JPH0587039U - Bucket mount for power shovel - Google Patents

Abstract

(57) [Summary] [Purpose] A bucket that is interposed between the tip of the boom and the bucket for easy and quick attachment / detachment or replacement of the bucket, gripping claw, crushing device, etc. that are mounted on the power shovel. (EN) A fixture, which can be commonly used in various power shovels having different connecting pin intervals L with a single fixture. [Structure] A total of four link plates 2 and 3 on each side pivotally attached by a fulcrum pin 4 are provided.
The pin hole 13 of the fulcrum pin and the U-shaped holes 5 and 6 connected to the bucket are arranged on opposite sides of the connecting pin holes 11 and 12 connected to the boom side of the power shovel. ing. Each of the link plates 2 and 3 is pivotally mounted on each side individually by a fulcrum pin 4, and the link plate 2 or 3 on both sides is connected to the connecting pin holes 11 and 12.
The integral connecting pins 9 and 10 penetrating therethrough are inserted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bucket mounting tool that is interposed between the tip of a boom and a bucket in order to easily and quickly remove or replace a bucket mounted on a power shovel. Depending on the type of work, the power shovel is equipped with a gripping claw, a crushing device, etc., but these are collectively referred to as a bucket in this specification.

[0002]

[Prior Art]

 Currently, power shovels are widely used for various types of civil engineering work, and instead of the original bucket for excavation, depending on the type of work, a concrete input bucket, various buckets such as a gripping device and a rock drill. Is installed. In a relatively small-scale work, it is often necessary to perform various work with a single power shovel, and at that time, it is necessary to replace the bucket mounted on the tip of the boom of the power shovel according to the work. You will need it.

Originally, the bucket of a power shovel is mounted by pivotally connecting it to the tip of the boom and the tip of the front link with two pins. The replacement of the bucket thus mounted is This requires removing the two pins, replacing the bucket, and then inserting and fixing the two pins again, which makes the bucket replacement process troublesome.

Therefore, when it is necessary to frequently replace the bucket, a bucket mounting tool having a U-shaped hole facing or ejecting at a tip of a pair of members that are opened and closed by a telescopic mechanism such as a hydraulic cylinder or a screw rod. Then, install it on a power shovel with the same structure as a bucket, insert the two pins inserted on the bucket side into the two U-shaped holes, and open it (the U-shaped hole is The structure is such that the bucket is fixed by applying a tensioning force in the closing direction (when the U-shaped holes are provided in opposite directions).

FIG. 4 and FIG. 5 show an example of a conventional bucket attachment of this kind. In the one shown in FIG. 4, one of the paired members 2 and 3 is connected to the power shovel side. A hydraulic cylinder 31 is provided which is swingable around one of the connecting pins 9 for swinging and which is rockably driven with respect to the other 3, and the bucket 24 is provided with the hydraulic cylinder 31 retracted. Insert the tips of the members 2 and 3 between the two pins 22 and 23 that are inserted in the side, and extend the cylinder 31 to insert the pins 22 and 23 on the bucket side between the U-shaped holes 5 and 6. Then, the attachment 7 and the bucket 24 are integrated by being stretched in the opening direction.

In the structure shown in FIG. 5, one of the members 3 provided with the U-shaped holes 5 and 6 is slidably attached to the other member 2, and the member 3 is slid with the screw rod 16. Therefore, the two pins 22 and 23 of the bucket 24 are guided to the U-shaped holes 5 and 6, and the screw rod 16 moves the U-shaped holes 5 and 6 toward each other to pull them in the closing direction. 7 and the bucket 24 are integrated.

That is, by using the attachments 32 and 33, the bucket 24 can be easily and quickly attached and detached or replaced by an operation of widening the pair of members 2 and 3 with the cylinder 31 or the screw rod 16. It will be possible.

[0008]

[Problems to be solved by the device]

 The distance L between the connecting pins 9 and 10 respectively connected to the tip of the boom 1 of the power shovel and the tip of the front link 8 varies slightly depending on the manufacturer of the power shovel. Therefore, in principle, the bucket 24 to be attached to this is also one in which pin holes are provided at an interval matching the interval L, but a bucket that is relatively infrequently used and the above-mentioned fixtures 32 and 33. In many cases, it is difficult to prepare different pin hole intervals for each manufacturer economically or due to the delivery time. In such a case, the front link 8 of the power shovel can be swung freely. However, it is often the case that the ones with different pin hole intervals can be mounted, and therefore the ones with different pin hole intervals are often attached and the work done.

However, if so, the angle of the bucket 24 with respect to the movement of the front link 8 becomes different from the normal angle, and an excessive force is applied to the front link 8 during work, or in a narrower range than usual. However, there is a problem that the bucket can be swung.

The present invention provides a bucket mounting tool that can be commonly used for various power shovels having different connecting pin intervals L with a single mounting tool without causing the above-mentioned obstacles as much as possible. The challenge is to get it.

[0011]

[Means for Solving the Problems]

 The bucket mount of the power shovel of the present invention has a total of four link plates 2 and 3 on each side pivotally mounted by the fulcrum pin 4, and each link plate 2 and 3 is connected to the boom side of the power shovel. And the U-shaped holes 5 and 6 connected to the bucket, and the pin holes 13 of the fulcrum pins that connect the pair of link plates 2 and 3 to each other on opposite sides of the connecting pin holes 11 and 12. The link plates 2 and 3 forming a pair are individually pivoted by fulcrum pins 4 on each side, and the link pin holes 11 and 12 are provided with the link plates 2 or 3 on both sides. The connecting pins 9 and 10 that penetrate therethrough are inserted and connected to the boom tip of the power shovel and the front link. The telescopic mechanism 15 opens and closes the paired link plates 2 and 3 in synchronization. On both sides Ru der which is characterized in that it is arranged between the tank plate.

[0012]

[Action]

 In the above structure, unlike the conventional fixture, the pair of link plates 2 and 3 swings around the fulcrum pin 4 located at a position different from the mounting position of the connecting pins 9 and 10 to open and close. Sometimes, the spacing between the connecting pins 9 and 10 becomes wider and narrower, but this is not a problem per se, and when the bucket is fixed, that is, when the U-shaped holes 5 and 6 are regulated by the pin hole spacing L on the bucket side. The distance L between the connecting pins 9 and 10 becomes a problem. According to the above structure of this invention, since the connecting pins 9 and 10 are located between the fulcrum pin 4 and the U-shaped holes 5 and 6, if the pin hole spacing S of the bucket is narrow, the connecting pin The pin interval L also becomes narrow, and the pin hole interval S of the bucket is wide, the pin interval L of the connecting pin is also wide. Therefore, compared with the conventional mounting tool in which the pin spacing L of the connecting pin is fixed, the obstacles such as the change in operability and the limitation of the bucket swing angle due to the difference in the pin spacing between the power shovel side and the mounting side are alleviated. It will be possible to work in a state closer to the regular one.

When the fulcrum pin 4 is provided on the opposite side of the U-shaped holes 5 and 6 with respect to the connecting pins 9 and 10, the fulcrum pin 4 and the boom 1 or the front link when the bucket is swung. However, in the structure of the present invention, since the link plates 2 and 3 on both sides are individually connected by the fulcrum pin 4 and the fulcrum pin 4 does not penetrate, the fulcrum pin 4 is Since it is located outside the front link 8, it is possible to avoid interference with those members.

With the above structure, the fulcrum pin 4 can be provided at a position extending to the opposite side of the U-shaped holes 5 and 6 up to a position where it does not interfere with the front link 8. Even when the holes 5 and 6 are brought close to each other, the arm length between the telescopic mechanism 15 and the fulcrum pin 4 can be made sufficiently long, and the telescopic force of the telescopic mechanism 15 in the U-shaped holes 5 and 6 can be increased. Since it can be effectively transmitted as a bucket fixing force, and the distance between the connecting pins 9 and 10 and the U-shaped holes 5 and 6 can be narrowed after all, it is possible to further reduce the discomfort caused by the displacement of the mounting position of the bucket. You can

Further, since the fixture 7 having the above-mentioned structure can be constituted by the four link plates 2 and 3 having the same shape, the manufacturing cost can be reduced.

[0016]

Embodiments FIGS. 1 to 3 show an embodiment of the present invention. The pair of (two) link plates 2 and 3 located on both sides of the tip of the boom 1 of the power shovel are pivotally connected by a short fulcrum pin 4, and the opposite ends of the link plates 2 and 3 are connected. Are provided with U-shaped holes 5 and 6 facing outward (opposite direction). Further, connecting pin holes 11 and 12 are provided at an intermediate position between the pin hole 13 and the U-shaped holes 5 and 6, and the fitting 7 is attached to the tip of the boom 1 and the tip of the front link 8 of the power shovel. The connecting pins 9 and 10 for pivotally connecting are inserted into the connecting pin holes 11 and 12.

The connecting pins 9 and 10 which are inserted into the connecting pin holes 11 and 12 are integral parts that penetrate the pair of link plates 2 and 3 on both sides, and are the parts between the link plates on both sides. (Fig. 2) is inserted into the mounting holes provided at the tips of the boom 1 and the front link 8 of the power shovel.

The expansion and contraction mechanism 15 of the illustrated embodiment is of a screw type, and is located between the link plates on both sides in a portion between the connecting pin holes 11 and 12 and the U-shaped holes 5 and 6. The screw rod 16 of the expansion and contraction mechanism is rotatably and axially immovably supported by a bearing block 18 rotatably supported by one of the link plates 2 on both sides by a pin 17 protruding on both sides. The threaded portion 19 is screwed to a female threaded block 20 mounted on the other one 3 of the link plates on both sides in a similar structure. A rotary fitting joint 21 is formed at one end of the screw rod 16, and a handle is fitted to this portion to rotate the screw rod 16 so that the link plates 2 and 3 forming a pair on both sides are mutually connected. It is widened at the same time.

Therefore, with the screw rod 16 rotated to narrow the gap between the link plates 2 and 3 forming a pair, the tips of the link plates 2 and 3 are placed between the two pins 22 and 23 mounted on the bucket side. , The pair of link plates 2 and 3 are opened by rotating the screw rod 16 and the bottoms of the U-shaped holes 5 and 6 come into contact with the pins 22 and 23 on the bucket side. The bucket 24 is fixed to the tip of the fixture 7 by slightly rotating 16 to apply outward protruding tension to the pins 22 and 23 on the bucket side. The removal of the bucket 24 may be performed in the reverse operation. When the bucket is attached or detached, the distance between the connecting pins 9 and 10 changes as the pair of link plates 2 and 3 swing, but this change is absorbed by the swing of the front link 8. Will not hinder the replacement of

[0020]

[Effect of the device]

 The bucket mount of this invention can be flexibly accommodated by power shovels and buckets with different pin intervals between the mounting pins, and changes in operability when mounted on objects with different pin intervals and the bucket swing angle. The decrease can be mitigated. Further, since the structure is simple and it can be configured by four link plates of the same shape, it can be provided at low cost, and interference between the fulcrum pin extending to the boom side and the boom or front link can be avoided.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a front view of the embodiment shown in FIG.

FIG. 3 is a side view showing a state in which the power shovel of FIG. 1 is mounted.

FIG. 4 is a side view showing an example of a conventional similar device.

FIG. 5 is a side view showing another example of the conventional device.

[Explanation of symbols]

 1 boom 2, 3 link plate 4 fulcrum pin 5, 6 U-shaped hole 8 front link 9, 10 connecting pin 11, 12 connecting pin pin hole 13 fulcrum pin pin hole 15 telescopic mechanism

Claims (1)

[Scope of utility model registration request] 1. A total of four link plates (2), (3) on each side, which are pivotally attached by fulcrum pins (4), each link plate (2), (3) being The connecting pin holes (11), (12) that are connected to the boom side are sandwiched, and the opposite side of the link plates (2), (3) and the pin hole (13) of the fulcrum pin that connects them are connected. The U-shaped holes (5) and (6) connected to the bucket are arranged, and the pair of link plates (2) and (3) are on each side individually with fulcrum pins (4). It is pivotally attached, and the connecting pin holes (11) and (12) are inserted with the connecting pins (9) and (10) that penetrate through the link plates (2) or (3) on both sides, and the power shovel. It is connected to the front end of the boom and the front link, and a telescopic mechanism (15) that synchronizes and opens the pair of link plates (2) and (3) on both sides is arranged between the link plates on both sides. Characterized by , Bucket mount for power shovel.