JP5743313B2 - 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 farm work machine has a machine body connected to the rear part of a tractor that is a traveling vehicle, a cultivating body rotatably provided on the machine body, and is rotatable in the vertical direction around a horizontal axis. And a leveling body provided.

Japanese Patent Laying-Open No. 2005-218316 (FIG. 1)

  However, in the conventional farm work machine, for example, when performing maintenance work of a tillage body (for example, replacement of tillage claws, etc.), the operator manually turns the leveling body upward with respect to the body until the maintenance work state is reached. This lifting operation is particularly burdensome for elderly and female workers because the leveling body is relatively heavy.

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

The agricultural machine according to claim 1 is a machine body, a cultivated body rotatably provided on the machine body, a leveling body provided on the machine body so as to be rotatable in a vertical direction, and the ground leveling body in a soiling work state. a driving means for rotating upwardly with respect to the machine body until maintenance can maintenance state operations of the tillage member from the rod member for supporting the leveling member, the elastic provided in the outer periphery of the rod member And the leveling body is locked with respect to the machine body by the driving means, and the elastic member is compressed to a maximum extent .

  The farm work machine according to claim 2 is the farm work machine according to claim 1, further comprising control means for controlling the drive means, wherein the leveling body is at least a leveling work state based on the control of the drive means by the control means, It is selectively switched between the earthing work state and the maintenance work state.

  The agricultural machine according to claim 3 is the agricultural machine according to claim 2, comprising state display means for displaying whether the leveling body is at least in the leveling work state, the earthing work state, or the maintenance work state. It is.

  According to a fourth aspect of the present invention, in the agricultural machine according to the third aspect, the state display means follows the indicated portion with a state display mark and the indicated portion according to a change in the state of the leveling body. And an instruction unit that moves.

  According to a fifth aspect of the present invention, there is provided the agricultural machine according to any one of the first to fourth aspects, further comprising a lock unit that locks the leveling body relative to the body when the leveling body is in a maintenance work state.

  According to the present invention, since the ground leveling body is provided with the driving means for rotating upward with respect to the machine body until the maintenance work state in which the maintenance work of the tillage body is possible, the operator manually places the leveling body in the maintenance work state. It is not necessary to rotate upward until it becomes, and the burden on the operator 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 at the time of the leveling body maintenance work state of an agricultural working machine same as the above. It is a side view at the time of the leveling body earthing work state of a farm working machine same as the above. It is a side view at the time of the leveling body leveling work state of the agricultural working machine same as the above. It is a side view at the time of the leveling body free state of a farm working machine same as the above. It is a front view which shows the instruction | indication part and to-be-instructed part of the state display means of an agricultural working machine same as the above.

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

  1 to 5, reference numeral 1 denotes an agricultural working machine. The agricultural working machine 1 is a tillage level working machine (rotary) used by being connected to a rear portion of a tractor (not shown) that is a traveling vehicle, for example. That is, the agricultural working machine 1 is a rotary tiller that performs tilling work and earthing work while moving on the field toward the front which is the traveling direction by traveling of the tractor while being connected to the rear part of the tractor.

  The farm work machine 1 includes a machine body 2 connected to a three-point link (work machine lifting device) at the rear of a tractor (not shown), and is provided rotatably on the machine body 2 while receiving power from the tractor side and rotating in a predetermined direction. At the rear end of the tilling body 3 that performs the tilling work and the tilling cover portion 6 of the machine body 2 is provided so as to be pivotable in the vertical direction about a horizontal axis (rotation fulcrum) 7 and mainly behind the tilling body 3. And a single plate-shaped leveling body (level plate) 4 that performs leveling work.

  The machine body 2 has a frame pipe portion 11 that is a longitudinally-shaped and cylindrical frame portion. A gear box portion 12 is provided at a central portion in the left-right direction of the frame pipe portion 11, and an input shaft 13 projects forward from the gear box portion 12. The input shaft 13 is connected to a PTO shaft (not shown) of the tractor via transmission means (not shown) configured by a universal joint, a transmission shaft, and the like.

  An upper portion of a chain case portion 16 that is a box-shaped transmission case portion is attached to a left end portion that is one longitudinal end portion of the frame pipe portion 11. An upper portion of a plate-like bracket portion 17 is attached to the right end portion, which is the other longitudinal end portion of the frame pipe portion 11. The tiller 3 is rotatably mounted on the chain case portion 16 and the bracket portion 17 that are spaced apart from each other.

  Further, the tillage cover portion 6 of the machine body 2 has a curved plate-like cover body plate 18 that covers the upper portion of the tillage body 3, and cover side plates 19 provided at both left and right ends of the cover body plate 18. ing. And the front-end part (upper end part) of the leveling body 4 is attached to the rear-end part of the cover main-body board 18 of the tilling cover part 6 so that rotation is possible centering on the axis | shaft 7. FIG.

  The cultivating body 3 has a rotation shaft 21 that is a cultivating shaft in the left-right direction rotatably supported by a lower portion of the left chain case portion 16 and a lower portion of the right bracket portion 17. The rotating shaft 21 receives power from a transmission means (not shown) constituted by a transmission shaft in the frame pipe portion 11 and a chain in the chain case portion 16 and rotates. A plurality of tilling claws 22 for performing a tilling operation while rotating together with the rotating shaft 21 are detachably attached to the rotating shaft 21.

  The leveling body 4 has a leveling main body plate 23 attached to the rear end portion of the cover main body plate 18 of the tilling cover portion 6 so as to be pivotable in the vertical direction about the shaft 7. On the left and right sides of the upper surface of the leveling main plate 23, opposed plates 24 that are spaced apart from each other are erected in pairs.

  Further, the agricultural working machine 1 includes a drive means 31 that can be expanded and contracted to rotate the ground leveling body 4 upward with respect to the machine body 2 until it becomes a maintenance work state in a horizontal posture in which the maintenance work of the tilling body 3 can be performed. Control means 32 for controlling 31 and locking means 33 for releasably locking the leveling body 4 with respect to the machine body 2 when the leveling body 4 is in a maintenance work state. Note that, for example, an operating means 34 for remotely operating the driving means 31 by an operator on a tractor is electrically connected to the control means 32 via a wire or wirelessly.

  Then, based on the control of the drive means 31 by the control means 32, the leveling body 4 is adjusted to the leveling work state, the earthing work state (locked state), the maintenance work state (locked state) and the free according to the expansion and contraction of the drive means 31. Is selectively switched to a state. In other words, the leveling body 4 is rotated up and down by the power output from the driving means 31 instead of the human power of the operator, and can be switched to each of the four states. Further, based on the control of the driving means 31 by the control means 32, the ground pressure of the leveling body 4 when the leveling body 4 is leveled can be adjusted steplessly.

  The drive means 31 is composed of, for example, an electric hydraulic cylinder in which a DC motor, a hydraulic pump, a hydraulic valve and a hydraulic cylinder are integrated. The electric hydraulic cylinder itself expands and contracts so that the leveling body 4 is moved with respect to the machine body 2. Thus, the shaft 7 is rotated in the vertical direction. The drive means 31 has a cylinder body 36 and a rod part 37 that goes in and out of the cylinder body 36.

  A front end portion of the cylinder main body 36 is attached to a plate-like cylinder attachment portion (driving means attachment portion) 38 fixed to the gear box portion 12 of the machine body 2 so as to be rotatable about a shaft 39. The rear end portion of the rod portion 37 rotates around a shaft 43 around a rod mounting portion 42 of a rotating frame (support frame) 41 that is a rotating body that rotates relative to the machine body 2 in conjunction with the expansion and contraction of the driving means 31. It is mounted movably. The rotating frame 41 is substantially U-shaped in a plan view and has mounting plate portions 45 at two front end portions, and each of the mounting plate portions 45 is fixed to the frame pipe portion 11 of the machine body 2. Is attached to a frame-shaped frame mounting portion 46 so as to be rotatable about a shaft 47.

  That is, the rotating frame 41 includes a pair of left and right opposing frame portions 48 that are spaced apart from each other in the front-rear direction and a mounting plate portion 45 fixed to the front end portion of each of the opposed frame portions 48. A connecting frame portion 49 having a rectangular tube shape in the left-right direction connecting the rear ends of both opposing frame portions 48, a rod mounting portion 42 fixed to the center portion in the left-right direction of the connecting frame portion 49, and a connection Rotating member mounting portions 50 fixed to both ends in the left-right direction of the frame portion 49 are provided.

  A cylindrical turning member (tumbler) 51 is rotatably attached to each of the left and right turning member attachment portions 50 of the turning frame 41. A first rod (lifting adjustment rod) 53 that is a rod member that supports the leveling body 4 is slidably inserted into the rod insertion hole 52 formed in the rotating member 51.

  A retaining portion 54 is provided at the upper end of the first rod 53. The lower end portion of the first rod 53 is attached to the rear end portion of the opposing plate 24 of the leveling body 4 so as to be rotatable about the shaft 55. Further, the leveling body 4 is directed downward on the lower outer periphery of the first rod 53, that is, on the outer periphery of the portion of the first rod 53 located below the rotating member 51 when the leveling body 4 is in the leveling operation state. A first coil spring 56, which is an elastic member for biasing the leveling body, and a collar 57, which is a cylindrical member, are provided. A second coil spring 58, which is a buffering elastic member, is provided on the upper outer periphery of the first rod 53, that is, on the outer periphery of the portion of the first rod 53 positioned above the rotating member 51.

  A cylindrical rotating member (tumbler) 61 of the locking means 33 is rotatably attached to the front end portions of the left and right opposing plates 24 of the leveling body 4. A second rod (lower limit rod) 63 that is a rod member that supports the leveling body 4 is slidably inserted into the rod insertion hole 62 formed in the rotating member 61.

  A retaining portion 64 is provided at the rear end portion of the second rod 63. A front end portion of the second rod 63 is attached to a rod attachment portion 66 fixed to the frame pipe portion 11 of the body 2 so as to be rotatable about a shaft 65. A third coil spring 68, which is an elastic member for buffering, is provided on the rear outer periphery of the second rod 63, that is, on the outer periphery of the portion of the second rod 63 located behind the rotating member 61. Yes.

  The locking means 33 is, for example, as described in Japanese Patent Application Laid-Open No. 2005-218316, and is provided on the rotating member (rod inserted body) 61, the main body member 71, and the main body member 71 so as to be vertically movable. A stopper pin 72, which is a lock pin, and an operation lever 73 provided rotatably on the main body member 71 (see FIG. 2).

  In addition, the agricultural machine 1 includes a state display unit 80 that displays whether the leveling body 4 is in the leveling work state, the earthing work state, the maintenance work state, or the free state. The state display means 80 is provided at a position where it can be seen by an operator on the tractor, for example.

  As shown in FIG. 6, the state display means 80 includes a pointed portion 82 with state display marks (scales) 81 a to 81 g on the surface, and the state of the leveling body 4 based on the vertical rotation of the leveling body 4. And an instruction unit 83 that moves along the surface of the instructed unit 82 in accordance with the change.

  The indicated portion 82 is constituted by a curved plate-like fixing plate 84 fixed to the cylinder mounting portion 38 of the machine body 2. On the upper surface, which is the surface of the instructed portion 82, in addition to the state display marks 81a to 81g that are line displays, the character display “lock” indicating the earthing work state (the earthing lock state), and the free state “ Character display of “free”, character display of “bounce-up” indicating the maintenance work state (bounce-up state), character display of “spring pressurization”, and the level of the ground pressure of the leveling body 4 during the leveling work state of the leveling body 4 A numerical display of “1” to “5” is attached. Note that the ground pressure gradually increases from the “1” side toward the “5” side.

  In addition, the instruction unit 83 is configured by a part of interlocking means 85 that interlocks with the vertical rotation of the rotation frame 41. The interlocking means 85 includes a fixed shaft 86 fixed to the mounting plate 45 on one side of the rotating frame 41, a first connecting member 87 rotatably connected to the fixed shaft 86, and the first connecting member 87. And a second connecting member 88 rotatably connected to the second connecting member 88. The second connecting member 88 is rotatably attached to the side surface of the cylinder attachment portion 38 of the body 2. The second connecting member 88 has an arrow-shaped plate portion 89 facing the pointed portion 82, and the plate portion 89 constitutes the pointing portion 83.

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

  FIG. 2 shows a maintenance work state (bounce-up state) of the leveling body 4.

  The maintenance work state of the leveling body 4 is a state (locked state) in which the leveling body 4 is rotated upward to a predetermined upper limit position by the contraction operation of the driving means 31 to be in a horizontal posture. It is in a state where the whole is exposed rearward and maintenance work of the tillage body 3 by the operator is possible.

  In this state, the leveling body 4 is locked to the machine body 2 by the driving means 31 and the locking means 33, and the rotating member 51 is in contact with the second coil spring 58. At this time, the instruction section 83 of the state display means 80 indicates the position between the state display mark 81g and the end portion (the lower end portion in FIG. 6) of the instructed portion 82.

  In this state, the operator performs maintenance work of the tillage body 3 (for example, replacement and cleaning of the tilling claws 22), cleaning of the lower surface of the tillage cover 6, and cleaning of the work surface of the leveling body 4.

  FIG. 3 shows the earthing work state (locked state) of the leveling body 4.

  The earth leveling work state of the leveling body 4 is a state (locked state) in which the leveling body 4 is rotated downward to a predetermined lower limit position by the extension operation of the driving means 31 to be in a vertical posture (locked state). 4 is the state which performs the earthing | working operation | work which draws the soil of a farm field behind the tillage body 3. FIG.

  In this state, the leveling body 4 is locked to the machine body 2 by the driving means 31, and the rotating member 61 is in contact with the third coil spring 68. Further, in this state, the first coil spring 56 is sandwiched between the rotating member 51 and the collar 57 and is compressed to a maximum extent. At this time, the instruction section 83 of the state display means 80 indicates the position between the state display mark 81a and the end portion (upper end portion in FIG. 6) of the instructed portion 82.

  In this state, when the entire farm work machine 1 is moved by running the tractor, the earthing work is performed by the leveling body 4 in the earthing work state.

  FIG. 4 shows the leveling work state of the leveling body 4.

  The leveling work state of the leveling body 4 is a state in which the leveling body 4 can be rotated in the vertical direction within a predetermined range with respect to the machine body 2, and the leveling body 4 has a ground contact pressure that is set in advance. This is a state of leveling work to level the farm scene in the rear. In the state of FIG. 4, the instruction unit 83 of the state display means 80 indicates a state display mark 81 c corresponding to “4” of spring pressurization.

  The ground pressure of the leveling body 4 set in advance, that is, the downward biasing force (spring pressurization) received by the leveling body 4 from the compressed first coil spring 56 during the tilling work, is caused by the expansion and contraction of the driving means 31. It can be adjusted. In other words, the operator sets the ground pressure of the leveling body 4 by operating the operating means 34 according to the soil quality and the like of the field to expand and contract the driving means 31.

  In this state, when the entire farm work machine 1 is moved by running the tractor, the tilling work is performed by the tiller 3 and the leveling work is performed by the leveling body 4.

  FIG. 5 shows a free state of the leveling body 4.

  The free state (non-working state) of the leveling body 4 is a state where the leveling body 4 is located at a free position within a predetermined range. This free position is a position from the position at which the first coil spring 56 is in the natural length (non-compressed state) to immediately before the leveling body 4 is in the maintenance work state. At this time, the instruction unit 83 of the state display means 80 indicates a position between the state display mark 81f and the state display mark 81g.

  Basically, the leveling work is not performed by the leveling body 4 when the leveling body 4 is in a free state, but the leveling work can be performed by setting the leveling body 4 to a free state depending on the state of the field.

  And according to such a farming machine 1, it is provided with the drive means 31 which rotates the comparatively heavy leveling body 4 upward with respect to the body 2 until it will be in the maintenance work state in which the maintenance work of the tilling body 3 is possible. Unlike the conventional case, it is not necessary for the operator to manually rotate the leveling body until it enters the maintenance work state, so that the burden on the operator can be reduced, and thus, for example, for an elderly worker or a female worker. Convenience is good.

  Further, since the leveling body 4 is selectively switched to at least the leveling work state, the earthing work state, and the maintenance work state based on the control of the driving means 31 by the control means 32, the state of the leveling body 4 can be easily switched. This can further reduce the burden on the operator.

  Further, since the leveling body 4 is provided with a state display means 80 for displaying at least one of the leveling work state, the earthing work state, and the maintenance work state, the state of the leveling body 4 can be seen by looking at the state display means 80. Can be easily confirmed and the burden on the operator can be further reduced.

  Further, since the ground leveling body 4 is provided with the lock means 33 for locking the leveling body 4 to the machine body 2 when the leveling body 4 is in the maintenance work state, the leveling body 4 in the maintenance work state is doubled by the lock means 33 and the driving means 31 It can be locked and has excellent safety.

  The drive means 31 is not limited to an electric hydraulic cylinder, and may be a hydraulic cylinder, an electric cylinder, a hydraulic motor, an electric motor, or the like.

  Further, the agricultural machine 1 is not limited to the configuration provided with the single drive means 31 provided in the center of the machine body 2, and may be a configuration provided with a plurality of drive means 31.

  Furthermore, the state display means 80 is preferably provided at a position where it can be seen by an operator who rides on the tractor, but may be provided at a position where it can be seen by an operator who gets off the tractor, for example.

DESCRIPTION OF SYMBOLS 1 Farm work machine 2 Airframe 3 Tillage body 4 Leveling body
31 Drive means
32 Control means
33 Locking means
53 The first rod which is a rod member
56 1st coil spring which is an elastic member
80 Status display means
81a to 81g Status indicator
82 Directed part
83 Indicator

Claims (5)

The aircraft,
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;
Drive means for rotating the leveling body upward from the ground until the maintenance work state in which the maintenance work of the tillage body is possible from the earthing work state ;
A rod member for supporting the leveling body;
An elastic member provided on the outer periphery of the rod member;
An agricultural working machine , wherein the leveling body is locked to the machine body by the driving means when the leveling body is in the earthing work state, and the elastic member is compressed to a maximum extent . Comprising control means for controlling the drive means;
2. The agricultural working machine according to claim 1, wherein the leveling body is selectively switched to at least a leveling work state, a soil evacuation work state, and a maintenance work state based on the control of the driving means by the control means. The agricultural work machine according to claim 2, further comprising state display means for displaying whether the leveling body is in at least one of a leveling work state, a earthing work state, and a maintenance work state. The status display means
An indicated part with a status display mark; and
The agricultural machine according to claim 3, further comprising: an instruction unit that moves along the instructed unit in accordance with a state change of the leveling body. The agricultural working machine according to any one of claims 1 to 4, further comprising: a lock unit that locks the leveling body with respect to the machine body in a maintenance work state of the leveling body.

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