JPH07305374A - Device for installing working attachment - Google Patents

Abstract

PURPOSE:To enable a working attachment to be easily installed and removed and to be kept stably installed. CONSTITUTION:A first 5 and second 6 connecting members are connected together in an X-shape using a connecting pin 4. The end of the first connecting member 5 is attached to the end of an arm main body 2 using an attaching pin 7. The end of the second connecting member 6 is coupled to the end of an operating link 8 using a coupling link 9. When recessed locking portions 14, 15 at the ends of the respective connecting members 5, 6 are locked to the respective lock pins 16, 17 of a working attachment 3, a first upper locking hole 20 coincides with a second lower locking hole 21 and then a knock bolt is inserted into the holes 20, 21 to secure both connecting members 5, 6 together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work attachment mounting device for mounting a work attachment such as an excavating bucket to the tip of an arm body of an earthmoving machine, and particularly, the work attachment can be easily attached and detached and the work attachment can be attached. The present invention relates to a work attachment mounting device that can stabilize the state.

[0002]

2. Description of the Related Art Conventionally, when attaching a work attachment such as an excavation bucket to the tip of the earth body of an earthmoving machine, a work attachment attachment device is attached to the tip of the arm body, and the work attachment is attached to or detached from the attachment device. It is common practice to install as much as possible.

[0003]

By the way, since the conventional work attachment mounting device has a structure in which members are combined in a V shape, it is easy to attach and detach the work attachment, but it is not possible to attach the work attachment to the arm body of the earthworking machine. When the work attachment is driven by transmitting the movement of the pivotally linked operation link, a force acts in the direction of closing the V shape on the members that are combined in the V shape, and the work attachment attachment state is stable. There is a problem not to do.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a work attachment mounting device in which the work attachment can be easily attached and detached and the mounting state of the work attachment can be stabilized.

Another object of the present invention is to provide a work attachment mounting device which can be mounted without any trouble even if the distance between two locking pins provided on the work attachment is changed. .

[0006]

In order to achieve the above object, the invention according to claim 1 of the present invention is provided between an end of an arm body of an earthworking machine and a work attachment, and is provided in an arm body of the earthworking machine. In a work attachment mounting device for transmitting the movement of an operation link pivotally attached to a work attachment to drive the work attachment, a base end portion is attached to a tip end portion of the arm body via a mounting pin and is provided at a tip end portion. A first connecting member in which the first concave locking portion is locked to a first locking pin of the work attachment; a base end portion is connected to the operation link via an interlocking link, and is provided on the distal end portion. A second concave locking portion that is locked to the second locking pin of the work attachment, and an intermediate portion is pivotally attached to the intermediate portion of the first connecting member via the connecting pin. In a state in which the respective recessed retaining portion is engaged to the engaging pin, and a fixing means for fixedly connecting said two joining members to each other; connecting member and characterized in that the so provided, respectively.

The invention according to claim 2 of the present invention is characterized in that both connecting members can be connected and fixed to each other by a fixing means in accordance with a dimension between both locking pins.

[0008]

In the invention according to claim 1 of the present invention, the first
The connecting member and the second connecting member are combined in an X shape via the connecting pin, and the recessed locking portions provided at the tip of each of the connecting members are locked to the locking pins of the work attachment. It Therefore, when transmitting the movement of the actuating link pivotally attached to the arm body to the work attachment to drive the work attachment, a force that widens the space between the both concave locking portions is applied to both connecting members. This makes it possible to stabilize the attachment state of the work attachment. Moreover, the work attachment can be easily attached and detached as in the conventional case.

Further, in the invention according to claim 2 of the present invention, both connecting members can be connected and fixed to each other by the fixing means in accordance with the dimension between the two locking pins.
Therefore, even if the dimension between both locking pins is changed due to the type of work attachment or the difference in manufacturer, etc.
It can be installed without any trouble.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 and 2 show a work attachment mounting apparatus according to a first embodiment of the present invention. The mounting apparatus 1 is an arm connected to a boom (not shown) of an earthmoving machine such as a power shovel. It is provided between the main body 2 and a work attachment 3 such as an excavation bucket.

As shown in FIGS. 1 and 2, the mounting device 1 has its central portion pivotally connected to each other via a connecting pin 4 and X-shaped.
It is provided with a first connecting member 5 and a second connecting member 6 which are combined in a shape, and a base end portion of the first connecting member 5 is pivotally attached to a distal end portion of the arm body 2 via a mounting pin 7. , Second again
A base end portion of the connecting member 6 is connected to an operation link 8 pivotally attached to the arm body 2 via an interlocking link 9.

That is, as shown in FIGS. 1 and 2, the base end portion of the actuating link 8 is pivotally attached to a portion from the tip of the arm body 2 to the base end side thereof, as shown in FIGS. ,
The distal end of the operating link 8 has a second end through a pin 11.
The other end of the interlocking link 9 pivotally attached to the base end of the connecting member 6,
It is connected via an interlocking pin 12, and a hydraulic cylinder 13 for driving the work attachment 3 is also connected to the position of the interlocking pin 12.

On the other hand, as shown in FIGS. 1 and 2, a first concave locking portion 14 and a second concave locking portion 15 that open toward the outside are provided at the tips of the connecting members 5 and 6. They are provided respectively, and these concave locking portions 14 and 15 are provided.
Are engaged with the first engagement pin 16 and the second engagement pin 17 provided on the work attachment 3 from the inside.

Further, as shown in FIGS. 1 and 2, the concave locking portions 1 are provided at appropriate positions of the connecting members 5 and 6.
The first upper fixing hole 18, the second upper fixing hole 19, the first lower fixing hole 20, and the second lower fixing hole 21 which are aligned with each other in a state where the locking pins 4 and 15 are locked to the locking pins 16 and 17, respectively. The upper knock bolt 22 and the lower knock bolt 23 are respectively inserted into the upper fixing holes 18 and 19 and the lower fixing holes 20 and 21. As a result, both the connecting members 5 and 6 are connected and fixed to each other with the work attachment 3 attached.

Next, the operation of this embodiment will be described.
When attaching the work attachment 3, first, the knock bolts 22 and 23 are removed so that the connecting members 5 and 6 can be moved independently of each other.

When the hydraulic cylinder 13 is contracted in this state, the connecting members 5 and 6 are locked into the concave concave members 14 and 1.
5 operates so as to reduce the distance between the locking pins 5, and the distance eventually becomes equal to or smaller than the dimension between the locking pins 16 and 17. FIG. 1 shows this state.

In this state, the hydraulic cylinder 1
3 is temporarily stopped and, for example, only the second concave locking portion 15 is locked to the second locking pin 17. Then, in this state, the hydraulic cylinder 13 is extended. Then, both connecting members 5, 6
Operates in a direction to widen the space between the both concave locking portions 14 and 15, and the first concave locking portion 14 eventually becomes the first locking pin 16
Locked in. FIG. 2 shows this state.

By the way, in this state, both upper fixing holes 1
Since the 8 and 19 and the both lower fixing holes 20 and 21 are in a state of being matched with each other, the knock bolts 22 and 23 are respectively inserted and the connecting members 5 and 6 are connected and fixed to each other.

When the work attachment 3 is to be removed, the same work is performed in the reverse order of the above-mentioned attachment work.

By attaching and detaching the knock bolts 22 and 23 and expanding and contracting the hydraulic cylinder 13, the work attachment 3 can be attached and detached very easily, and the two knock bolts 22 and 23 connect the connecting members 5 and 6. Since it is fixed, safety can be improved.
Moreover, in the mounting device 1 according to the present embodiment, even if both of the two knock bolts 22 and 23 are damaged at the time of overload, the work attachment 3 is structurally prevented from falling off, so that the safety is extremely high. Sex is obtained.

That is, there is a possibility that the mounting device 1 is overloaded when the hydraulic cylinder 13 is extended and the downward working attachment 3 is swung upward. If the work attachment 3 falls off at this time, the arm body 2 may be damaged or the earthworking machine may overturn, which is extremely dangerous.

However, in the case of the present embodiment, even if the two knock bolts 22 and 23 are damaged during the extension operation of the hydraulic cylinder 13, the biconcave locking portion 1 is formed on the connecting members 5 and 6.
Since a force for expanding the interval between No. 4 and 15 acts, there is no possibility that the work attachment 3 will fall off, and high safety can be obtained.

By the way, the dimension between the locking pins 16 and 17 of the work attachment 3 may be slightly different if the manufacturers are different, and even if they are the same manufacturer, they may be slightly different depending on the type and the year of manufacture. May be different.

FIG. 3 shows a second embodiment of the present invention adapted to cope with such a case as well, in which a plurality of fixing holes are provided and the positions thereof are different from each other.

That is, as shown in FIG. 3, the first connecting member 5 is provided with two first upper fixing holes 28a and 28b and two first lower fixing holes 30a and 30b. In addition, the second connecting member 6 has two second upper fixing holes 29a, 29a.
b and two second lower fixing holes 31a and 31b are provided. The positions of these are different from each other, and are matched at different timings.

For example, when the distance between the biconcave locking portions 14 and 15 (see FIG. 1) is the dimension A, the first upper fixing hole 28 is formed.
b and the second upper fixing hole 29b only match, and in the case of the dimension B, only the first lower fixing hole 30a and the second lower fixing hole 31b match, and in the case of the dimension C, the first upper fixing hole 30b. Fixing hole 28b
And the second upper fixing hole 29b only match, so that they match at different timings. The connecting members 5 and 6 are connected and fixed to each other by a single knock bolt (not shown) that is inserted into the matching fixing holes. In other respects, the structure is the same as that of the first embodiment and the operation is the same.

In the case of this embodiment, however, the connecting and fixing positions of the connecting members 5 and 6 are set in a plurality of stages in accordance with the size between the engaging pins 16 and 17 (see FIG. 1) of the work attachment 3. Since various types of work attachments 3 can be attached, various work attachments 3 can be attached.

In the case of the second embodiment, the case where both the connecting members 5 and 6 are connected and fixed by one knock bolt has been described, but the upper fixing holes 28a, 28b and 29 are provided.
a, 29b and lower fixing holes 30a, 30b, 31a,
By aligning the position with 31b, two knock bolts can be used, and the connecting and fixing positions of both connecting members 5 and 6 can be changed in multiple stages.

[0029]

As described above, according to the first aspect of the present invention.
In the invention according to (1), the first connecting member and the second connecting member are combined in an X shape, and the concave locking portions at the tips of these connecting members are locked to the respective locking pins of the work attachment. Therefore, it is possible to easily attach and detach the work attachment, stabilize the attachment state of the work attachment, and significantly improve the work safety.

In the invention according to claim 2 of the present invention, the two connecting members can be connected and fixed to each other by the fixing means in accordance with the dimension between the two locking pins of the work attachment. Even work attachments having different sizes between the locking pins can be attached without any trouble.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a state of a work attachment mounting apparatus according to a first embodiment of the present invention when a work attachment is mounted.

FIG. 2 is a view corresponding to FIG. 1 showing a state after completion of attachment of a work attachment.

FIG. 3 is a main part configuration diagram showing a work attachment mounting device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Mounting Device 2 Arm Main Body 3 Work Attachment 4 Connecting Pin 5 First Connecting Member 6 Second Connecting Member 7 Mounting Pin 8 Operating Link 9 Interlocking Link 10 Pivoting Pin 11 Pin 12 Interlocking Pin 13 Hydraulic Cylinder 14 First Recessed Locking Part 15 2nd concave locking part 16 1st locking pin 17 2nd locking pin 18, 28a, 28b 1st upper fixing hole 19, 29a, 29b 2nd upper fixing hole 20, 30a, 30b 1st lower fixing hole 21 , 31am31b Second lower fixing hole 22 Upper knock bolt 23 Lower knock bolt

Claims (2)

[Claims] 1. A work attachment for driving the work attachment by transmitting a movement of an operation link pivotally attached to the arm body of the earthworking machine to the work attachment, the work attachment being provided between the tip of the arm body of the earthworking machine and the work attachment. In the attachment device, a base end portion is attached to the arm body tip end portion through an attachment pin, and a first concave locking portion provided at the tip end portion is locked to the first attachment pin of the work attachment. A first connecting member; a base end portion of which is connected to the operation link via an interlocking link,
A second concave locking portion provided on the tip end is locked to a second locking pin of the work attachment, and an intermediate portion is pivotally attached to an intermediate portion of the first connecting member via the connecting pin. Two
A work attachment mounting device comprising: a connecting member; and a fixing means for connecting and fixing the connecting members to each other in a state in which the concave locking portions are locked to the locking pins. 2. The work attachment mounting device according to claim 1, wherein the fixing means is capable of connecting and fixing the connecting members to each other in accordance with the dimension between the locking pins.