JPH10140854A - Structure for mounting attachment on arm for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily exchange an attachment. SOLUTION: The first connection 17, the second connection 18 and the third connection 19 are provided at the end of the arm 1 of a mobile vehicle, at a bracket 16 mounted on the inside face of the arm 1 in a demountable manner and at one end of a rod 14, the other end of which is connected to the link 13 oscillated by a hydraulic cylinder 12, respectively. An attachment is connected to the connections 17, 18, 19 in a disconnectable manner. If the second connection 18 is not used, the bracket 16 is removed from the arm 1 to prevent the interference of the bracket 16 with the attachment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for attaching an attachment to an arm in a construction machine used for excavating soil or crushing a building.

[0002]

2. Description of the Related Art Conventionally, a self-propelled vehicle is provided with a swingable arm as a construction machine for excavating soil and crushing a building. Attachment such as a bucket or a breaker that operates via a connector is used so as to be exchangeable depending on the application.

[0003] The structure for attaching the attachment to the arm is such that the link and the rod are separated from the arm and the attachment when the attachment is exchanged.

[0004]

However, the above-described mounting structure has a problem that it takes time to replace the attachment.

Accordingly, an object of the present invention is to make it possible to easily replace an attachment.

[0006]

In order to solve the above-mentioned problems, the present invention provides a first connecting portion for supporting an attachment at a tip end of a swingable arm mounted on a self-propelled vehicle, A bracket having a second connecting portion supporting the attachment together with the first connecting portion is detachably attached to an inner surface of the arm, and the other end of a link that is connected to the arm at one end and swings by a hydraulic cylinder. The other end of the rod is rotatably connected to the third end of the rod, and the other end of the rod is provided with a third connecting portion for operating an attachment in accordance with the movement of the rod. The mounting structure was adopted.

In this mounting structure, when replacing an attachment, an unnecessary attachment is separated from each connecting portion,
It is only necessary to connect the attachment to be used to each connecting part, and it is not necessary to remove the link and the rod from the arm.

When the second connecting portion is not used,
When the bracket is removed from the arm, the bracket does not interfere with the attachment.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a state in which a breaker 2 is attached as an attachment to a swingable arm 1 mounted on a self-propelled vehicle, and FIG. 5 shows its disassembled state.

As shown in the figure, the breaker 2 has an upper pawl 3 having two pawls provided in a comb shape and a lower pawl 4 having three pawls provided in a comb shape. The lower claw 4 is rotatably connected to the plate 5. Connecting pieces 6 and 7 are provided at the base ends of the upper nail 3 and the lower nail 4, respectively, and the connecting pieces 6 and 7 are connected by an interlocking link 8. A first engagement hole 9 and a second engagement hole 10 are formed in the plate 5, and a third engagement hole 11 is formed in a protruding piece 3 a provided on the outer surface of the upper claw 3.

One end of a link 13 to which a hydraulic cylinder 12 is connected is connected to the arm 1.
One end of a rod 14 is rotatably connected to the other end of 3. A base 15 is attached to the inner side surface of the arm 1, and a bracket 16 is inserted into the base 15 so as to be freely inserted and removed.

A first connecting portion 17 is provided at the tip of the arm 1.
However, the second connecting portion 18 is attached to the bracket 16
A third connection portion 19 is formed at the other end of the first connection portion. Each connecting part 17, 18, 19 is a through hole,
Each connecting part 17, 18, 19 and each engaging hole 9, 10, 11
Are respectively inserted with pins 20, 21, and 22.

The breaker 2 is supported on the arm 1 by pins 20 and 21.
The power is transmitted to the upper pawl 3 via the rod 14 and the pin 22.
The movement of the upper claw 3 is transmitted to the lower claw 4 via the connecting pieces 6 and 7 and the interlocking link 8, and the upper claw 3 and the lower claw 4 simultaneously swing in opposite directions to pinch the held object.

As the attachment, the breaker 2
In addition, a bucket 23 as shown in FIG. 6 can be used.
The bucket 23 has a connecting piece 24 at the base end, and the connecting piece 24 has a first engaging hole 25 formed inside and a second engaging hole 26 formed outside.

To replace the breaker 2 attached to the arm 1 with the bucket 23 as described above, first,
The pins 20, 21, and 22 are pulled out from the connecting portions 17, 18, and 19, and the breaker 2 is removed from the arm 1.

The first connecting portion 17 and the first engagement hole 2
5, the pin 20 is inserted into the third connecting portion 19 and the second engaging hole 26, and the bucket 23 is attached to the arm 1. Since the second connecting portion 18 is not used, the bracket 16 is removed from the base 15. In this way, if the bracket 16 is detached, the bracket 16 does not interfere with the bucket 23 even if the bucket 23 swings.

At the time of the above replacement work, the link 13
It is not necessary to remove the rod 14 from the arm 1.

[0018]

As described above, in the mounting structure according to the present invention, when the attachment is replaced, it is only necessary to engage and disengage the attachment with each connecting portion.
There is no need to remove the link and rod from the arm. Therefore, the attachment can be easily replaced.

When the second connecting portion is not used,
By removing the bracket from the arm, interference of the bracket with the attachment can be prevented.

[Brief description of the drawings]

FIG. 1 is a side view showing a structure for attaching a breaker to an arm according to the present invention.

FIG. 2 is a bottom view of the above.

FIG. 3 is a sectional view taken along the line III-III of FIG. 1;

FIG. 4 is a perspective view of the same.

FIG. 5 is an exploded perspective view of the above.

FIG. 6 is a side view showing a structure for attaching a bucket to the arm of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arm 12 Hydraulic cylinder 13 Link 14 Rod 16 Bracket 17 First connection part 18 Second connection part 19 Third connection part

Claims (1)

[Claims] 1. A first connecting portion 17 for supporting an attachment is provided at a tip of a swingable arm 1 mounted on a self-propelled vehicle, and an attachment is provided on an inner surface of the arm 1 together with the first connecting portion. A bracket 16 having a second connecting portion 18 for supporting the arm 1 is detachably attached, and one end is
And one end of a rod 14 is rotatably connected to the other end of a link 13 which is oscillated by a hydraulic cylinder 12 and an attachment is actuated to the other end of the rod 14 as the rod 14 moves. A third connecting portion 19 to be provided,
A structure for attaching an attachment to an arm in a construction machine in which the attachment is detachable from each of the connecting portions 17, 18, and 19.