JPH07331688A - Work attachment of earthwork machine - Google Patents

Abstract

PURPOSE:To open and close a bucket member and a fork member and to operate the bucket member only even if the fork member is removed. CONSTITUTION:A bucket member 10 and a fork member 11 are connected by a connection pin 9. The bucket member 10 is mounted to an arm body 1 through a fixing pin 3. An operation link 5 and the bucket member 10 are connected by a drive link 12. One end of an association link 15 is mounted to the body 1 through an axially mounting pin 6 and the other end thereof is mounted to the fork member 11. When a hydraulic cylinder 2 is extended or retracted, the member 10 and the member 11 are opened or closed. Even if the member 11 and the link 15 are removed, the member 10 only can be operated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work attachment removably attached to the tip of an arm body of an earthworking machine, and in particular, the work of the earthworking machine in which the function of a fork grab can be easily added to the bucket function. Regarding attachment.

[0002]

2. Description of the Related Art Conventionally, as work attachments for earthmoving machines, excavation buckets driven by fluid pressure cylinders installed in earthmoving machines and base end portions thereof are pivotally attached to each other so that they can be opened and closed. Fork grabs and the like composed of a fork member and a lower fork member are known, and a fork glove in which a bucket member is used instead of the upper fork member is also known.

[0003]

All of the above-mentioned conventional work attachments for earthworking machines have a structure in which all the constituent members are organically combined to operate. Therefore, for example, some members are removed. Even if an attempt is made to construct a work attachment for another purpose using only the remaining components after the completion, there is a problem that it cannot be constructed as an attachment, or even if it is constructed as an attachment, a satisfactory operation cannot be obtained.

Therefore, conventionally, a method of exchanging the entire attachment for each application has been adopted, but the exchanging work is not easy and a large number of work attachments must be prepared in advance, such as storage, transportation and maintenance. However, there is a problem that it is not easy and the cost is high.

The present invention has been made in view of the present situation, and by removing a part of the members, a work attachment for other purposes can be easily constructed, and even if the work attachment is used upside down, It is an object of the present invention to provide a work attachment for an earthworking machine that can obtain a satisfactory operation.

Another object of the present invention is to provide a work attachment for an earthmoving machine which can be mounted with a fork member by making a slight modification to an existing bucket member.

Still another object of the present invention is to provide a work attachment for an earthworking machine in which the opening angle and direction of the upper and lower opening / closing members can be adjusted according to the purpose of use.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention comprises an upper opening / closing member and a lower opening / closing member whose base ends are pivotally attached to each other to open and close vertically. An attachment pin for attaching a position of the upper opening / closing member different from the pivotally attached portion to the distal end portion of the arm body; one end portion pivotally attached to the distal end portion of the operation link whose base end portion is pivotally attached to the arm main body, and the upper opening / closing member A drive link having the other end pivotally attached to a position above the mounting pin position; a base end of the drive link is pivotally attached to a pivotal attachment of the operation link to the arm body, and a tip end of the lower opening / closing member. An interlocking link pivotally mounted at a position different from a pivotally connecting part with the upper opening / closing member, and the tip end of the interlocking link is driven by a fluid pressure cylinder assembled to the earthworking machine, thereby providing both the opening / closing members. It is characterized in that it can be opened and closed.

According to the second aspect of the present invention, the upper opening / closing member is made up of a bucket member, and the lower opening / closing member is made up of a fork member that opens and closes at the opening of the bucket member. Is characterized by.

Further, according to a third aspect of the present invention, the position adjustment of at least one of the pivotally connecting portion with the upper opening / closing member of the drive link and the pivotally attaching portion with the lower opening / closing member of the interlocking link is performed. The feature is that it is possible.

According to a fourth aspect of the present invention, an upper opening / closing member and a lower opening / closing member whose base ends are pivotally attached to each other to open and close up and down; a position different from the pivoting portion of the lower opening / closing member. A mounting pin for mounting the end of the arm body to the arm body; a base end of which is pivotally mounted to the arm body, one end of which is pivotally mounted to the tip of the operation link, and the other end of which is located below the mounting pin of the lower opening / closing member A drive link to which a portion is pivotally attached; An interlocking link that is pivotally attached, and the opening and closing member can be opened and closed by driving the position near the tip of the operating link with a fluid pressure cylinder assembled to the earthworking machine. To do.

The invention according to claim 5 of the present invention is
It is characterized in that at least one of a pivotally connected portion with the lower opening / closing member of the drive link and / or a pivotally connected portion with the upper opening / closing member of the interlocking link is adjustable in position.

[0013]

In the invention according to claim 1 of the present invention, when the fluid pressure cylinder is expanded and contracted, this movement is transmitted to the upper opening / closing member via the drive link, and the upper opening / closing member uses the mounting pin position as a fulcrum. Swing up and down. When the upper opening / closing member swings up and down, this movement is transmitted to the lower opening / closing member via the pivotally connecting portions of both opening / closing members, and the lower opening / closing member swings up / down at the timing opposite to that of the upper opening / closing member. Therefore, both opening / closing members are driven to open / close.

By the way, the lower opening / closing member is pivotally attached to the upper opening / closing member via the pivotal attachment portion, and the interlocking link is pivotally attached to the pivotal attachment portion of the actuation link to the arm body. For this reason,
By removing the lower opening / closing member and the interlocking link from these pivotally mounted parts, it is possible to configure the attachment as only the upper opening / closing member, and there is no possibility that the operation of the upper opening / closing member becomes unnatural.

In the invention according to Claim 2 of the present invention, the upper opening / closing member is a bucket member, and the lower opening / closing member is a fork member. Since the structure of the upper opening / closing member, the operation link, and the drive link is basically the same as the structure of the excavation bucket, the existing excavation bucket is modified so that the fork member can be pivotally attached to form the bucket member. Moreover, the work attachment of the present invention can be configured by simply adding the fork member and the interlocking link.

In the invention according to claim 3 of the present invention, the position of at least one of the pivotally connecting portion with the upper opening / closing member of the drive link or the pivotally attaching portion with the lower opening / closing member of the interlocking link is , Can be adjusted. Therefore, it is possible to adjust the opening and closing angles and orientations of both opening and closing members according to the purpose of use, and for earthworking machines with different dimensions between the mounting pin and the pivotal attachment of the operating link to the arm body. Also, it is possible to install without any trouble.

Further, in the invention according to claim 4 of the present invention, the work attachment in the invention according to claim 1 is turned upside down, and the position near the tip of the interlocking link is driven by the fluid pressure cylinder. ing. Therefore, the same operation as the invention according to claim 1 is obtained.

Further, in the invention according to claim 5 of the present invention, the position of at least one of the pivotally connected portion with the lower opening / closing member of the drive link or the pivotally connected portion with the upper opening / closing member of the interlocking link is set. , Adjustable. Therefore, even with respect to the work attachment of the upside down type according to claim 4, the opening and closing angles and directions of both opening and closing members can be adjusted according to the purpose of use, and the attachment pin and the arm body of the operation link can be adjusted. It is possible to mount the earthmoving machine having a different size from the pivotally connecting part of the same without any trouble.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. 1 and 2 show a work attachment of an earthworking machine according to a first embodiment of the present invention. In the drawings, reference numeral 1 is connected to a boom (not shown) of the earthworking machine such as a power shovel. This is an arm main body, and the arm main body 1 is provided with a hydraulic cylinder 2 having one end connected to the base thereof.

As is well known, the arm body 1 has a mounting hole 4 for attaching various work attachments to the tip thereof in a detachable manner through mounting pins 3, and a genuine hole is provided behind the mounting hole 4. An operation link pivot hole 7 for pivotally attaching the lower end portion of the operation link 5 through the pivot pin 6 is provided. And a work attachment 8 which will be described later
Is attached to the tip of the arm body 1 via the pins 3 and 6, and is opened and closed by the expansion and contraction of the hydraulic cylinder 2.

As shown in FIGS. 1 and 2, the work attachment 8 is provided with a bucket member 10 and a fork member 11 whose base ends are pivotally attached to each other via a connecting pin 9 to open and close vertically. A position above the connecting pin 9 of the bucket member 10 is attached to the attaching hole 4 via the attaching pin 3, and the attaching pin 3 of the bucket member 10 is also attached.
One end of the drive link 12 is located at a position above the pin 13
Is installed through. And this drive link 1
The other end of 2 has a drive pin 14 at the tip of the operating link 5.
And the tip of the hydraulic cylinder 2 is also connected to this drive pin 14 position.

On the other hand, the connecting pin 9 of the fork member 11
As shown in FIGS. 1 and 2, one end of the interlocking link 15 is connected to a position lower than the interlocking pin 16 via the interlocking pin 16, and the other end of the interlocking link 15 is connected to the arm via the pivoting pin 6. It is attached to the main body 1.

Next, the operation of this embodiment will be described.
FIG. 1 shows the hydraulic cylinder 2 in a contracted state. In this state, the bucket member 10 and the fork member 11 are open vertically.

When the hydraulic cylinder 2 is extended from this state, this movement causes the movement link 5 and the drive link 1.
2 is transmitted to the bucket member 10 via 2, and the bucket member 10 starts to swing downward with the position of the mounting pin 3 as a fulcrum.

When the bucket member 10 swings downward, the position of the connecting pin 9 rotates counterclockwise in the figure with the position of the mounting pin 3 as a fulcrum, which causes the fork member 11 to move.
Starts swinging upward with the position of the connecting pin 9 as a fulcrum.
Finally, as shown in FIG. 2, the bucket member 1
0 and the fork member 11 are completely closed. That is, the work attachment 8 is opened and closed by the expansion and contraction operation of the hydraulic cylinder 2.

As shown in FIGS. 1 and 2, when it is necessary to use an excavation bucket during the operation using the work attachment 8, the work attachment 8 is conventionally removed and replaced with the excavation bucket. However, in the case of the present embodiment, it can be used as an excavation bucket by simply removing the fork member 11 and the interlocking link 15.

That is, at this time, first, the connecting pin 9 is removed, the fork member 11 is removed from the bucket member 10, and the interlocking link 15 is removed from the position of the pivot pin 6. As a result, only the bucket member 10, the operation link 5, and the drive link 12 are attached to the arm body 1, and this configuration is basically the same structure as the existing excavation bucket. Therefore, it can be used as an excavation bucket. In other words, the work attachment 8 according to the present embodiment has the connecting pin 9 attached to the existing excavation bucket.
The fork member 11 and the interlocking link 1 are modified so that the fork member 11 can be attached via the
It can be configured by simply adding 5.

By the expansion and contraction operation of the hydraulic cylinder 2, the bucket member 10 and the fork member 11 that opens and closes at the opening of the bucket member 10 can be operated in conjunction with each other. Further, the fork member 11 and the interlocking link 15 can be removed while the bucket member 10 is still attached to the arm body 1 to form an excavation bucket.

FIGS. 3 to 10 show a second embodiment of the present invention, in which the opening / closing angle and direction of the work attachment 8 are changed, or the dimension between the mounting pin 3 and the pivot pin 6 is changed. It is designed to be able to deal with any changes.

That is, as shown in FIGS. 3 to 10, the bucket member 10 has the drive link 1 through the pin 13.
In order to pivot the two, for example, two pin holes 20a, 20
b is provided, and the drive link 12 is adapted to be pivotally attached to the bucket member 10 via a pin 13 inserted into one of the pin holes 20a and 29b.

Further, as shown in FIGS. 3 to 10, the fork member 11 is provided with an interlocking link 1 via an interlocking pin 16.
In order to pivotally mount 5, the two pin holes 21a, 21
b is provided, and the interlocking link 15 is pivotally attached to the fork member 11 via the interlocking pin 16 inserted into one of the pin holes 21a and 21b. In addition,
The other points are the same as those of the first embodiment, and the operation is the same.

However, since both the pivotally attached portion of the drive link 12 with the bucket member 10 and the pivotally attached portion of the interlocking link 15 with the fork member 11 are positionally adjustable, the work attachment 8 is opened and closed. The angle and orientation can be adjusted according to the purpose of use, and the mounting pin 3
The work attachment 8 can be attached to the arm body 1 having different sizes between the pivot pin 6 and the pivot pin 6 without any trouble.

In the second embodiment, the case where two pin holes 20a, 20b, 21a, 21b are provided has been described, but the number is not limited. Further, only one of the drive link 12 side and the interlocking link 15 side may have a structure capable of position adjustment.

FIGS. 11 and 12 show a third embodiment of the present invention. Contrary to both the embodiments, the fork member 11 serves as an upper opening / closing member and the bucket member 10 serves as a lower opening / closing member. The work attachment 8 is configured.

That is, the work attachment 8 shown in FIGS. 11 and 12 has a structure in which the work attachment 8 shown in FIGS. 1 and 2 is turned upside down, and the tip of the hydraulic cylinder 2 is provided with the interlocking pin 16. It is connected to the position. In other respects, the structure is the same as that of the first embodiment and the operation is the same.

However, even in the case of the present embodiment, the first
The same effect as the embodiment can be obtained. However, in the case of the present embodiment, if the fork member 11 and the interlocking link 15 are removed and only the bucket member 10 is constructed, the hydraulic cylinder 2
However, in this case, the tip of the hydraulic cylinder 2 may be connected to the position of the connecting pin 9.

In the third embodiment, the case where the tip of the hydraulic cylinder 2 is connected to the position of the interlocking pin 16 has been described. The link 15 may be connected to a position different from the interlocking pin 16.

Although not particularly described in the third embodiment, as in the second embodiment, the drive link 12 is pivotally connected to the bucket member 10 or the interlocking link 15 is connected to the fork member 11. At least one of the pivotally attached portions may have a structure capable of adjusting the position, whereby the same effect as that of the second embodiment can be obtained.

Further, in each of the above embodiments, the case where the work attachment 8 is composed of the bucket member 10 and the fork member 11 has been described, but the present invention is not limited to this, and the upper fork member and the lower fork member are not limited to this. It can be similarly applied to a work attachment such as a fork grab configured by or a crusher configured by an upper blade member and a lower blade member.

[0040]

As described above, according to the invention of claim 1 of the present embodiment, the movement of the upper opening / closing member is transmitted to the lower opening / closing member. Both opening and closing members can be opened and closed by the expansion and contraction operation of the cylinder. Further, by removing the lower opening / closing member and the interlocking link from its pivotal portion, the upper opening / closing member can be configured as an attachment only for the upper opening / closing member without removing the upper opening / closing member from the arm body. There is no danger of becoming unnatural.

Further, in the invention according to claim 2 of the present invention, since the upper opening / closing member is constituted by the bucket member and the lower opening / closing member is constituted by the fork member, the fork member is pivotally attached to the existing excavation bucket. The work attachment of the present invention can be configured only by adding a fork member and an interlocking link to the bucket member by making such a change as possible, and it is possible to reduce the manufacturing cost and to effectively use the existing attachment. Can be used.

Further, in the invention according to claim 3 of the present invention, at least one of the pivotally connected portion with the upper opening / closing member of the drive link or the pivotally connected portion with the lower opening / closing member of the interlocking link is located at Since it is adjustable, the opening and closing angles and directions of both opening and closing members can be adjusted according to the purpose of use. Further, it can be attached to an earthworking machine having different dimensions between the attachment pin and the pivotal attachment portion of the operation link to the arm body without any trouble.

Further, in the invention according to claim 4 of the present invention, the work attachment in the invention according to claim 1 is turned upside down, and the position near the tip of the interlocking link is driven by the fluid pressure cylinder. Therefore, the same operation as the invention according to claim 1 can be obtained.

Further, the invention according to claim 5 of the present invention is
Since the position of at least one of the pivotally connected part with the lower opening / closing member of the drive link and / or the pivotally connected part with the upper opening / closing member of the interlocking link can be adjusted, it is also possible to use a vertically inverted work attachment. The opening and closing angles and orientations of both opening and closing members can be adjusted according to the purpose of use, and even for earthworking machines where the dimensions between the mounting pin and the pivotal attachment of the operating link to the arm body are different. It can be installed without any trouble.

[Brief description of drawings]

FIG. 1 is an open configuration diagram showing a work attachment of an earthworking machine according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram similar to FIG. 1 in a closed state.

FIG. 3 is a view, corresponding to FIG. 1, showing a second embodiment of the present invention.

FIG. 4 is a view similar to FIG. 2, corresponding to FIG.

FIG. 5 is a view corresponding to FIG. 3 showing the operation when the pivotal attachment position of the interlocking link to the fork member is changed.

6 is a view corresponding to FIG. 4 similar to FIG.

FIG. 7 is a view corresponding to FIG. 3 showing the operation when the pivotal position of the drive link to the bucket member is changed.

8 is a view corresponding to FIG. 4, which is similar to FIG.

FIG. 9 is a view corresponding to FIG. 3 showing an operation when both the pivotal attachment position of the interlocking link to the fork member and the pivotal attachment position of the drive link to the bucket member are changed.

10 is a view similar to FIG. 9 and corresponds to FIG.

FIG. 11 is a view, corresponding to FIG. 1, showing a third embodiment of the present invention.

12 is a view similar to FIG. 11 and corresponds to FIG.

[Explanation of symbols]

 1 Arm Main Body 2 Hydraulic Cylinder 3 Mounting Pin 5 Operating Link 6 Pivoting Pin 8 Work Attachment 9 Connecting Pin 10 Bucket Member 11 Fork Member 12 Drive Link 13 Pin 14 Drive Pin 15 Interlocking Link 16 Interlocking Pin 20a, 20b, 21a, 21b Pin Hole

Claims (5)

[Claims] 1. An upper opening / closing member and a lower opening / closing member whose base end portions are pivotally attached to each other to open and close up and down; and a mounting pin for attaching a position of the upper opening / closing member different from the pivotal attachment portion to a tip end portion of an arm body; A drive link whose one end is pivotally attached to the tip end of an actuating link whose base end is pivotally attached to the arm body, and whose other end is pivotally attached to a position above the mounting pin position of the upper opening / closing member; An interlocking link in which a base end portion is pivotally attached to a pivotal attachment portion of the operation link to the arm body, and a tip end portion is pivotally attached to a position different from a pivotal attachment portion with the upper opening / closing member of the lower opening / closing member. A work attachment for an earthworking machine, wherein both the opening and closing members are driven to open and close by driving a tip end portion of an operation link with a fluid pressure cylinder assembled to the earthworking machine. 2. The work attachment for an earthworking machine according to claim 1, wherein the upper opening / closing member is a bucket member, and the lower opening / closing member is a fork member that opens and closes at an opening of the bucket member. 3. The position of at least one of a pivotally connected portion with the upper opening / closing member of the drive link and / or a pivotally connected portion with the lower opening / closing member of the interlocking link is adjustable. Item 1. A work attachment for an earthworking machine according to item 1 or 2. 4. An upper opening / closing member and a lower opening / closing member whose base end portions are pivotally attached to each other to open and close up and down; and a mounting pin for attaching a position of the lower opening / closing member different from the pivotal attachment portion to a tip portion of the arm body; A drive link having a proximal end pivotally attached to the arm main body, one end pivotally attached to a distal end of the actuation link, and the other end pivotally attached to a position below the mounting pin position of the lower opening / closing member; An interlocking link whose end portion is pivotally attached to a pivotal attachment portion of the actuation link to the arm body, and a tip end portion is pivotally attached to a position different from a pivotal attachment portion with the lower opening / closing member of the upper opening / closing member, A work attachment for an earthworking machine, wherein both the opening / closing members are opened / closed by driving a position in the vicinity of a tip end portion of an interlocking link by a fluid pressure cylinder mounted on the earthworking machine. 5. The position of at least one of a pivotally connected portion with the lower opening / closing member of the drive link and / or a pivotally connected portion with the upper opening / closing member of the interlocking link is adjustable. Item 4. The work attachment of the earthworking machine according to item 4.