JP2002262634A - Sulky mobile mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mower mounted on a sulky mobile machine such as a tractor and enabling a mowing operation to be carried out efficiently and safely. SOLUTION: This sulky mobile mower has the following construction and scheme: the front end portion of a sulky mobile machine 1 is provided with a risable arm, the tip of which is mounted with a mowing head 2 in a swingable way, the mowing head 2 functions to cut grass/trees or the like with a cutting blade projected on the outer periphery of an upper blade plate 16 and a 2nd cutting blade projected on the outer periphery of a lower blade plate 17 by rotating at low speed the upper and lower blade plates 16 and 17 disposed along the identical axis oppositely to each other, the risable arm is composed of a plurality of arms or made turnable, thereby enabling a wide range of mowing operation to be carried out, and the mowing head 2 is driven by making use of the rotary driving force of the mobile machine 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing method in which a movable machine such as a tractor or a cultivator is provided with an undulating arm, and a mowing head is attached to the tip of the arm to perform efficient mowing. It is an invention relating to a machine.

[0002]

2. Description of the Related Art Conventionally, a mowing apparatus using a movable machine that can be used has been known, and a mowing apparatus unit attached to the tip of an arm (boom) of the mobile apparatus itself is also known. Further, as disclosed in Japanese Utility Model Application Laid-Open No. 2-83714, a hydraulic mower equipped with a rotary cutter blade at the tip of an arm has also been proposed.

[0003]

The mobile mowing apparatus that can be used in the past, which is put into practical use, has a mowing apparatus unit attached to the tip of the arm of the mobile machine itself.
Many mobile machines are large and the mowing equipment unit is also large, making it difficult for anyone to use it easily. In addition, there are problems such as uncut portions and uneven cutting heights in narrow places, sloping places, and places with unevenness. Furthermore, in the mowing apparatus disclosed in Japanese Utility Model Laid-Open No. 2-83714, a cutter blade that rotates at a high speed is attached to the tip of an arm that mechanically operates, so that the cutter blade comes into contact with an obstacle. Had the disadvantage of being very dangerous. In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a safe riding mobile mowing machine that can be used relatively easily without leaving uncut portions and cutting heights being uneven. Is what you do.

[0004]

An undulating arm is provided at the front end of a movable mobile machine. At the tip of this arm, a plurality of cutting blades 19 and a lower blade projecting to the outer peripheral portion of the upper blade plate by rotating the upper blade plate 16 and the lower blade plate 17 arranged on the same axis in the opposite direction at a low speed. A mowing head 2 for cutting vegetation with a plurality of cutting blades 20 protruding from the outer periphery of the board is mounted.
The mowing head 2 attached to the tip of the arm can swing freely with respect to the arm.

The undulating arm may be composed of a single arm, but if it is composed of a plurality of arms that are rotatably connected, a wide range of mowing work can be performed. Also,
The rotational driving force of the mobile machine 1 is connected to the mowing head 2 attached to the tip of the arm via the flexible shaft 12,
When the upper blade plate 16 and the lower blade plate 17 are rotationally driven, no special driving device is required. Further, when the telescopic arm is used as the arm that can be raised and lowered, a wider range of mowing can be performed. At this time, if a power transmission mechanism using the spline shaft 29 is adopted as power transmission means in the telescopic arm portion,
The arm can be extended and contracted without hindering the rotational driving of the upper blade plate 16 and the lower blade plate 17 mounted on the mowing head.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a riding mobile mower according to the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a side view of the entire mowing machine mounted on a front end of a movable machine 1 such as a tractor or the like, FIG. 2 is a plan view of the mowing head 2, and FIG. 3 is a longitudinal sectional view of the mowing head 2.

As shown in FIG. 1, a mounting table 3 is protruded from a front end of a mobile machine 1, and a base end of a first arm 5 can be raised and lowered by a shaft 6 on a rotating table 4 mounted on the mounting table 3. At the same time, the base end of the second arm 7 is rotatably connected to the distal end of the first arm 5 by a shaft 8, and the mowing head 2 is mounted on the distal end of the second arm 7 so as to swing freely. A first arm 5 mounted to be able to move up and down by a shaft 6 is provided with a cylinder 9 disposed over an intermediate portion between the turntable 4 and the first arm 5.
And a cylinder 10 arranged between the middle part of the first arm 5 and the middle part of the second arm 7.
The bending angle can be freely set by using this. Thereby, the mowing head 2 attached to the tip of the second arm 7 can be moved in the front-back direction of the work surface. Further, by rotating the turntable 4, the mowing head 2 can be moved in the left-right direction of the work surface. Therefore, the mowing head 2 can be mounted on a wide range of work surface by a combination of the bending operation of the arm and the rotating operation of the turntable 4.
Can be moved to perform mowing work.

The mowing head 2 mounted on the distal end of the second arm 7 may be driven by a drive unit provided by its own, but a power source mounted on a mobile machine can be used. That is, an output shaft 11 that is rotated by a tractor engine or the like is provided, and the output shaft 11 and the mowing head 2 are provided.
Are connected by a flexible shaft 12 arranged along the first arm 5 and the second arm 7 to supply power to the mowing head 2 mounted on the tip of the arm that can be raised and lowered. Note that the up-and-down movable arm may be configured by one long arm, and the mowing operation may be performed only by moving the moving machine.

The mowing head 2 mounted on the distal end of the second arm 7 rotates the upper blade plate 16 and the lower blade plate 17 arranged on the same axis at low speed in the opposite directions, thereby forming the outer peripheral portion of the upper blade plate 16. A plurality of cutting blades 19 projecting from the lower blade plate 17 and a plurality of cutting blades 20 projecting from the outer peripheral portion of the lower blade plate 17 are used to cut plants and the like, so that the entire mowing head 2 can swing freely. An example of a specific structure of the mowing head 2 is shown in FIGS. 2 and 3.

The mowing head 2 shown in FIGS. 2 and 3 comprises a sun gear 13 (annular external gear), a large-diameter ring gear 14 (annular internal gear), a sun gear 13 and a ring. The sun gear 13 and the ring gear 14 are driven to rotate in opposite directions by rotating one of the small gears. The upper blade plate 16 is attached to the ring gear 14 which is driven to rotate in the opposite direction, and the sun gear 13
Each of the lower blade plates 17 is mounted via a connecting plate 18 protruding from the lower surface. Therefore, by rotating one of the small gears 15 with the flexible shaft 12, the upper blade plate 16 and the lower blade plate 17 are rotated in opposite directions at a low speed, and a plurality of protrusions projecting to the outer peripheral portion of the upper blade plate 16. Plants and the like can be cut like cutting with scissors by the shearing action of the cutting blade 19 and the plurality of cutting blades 20 protruding from the outer peripheral portion of the lower blade plate 17. The driving method of the upper blade plate 16 and the lower blade plate 17 is not limited to the above structure, but at least the upper blade plate 16 and the lower blade plate 17 are rotationally driven in the opposite direction at a low speed in relation to performing a shearing action. Shall be.

As shown in FIG. 3, the gear mechanism is supported by a ring-shaped main body case 22 having a through-hole 21 formed in the center thereof, and the main body case 22 is swingably mounted on the tip of an arm. I do. In the embodiment shown in FIGS. 2 and 3, the main body case 22 of the mowing head 2 is connected to three support rods 23 in consideration of balance.
Which is suspended by a horizontal horizontal shaft 24.
25 and the hanging rod 25 is moved horizontally and vertically.
With this, it is pivotally supported at the tip of the second arm 7. As a result, the mowing head 2 can swing in all directions, and is mounted relatively well. However, the mowing head may be capable of swinging only in a fixed direction instead of in all directions, and the swing mechanism itself may be a universal joint or any other connecting mechanism capable of swinging.

The mowing operation by the mowing machine having the mowing head 2 capable of swinging in all directions will be described with reference to FIGS. 4 and 5. FIG. Mowing head 2 according to the present invention
Is used in a state where the connecting plate 18 of the lower blade plate is in contact with the work surface A for mowing, in the illustrated example, a part below the cutting blade.
When the mowing head 2 attached to the tip is brought close to the work surface by the raising and lowering operation of the arm, the connecting plate 18 is moved along the work surface A as shown in FIG. Grounding in the posture. In this state, when the arm is tilted and the mowing head 2 is pushed forward, the mowing head 2 rotates around the shaft 26 and moves along the work surface A while mowing the grass in the moving direction. . At this time, even if the inclination of the work surface A changes in the front-rear direction, the mowing head 2 moves the work surface A as shown in FIG.
The mowing work is always performed at a fixed height to move while correcting the posture along the road. That is, in the mowing head of the illustrated embodiment, the connecting plate 18 of the lower blade plate 17 functions as a grounding member, but another grounding member that protrudes downward depending on the specific structure of the mowing head, such as a roller, is provided. You can also.

In the direction in which the mowing head 2 is moved, the raising and lowering operation of the arm or the forward and backward movement of the moving machine is performed as shown in FIG.
And the lateral movement due to the turning operation of the turntable 4 on which the arm is mounted can be considered. in this case,
When the inclination state of the work surface A changes in the left-right direction, FIG.
As shown in (a) and (b), the mowing head 2 rotates about the shaft 24 and moves along the inclination of the work surface A, so that mowing work of a constant height is performed. That is, when the mowing head 2 is swingable in all directions, it is possible to move the mowing head 2 while keeping the mowing head 2 in a state parallel to the work surface when moving both vertically and horizontally. However, when the mowing operation is performed by moving the mowing head 2 only in a certain direction, it is not always necessary to be able to swing freely in all directions.

The mowing head 2 of the mowing machine according to the present invention
The upper blade plate 16 and the lower blade plate 17 are rotated at a low speed in the opposite direction, and a plurality of cutting blades 19 protruding from the outer peripheral portion of the upper blade plate 16 and a plurality of protruding outer peripheral portions of the lower blade plate 17 are provided. The cutting blade 20 is used to cut plants and the like. It is extremely difficult for an operator sitting in the driver's seat of the mobile machine to perform an operation of slightly moving the mowing head 2 according to the condition of the work surface. Therefore, there is a high possibility that the cutting blade of the mowing head 2 attached to the tip of the arm itself comes into contact with an obstacle. In this case, if the conventional cutting blade rotates at a high speed, there is a danger that the blade plate is broken and scattered around or repels obstacles. And mowing work can be safely performed.

In the riding mobile mower of the embodiment shown in FIG. 6, the arm that can be raised and lowered is constituted by three arms.
That is, in this embodiment, an extendable third arm 27 is provided on the second arm 7 of the embodiment shown in FIG. 1, and the mowing head 2 is attached to the tip of the third arm 27. Therefore, the mowing head 2 can be moved to a wider range of the work surface by the arm operation.

The up-and-down operation of the first arm 5 and the second arm 7 is performed by rotating the cylinders 9 and 10 about the shafts 6 and 8 as in the embodiment shown in FIG. Is performed by the expansion and contraction operation of the cylinder 28. In the rotation operation of the first arm and the second arm, the flexible shaft 12
Although the power transmission by the second arm 7 and the third arm 27 is possible, the power transmission by only the flexible shaft cannot be performed because the total length changes. Therefore, in the embodiment shown in FIG. 6, power is transmitted to the mowing head 2 attached to the tip of the third arm 27 which expands and contracts by the combination of the spline shaft 29 and the spline boss 30.

More specifically, the spline boss 30 is driven by meshing a gear 31 mounted on the distal end of the flexible shaft 12 with a gear 32 of the spline boss 30 arranged at a fixed position of the second arm 7. Also, spline boss
By meshing the spline shaft 29 provided on the third arm 27 with the 30, power can be transmitted in the axially movable state, that is, inside the telescopic second arm 7 and the third arm 27. A flexible shaft 33 is connected to the tip of the spline shaft 29, and the upper and lower blades of the mowing head 2 are rotationally driven by the flexible shaft 33, whereby the mowing head 2 can freely swing. Like that.

Driving of the arm which can be raised and lowered and both the upper blade plate and the lower blade plate of the mowing head 2 can be driven by the power of a moving machine. That is, the upper blade plate and the lower blade plate of the mowing head 2 can be rotationally driven by the output shaft 11 from which the rotation of the engine of the moving machine is taken out as described above. On the other hand, the cylinders 9, 10, and 28 are driven by a hydraulic pump (not shown) by the engine of the moving machine, and are driven by the hydraulic pressure. It is also possible to rotate the blade plates above and below the mowing head by a hydraulic motor by using the hydraulic pressure of a hydraulic pump that drives the cylinder.

[0019]

According to the mobile mowing machine of the first aspect of the present invention, mowing work can be efficiently performed over a wide range by mounting a moving machine such as a tractor and raising and lowering the arm. At this time, the mowing head mounted on the tip of the arm can swing freely, so that the mowing head swings in response to a change in inclination of the work surface or the like. Therefore, the mowing operation can be performed in a state where the work surface has a uniform height even on a work surface having complicated terrain. Also, the mowing operation involves rotating the upper blade plate and the lower blade plate in the opposite direction at a low speed and cutting it like a pinch, so that even if the cutting blade may come into contact with obstacles, There is no danger of breakage or splashing of obstacles, and the mowing work can proceed safely.

According to the second aspect of the present invention, a wide range of work can be performed with a plurality of arms, and the power of the moving machine can be used as it is for the cutting action of the mower. .

According to the third aspect of the present invention, even if the work area can be covered over a wider range by using a telescopic arm as a part of the arm that can be raised and lowered, the power of the moving machine can be increased. Can be used without any hindrance for the cutting action of the mower.

[Brief description of the drawings]

FIG. 1 is a side view of an entire mower mounted on a front end of a moving machine,

FIG. 2 is a plan view of only a mowing head,

FIG. 3 is a vertical sectional view of only the mowing head,

FIG. 4 is a side view showing a working state of moving the mowing head in the front-rear direction.

FIG. 5 is a side view showing a working state of moving the mowing head in the left-right direction;

FIG. 6 is a side view of the entire mower showing another embodiment mounted on the front end of the mobile machine.

[Explanation of symbols]

1 ... moving machine 2 ... mowing head 3 ... mounting stand
4 ... rotary table, 5 ... first arm, 6 ... axis, 7 ... second arm, 8 ... axis, 9, 10, 28 ... cylinder, 11 ... output shaft, 12, 33 ... flexible shaft, 13 ... sun gear, 14 ... ring gear, 15 ... small gear, 16 ... upper blade plate,
17 ... lower blade plate, 18 ... connecting plate, 19, 20 ... cutting blade, 21
… Through hole, 22… body case, 23… support rod, 24…
Shaft, 25 ... Hanging rod, 26 ... Shaft, 27 ... Third arm,
29 ... Spline shaft, 30 ... Spline boss, 31,32
…gear.

Claims (3)

[Claims] An undulating arm is provided at the front end of a movable machine capable of riding, and an upper blade plate and a lower blade plate disposed on the same axis at the end of the arm are rotated at low speed in opposite directions. A mowing head that cuts plants and the like with a plurality of cutting blades protruding on the outer peripheral portion of the upper blade plate and a plurality of cutting blades protruding on the outer peripheral portion of the lower blade plate is mounted on the tip of the arm. Riding mowing machine characterized in that the mowing head can swing freely with respect to the arm. 2. The upper blade plate, wherein the undulating arm is constituted by a plurality of arms rotatably connected to each other, and the rotational driving force of the moving machine is connected to a mowing head mounted on the tip of the arm via a flexible shaft. 2. The riding mobile mower according to claim 1, wherein the lower blade and the lower blade are driven to rotate. 3. The mowing of the arm tip by using a telescopic arm as an up-and-down movable arm and applying a rotational driving force of a moving machine rotationally driven through a flexible shaft to a power transmission mechanism by a spline shaft in the telescopic arm portion. The riding movable mower according to claim 1 or 2, wherein the upper blade plate and the lower blade plate of the head are driven to rotate.