JP2011103850A - Mowing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mowing implement capable of working with a working part offset and easily performing adjustment of the reaping work part position, posture and the like, and easily attachable to a tractor. <P>SOLUTION: There is provided a mowing implement having a reaping work section 5 at the moving end side of an offset mechanism 6 composed of a parallel link keeping the rotation base set on a tractor applied part 2, which offset mechanism 6 is movable by extension/contraction of an offset electric cylinder 63, which reaping work section 5 is freely rotatable in a vertical direction of the crossing direction against the tractor travelling direction by extension/contraction of a reaping section rotating electric cylinder 54, and is equipped with a confirmation gauge capable of confirming the rotation amount by visual observation from a tractor operating seat and the extension/contraction of each electric cylinder can be remote-controlled with an electric operation section set on the operating seat. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an agricultural machine that is attached to a tractor and performs mowing work.

  Japanese Patent Laid-Open No. 60-62904 (Prior Art 1) or Japanese Patent Laid-Open No. 6-253603 (Prior Art 2) is disclosed as a prior art of this type of cutting device.

  Japanese Patent Laid-Open No. 60-62904 (Prior Art 1) states that “a mast frame is attached to a tractor, and the mast frame has an auxiliary support case that moves up and down by protruding from the side of the tractor. For orchards where a management work machine such as a mowing tool, a middle plowing tool, or a drilling tool is detachably provided on the output shaft protruding downward from the output shaft, and the work position of the management work machine is provided variably with respect to the mast frame In the “control machine”, the work height is determined by a three-point link according to the trunk terrain of the fruit tree, the work inclination is determined by the first cylinder 19, and the work position protrusion amount from the tractor is determined by the second cylinders 20 and 20a. “Perform” or “Orchard Management Machine”.

  Japanese Patent Laid-Open No. 6-253603 (Prior Art 2) states that “a cultivator with a support wheel on the side of the traveling vehicle body, the height of which is lower than that of the traveling vehicle body. Disclosure of an orchard cultivator, which is attached via a protrusion adjustment mechanism capable of adjusting the degree of protrusion, and is provided with a plowing depth adjusting mechanism that adjusts the plowing depth of the rotary of the middle plow body. Has been.

JP 60-62904 A (Prior Art 1) JP-A-6-253603 (prior art 2)

  In the case of a mowing machine that is attached to a tractor, it is necessary to work by offsetting the cutting part to the side of the tractor in order to weed the field around trees such as orchards without hindering the lower branches. . In addition, when the mowing operation part is located behind the tractor, there is a problem that the grass before mowing is stepped over by the tire of the tractor, and there remains a problem that the mowing is left behind, which can be solved by offsetting the work. However, since it is inconvenient to move and store the working unit in a state where the working unit is always offset laterally from the tractor when not working, it is necessary to have a structure that can be switched between the offset state and the non-offset state. It is necessary to have a mechanism for making it move, and it is necessary to have power for making it offset.

  For this reason, although there exists a thing like the said prior art 1 or the prior art 2, it has a structure which operates by using a hydraulic cylinder for offset movement etc., respectively. For this reason, it is necessary to provide a hydraulic pressure take-out part and a hydraulic valve on the tractor side, and there is a problem that it cannot be easily attached to any tractor. In addition, when the operator can arbitrarily change the position of the working part, it can be changed to a position corresponding to various situations, but on the other hand, when it is not clear which position should be set, In such a state, there is a problem in handling that the posture of the working unit is difficult to understand.

  For this reason, an object of the present invention is a mowing work machine that can perform work by offsetting the working part, can easily adjust the position and posture of the mowing work part, and does not require skill in the work. An object is to provide a mowing machine that is easy to install.

  In order to solve the above-described problems, a mounting unit mounted on a tractor that is a traveling machine body, an offset mechanism unit configured by a parallel link that is provided with a rotation base in the mounting unit and is movable in the left-right direction, and the offset mechanism On the side of the moving part, there is provided a cutting work section in which a plurality of cutting blades are provided on a horizontal rotation axis perpendicular to the advancing direction rotated by the power from the tractor so as to be swingable. The mechanism part is movable in the left-right direction by expansion and contraction of an electric cylinder that is rotatably connected between the mounting part side and a turning arm that constitutes a parallel link. It can be rotated in the vertical direction in the direction perpendicular to the tractor traveling direction on the end side, and it can be rotated by expansion and contraction of an electric cylinder that is rotatably connected between the offset mechanism part side and the mowing work part side. To propose a mowing machine is characterized in that is.

  In addition, the mowing working part is provided with a confirmation gauge for visually confirming from the tractor driver's seat the amount by which the mowing working part pivots in the vertical direction, and the electric cylinder that pivots the mowing working part in the vertical direction. The mowing working machine described in the column 0009 is proposed, which can be remotely operated by an electric operation unit provided in the driver's seat.

  According to the present invention, the cutting mechanism can be offset to the side of the tractor by the offset mechanism configured by the parallel link movable in the left-right direction, and the grass before cutting is not stepped on by the tire of the tractor. In addition, it is possible to avoid the occurrence of leftovers and to improve cutting performance, and to perform cutting over the entire area from the rear position of the tractor to the maximum offset position to the side, and it is structured by an offset mechanism composed of parallel links. However, it is simple and easy to maintain, and the production cost can be kept low. In addition, since the cutting work unit is rotatable in the vertical direction in the direction orthogonal to the tractor traveling direction on the offset mechanism unit moving end side, the work surface on the offset side is inclined upward and downward from the horizontal position. It is possible to work variously.

  Further, the mowing work part can be moved in the left-right direction by expansion and contraction of an electric cylinder that is pivotably connected between the mounting part side and a turning arm that constitutes a parallel link, and at the moving end side of the offset mechanism part. Since it is configured to be rotatable by extending and contracting the electric cylinder in the vertical direction perpendicular to the direction of travel of the tractor, it is not configured to use a hydraulic cylinder as in the past, so a hydraulic take-out part and hydraulic valve are installed on the tractor side. Since it is not necessary, it can be mounted regardless of the specifications on the tractor side.

  In addition, the mowing operation part is provided with a confirmation gauge that allows the tractor driver's seat to visually check the amount of rotation by which the mowing work part rotates in the vertical direction. Since the remote control can be performed by the electric operation unit provided in the vehicle, the posture of the mowing operation unit can be easily confirmed and can be easily adjusted from the driver's seat.

The side view of the mowing working machine which implemented this invention. The top view of the state which located the mowing working machine which implemented this invention behind the tractor. The top view of the state which offset the mowing working machine which implemented this invention to the tractor side. The principal part front view of a mowing work part. The principal part front view of the mowing work part which turned the mowing work part upwards and inclined. The principal part front view of the mowing work part which turned the mowing work part downward and inclined. The principal part side view which cut and cut the cutting work part. The power system explanatory drawing of the mowing working machine which implemented this invention. The wiring diagram of an electric cylinder.

  Embodiments of the present invention will be described below with reference to the following drawings. FIG. 1 is a side view of a mowing work machine according to the present invention, FIG. 2 is a plan view of the mowing work machine located behind the tractor, and FIG. 3 is a state in which the mowing work machine is also offset to the tractor side. 4 is a front view of the main part of the mowing work part, FIG. 5 is a front view of the main part of the mowing work part in which the mowing work part is rotated upward and tilted, and FIG. 6 is a lower part of the mowing work part. FIG. 7 is a sectional side view of the main part of the mowing work unit, FIG. 8 is an explanatory diagram of the power system of the mowing machine of this example, and FIG. 9 is the mowing work of the present example. The wiring diagram of the electric cylinder of the machine is shown.

  The mowing work machine shown in this example is mounted on a three-point link hitch mechanism provided at the rear of the tractor 1 and is used by driving the mowing work unit 5 with power from the tractor 1. Further, the mowing operation unit 5 is provided so as to be movable to the left and right with respect to the tractor 1 and can be operated on one side of the rear side of the tractor 1. It is possible to carry out forward cutting without stepping on.

  The mowing working machine of this example is provided with a mounting portion 2 for mounting to the tractor 1 at the front portion, and a mowing operation portion 5 is provided behind the mounting portion 2, and the mounting portion 2 and the mowing work portion 5 are offset mechanism portion 6. It is connected through. The offset mechanism unit 6 is configured by a parallel link in a plan view, and the front end of the parallel link is rotatably connected to the mounting unit 2 side, and the rear end side thereof is rotatably connected to the mowing work unit 5 side. Even if it moves to the left or right, the orthogonal posture is not changed with respect to the traveling direction.

  A three-point link hitch mechanism comprising a pair of left and right lower links 11 provided at the rear of the tractor 1 and a top link 10 provided at the upper center thereof is provided at the lower left and right of the mounting portion 2 provided in front of the mowing machine. A lower link pin 20 is connected to the lower link 11 and a top link pin 21 provided on the top of a mast frame 22 formed in a gate shape from the left and right lower link pin 20 portions to connect the top link 10 to the tractor. Attach a mowing machine to 1. The lower link pin 20 in this example is provided at a position below the mast frame 22 so as to face inward.

  The mowing unit 5 is provided with a bevel gear case 3 that is a power input unit at an upper portion on one side of the mowing unit, and an input shaft 30 that protrudes forward from the bevel gear case 3 is illustrated. Power is extracted from the tractor 1 and driven by being connected by the universal joint 12 and the tractor PTO shaft that is not present.

  As shown in the power system explanatory diagram of FIG. 8, the bevel gear case 3 converts and shifts the power input to the input shaft 30 in the lateral direction of the traveling direction by the internal bevel gear 31. The converted power is transmitted from one side of the bevel gear case 3 to the side end of the cutting unit 5 by the horizontal output shaft 32. An output pulley 40 is fixed to the tip of the output shaft on the side end portion side, and further, an input pulley 41 fixed to the end of the rotary shaft 50 of the cutting work unit 5 is provided below the output pulley 40, The power input to the input shaft 30 by the transmission belt 42 stretched around these pulleys is transmitted to the rotary shaft 50 of the cutting work unit 5 and is driven to rotate. The pulley and the transmission belt portion are covered and guarded by a belt cover 4.

  The mowing operation unit 5 is provided with a plurality of mowing blades 51 that can swing freely on a horizontal rotating shaft 50 that is orthogonal to the tractor traveling direction, and passes above the rotating shaft 50 and scoops up from the front to the rear. And weeds are cut and crushed. The upper portion of the outer periphery of the cutting blade 51 rotation trajectory is covered with a cutting portion cover 52 to prevent scattering of cut weeds and the like, and to move some of the cut weeds around the rotation shaft 50 and further It is provided to be crushed finely.

  A gauge roller 7 is provided in the lower rear part of the mowing operation unit 5 to maintain the ground height on the rear side of the mowing operation unit 5. The gauge roller 7 is rotatably held at its left and right ends by a mounting plate 70 extending rearward from the left and right side plates of the cutting work unit 5 and can be adjusted in height depending on the mounting position of the mounting plate 70 on the side plate. .

  The offset mechanism unit 6 that moves the mowing unit 5 to the left and right is connected to the mounting unit 2 so that the front end side is horizontally rotatable and extends rearward, and one end rotates to the mounting unit side. An offset electric cylinder 63 that is horizontally connected to the moving arm 60 side and rotates the rotating arm 60 in the horizontal direction by its extending and contracting operation, and the cutting working unit 5 on the rotating end side of the rotating arm 60. The rotary arm 60 is provided in a pair parallel to the left and right, the front end is on the mounting portion 2 side, and the rear end side is on the cutting work portion holding bracket 64 on the cutting work portion 5 side. Each of them is connected by a front rotation shaft 61 and a rear rotation shaft 62 provided in the vertical direction to form a parallel link, and the cutting work section 5 is located on the side of the tractor shown in FIG. 3 from the rear position of the tractor shown in FIG. ~ side Orthogonal orientation of the cutting work portion against horizontal movement direction of travel be made towards is configured not to change. Since it is composed of an offset mechanism using parallel links, the structure is simple and the manufacturing cost can be reduced.

  The mowing work section holding bracket 64 is held in a horizontal link manner by a vertical rear pivot shaft 62 on the pivot end side of the pivot arm 60 so as to be horizontally pivotable, and in parallel with the traveling direction. The cutting unit rotating shaft 53 provided horizontally holds the cutting unit 5 so as to be rotatable in the vertical direction on a surface orthogonal to the traveling direction. A mowing part rotating electric cylinder 54 is connected to the mowing work part 5 side and the mowing work part holding bracket 64 side so that both ends are rotatable, and an electric operation part (not shown) provided near the tractor 1 driver's seat. The mowing part rotating electric cylinder 54 is operated by operating to extend and retract, whereby the mowing part 5 can be rotated up and down around the mowing part rotating shaft 53. By rotating the mowing operation unit 5 up and down, weeds and the like on an inclined surface that is inclined sideways up and down with respect to the traveling surface of the tractor 1 can be mowed.

  The up-and-down rotation of the mowing operation unit 5 is rotated about the mowing unit rotation shaft 53 provided horizontally with respect to the mowing operation unit holding bracket 64 in parallel with the traveling direction. The reaping part rotation shaft 53 is provided on the reaping work part 5 side, and is fitted to and rotated by a boss provided on the reaping work part holding bracket 64. One end of the cutting cylinder turning electric cylinder 54 is rotatably attached to the cutting work section 5 side. On the other hand, the other end is a first link arm 56 having one end pivotably attached to the cutting work holding bracket 64 side and a second link arm 57 having one end pivotally attached to the mowing working part 5 side. When the electric cylinder 54 for rotating the mowing part is contracted, the mowing part 5 is pivoted upward as shown in FIG. When extended, it rotates downward as shown in FIG.

  A confirmation gauge 55 that can confirm the expansion / contraction position of the cylinder is provided on the front side of the electric cylinder 54 for turning the cutting part. The confirmation gauge 55 is displayed with a scale indicating the state of the expansion / contraction length of the cylinder. The display plate 550 includes a pointer 55 provided on the end of the first link arm 56 on the side of the cutting cylinder rotating electric cylinder 54, and the display plate 550 has one end of the cutting cylinder rotating electric cylinder 54 on the cutting working section 5. One end is held by a pivoting fulcrum portion that is pivotally attached to the side, and a long hole provided in parallel with the cutting cylinder pivoting electric cylinder 54 is provided at the other end side where the scale is attached. The connecting fulcrum portion of the first link arm 56 and the second link arm 57 of the cutting portion rotating electric cylinder 54 is inserted and provided in the elongated hole. When the mowing portion rotating electric cylinder 54 expands and contracts, the connecting fulcrum portion of the first link arm 56 and the second link arm 57, that is, one end side of the mowing portion rotating electric cylinder 54 moves through the elongated hole of the display plate 550. The pointer 551 of the one link arm 56 moves the scale portion of the display plate 550 to display the state of the expansion / contraction length of the cylinder. The scale portion is provided toward the front side where the driver who rides on the tractor 1 can visually check, and the driver can always check the inclination of the mowing unit by the scale. When the mowing unit 5 is used only in a horizontal state or when it is moved, the first link arm 56 and the mowing unit holding bracket 64 are provided with lock pin holes 58 for overlapping the mowing unit 5 in the horizontal position. It is also possible to fix the rotation by inserting a pin.

  As shown in the electric cylinder wiring diagram of FIG. 9, the telescopic operation of the offset electric cylinder 63 and the cutting part rotating electric cylinder 54 is to operate the selector switch 90 of the electric operating part 9 provided near the tractor 1 driver's seat. It can be operated by switching to the electric cylinder side and operating the rotation switch 91 in the direction of expansion or contraction. When the change-over switch 90 is switched, the power of the battery 94 is supplied to either the offset relay 92 or the rotation relay 93 so that it can be operated. By operating the rotation switch 91, each relay is activated and mowing work is performed. The machine-side offset electric cylinder 63 or the mowing part rotating electric cylinder 54 is expanded and contracted. Since the adjustment of the position and the rotation posture of the mowing operation unit 5 is configured by expansion and contraction of each electric cylinder and is not a configuration using a hydraulic cylinder, a hydraulic extraction unit and a hydraulic valve are not required on the tractor 1 side. Easy to install regardless of the specifications on the tractor side.

  The offset mechanism portion 6 is connected to the mounting portion 2 on the front end side through a connection bracket 23 to a lower portion on the left and right sides of the mast frame 22 formed in the portal shape of the mounting portion 2. The rotary arm 60 is held on the rear side by a front rotary shaft 61 provided in the vertical direction, and one end on the front side of the connecting bracket 23 is held by the horizontal vertical rotary shaft 230 orthogonal to the traveling direction. The mast frame 22 is connected to the mast frame 22 so as to be rotatable in the front-rear direction. The front / rear rotation angle is regulated within a certain range, so that the mowing work part 5 can swing back and forth within a certain range with respect to the mounting part 2 and can follow the unevenness of the working field. Yes.

  A lower restricting means 8 for preventing the mounting portion 2 from being lowered too much at the lower portion on one side of the left and right sides of the mast frame 22 formed in the gate shape of the mounting portion 2, which is opposite to the connecting bracket 23 mounting side. Is inserted into the holder 81 formed in the shape of a vertical pipe fixedly attached to the mast frame 22 and the upper one end side of the guide shoe 80 formed of pipe material in an L shape in side view is inserted into the holder 81 with a fixing pin. The lowering restricting means 8 is configured such that the lower end is slid on the field scene and held. Vertical adjustment can be performed by providing an adjustment hole in the guide shoe 80 so that the insertion position of the fixing pin can be changed. In this example, the guide shoe 80 is not provided on the connection bracket 23 side, but it may be provided on the left and right of the mast frame 22, and the lower sliding portion of the guide shoe 80 is a rotating body such as a gauge wheel. You may comprise.

  A gauge roller 7 that stabilizes the cutting height is provided at the lower rear part of the cutting operation unit 5, and the mounting unit 2 is provided with a lowering restricting means 8 that controls the lowering position of the mounting unit 2. The posture in the front-rear direction of the mowing working unit 5 provided between the rear gauge roller 7 and the front lowering restricting means 8 is stabilized.

  If the mounting portion 2 held by the three-point link mechanism of the tractor 1 is lowered too much, the posture of the mowing operation portion 5 is inclined forward, resulting in inconvenience that affects the mowing height and the mowing performance. In particular, the three-point link mechanism of the tractor tends to descend as the mowing unit 5 moves away from the tractor 1 due to the offset mechanism or the like. It is necessary to maintain the height, but it is necessary to frequently raise and lower the mowing work machine by changing the direction during the work, and it is necessary to adjust the descent position each time, and in the state where it is on the tractor It is difficult to determine the descent position from above, and adjustment is difficult. By providing the descent restriction means 8, it is possible to easily adjust the descent position, improving work efficiency and requiring no skill in mowing machine performance. Can be fully demonstrated.

  Next, the operation of the mowing machine according to the present invention will be described. Mounted on the tractor 1 by the mounting portion 2 provided at the front portion of the mowing working machine, the input shaft 30 of the bevel gear case 3 provided on the side upper portion of the mowing working portion 5 and the tractor PTO shaft are connected by the universal joint 12, It is rotated by the power from the tractor 1. The power of the input shaft 30 is converted by the bevel gear inside the bevel gear case 3 and the rotational power is converted and shifted in the lateral direction of the traveling direction, and the power is transmitted to the side end side by the output shaft 32. An output pulley 40 is fixed to the tip of the output shaft 32 at the side end opposite to the bevel gear case 3, and an input pulley 41 fixed to the end of the rotary shaft 50 of the cutting work unit 5 is provided below the output pulley 40. The power transmitted by the output shaft 32 by the transmission belt 42 that is provided on these pulleys is transmitted to the rotating shaft 50 of the cutting work unit 5 and is driven to rotate. The rotary shaft 50 is provided with a plurality of cutting blades 51 in a swingable manner so that weeds and the like that have been cut pass through the rotary shaft 50 so as to scoop up from the front to the rear, The weeds are cut and crushed by the progress of the tractor. The upper part of the outer periphery of the cutting locus of the cutting blade 51 is covered with the cutting portion cover 52 to prevent scattering of cut weeds and the like, and a part of the cut weeds is rotated by the action of the scooping surface of the cutting blade 51. Bring it around the shaft 50 to crush it further.

  The tractor is moved to the left and right by operating the switch of the electric operation unit 9 provided in the vicinity of the driver seat of the tractor 1 to expand and contract the electric cutting cylinder 63 of the offset mechanism unit 6 with respect to the mounting unit 2. Work by adjusting the offset position from 1. By cutting the tractor 1 from the tire side of the tractor 1 and moving the tractor 1 on the field surface after cutting the tractor 1, the cutting unit 5 is positioned on the uncut portion and the operation is performed. However, it is possible to prevent occurrence of uncut residue caused by stepping over weeds or the like in an unworked part. By operating the selector switch 90 of the electric operation unit 9 to the operation side of the offset electric cylinder 63 and operating the rotation switch 91, the offset electric cylinder 63 is expanded and contracted to adjust the offset position.

  The mowing unit 5 is offset from the tire side of the tractor 1 and the mowing unit rotating electric cylinder 54 is expanded and contracted by operating the switch of the electric operating unit 9 so that the mowing unit 5 is orthogonal to the traveling direction. By turning up and down in the direction in which the tractor 1 moves, mowing work on the slope of the side portion that is inclined up and down with respect to the traveling surface of the tractor 1 becomes possible. The switch 90 of the electric operation unit 9 is switched to the operation side of the electric cylinder 54 for cutting part rotation, and the electric switch 54 for operating the cutting part rotation is expanded and contracted by operating the rotation switch 91.

  When the mowing operation part 5 is lowered by the three-point link of the tractor 1 to be in the working state, the mowing work part is lowered by lowering the three-point link to a position where the lower end of the guide shoe 80 of the lowering restricting means 8 is in contact with the field scene. By adjusting the height of the guide shoe 80 in advance so that the work posture 5 becomes a normal posture, the work posture does not change every time the guide shoe 80 is moved up and down.

  The present invention is used for an agricultural machine for mowing work that is mounted and used behind a traveling machine such as a tractor.

DESCRIPTION OF SYMBOLS 1 Tractor 10 Top link 11 Lower link 12 Universal joint 2 Mounting part 20 Lower link pin 21 Top link pin 22 Mast frame 23 Connection bracket 230 Vertically rotating shaft 3 Bevel gear case 30 Input shaft 31 Bevel gear 32 Output shaft 4 Belt cover 40 Output pulley 41 Input pulley 42 Transmission belt 5 Mowing section 50 Rotating shaft 51 Mowing blade 52 Mowing section cover 53 Mowing section rotating shaft 54 Mowing section rotating electric cylinder 55 Confirmation gauge 550 Display plate 551 Pointer 56 First link arm 57 First 2 link arm 6 offset mechanism 60 rotating arm 61 forward rotating shaft 62 backward rotating shaft 63 electric cylinder for offset 64 mowing work section holding bracket 7 gauge roller 70 mounting plate 8 lower Regulating means 80 guide shoe 81 holder 9 the electric operation unit 90 changeover switch 91 turning the switch 92 offset relay 93 turning relay 94 Battery

Claims (2)

A mounting portion that is mounted on a tractor that is a traveling machine body, an offset mechanism portion that is configured by a parallel link that is provided with a rotation base portion in the mounting portion and is movable in the left-right direction; A cutting operation unit provided with a plurality of cutting blades in a swingable manner on a rotary shaft in a horizontal direction orthogonal to a traveling direction rotated by power from
The offset mechanism part is movable in the left-right direction by expansion and contraction of an electric cylinder that is rotatably connected between the mounting part side and a turning arm that constitutes a parallel link.
The mowing operation part is rotatable up and down in the direction perpendicular to the tractor traveling direction on the moving end side of the offset mechanism part, and is electrically connected to the offset mechanism part side and the mowing work part side. A mowing machine that is turned by expansion and contraction of a cylinder.   The mowing unit is provided with a confirmation gauge that allows the mowing unit to visually confirm from the tractor driver's seat the amount of rotation that the mowing unit rotates in the vertical direction perpendicular to the tractor traveling direction. 2. The mowing work machine according to claim 1, wherein the electric cylinder to be rotated and retracted can be remotely operated by an electric operation unit provided in a driver's seat.

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