JP6674752B2 - Mowing machine - Google Patents

Description

  The present invention relates to an improvement of an agricultural machine mounted on a tractor for mowing.

  Japanese Patent Application Laid-Open No. 2013-53 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2012-44884 (Patent Document 2) are disclosed as conventional techniques of this type of mowing device.

  Patent Literature 1 discloses that "a regulating means for preventing the mowing work unit from turning vertically in a direction perpendicular to the tractor advancing direction is provided when the mowing work unit is located behind the tractor, The regulating means operates when the mowing section is substantially horizontal in the offset state behind the tractor. " Patent Literature 2 states that “the two arms that constitute the parallel link are provided with projecting portions that project toward the other arm at different positions, and at one position of the offset movement, An offset working machine, wherein the projecting portions come into contact with each other to serve as a stopper, and at the other position of the offset movement, the projecting portion of at least one arm comes into contact with the other arm to serve as a stopper. ing.

Japanese Patent Application Laid-Open No. 2013-53 JP 2012-44884 A

  In the case of a mowing machine that can work offset from the tractor to the side, mowing of the side part where the tractor is not running is possible, and the mowing work part can be turned up and down in the direction perpendicular to the running direction By doing so, it is possible to mow a portion inclined vertically in the lateral direction with respect to the tractor traveling section. When the mowing section is located behind the tractor, the mowing section does not need to rotate, and the work is performed in a horizontal state parallel to the tractor axle. In addition, when moving in the non-working state, the state in which the mowing work section is positioned horizontally behind the tractor has the best balance of gravity. However, since the mowing part is held by the cylinder so as to be rotatable up and down in a direction perpendicular to the traveling direction, the mowing part rotates downward during traveling due to an internal leak of the cylinder, and in the worst case, Accidents such as inadvertent dragging of the ground may occur. In addition, when a stand is provided on the mowing work unit side when attaching and detaching to and from the tractor, when the mowing work unit side and the mounting unit side are not parallel, the mounting side is not horizontal, so there is a problem that the mounting and dismounting becomes difficult. . Similarly, when a cylinder is used to offset the mowing part to the side, an accident such as a collision when the mowing part is offset to the side during traveling due to an internal leak of the cylinder or the like. There is a risk of getting up.

  Therefore, an object of the present invention is to provide a mowing machine configured at low cost so that the mowing unit is not rotated or moved by an easy operation when the mowing unit is in the storage position behind the tractor. .

In order to solve the above-mentioned problem, the invention of claim 1 advances the mowing work section from the rear part of the tractor by means of a rotating arm connected to the rear part of the tractor and provided in parallel with each other so as to be horizontally rotatable to form a pair of parallel links. A mowing work unit is provided at a rear end side of the rotating arm, and a mowing work unit holding bracket for holding the mowing work unit is provided on the rotating arm. A mowing work machine that is connected to the rear end side of the mower and is capable of rotating the mowing work unit up and down on a plane orthogonal to the tractor advancing direction around a mowing work unit rotating shaft provided in parallel and horizontally with the traveling direction. , when the non-working position the mowing unit is located behind the tractor, prevents horizontal movement of the laterally from the rotation and non-working position in the vertical direction of the plane perpendicular to the tractor traveling direction of the mowing unit Be provided is because the stopper means, the stopper means is actuated by the mowing unit on and substantially horizontal condition in a non-offset state located in the tractor rear, the stopper means is horizontally moving the mowing unit The holes provided in the mutually protruding portions projecting from the opposite sides of the left and right rotating arms are overlapped, and a fixing pin is inserted into the holes to move the mowing working portion from the non-working position to the side. And that the engagement piece provided on one of the left and right rotating arms engages with the engagement portion on the mowing work portion side, thereby preventing the mowing work portion from turning up and down. A mowing machine.

  According to the present invention, since the stopper means for preventing the mowing work unit from rotating in the vertical direction and moving horizontally from side to side is provided, the mowing work unit is inadvertently moved due to a cylinder leak or the like. Therefore, it is possible to provide a mowing machine capable of performing safe work. In addition, since the mounting portion is always horizontal by the stopper means when attaching and detaching to and from the tractor, attachment and detachment can be performed well.

It is a side view of the working state of the mowing machine of this invention. It is a top view in the state where the mowing work part of the mowing machine of the present invention was located at the back of the tractor. It is a top view in the state where the mowing work part of the mowing machine of the present invention was offset to the side of the tractor. FIG. 4 is a partially sectional plan view showing a state in which a mowing work unit is positioned behind a tractor and a stopper unit is operated. It is a principal part rear view of the stopper means for preventing horizontal movement to the side. It is a front view of a mowing work part. It is a principal part top view of the stopper means in the state where rotation of the mowing work part in the up-down direction is not prevented. It is a principal part top view in the state where the stopper means for preventing rotation of the mowing work part in the up-down direction is operating. It is a principal part rear view in the state where the mowing work part was inclined downward. It is a top view for explaining a power transmission part. It is a side view showing the state where a mowing machine is attached to a tractor. It is a top view of the mowing machine which showed another embodiment of the stopper means of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The mowing machine shown in this example is mounted on a three-point link hitch mechanism provided behind the tractor 1 and is used by driving the mowing unit 5 with power from the tractor 1. Also, the mowing work section 5 is provided so as to be movable left and right with respect to the tractor 1, and it is also possible to perform work while being positioned on the side of the tractor 1. First, a forward harvesting operation is possible.

  The mowing machine of the present example has a mounting section 2 for mounting to the tractor 1 at a front portion, and a mowing section 5 is provided behind the mounting section 2. The mounting section 2 and the mowing section 5 are offset mechanism sections 6. Are connected via The offset mechanism 6 is formed of a parallel link in plan view. The front end of the parallel link is rotatably connected to the mounting part 2 side and the rear end side is rotatably connected to the mowing work part 5 side, so that even when the mowing work part 5 moves left and right, the posture orthogonal to the traveling direction changes. Not configured.

  The mounting unit 2 is provided with an automatic hitch device. The 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 mounted. A three-point link hitch mechanism comprising a pair of left and right lower links 11 provided behind the tractor 1 and a top link 10 provided above the center thereof is provided with a hitch frame 20 (referred to as a quick hitch or an automatic hitch) for standardizing these. Is attached, and the top hook 207 above the hitch frame 20 is engaged with the top pin 210 at the upper central portion provided in front of the mowing machine, and the three-point link hitch mechanism is raised. The lower pins 205 provided on the lower front left and right sides are pulled toward the hitch frame 20 side, engage with the U-shaped groove of the lower plate 206 of the hitch frame 20, and are prevented from coming off by the hook 208 provided on the U-groove portion. And the mowing machine are connected.

  The mowing work unit 5 is provided with a bevel gear case 3 which is a power input unit provided on one side upper portion of the mowing work unit 5, and projects forward from the bevel gear case 3 as shown in FIG. 10. The provided second input shaft 30 and the first input shaft 212 provided on the mounting portion 2 are connected by an axially extendable universal joint 65, and the front side of the first input shaft 212 is connected to the tractor PTO shaft 13. The power is taken out from the tractor 1 by the universal joint 12 and the mowing work unit 5 is driven. Since the second input shaft 30 and the first input shaft 212 provided on the mounting unit 2 are connected by a universal joint 65 that can be extended and contracted in the axial direction, the parallel connection provided between the mounting unit 2 and the mowing work unit 5 is achieved. The amount of displacement between the cores at the time of rotation of the offset mechanism 6 constituted by the link is absorbed.

  The bevel gear case 3 is provided so as to protrude outward from the cutting blade 51 at the outermost end of the mowing work section 5, and the bevel gear case 3 transfers power input to the second input shaft 30 by the internal bevel gear 31. The gear is converted and shifted in a direction orthogonal to the second input shaft 30. The converted power is transmitted from one side of the bevel gear case 3 to the lateral end side of the mowing work section 5 by the horizontal output shaft 32. An output pulley 33 is fixed to the end of the output shaft 32 on the side end side, and an input pulley 57 fixed to the end of the rotary shaft 50 of the mowing work unit 5 is provided below the output pulley 33. The power input to the second input shaft 30 by the transmission belt stretched over these pulleys is transmitted to the rotary shaft 50 of the mowing work unit 5 and is driven to rotate. The pulley and the transmission belt are covered and guarded by a belt cover 4.

  The mowing work section 5 has a mowing rotor 56 having a plurality of mowing blades 51 rotatably provided on a rotating shaft 50 in a horizontal direction orthogonal to the tractor advancing direction. Rotate so as to scoop up from the front to the back so that the grass passes, and cut and crush the weeds and the like. The upper part of the outer circumference of the cutting locus 51 is covered with a cutting portion cover 52 to prevent the cut weeds and the like from scattering and to allow a part of the cut weeds and the like to move around the rotating shaft 50. It is provided so as to be crushed more finely. Both ends of the rotating shaft 50 are held by side plates 55 which are covers on the left and right sides of the reaper cover 52 via bearings 550.

  The front end of the mowing portion cover 52 projects forward from the mowing rotor 56, and is bent in a vertical direction downward from a horizontal plane continuously projecting from the front of the mowing portion cover 52 and the front end thereof. An L-shaped portion is formed. A large number of flaps 520 are provided at the lower end of the inverted L-shape so as to be hung down in the width direction of the mowing work section 5 so that foreign matter or the like bounced off by the mowing rotor 56 does not jump out. .

  A gauge roller 7 is provided at a lower rear portion of the mowing work section 5, and contacts with the ground surface to maintain the ground height behind the mowing work section 5 during work. The gauge roller 7 is provided in the shape of a cylinder having a length substantially equal to the width of the cutting rotor 56, and the right and left ends of the mounting roller 70 extending rearward from the left and right side plates 55 of the mowing work unit 5 rotate through bearings 72. It is freely held. A plurality of mounting holes for the mounting plate 70 to the side plate 55 are provided, and the height of the mowing work section 5 is adjusted by selecting and mounting the mounting hole position.

  An offset mechanism 6 for moving the mowing work unit 5 left and right includes a rotating arm 60 having a front end side connected to the mounting unit 2 so as to be horizontally rotatable and extending rearward, and one end turning the other end to the mounting unit side. An electric cylinder 63 for offset, which is connected to the moving arm 60 side so as to be freely rotatable horizontally and rotates the rotating arm 60 in the horizontal direction by the expansion and contraction operation, and a mowing work unit 5 at the rotating end side of the rotating arm 60 The rotating arm 60 is provided in a pair of left and right parallel to each other, the front end is on the mounting part 2 side, and the rear end is on the mowing work part holding bracket 64 on the mowing work part 5 side. The mowing work unit 5 is connected to the tractor 1 shown in FIG. 3 from the rear position of the tractor 1 shown in FIG. 3 by being connected by a front rotating shaft 61 and a rear rotating shaft 62 provided in the vertical direction. 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 constituted by an offset mechanism using parallel links, the structure is simple and the manufacturing cost can be reduced.

  The mowing work unit holding bracket 64 is horizontally rotatably held on a turning end side of the turning arm 60 by a vertical rear turning shaft 62 to form a parallel link mechanism, and is parallel to the traveling direction. The mowing work unit 5 is held by a horizontally provided mowing work unit rotating shaft 53 so as to be vertically rotatable on a plane perpendicular to the traveling direction. The mowing work unit rotating electric cylinder 54 is connected to the mowing working unit 5 side and the mowing working unit holding bracket 64 side such that both ends are rotatable, and the mowing working unit rotating electric cylinder 54 is extended and contracted. A rotating mechanism for rotating the mowing operation unit 5 up and down around the mowing operation unit rotating shaft 53 is configured. By rotating the mowing work part 5 up and down, it is possible to mow weeds and the like on an inclined surface that is inclined up and down laterally with respect to the running surface of the tractor 1.

  The offset mechanism section 6 is connected to the mounting section 2 at the front end side via a connection bracket 203 at a lower portion on one of the left and right sides of the mast frame 202 of the mounting section 2. The moving arm 60 is held by a vertically provided front rotating shaft 61, and one end on the front side of a connecting bracket 203 is connected to the mast frame 202 by a vertically rotating shaft in a horizontal direction orthogonal to the traveling direction so as to be able to rotate back and forth. doing. The front-rear rotation angle is restricted to 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 work field at the time of work. Have been.

  3 to 8, a stopper means for preventing the mowing work unit 5 of this embodiment from rotating and laterally moving will be described. FIGS. 4 and 8 show a state in which the mowing work unit 5 is located at the rear of the tractor, and a state in which the vertically rotating stopper plate 80 is fitted into the U-shaped notch 580 of the holding bracket side rotating link arm 58. 3 and FIG. 7 show a state in which the vertical rotation stopper plate 80 is separated from the holding bracket side rotation link arm 58 in a state where the mowing work unit 5 is offset.

  The vertical rotation of the mowing operation unit 5 is performed about a mowing operation unit rotating shaft 53 which is a horizontal axis provided in the mowing operation unit holding bracket 64 and parallel to the traveling direction. The rotation is made up and down by the expansion and contraction of the electric motor 54 for rotating the mowing work section which is bridged between the mowing work section 5 and the mowing work section holding bracket 64.

  The electric motor 54 for rotating the mowing work section is rotatably mounted on a mounting bracket having one end fixed to the upper surface of the mowing section cover 52 of the mowing work section 5 by a rotation axis parallel to the traveling direction. The pivoting link arm 58 is connected to two pivoting link arms, and one end of the pivoting link arm is rotatably attached to the mowing work unit holding bracket 64 by a pivot axis parallel to the traveling direction. And a working unit side rotating link arm 59 that is rotatably mounted on a mounting bracket having one end fixed to the upper surface of the mowing unit cover 52 of the mowing unit 5 by a rotating shaft parallel to the traveling direction. The other end is rotatably connected by the same shaft. As shown in FIG. 6, when viewed from the front of the mowing working unit 5, the holding bracket-side rotating link arm 58 and the working unit-side rotating link arm 59 have a connection portion between the mowing working unit rotating electric cylinder 54 as a vertex. It is arranged in a triangular shape, and has a link configuration in which the mowing work unit rotating shaft 53 is arranged near the bottom side. When the electric motor 54 for rotating the mowing work unit is extended, the mowing work unit 5 rotates downward. When it contracts, it pivots upward.

  In this example, the front side of the mowing work unit rotating electric cylinder 54 is covered by a cylinder cover 540, and the holding bracket side rotating link arm 58, the working unit side rotating link arm 59, and the mowing working unit rotating A coupling portion with the electric cylinder 54 is exposed to the front from a long hole provided in the cylinder cover 540 in the direction of expansion and contraction of the electric cylinder 54 for rotating the mowing work unit. The length of 54, that is, the corresponding rotation angle of the mowing work unit 5 can be confirmed by a scale 541 provided above the long hole.

  A stopper means for preventing the mowing work unit 5 from rotating in the vertical direction is provided at the lower edge of the holding bracket-side rotating link arm 58 on the mowing work unit rotating shaft 53 side. When in the position, a U-shaped notch 580 that opens toward the turning end side of the mowing work unit 5 is provided, and the notch 580 has a vertical turning stopper provided on the turning arm 60. The plate 80 is fitted so as to prevent the mowing work unit 5 from turning up and down.

  The vertical rotation stopper plate 80 is provided so as to protrude from a side of one of the rotation arms 60 on the side approaching the mowing work unit 5 when the mowing work unit 5 is at the rear position of the tractor. A flat band-shaped material is extended in a U-shaped notch 580 from the upper surface of the rotating arm 60 so as to extend toward the U-shaped notch 580, and the end portion is a horizontal plane parallel to the upper surface of the rotating arm 60. When the mowing part 5 is horizontal, the end is fitted into the U-shaped notch 580 of the holding bracket side rotating link arm 58. A plate-like reinforcing member is fixedly provided in a T-shaped cross section below the flat band member.

  When the mowing work unit 5 is horizontal and is in the non-working position at the rear position of the tractor 1, the vertically rotating stopper plate 80 is fitted into the U-shaped notch 580 to rotate the holding bracket side rotating link arm 58. Fix it. When the mowing unit 5 moves in the offset direction from the rear position of the tractor 1, the vertically rotating stopper plate 80 is disengaged from the U-shaped cutout 580 of the holding bracket side rotating link arm 58, and the mowing operation is performed. The vertical rotation of the portion 5 is enabled. The fitting between the vertically rotating stopper plate 80 provided on the rotating arm 60 and the mowing work unit 5 side is not limited to the U-shaped notch 580 of the holding bracket side rotating link arm 58. Instead, it is only necessary to be provided on the mowing work section 5 side and fitted and prevented from rotating. Further, the rotation preventing direction may be only the descending direction.

  4 and 5, a description will be given of a stopper means for preventing the mowing work unit 5 from moving horizontally to the side. FIG. 4 shows a state in which the mowing work unit 5 is located behind the tractor, and the vertically rotating stopper plate 80 is fitted into the U-shaped notch 580 of the holding bracket-side rotating link arm 58 so that the mowing work unit 5 can be moved. This is a state in which vertical rotation is prevented. As shown in FIG. 5, a horizontal left engagement plate 811 and a right engagement plate 812 projecting toward the mutual rotation arms are provided on the surfaces of the rotation arms 60 and 60 facing each other. The holes are fixed so that the holes in the vertical direction overlap each other in a state where the vertical rotation of the mowing work unit 5 is prevented. By inserting the fixing pin 810 into this hole, the horizontal rotation of the rotary arms 60 is stopped.

  That is, when the mowing work unit 5 is horizontal and is in the non-working position at the rear position of the tractor 1, the fixing pin 810 is inserted into the holes of the left engaging plate 811 and the right engaging plate 812, thereby rotating the mowing work unit 5. And the horizontal movement to the side is prevented. In this state, it is possible to prevent the mowing work unit from rotating downward and moving sideways during careless running due to an internal leak of the mowing work unit rotating electric cylinder 54 or the offset electric cylinder 63 or the like.

  FIG. 9 is a rear view of a main part of the mowing machine of this example in a state where the mowing machine 5 is offset and inclined, and the universal joint 65 is omitted. By offsetting the mowing work unit 5 as shown in FIG. 9, mowing work can be performed on the side part of the tractor that is inclined in a horizontal state. Although this figure shows a case where it is inclined downward, the same operation can be performed when it is inclined upward. In the state where the mowing work part 5 is offset, the engagement of the vertical rotation stopper plate 80 is released, and the fixing pin 810 for engagement between the left engagement plate 811 and the right engagement plate 812 of the rotation arm 60 is released. State.

  FIG. 12 shows a stopper means 8 'of another embodiment. When the mowing section 5 is horizontal and in the non-working position at the rear position of the tractor 1, the stopper means 8 'is provided with a plate-shaped rotating arm engaging plate 813 projecting horizontally from one of the rotating arms 60 and the mowing. A vertical through-hole is provided in the overlapped portion of the plate-shaped mowing work unit engaging plate 814 protruding horizontally forward from the work unit 5, and the fixing pin 810 'is inserted and fixed. The rotating arm engaging plate 813 is provided vertically bifurcated, and the mowing work section engaging plate 814 is positioned so as to enter between the bifurcated shapes. With this configuration, the mowing work unit 5 is prevented from rotating downward and moving laterally. When the fixing pin 810 'is pulled out and the mowing work unit 5 is laterally moved to a position where the overlapping of the rotating arm engaging plate 813 and the mowing working unit engaging plate 814 is released, the mowing work is vertically rotated. And horizontal movement.

  Next, the operation of the mowing machine according to the present invention will be described. The first input shaft 212 of the mounting unit 2 and the tractor PTO shaft 13 are connected by the universal joint 12 and mounted on the tractor 1 by the mounting unit 2 provided at the front part of the mowing machine. . At this time, in the case of connection by the automatic hitch device, as shown in FIG. 11, these are fixed to a three-point link hitch mechanism comprising a pair of left and right lower links 11 of the tractor 1 and a top link 10 provided above the center thereof. When the hitch frame 20 to be changed is attached, the top hook 207 above the hitch frame 20 is engaged with the top pin 210 at the upper center provided in front of the mowing machine, and the three-point link hitch mechanism is raised, the mowing machine becomes The lower pins 205 provided on the lower front left and right sides of the side are drawn toward the hitch frame 20 side, engage with the U-shaped groove of the lower plate 206 of the hitch frame 20, and are prevented from being removed by the hook 208 provided in the U groove portion, The tractor 1 and the mowing machine are connected. In the case of this example, the universal joint 12 is also connected at the same time when connected. If the mowing work unit rotating electric cylinder 54 expands or contracts due to an internal leak or the like during this mounting, the mast frame 202 is tilted left and right and cannot be mounted because the mowing work unit 5 is held by the stand 9. Although there is a danger, since the rotation is prevented by the stopper means 8 of the present invention, it can be easily mounted. When the mowing machine is mounted and the fixing pin 810 of the rotating arm 60 is removed after moving to the work field, the work can be performed.

  The input power is transmitted from the universal joint 12 to the second input shaft 30 of the bevel gear case 3 via the first input shaft 212 of the mounting section 2 and the universal joint 65. The power of the second input shaft 30 is transmitted by the bevel gear 31 inside the bevel gear case 3 to the lateral end side of the mowing work unit 5 by the output shaft 32. An output pulley 33 is fixed to the tip of the output shaft 32, and an input pulley 57 fixed to the end of the rotating shaft 50 of the mowing work section 5 is provided below the output pulley 33, and the output pulley 33 is stretched over these pulleys. The power is transmitted to the rotating shaft 50 of the mowing work unit 5 by the transmission belt and is driven to rotate. A plurality of cutting blades 51 are provided on the rotating shaft 50 so as to be swingable in a radial manner, and the cut weeds and the like are rotated so that the cut weeds pass above the rotating shaft 50 and scoop up from the front to the rear, Weeds are cut and crushed as the tractor advances. The upper part of the outer periphery of the rotation path of the cutting blade 51 is covered with a cutting part cover 52 to prevent scattering of the cut weed and the like, and to rotate a part of the cut weed and the like by the action of the scooping surface of the cutting blade 51. Bring it around the axis 50 to break it further finely.

  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 with respect to the mounting unit 2 so as to expand and contract. By offsetting the mowing work portion 5 from the side of the tire of the tractor 1 to the outside and running the tractor 1 on the field surface after mowing, the work is performed while the mowing work portion 5 is positioned at the uncut portion. Can prevent the occurrence of uncut leaves due to stepping down on weeds and the like in the unworked area.

  By offsetting the mowing work section 5 outward from the side of the tractor 1 and further expanding and contracting the mowing section rotating electric cylinder 54 to rotate the mowing working section 5 up and down in a direction orthogonal to the traveling direction, The mowing work on the side slope that is vertically inclined with respect to the running surface of the tractor 1 can be performed. The movement and rotation operation of the mowing work unit 5 is operated by a control box provided near the driver's seat.

  When the mowing work is completed, the mowing work unit 5 is moved horizontally to the rear of the tractor 1, and at this time, a vertical rotation stopper plate serving as a stopper means for preventing the mowing work unit 5 from turning in the vertical direction. By inserting the fixing pin 810 into the U-shaped notch 580 of the holding bracket-side rotating link arm 58 and inserting the fixing pin 810 into the engaging plate of the rotating arm 60, the mowing work unit 5 is moved to the tractor 1. It can be in a horizontal state parallel to the axle. In the case of traveling, the mowing work unit 5 is held by the vertically rotating stopper plate 80 and the fixing pin 810, so that mowing is performed during traveling due to an internal leak of the mowing unit rotating electric cylinder 54 or the offset electric cylinder 63, or the like. It is safe without the working unit 5 rotating downward and inadvertently sliding to the side. Further, when the stand 9 is provided on the side of the mowing work section 5 when the tractor is attached to and detached from the tractor by the quick hitch, the mounting section 2 is always horizontal due to the operation of the stopper means 8, and the attaching and detaching by the quick hitch is good. Can be done.

  INDUSTRIAL APPLICABILITY The present invention is applicable to an agricultural machine mounted on the rear of a tractor that is a traveling machine for mowing work.

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 No. 1 input shaft 3 bevel gear case 30 second input shaft 31 bevel gear 32 output shaft 4 belt cover 5 mowing work 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 rotating link arm 580 Notch 59 Working part Side rotation link arm 6 Offset mechanism 60 Rotation arm 61 Front rotation axis 62 Rear rotation axis 63 Electric cylinder for offset 64 Mowing work part holding bracket 65 Universal joint 7 Gauge roller 70 Mounting plate 8 Stopper means 80 Vertical rotation Stopper plate 81 Horizontal movement stopper 810 Fixing pin 811 Left engaging plate 812 Right engaging plate

Claims (1)

The mowing work unit can be horizontally moved from the rear of the tractor to the side orthogonal to the traveling direction by a rotating arm that is connected to the rear of the tractor and that is provided in parallel to the left and right so as to be horizontally rotatable and that constitutes a parallel link. The mowing work unit is provided on the rear end side of the rotating arm, and a mowing working unit holding bracket that holds the mowing working unit is connected to the rear end side of the rotating arm, and is parallel to the traveling direction. In a mowing machine in which the mowing working unit can be turned up and down on a plane orthogonal to the tractor advancing direction around a horizontally provided mowing working unit rotating shaft,
When the mowing part is in the non-working position located behind the tractor, the mowing part is prevented from rotating vertically in a plane orthogonal to the tractor advancing direction and from moving horizontally from the non-working position. Stopper means is provided, and the stopper means is operated by bringing the mowing work section into a non-offset state and a substantially horizontal state located behind the tractor ,
The stopper means overlaps the respective holes provided in the mutually projecting portions projecting from the opposite sides of the left and right rotating arms for horizontally moving the mowing work unit, and inserts a fixing pin into the holes. The mowing work section is prevented from moving from the non-working position to the side, and the engaging pieces provided on the left or right rotating arm are engaged with the engaging sections on the mowing work section side, so that the mowing work section can be moved up and down. A mowing machine, wherein the mowing machine is configured to prevent rotation of the mower.

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