JPH0835240A - Blade device of gyratory excavator - Google Patents

Abstract

PURPOSE:To increase the excavating capacity around legs of a gyratory excavating machine with a blade device. CONSTITUTION:Right and left soil-discharging plates 11R, 11L are rotatably attached with pins 12 respectively at the front ends of the right and left support frames 10R, 10L fitted to the lower carrying body so as to be erected or lowered. A notch is provided at one end of the right and left blade 11R, 11L to engage with each other. A pin 14 is fixed to the right blade 11R and a long hole 15 is provided in the left blade 11L to connect them. The right blade 11R is connected to the right support frame 10R by hydraulic cylinder 16. When excavating the soil around the legs, the hydraulic cylinder 16 is shortened and the right and left blade 11R, 11L are bent inward and the bucket 6 is positioned close to the carrier body to work there. Since the blade 11 is grounded in front of the carrier body, it is stable at the front side and the excavating force is large.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swivel excavating machine, and more particularly to an earth dumping plate device mounted on a lower traveling body of a hydraulic excavating machine.

[0002]

2. Description of the Related Art In a conventional hydraulic excavating machine, as shown in FIG. 11, a supporting frame 51 having an earth discharging plate 50 is mounted on a lower traveling body 1 so as to be able to rise and fall. The hydraulic cylinder 2 is expanded and contracted so that the hydraulic cylinder 2 can be moved up and down. On the other hand, an excavation work machine including a boom 4, an arm 5, a bucket 6, and the like is attached to the upper-part turning body 3. The earth discharging plate 50 is used for earth discharging work, and is also used as an outrigger at the time of grounding to improve the stability in the front of the vehicle body (F direction).

[0003]

According to the conventional swivel excavating machine described above, as is apparent from FIG. 11, when an excavating operation is performed in front of the vehicle body (direction F), the earth-discharging plate 50 becomes an obstacle. There is a problem that the bucket 6 cannot be brought close to the vehicle body and the foot cannot be excavated. Therefore, when excavating at the feet, it is necessary to rotate the upper swing body 3 to the rear (R direction) of the vehicle body without the soil discharge plate 50. In this case,
Since the soil discharge plate 50 cannot be used as an outrigger, there is a problem that stability is lowered and sufficient excavation force cannot be obtained.

The present invention has been made in view of the above problems, and provides an earth excavating plate device for a swing excavating machine capable of excavating a foot while ensuring a sufficient excavating force and stability during excavation. It is an object.

[0005]

In order to achieve the above-mentioned object, in the earth excavating plate device of the swing excavating machine according to the present invention,
In a revolving excavating machine in which an excavating work machine is provided in an upper revolving structure, and earth excavating plates are installed on left and right support frames that are attached to a lower traveling body so as to be able to lie down At the same time, the left earth-discharging plate is attached to the left-side support frame, while the right-side earth-discharging plate is attached to the right-side support frame so as to be rotatable or slidable.

[0006]

With the above-described structure, the front and back surfaces of the left and right earth removing plates are used as flat plates during earth removing work, and the left and right earth removing plates are rotated or moved with respect to the respective support frames during foot excavation. It becomes possible to form a space at the central portion in front of the vehicle body by sliding it, and it becomes possible to excavate the foot up to the limit of the operator's visibility by bringing the bucket close to the vehicle body.
In addition, since the excavation plate is located forward and can be used as an outrigger during excavation at the feet, the forward stability is good and sufficient excavation force can be secured.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the earth discharging plate device for a swing excavating machine according to the present invention will be described below with reference to the drawings. The same parts as those in the conventional technology are designated by the same reference numerals.

FIG. 1 is a perspective view of an earth discharging plate apparatus showing a first embodiment, and FIG. 2 is a plan view. Left and right support frame 10
L and 10R are mounted on the lower traveling body 1 so as to be able to rise and fall, and the raising and lowering by the hydraulic cylinder 2 is the same as the conventional one, and therefore the description thereof is omitted. A left earth discharging plate 11L and a right earth discharging plate 11R are rotatably attached by pins 12 to the ends of the left and right support frames 10L and 10R, respectively. Left earth plate 11
A plurality of notches 13 are provided at one end of each of the L and the right earth discharging plate 11R, and they engage with each other and are connected by a pin 14. Pin 14 is the right earth plate 11R
The left earth discharging plate 11L is provided with a long hole 15 so that the left and right earth discharging plates 11L and 11R can be bent around the pin 14. The right soil plate 11R and the right support frame 10R are connected by a hydraulic cylinder 16.

At the time of earth removing work, left and right earth removing plates 11L, 11
As shown in FIG. 2, R extends the hydraulic cylinder 16 so that the front surface is a flat plate. In this case, the bucket 6 has an earth plate 11
You can only approach to the front position.

When excavating the feet, as shown in FIG. 3, the hydraulic cylinder 16 is shortened, and the left and right earth discharging plates 11L and 11R are bent inward. As a result, the bucket 6 can be brought closer to the solid line position on the inner side than the initial dotted line position, and the foot excavation can be performed. Further, at this time, the point A is a fulcrum in the forward direction, and therefore the forward stability is good and a large excavating force can be obtained.

FIG. 4 is a plan view showing a second embodiment of the earth discharging plate apparatus. Arms 22L and 22R fixed to the left and right earth discharging plates 21L and 21R are pinned at the tips of the left and right supporting frames 20L and 20R, respectively. It is rotatably attached by a shaft 23, and the vicinity of the pins 23 of the arms 22L and 22R and a bracket 24 connecting the left and right support frames 20L and 20R are connected by a hydraulic cylinder 25. Stepped portions 26L and 26R are provided at one end of the left and right soil discharging plates 21L and 21R so as to engage with each other.

At the time of earth unloading work, as shown in FIG. 4, the hydraulic cylinder 25 is shortened to engage the stepped portions 26L and 26R of the left and right earth unloading plates 21L and 21R to form a flat front surface. In this case, the bucket 6 can only approach the front position of the earth discharging plate 21.

At the time of excavating the feet, as shown in FIG. 5, the hydraulic cylinder 25 is extended and the left and right earth discharging plates 21L and 21R are rotated around the pin 23 to open left and right to form a space in the central portion. As a result, the bucket 6 can be brought closer to the solid line position on the inner side than the initial dotted line position, and the foot excavation can be performed. Further, at this time, the point B becomes a fulcrum in the forward direction, and therefore the forward stability is good and a large excavating force can be obtained.

FIG. 6 is a plan view showing a third embodiment of the earth discharging plate apparatus. Left and right earth discharging plates 31L and 31R are rotatably attached to the ends of the left and right support frames 30L and 30R by a pin 32. Has been done. The left and right soil discharge plates 31L and 31R and the left and right support frames 30L and 30R are hydraulic cylinders 33.
Are linked by Stepped portions 34L and 34R are provided at one ends of the left and right earth discharging plates 31L and 31R so as to engage with each other.

During earth unloading work, as shown in FIG. 6, the hydraulic cylinder 33 is shortened to engage the stepped portions 34L and 34R of the left and right earth unloading plates 31L and 31R so that the front surface is flat. In this case, the bucket 6 can only approach the position in front of the earth discharging plate 31.

At the time of excavating the feet, as shown in FIG. 7, the hydraulic cylinder 33 is extended and the left and right earth discharging plates 31L and 31R are rotated about the pin 32 to open them to the left and right to form a space in the central portion. As a result, the bucket 6 can be brought closer to the solid line position on the inner side than the initial dotted line position, and the foot excavation can be performed. Further, at this time, point C is a fulcrum in the forward direction, and therefore the forward stability is good and a large excavating force can be obtained.

FIG. 8 is a perspective view showing a fourth embodiment of the earth discharging plate device, and FIG. 9 is a plan view. Left and right support frames 4
A plurality of rollers 41 are rotatably attached to the ends of 0L and 40R, respectively. Left and right dump plates 42L, 42R
Rails 43L and 43R are fixed to the lower part of the back surface of the support frame 40L and 40R by engaging the rollers 41.
Left and right soil discharging plates 42L and 42R are attached to the front ends of the slats so as to be slidable in the lateral direction. Left and right support frame 40L,
Brackets 44L and 44R provided on 40R and left and right earth discharging plates 42L and 42R are connected by a hydraulic cylinder 45. Stepped portions 46L and 46R are provided at one ends of the left and right soil discharging plates 42L and 42R so as to engage with each other.

During earth unloading work, as shown in FIG. 9, the hydraulic cylinder 45 is shortened, the left and right earth unloading plates 42L and 42R are brought close to each other, and the stepped portions 46L and 46R are engaged with each other to form a flat front surface. . In this case, the bucket 6 can only approach the front position of the soil discharging plate 42.

At the time of excavation of the feet, as shown in FIG. 10, the hydraulic cylinder 45 is extended and the left and right soil discharging plates 42L and 42R are slid in the left and right direction to form a space in the central portion. As a result, the bucket 6 can be approached from the position of the initial dotted line to the position of the solid line, and the foot excavation can be performed. At this time, the DD line serves as a fulcrum in the forward direction, and therefore the forward stability is good and a large excavating force can be obtained.

[0020]

Since the present invention is constructed as described above, the front and back of the left and right soil discharging plates are used as flat plates for earth discharging, and the left and right soil discharging plates are rotated or slid during foot excavation. By doing so, a space can be formed in the central portion, and the bucket can be brought close to the vehicle body. Therefore, it is possible to excavate the foot up to the limit of the operator's visibility. Further, since the fulcrum position in the front direction is on the front side, the stability of the front side is good, and the earth discharging plate device of the turning type excavating machine capable of obtaining a sufficient excavating force can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a first embodiment of an earth discharging plate device of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a plan view showing the shape of an earth discharging plate when excavating a foot.

FIG. 4 is a plan view of a second embodiment of the earth discharging plate device of the present invention.

FIG. 5 is a plan view showing the shape of an earth discharging plate when excavating a foot.

FIG. 6 is a plan view of a third embodiment of the earth discharging plate device of the present invention.

FIG. 7 is a plan view showing the shape of an earth discharging plate when excavating a foot.

FIG. 8 is a perspective view of a fourth embodiment of the earth discharging plate device of the present invention.

FIG. 9 is a plan view of the same.

FIG. 10 is a plan view showing the shape of an earth discharging plate when excavating a foot.

FIG. 11 is an overall perspective view of a hydraulic excavator equipped with a conventional earth removing plate device.

[Explanation of symbols]

 1 ... Lower traveling body 2 ... Hydraulic cylinder 3 ... Upper swinging body 10L, 20L, 30L, 40L ... Left supporting frame 10R, 20R, 30R, 40R ... Right supporting frame 11L, 21L, 31L, 42L. Left earth discharging plate 11R, 21R, 31R, 42R ... right earth discharging plate 12, 14, 23, 32 ... pin 15 ... elongated hole 16, 25, 33, 45 ... hydraulic cylinder 41 ... roller 43L, 43R ‥‥rail

Claims (1)

[Claims] 1. A revolving excavating machine comprising an excavating work machine provided on an upper revolving structure, and earth-discharging plates installed on left and right support frames mounted on a lower traveling structure so as to be able to rise and descend.
The earth removal plate is divided into left and right, and the left earth removal plate is attached to the left support frame while the right earth removal plate is attached to the right support frame so as to be rotatable or slidable. A soil excavation plate device for a swivel excavating machine.