JP2563574Y2 - Side digging attachment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a side excavation attachment mounted on a hydraulic excavator for side excavation.

[0002]

2. Description of the Related Art FIG. 3 is a side view of a main part of a conventional side digging attachment 1. As shown in FIG. In the figure, 2 is a rear boom of the side digging attachment 1, 3 is a front boom,
4 is a link, 5 is an upper boom, 6 is an arm, 7 is a bucket, 8 is a rear vertical pin, 9 is a front vertical pin, and 10 and 1
1 is a link pin, 12 is a boom cylinder, 13
Is an offset cylinder, 14 is an arm cylinder, and 15 is a bucket cylinder. FIG. 4 is a main part plan view showing the side digging attachment 1. In the drawing, reference numeral 16 denotes a vehicle body of a hydraulic shovel, 17 denotes a vertical pin hole for attaching a front boom at the front end of a rear boom (2), and 18 denotes an upper boom 5
A, b, c, and d are the axes of the pins 11, 10, 9, and 8 respectively, 0-0 is the center line of the rear boom 2 in the front-rear direction, and W is the width of the bucket 7. The dimension, I, is the minimum required distance between the front boom 3 and the link 4.

Next, a prior art side digging attachment 1 will be described with reference to FIGS. The rear boom 2 is attached to the front part of the body 16 of the hydraulic excavator, and the front boom 3 and the link 4 are connected to the front end of the rear boom (2) in a parallel and rotatable manner in the left and right direction. An upper boom 5 is connected to the front part, an arm 6 and a bucket 7 are sequentially connected to the upper boom 5 so as to be rotatable in the front-rear direction, respectively, and an offset cylinder 13 is provided between the front boom 3 and the link 4 in a diagonal manner. The arm 6 can be offset-moved by adjusting the offset cylinder 13. As shown in FIG. 4, the distance ab from the axis a to the axis b is ab = L1, the distance cd from the axis c to d.
Is cd = L1, and the distance ac from the axis a to c is ac = L
2. The distance bd from the axis b to d is bd = L2.
Accordingly, a parallel link is formed in which the quadrilateral connecting the axes cd-ba-a-c becomes a parallelogram, and the arm 6 is offset-moved in parallel to the center line 0-0 to dig the side. It can be performed.

[0004]

In the excavator for side excavation, the capacity of the bucket to be mounted is limited due to the problem of the excavating ability of the excavator and the balance of the vehicle body during excavation. In the conventional side digging attachment 1 shown in FIG. 4, a bucket 7 having a width dimension w is attached. When the side digging attachment 1 is not offset, the front-rear center line of the arm 6, that is, the front-rear center line of the bucket 7 coincides with the front-rear center line 0-0 of the rear boom 2. Is located at a position on the inner side of the outer end face B of the link 4 by a dimension l. Therefore, when deep excavation is performed in the above state, the outer portion of the front part of the link 4 collides with the soil, and this hinders deep excavation. The purpose of the present invention is to solve the above problems.

[0005]

In the side digging attachment of the present invention, the center of the front boom mounting pin hole at the front end of the rear boom is opposite to the link arrangement position from the center line in the front-rear direction of the rear boom. Side of the upper boom, and the center of the vertical pin hole for mounting the front boom is eccentric from the center line in the front-rear direction of the upper boom to the side opposite to the position where the link is installed. When performing deep excavation without adjustment, the position of the outer end face in the front-rear direction of the link is located inside the front-rear position of the side plate of the bucket.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view of a main part of the side digging attachment 19 of the present invention. In the figure, the same reference numerals are given to components using the same components as the conventional technology. 20
Is the rear boom, 21 is the upper boom, a ', b',
c ′ and d ′ are the axes of the pins 11, 10, 9 and 8 in the side digging attachment 19 of the present invention. FIG. 2 shows that the side digging attachment 19 is maximally offset rightward (the center line 0-0 in the front-rear direction of the rear boom 20).
FIG. 9 is a plan view of a main part showing a state where the maximum offset amount from the distance is WR). In the figure, PP is the center line of the upper boom 21 in the front-rear direction.

Next, the side digging attachment 1 of the present invention.
9 will be described with reference to FIGS. Rear boom (20) Vertical pin hole 1 for mounting the front boom at the tip
The hole 7 '(same as the axis d') is eccentric by a required dimension S from the front-rear center line 0-0 of the rear boom 20 on the side opposite to the position where the link 4 is provided. Also upper boom 2
The center of the front boom mounting pin hole 18 '(the same as the axis c') is the center line P of the upper boom 21 in the front-rear direction.
-P is formed eccentrically by the dimension S 'on the side opposite to the position where the link 4 is disposed. Note that the distance between the front boom 3 and the link 4 is set to the necessary minimum distance dimension I as in the case of the related art.

Next, the side digging attachment 1 of the present invention.
The operation of No. 9 will be described. In the side digging attachment 19 of the present invention, the front boom mounting pin holes 1 of the rear boom (20) tip and the upper boom 21 are respectively provided.
The holes 7 ′ and 18 ′ are formed so as to be eccentric by a dimension S on the side opposite to the position where the link 4 is provided. Thus, the front boom 3 can be eccentrically arranged by the dimension S at the opposite side from the center line 0-0 in the front-rear direction of the rear boom 20, and the link 4 can be shifted toward the center line 0-0, that is, the inside by the dimension S. '(This dimension S' may be selected from a range extending from dimension zero to dimension S). As shown in FIG. 1, the outer side surface A of the side plate of the bucket 7 is located outside the outer end surface B of the link 4 by a distance m. Therefore, when deep excavation is performed without performing offset adjustment in this state, the portion outside the front part of the link (4) does not collide with the soil. The offset amount of the side digging attachment 19 is set to 0 (zero),
Deep excavation can be performed without hindrance.

[0009]

[Effects of the Invention] In a hydraulic excavator for side excavation, there are restrictions on the capacity and width of a bucket to be mounted. When the offset operation is not performed in the conventional side digging attachment, the outer side surface of the side plate of the bucket is located inside the outer end surface of the link. Therefore, when deep excavation is performed in the above-described state, the outer portion of the front portion of the link collides with the soil, and this hinders deep excavation. However, in the side digging attachment of the present invention, the center of the front boom mounting pin hole at the end of the rear boom is offset from the center line in the front-rear direction of the rear boom by the required dimension on the side opposite to the link arrangement position. In addition, the center of the vertical pin hole for mounting the front boom of the upper boom is formed to be eccentric from the center line in the front-rear direction of the upper boom to the side opposite to the link arrangement position. As a result, the front boom can be eccentrically arranged by a required dimension on the side opposite to the link arrangement position from the center line in the front-rear direction of the rear boom. At the same time, the link can be retracted by the above-mentioned size, toward the center line, that is, toward the inside. In this way, the outer side surface of the side plate of the bucket is positioned outside the outer end surface of the link,
Even if deep excavation is performed without performing offset adjustment in this state, the outer portion of the front portion of the link does not collide with the soil. By setting the offset amount of the side digging attachment of the present invention to 0 (zero), deep digging can be performed without any trouble. In addition, the side digging attachment of the present invention has the front boom and the link eccentrically arranged on the opposite side of the link arrangement position compared to the conventional technology, so that the left and right weight of the side digging attachment that is not offset is provided. I was able to improve my balance.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part of a side digging attachment of the present invention.

FIG. 2 is a plan view of a main part showing a state where a side excavation attachment in FIG. 1 is maximally offset rightward.

FIG. 3 is a side view of a main part of a conventional side digging attachment.

FIG. 4 is a plan view showing a main part of a conventional side digging attachment.

[Explanation of symbols]

1,19 Side digging attachment 2,20 Rear boom 3 Front boom 4 Link 5,21 Upper boom 6 Arm 7 Bucket 8 Rear vertical pin 9 Front vertical pin 10,11 Link pin 13 Offset cylinder 17,17 ', 18, 18 'vertical pin hole for front boom mounting

Claims (1)

(57) [Scope of request for utility model registration] 1. A rear boom is attached to a front portion of a vehicle body, a front boom and a link are connected to a front end portion of the rear boom so as to be rotatable in a horizontal direction, and an upper boom is connected to a front portion of the front boom and the link. , An arm and a bucket are sequentially connected to the upper boom so as to be rotatable in the front-rear direction, and an offset cylinder is interposed diagonally between the front boom and the link to adjust the offset cylinder. Side digging attachment that allows the arm to be offset by moving the center of the front boom mounting pin hole at the end of the rear boom from the center line in the front-rear direction of the rear boom on the side opposite to the link arrangement position Eccentrically to the required dimensions, and also align the center of the vertical pin holes for mounting the front boom of the upper boom. It is formed eccentrically from the center line in the front-rear direction of the boom and opposite to the position where the link is installed.
A side digging attachment characterized in that when performing deep digging without performing arm offset adjustment, the position of the outer end face in the front-rear direction of the link is located inside the front-rear position of the side plate of the bucket, and the side digging attachment is characterized in that .