JP2000273893A - Attachment fixture for power shovel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use various power shovels and attachments whose diameters of mounting pins and mounting widths differ in general-purpose application in a fixture used when various work attachments are mounted on the power shovel. SOLUTION: This attachment fixture for a power shovel is provided with a main body 34 connecting an attachment 17 with an arm 11 of the power shovel and a front link, a spacer 35 provided in a clearance formed between the main body and the attachment and/or a spacer interposed in a clearance formed among the main body, the arm, and the front link. The spacers 35, 37 have cylindrical shape, cylindrical shape with collar or disc shape with hole having a central hole 36 having the same diameter as a mounting pin 18 of the attachment or a connection pin 13 connected with the power shovel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting tool used for mounting various work attachments to an arm and a front link of a power shovel, and various power shovels having different mounting pin diameters and mounting widths. And attachments that can be used for attachments in general.

[0002]

2. Description of the Related Art Various types of work attachments have been developed which can be used in exchange for buckets because of the three-dimensional movement of an arm of a power shovel and the ability to easily supply energy to the attachment by hydraulic piping. Examples of this type of attachment include a clamshell, a one-claw ripper, a breaker, a crusher, a gripper device, and the like. Since these attachments are mounted on the arm instead of the bucket when a specific operation is required, an attachment mounting tool for easily and quickly attaching / detaching or exchanging the attachment has been proposed. .

FIGS. 4 to 6 show an example of this type of attachment fixture proposed by the present applicant. The illustrated attachment fixture includes links 2 and 3 made of a total of four plate members on each side pivotally connected by a fulcrum pin 23. Each of the links 2 and 3 has a connecting pin hole 15 and 16 connected to the arm 11 and the front link 12 of the power shovel at a longitudinally intermediate position, and a pin hole 29 of a fulcrum pin is disposed above the connecting pin hole. U-shaped holes 21 and 22 connected to the bucket are provided below. The pair of links 2 and 3 are individually pivotally connected by short fulcrum pins 23 on each side of the arm 11. on the other hand,
Long connecting pins 13, 14 penetrating the link 2 or 3 on both sides are inserted into the connecting pin holes 15, 16, and the connecting pins 13, 14 are provided in bucket mounting holes provided at the tip of the arm of the power shovel and the front link. , The attachment mounting tool is attached to the tip of the arm of the power shovel.

The links 2 and 3 located on both sides of the arm 11
Between them, a telescopic mechanism 26 that swings the links 2 and 3 around the fulcrum pin 23 to open and close is arranged. Telescopic mechanism 26
Is, for example, a hydraulic cylinder or a screw rod.

[0005] To attach the bucket 17 to the arm 11 via the above-mentioned attachment fixture, the following is performed. The mounting pins 18 and 19 are inserted through the mounting pin holes of the bucket 17 in advance. Attachment attachment 1 is attached to the arm and the front link with the connecting pin. Then, the space between the U-shaped holes 21 and 22 is reduced by operating the expansion / contraction mechanism 26. Next, one of the mounting pins 18 and 19 of the bucket 17 is inserted into one of the U-shaped holes, and the other pin is opposed to the other U-shaped hole.
In this state, the space between the U-shaped holes is widened by operating the expansion / contraction mechanism 26, and the U-shaped holes 21 and 22 finally extend in the direction in which the mounting pins 18 and 19 are expanded, thereby fixing the bucket 17.

In the attachment fixture 1 having the above structure, since the connection pins 13 and 14 are located between the fulcrum pin 23 and the U-shaped holes 21 and 22, if the pin hole interval S of the bucket is small, the connection is performed. The pin interval L between the pins is also reduced, and if the pin hole interval S between the buckets is increased, the pin interval L between the connecting pins is also increased. Therefore, obstacles such as a change in operability due to a difference in the pin interval of the attachment and a limitation of the bucket swing angle are alleviated, and various attachments having different pin hole intervals S of the mounting pins can be used.

[0007]

[Problems to be Solved by the Invention] There are a plurality of manufacturers of power shovels, and each maker has a number of models, and power shovels of different models have different arm tip widths and connecting pin diameters. There are many. For this reason, conventionally, an attachment fixture that matches the tip width of the arm and the outer diameter of the connecting pin has been manufactured. However, there is a demand to use one attachment for all models, and a demand to use an attachment of a manufacturer different from the manufacturer of the excavator.

However, in the conventional attachment fixture,
Although it is possible to cope with the difference in the pin interval of the attachment, if the mounting width or the pin diameter is different, a gap will be created between the arm or the attachment and the mounting tool, and the operating force will not be transmitted accurately or the operating force will be reduced. Attachments from other manufacturers could not normally be used because of the risk of acting unevenly and causing an accident.

The present invention provides a general-purpose attachment fixture that can cope with a difference in the end width of the arm or the diameter of the connecting pin, or a difference in the bracket width of the attachment or the diameter of the mounting pin. That is the task.

[0010]

SUMMARY OF THE INVENTION An attachment mounting tool for a power shovel according to the present invention includes a body 34 for connecting the attachment 17 to the arm 11 and the front link 12 of the power shovel, and a gap formed between the body and the attachment. And / or a spacer 37 interposed in a gap formed between the body and the arm and the front link.

The main body includes a pair of links 2 and 3 having upper plates 6 and 7 located on both outer sides of the distal end of the arm and the front link and U-shaped holes 21 and 22 located inside a bracket of the attachment. Each of the links 2 and 3 has a connecting pin hole 15 and 16 connected to the arm and the front link at an intermediate position in the longitudinal direction. Are arranged, and the U-shaped hole 2 facing downward or in the opposite direction.
1, 22 are arranged.

A spacer 35 interposed in a gap formed between the main body and the attachment has a center hole 36 having the same diameter as the mounting pins 18 and 19 connecting the main body and the attachment.
, A flanged cylinder or a perforated disc. Further, a spacer 37 interposed in a gap formed between the main body, the arm and the front link is provided with a connecting pin 1 for connecting the main body, the arm and the front link.
It has a cylindrical shape having a center hole 38 of the same diameter as 3, 3 or 14, a flanged cylindrical shape or a perforated disk shape.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The attachment mounting tool of the present invention comprises a power shovel arm 11 and an attachment 17.
And a spacer 35 interposed between the main body and the arm, the front link, and / or the attachment.

The body 34 of the attachment fixture is provided with a pair of links 2 and 3, which are pivotally connected by fulcrum pins 23 so that the distance between them can be made wider and narrower. Each of the links 2 and 3 is located on both inner sides of horizontal connecting plates 4 and 5, a pair of upper plates 6 and 7 which are to be located on both sides of the arm, and two brackets of the attachment. A pair of lower plates 8 and 9, the connecting plate and the pair of upper plates forming a wide U-shape in which the connecting plate and the pair of lower plates face downward. Is formed.

The connecting pins 13 and 14 for connecting the attachment fixture 1 to the arm 11 and the front link 12 of the power shovel are inserted into connecting pin holes 15 and 16 provided at intermediate positions of the upper plates 6 and 7. Attachment attachment 1
U-shaped holes 21, 22 for fixing the mounting pins 18, 19 of the bucket 17 to the outside are provided on a receiving block 30 that connects the tips of the lower plates 8, 9 on both sides.

The links 2 and 3 are connected by pivotally connecting the upper plates on both sides with short fulcrum pins 23.
The links 2 and 3 relatively swing around the short pin 23 to widen or narrow the interval between the U-shaped holes 21 and 22.

Between the lower plates 8 and 9 on both sides, block-shaped trunnions 24 and 25 having pins protruding on both sides are mounted while the pins on both sides are pivotally supported by the lower plates 8 and 9 on both sides. ing. The base end of a screw rod 26 is rotatably and axially immovably supported by the trunnion 24 on one side of the link, and the screw rod 26 is screwed to the other trunnion 25. The screw rod 26 has a hexagonal screw head 27 at its base end. By inserting a box spanner or the like into this screw head and rotating the screw rod 26, the distance between the U-shaped holes 21 and 22 is increased and decreased. The bucket 17 is fixed and removed.
The screw head 27 is provided with a split pin hole penetrating in a direction perpendicular to the axis. The screw rod 26 is fixed by inserting a rectangular plate-shaped lock plate having a rectangular hole at the center and having a rectangular hole to be fitted into the screw head 27 into the screw head 27 so as to fit between the lower plates 8 and 9 on both sides.
This is performed by preventing the lock plate from falling off by passing the split pin through the split pin hole.

The receiving block 30 has a smaller inner width of the bracket 31 than the smallest one among all the attachments to be mounted on the power shovel, and the U-shaped holes 21 and 22 are provided in the mounting holes 32 of the bracket. Are formed smaller than the smallest one. The mounting pin 18 connecting the main body 34 and the attachment has the same diameter as the U-shaped hole 21.

The spacer 35 has a cylindrical shape and a flange which just fits into a gap formed between the main body 34 and the bracket 31 of the attachment or a gap formed between the mounting pin 18 and the mounting hole 32 of the attachment. The diameter of the center hole 36 is the same as the diameter of the mounting pin 18.

Next, a method of attaching various attachments to the arm using the attachment attachment will be described. The attachment shown in the lower left of FIG.
The width of the receiving block 30 of the main body is smaller than the inner width of the bracket 31. For such an attachment, a flanged cylindrical spacer 35 is inserted into the mounting hole 32 from the inside, and the center hole 3 of the spacer 35 is inserted.
6. Insert the mounting pin into 6. Then, the attachment is attached without gaps by extrapolating the U-shaped hole 21 of the main body to the attachment pin 18.

The attachment shown in the lower center of FIG.
The mounting hole 32 of the bracket has the same diameter as the U-shaped hole 21 and the inner width of the bracket 31 is
Is approximately the same as the width of Such an attachment can be attached without a gap without using a spacer.

The attachment shown in the lower right of FIG. 2 has a bracket mounting hole 32 of the same diameter as the U-shaped hole 21 but the inner width of the bracket 31 is slightly larger than the width of the receiving block 30 of the main body. is there. In this case, a perforated disk-shaped spacer 35 is inserted into the mounting pin 18 so as to be positioned inside the bracket, and the receiving block 30 of the main body is extrapolated between the spacers 35 so that the attachment is formed with a gap. Install without.

FIG. 3 shows an example of a spacer provided on the upper plate side, and shows a fixture which can be attached to various arms having different tip widths. The attachment includes a main body 34 and a spacer 37 interposed between the arm 11 and the front link 12.

The connecting pin holes 15 and 16 of the main body 34 are formed to be larger in diameter than the outer diameters of the connecting pin 13 of the front link and the arm of the power shovel to which the fitting is to be mounted. Further, the inner width of the upper plate is formed to be wider than the maximum width of the distal ends of the arms and front links of the power shovel to be mounted. Spacer 37
Is a cylindrical shape, a flanged cylindrical shape, or a perforated disk shape which just fits in a gap formed between the main body 34 and the arm 11 or a gap formed between the connecting pin 13 and the connecting pin hole 15. The diameter of the center hole is the same as the diameter of the connecting pin 13.

Next, a method of attaching the attachment fixture of this embodiment to arms of various shapes will be described. The upper left diagram of FIG. 3 is a diagram in which the width of the arm is the same as the inner width of the upper plate of the main body, but the diameter of the connecting pin is smaller than the pin hole of the upper plate. The cylindrical spacer 37 is inserted into the pin hole 15, the upper plate 6 is positioned on both sides of the arm, and the connecting pin 13 is inserted. Thereby, the arm and the attachment can be connected without any gap.

FIG. 3 is a view in the case where the width of the arm is the same as the inner width of the upper plate of the main body, and the connecting pin 13 and the pin hole 15 of the upper plate have the same diameter. In this case, the attachment can be attached to the arm without any gap without using the spacer 37.

The upper right part of FIG. 3 shows a case where the width of the arm 11 is smaller than the inner width of the upper plate 6 of the main body, and the connecting pin 13 and the pin hole 15 of the upper plate have the same diameter. In this case, a perforated disc-shaped spacer 37 is attached to the inside of the upper plate, and the tip of the arm is inserted between the spacers and the connecting pin 13 is inserted into the pin hole 15 to attach the mounting member to the arm without any gap. Can be When there is a gap between the connecting pin and the mounting hole and between the arm and the upper plate, the mounting fixture can be mounted without a gap by using a flanged cylindrical spacer.

By using the attachment fixture having both the structure described with reference to FIG. 2 and the structure described with reference to FIG. 3, the arm, the front link, and the attachment can be mounted without any gap, and therefore, one fixture Accordingly, a versatile attachment fixture capable of connecting various types of excavators and various attachments can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of an attachment fixture.

FIG. 2 is a front view showing the first embodiment.

FIG. 3 is a front view showing a second embodiment.

FIG. 4 is a side view of a conventional attachment fixture.

FIG. 5 is a front view of a conventional attachment fixture.

FIG. 6 is a side view in which a bucket is attached via an attachment fixture.

[Explanation of symbols]

 1 Attachment attachment 2,3 Link 4,5 Connecting plate 6,7 Upper plate 8,9 Lower plate 11 Arm 12 Front link 13,14 Connecting pin 15,16 Pin hole 17 Bucket 18,19 Mounting pin 21,22 U-shaped Hole 23 Support pin 26 Screw rod 31 Bracket 34 Body 35 Spacer 36 Center hole 37 Spacer 38 Center hole

Claims (3)

[Claims] 1. A body (34) for connecting an attachment (17) to an arm (11) and a front link (12) of a power shovel.
And a spacer (35) interposed in a gap formed between the main body and the attachment, wherein the main body includes an upper plate (6, 7) located on both outer ends of the ends of the arms and the front link, and an attachment. U-shaped hole (2
1,22) and a pair of links (2,3)
(2, 3) has a connecting pin hole (15, 16) connected to the arm and the front link at an intermediate position in the longitudinal direction, and a fulcrum pin (23) for pivotally connecting the pair of links to each other above the connecting pin hole.
Pin holes (29) are disposed, U-shaped holes (21, 22) facing downward or in opposite directions are disposed, and the spacer is provided with mounting pins (18, 18) for connecting the main body and the attachment.
A power shovel attachment attachment having a cylindrical shape, a flanged cylindrical shape or a perforated disk shape having a center hole (36) having the same diameter as that of 19). 2. A body (34) for connecting an attachment (17) to an arm (11) and a front link (12) of a power shovel.
And a spacer (37) interposed in a gap formed between the main body, the arm and the front link, and the main body includes an upper plate (6, 7) and a pair of links (2, 3) each having a U-shaped hole (21, 22) located inside the bracket of the attachment. A connection pin hole (15, 16) for connecting to a link is provided, and a pin hole (29) of a fulcrum pin (23) for pivotally connecting the pair of links to each other is disposed above the connection pin hole. U-shaped holes (21, 22) facing in opposite directions are arranged, and the spacer has a center hole (38) having the same diameter as the connecting pin (13, 14) connecting the main body to the arm and the front link. )
An attachment attachment for a power shovel, wherein the attachment is a cylindrical shape, a flanged cylindrical shape or a perforated disk shape having the following. 3. A spacer (37) interposed in a gap formed between the main body and the arm and the front link of the excavator, the spacer being a connecting pin connecting the main body, the arm and the front link. The attachment attachment for a power shovel according to claim 1, wherein the attachment is a cylindrical shape, a flanged cylindrical shape or a perforated disk shape having a center hole (38) having the same diameter as (13, 14).