JP3328016B2 - Excavator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an excavator capable of cutting a root soil of a tree into a hemisphere.

[0002]

2. Description of the Related Art A digging machine having a semicircular blade is installed at the front of the fuselage so as to be able to descend, and the blade is rotated while oscillating back and forth to cut a tree root soil into a hemisphere. For example, it is known in JP-A-59-147880. It has also been proposed to attach a crane device to the excavator in order to lift the cut root pot (Japanese Utility Model Application No. 4-61428).

FIG. 8 is a side view showing a main part of a conventional crane device, in which a vertical mounting shaft A is provided at a front portion of the machine, and a support base B can be pivoted on the vertical mounting shaft A from side to side. At the same time, the base D that supports the arm C of the crane device from the support B is erected.

[0004]

Therefore, when the digging device is raised during traveling or the like, the digging device cannot be sufficiently raised due to interference between the digging device and the crane device depending on the left and right positions thereof. was there. The digging equipment is much heavier than this machine, so if the elevation is not enough,
In some cases, the center of gravity was left behind, and the digging device was held on the ground or the like to hinder travel. The present invention has been made to solve such a problem, and the crane device is positioned as rearwardly as possible to prevent this interference, and at the same time, the turning property of a base column constituting the crane device with respect to a vertical mounting axis is improved. Things.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a digging device having a blade which vibrates and rotates is mounted on a front portion of the machine so as to be capable of turning left and right and lowering. In an excavator equipped with a crane device that supports a telescopic arm that can be raised and lowered with a base that stands upright from a support table that can be turned to the left and right on a vertical mounting shaft provided in the front part, the base and the vertical mounting An excavator is provided, wherein an axis and an axis overlap in a side projection plane.

[0006]

By taking the above measures, the base of the crane device can be positioned more rearward than in the prior art, and interference with the digging device can be prevented. In addition, the amount of overhang of the base from the vertical mounting shaft is reduced, and the turning property is improved. Furthermore, the center of gravity of the whole including the crane device can be shifted rearward, so that the traveling performance and the maneuverability are excellent.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a side view of the digging machine according to the present invention, and FIG. 3 is a plan view of this digging machine.
Is equipped with a digging device 12 and a crane device 14 at the front.

The excavating device 12 comprises a machine frame 18 attached to the front of the machine 10 via a hitch body 16 and a semicircular blade 20 provided in front of the machine frame 18. The hitch body 16 is attached to the vertical support shaft 22 provided on the machine 10 so as to be able to turn left and right by expansion and contraction of a hydraulic cylinder 24 interposed between the hitch body 16 and the machine 10.
Is mounted so as to be able to descend by expansion and contraction of a hydraulic cylinder 30 interposed between a horizontal support shaft 26 provided on the hitch body 16 and a bracket 28 extending backward from the hitch body 16.

From one side of the machine frame 18, a bracket 3
2, a hook-shaped holder 34 is provided, and the bracket 32 and a drive shaft 36 projecting from the front end of the machine frame 18 support the front and rear ends of the blade 20, respectively. The blade 20 is rotated while vibrating back and forth in the rotation direction, whereby the root soil of the tree can be cut off in a hemispherical shape. The vibration rotation of the blade 20 is given by a vibration generator 38 and a rotation driver 40 provided in the machine frame 18, and the details thereof will be described in detail in the above-mentioned Japanese Patent Application Laid-Open No. Hei 5-103630. Therefore, the description here is omitted.

The crane device 14 includes a base 42 and a base 4
2 supported by an arm 44. The base 42 can turn right and left around a vertical mounting shaft 46 provided at the front of the machine 10 and beside the digging device 12 by the expansion and contraction of a hydraulic cylinder 48 interposed between the machine 10 and the vertical axis. It is erected from the support table 50 to be attached. The arm 44 includes the base 4
2 and a hydraulic cylinder 54 between the arm 44 and the base 42.
Is provided, the arm 44 can be lowered by the expansion and contraction of the hydraulic cylinder 54. On the other hand, a sub-arm 56 is slidably accommodated in the arm 54, and a hydraulic cylinder 58 is interposed between the two.
Can expand and contract with 4.

FIG. 1 is a partial cross-sectional side view showing the relationship between the vertical mounting shaft 46 and the support table 50, both of which are configured to overlap in a side projection plane. That is,
The support base 50 is moved backward until the vertical mounting shaft 46 enters the support base 50, and the base 42 is erected from above. As a result, the distance between the crane device 14 and the digging device 12 is widened, and even when the digging device 12 is at a plane position where the digging device 12 interferes with the crane device 14, the rising angle can be made large.

In this connection, the hitch body 16 may be moved backward, and the hitch body 16 and the support 50 of the crane device 14 may overlap in the side projection plane (FIG. 2).
reference). In this case, the digging device 12 and the crane device 14
However, there is an advantage that both the excavating device 12 and the crane device 14 approach the machine 10 side, the center of gravity shifts rearward, and the longitudinal length of the machine becomes shorter. Further, a hydraulic cylinder 48 for turning the crane device 14 right and left is provided obliquely across the hitch body 16. By doing so, the hydraulic cylinder 48 can be brought closer to the machine 10 side (there is less chance of interfering with other members) and can be mounted in the most efficient direction.

FIG. 4 is a partial plan view of the arm 44.
The outer surface of a cylinder stay 60 connected to the side wall of the sub arm 46 and connecting the hydraulic cylinder 48 is covered with a wide band-shaped cover 62.
And bent in a side view (see FIG. 2). The number of parts is reduced to reinforce the sub arm 46. A hook 64 that can be hooked with a rope or the like is attached to the upper surface of the inclined portion of the band-shaped cover 62, and a cushioning material made of rubber or the like is used to prevent the tip surface and the lower surface of the inclined portion from being damaged even if an object hits the same. 66 is attached.

By the way, the crane device 14 is used when lifting a tree whose root soil is cut into a hemispherical shape by the excavating device 12, and at this time, the excavating device 12 is lowered by the weight of the tree. May not be lifted properly. In such a case, turning down the blade 20 of the digging device 12 and standing it on the ground can prevent the digging device 12 from lowering. On the other hand, at the time of digging work, the digging device 12 may rise due to resistance from the soil and the blade 20 may not cut into the ground. In such a case, when the tree is hung by the crane device 14, a force for pushing the excavating device 12 downward acts, and the lifting thereof can be prevented.

The above operations are performed using a hydraulic motor and a hydraulic cylinder. Switching of a directional control valve (not shown) for controlling the hydraulic motor and hydraulic cylinder is performed by operating a control facility centrally disposed near a seat 68 of the machine 10. Do it. That is, the turning and raising of the digging device 12 is performed by the left and right movement and the front and rear movement of the digging turning and raising lever 70, and the turning and raising of the crane device 14 is performed by the left and right movement and the front and rear movement of the crane turning and raising lever 72. It is performed by stepping on the left and right of the crane telescopic pedal 74, respectively.

Further, the vibration of the blade 20 is caused by depressing a blade vibration pedal 76, and the blade 20 is rotated by a blade rotation lever 78.
Press each of them. FIG. 7 shows the blade vibration pedal 7.
6, the blade vibration pedal 76 is rotatably connected to the mounting rod 80 by a pin 82. Then, when not used, it is rotated upward. In this way, a step error can be prevented, and a space in this portion is opened.

In addition, the left and right drive wheels 84 provided on the machine 10 are also driven by hydraulic motors (not shown), and the start thereof is performed by pushing and pulling the left and right traveling levers 86 and 88. At this time, the flow rate (aircraft speed) is adjusted by the amount of movement of the traveling levers 90 and 92 and the pushing and pulling of the accelerator lever 94.

FIG. 5 is a side view around the hitch body 16 and FIG. 6 is a front view. The rear end of the side wall of the hitch body 16 is formed in a concave shape 96 with a center recessed forward, and a vertical wall 98 is formed. Are provided with holes 100 (two in this example), from which a hydraulic hose 102 is passed. It is necessary to extend the hydraulic hose 102 from the machine 10 side to the rotary drive 40 of the digging device 12 and the hydraulic cylinder 30 for elevating. It is necessary to take a long one in consideration of turning, and it may be rubbed and cut. However, extending from the concave portion 96 of the hitch body 16 through the hole 100 allows the center of the fuselage to pass through and solves this situation.

[0019]

As described above, since the present invention has been described above, the following effects can be expected. That is, since the base for supporting the arm in the crane device and the vertical mounting axis for supporting the base so as to be able to turn left and right are overlapped in the side projection plane, the crane device must be located rearward. , The distance between the digging device and the digging device can be widened to increase the rising angle, which has a favorable effect on the traveling performance and maneuverability. In addition, the amount of overhang from the center of rotation of the support base is reduced, and the turning performance is improved. Furthermore, since the digging device can also be moved rearward, it is possible to reduce the length in the front-rear direction, thereby improving both traveling performance and maneuverability.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional side view of a main part showing attachment of a crane device.

FIG. 2 is a side view of the excavator.

FIG. 3 is a plan view of the excavator.

FIG. 4 is a partial plan view of the crane device.

FIG. 5 is a side view of a main part showing a hitch body.

FIG. 6 is a front view of a main part showing a hitch body.

FIG. 7 is a side view of a main part of the blade vibration pedal.

FIG. 8 is a partial cross-sectional side view of a main part showing attachment of a conventional crane device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 This machine 12 Excavating device 14 Crane device 16 Hitch body 20 Blade 22 Vertical support shaft 26 Horizontal support shaft 42 Base column 44 Arm 46 Vertical mounting shaft 48 Hydraulic cylinder 50 Support base

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-58-212728 (JP, A) JP-A-59-147880 (JP, A) JP-A-4-53422 (JP, A) 26848 (JP, U) Japanese Utility Model Showa 58-141377 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) A01G 23/04 501

Claims (3)

(57) [Claims] 1. A digging device having a blade that vibrates and rotates is mounted on a front portion of the machine so as to be capable of turning left and right and raised, and is supported on a vertical mounting shaft provided on the front portion of the machine so as to be able to turn left and right. In a digging machine equipped with a crane device that supports a telescopic arm with a base that stands upright from a stand, the base and the vertical mounting axis overlap in the side projection plane. And excavator. 2. The mounting of the digging device to the machine is performed by mounting a hitch body having a horizontal support shaft on a vertical support shaft provided at the front of the machine so as to be able to turn left and right, and raising the digging device on the horizontal support shaft. 2. The excavator according to claim 1, wherein the hitch body and the support of the crane device are overlapped in a side projection plane while being configured so as to be mounted as possible. 3. A hydraulic cylinder for turning the support base from side to side, wherein the hydraulic cylinder is obliquely provided between the support base and a front portion of the machine so as to overlap with the hitch body in the lower projection plane. Excavator.