JPH04202917A - Fitting structure of grab bucket attachment - Google Patents

Abstract

PURPOSE:To enable a digging work and a grabbing work by connecting the base end portion of a main driving side bucket main body and the base end portion of a driven side sub-bucket in such a manner as to freely rotate in the opposite directions by a hydraulic cylinder. CONSTITUTION:When a main driving side bucket main body 8 is turned backward by a compression stroke of a hydraulic cylinder 2, a driven side sub-bucket 9 is also turned in the opening direction, interlocking with the above movement, to open a grab bucket 7. In an elongation stroke of the hydraulic cylinder 2, the reverse operation is performed to close the grab bucket 7 and conduct a gripping work. A locking bracket 15 is provided on the forward end of the main driving bucket main body 8, and the driving side sub-bucket 9 is provided with a stopper 16 to which a locking bracket 15 is pressed at a full open position. Thus, the bucket main body 8 and the forward end of the sub-bucket 9 are just connected by a connection fitting (pin 10) to be used a one digging bucket.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an assembly structure of a double-grasp bucket attachment consisting of a bucket main body and a sub-bucket that rotate in opposite directions.

[Problem to be solved by the invention]

The bucket attachment that is attached to the end of the arm of the earthmoving machine is composed of a bucket body and a sub-bucket, and the bucket body and sub-bucket can be rotated in opposite directions to perform excavation work and grasping work. For example, it is known from Japanese Utility Model Publication No. 58-38049 r=publication.

In the conventional bucket attachment of this type, as shown in Fig. 1, the base ends of the bucket main body 8 and the sub-bucket 9 are coaxially connected to the mounting hole 4 at the tip of the arm 1, and the sub-bucket 9 is installed between the sub-bucket 9 and the guide link 5a. By operating the link 5b, both members are opened and closed in conjunction with each other.

Therefore, the number of link parts increases, and in order to prevent the plurality of links 5a, 5b, and 5c from interfering with each other and to operate in a predetermined manner, it is necessary to precisely design the mutual orbits of the links. Furthermore, since each bucket does not operate unless a dedicated link mechanism is used, it is not possible to use the links provided on the main body arm, and it is necessary to change the attachment of the links themselves.

Furthermore, when excavating by integrally connecting the main bucket and the sub-bucket, unnecessary links 5b must be removed as shown in FIG. 4b, making the work setup complicated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a double-grasp packet attachment that has a small number of parts and that can be opened and closed in a predetermined manner using links provided on the main body arm.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a double-grasp bucket attachment consisting of a bucket body and a sub-bucket, in which the base end of the driving side packet body rotated by a hydraulic cylinder and the base end of the driven side sub-bucket are rotated by a hydraulic cylinder. are rotatably connected in opposing directions, and the mounting hole of the driven side subpacket, which is provided at a remote position on the tip side of this connection, is pivoted to the mounting hole at the tip of the arm, and the mounting hole at the rear of the tip mounting hole of the arm is The tip of the actuating link is pivoted to the stay of the driving side bucket body directly or via a link.

[Effect]

Since the present invention has the above structure, the driven side sub-packet of the pair of bucket members whose base ends are connected so as to be openable and closable is pivoted to the mounting hole at the tip of the main body arm through the mounting hole, and is pivoted to the arm. Assembling the double-grasp packet attachment is completed by simply pivotally supporting the link and the hydraulic cylinder rod to the stay of the main drive side packet body, either directly or via another link. Then, when the main packet main body is rotated by the stroke of the hydraulic cylinder rod, it is rotated using the connection opening/closing fulcrum position of the pair of bucket members or the mounting hole of the driven subpacket as a fulcrum, and the main body of the driven side subpacket is rotated. The main drive side packet bodies are rotated in opposite directions, and both gripping buckets are opened and closed.

In this case, even if the length of the operating link or the distance between the arm tip attachment hole and the link attachment hole change, the position of the tip when opening and closing the double-grasp bucket, that is, the angle to the arm axis, will change, and the opening/closing function of the double-grasp bucket will be hindered. I can't.

In addition, the bucket main body and the tip side of the sub-bucket are connected with a connecting metal fitting to function as an integrated excavation bucket.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, 1 is an arm body connected to a boom of an earth-moving machine (not shown) such as a power shovel, and 2 is a hydraulic cylinder whose one end is connected to the base of the arm body 1.

As is well known, the arm body 1 has a mounting hole 4 at its tip for pivotally mounting various work attachments through a mounting pin 3, and has a mounting hole 4 at the rear thereof, which works with a rod 2' of the hydraulic cylinder 2 to drive both gripping buckets. One end of the guide link 5 is rotatably attached by a pin 6.

On the other hand, the double-grasp packet attachment 7 has a bucket main body 8 on the driving side and a sub-bucket 9 on the driven side, each of which is rotatably connected to each other by a connecting pin 10 .

The main drive side packet main body 8 has a stay 11 integrally formed on the back thereof, and a pin hole 12 for connecting the guide link 5 and the hydraulic cylinder tarot 2' is formed in the stay 11. In the figure, one bottle hole 12 is provided, or a plurality of bottle holes 12 may be provided with their positions shifted as appropriate.

On the other hand, the sub-bucket 9 on the driven side has a mounting hole for pivoting to the mounting hole 4 of the arm main body 1 at a position spaced toward the tip side from the pin hole 10' of the connecting pin 10 with the main drive side packet main body 8. It is equipped with 13.

In the present invention, the attachment hole 13 of the driven side sub-packet 9 of the double gripping packet attachment 7 configured as described above is pivotally attached to the tip attachment hole 4 of the arm body l via a pin 3, and the guide link 5 of the arm 1 is Each end of the cylinder rod 2' of the hydraulic cylinder 2 is pivotally connected to a pin hole 12 formed in a stay 11 of the driving side packet body 8 via a pin 14.

In the illustrated embodiment, the link 5 and the hydraulic cylinder rod 2'
may be directly pivoted to the bottle hole 12 of the stay 11, or may be connected via another link like the link 5c in FIG. 4.

In this way, the bucket main body 8 and the sub-bucket 9 are attached to each other (
Since the pin 10) is located at the rear of the shaft attachment part of the sub-bucket 9 to the main body arm 1, the main bucket main body 8 on the driving side rotates rearward due to the compression stroke of the hydraulic cylinder 2, as shown in Fig. 1. When this is done, the driven sub-bucket 9 also rotates in the opening direction, opening both gripping buckets.

On the other hand, as shown in FIG. 2, during the extension stroke of the hydraulic cylinder 2, both gripping buckets close in a reverse operation to perform a gripping action.

Preferably, a locking bracket 15 is provided at the tip of the main bucket body 8 on the driving side, and a stopper 16 is provided on the sub-bucket 9 on the driven side, with which the locking bracket 15 abuts in the fully open position.

In addition, as shown in FIG. 3, if necessary, a coupling fitting 17 with attachment/detachment marks for integrally coupling the two members is provided near the side tips of the packet body 8 and the sub-bucket 9. It is desirable that the excavation bucket 8 and the sub-bucket 9 can be used as an integrated excavation bucket.

〔Effect of the invention〕

As described above, the present invention allows opening and closing operations without using interlocking links between the sub-bucket and the guide link, thereby eliminating interference between the links, and therefore greatly simplifying design and assembly. Moreover, the number of parts is greatly reduced because a link assembly dedicated to the bucket is not required and a guide link provided on the main body arm can be used.

In addition, since the conventional bucket interlocking link is not used, when the packet main body and sub-bucket are used as an integrated excavation bucket, it is only necessary to connect the ends of both packets with a coupling fitting, and the link work is easy to remove. becomes unnecessary.

[Brief explanation of the drawing]

Fig. 1 is a side view of the double gripping bucket according to the embodiment of the present invention in the open state, Fig. 2 is a side view in the open state, Fig. 3 is a side view of the integrally connected state, Fig. 4a ('Z and Fig. 4b are It is a side view of a double-grasp bucket according to a conventional example. 1. Body arm, 2. Hydraulic cylinder, 3. Mounting bin, 5. Guide link, 7.-Double grip bucket.
8...Packet body, 9...Sub bucket, 1
0...Connection bottle, 15.Locking bracket, 1G
...stopper, 17...coupling metal fittings.

Claims (1)

[Claims] In a double-gripping bucket attachment consisting of a bucket body and a sub-bucket, the base end of the driving side bucket body rotated by a hydraulic cylinder and the base end of the driven side sub-bucket are rotatably connected in opposite directions, The attachment hole of the driven side sub-bucket, which is provided at a remote position on the tip side of this connecting part, is pivoted to the attachment hole at the tip of the arm, and the tip of the actuating link, which is pivoted to the rear of the tip attachment hole of the arm, is attached to the drive side sub-bucket. An assembly structure for a double-grip bucket attachment characterized by being pivoted to a stay of a side bucket body directly or via a link.