JPS58135232A - Excavator - Google Patents

Abstract

PURPOSE:To alter excavation places while keeping the upper turning body of an excavator at the same attitude by a method in which a boom is divided into two sections on the way in such a way as to enable the tip side to be displaced to left and right sides. CONSTITUTION:A boom attached in a vertically movable manner to an upper turnable body is divided into an end side boom 3a and a tip side boom 3b and an insert boom 14 is interposed at the divided portion. Also, an operation cylinder 18 is interposed between the bottom 14 and the booms 3a and 3b and a parallel link 19 is provided between the divided booms, whereby enabling the tip side of the boom 14 to be displaced to both left and right sides. For example, when excavation place is changed to the right side, the cylinder 18 is extended, the boom 14 is turned clockwise, and thereby the tip side boom 3b is altered to the right side. Since the boom 14 and the parallel link 19 make a parallelogammic movement, even when the boom 14 turns to a place as shown by two-dot chain line, the tip side boom 3b can be altered to the right side while keeping it at the same direction attitude.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an excavator consisting of an upper revolving body with a boom and a packet that can be tilted, and a lower traveling body such as a crawler. This invention relates to an excavator that can change its excavation posture.

Generally, an excavator has a lower running body (1) as shown in Fig. 1.
A boom' (3) is attached to the upper revolving body (2) which is rotatably placed on top of the upper rotating body (2), and an arm (4) is attached to the tip of this boom (3) so as to be able to raise and lower. Furthermore, a packet (5) is rotatably attached to the tip of this arm (4), and the boom (3) is undulated by a cylinder (6), and the arm (4) is undulated by a cylinder (by force, the packet is further (5) can be rotated by cylinders (8).

However, with a small excavator, even when excavating in a narrow place, such as an alley, it is possible to change the excavation location to the width direction of the alley as long as the upper revolving body (2) can be rotated. However, when using a large excavator in a place where it cannot be turned, the excavation location by the packet (5) is limited, and the actual excavation location cannot be changed in the left-right direction. For this reason, large excavators can only be used to excavate along the extension line of the boom in narrow spaces, limiting the range of applications.

The present invention makes it possible for a large excavator to bend the middle of the boom in the left-right direction, thereby changing the position of the packet in the left-right direction. The excavation location can be changed, and the present invention will be described below with reference to the attached drawings.

2 and 3 show the structure of an excavator boom, which is a feature of the present invention.

The boom (3) is divided into two in the longitudinal direction, and the distal boom body (
3α) and the distal side of the distal boom body (3b),
Connecting members (9) and (00) are projected and integrally attached, and brackets (12) are protruded from both left and right sides of both boom bodies (3a) and (3z) and at the upper position, In addition, cylinder mounting brackets (brackets) (for cylinder mounting) are installed on both left and right sides of the distal end side boom body (3a) and at the bottom position.
131 is provided protrudingly. Both boom bodies (3a) and (3b)
) is interposed between the pin Q
6) They are connected rotatably in the left and right directions at (+7), and on one side of the insert boom 0a, a cylinder α~ is arranged and interposed between the brackets a3) and 09, and the insert boom - On the other side of the frame α, a parallel link (II) is placed between brackets 01 and (12), and the parallel link a9 and insert boom (14) can move in a parallelogram. do it like this.

In addition, the above insert boom 04J mounting pin Q6)
(17) is inserted vertically when the insert boom αa is in a horizontal state, so it is designed to have a large diameter in the middle to prevent it from falling.

(201 is a pin hole for attaching to the upper rotating body (2), Qυ is a pin provided to connect the rod tip of the boom hoisting cylinder (6), (2 is a pin hole for attaching to the upper revolving body (2),
), and (2) is a bracket for mounting the arm raising/lowering cylinder (7).

With the above configuration, during normal work or when storing packets, the boom (3
).

If it is desired to shift the excavation location to either the left or right direction, cylinder group 0 is extended. In the illustrated embodiment, the cylinder θ (to) is located on the left side of the insert boom l, θa, so when the cylinder (1 mark) is extended, the bracket (+51 is fi) and the insert boom (+4) is
is rotated clockwise in the figure about pin 06) as a fulcrum, and the tip side boom body (3h) is also displaced to the right. However, since the insert boom 04) and the parallel link αl move in a parallelogram, the insert boom α(a)
Even when the boom body (3b) rotates to the position shown by the two-dot chain line, the distal end side boom body (3b) is displaced to the right while maintaining the attitude in the same direction.

At this time, since the cylinder QIIO is located at the bottom of the insert boom 04) and the parallel link 0 is located at a part of the insert boom 04), they will interfere with each other when the insert boom circle rotates. There isn't. By arbitrarily changing the rotation angle of the insert boom 04), the amount of displacement of the tip side boom body (3b) can be adjusted, and thereby the excavation work location can be selected.

When returning the distal end boom body (3b), it can be easily returned by shortening the cylinder 18).

Next, if you want to change the excavation work location to the left side, use cylinder a.
8 is further shortened than in the above-mentioned return operation, the distal end side boom body (3h) can be easily displaced to the left.

The above is an embodiment of the present invention, and the present invention is not limited thereto. For example, if a fluid pressure cylinder is adopted in place of the parallel link a, the packet can be rotated by the expansion and contraction operation of the fluid pressure cylinder. Of course, other changes and implementations may be made without departing from the gist of the invention.

As described above, according to the excavator of the present invention, the boom, which was conventionally made into one, is divided into two in the middle, and the tip side can be displaced to the left and right, so that the upper rotating body does not rotate. The excavator can be moved to the left or right at will, allowing the excavator to be used effectively even in narrow spaces where the upper revolving body cannot be rotated, or when using a large excavator, increasing work efficiency. It can be effective.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an excavator, FIG. 2 is a side view of a boom in the excavator of the present invention, and FIG. 3 is a plan view of FIG. 2. (1)...Lower traveling body, (2)...Upper rotating body, (
3)...Boom, (3α)...Distal boom body, (
3h)... Tip side boom body, (4)... Arm, (
5) Packet, (9) CIO) Connecting member,
(14)...insert boom, (16)fi7)・
...Pin, 08)...Cylinder, Ql...Parallel link. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd. Patent applicant
Ishikawajima Construction Machinery Co., Ltd. 1

Claims (1)

[Claims] I) The boom attached to the upper revolving structure so as to be undulating is divided in the middle in the longitudinal direction, and an insert boom is interposed in the divided part, so that the insert boom and the divided boom body are arranged in a direction perpendicular to the undulating direction. an operating cylinder is interposed between the insert boom and the boom body, and a member is interposed between the divided boom bodies to restrict movement due to the operation of the cylinder. An excavator characterized by having a boom.