JPS6156961B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a working device having a working function by vibration or continuous impact via a parallel link arm at the tip of a movable body, and the working device is equipped with the working device. The present invention relates to a working machine suitable for excavation or compaction work that can perform vertical reciprocating motion by means of a link arm while vibration or impact force is applied to the excavation blade or compaction plate.

A power tiller is generally known as a conventional means of excavating soil for agriculture, but because the rotor rotates, the tiller can only excavate the shallow part of the ground surface, and it is not possible to dig deeper than 30 cm below the ground surface. Not suitable if you need it. For example, when cultivating wasteland with deep plant roots into farmland, it is necessary to plow the ground to a depth of 30 cm or more. This requires a means of work such as digging and digging.

A possible condition for automatically performing such excavation work is that the excavation blade attached to the movable body is vibrated or continuously moved up and down, i.e., it is driven into the ground while being subjected to a striking force. After reaching a certain depth, the excavation blade rises above the ground surface, moves forward, and then descends again to the next excavated area to dig into the ground. .

By the way, the work of performing such exercise is as follows:
Needless to say, the present invention can be used not only for the above-mentioned agricultural excavation, but also for excavation work in the field of construction, for example, excavating ground covered with asphalt. Furthermore, the movement of the working device, that is, the movement of the working device itself being able to move up and down in the vertical direction while being subjected to vibration or striking force, is not limited to excavation work, but is also useful in applications such as tamping rammers, vibro compactors, etc. It can also be used for work aimed at compacting the ground.

When a working device capable of such movements is used for excavation work and compaction work in the construction field, it will exhibit significant advantages not found in conventional working devices. For example, when looking at excavation work in the construction field, breakers have traditionally been known for digging up the ground covered with asphalt. There are large-sized ones that are installed on bending/extending arms, and there are no types that fall somewhere in between. Of course, small hand-held breakers are inevitably limited in weight so that they can be held and operated by workers, and vibrations impair the health of workers. Therefore, if you install the breaker on a small machine that is easier to transport than a large crawler-type work machine, you will be able to operate a breaker that weighs more than a conventional hand-held breaker, which will be more efficient, and it will be easier to raise and lower the breaker itself. Since movement operations can be performed by operating the aircraft, it has the advantage of not causing any health problems to the workers.

The same can be said about compaction work in the construction field. For example, in the conventional tamping rammer and vibro compactor, which are known as this type of work equipment, the worker directly holds the vibrating machine while working, so the weight of the machine is necessarily light enough for the worker to operate it. Even though it is limited to a certain amount of equipment and is vibration-isolated, the vibrations of the aircraft are directly transmitted to the workers. In such cases, if the compaction work machine itself is attached to a movable body equipped with its drive source, the compaction work machine itself can be mounted on a machine with limited weight that can be directly held by conventional workers. It can be made to weigh even more than the conventional machine, making the compaction force stronger, and the machine itself performs operations such as lifting and lowering the work equipment, and the worker is not directly exposed to the vibrations of the work equipment, making it easier to carry out work. It has the advantage of being easy to carry out.

The present invention was developed based on the above-mentioned problems with conventional excavation and compaction work in the fields of agriculture and construction. The object of the present invention is to provide a working machine suitable for excavation or compaction work, which is installed so that it can be raised and lowered in the vertical direction via a parallel link-like arm.

Next, an embodiment in which the present invention is applied to an agricultural excavating machine shown in FIG. 1 will be described in detail.
is operated by a worker via a handle 5 that also serves as a protective guard 4 and extends rearward.

Engines 2 are installed at the top and bottom of the fuselage 1, respectively.
Drive rotation shafts 6 and 7 to which driving force is transmitted are provided. As shown in FIG. 3, this upper drive rotating shaft 6 has a sprocket 8 that receives the driving force from the engine 2 at one end, and a working device 19 that will be described later at the other end.
It has a pulley 9 for transmitting rotational force to. Coaxially with this upper drive rotating shaft 6, one end of a pair of upper link arms 13 is rotatable via a support shaft 12 that protrudes above the fuselage bearing boss 10 and the fuselage cover 11 of the rotary shaft 6. It is pivoted like this.

Further, as shown in FIG. 4, the lower drive rotating shaft 7 is rotated by a coaxial gear 14 meshing with a transmission gear 15 to which rotation is transmitted from the engine 2, and a crank 16 is provided at the end of the shaft. axis 1
One end of a lower link arm 18 is pivotally connected to 7.

The tips of the upper link arm 13 and the lower link arm 18 are pivotably attached to both upper and lower ends of the working device 19, respectively, as shown in FIGS. 1 and 5. The tip of the upper link arm 13 protrudes slightly forward than the tip of the upper link arm 13, so the working device 19 is mounted in an inclined manner with the lower part protruding.

Further, the lower end of a connecting rod 20 is further pivotally connected to the crankshaft 17 on the lower drive rotating shaft 7 to which one end of the lower link arm 18 is pivotally connected, and the upper end of the connecting rod 20 is attached to the crankshaft 17 on the lower drive rotating shaft 7 to which one end of the lower link arm 18 is pivotally connected. The book arm is configured to be pivotally connected near the fuselage pivot portion.

The working device 19 supported by the tips of both the upper and lower link arms 13 and 18 is mounted between left and right side plates 21 to which the tips of both the link arms 13 and 18 are pivotally attached, as shown in FIGS. 1 and 5. A vibrating body 22 equipped with an eccentric pendulum 23 and a vibrating rod 24 connected to the lower end of the vibrating body 22 are connected to vibration isolating rubber 25 at both upper and lower ends, respectively.
26,
The lower end of the vibrating rod 24 has a working tool 27 such as a digging blade. The vibrating body 22 is located at the tip pivoting portion of the upper link arm 13, and as shown in FIG. A pulley 29 is provided at the protruding shaft end, and this pulley 29
A belt 30 is stretched between the pulley 9 of the upper drive rotating shaft 6 and the pulley 9.

Note that the working tool 27 attached to the vibrating rod 24 of the working device 19 may include, in addition to the digging blade shown in the figure,
As illustrated in FIG. 6, various items such as a breaker bit 31, a scoop 32, and a compaction plate 33 can be attached.

FIG. 7 shows another embodiment of the working device 19. In this embodiment, in place of the vibrating body 22 in the previous embodiment, a crankshaft 34, an elevating rod 35 that moves up and down by the crankshaft, and a hammer 36 that is struck by the elevating rod are provided. A working tool 27 for excavation or compaction similar to that of the previous embodiment is attached to the lower end of the excavation or compaction work tool 27.

A coil spring 37 is stretched between the upper side of the working device 19 and the tip of the machine body 1, for example, the protection card 4, so that the upper part of the working device 19 is always connected to the machine body 1.
By being pulled to the side, the working device 19 can always maintain an upwardly pulled state when the working device 19 is not performing a working movement.

Further, in the above embodiment, the machine body 1 is driven by the wheels 3, but when the compaction plate 33 shown in FIG. 6 is used as the work tool 27 attached to the work device 19, rollers are used. It's okay.

The working machine according to the present invention has the above-described structure, and in the working machine of the embodiment shown in FIGS. 1 to 6, the rotation of the upper drive rotating shaft 6 is
Vibration is transmitted to the eccentric pendulum shaft 38 of the vibrating body 22 of the working device 19 through the rotation of the eccentric pendulum 23, and the vibration is imparted to the working tool 27 via the vibrating rod 24.

On the other hand, due to the rotation of the crankshaft 17 based on the rotation of the lower drive rotation shaft 7, the connecting rod 20 moves up and down, and the upper link arm 13 is rotated around its body pivot point, that is, the upper drive rotation shaft 6. Therefore, the working device 19 moves up and down with a stroke within the rotation range of the tip of the upper link arm 13. By the way, since this working device 19 is supported via the parallel links of the upper and lower link arms 13 and 18, it moves up and down while maintaining the tilted state, but the lower link arm 18 on the body pivot side is connected to the crank. Since it is pivotally connected by the shaft 17,
The lower link arm 18 performs a reciprocating movement in the front and back direction, and swings the lower end of the working device 19 in the back and forth direction in the course of its up and down movement. Therefore, the working device 19 is connected to the upper link arm 13
The working tool 27 at the lower end is assumed to move up and down by the rotation of the lower link arm 18, while the lower end swings back and forth by the back and forth movement of the lower link arm 18. As shown by the arrow, the machine body 1 first excavates into the ground, and from the lowest point it rotates forward and is pulled upwards, that is, the D
This means that the movement is based on the locus of the character shape.

Such a D-shaped trajectory movement of the work implement 27 is
This is useful for carrying out work while the machine body 1 continues to move slowly forward via the wheels 3.

The D-shaped trajectory movement of the working device as described above is suitable when the purpose of work is excavation, but is not particularly required when the purpose of work is compaction. Therefore, when using this machine for compaction work, the work equipment 1 must be moved until the compaction plate is placed on the ground surface.
9 is lowered, the clutch of the lower drive rotating shaft 7 is disengaged, and rotation is not transmitted to the crankshaft 17, so that the working device 19 can work only by the vibration caused by the vibrator 22. Bye.

In the embodiment shown in FIG. 7, the crankshaft 3 of the working device 19 is
4 rotates, and the lifting rod 35 moves up and down to continuously strike the hammer 36, and the work implement 27
performs a continuous striking motion that is different from vibration.

In the case of this impact movement, as in the case of vibration, when the work is for the purpose of excavation, the work device 19 is reciprocated up and down by the rotation of the upper link arm 13 while the work continues, and the work is continued for the purpose of compaction. The work continues with the vertical and reciprocating movement of the work device 19 stopped.

As described above, the working machine according to the present invention is provided with driving rotation shafts 6 and 7 at the upper and lower parts of the tip of the machine body 1, and parallel link-shaped arms 13 and 7 from the shaft parts.
18 is provided protrudingly to support the working device 19, and the operating rotating shaft for vibration or crank rotation provided on the working device 19 is rotated from the upper drive rotating shaft of the machine body. The powered working device 19 is supported by the machine body 1, and therefore can be large and heavy compared to, for example, a conventional hand-held breaker, tamping rammer, or vibro compactor. Work efficiency can be significantly improved.
Of course, in that case, the vibrations and impact caused by the striking force caused by the excavation or compaction work by the work device 19 are largely absorbed by the swinging of the upper and lower link arms 13 and 18, and the worker operating the machine body 1 is not affected by the vibration or impact. It has the advantage of not causing health problems.

Furthermore, the lower link arm 18 is moved in the longitudinal direction by the crankshaft 17, and the connecting rod 2 connected to the crankshaft 17 and the upper link arm 13
By rotating the upper link arm 13 by the rotation of the upper link arm 13, the working device 19 can perform vertical reciprocating motion based on the D-shaped locus motion. First, it is possible to perform excavation work with the machine body 1 advanced, and this type of excavation work can be performed efficiently, and it can be used for both excavation and compaction work. It can be made into a practical working machine that can be used for many purposes.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an embodiment of the working machine according to the present invention, Fig. 2 is a plan view, and Fig. 3 is the same as Fig. 1.
4 is a sectional view taken along the same line, FIG. 5 is a front view of the working device, and FIG.
The figure is a perspective view showing an example of a working implement attachment attached to this working machine, and FIG. 7 is a sectional view showing another embodiment of the working device attached to this working machine. In the figure, 1... fuselage, 2... engine, 3... wheels, 5... handle, 6... upper drive rotating shaft, 7... lower drive rotating shaft, 13... upper link arm, 17... crankshaft, 18... lower link arm, 19...Working device,
20... Linking rod, 22... Vibrating body, 24... Vibrating rod, 27
... Working instrument, 38... Oscillator pendulum shaft, 30... Belt, 34... Crank shaft, 35... Lifting rod, 36... Hitting bar, 37... Coil spring.

Claims (1)

[Claims] 1. Driving rotation shafts are provided at the upper and lower parts of the tip of the body, which is movable via wheels or rollers,
Both upper and lower ends of the working device are pivotally supported by an upper link arm that is coaxially connected to the upper drive rotating shaft and a lower link arm that is pivotally connected to the crankshaft on the lower drive rotating shaft. The crankshaft that pivotally connects the link arm and the upper link arm are connected by a connecting rod, and the working device receives rotational force from the upper body drive rotating shaft via a belt or the like coaxially with the upper link arm pivot joint. A working machine characterized by having a rotating shaft for operation, and a working tool for excavating or compacting by vibration or impact caused by rotation of the rotating shaft. 2. The working device has a vibration excitation body installed on the rotating shaft for operation, and a vibration rod integrally provided with the vibration vibration body, which is supported via a vibration isolator, and the lower end of the vibration rod is excavated or tightened. A work machine according to claim 1, which is intended for work using vibration and has a hardening work tool. 3. The work equipment has a lifting rod that moves up and down by the crankshaft of the rotating shaft for work, and a working tool for excavation or compaction that is hammered in the vertical direction through this lifting rod. A working machine according to claim 1.