JPH0522030Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is based on the following: A swinging arm that can freely swing back and forth from side to side around the vertical axis is attached to the traveling aircraft, and a circular plate is attached to the front end of this swinging arm. A weed cutter that is equipped with a mowing blade and a drive mechanism that drives and oscillates the oscillating arm at equal angles to the left and right with the oscillation center centered on an imaginary line in the longitudinal direction of the machine passing through the fulcrum of the oscillating arm. Regarding machines.

[Conventional technology]

Conventionally, in the above-mentioned weed trimmer, the swinging fulcrum of the swinging arm has been arranged on the longitudinal center line of the traveling body.

[Problem that the invention attempts to solve]

However, as mentioned above, if the swinging fulcrum of the swinging arm is placed on the longitudinal center line of the traveling machine, the swinging angle of the swinging arm must be increased in order to move the cut weeds to one side. As a result, the swinging reaction force of the swinging arm increases, and the balance of the aircraft greatly deteriorates.

In addition, in order to suppress the deterioration of the balance of the aircraft,
It is conceivable to attach a heavy balance weight to the swinging arm to absorb the swinging reaction force, but in this case, as the weight of the swinging arm increases, the swinging arm will be driven to swing. The drive device had to be made larger, and there was room for improvement.

An object of the present invention is to minimize the deterioration of the aircraft balance due to the swinging of the swinging arm while downsizing the drive structure of the swinging arm.

[Means for Solving the Problems] The characteristic configuration of the present invention is that the swinging fulcrum of the swinging arm is offset to one lateral side on the grass clipping release side with respect to the center line in the longitudinal direction of the traveling machine. At the same time, the swinging arm is extended rearward from the swinging fulcrum, and a balance weight for absorbing swinging reaction force is attached to the extended portion with the swinging arm being moved toward the center line in the longitudinal direction of the aircraft. At the point.

[Effect]

By providing the swinging fulcrum of the swinging arm at a position deviated to one side of the grass clippings discharge side as described above, the weeds cut by the drive-rotated disk cutting blade can be moved to one side of the grass cuttings. The swinging angle of the swinging arm for discharging air to other parts can be made smaller than that of the conventional swinging arm provided at the longitudinal center line of the traveling body.

In addition, by installing the balance weight for absorbing the swinging reaction force of the swinging arm in a state closer to the center line in the longitudinal direction of the aircraft, the center of the balance weight that shifts as the swinging arm swings can be removed. It is possible to keep the weight deviation position small.

[Effect of idea]

Therefore, by providing the swinging fulcrum of the swinging arm at a location offset to one side, the swinging angle of the swinging arm can be made smaller than in the past. By making the balance weight for absorbing dynamic reaction force lightweight, it has become possible to miniaturize the drive mechanism of the swing arm and to suppress deterioration of the balance weight of the traveling aircraft as much as possible.

Furthermore, by arranging the balance weight as described above with respect to the rearward extending portion of the swinging arm,
Since it is possible to suppress the amount of weight deviation of the balance weight with respect to the center of the aircraft body, which deviates due to the swinging of the swing arm, it is possible to suppress the deterioration of the balance of the traveling aircraft even more effectively from this point of view. It can be done.

〔Example〕

As shown in FIGS. 2 and 3, a crawler traveling device 1, auxiliary wheels 2 disposed on both sides of the crawler traveling device 1, and a drive mechanism for the crawler traveling device 1 and a swing arm 3, which will be described later. A weed cutter is constructed by installing a reaping device A at the front of a traveling machine body consisting of an engine E, a transmission case M, and the like.

The reaping device A is composed of a swinging arm 3 attached to a traveling machine body so as to be able to swing back and forth from side to side around a vertical axis, and a disc cutting blade 4 attached to the front end side of this swinging arm 3. be.

As shown in FIG. 1, the swing arm 3 is movably connected to a rotary plate 5 provided on the fuselage frame F via a swing link 6. Further, the rotating shaft 7 of the rotary plate 5 and the output shaft 8 provided at the rear of the transmission case M are interlocked and connected via a belt transmission mechanism 9, and the output from the engine F is transmitted to the transmission case M and the belt. By transmitting the signal to the swing arm 3 via the transmission mechanism 9, the swing arm 3
An imaginary line X in the longitudinal direction of the aircraft passing through this swing fulcrum
It is configured so that it can be driven and oscillated at equal angles to the left and right with the oscillation center being the oscillation center.

The disc cutting blade 4 is configured in an inclined position such that it is located lower toward the grass clipping release side, that is, toward the right side,
By driving and swinging the swing arm 3, the weeds cut by the driven and rotated disc cutting blade 4 can be brought to the right side of the machine body.

The disc cutting blade 4 is interlocked and connected to a cylindrical shaft 11 disposed above the traveling machine body via a rotating cable 10, and an output shaft 12 protruding from the cylindrical shaft 1 and the front part of the engine E. are interlocked and connected via a belt transmission mechanism 13, and the disk cutting blade 4 is driven and rotated by transmitting the output from the engine E to the rotating cable 10 via the belt transmission mechanism 13. be.

The swinging fulcrum of the swinging arm 3 is provided at a portion that is offset to one side on the grass clipping release side, that is, to the right side, with respect to the center line Y in the longitudinal direction of the traveling machine body, and a circular plate The swing angle of the swing arm 3 for releasing the weeds cut by the cutting blade 4 to the right lateral side can be made small.

The swinging arm 3 extends rearward from the swinging fulcrum, and a plurality of balance weights 14 for absorbing swinging reaction force are attached to the extending portion in a state shifted toward the center line Y side in the longitudinal direction of the fuselage, The amount of weight deviation of the balance weight 14 with respect to the center of the body, which is deflected as the swing arm 3 swings, can be suppressed to a small value.

The balance weight 14 is removably screwed into a plurality of mounting holes 15A formed in a mounting base 15 welded to the swing arm 3.

The swing arm 3 consists of a proximal cylindrical member 3A pivotally attached to the traveling body side, and a distal end cylindrical member 3B slidably fitted into the cylindrical member 3A. A pair of bolts 16,1 provided in 3A
By operating 6, the length of the swing arm 3 can be changed.

Incidentally, reference numeral 17 shown in FIG. 3 is a grounding wheel that receives a load applied to the front part of the traveling body.

[Another example]

In the embodiment described above, the engine E is used as the drive mechanism for driving and swinging the swing arm 3, but it may be driven and swinging by an electric motor, and the specific configuration of the drive structure can be changed as appropriate.

Further, in the embodiment described above, the swinging fulcrum of the swinging arm 3 is provided on the right lateral side with respect to the center line Y in the longitudinal direction of the traveling body, but it may be provided on the left lateral side.

Furthermore, in the embodiment described above, two metal balance weights 14 were attached to predetermined positions on the mounting base 15, but the balance weights 14 may have water or sand stored inside them, as shown in FIG. After removing the cap 18 that closes the opening 14a, fill it with an appropriate amount of water or sand and place it in a predetermined position on the mounting base 15. It may be installed.
Note that 19 shown in the figure is a discharge valve for discharging water or sand.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of drawings]

The drawings show an embodiment of the weed cutter according to the present invention, and FIG.
The figure is a front view, FIG. 3 is a side view, and FIG. 4 is a perspective view showing another embodiment of the balance weight. 3... Swinging arm, 4... Disc cutting blade, 14...
Balance weight, E... Drive mechanism, X... Virtual line, Y... Center line.

Claims (1)

[Scope of utility model registration request] A swinging arm 3 that can freely swing back and forth from side to side about the vertical axis is attached to the traveling machine body, and a disc cutting blade 4 is attached to the front end side of this swinging arm 3, and a swinging fulcrum of the swinging arm 3 An imaginary line X in the longitudinal direction of the aircraft passing through
The weed cutter is equipped with a drive mechanism E that drives and swings the swinging arm 3 at equal angles left and right with the swinging center at The swing arm 3 is provided at a portion offset to one side on the grass cutting release side with respect to the center line Y in the longitudinal direction, and the swing arm 3 extends rearward from the swing fulcrum, and a swing counter is provided at the extending portion. a weed trimmer in which a force-absorbing balance weight 14 is mounted in a state closer to the center line Y side in the longitudinal direction of the machine;