JP6151057B2 - Agricultural machine - Google Patents

Description

  The present invention relates to an agricultural machine that can prevent the leveling body from rattling and reduce noise.

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

  This conventional farm work machine includes a machine body connected to a traveling vehicle such as a tractor, a cultivating body provided rotatably on the machine body, a leveling body provided rotatably on the machine body in the vertical direction, and a machine body. A plurality of connecting rods provided between the leveling body and each of the plurality of connecting rods are constituted by rod members whose lengths cannot be adjusted.

  And when deeply cultivating with the cultivator while keeping the leveling body in the lifted state (high lift state in which the plate-shaped leveling body is in a horizontal posture substantially along the horizontal plane), without using the stopper device, the rod The leveling body is fixed to the aircraft using the members.

JP 2005-218316 A

  However, when the leveling body is fixed to the airframe using a rod member that is a connecting rod, the gap between the hole and the shaft on the front end side of the rod member and the hole and shaft on the rear end side of the rod member There is a risk that the ground leveling body will rattle due to the vibration of the tillage body and a large noise may be generated due to the gap between them.

  This invention is made | formed in view of such a point, and it aims at providing the agricultural machine which can prevent the play of a leveling body and can reduce a noise.

The agricultural machine according to claim 1 is a machine body connected to a traveling vehicle, a cultivating body rotatably provided on the machine body, a leveling body provided on the machine body so as to be rotatable in the vertical direction, and the machine body. And a plurality of connecting rods provided between the leveling body, and at least one of the plurality of connecting rods is constituted by rod means capable of adjusting the length, and the leveling body is When deeply cultivating with the tillage body in the lifted state, the leveling body is fixed in the lifted state by the length adjustment of the rod means so that it does not rattle against the airframe. is there.

The agricultural machine according to claim 2 is the agricultural machine according to claim 1, wherein when performing the deep tillage work with the tillage body while the leveling body is in the lifted state, the rod means is adjusted by adjusting the length of the rod means. The leveling body is slightly deformed and is fixed in a lifted state so as not to rattle with respect to the aircraft.

The agricultural machine according to claim 3 is the agricultural machine according to claim 1 or 2, wherein the turn buckle as the rod means has a first screw part and a second screw part having different spiral directions, and is screwed into the first threaded portion, the first attachment member removable with respect to the machine body, is screwed into the second threaded section, it has a second attached body detachable with respect to the ground leveling member The second attachment body is attached to the leveling body during deep plowing work while the leveling body is being lifted, but is removed from the leveling body during normal work when the leveling body is free .

  According to the present invention, when deeply cultivating with the cultivator while keeping the leveling body in the lifted state, the leveling body is fixed in the lifting state with respect to the body by adjusting the length of the rod means. The backlash of the leveling body can be prevented and noise can be reduced.

It is a top view of the agricultural working machine which concerns on one embodiment of this invention. It is a side view of an agricultural working machine same as the above. It is a top view at the time of the leveling body holding state of a farm working machine same as the above. It is a side view at the time of the leveling body holding state of an agricultural working machine same as the above. It is a partial top view at the time of the leveling body holding state of an agricultural working machine same as the above. It is a side view of the turnbuckle (rod means) of an agricultural working machine same as the above.

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

  In the figure, reference numeral 1 denotes an agricultural machine. The agricultural machine 1 is connected to the rear portion of a tractor (not shown) that is a traveling vehicle, and is used for tillage leveling work while moving the field forward (traveling direction) by traveling of the tractor. Is to do.

  As shown in FIG. 1 and FIG. 2, the agricultural machine 1 is detachably connected to a three-point link hitch part (worker lifting support part) at the rear of the tractor, and is rotatable to the machine 2. Provided between the machine body 2 and the ground leveling body 4, the ground leveling body 4 provided on the machine body 2 so as to be pivotable in the vertical direction and performing leveling work behind the tillage body 3, and the ground body 4. And a plurality of connecting rods 5 that support the leveling body 4, for example, four rod-like connecting rods 5 arranged in the left-right direction.

  The machine body 2 has a frame portion 6 that is longitudinal in the left-right direction, and an input shaft 7 in the front-rear direction is rotatably provided at the longitudinal center portion of the frame portion 6. The input shaft 7 is connected to the PTO shaft of the tractor via a joint or the like, and inputs power from the tractor side to the agricultural machine 1 side.

  A chain case portion 8 as a transmission case portion is provided at a left end portion which is one end portion in the longitudinal direction of the frame portion 6, and a bracket portion 9 is provided at a right end portion which is the other end portion in the longitudinal direction of the frame portion 6. .

  Between the left and right chain case parts 8 and the bracket part 9 that are spaced apart from each other, a cultivating body 3 that is cultivated while being rotated in a predetermined direction by power from the input shaft 7 side is rotatably mounted. The tillage body 3 has a left and right rotating shaft 11 and a plurality of tilling claws 12 attached to the rotating shaft 11.

  The machine body 2 also has a plate-like cover portion 10 that is longitudinal in the left-right direction and covers the upper portion of the tillage body 3. At the rear end of the cover portion 10, a horizontal and longitudinal plate-shaped leveling body (level plate) 4 that touches the farm scene behind the tiller 3 and performs leveling work is provided via a plurality of hinges 13. It is provided so as to be rotatable in the vertical direction. That is, the front end portion of the leveling body 4 is rotatably attached to the rear end portion of the cover portion 10 of the airframe 2 via the left and right shafts 14, and the leveling body 4 has the front end side shaft 14 in the normal state. It can be rotated in the vertical direction with respect to the cover portion 10 so that the rear end side moves up and down as a center (see FIG. 2).

  The leveling body 4 has a plate-shaped leveling main body portion 16 that is longitudinal in the left-right direction for performing leveling work behind the tillage body 3, and a plurality of locations spaced in the left-right direction on the upper surface of the leveling main body portion 16, for example, At four places, rod connecting portions 17 are projected.

  Connected to each rod connecting portion 17 is a longitudinal connecting rod 5 that connects the machine body 2 and the leveling body 4 via a rotating member 18 such as a short cylindrical tumbler. Each rod connecting portion 17 includes a pair of left and right opposing plates 19 that are spaced apart from each other, for example.

  As shown in FIGS. 1 and 2, the longitudinal intermediate portion of each connecting rod 5 is inserted into an insertion hole 18 a of a rotating member 18 that is rotatably supported by support holes 19 a of both opposing plates 19. It is slidably inserted. Further, the front end portion of each connecting rod 5 is connected to a rod connecting portion 20 projecting from the frame portion 6 of the machine body 2 via a left-right shaft 21 so as to be rotatable about the shaft 21.

  That is, a shaft (stop pin) 21 having a flange 21a at one end in the axial direction is removably inserted into the hole 22 of the rod connecting portion 20 of the airframe 2 and the hole 23 of the front end portion of the connecting rod 5, The shaft 21 is prevented from being removed from both holes 22 and 23 by a retaining pin (R pin) 24.

  The front end portion of the connecting rod 5 is detachably attached to the rod connecting portion 20 of the airframe 2. When the front end portion of the connecting rod 5 is removed from the rod connecting portion 20, the retaining pin 24 is pivoted. After being removed from the 21 pin holes, the shaft 21 is pulled out from both holes 22 and 23.

  Two coil-shaped springs 26 and 27 are disposed on the outer peripheral side of the connecting rod 5, and spring receivers 28 and 29 with which the springs 26 and 27 come into contact are detachably attached to the connecting rod 5. . During normal work in the leveling body free state (normal plowing leveling work), the leveling body 4 can be rotated in the vertical direction with respect to the machine body 2 and a desired grounding based on the biasing force of the spring 26 is achieved. Touch the field with pressure and level the ground.

  Furthermore, there is provided a stopper body 30 which is a stopper device for fixing the leveling body 4 in a horizontal lifting state with respect to the body 2 (a high lift state in which the plate-like leveling body 4 is in a horizontal posture substantially along a horizontal plane). The rotating member 18 is detachably attached to the outer peripheral side.

  The stopper body 30 is inserted into a pin hole (not shown) of the connecting rod 5 and a pin hole 18b of the rotating member 18 to restrict the movement (sliding) of the connecting rod 5 with respect to the rotating member 18. 31 and an operation lever 32 that is operated when the movement restriction by the stopper pin 31 is released.

  When the maintenance body 3 and the leveling body 4 are maintained and cleaned, the leveling body 4 may be fixed in a horizontal lifting state using the stopper body 30 (FIG. 1 of Patent Document 1). When the plowing work is carried out deeper than the normal work with the cultivating body 3 while the leveling body 4 is in the horizontal lifting state, that is, when the plowing work is performed with the leveling body in the lifting state, the stopper pin 31 is damaged. 3 to 5, the leveling body 4 is fixed to the lifted state using the connecting rod 5 without using the stopper body 30.

  In this case, in addition to the stopper body 30, the springs 26 and 27, the spring receivers 28 and 29, and the rotating member 18 are removed. The rear end portion of the connecting rod 5 is connected to the rear end portion of the rod connecting portion 17 of the leveling body 4 by using a shaft (stop pin) 36 and a retaining pin (R pin) 37 in the same manner as the front end portion thereof. Install in a removable manner.

  Specifically, after the leveling body 4 is lifted up with respect to the machine body 2 until the leveling body 4 is in the lifted state, the cylindrical tubular portion 40 located at the rear end of the connecting rod 5 is used. Is hooked on the catch receiving portion 42 having a substantially C-shape in a side view of the plate-like positioning member 41 installed between the rear ends of the opposing plates 19 of the rod connecting portion 17 of the leveling body 4. The hole 44 of the rod connecting portion 17 and the hole 45 of the cylindrical portion 40 of the connecting rod 5 are opposed to each other. Next, the shaft 36 having the flange portion 36a is removably inserted into the holes 44 and 45 facing each other, and the retaining pin 37 is removably inserted into the pin hole of the inserted shaft 36.

  In addition, when performing normal tillage leveling work, the rear end portion of the connecting rod 5 is removed from the rear end portion of the rod connecting portion 17 of the leveling body 4, and the original normal state shown in FIGS. Return to the state.

  Here, as apparent from FIGS. 1, 3 and 5, etc., in this agricultural working machine 1, at least one of the plurality of four connecting rods 5, that is, the inner two, for example, is long. It is composed of a turnbuckle 51 which is an adjustable rod means, and the remaining two outside members are composed of a rod member 52 whose length cannot be adjusted.

  Then, when deeply cultivating the cultivating body 3 while the leveling body 4 is in a horizontal lifting state, the leveling body is adjusted by adjusting the length of the turnbuckle 51 that is a telescopic member that can expand and contract along the longitudinal direction. 4 is fixed in a predetermined lifted state so that it does not rattle against the body 2. Note that the turnbuckle 51 functions in the same manner as the rod member 52 during normal operation.

  As shown in FIG. 6, the turnbuckle 51 has a longitudinal operating body 55 that can be operated to rotate, having first screw hole portions 53 and second screw hole portions 54 having different spiral directions at both ends in the longitudinal direction, A first mounting body 56 that is screwed into the first screw hole 53 and can be attached to and detached from the rod connecting portion 20 of the machine body 2 via the shaft 21, and a rod of the leveling body 4 that is screwed into the second screw hole 54. It has the 2nd attachment body 57 which can be attached or detached with respect to the connection part 17 via the axis | shaft 36. FIG.

  The operation body 55 is one that can be held and rotated by an operator (operator) by hand. The operation body 55 has an elongated cylindrical tubular portion 60 with both axial end surfaces open. A first nut portion 61 is fixed to one end portion in the direction by welding or the like, and a second nut portion 62 is fixed to the other end portion in the axial direction of the cylindrical portion 60 by welding or the like.

  A first screw hole portion 53 that is a first screw portion is formed on the inner peripheral side of the first nut portion 61, and a second screw hole portion 54 that is a second screw portion is formed on the inner peripheral side of the second nut portion 62. The first screw hole portion 53 and the second screw hole portion 54 have different spiral directions. That is, the spiral direction of the screw groove of the first screw hole portion 53 and the spiral direction of the screw groove of the second screw hole portion 54 are opposite to each other.

  The first attachment body 56 includes a screw shaft portion 66 that is a screw portion screwed into the first screw hole portion 53 at the front end portion of the operation body 55, and a cylindrical portion 67 that is fixed to the screw shaft portion 66. have. A screw groove that is screwed with the screw groove of the first screw hole portion 53 is formed on the outer peripheral portion of the screw shaft portion 66. The cylindrical portion 67 is formed with a hole 23 into which the shaft 21 that is a stop pin is removably inserted.

  The second attachment body 57 includes a screw shaft portion 68 that is a screw portion screwed into the second screw hole portion 54 at the rear end portion of the operation body 55, and a cylindrical portion 40 that is fixed to the screw shaft portion 68. And have. A screw groove that is screwed with the screw groove of the second screw hole portion 54 is formed on the outer peripheral portion of the screw shaft portion 68. The cylindrical portion 40 is formed with a hole 45 into which a shaft 36 that is a stop pin is removably inserted.

  When the operating body 55 is rotated in one direction, the first mounting body 56 and the second mounting body 57 move in directions away from each other, and as a result, the turnbuckle 51 extends in accordance with the operation of the operating body 55. When the operating body 55 is rotated in the other direction, the first mounting body 56 and the second mounting body 57 move in a direction in which the operating body 55 approaches each other. As a result, the turnbuckle 51 contracts in accordance with the operation of the operating body 55.

  On the other hand, as shown in FIG. 5 and the like, the rod member 52 has an elongated rod-like portion 71 having a longitudinal direction in the front-rear direction and a tubular portion 40 fixed to the rear end portion of the rod-like portion 71. ing. A hole 23 is formed in the front end portion of the rod-shaped portion 71 so that the shaft 21 serving as a stop pin is removably inserted. The cylindrical portion 40 is formed with a hole 45 into which a shaft 36 that is a stop pin is removably inserted.

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

  During normal operation in a leveling body free state, as shown in FIGS. 1 and 2, the connecting rod (turn buckle 51 and rod member 52) 5 is slidably inserted into the insertion hole 18a of the rotating member 18. In this state, the leveling body 4 is supported via the rotating member 18. For this reason, the leveling body 4 can be rotated in the vertical direction with respect to the machine body 2.

  Then, when the agricultural machine 1 moves forward in the field by the traveling of the tractor, the tiller 3 performs the tilling work, and the leveling body 4 performs the leveling work behind the tiller 3.

  Further, at the time of deep plowing work while the leveling body is held up, as shown in FIGS. 3 to 5, the connecting rod (turn buckle 51 and rod member 52) 5 supports the leveling body 4 in a fixed manner and holds the predetermined level. It is held in the up state.

  That is, the first attachment body 56 at the front end portion of the turnbuckle 51 is attached to the rod connecting portion 20 of the airframe 2 via the shaft 21, and the second attachment body 57 at the rear end portion of the turnbuckle 51 is the leveling body 4. The rod connecting portion 17 is attached to the rear end portion of the rod connecting portion 17 via a shaft 36. Similarly, the front end portion of the rod member 52 is attached to the rod connecting portion 20 of the airframe 2 via the shaft 21, and the rear end portion of the rod member 52 is pivoted to the rear end portion of the rod connecting portion 17 of the leveling body 4. Attached through 36.

  Further, the leveling body 4 is slightly bent and deformed by the shrinking operation of the turnbuckle 51 by the rotation operation of the operation body 55, and the leveling body 4 is not rattled with respect to the body 2 by adjusting the length of the turnbuckle 51. It is fixed in the lifted state.

  Even when the operation body 55 is rotated in the opposite direction and the turnbuckle 51 is extended, the leveling body 4 is fixed in the lifted state so that it does not rattle against the body 2.

  Then, when the farm implement 1 in a state where the leveling body is lifted by the traveling of the tractor moves forward in the field, the tilling body 3 rotates while the leveling body 4 is fixed in the lifting state by the connecting rod 5, thereby deeply plowing work. I do.

  During the deep plowing operation with the leveling body lifted up, the tillage body 3 vibrates, but the gap between the holes 22 and 23 on the front end side of the connecting rod 5 and the shaft 21 or the hole on the rear end side of the connecting rod 5. The leveling body 4 does not rattle due to the gap between the shafts 44 and 45 and the shaft 36.

  And according to such a farming machine 1, when plowing deeper than normal work with the cultivating body 3 with the leveling body 4 in the horizontal lifting state, the length of the turnbuckle 51 is adjusted. Since the leveling body 4 is fixed in the lifted state with respect to the airframe 2 by (elongation or contraction), it is possible to eliminate the backlash and the like of each part, so that the leveling body during deep plowing work with the leveling body in the lifting state 4 can be prevented, and noise can be reduced.

  Further, by simply rotating the operation body 55 of the turnbuckle 51, the leveling body 4 can be appropriately fixed in the lifted state so as not to rattle against the body 2, and the backlash of the leveling body 4 can be prevented appropriately. .

  In the above-described embodiment, the case where two of the four connecting rods 5 are configured with the turnbuckle 51 has been described. The structure etc. which are the turnbuckles 51 may be sufficient, and the number of the turnbuckles 51 is arbitrary.

  Further, the operating body 55 which is the main body of the turnbuckle 51 is not limited to one in which nut portions 61 and 62 are fixed to both ends of the cylindrical portion 60 by welding or the like. For example, screw holes are formed at both ends of the rod-shaped portion. What formed the part etc. may be sufficient.

  Further, the operating body 55 may be one that rotates, for example, by operating the rotary handle portion at the front end portion or the rear end portion.

  Further, for example, the operating body 55 has a first screw shaft portion and a second screw shaft portion whose spiral directions are different from each other, and the first mounting body 56 has a screw hole portion screwed to the first screw shaft portion, For example, the second mounting body 57 may have a screw hole portion screwed into the second screw shaft portion.

  Further, for example, a rod member may be attached to a hole formed in the middle portion of the operation body 55 in the longitudinal direction, and the operation body 55 may be easily rotated by the attached rod member.

  The length-adjustable rod means is not limited to the turnbuckle, and may be composed of other elastic members.

DESCRIPTION OF SYMBOLS 1 Farm work machine 2 Airframe 3 Tillage body 4 Leveling body 5 Connecting rod
51 Turnbuckle as rod means
53 1st screw hole which is the 1st screw part
54 Second screw hole which is the second screw part
55 Operation body
56 First mounting body
57 Second mounting body

Claims (3)

A fuselage connected to the traveling vehicle;
A cultivated body rotatably provided on this machine,
A leveling body provided on the machine body so as to be rotatable in the vertical direction;
A plurality of connecting rods provided between the airframe and the leveling body,
At least one of the plurality of connecting rods is composed of rod means that can be adjusted in length,
When deeply cultivating with the cultivating body while the ground leveling body is in the lifting state, the leveling body is fixed in the lifting state so that the ground leveling body does not rattle against the body by adjusting the length of the rod means. Agricultural machine characterized by being made. When deeply cultivating with the cultivating body while the ground leveling body is in the lifted state, the leveling body is slightly deformed by adjusting the length of the rod means so that the ground leveling body does not rattle. Fixed to the upper state
The agricultural machine according to claim 1. The turnbuckle that is the rod means ,
An operating body having a first screw portion and a second screw portion having different spiral directions,
A first attachment body screwed to the first threaded portion and detachable from the airframe;
Is screwed into the second threaded section, we have a second attached body detachable with respect to the ground leveling member,
The second attachment member is at the time of deep plowing work at ground leveling member lifting state attached to the leveling member during normal working with leveling material free state according to claim 1 or 2, wherein the removing from the ground leveling member Agricultural machine.

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