JP2012147718A - Grass mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of performing works such as mowing and loading with simpler motions for an attachment to be attached to the distal end of a hydraulic shovel capable of performing the works as mowing and loading of grass, etc.SOLUTION: The grass mower includes: a base part supported to an arm of the hydraulic shovel; a swing part which can swing in the lateral direction relative to the base part; a wrist swing part which is rotatable in the limited range of angle to the swing part; a working implement disposed in the wrist swing part; a trimmer for mowing grass, etc. disposed in the working implement; and a grip disposed above the trimmer for holding the grass, etc. with the motion in the same direction as the longitudinal direction of the trimmer. When the grass mower is turned while operating the trimmer to trim the grass, the grass is collected in the grip disposed above the trimmer, and the grass is held and loaded.

Description

The present invention relates to a mowing machine provided with a felled material moving mechanism that is attached to a tip portion of a hydraulic excavator and moves a felled product cut by a blade.

A large amount of plants such as weeds grow on a vast land such as a riverbed or a factory construction site, and it takes time to remove these plants by hand. In most cases, a gripping device is attached to the excavator, and the excavator is loaded and unloaded.
In addition, mowing machines equipped with a rotary cutting blade at the tip of a hydraulic excavator and a working machine equipped with a felling movement mechanism for moving the grass cut by the mowing machine are now mowing.

As shown in FIG. 8, Japanese Patent Laid-Open No. 2002-335733 is disclosed. This mower 8 is attached to a housing 83 attached to a front portion of an arm 81 of a hydraulic excavator and a bucket cylinder 82, and a disc 85 connected to a hydraulic motor 84 and provided with a cutter 86 on the outer periphery is attached. This is a mowing machine that can also be mowing and loading by attaching a gripping device 87 to the mower.

JP 2002-335733 A

However, when cutting the grass, the conventional mower scatters pebbles and empty cans hidden in the grass in order to rotate the disk 85 provided with the blade 86 by the hydraulic motor 84. There is a danger of pebbles flying to the car or building glass. In addition, there is a risk of injury if there are people around. Therefore, the place of use is limited. In addition, the conventional mowing machine collects human power when the grass is small after cutting the grass, and if the grass is not raised in a mountain shape, it cannot be sandwiched between the gripping devices 87 and loaded on the transport vehicle. The joint work of was necessary.

A boom provided to be rotatable in an up-and-down direction with respect to an upper swing body including an cab; an arm provided to be rotatable in an up-and-down direction with respect to the boom; and a bucket supported by the arm, In a construction machine that excavates earth and sand with the bucket by driving the boom and the arm, a base portion supported by the arm, a swinging portion that can swing left and right with respect to the base portion, A wrist swinging portion that is rotatable in a limited angle range, the wrist swinging portion is provided with a working tool, the working tool is provided with a clipper that cuts grass or the like, and an upper portion of the clipper has a longitudinal direction of the clipper. A mowing machine is provided, which is provided with a grip portion that can grip grass or the like in the same direction.

In the mowing machine of the present invention, each operation of cutting and loading can be performed efficiently with simpler work operations. Mowing, collecting, and loading work on steep slopes that were difficult even in manual work can be performed efficiently. Because it is a hydraulically driven clipper, it has a large driving force and can make a single blade large, so it can be used not only for weeds but also for sugarcane, corn, tree branches, pruning hedges, pruning roadside trees, cutting thin bamboo forests, etc. is there. In addition, the clipper blade allows safe operation without pebbles scattering.

Embodiments of the present invention will be described with reference to the drawings. 1 to 4, a mower 10 according to the present embodiment includes a base portion 11 connected to an arm tip of a hydraulic excavator, and a swinging portion 20 attached to the base portion 11 so as to be swingable in the left-right direction. The wrist swinging portion 30 that can rotate within a limited angle range with respect to the swinging portion 20, and the mowing machine 10 is attached to the wrist swinging portion 30. The mower 10 includes a clipper 50 for mowing at the bottom, and a grip 40 having two curved arms at the top of the clipper 50.

The base portion 11 is pin-coupled to the link 106 connected to the rod of the bucket cylinder 105 (see FIG. 4) through the upper pin hole, and is pin-coupled to the tip of the arm 107 (see FIG. 4) through the lower pin hole. The base cylinder 11 swings up and down with respect to the arm 107 about the axis A of the lower pin hole by extending and contracting the bucket cylinder 105 (A-axis swing range shown in FIG. 2). It has become. At the end of the A-axis swinging range in the lowering direction, the grass accumulated on the gripping portion 40 can be loaded on a dropper or the like from above the gripping portion 40 instead of the clipper side.
Further, on the outside of the base part 11, a swing part worm speed reducer 21 is mounted as a drive source for swinging the swing part 20, and the B-axis core (see FIG. 2) of the swing part worm speed reducer 21 is the base. The part 11 extends in the vertical direction.

The oscillating portion 20 is configured to oscillate to the left and right with respect to the base portion 11 about the B axis when the oscillating portion worm speed reducer 21 outside the base portion 11 is operated. Further, the B-axis swing range is shown in FIG.

The wrist swinging portion 30 is provided with a wrist swinging portion worm speed reducer 31 at a position extending further forward in the middle of the swinging portion 20. When the wrist swinging part worm speed reducer 31 is operated, it rotates within a limited angle range around the C axis. FIG. 3 shows the C-axis swing range.
The clipper blade 50 has a rotation angle exceeding 180 degrees from vertically upward to vertically downward.
In the present invention, the rotation is performed within a limited angle range, but a full turn may be used. However, in the case of a full turn, a limited angle range is desirable because equipment such as a mechanism for sending hydraulic pressure to the clipper hydraulic motor and a swivel joint mechanism are greatly increased in weight.

The swing part B-axis and the wrist swing part C-axis are perpendicular to each other. As the distance between the perpendicular point and the A-axis core is shorter, the amount of movement when the clipper 50 is adjusted to the slope in the preparation step in FIG. 5 becomes smaller.

Since the swing part worm speed reducer 21 and the wrist swing part worm speed reducer 31 are merely moved to change the posture in a no-load state in the preparation process for adjusting the mower 10 to the slope or the like, a large driving force is required. do not do. Therefore, it can be driven by the electric power of the vehicle battery of the hydraulic excavator. However, the above two worm reducers may be changed to swing motors with the optional piping of a hydraulic excavator. The swing motor is a device that rotates and swings within an angular range limited by hydraulic pressure.

The grip portion 40 is configured to sandwich the grass between a pair of left and right semi-cylindrical curved surfaces. Since the drive source requires a certain gripping force, a commercially available electro-hydraulic unit 41 is equipped.
The electro-hydraulic unit 41 is unitized by integrating a DC motor, a hydraulic oil tank, a gear pump, a valve mechanism, and a hydraulic cylinder, and rotates the DC motor from a hydraulic excavator battery via a control switch, and adds hydraulic oil with a gear pump. The structure is such that the piston rod of the hydraulic cylinder is expanded and contracted by pressing.
In the present invention, an electro-hydraulic unit is used. However, the hydraulic cylinder may be extended and retracted by directly pulling the hydraulic pressure from the optional piping of the hydraulic excavator.

The installation height adjusting wheel 60 may touch the ground or bite into the ground when the mower 10 moves on the slope while mowing the grass. In order to prevent this, the clipper 50 is installed below both ends in the longitudinal direction. It has a function to keep the distance between the ground plane such as a slope and the clippers 50 constant. Depending on the local conditions of mowing grass, for example, mowing the slopes of the local area where the foundation maintenance project in the hilly and mountainous area was conducted, etc., because the surface of the slope is accurately leveled, the contact height adjustment wheel 60 The clipper 50 does not come into contact with the ground even if the height (the distance between the ground plane such as the slope and the clipper) is lowered, but the slope where the natural hand is not applied is Since the surface is not flat, it is necessary to increase the height of the contact height adjustment wheel 60. The adjustment method is a screw structure or the like that is adjusted by rotating with a tool.

FIG. 4 is a work situation diagram of the mower of the present invention. The upper rotating body 101, the traveling body 102, the boom 103, the arm 104, the bucket cylinder 105, the link 106, the extension arm 107, and the mower 10 are configured. The extension arm 107 is for expanding the working radius of the upper swing body 101, and a standard one is used with the mower 10 attached directly to the arm 104.

FIG. 5 is a diagram showing a work process of the mower of the present invention. FIG. 5 shows a mowing method when the slope is on the upper side. First, move the excavator to the front of the slope that cuts the excavator and adjust the direction of travel. Then proceed with the next step.
Preparation process Move the mower closer to the slope and operate the A axis to level the mower.
2. Operate the B axis to align the clipper longitudinal direction with the slope direction.
3. Operate the C-axis and install the clipper bottom (mowing height adjustment wheel) on the slope surface.
Logging process 1. Start the clippers and mow the mower while moving the mower along the slope.
2. The mower moves up the slope and stops the clipper when mowing is finished. At that time, if there is a lot of grass collected on the gripping surface, grip it.
Move the loading stroke mower, dump the A-axis and turn the mower upside down to load it into a car. When the grass is gripped, the gripping device is opened.

FIG. 6 is a diagram showing a work procedure of the mower according to the present invention. When the slope for cutting the grass is on the upper side, when the grass is cut in the direction of the arrow from the state of c on the upper side in the figure, the gripping opening surface of the mower becomes downward, so that the collected grass cannot be gripped. Therefore, grass cannot be collected well unless it is cut in the direction from a to b in the figure. Therefore, first cut the grass in the order of 1.2.3. Then cut the grass in the order of 4.5.6.
In the case where the slope for cutting the grass is on the lower side, when the grass is cut in the direction of the arrow from the state of the lower side d in the figure, the gripping opening surface of the mower is inclined from the horizontal, but at first there is little grass collected, In the state e, the grip opening surface is almost horizontal, so that the grass is well collected on the grip portion.

In the case where the slope of cutting the grass in FIG. 6 is on the lower side, if the mower is moved from the state d to the state f, the clipper surface and the slope are not aligned. This is because the contact angle between the clipper surface and the slope changes depending on the turning operation of the hydraulic excavator. When the slope for mowing the grass is on the upper side, the clipper surface and the slope are not matched in the same manner when the mower is moved from the state c to the lower side. In order to cope with this change, it is necessary to swing the A-axis in FIG. This operation cannot be performed well by an operator of the hydraulic excavator without skill. However, when cutting a short section as in the operation of 4.5.6. Of FIG. 6, the amount of change in the A axis is small, so that cutting is possible without swinging.

The mowing capacity of the mower according to the present invention is considerably higher than that of a 100-volt motor-driven clipper because the clipper drive source is taken from the hydraulic excavator's optional piping (generally breaker piping). have power. Therefore, the clipper blade can be enlarged, and it has the ability to cut thin bamboo and small diameter trees. Therefore, the use of the mower of the present invention can also be applied to weeds, sugar cane, corn, tree branch dropping, hedge pruning, street tree pruning, thin bamboo forest cutting, and the like. In FIG. 3, the clipper is swung upward and operated from below to above, which is effective for pruning in the vertical direction. Further, by operating the gripping portion by swinging the clipper downward, it is possible to grip grass that has been collected and load it on a car or the like.

The gripping part of the mower of the present invention has a structure that is installed on the upper part of the clipper and holds the cut grass with the curved double arms 4a and 4b. As an application example of the grip portion, a shape as shown in FIG. 7 is also possible. High-height grass, thin bamboo, sugar cane, etc. can be cut, moved and loaded without falling even in the shapes of A and B in FIG.

It is a perspective view of the mower of the present invention. It is the top view and front view of the mower of this invention. It is a side view of the mower of the present invention. It is a work condition figure of the mower of the present invention. It is the figure which showed the work process of the mower of this invention. It is the figure which showed the operating point of the mower of this invention. It is the figure which showed the example of application of the holding part of the mower of this invention. It is side surface sectional drawing of the mower in a prior art.

10 Mower 11 Base
20 oscillating part 21 oscillating part worm speed reducer 30 wrist oscillating part 31 wrist oscillating part worm speed reducer 40 gripping part 4a gripping arm 4b gripping arm 41 electric hydraulic unit 50 clipper part 51 hydraulic motor for hair clipper 60 mowing height adjustment Wheel

101 Upper swing body
102 traveling body 103 boom 104 arm 105 bucket cylinder

Claims (1)

A boom provided to be rotatable in an up-and-down direction with respect to an upper swing body including an cab; an arm provided to be rotatable in an up-and-down direction with respect to the boom; and a bucket supported by the arm, In a construction machine for excavating earth and sand with the bucket by driving the boom and arm,
A base part supported by the arm, a swing part swingable in the left-right direction with respect to the base part, a wrist swing part rotatable within a limited angle range with respect to the swing part, and the wrist swing The part is equipped with work tools,
The working tool includes a clipper that cuts grass or the like, and an upper portion of the clipper includes a gripping unit that can grip the grass or the like by an operation in the same direction as the clipper longitudinal direction.

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