JP5812327B2 - Mowing machine - Google Patents

Description

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

  Japanese Unexamined Patent Application Publication No. 2010-268685 (Prior Art 1) is disclosed as a prior art of this type of reaping device.

  The prior art 1 is “a farm work machine that cuts grass and the like by traveling with a tractor while being connected to a tractor that is a traveling vehicle”, and “grass while rotating in a predetermined direction based on power from the input shaft 10 side”. A cutting shaft 15 for performing a cutting operation such as "the working machine body 1 is connected to the tractor mounting frame 2 by a pair of parallel links of a first parallel link 21 and a second parallel link 22; “Moving machine body 1 can rotate up and down about rotation axis 6”, such as grass, is “movable left and right by electric cylinder 30 for right and left rotation and rotation link 23”. The agricultural machine to take is disclosed.

JP 2010-268685 (Prior Art 1)

  In the case of a mowing work machine that can work by offsetting from the tractor to the side, it is possible to cut the side part where the tractor is not traveling, and the mowing work part can be rotated up and down in the direction perpendicular to the traveling direction By doing so, it is possible to cut a portion inclined in the vertical direction on the side with respect to the tractor traveling portion. When the mowing operation unit is located behind the tractor, the mowing operation unit does not need to rotate, and the operation is performed in a horizontal state parallel to the tractor axle. Further, when moving in the work state, the state in which the mowing working unit is positioned in a horizontal state behind the tractor is in a state where the balance of the center of gravity is the best. However, since the mowing operation part is held by the cylinder so as to be able to rotate up and down in the direction perpendicular to the traveling direction, the mowing operation part rotates downward during traveling due to internal leakage of the cylinder, etc. It may lead to accidents such as accidentally dragging the ground. In addition, when attaching / detaching the tractor using the quick hitch, if the stand is provided on the mowing working part side, the attaching side will not be horizontal when the mowing work part side and the attaching part side are not parallel, making it difficult to attach / detach using the quick hitch. There is a problem.

  For this reason, there has been a method of preventing the rotation by inserting a lock pin or the like so that the mowing working unit does not rotate during movement. However, the work of descending from the tractor after the work is troublesome and often forgotten.

  Therefore, an object of the present invention is to provide a mowing machine configured such that when the mowing working unit is in the storage position behind the tractor, the mowing working unit does not rotate by an easy operation.

In order to solve the above-mentioned problem, the mowing working part can be horizontally moved from the rear part of the tractor to the side perpendicular to the traveling direction by means of a rotating arm connected to the rear part of the tractor and provided in a pair of left and right in a horizontally rotatable manner. The mowing working part is provided on the rotating end side of the rotating arm, and is connected to a position displaced to the left or right side of the mowing working part, and is provided parallel to the traveling direction and horizontally. in mowing unit rotatable mowing machine mowing unit about the pivot axis in the vertical direction perpendicular to the tractor traveling direction, when the mowing unit is positioned at the rear of the tractor, tractor mowing unit It has regulation means are provided for preventing the rotation of the direction of the vertical direction perpendicular to the traveling direction, restricting means, and to the substantially horizontal state mowing unit in the offset state of the tractor rear Suggest mowing machine is characterized in that operate by.

Further, the restricting means is a restricting means for preventing the mowing working part from rotating up and down by fitting a stopper provided on the left and right rotating arm for horizontally moving the mowing working part to the mowing working part side. We propose the mowing machine described in the previous section characterized by

Further, the restricting means is a restriction in which a stopper provided on the left and right pivot arms prevents the pivot link arm connected to the mowing working section pivoting cylinder from pivoting and prevents the mowing working section from pivoting up and down. A mowing working machine described in columns 0008 or 0009 is proposed.

  According to the present invention, the restricting means for preventing the mowing working part from rotating in the vertical direction is provided, and the operator works by operating the mowing working part from the tractor driver's seat. There is no need to get off and operate, the troublesome operation is eliminated, and the work efficiency is improved. Further, when attaching / detaching to / from the tractor by the quick hitch, the attaching portion is always horizontal by the regulating means, so that attachment / detachment can be performed satisfactorily.

The side view of the working state of the mowing machine of this invention. The top view in the state where the mowing operation part of the mowing machine of the present invention was located behind the tractor. The top view of the state which offset the mowing work part of the mowing machine of this invention to the tractor side. The top view of the control means part of the state which located the mowing work part in the back of a tractor. The top view of the control means part of the state which offset the mowing work part to the tractor side. The front view of a mowing work part. The principal part rear view of the state which inclined the mowing work part downward. The top view which showed the power transmission part.

  Embodiments of the present invention will be described below with reference to the following drawings. 1 is a side view of the working state of the mower working machine according to the present invention, FIG. 2 is a plan view of the mowing working machine according to the present invention with the mowing working part positioned behind the tractor, and FIG. 3 is the mowing working machine of the present invention. FIG. 4 is a plan view of the regulating means portion with the mowing work portion positioned behind the tractor, and FIG. 5 is a plan view of the mowing work portion on the side of the tractor. FIG. 6 is a front view of the mowing operation unit, FIG. 7 is a rear view of the main part in a state where the mowing operation unit is inclined downward, and FIG. 8 shows the power transmission unit. A plan view 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 to the side of the tractor 1. First, forward cutting work is possible.

  The mowing machine of this example is provided with a mounting portion 2 for mounting on the tractor 1 at the front portion, and a mowing working portion 5 is provided behind the mounting portion 2, and the mounting portion 2 and the mowing working portion 5 are offset mechanism portion 6. It is connected through. The offset mechanism unit 6 is configured by a parallel link in plan view, and the parallel link front end is rotatably connected to the mounting unit 2 side, and the rear end side 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.

  The mounting portion 2 is provided with an auto hitch device, and a hitch frame 20 is attached to a three-point link mechanism, which is an elevating device provided behind the tractor 1, and the hitch frame 20 is raised by the three-point link mechanism. When the mowing machine is lifted, the mowing machine is automatically connected and attached. A hitch frame 20 (referred to as a quick coupler or an auto hitch) that stylizes 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. When the top hook 210 above the hitch frame 20 is engaged with the top pin 210 at the center upper portion provided in front of the mowing machine and the three-point link hitch mechanism is raised, the front of the mowing machine Lower pins 205 provided on the lower left and right sides are pulled toward the hitch frame 20 and engaged with the U-shaped groove of the lower plate 206 of the hitch frame 20, and the hook 208 provided in the U-groove is used to prevent the tractor 1. Mowing machine is connected.

  The mowing working unit 5 is provided with a bevel gear case 3 which is a power input unit provided on one side upper side of the mowing working unit 5 and projects forward from the bevel gear case 3 as shown in FIG. The provided second input shaft 30 and the first input shaft 212 provided in the mounting portion 2 are connected by a universal joint 65 that can extend and contract in the axial direction, and the front side of the first input shaft 212 is connected to the tractor PTO shaft 13. Connected by the universal joint 12, the power is taken out from the tractor 1, and the mowing working unit 5 is driven. Since the second input shaft 30 and the first input shaft 212 provided in the mounting portion 2 are connected by a universal joint 65 that can be expanded and contracted in the axial direction, the parallel provided between the mounting portion 2 and the mowing working portion 5 is provided. It absorbs the amount of displacement between the cores when the offset mechanism section 6 constituted by a link is rotated.

  The bevel gear case 3 is provided so as to protrude outward from the cutting blade 51 at the outermost end of the mowing working unit 5, and the bevel gear case 3 receives power input to the second input shaft 30 by the internal bevel gear 31. Conversion and shifting are performed in a direction perpendicular to the second input shaft 30. The converted power is transmitted from one side of the bevel gear case 3 to the side end of the mowing unit 5 through the horizontal output shaft 32. An output pulley 33 is fixed to the tip of the output shaft 32 on the side end portion side, and an input pulley 57 fixed to the end of the rotary shaft 50 of the mowing working unit 5 is provided below the output pulley 33. The power input to the second input shaft 30 by the power transmission belt stretched around these pulleys is transmitted to the rotary shaft 50 of the mowing working 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 working unit 5 has a mowing rotor 56 in which a plurality of mowing blades 51 are swingably provided on a horizontal rotating shaft 50 orthogonal to the tractor traveling direction, and this is cut above the rotating shaft 50. Rotate the grass so that it passes from the front to the back so that the grass will pass through. The upper part of the outer periphery of the cutting blade 51 rotation trajectory is covered with a cutting unit cover 52 to prevent scattering of the cut weeds and the like, and to move some of the cut weeds around the rotating shaft 50. It is provided to be further crushed finely. Both end portions of the rotary shaft 50 are held by side plates 55 which are covers on the left and right sides of the cut portion cover 52 via bearings 550.

The front end portion of the cutting portion cover 52 protrudes forward from the cutting rotor 56 and is bent in the vertical direction downward from the horizontal plane continuously protruding from the front of the cutting portion cover 52 and the front end thereof. An L-shaped part is formed. A large number of flaps 520 are hung down in the width direction of the mowing working unit 5 at the lower end of the inverted L shape so that foreign matter or the like bounced off by the mowing rotor 56 does not jump out. .

  A gauge roller 7 is provided in the lower rear portion of the mowing operation unit 5 and is grounded to the ground surface during the operation to maintain the ground height on the rear side of the mowing operation unit 5. The gauge roller 7 is provided in a cylindrical shape having a length substantially equal to the cutting rotor 56, and the left and right end portions of the mowing working unit 5 are rotated via bearings 72 on a mounting plate 70 extending rearward from the left and right side plates 55. It is held freely. A plurality of attachment holes for the attachment plate 70 to the side plate 55 are provided, and the height of the mowing working unit 5 is adjusted by selecting and attaching the attachment hole positions.

  The offset mechanism unit 6 that moves the mowing working 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 connected to the moving arm 60 side in a horizontally rotatable manner and rotates the rotating arm 60 in the horizontal direction by its expansion and contraction operation, and the mowing 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, with the front end on the mounting portion 2 side and the rear end on the grass cutting work portion holding bracket 64 on the grass 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 mowing working unit 5 is arranged from the rear position of the tractor 1 shown in FIG. 2 to the tractor 1 shown in FIG. To both sides Even right movement is performed orthogonal orientation of the working unit cutting the traveling direction is configured so as not to be changed. Since it is composed of an offset mechanism using a parallel link, the structure is simple and the manufacturing cost can be kept low.

  The mowing working unit holding bracket 64 is held on a rotating end side of the rotating arm 60 by a vertical rotating shaft 62 in a parallel link mechanism so as to be horizontally rotatable and parallel to the traveling direction. The mowing operation unit rotating shaft 53 provided horizontally holds the mowing operation unit 5 so as to be rotatable in the vertical direction on a surface orthogonal to the traveling direction. An electric cylinder 54 for rotating the mowing work part is connected to the mowing work part 5 side and the mowing work part holding bracket 64 side so that both ends can be freely rotated. In addition, a rotation mechanism unit that rotates the mowing operation unit 5 up and down around the rotation shaft 53 of the mowing operation unit is configured. By rotating the mowing operation unit 5 up and down, weeds and the like on an inclined surface that is inclined vertically to the side of the traveling surface of the tractor 1 can be cut.

  The offset mechanism portion 6 is connected to the mounting portion 2 on the front end side through a connection bracket 203 to a lower portion of one side of the mast frame 202 of the mounting portion 2 via a connection bracket 203, and is connected to the rear side of the connection bracket 203. The moving arm 60 is held by a vertical rotation shaft 61 provided in the vertical direction, and one end on the front side of the connection bracket 203 is connected to the mast frame 202 by a horizontal vertical rotation shaft orthogonal to the traveling direction. doing. The front / rear rotation angle is regulated within a certain range, so that the mowing working unit 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 during work. Has been.

In FIG. 4, FIG. 5, and FIG. 6, the restricting means for preventing rotation of the mowing working unit 5 of this example will be described. FIGS. 4 and 5 show a state in which the grass cutting work unit 5 is located behind the tractor and the stopper 600 is fitted to the U-shaped notch 580 of the holding bracket side rotation link arm 58. FIG. 6 shows a state in which the grass cutting operation unit 5 is offset and the stopper 600 is separated from the holding bracket side turning link arm 58.

  The vertical movement of the mowing operation unit 5 is rotated about the mowing operation unit rotation shaft 53 that is a horizontal axis parallel to the traveling direction provided in the mowing operation unit holding bracket 64. The rotation is turned up and down by the extension and contraction of the electric cylinder 54 for turning the mowing work part spanned between the mowing work part 5 and the mowing work part holding bracket 64.

  The electric cylinder 54 for rotating the mowing operation part is attached to an attachment bracket having one end fixed on the upper surface of the mowing part cover 52 of the mowing work part 5 so as to be freely rotatable by a rotation axis parallel to the traveling direction. The rotation link arm is connected to the two rotation link arms, and one end of the rotation link arm is rotatably attached to the mowing working unit holding bracket 64 by a rotation axis parallel to the traveling direction. And a working part side rotation link arm 59 attached to a mounting bracket whose one end is fixed to the upper surface of the cutting part cover 52 of the mowing work part 5 by a rotating shaft parallel to the traveling direction. The other end is rotatably connected by the same axis. As shown in FIG. 6, the holding bracket side turning link arm 58 and the working unit side turning link arm 59 are connected to the cutting cylinder turning electric cylinder 54 in the front view of the mowing working unit 5. It is arranged in a triangular shape, and has a link configuration in which the mowing operation part rotating shaft 53 is arranged in the vicinity of the bottom, and when the mowing operation part rotating electric cylinder 54 is extended, the mowing work part 5 rotates downward. When it shrinks, it turns upward.

  In this example, the front side of the electric cylinder 54 for turning the mowing operation part is covered with a cylinder cover 540, and the holding bracket side turning link arm 58, the working part side turning link arm 59, and the mowing work part turning. The connecting portion with the electric cylinder 54 is exposed to the front side from the long hole provided in the cylinder cover 540 in the extending and contracting direction of the electric cylinder 54 for rotating the mowing operation portion, and the electric cylinder for rotating the mowing operation portion from the tractor driver seat. The length of 54, that is, the rotation angle of the mowing operation portion 5 corresponding to this length can be confirmed by a scale 541 provided in the upper portion of the long hole.

  The restricting means for preventing the mowing working unit 5 from rotating in the vertical direction is such that the mowing working unit 5 is horizontally disposed on the lower edge of the holding bracket side turning link arm 58 on the mowing working unit turning shaft 53 side. At the position, a U-shaped notch 580 that opens toward the rotating end of the mowing unit 5 is provided, and the stopper 600 provided on the rotating arm 60 is fitted into the notch 580. Combined, the mowing working unit 5 is provided to prevent the rotation.

  The stopper 600 is provided so as to protrude from the side of one rotating arm 60 on the side approaching the mowing working unit 5 when the mowing working unit 5 is located at the rear of the tractor. Is extended from the upper surface of the rotating arm 60 toward the U-shaped notch 580, and the end is a horizontal plane parallel to the upper surface of the rotating arm 60. When the mowing work part 5 is horizontal, the work part 5 is fitted into the U-shaped cutout part 580 of the holding bracket side turning link arm 58. A plate-like reinforcing member is fixed in a T-shaped cross section below the flat strip member.

  When the mowing working unit 5 is horizontal and is at the offset position behind the tractor 1, the stopper 600 is fitted into the U-shaped notch 580 to fix the rotation of the holding bracket side rotation link arm 58. When the mowing working unit 5 moves in the offset direction from the rear position of the tractor 1, the stopper 600 is disengaged from the U-shaped notch 580 of the holding bracket side turning link arm 58, and the mowing working unit 5 is moved up and down. Direction rotation is possible. The fitting between the stopper 600 provided on the rotating arm 60 and the mowing operation part 5 side is not limited to the U-shaped notch 580 of the holding bracket side rotating link arm 58, but mowing work. What is necessary is just to be provided in the part 5 side and to be fitted and to prevent rotation. Further, the rotational direction may be only the downward direction.

  FIG. 7 is a rear view of the main part of the mowing working machine of the present example in a state where the mowing working part 5 is offset and inclined, and the universal joint 65 portion is omitted. By offsetting the mowing operation unit 5 as shown in FIG. 7, the mowing operation of the side portion where the tractor is inclined in a horizontal state can be performed. Although this figure shows the case where it inclines below, even if it inclines upward, it can work similarly.

  Next, the operation of the mowing machine according to the present invention will be described. The tractor 1 is attached to the tractor 1 by the attachment portion 2 provided at the front portion of the mowing machine, the first input shaft 212 of the attachment portion 2 and the tractor PTO shaft 13 are connected by the universal joint 12, and are rotationally driven by the power from the tractor 1. . At this time, in the case of connection by the auto hitch device, when the three-point link mechanism of the tractor is lifted and the top pin 210 is hooked on the top hook 207 to lift the mowing work machine, the mowing work machine is automatically connected to the universal joint. 12 are also connected at the same time. The input power is transmitted from the universal joint 12 to the second input shaft 30 of the bevel gear case 3 through the first input shaft 212 and the universal joint 65 of the mounting portion 2. The power of the second input shaft 30 is transmitted to the side end side of the mowing working unit 5 by the output shaft 32 by the bevel gear 31 inside the bevel gear case 3. An output pulley 33 is fixed to the distal end of the output shaft 32, and an input pulley 57 fixed to the end of the rotary shaft 50 of the mowing operation unit 5 is provided below the output pulley 33, and is stretched around these pulleys. The power is transmitted to the rotary shaft 50 of the mowing working unit 5 by the transmission belt 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 mowing work unit 5 performs the work by adjusting the offset position from the tractor 1 by moving the offset electric cylinder 63 of the offset mechanism unit 6 to the left and right by extending and contracting the mounting unit 2. By offsetting the mowing work part 5 from the tire side of the tractor 1 and running the field part surface after cutting the tractor 1, the mowing work part 5 is positioned at an uncut part and the work 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 offsetting the mowing unit 5 from the tire side of the tractor 1 to the outside, and further extending and retracting the mowing unit rotating electric cylinder 54 to rotate the mowing unit 5 up and down in the direction perpendicular to the traveling direction, The mowing work of the slope of the side part inclined up and down with respect to the traveling surface of the tractor 1 becomes possible. The movement and rotation operation of the mowing operation unit 5 is operated by a control box provided near the driver's seat.

  If the mowing operation part 5 is leveled and moved rearward of the tractor 1 and the three-point link mechanism of the tractor 1 is lowered, the mowing work behind the tractor 1 can be performed. In this case, if the traveling surface of the tractor 1 and the mowing operation unit 5 are not in a parallel state, the mowing surface is inclined, so that the mowing operation unit 5 needs to be in a horizontal state parallel to the axle of the tractor 1. At this time, a stopper 600 that is a restricting means for preventing the mowing working unit 5 from rotating in the vertical direction is fitted into the U-shaped notch 580 of the holding bracket side rotating link arm 58. The mowing working unit 5 can be in a horizontal state parallel to the axle of the tractor 1. In the case of traveling, the mowing operation unit 5 is held by the stopper 600, and the mowing operation unit 5 does not rotate downward during the operation due to an internal leak of the mowing unit rotating electric cylinder 54, which is safe. Furthermore, when the stand is provided on the mowing working unit 5 side when the quick hitch is attached to or detached from the tractor, the mounting unit 2 side becomes horizontal due to the operation of the restricting means, and the quick hitch can be attached and detached satisfactorily.

  INDUSTRIAL APPLICABILITY The present invention can be used for an agricultural machine for performing a mowing operation that is mounted and used behind a tractor that is a traveling machine.

DESCRIPTION OF SYMBOLS 1 Tractor 10 Top link 11 Lower link 12 Universal joint 13 Tractor PTO shaft 2 Mounting part 20 Hitch frame 200 Lower link pin 201 Top link pin 202 Mast frame 203 Connection bracket 205 Lower pin 206 Lower plate 207 Top hook 208 Hook 210 Top pin 212 First DESCRIPTION OF SYMBOLS 1 Input shaft 3 Bevel gear case 30 2nd input shaft 31 Bevel gear 32 Output shaft 4 Belt cover 5 Mowing working part 50 Rotating shaft 51 Mowing blade 52 Mowing part cover 53 Mowing working part rotating shaft 54 Mowing working part rotating electric cylinder 540 Cylinder Cover 541 Scale 55 Side plate 550 Bearing 56 Cutting rotor 57 Input pulley 58 Holding bracket side turning link arm 580 Notch 59 Working part Side turning link arm 6 Offset mechanism 60 Turning arm 600 Stopper 61 Forward turning shaft 62 Back turning shaft 63 Electric cylinder for offset 64 Mowing working part holding bracket 65 Universal joint 7 Gauge roller 70 Mounting plate

Claims (3)

The mowing working part can be horizontally moved from the rear part of the tractor to the side perpendicular to the traveling direction by a turning arm connected to the rear part of the tractor and provided in a pair of left and right so as to be horizontally rotatable . The rotary arm is provided on the rotary end side of the rotary arm and connected to a position displaced to the left or right side of the mowing operation part, and is centered on the rotary axis of the mowing work part provided parallel to the traveling direction and horizontally. In the mowing machine capable of rotating the mowing working part up and down in the direction perpendicular to the tractor traveling direction,
When the mowing working part is located behind the tractor, a restricting means is provided for preventing rotation in the vertical direction in a direction perpendicular to the tractor traveling direction of the mowing working part,
Regulating means, mowing machine, characterized by operating by mowing unit is in and substantially horizontal state in the offset state positioned to the tractor rear. The restricting means is a restricting means for preventing the mowing working part from rotating up and down by fitting a stopper provided on the left and right rotating arm for horizontally moving the mowing working part to the mowing working part side. The mowing machine according to claim 1. The restricting means is a restricting means in which a stopper provided on a rotating arm on one of the left and right sides prevents rotation of a rotating link arm connected to a mowing working unit rotating cylinder to prevent vertical movement of the mowing working unit. 3. A mowing machine according to claim 1 or claim 2, wherein