JP2016154515A - Grass mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance stability in storage movement by lowering the center of gravity of a grass mower and to ensure rear side visibility in the storage movement.SOLUTION: A grass mower 11 includes: a support frame 41 mounted on an agricultural tractor 21; a first boom 51 supported on one end in a vehicle width direction of the support frame 41 so as to be turned vertically; a first link mechanism A including a lift cylinder 43 turning the first boom 51 vertically; a second boom 61 connected with the first boom 51 so as to be turned, and mounted with a grass mowing work part 31 at a tip; and a second link mechanism B including a grass mowing work part turning cylinder 63 turning the grass mowing work part 31 vertically with respect to the second boom 61. In a storage state where the grass mowing work part 31 is positioned in a rear part of the agricultural tractor 21, the grass mower is folded so that the first boom 51 is positioned above the support frame 41 to be nearly horizontal, the second boom 61 becomes nearly horizontal with respect to the first boom 51, and a grass mowing blade rotation shaft of the grass mowing work part 31 is positioned to be nearly horizontal with respect to the second boom 61.SELECTED DRAWING: Figure 1

Description

The present invention relates to a mower. Specifically, the present invention relates to an arm-linked mower. More specifically, the present invention relates to an arm-connected mower connected to an agricultural tractor or the like via an arm mechanism.
Arm-connected mowers are convenient because they can perform mowing work regardless of horizon changes.

  The “arm-coupled mower” described in Patent Document 1 includes “a first arm 2 pivotally supported by a support member 20 attached to an agricultural tractor T as a work vehicle, and the first arm 2 in a vertical direction. 1 is an arm-coupled mower 1 having a first cylinder 3 as a lift cylinder that is pivoted to a first arm 2 and a second arm 4 that is pivotally connected to a first arm 2 and has a mower main body 6 attached to the tip. This arm-coupled mower 1 rotates the first arm 2 and the first cylinder 3 along the vehicle width direction of the tractor T as the first cylinder 3 expands and contracts, thereby storing the mowing work state and storing. It is possible to switch between states ”.

  The retracted state of the “arm-connected mower” described in Patent Document 1 is illustrated in FIG. According to the figure, in the retracted state, the first arm 2 is folded diagonally over the full width of the arm-connected mower 1 and over the full height of the vehicle, and the second arm 4 extends from the upper end of the first arm 2. It extends in the horizontal direction. Furthermore, the mower main body 6 is placed on the first arm 2 substantially in parallel, that is, obliquely.

JP 2010-200699 A

  The “arm-coupled mower” described in Patent Document 1 has problems that the first arm and the second arm are folded obliquely, so that the rear view is deteriorated and the center of gravity is located at the top.

  It is an object of the present invention to lower the center of gravity of a mower to increase stability during storage movement and to secure a rear view during storage movement.

The mower of the present invention is
A support frame attached to an agricultural tractor;
A first boom supported at one end of the support frame in the vehicle width direction so as to be pivotable up and down;
A first link mechanism including a lift cylinder for rotating the first boom in the vertical direction;
A second boom pivotally connected to the first boom and having a mowing working part attached to the tip;
In the mower having the second link mechanism including the mowing working part rotating cylinder for rotating the mowing working part in the vertical direction with respect to the second boom,
When the mowing working part is in the retracted state located behind the agricultural tractor,
The first boom is positioned above the support frame and is substantially horizontal;
The second boom is substantially horizontal to the first boom;
The mowing blade rotating shaft of the mowing working unit is folded so as to be positioned substantially parallel to the second boom.

Alternatively, the mower of the present invention further includes
The first link mechanism includes:
A first link arm having one end pivotally connected to the support frame;
A second link arm connected to the first boom so that one end thereof can freely rotate is connected to each end so as to freely rotate,
It is composed of a lift cylinder that is spanned between the connecting portion and the support frame and is rotatably connected.
The second link mechanism is
A working unit side first link arm having one end rotatably connected to the second boom side;
A working unit side second link arm, which is pivotally connected at one end to the mowing working unit side, is pivotally connected, and spans between the working unit side second link arm and the second boom side and is pivotable. It is comprised by the mowing operation part rotation cylinder connected with this.

Alternatively, the mower of the present invention further includes
A protective cover for preventing scattering from the rotating mowing blade is provided above the mowing working portion, and the rotary shaft of the mowing working portion in the retracted state is in a state of being released upward. To do.

  According to the present invention, the center of gravity of the mower is lowered to increase the stability during the storage movement, and the rear view is ensured.

It is a rear view of the mowing operation state of the mower which concerns on the Example which concerns on embodiment of this invention. It is a rear view of the mower folding intermediate state which concerns on the Example which concerns on embodiment of this invention. It is a rear view of the state folded in parallel of the mower which concerns on the Example which concerns on embodiment of this invention. It is a top view of the state folded in parallel of the mower which concerns on the Example which concerns on embodiment of this invention. It is the perspective view seen from the front side of the mowing working part of the mower which concerns on the Example which concerns on embodiment of this invention. It is the perspective view seen from the back side of the mowing work state of the mower which concerns on the Example which concerns on embodiment of this invention.

A first example according to an embodiment of the present invention will be described with reference to the drawings.
11 is a mower according to an embodiment of the present invention. Reference numeral 21 denotes an agricultural tractor that drives the mower 11.
In FIG. 4, 22 is a tractor top link, and 23A and 23B are tractor lower links. A tractor top link 22, a tractor lower link 23A, and a tractor lower link 23B are provided at the rear of the agricultural tractor 21, and connect and pull the mower 11.
Reference numeral 12 denotes a hydraulic oil tank. The hydraulic oil tank 12 is fixed to a different end of the mower 11. Since each cylinder used in the mower 11 is a hydraulic cylinder, the hydraulic cylinder 12 stores driving oil. Reference numeral 13 denotes a hydraulic pressure switching valve. The hydraulic pressure switching valve 13 is installed adjacent to the hydraulic oil tank 12 and provided inside. The oil pressure switching valve 13 selectively supplies oil to each hydraulic cylinder to be driven. 14 is a hydraulic pump. The hydraulic pump 14 is installed adjacent to the hydraulic switching valve 13.

  Reference numeral 41 denotes a support frame or a main frame. One end of the support frame 41 is mounted adjacent to the hydraulic oil tank 12 in the vehicle width direction of the mower 11 connected to the rear portion of the agricultural tractor 21. 42 is a mast. The mast 42 is fixed to one end of the support frame 41 in the vehicle width direction, in this embodiment, as shown in FIG. 43 is a lift cylinder. The lift cylinder 43 is attached to the support frame 41 at the end opposite to the attachment end of the mast 42 so that the base portion can be freely rotated by the lift cylinder shaft 431. Reference numeral 432 denotes a lift cylinder tip shaft, which is provided at the tip of the lift cylinder 43.

Reference numeral 44 denotes a first link arm. The first link arm 44 has a generally inverted character shape as a whole, and is connected to a mast 42 provided on the support frame 41 so that one end of the first link arm 44 can pivot about the first link arm pivot shaft 442 as a pivot center. . The other end of the first link arm 44 is attached to the lift cylinder 43 so as to be rotatable about the same axis as the rotation axis of the lift cylinder tip shaft 432.
45 is a second link arm. The second link arm 45 is connected to the first boom 51 at one end so as to be rotatable about the second link arm rotation shaft 451 as a rotation center. The other end of the second link arm 45 is attached to the lift cylinder 43 so as to be rotatable about the same axis as the pivot axis of the lift cylinder tip shaft 432 serving as a connecting portion.
The first link arm 44 and the second link arm 45 are rotatably connected by a lift cylinder tip shaft 432.

  51 is a first boom. The first boom is connected to the mast 42 so as to be rotatable up and down, and rotatable about the first boom rotation shaft 441. The first boom 51 is simultaneously supported on the mast 42 that is one end in the vehicle width direction of the support frame 41 via the first link arm 44, the second link arm 45, and the lift cylinder 43.

  A is a first link mechanism. The first link mechanism A includes a first link arm 44 having one end rotatably connected to the support frame 41 and a second link arm 45 having one end rotatably connected to the first boom 51. The end portion is pivotally connected by a lift cylinder tip shaft 432 which is a connecting portion, and is spanned between the lift cylinder tip shaft 432 and the support frame 41 so as to be pivotally connected, and the first boom 51 is moved in the vertical direction. The lift cylinder 43 is configured to rotate.

Reference numeral 52 denotes a second boom rotation cylinder. 53 is a second boom rotation shaft.
The base of the second boom turning cylinder 52 is attached to the second boom arm rotating shaft 451 of the first boom 51. A second boom pivot shaft 53 is provided at the end of the first boom 51, and the tip end of the second boom pivot cylinder 52 is closer to the first boom 51 than the second boom 61 to the second boom pivot shaft 53. Is connected to a tip end shaft 520 of a second boom rotation cylinder provided at a position extending from the top. In response to the expansion and contraction of the second boom rotation cylinder 52, the second boom 61 rotates up and down around the second boom rotation shaft 53 as a rotation center.

  The second boom 61 is rotatably connected to the first boom 51. The second boom 61 is attached with the mowing working unit 31 at the tip.

63 is a mowing working unit rotating cylinder. The mowing work part rotation cylinder 63 rotates the mowing work part 31 in the vertical direction with respect to the second boom 61.
B is a second link mechanism. The second link mechanism B includes a working unit side first link arm 64 having one end pivotably connected to the second boom 61 side, and a working unit side coupled one end to the mowing working unit 31 side. The second link arm 65 is rotatably connected, and is composed of a mowing work part rotating cylinder 63 that is spanned and connected to the working part side second link arm 65 and the second boom 61 side. ing.

The working unit side first link arm 64 has a ring shape that is approximately semicircular, and the working unit side second link arm 65 also has a ring shape that is approximately semicircular as a whole. The side second link arm 65 is connected by a mounting shaft 642. The working unit side first link arm 64 is connected to the second boom 61 by an attachment shaft 641. The working part side second link arm 65 and the mowing work part 31 are connected to the mowing work part 31 by an attachment shaft 643. The mowing operation part rotation shaft 66 connects the mowing work part 31 so as to be rotatable about the same axis as the rotation center.
The working part side second link arm 65 and the mowing work part rotating cylinder 63 are located closer to the mowing work part 31 than the connecting shaft 642 between the working part side first link arm 64 and the working part side second link arm 65. The mounting shaft 644 at a position away from the mounting shaft 643 is rotatably connected.
The working unit side first link arm 64 and the working unit side second link arm 65 are formed in a substantially circular ring shape. Therefore, the amount of movement becomes large, and the amount of folding as a whole can be increased.

In the folded mowing unit 31 shown in FIG. 5, reference numeral 32 denotes a mowing unit rotating shaft. A large number of mowing blades 34 are provided on the mowing working unit rotating shaft 32 so as to protrude therefrom.
33 is a gauge roller, and 35 is a hydraulic motor. The gauge roller 33 has a horizontal axis of rotation and is for grounding on the surface of the cutting ground and stabilizing the height of the cutting working portion.
The hydraulic motor 35 is rotated by the hydraulic pressure generated by the hydraulic pump 14, rotates the mowing operation unit rotating shaft 32, and drives the mowing blade 34.

  In FIG. 5, 15 is an input shaft, 16 is a top link mounting hole, and 17A and 17B are lower link mounting holes. The input shaft 15 is connected to a PTO shaft provided in the agricultural tractor 21 and extracts driving force. The top link mounting hole 16 is attached to the tractor top link 22 provided in the agricultural tractor 21, and the lower link mounting holes 17A and 17B are attached to the tractor lower links 23A and 23B provided in the agricultural tractor 21, respectively.

When the mowing work unit 31 is in the retracted state positioned behind the agricultural tractor 21, the first boom 51 is positioned above the support frame 41 and is substantially horizontal, and at the same time, the second boom 61 is in relation to the first boom 51. The mowing operation unit rotating shaft 32 of the mowing operation unit 31 is folded so as to be positioned substantially parallel to the second boom 61.
A protective cover for preventing scattering from the rotating grass cutting blade is provided above the grass cutting operation portion, and the grass cutting operation portion rotating shaft 32 of the grass cutting operation portion 31 in the retracted state is released upward.

In this embodiment, the folding angle is increased at the two links of the first link mechanism A and the second link mechanism B.
In this embodiment, the first boom 51 and the second boom 61 are folded in parallel. Therefore, when the mower 11 located behind the agricultural tractor 21 is housed, the visibility behind the agricultural tractor 21 is good and safe movement. Can run.
In the mower 11 retracted state, the first boom 51 and the second boom 61 are folded in parallel, so that the center of gravity is lowered, and the risk of falling or the like when traveling on the agricultural tractor 21 is reduced.
When the mower 11 mounted from the agricultural tractor 21 is released and stored, stable storage can be performed because the center of gravity is lowered.

  Since the mowing blade rotating shaft 32 of the mowing working portion 31 in the retracted state is released upward, the mowing blade portion 34 can be easily inspected when the mower 11 is attached to the agricultural tractor 21 and when the mowing cutter 11 is released.

DESCRIPTION OF SYMBOLS 11 Mower 21 Agricultural tractor 31 Mowing working part 32 Mowing blade rotating shaft 41 Support frame 43 Lift cylinder 51 First boom 61 Second boom 63 Mowing working part rotation cylinder first link mechanism A
Second link mechanism B

Claims (3)

A support frame attached to an agricultural tractor;
A first boom supported at one end of the support frame in the vehicle width direction so as to be pivotable up and down;
A first link mechanism including a lift cylinder for rotating the first boom in the vertical direction;
A second boom pivotally connected to the first boom and having a mowing working part attached to the tip;
In the mower having the second link mechanism including the mowing working part rotating cylinder for rotating the mowing working part in the vertical direction with respect to the second boom,
When the mowing working part is in the retracted state located behind the agricultural tractor,
The first boom is positioned above the support frame and is substantially horizontal;
The second boom is substantially horizontal to the first boom;
A mowing machine, wherein the mowing blade rotating shaft of the mowing working unit is folded so as to be positioned substantially parallel to the second boom. The first link mechanism
A first link arm having one end pivotally connected to the support frame;
A second link arm connected to the first boom so that one end thereof can freely rotate is connected to each end so as to freely rotate,
It is composed of a lift cylinder that is spanned between the connecting portion and the support frame and is rotatably connected.
The second link mechanism
A working unit side first link arm having one end rotatably connected to the second boom side;
The working part side second link arm connected to the mowing working part side so that one end thereof is rotatable is rotatably connected,
It is composed of a mowing working part turning cylinder that is spanned between the working part side second link arm and the second boom side and is rotatably connected.
The mower according to claim 1.   A protective cover for preventing scattering from the rotating mowing blade is provided above the mowing working portion, and the rotary shaft of the mowing working portion in the retracted state is in a state of being released upward. The mower according to claim 1 or 2.

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