KR100263532B1 - A wear proof bucket of an excavator - Google Patents

Abstract

PURPOSE: An abrasion resistant bucket of an excavator is provided to increase abrasion resistance and to extend the lifetime of a bucket by using abrasion resistant material at a part requiring abrasion resistance in the bucket and improving the structure of a part having a large load. CONSTITUTION: An excavator bucket(1) has a side panel(3) joined with both sides of a back panel(2) and plural side blades(12) welded to the front end of the side panel. A shovel(4) is connected across the lower end of the back panel, and plural tooth adaptors(5) are welded to the shovel with a distance. Thereby, a frame is formed. The shovel is used with abrasion resistant steel having hardness of HB300-600. A welding portion between the shovel and the side panel is covered by a protrusion portion of the shovel. Thereby, the bucket has low abrasion caused by friction with sand. To reinforce the side panel, reinforcements(10a-10c) are joined to the side panel. A welding portion(11) of the tooth adaptor has no undercut and crack. Therefore, the bucket has a long lifetime.

Description

Wear resistant bucket of an excavator

The present invention relates to a bucket of an excavator, in particular to use a wear-resistant material in the part of the bucket of the excavator to improve the wear resistance by improving the structure of the part subjected to a large load during work wear resistance of the excavator is extended life It's about the bucket.

The bucket of construction equipment such as excavators and loaders is the most wearable part because it directly excavates hard surface minerals, scrapes of crushed stone of crushing stone, and seas of sand sand.

As shown in Fig. 8, the bucket has side plates 3 bonded to the left and right sides of the back plate 2, and the side edges 12 are welded to the front ends of the left and right side plates 3, respectively. A long shovel 4 is joined to the lower end of the long shovel 4, and a plurality of tooth adapters 5 are welded to each other at predetermined intervals.

By the way, when the enumeration of the parts of the bucket bucket is most likely to be listed as follows.

First, the long shovel (4) portion of the bucket is a part that is in direct contact with the workpiece, such as soil during the excavation work is the portion where wear occurs most severely. The wear occurring in the long shovel 4 part occurs in the direction of encroaching inwardly from the tip of the long shovel 4.

Second, the portion of the bucket shovel 4 and the side blades 12 is a portion where friction occurs with the soil and rubble during the excavation work with the bucket, the conventional shovel 4 is shown in FIG. As noted, it was common to weld the lateral edges 12 in a state substantially coincident with the outer portion of the lateral edges 12 so that the tip does not protrude out of the lateral edges 12.

Therefore, since the welding site is exposed to the outside of the side blade 12, the excavation work repeatedly rubs with the soil or boulder while rubbing away, and when the welding site is damaged, the long shovel 4 is separated from the side blade 12.

Third, when the conventional tooth adapter 5 is welded to the long shovel 4, as shown in FIG. 8, the tip of the long shovel 4 is welded in the form of a convex bead into the bucket along the edge of the tooth adapter 5. Because of this, there was a problem in that welding defects such as undercut due to welding heat and CRACK of the weld portion occurred at the tip of the long shovel 4.

Conventionally, the welding was repeated several times with low current, but this method had a small amount of welding, so the welding had to be overlapped several times. Accordingly, the weld becomes convex bead and the melting of the base material due to the welding heat is excessive, resulting in the end of the weld. An undercut that dents the base material part connected with the dent occurred. In addition, because of overlapping welding, boundary and pore due to cooling speed difference between the first welded part and the later welded part were generated, and this undercut, boundary part, and pore used to cause CRACK.

Fourth, the back plate (2) portion of the bucket is a place where abrasion occurs in direct sliding contact with the soil during the excavation work, conventionally, the back plate reinforcement (9) is applied to the back plate (2) to reinforce the strength and wear resistance. By the way, since the conventional back plate reinforcement (9) is used by rolling a wide plate or a wide plate, a large gap is generated between the curved surface of the back plate (2) and the reinforcing bar (9) to lower the bonding strength of the reinforcement (9). There was a problem to let.

Fifth, the side of the bucket is a place where abrasion occurs badly while directly rubbing with the soil when excavating, when the side is worn, the side strength of the bucket is lowered, causing the bucket to open sideways.

Accordingly, the present invention has been made to solve the problems of the conventional excavator bucket vulnerable to wear, and an object of the present invention is to provide a wear-resistant bucket of the excavator to reduce the wear of the bucket to extend the life.

In order to achieve the above object, the present invention uses a high-strength wear-resistant steel of hardness HB300 ~ HB600, and when the side blades and long shovels are welded, the side edges of the side blades are welded so as to protrude to the outside of the side plate by a predetermined length to weld the side blades and the long shovel. Covering the area prevents abrasion due to soil and direct friction, and reduces the width of each of the multiple reinforcement reinforcements that are applied to the back in the horizontal direction to reduce the gap between the reinforcing reinforcement and the bottom of the reinforcement. Increased strength

When welding the tooth adapter to the long shovel, the welding part is welded so as to have a concave bead shape, but the inside of the bucket is welded to the long shovel tip to prevent undercutting and crack of the long shovel tip part due to the welding heat. While increasing the bonding strength, the side plate lower reinforcing bar joined to the side plate is configured to increase wear resistance by using a wear resistant steel material.

In addition, by welding from the inside of the bucket toward the tip of the long shovel, the welding heat affected zone proceeds to the long shovel side, that is, the open space exposed to the atmosphere.

The bucket of the present invention having the above-described structure is less wear of the welding portion of the long shovel and the side plate, the strength of the side plate is increased by the side plate reinforcement made of abrasion resistant steel, the gap between the back plate reinforcement and the back plate is reduced, the earth and sand in this gap In addition, it is possible to prevent lowering the joint strength of the back reinforcement, and undercut does not occur at the welded portion of the tooth adapter, thereby increasing the joint strength of the tooth adapter, thereby increasing the life of the entire bucket.

1 is a perspective view of an excavator bucket according to the present invention.

Figure 2 is a longitudinal side view of Figure 1;

FIG. 3 is a cross-sectional view showing a state of engagement between the long shovel and the side blades by cutting along the line "A-A" in FIG.

Figure 4 is a rear view showing a state in which the back reinforcement is attached to the back of the excavator bucket according to the present invention.

FIG. 5 is a cross-sectional view illustrating an attachment state of the back reinforcement bar and the back plate by cutting along the line “B-B” of FIG. 4; FIG.

FIG. 6 is an enlarged cross-sectional view illustrating a state in which a tooth adapter is welded to a long shovel by cutting along the line “C-C” of FIG. 2;

Figure 7 is an enlarged cross-sectional view showing a state that the lower reinforcing bar is attached to the side plate by cutting along the line "D-D" of FIG.

8 is a perspective view of a bucket of a conventional excavator.

* Explanation of symbols for main parts of the drawings

1 Excavator bucket 2 according to the present invention

3: side plate 4: long shovel

5: tooth adapter 6: point

7: pin 8: weld of side plate and long shovel

9: back reinforcement 10a: upper reinforcement

10b: Central reinforcement table 10c: Lower reinforcement table

11: welding part of the tooth adapter 12: side blade

Hereinafter, an embodiment of an excavator bucket according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of an excavator bucket according to the present invention. Excavator bucket 1 according to the present invention, as shown in Figure 1, the side plate 3 is bonded to the left and right sides of the back plate 2, the side edges 12 are respectively at the front end of the left and right side plates (3) A long shovel 4 is joined across the lower end of the back plate 2, and a plurality of tooth adapters 5 are welded to each other at predetermined intervals to form a skeleton.

As shown in FIG. 2, a plurality of tooth adapters 5 are welded to the long shovel 4 so that the points 6 are provided as pins 7.

Here, the long shovel 4, as shown in Figure 3, using the wear-resistant steel of about HB300 ~ HB600 hardness, the both ends are joined to slightly protrude to the outside of the side edge 12, the side edge 12 ) And the welded portion 8 of the long shovel 4, the welded portion 8 is in direct contact with a work object such as earth and sand to prevent wear. If the protruding length of the long shovel 4 is too long, the bonding strength is lowered, so the protruding length is preferably about 5 to 100 mm.

In addition, as shown in Figure 4, the back plate 2, the plurality of back plate reinforcing bars 9 are bonded in parallel to each other in the horizontal direction.

Each of the backrest reinforcement 9 is bonded to the backrest 2 with a predetermined distance from the adjacent backrest reinforcement 9 using a wear resistant steel having a hardness of HB300 ~ HB600, as shown in FIG. 15 to 100 mm is maintained so that the amount of soil deposited in the gap is not excessive.

In addition, it is preferable that each of the back reinforcement bars 9 maintains a clearance of 20 mm or less with the curved back plate 2 as shown in FIG. If it is excessively wider than this gap, the bonding strength of the backrest reinforcement 9 tends to be lowered.

The tooth adapter 5 is welded to the long shovel 4 as shown in FIG. 1, and the welded part 11 forms a concave bead as shown in FIG. 6, and the welding is performed in the bucket. (1) Starting from the inside and proceeding toward the outer tip of the long shovel (4), the undercut by welding heat did not occur at the tip of the long shovel (4).

Therefore, the tip portion of the long shovel 4 to which the tooth adapter 5 is bonded does not undercut and cracks do not occur in the welded portion, so that the strength is relatively increased.

On the other hand, as shown in Figures 2 and 7, the side plate 3 is bonded to the reinforcing bar to reinforce the rigidity of the side plate 3, the reinforcing bar is the upper reinforcing bar (10a) of the upper side plate (3) And a lower reinforcing bar 10c joined to the lower side plate 3 and a central reinforcing bar 10b joined across the abutment part of the side plate 3 to reinforce the lower rigidity of the side plate.

By the way, the lower reinforcing bar (10c) is the portion where the wear occurs most severely in direct contact with the soil during the excavation work, this lower reinforcing bar (10c) is a wear-resistant steel to increase the wear resistance, while the rest of the reinforcement using the general steel It was.

In the bucket of the present invention having the above-described structure, since the welded portions of the long shovel 4 and the side plate 3 are covered by the protrusions of the long shovel 4, wear due to friction with the soil is reduced, and the side plate 3 has abrasion resistance. The reinforcing bars 10a, 10b, 10c made of steel are joined to increase the strength of the side plate 3, and the gap between the back plate reinforcing bar 9 and the back plate 2 is reduced, so that the soil is deposited in this gap and the back plate reinforcing bar 9 ) Is prevented from decreasing, and undercut and cracks do not occur in the welded portion 11 of the tooth adapter 5, so that the strength of the entire bucket increases.

Claims (3)

(Single correction) The side plates 3 are joined to the left and right sides of the back plate 2, and the side edges 12 are welded to the front ends of the left and right side plates 3, respectively, and a long shovel (to the lower end of the back plate 2). In the bucket of the excavator in which 4) is joined across and a plurality of tooth adapters 5 are welded to each other at predetermined intervals, the tooth adapters 5 are welded to the long shovels 4. The weld 11 is formed to form a concave bead, and is welded to the tip of the long shovel 4 from the inside of the bucket 1, and the long shovel 4 has a side edge such that its tip protrudes outward at both ends of the side blade 12. An abrasion resistant bucket of an excavator, characterized by being welded with 12 The back plate (2) is a plurality of back reinforcing bars (9) made of wear-resistant steel of hardness HB300 ~ HB600 is further bonded in parallel to each other in the transverse direction of the back plate (2) Reinforcing the strength of the wear-resistant bucket of the excavator, characterized in that the clearance between the backrest reinforcement (9) and the backplate (2) to maintain 20mm or less. The upper reinforcing bar 10a is joined to the side plate 3 along the edge thereof, and the central reinforcing bar 10b is joined to the center part in the longitudinal direction, and the edge thereof is attached to the bottom plate 3. The wear-resistant bucket of an excavator characterized by the joining of the lower reinforcing bar (10c) made of wear-resistant steel of hardness HB300 ~ HB600.

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