JP2012191864A - Mowing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enlarge the movable range of a mowing operation part for carrying out mowing operation in an offset direction without changing the shape of a hitch member.SOLUTION: The mowing machine is constituted as follows. An attaching part 102 links the mowing machine 101 to a tractor 501. The mowing operation part 103 includes a horizontal rotary shaft 123 having a plurality of mowing blades 124 installed therein, and a side plate 122 positioned at the terminal part of the horizontal rotary shaft 123. An offset mechanism part 104 links the attaching part 102 with the mowing operation part 103, and enables the mowing operation part 103 to be moved in the axial center direction of the horizontal rotary shaft 123. The horizontal rotary shaft 123 rotates around the shaft by the power from the tractor 501, inputted through an input shaft 132 for driving the mowing blades 124. The input shaft 132 for driving the mowing blades 124 is positioned at the outside of the side plate 122 in the mowing operation part 103.

Description

  The present invention relates to a mowing machine mounted on a tractor and used for mowing work.

  DESCRIPTION OF RELATED ART Conventionally, invention of the mowing work machine with which a tractor is mounted | worn and used for mowing work is disclosed (for example, agricultural work machine described in patent document 1).

  In Patent Document 1, “work machine body 1” is “connected to a tractor mounting frame 2 by a pair of parallel links of a first parallel link 21 and a second parallel link 22, and rotates with a left-right rotating electric cylinder 30. Is supported by the moving link 23 so as to be pivotable in the left-right direction, and “is pivotally supported so as to be pivotable in the vertical direction around the pivot shaft 6... There is a description of the point that it is supported by the expansion and contraction of 31 so that it can be turned up and down. According to Patent Document 1, “the working machine body 1 can be changed between a state of working behind the tractor and a state of working with the working machine offset to the right in the traveling direction,” “in the offset state, the working machine body 1 is "It is configured to be able to rotate about 90 degrees upward from the horizontal position and about 55 degrees downward".

JP 2010-268685 A Japanese Patent Laid-Open No. 08-116714

  When the tractor runs, the grass before cutting is stepped on the tractor tire. When the mowing machine is positioned behind the tractor, the grass that has been stepped over by the mowing machine cannot be cut, and uncutting may occur. On the other hand, the larger the offset amount of the mowing machine with respect to the direction of travel of the tractor, the less likely to remain uncut.

  By the way, Patent Document 2 describes that the work implement 4 is connected to the hitch portion 2 of the three-point link mechanism 1 of the tractor. The hitch member 2 has a “frontal portal shape that is pivotally mounted 24 and 25 between the rear ends of the lower link 15 and the top link 17 constituting the three-point link mechanism 1,” and “ It has a top hook 3 and has lower hooks 7 at the lower left and right sides ”and is used to connect the tractor and the work implement 4. There is a fact that the hitch member is standardized so that work machines of various applications can be connected, and it is difficult to change the shape.

  Here, Patent Document 1 has a description that the agricultural machine has a conduction shaft 20. The transmission shaft 20 connects the transmission shaft 10 for inputting power to a transmission means such as a V-belt and the PTO shaft of the tractor. 3 and 4 of Patent Document 1 show the positional relationship between the transmission shaft 20 and the tractor mounting frame 2 (corresponding to the hitch member 2) in plan view. FIG. 5 of Patent Document 1 shows a tractor mounting frame 2 viewed from the rear side. According to the description of FIGS. 3, 4, and 5 of Patent Document 1, the movement of the transmission shaft 20 is limited by the tractor mounting frame 2. That is, in the agricultural machine of Patent Document 1, the movable range of the work machine body 1 is restricted.

  The objective of this invention is expanding the movable range of the offset direction of the mowing operation part which performs mowing work, without changing a shape of a hitch member.

  The mowing machine of the present invention includes (a) a mounting portion for coupling to a tractor, (b) a horizontal rotating shaft provided with a plurality of cutting blades, and a side plate positioned at an end of the horizontal rotating shaft. A mowing unit; (c) an offset mechanism unit that connects the mounting unit and the mowing unit, and allows the mowing unit to move in the axial direction of the horizontal rotation shaft; and (d) the side plate. And a cutting blade driving input shaft to which power for rotating the horizontal rotation shaft from the tractor is rotated.

  According to the present invention, the component (the cutting blade driving unit) that rotates the cutting blade driving input shaft and the horizontal rotation shaft about the axis is located outside the mowing working unit, so that the offset mechanism unit from the point of weight balance. It is possible to increase the length from the holding position of the mowing working part to the end of the mowing working part opposite to the cutting blade driving input shaft. Therefore, the movable range in the offset direction of the mowing operation part that performs mowing work can be expanded without changing the shape of the hitch member. In addition, a mowing operation part is provided in the vicinity of the holding position of the mowing work part so that the mowing work part can be turned up and down, and the mowing work of the inclined surface inclined downward from the tractor running surface on the side of the tractor. If it can be applied to the above, from the point of weight balance, the rotation center position of the vertical rotation can be brought close to the input shaft for cutting blade driving, and the working area width of the mowing work on the inclined surface can be increased.

It is a side view of a mowing machine. It is a top view of a mowing machine. It is a side view which shows the internal structure of a mowing operation part. It is a top view which shows the internal structure of a mowing machine. It is a top view of the mowing work machine in the state where the mowing work part was offset. It is the figure which looked at the mowing operation part from the front side. It is the figure which looked at the mowing working machine in the state where the mowing working part was along the inclined surface which inclines below from the back side. It is a side view of the mowing machine in the state hold | maintained at the stand.

  One embodiment will be described with reference to FIGS. FIG. 1 is a side view of the mowing machine 101. FIG. 2 is a plan view of the mowing work machine 101. The mowing machine 101 is used for mowing work such as farmland. The mowing machine 101 is used by being attached to a three-point link mechanism 502 provided on the rear side of the tractor 501.

  The three-point link mechanism 502 is located between the two rear tires 503 provided in the tractor 501, and moves the lower link 505 up and down according to the operation of the top link 504, a pair of left and right lower links 505, and the operator of the tractor 501. It is comprised with the lift arm (not shown) to rotate, The quick hitch 506 is connected with the mowing work machine 101 side. The quick hitch 506 has an inverted U-shape, and connects the rear end portions of the left and right lower links 505 and the rear end portions of the top links 504 (see also FIG. 7). In FIG. 1, elements constituting the tractor 501 are indicated by a one-dot chain line. Further, in FIG. 2, only some elements included in the tractor 501 are illustrated.

  A top hook 507 is provided at a location near the rear end of the top link 504 in the quick hitch 506. The top hook 507 projects rearward from the central upper part of the quick hitch 506. The top hook 507 can be engaged with the top pin 113 by scooping up the top pin 113 (described later). A lower hook 508 is provided at a location near the rear end of each of the pair of lower links 505 in the quick hitch 506. The lower hook 508 protrudes rearward from each of the left and right lower ends of the quick hitch 506. The lower hook 508 has a movable claw 508A. The movable claw 508A can sandwich a lower pin 114 (described later). The quick hitch 506 is provided with a lever 509 for moving the movable claw 508A. When the lever 509 is moved, the engagement between the lower hook 508 and the lower pin 114 is released.

  The mowing machine 101 includes a mounting part 102, a mowing work part 103, an offset mechanism part 104, an inclination mechanism part 104A, a fixed shaft 105A, and a universal joint 105B.

  The mounting unit 102 is used to connect the mowing machine 101 and the tractor 501. The mounting portion 102 includes a mast frame body 111 and two lower frame bodies 112. The mast frame body 111 protrudes upward on the front side of the mowing machine 101. A top pin 113 is provided at the front end portion of the mast frame body 111. The lower frame bodies 112 are arranged in the width direction of the mowing work machine 101, and all protrude to the lower front side of the mowing work machine 101. A lower pin 114 is provided at the front end portion of any lower frame body 112. The top pin 113 and the lower pin 114 engage with the top hook 507 and the lower hook 508 of the quick hitch 506.

  FIG. 3 is a side view showing the internal structure of the mowing operation unit 103. FIG. 4 is a plan view showing the internal structure of the mowing machine 101. Please refer to FIG. 1 to FIG. The mowing working unit 103 includes a rotor cover 121, two side plates 122, a horizontal rotating shaft 123, a plurality of cutting blades 124, a cutting blade driving unit 131, a cutting blade driving input shaft 132, and a roller unit 103A. With.

  The rotor cover 121 is a member that is long in the width direction of the mowing work machine 101, is located below and behind the mounting portion 102, is located above the horizontal rotation shaft 123, and covers the horizontal rotation shaft 123. A swingable front plate 125 hangs down from each of the front end portion and the rear end portion of the rotor cover 121. The side plates 122 are connected to both ends in the width direction of the rotor cover 121 and extend in parallel to the front-rear direction of the tractor 501. The side plate 122 is provided with a stand attachment portion 122A. A stand 551 (see FIG. 8) is attached to the stand attachment portion 122A. The horizontal rotation shaft 123 is a cylindrical member that extends perpendicularly to the front-rear direction of the tractor 501 and extends horizontally. The horizontal rotation shaft 123 is supported by the side plate 122 at both ends, and is rotatable around the axis. The cutting blades 124 are located between the side plates 122, are attached to the outer peripheral surface of the horizontal rotation shaft 123 via the bracket 126, extend radially from the horizontal rotation shaft 123, and are attached to the bracket 126 so as to be swingable.

  The roller portion 103A is attached to the roller bracket 103B. The roller bracket 103 </ b> B is attached to the side plate 122 below and behind the horizontal rotational shaft 123. The roller portion 103A extends in parallel with the horizontal rotation shaft 123, and is held by the roller bracket 103B so as to be rotatable around the axis of the roller portion 103A itself.

  The cutting blade driving unit 131 is positioned outside the side plate 122 in the mowing working unit 103. The cutting blade driving unit 131 includes a first pulley 133, a second pulley 134, a belt 135, and a cover 136. The first pulley 133 is coaxial with the horizontal rotation shaft 123 and is located outside the side plate 122. The second pulley 134 is located above and behind the horizontal rotation shaft 123 and is coaxial with a bevel gear shaft 137 (described later). The belt 135 is stretched between the first pulley 133 and the second pulley 134. The cover 136 houses the first pulley 133, the second pulley 134, and the belt 135.

  The bevel gear shaft 137 protrudes from the case 139 toward the mowing operation unit 103. A bevel gear group 138 is disposed at the tip of the bevel gear shaft 137 located inside the case 139. The bevel gear group 138 is covered with a case 139. From the case 139, the cutting blade driving input shaft 132 protrudes to the front side of the mowing machine 101. That is, the cutting blade driving input shaft 132 is positioned outside the side plate 122 in the mowing operation unit 103. The power input to the cutting blade driving input shaft 132 is transmitted to the horizontal rotating shaft 123 through the bevel gear group 138, the second pulley 134, the belt 135, and the first pulley 133, and rotates the horizontal rotating shaft 123 about the axis. .

  FIG. 5 is a plan view of the mowing machine 101 in a state where the mowing work unit 103 is offset. Please refer to FIG. 1, FIG. 2 and FIG. The offset mechanism unit 104 connects the mounting unit 102 and the mowing operation unit 103, and allows the mowing operation unit 103 to move in the axial direction of the horizontal rotation shaft 123 (the width direction of the mowing machine 101). The offset mechanism unit 104 includes two swing frames 141, a cylinder 142, a holding bracket 143, and a cylinder guard 144.

  Each of the two swing frames 141 has a front end portion connected to the mounting portion 102 so as to be horizontally rotatable, and extends in parallel from the mounting portion 102 to the rear side. Both ends of the cylinder 142 are connected to the mounting portion 102 and the middle part of the swing frame 141 so that the cylinder 142 can rotate horizontally. The cylinder 142 expands and contracts by receiving power from the tractor 501 via wiring (not shown), and horizontally rotates the swing frame 141. The holding bracket 143 is positioned on the front side surface of the rotor cover 121 of the mowing working unit 103, and is mowing so as to be rotatable about its rotation axis 143A extending from the holding bracket 143 to the rear side of the mowing work machine 101. It is connected to the working unit 103. The holding bracket 143 holds the rear end portions of the two swing frames 141 so as to be horizontally rotatable. The cylinder guard 144 is located above the cylinder 142 and covers the cylinder 142. By providing the two swing frames 141 in parallel, even if the mowing work unit 103 moves in the width direction of the mowing work machine 101, the mowing work unit 103 takes a posture orthogonal to the traveling direction of the tractor 501 in plan view. Can be maintained.

  FIG. 6 is a view of the mowing operation unit 103 as viewed from the front side. The tilt mechanism unit 104A will be described with reference to FIGS. The inclination mechanism unit 104A rotates the mowing working unit 103 up and down around the rotation shaft 143A. The tilt mechanism unit 104 </ b> A includes a rotation arm 151, a cylinder 152, and a cylinder cover 153.

  One end of the rotating arm 151 is rotatably connected to the holding bracket 143, and the other end is rotatably connected to one end of the cylinder 152. The other end portion of the cylinder 152 is rotatably connected to a position away from the holding bracket 143 in the rotor cover 121 of the mowing operation unit 103 in the width direction. The cylinder cover 153 is located above the cylinder 152 and covers the cylinder 152. The cylinder 142 expands and contracts by receiving power from the tractor 501 via a wiring (not shown), and rotates the mowing working unit 103 up and down.

  Please refer to FIG. 1, FIG. 4 and FIG. A PTO shaft 510 is provided on the rear side of the tractor 501. A front end portion of the universal joint 511 is attached to the PTO shaft 510. This universal joint 511 is telescopic. The rear end portion of the universal joint 511 is positioned in the vicinity of the quick hitch 506 in the front-rear direction and in the vicinity of the inverted U-shaped inner side (mounting portion side) formed by the quick hitch 506 when viewed from the front side.

  A fixed shaft 105A and a fixed shaft cover 105C are attached to the mounting portion 102. The fixed shaft 105 </ b> A is located at a substantially central position in the width direction of the mowing machine 101 in the lower frame body 112 and at a substantially central position in the front-rear direction, and protrudes in the front-rear direction. The fixed shaft 105 </ b> A is rotatable around the axis by the bearing 105 </ b> Aa, but is not displaced with respect to the lower frame body 112. The rear end portion of the universal joint 511 is connected to the front end portion of the fixed shaft 105A. The fixed shaft cover 105C is located above the front end portion of the fixed shaft 105A and covers the front end portion.

  Universal joint 105B is telescopic. The front end portion of the universal joint 105B is connected to the rear end portion of the fixed shaft 105A. The rear end portion of the universal joint 105 </ b> B is connected to the cutting blade driving input shaft 132. A joint cover 105D is provided above the connection point between the universal joint 105B and the cutting blade driving input shaft 132.

  When mowing the ground plane GL using the mowing machine 101, the operator of the tractor 501 operates the tractor 501 to move the three-point link mechanism 502 to connect the top hook 507 and the top pin 113, The lower hook 508 and the lower pin 114 are connected. Further, the universal joint 511 is connected to the front end portion of the fixed shaft 105A. Further, wiring (not shown) from the tractor 501 to the cylinders 142 and 152 is connected. When the PTO shaft 510 is rotationally driven by the operation of the tractor 501, this rotational driving force is transferred from the PTO shaft 510 of the tractor 501 to the cutting blade driving input shaft 132 via the universal joint 511, the fixed shaft 105A, and the universal joint 105B. The horizontal rotation shaft 123 is rotated around the axis. In this state, when the tractor 501 travels forward, the grass growing on the ground contact surface GL is cut by the cutting blade 124. The cutting height is kept constant by the roller portion 103A.

  When the cylinder 142 is driven, the mowing operation unit 103 moves in the width direction of the mowing operation unit 103. Further, when the cylinder 152 is driven, the mowing working unit 103 rotates up and down.

  In the mowing work machine 101 having the above-described configuration, the movable range in the offset direction of the mowing work part that performs the mowing work can be expanded without changing the shape of the hitch member, and the efficiency of the mowing work can be improved. That is, in the mowing machine 101, the cutting blade driving input shaft 132 is positioned outside the mowing working unit 103, and the holding bracket 143 is connected to the end of the mowing working unit 103 on the cutting blade driving unit 131 side in terms of weight balance. Can be placed close to the side. For this reason, the length L (refer FIG. 7) from the holding bracket 143 to the edge part on the opposite side to the cutting blade drive part 131 in the mowing operation part 103 can be taken longer than the conventional mowing work machine. In the present embodiment, the cutting blade driving input shaft 132 is positioned outside the mowing working unit 103 rather than the bevel gear group 138, the case 139, and the cutting blade driving unit 131, which is more advantageous in terms of weight balance. The length L can be set longer.

  Further, the power from the PTO shaft 510 of the tractor 501 to the cutting blade driving input shaft 132 is transmitted through a bent path using the fixed shaft 105A and the universal joint 105B instead of the linear power transmission shaft. For this reason, even if the power transmission path is configured to pass inside the quick hitch 506, the movement of the universal joint 105B by the quick hitch 506 is not limited. Also from this point, the length L from the holding bracket 143 to the end of the mowing operation unit 103 opposite to the cutting blade driving unit 131 can be made longer than that of the conventional mowing machine.

  FIG. 7 is a view of the mowing work machine 101 in a state where the mowing work unit 103 is along the inclined surface GC inclined downward, as viewed from the rear side. Please refer to FIG. 6 and FIG. The mowing machine 101 of the present embodiment is advantageous from the viewpoint of weight balance even when mowing work is performed using the mowing machine 101 on the inclined surface GC inclined downward from the edge GB of the flat ground contact surface GL. Thus, the vertical rotation shaft 143A of the mowing operation unit 103 can be brought closer to the cutting blade driving input shaft 132, so that the working area width of the mowing operation on the inclined surface GC can be increased. That is, one of the rear tires 503 is positioned in the vicinity of the edge GB, the mowing work machine 101 is offset, and the mowing work machine 101 is turned up and down around the rotation shaft 143A to bring the mowing work machine 101 into the inclined surface GC. To accompany. When the tractor 501 travels in the direction along the edge GB in such a state, the grass grown on the inclined surface GC is cut by the cutting blade 124 (see FIGS. 3 and 4). In the mowing work machine 101 of the present embodiment, the length L (the distance from the holding bracket 143 to the end of the mowing work unit 103 opposite to the cutting blade drive unit 131) can be increased. The working area width M to the inclined surface GC by the working unit 103 is increased.

  FIG. 8 is a side view of the mowing machine 101 held by the stand 551. In the present embodiment, the stand 551 can be used to hold the mowing work machine 101 in a state where the connection with the tractor 501 is lifted from the ground contact surface GL. The stand 551 is used while being placed on the grounding surface GL. The base 552 along the grounding surface GL, a caster 553 attached to the base 552, and a stand arm 554 that is inclined upward from the base 552 and extends upward. And have. The cross-sectional shape of the stand attachment portion 122A provided in the mowing operation unit 103 is the same as the cross-sectional shape of the stand arm 554.

  When the mowing work machine 101 is held on the stand 551, the three-point link mechanism 502 is moved in a state where the mowing work machine 101 is mounted on the tractor 501 by the operation of the tractor 501, and the rear side of the mowing work machine 101 is lifted. Subsequently, the stand arm 554 is attached to the stand attachment portion 122A, and a pin (not shown) is inserted through both of them. Subsequently, the three-point link mechanism 502 is moved by the operation of the tractor 501 to place the stand 551 on the ground contact surface GL. Subsequently, the three-point link mechanism 502 is further moved to release the connection between the quick hitch 506 and the mounting portion 102. Specifically, the connection between the top hook 507 and the top pin 113 and the connection between the lower hook 508 and the lower pin 114 are released. Further, the connection between the universal joint 511 and the fixed shaft 105A (see FIG. 4) is also released.

  In the present embodiment, the mowing machine 101 can be held in a state of floating from the ground contact surface GL to prevent the mowing work portion 103 from being damaged or corroded by being in contact with the ground contact surface GL during non-working, Moreover, the weight of the mowing operation part 103 applied to the offset mechanism part 104 and the universal joint 105B when not working can be reduced. Further, the posture of the mowing machine 101 when it is mounted (engaged) with the quick hitch 506 can be maintained.

DESCRIPTION OF SYMBOLS 101 Mowing machine 102 Mounting part 103 Mowing work part 104 Offset mechanism part 105A Fixed shaft 105B Universal joint 122 Side plate 122A Stand attachment part 123 Horizontal rotating shaft 124 Cutting blade 131 Cutting blade drive part 132 Cutting blade drive input shaft 501 Tractor 551 Stand GL ground plane

Claims (4)

A mounting for connecting to the tractor;
A mowing working unit including a horizontal rotating shaft provided with a plurality of cutting blades and a side plate located at an end of the horizontal rotating shaft;
An offset mechanism unit that connects the mounting unit and the mowing working unit, and enables the mowing working unit to move in the axial direction of the horizontal rotation shaft;
A cutting blade driving input shaft that is positioned outside the mowing working unit with respect to the side plate and to which power for rotating the horizontal rotation shaft from the tractor is rotated.
Mower working machine equipped with. For transmission of power from the tractor to the cutting blade driving input shaft, a fixed shaft provided in the mounting portion to which power from the tractor is input, the fixed shaft, and the cutting blade driving input shaft are provided. Universal joints to be used are used,
The mowing machine according to claim 1. A cutting blade driving unit that rotates the horizontal rotation shaft about the axis by power input to the cutting blade driving input shaft is positioned outside the mowing working unit with respect to the side plate,
The cutting blade driving input shaft is located outside the mowing working unit with respect to the cutting blade driving unit.
The mowing machine according to claim 1 or 2. The mounting portion is connected to a quick hitch provided on the tractor side,
The mowing work part includes a stand attachment part for attaching a stand for floating and holding the mowing work part in a state where the connection with the tractor is released,
The mowing working machine according to any one of claims 1 to 3.

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