JPH1018336A - Simple mounting and dismounting device of work machine attachment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correspond to a simple mounting and dismounting device of an attachment having different distance between pins and mount and dismount the device by only one worker. SOLUTION: This simple mounting and dismounting device is provided with a first hook 14 which is engaged with a first pin 6 of an attachment 5, is in U-shape, and is opened outward and a screw shaft 30 which is provided in the vicinity of a work machine side of a second pin 7 of the attachment 5 and is inclined for a line which connects each center of the first pin 6 and the second pin 7 of the attachment 5 in a condition in which the attachment 5 is mounted. Furthermore, it consists of a storage box 20 having a cam plate 25 which supports the screw shaft 30 and lock the second pin 7, a slide piece 40 which is screw-fitted in the screw shaft 30 and of which rotation is prevented by the storage box 20, and a second hook 42 of which one end is supported on the slide piece 40 through a support pin 43 in such a manner that it can turn freely and of which the other end is engaged with the second pin 7 of the attachment 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple attachment / detachment device, such as a power shovel or a loader, which is attached to the tip of a working machine arm of a working vehicle and attaches and detaches various attachments.

[0002]

2. Description of the Related Art There are various types of simple attachment / detachment devices which are attached to the tip of a working machine arm of a power shovel and allow various attachments to be detachably attached. JP-A-7-331
690.

In Japanese Patent Application Laid-Open No. 4-327612, a pair of engagement links having pin holes at both ends are provided at the tip of an arm of a power shovel, and a U-shaped slightly surrounding the pin hole at the upper end of the engagement link. An engagement groove is formed. Pin holes are formed at four locations on the attachment so that both axes are parallel to each other, and an engagement ring into which the engagement groove of the engagement link is inserted is fixed around one of the pin holes. When the engagement groove is engaged with the engagement ring, the pin hole of the engagement link and the pin hole of the attachment are aligned. Then, the interval between the pin holes at both ends of the engagement link and the interval between a pair of pin holes of the attachment are made equal, and two attachment pins are inserted into each pin hole so that the attachment is attached to the tip of the arm. It was done.

When attaching an attachment to an engagement link, an operator operates a work machine to engage an engagement groove of the engagement link with an engagement ring of the attachment. Next, the arm and the attachment are connected by aligning the other pin hole of the engagement link with the other pin hole of the attachment, and inserting two connection pins into each of the pin holes.

FIG. 9 is a side sectional view showing the structure of a bucket attachment 50 proposed in Japanese Patent Laid-Open No. 7-331690.
Link 5 whose upper end is swingably connected by a pin 51
Pins 54 and 55 for connecting to the arm 1 and the front link 2 of the power shovel are mounted on upper portions of the excavators 2 and 53, and U-shaped holes 56 and 57 in opposite directions to the lower ends of the links 52 and 53, respectively. Is provided. The U-shaped holes 56 and 57 engage with the pins 6 and 7 of the bucket 5, respectively. A trunnion block 60 is attached to one of the links 52, and a screw rod 61 is attached rotatably and immovably in the axial direction.
1 is screwed into a screw hole 63 provided in a block 62 of the trunnion attached to the other link 53. Screw rod 61
A hexagonal head 64 is provided at the end on the side of the block 60, and the link 5 is turned by turning the screw rod 61 using a spanner or the like.
2 and 53 are rotated about the pin 51 so that the U-shaped hole 5
The space L of 6,57 is enlarged or reduced.

Next, a procedure for fixing the bucket 5 to the bucket attachment 50 will be described with reference to FIG. (1) First, the screw rod 61 of the attachment 50 described with reference to FIG. 9 is rotated to reduce the distance L between the U-shaped holes 56 and 57. (2) Next, as shown in FIG. 10A, the arm 1 and the front link 2 of the work machine are operated to engage the U-shaped hole 57 of the link 53 with the pin 7 of the bucket 5. (3) Next, as shown in FIG.
Then, the user operates the front link 2 to rotate the bucket mounting member 50 about the pin 7 so that the U-shaped hole 56 of the mounting member 50 can be aligned with the position at which the pin 6 of the bucket 5 can be engaged. (4) Next, as shown in FIG.
0, the screw rod 61 is rotated, and the distance L between the U-shaped holes 56 and 57 is reduced.
And the U-shaped hole 56 and the pin 6 are engaged with each other to couple the bucket 5 to the bucket attachment 50.

Since the proposed structure has the above-described structure, the distance L between the U-shaped holes 56 and 57 can be adjusted, and it is possible to cope with attachments having different distances between the pins 6 and 7. is there.

[0008]

However, the above configuration has the following problems. (1) In Japanese Unexamined Patent Publication No. 4-327612, a U-shaped groove of an engagement link is engaged with an engagement ring of one pin portion of a bucket, and then the other pin hole of the bucket and the other pin of the engagement link are engaged. The engagement link and the bucket are connected by aligning the holes and inserting two connection pins into each pin hole. In this case, the engagement between the engagement ring and the engagement groove can be performed from the cab of the power shovel, but it is difficult to confirm the positions of the pin hole of the bucket and the pin hole of the engagement link from the cab. It is. Therefore, a person who instructs the driver on the operation while looking at the positions of both pin holes is required, and two workers are required.

(2) In JP-A-7-331690, the U-shaped hole of one link is engaged with one pin of the bucket, and the alignment of the U-shaped hole of the other link with the other pin of the bucket is adjusted. Do. In this case, the engagement between the U-shaped hole of one link and one pin of the bucket can be performed as viewed from the cab of the excavator, but the position of the U-shaped hole of the other link and the other pin of the bucket is determined in the cab. It is difficult to confirm from. Therefore, a person who instructs the driver on the operation while looking at the positions of the U-shaped hole of the link and the pin of the bucket is required, and two operators are required. (3) A pin for connecting the arm and the front link of the power shovel shown in FIG.
Since the distance M from the character groove is large, when the driver operates in the driver's cab, an uncomfortable feeling occurs, and the operation is difficult to perform. (4) The device is large, heavy, and expensive.

The present invention has been made in view of the above problems, and can cope with two different pin intervals of various attachments, so that the operator can easily attach the attachment to the tip of the working machine arm of the power shovel. It is an object of the present invention to provide a lightweight and inexpensive simple attachment / detachment device for a working machine attachment that can be attached / detached, has no operational discomfort, and is inexpensive.

[0011]

In order to achieve the above object, a first invention of a simple attachment / detachment device for a work implement attachment according to the present invention is directed to a work machine arm mounted on a work vehicle. In a simple attachment / detachment device for a work implement attachment, which is attached to a tip end, and two hooks respectively connect two pins of the attachment to be detachable, a U-shaped outer side engaging with a first pin of the attachment is provided. A first hook that is open, a screw shaft that is installed near the work machine side of the second pin of the attachment when the attachment is mounted, and that is inclined with respect to a line connecting the centers of the first pin and the second pin of the attachment; A storage box having a swash plate for supporting the screw shaft and locking the second pin, a sliding piece screwed to the screw shaft and prevented from rotating by the storage box, The one end via a support pin rotatably supported by, and characterized by comprising further a second hook for engaging the other end to the second pin attachment to.

In the first invention, the operator operates the work machine in the cab to engage the first U-shaped hook with the first pin of the attachment, and then connect the second pin of the attachment. By contacting the swash plate of the storage box and then going to the side of the attachment and turning the screw shaft, the sliding piece is slid along the screw shaft to move the second pin of the attachment to the swash plate. By locking with the hook, the attachment can be connected to the simple attaching / detaching device. When the attachment is detached from the simple attachment / detachment device, the reverse operation may be performed. Therefore, the following effects can be obtained. (1) The operation work of the working machine in the cab is easy, and the attachment / detachment work of the attachment can be performed by one worker alone. (2) The sliding piece that rotatably supports the second hook via the support pin moves along the screw axis, and the swash plate is also arranged along the screw axis.
It is possible to cope with a change in the distance between the pin and the second pin, and the applicable range of the attached attachment is expanded. (3) Since the distance from the connection pin between the simple attachment / detachment device and the attachment to the connection pin between the simple attachment / detachment device and the attachment is shortened due to the compact structure, when the operator works in the cab. Work becomes easier without causing discomfort. Further, since the structure is made compact and light, the stability of the vehicle body is improved.

A second invention of a simple attachment / detachment device for a working machine attachment according to the present invention is characterized in that the screw shaft detent means in the first invention is detachably provided.

In the second aspect of the present invention, there is no danger that the connection between the simple attaching / detaching device and the attachment is loosened due to the screw turning during the operation, and the safety is ensured.

According to a third aspect of the present invention, the screw shaft connects the centers of the first and second pins of the attachment as the distance from the first pin increases. It is characterized by inclining away from the line.

In the third aspect of the present invention, since the operation section of the screw shaft can be installed at a position distant from the work implement attachment, the attachment / detachment work for the simple attachment / detachment device becomes easy.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a simple attachment / detachment device for a working machine attachment according to the present invention will be described below with reference to the drawings.

FIG. 1 is a side sectional view of the simple attaching / detaching device 10, FIG. 2 is a front view as viewed in the direction of arrow A in FIG. 1, and FIG. 3 is a bottom view as viewed in the direction of arrow B in FIG. 4 is a simple attaching / detaching device 1
It is a perspective view which shows the component structure of No. 0.

A plate 12 is fixed to the lower surfaces of a pair of brackets 11, 11 connected to the arm 1 and the front link 2 of the power shovel by pins 3 and 4, respectively. A pair of side plates 13 and 13 are fixed to the lower surface of the plate 12, and a U-shaped first opening opened outward at one end thereof.
The hook 14 is provided sideways. First hook 14
Indicates a bucket 5 indicated by a two-dot chain line (an example of an attachment)
Of the first pin 6. A storage box 20 is fixed to the other end of the side plate 13, and a hole 22 is provided in an upper end plate 21 of the storage box 20, and a hole 24 is provided in a lower end plate 23. Screws 3 with hexagonal heads 31 in holes 22 and 24
0 is rotatably inserted, and its lower end is prevented from coming off by a washer 32 and a split pin 33. A swash plate 25 having a window 26 is fixed to the lower surface of the storage box 20, and the lower surface of the swash plate 25 contacts the second pin 7 of the bucket 5.

A female screw 41 provided on a sliding piece 40 is screwed into the screw 30, and a second hook 4 whose one end is engaged with the second pin 7 of the bucket 5 is provided on both sides of the sliding piece 40.
The other end of 2 is rotatably attached by support pins 43,43. The flat part of the outer surface of the sliding piece 40 is the storage box 20.
Therefore, even if the screw 30 is rotated, it slides along the screw 30 without rotating. Therefore, support pin 4
3, the second pivotally attached to the sliding piece 40.
The hook 42 also moves along the screw 30 together with the sliding piece 40. The other end of the second hook 42 is connected to the window 26 of the swash plate 25.
Bucket 5 projecting from the swash plate 25
The second pin 7 is engaged. As the screw 30 moves away from the second pin 7, the first
The swash plate 25 is inclined so as to be away from a straight line XX connecting the centers of the pin 6 and the second pin 7, and the swash plate 25 is disposed substantially parallel to the screw 30. Accordingly, by rotating the screw 30 to separate the position of the support pin 42 from the second pin 7 of the bucket 5, the second pin 7 can be locked by the swash plate 25 and the second hook 42.

In FIGS. 3 and 4, a detent plate 34 for engaging the hexagonal head 31 of the screw 30 is fastened to the upper end plate 21 of the storage box 20 by a bolt 35 to prevent the screw 30 from being loosened during operation. Preventing. The detent plate 34 may be formed in an L-shape to be in contact with one side of the hexagonal head 31 and fastened by bolts 35.

In FIG. 1, since the second hook 42 can be moved along the screw 30 from the position shown by the solid line to the position shown by the broken line, the center distance between the engaging pins of the first hook 14 and the second hook 42 is Adjustment is possible between L1 and L2. Therefore, it is possible to cope with attachments having different pin-to-pin distances. Further, by simplifying the configuration of the simple attaching / detaching device 10, pins 3 and 4 for connecting the arm 1 and the front link 2 to the simple attaching / detaching device 10 and pins 6 and 6 for connecting the simple attaching / detaching device 10 and the bucket 5 are provided. Since the distance S to 7 is shorter than the conventional one, the operator does not feel uncomfortable and can easily work. As described above, the simple attachment / detachment device 10 is compact, light in weight, and low in cost.

The operation procedure of the attachment / detachment of the simple attachment / detachment device 10 will be described below with reference to FIGS. (1) First, the worker goes near the bucket 5 to remove the detent plate 34, rotates the screw 30, and moves the second hook 42 in the direction of arrow C. Next, the operator operates the work machine on the cab of the power shovel to engage the first hook 14 of the simple attaching / detaching device 10 with the first pin 6 of the bucket 5. (FIG. 5
(2) Next, the operator operates the work machine in the operator cab of the power shovel, and rotates the simple attaching / detaching device 10 in the direction of arrow M about one pin 6 of the bucket 5. At this time, the tip of the second hook 42 contacts the second pin 7 of the bucket 5 and rotates in the direction of arrow N. (See Fig. 6)

(3) Next, the operator operates the work machine to further rotate the simple attaching / detaching device 10 in the direction of arrow M about the first pin 6 of the bucket 5 to move the swash plate 25 to the first position of the bucket 5. 2 Contact the pin 7. In this state, the second hook 42 and the second pin 7 are aligned with a position where they can be engaged. In order for the swash plate 25 to abut on the second pin 7, there is no particular need to confirm the position, and the operator can work alone in the cab of the loader. (4) Next, the worker goes to the side of the bucket 5 and
Then, the second hook 42 is pulled up in the direction of arrow D by rotating 0, the second pin 7 is locked by the swash plate 25 and the second hook 42, and the simple attaching / detaching device 10 and the bucket 5 are connected. Thereafter, the detent plate 34 is engaged with the hexagonal head 31 of the screw 30 and tightened with the bolt 35 to complete the operation. (See FIG. 8) Therefore, the joining operation can be easily performed by one worker.

When the bucket 5 is to be detached from the simple attaching / detaching device 10, the operation is performed in the reverse order of the above, and the explanation is omitted.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a simple attaching / detaching device of the present invention.

FIG. 2 is a bottom view of FIG.

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a perspective view showing a component configuration of FIG. 1;

FIG. 5 is an explanatory diagram of a first procedure of an operation of connecting the simple attaching / detaching device and a bucket.

FIG. 6 is an explanatory diagram of a second procedure following FIG. 5;

FIG. 7 is an explanatory diagram of a third procedure following FIG. 6;

FIG. 8 is an explanatory diagram of a fourth procedure following FIG. 7;

FIG. 9 is a side sectional view of a conventional simple attaching / detaching device.

FIG. 10 is an explanatory diagram of a procedure of an attachment connecting operation of FIG. 9;

[Explanation of symbols]

Reference numeral 5: bucket, 6: first pin, 7: second pin, 10: simple attachment / detachment device, 13: side plate, 14: first hook, 20: storage box, 25: swash plate, 30: screw shaft, 34: rotation Stop plate,
40: sliding piece, 42: second hook, 43: support pin.

Claims (3)

[Claims] 1. A simple attachment / detachment device for a work implement attachment, which is attached to a tip of a work machine arm mounted on a work vehicle, and two hooks respectively connect two pins of the attachment to be detachable. Attachment 1
A first hook which is open in a U-shape and is outwardly engaged with the pin;
In a state where the attachment is mounted, the screw shaft is installed near the work machine side of the second pin of the attachment, and is inclined with respect to a line connecting the centers of the first pin and the second pin of the attachment. A storage box having a swash plate for locking the second pin, a sliding piece screwed into the screw shaft and prevented from rotating by the storage box, and one end of the sliding piece connected to the sliding piece via a support pin. A simple attachment / detachment device for a work implement attachment, comprising a second hook rotatably supported and engaging the other end with a second pin of the attachment. 2. A simple attachment / detachment device for a work implement attachment according to claim 1, wherein said rotation preventing means for said screw shaft is detachably provided. 3. The simple attachment / detachment device for a work implement attachment according to claim 1, wherein the screw shaft is inclined away from a line connecting centers of the first pin and the second pin of the attachment as the distance from the first pin increases. A simple attachment / detachment device for a working machine attachment.