in a circumferential direction of the support shaft portion of the holder body. The agricultural working machine according to any one of claims 1 to 3 , wherein the elevating body is a gauge wheel for making a working depth constant.

Images