JPH1096246A - Mounting construction of bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to simply mount a bucket with simple construction. SOLUTION: A first through-hole 24 of an arm 5 is fitted to a first pin hole 21 of a bucket 7 by interlocking a recess section of a hook mounted to the arm 5 with a boss section 23 of the bucket 7. By the constitution, the first pin hole 21 and first through-hole 24 are positioned to each other with simple operation interlocking the recess section with the boss section by moving the arm 5 so as to insert a first pin 9 to make it possible to simply connect the arm 5 to the bucket 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a bucket on an arm that swings back and forth with respect to a machine body of an excavating machine such as a power shovel.

[0002]

2. Description of the Related Art As a power shovel, for example, as shown in FIG.
A boom 3 is attached to this machine body 2 by a boom cylinder 4 so as to be swingable in the vertical direction. An arm 5 is attached to the boom 3 by an arm cylinder 6 so as to be swingable in the front-rear direction. 8 is known which is attached to be able to swing back and forth.

In the above-described power shovel, the bucket 7 is connected to the arm 5 with the first pin 9 and the bucket 7 is connected to the push link 10 with the second pin 11 to attach the bucket 7 to the arm 5. Thus, the bucket 7 swings in the front-rear direction with respect to the arm 5 via the bucket link 13 and the push link 10 by extending and contracting the piston rod 12 of the bucket cylinder 8.

In such a power shovel, excavation work using a bucket 7 is a main work, and an auxiliary work such as a breaker work is sometimes performed by detaching the bucket 7 and attaching an attachment such as a breaker to the arm 5.

By extracting the first pin 9 and the second pin 11, the bucket 7 can be removed from the arm 5,
The bucket 7 can be attached to the arm 5 by inserting the pin 9 and the second pin 11, but the pin hole of the arm 5, the push link 10 and the pin hole of the bucket 7 can be inserted to insert the first pin 9 and the second pin 11. Must be matched, and the operation of positioning the pin holes so as to match is troublesome.

[0006]

As described above, various bucket mounting structures have been proposed to match the pin holes. For example, a device using a connecting member as disclosed in Japanese Utility Model Application Laid-Open No. 6-57953 and a device using a frame attached to an arm and a push link as disclosed in Japanese Patent Application Laid-Open No. 6-108489 have been proposed.

However, since the connecting member, the frame, and the like are mounted on the normal mounting structure shown in FIG. 1, the number of parts is large and the cost is high. It may be.

When the connecting member is used, the position of the bucket with respect to the arm is different from the usual mounting structure, and the bucket may interfere with the boom.

Accordingly, an object of the present invention is to provide a bucket mounting structure capable of solving the above-mentioned problems.

[0010]

The first invention has a first pin hole 21, a second pin 22, and a boss 23 at the periphery of the first pin hole 21 on the back surface of the bucket 7. The mounting bracket 20 is fixed, a first through hole 24 is formed in the arm 5, a hook 26 having a concave portion 28 is formed in the arm 5, and the first pin hole 21 is formed when the concave portion 28 is engaged with the boss portion 23. The first pin hole 21 and the first through hole 24 are fitted so as to match with each other.
Is inserted to connect the arm 5 and the bucket 7, the push link 10 is connected to the bucket cylinder 13 provided on the arm 5, and the second pin 11 is connected to the pin hole 10 a and the second pin hole 22 of the push link 10. Push link 1
This is a bucket mounting structure in which 0 is connected to a bucket 7.

According to the first aspect, the bucket 7 is placed on the ground, and the arm 5 is moved to engage the concave portion 28 of the hook 26 with the boss portion 23 to thereby form the first pin hole 21 and the first through hole 2.
4 match, the first pin hole 21 and the first through hole 2
The arm 5 and the bucket 7 can be easily connected by inserting the first pin 9 into the 4.

Thus, the bucket 7 can be attached to the arm 5 by a simple operation.

Further, since the hook 26 is simply attached to the arm 5, the number of parts is small and the cost is low, and the hook 26 does not interfere with the work of the bucket. Further, since the normal mounting structure is used as it is, the position of the bucket with respect to the arm is the same as the normal mounting structure, and there is no possibility that the bucket will interfere with the boom.

A second aspect of the present invention is a bucket mounting structure in which the hook 26 of the first aspect is mounted such that the recess 28 faces the machine body.

According to the second invention, the operator of the machine body can move the arm while visually checking the positional relationship between the concave portion 28 of the hook 26 and the boss portion 23, and the concave portion 28 can be easily and quickly moved to the boss portion 23. Can be engaged.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 2, a pair of mounting brackets 20 are fixed to the back of a bucket 7.
Each mounting bracket 20 has a first pin hole 21 and a second pin hole 21.
A pin hole 22 is formed and the first pin hole 2
At the periphery of the first and second pin holes 22, a cylindrical boss portion 23 is provided outward.

A first pin through hole 24 is provided at the tip of the arm 5.
Are formed on both sides in the width direction, and second pin through holes 25 are formed on both sides in the width direction closer to the base end than the first pin through holes 24. Hooks 26 are fixed to both side surfaces in the width direction of the arm 5 with bolts 27, respectively.
The hook 26 has a substantially circular concave portion 28 fitted into the boss portion 23, and the center of the concave portion 28 and the center of the first through hole 24 coincide with each other.

As shown in FIG. 3, the first pin hole 21 and the first
The first pin 9 is inserted into the through hole 24 to connect the arm 5 and the bucket 7, and the second pin 11 is inserted into the pin hole 10 a and the second pin hole 22 of the push link 10, and the push link 10 is bucketed. 7 is connected.

Next, the procedure for mounting the bucket 7 will be described. As shown in FIG.
Place it on the ground so that it faces upward.

The boom 3 and the arm 5 are swung to move the hook 2
6 engages with the boss 23 of the bucket 7. At this time, since the concave portion 28 of the hook 26 is open toward the machine body 2, the operator sitting on the seat 30
The user can visually check the positional relationship between the concave portion 28 of the hook 26 and the boss portion 23 while operating 1, and the concave portion 28 can be easily engaged with the boss portion 23.

The arm 5 and the bucket 7 are connected by inserting the first pin 9 into the first pin hole 21 and the first through hole 24.

The boom 3 is moved upward to lift the bucket 7, and the bucket 7 and the push link 10 are manually swung so that the second pin hole 22 and the pin hole 10a are aligned with each other.
The push link 10 and the bucket 7 are connected by inserting the pin 11. Note that the push link 10 may be swung by expanding and contracting the piston rod 12 of the bucket cylinder 8.

The hook 26 is provided in the recess 2 as shown in FIG.
8 may be attached to face the opposite side of the machine body.

[Brief description of the drawings]

FIG. 1 is an overall front view of a power shovel.

FIG. 2 is an exploded perspective view of a bucket and an arm according to the first embodiment of the present invention.

FIG. 3 is a front view of a connected state of a bucket and an arm.

FIG. 4 is an explanatory diagram of a bucket mounting operation.

FIG. 5 is a front view of a state in which a bucket and an arm are connected according to a second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Machine main body 3 ... Boom 5 ... Arm 7 ... Bucket 9 ... 1st pin 10 ... Push link 11 ... 2nd pin 13 ... Bucket link 20 ... Mounting bracket 21 ... 1st pin hole 22 ... 2nd pin hole 23 ... Boss part 24 ... First through hole 26 ... Hook 28 ... Recess

Claims (2)

[Claims] 1. A first pin hole 21, a second pin 22, and a boss portion 23 at the periphery of the first pin hole 21 on the back surface of the bucket 7.
A first through hole 24 is formed in the arm 5, a hook 26 having a concave portion 28 is formed in the arm 5, and a first pin hole is formed when the concave portion 28 is engaged with the boss portion 23. The first pin hole 21 and the first through hole 24 are fitted so that the first pin 9 is fitted into the first pin hole 21 and the first through hole 24 so that the arm 5 and the bucket 7 are connected to each other. Connect the push link 10 to the link 13,
The pin hole 10a and the second pin hole 2 of the push link 10
2. A bucket mounting structure in which the push link 10 is connected to the bucket 7 by inserting the second pin 11 into the bucket. 2. The bucket mounting structure according to claim 1, wherein said hook is mounted so that a concave portion thereof faces the machine body.