JP6594063B2 - Drilling bucket - Google Patents

Description

  The present invention relates to a drilling bucket, and more particularly to a bucket that can reduce wear along a liner of a side plate of a bucket body.

  For example, in a hydraulic excavator, an excavation bucket is attached to the tip of an operation arm, and the excavation bucket is operated to excavate earth and sand or scoop and carry earth and sand, gravel, or rock (hereinafter referred to as earth and sand). Usually, the excavation bucket has a box shape in which the bucket body has an opening on the front surface, and a plurality of claws are attached to the lower edge of the opening of the bucket body, and excavation work is performed by striking the claws against the ground. It has become easier.

  By the way, the crossing part of the back plate and the side plate of the bucket body and the back plate are easily worn by rubbing against the earth and sand when scooping the earth and sand.

  When the side plate and the back plate of the bucket body progressed to wear, the area including the worn portion was cut out and a new plate material was fixed there by welding or the like (see Patent Document 1, etc.). Repair work is complicated and skill is required for the work.

  Therefore, a plurality of liners were arranged so as to cover the intersection of the side plate and back plate of the bucket body, and the liners were fixed with bolts, etc., so that the worn runner was replaced when the liner wear progressed. A drilling bucket has been proposed (Patent Document 2).

JP 2002-294739 A JP 09-88111 A

  However, in the structure described in Patent Document 2, although the portion of the bucket body covered with the liner is protected, the upper edge of the side plate side of the plurality of liners has a straight or smooth curved shape. When scooping, there is a problem that the side plate of the bucket body is worn to the shape of the upper end edges of the plurality of liners because it tends to constantly flow along the upper end edges of the plurality of liners on which earth and sand are arranged.

  This invention makes it a subject to provide the excavation bucket which made it possible to reduce the wear along the liner of a bucket main body side plate in view of this problem.

  Therefore, the excavation bucket according to the present invention is an excavation bucket having a bucket main body formed of a back plate and left and right side plates and having an open front surface. The liner includes a liner on the bucket main body and the back plate and side plate of the bucket main body. The upper end edge of the liner on the side of the bucket body side plate is linearly or curvilinearly higher or lower as the liner moves away from the opening of the bucket body, and the opening of the bucket body from the middle. It is characterized by having a whole shape including a partial shape that becomes linearly or curvilinearly lower or higher as it is farther from.

  One of the features of the present invention lies in that the side plate side upper end edge of the liner is made uneven. As a result, the distance along the shape of the upper edge on the side plate side of the liner is longer than the shape that constantly flows, so that earth and sand hardly flows along the upper edge on the side plate side of the liner, It flows apart, that is, unsteady. As a result, the side plate of the bucket body is less likely to wear into the shape of the upper edge of the plurality of liners.

  The overall shape of the upper edge of the liner increases or decreases linearly or curvedly as it moves away from the opening of the bucket body and decreases linearly or curvedly as it moves away from the opening of the bucket body partway It is only necessary to include at least one shape, and for example, a convex triangle or other convex polygon, a concave triangle or other concave polygon, a convex arc or a concave arc, or a combination of these can be employed. .

  The intersection of the back plate and the side plate of the bucket body may be covered with a single liner, but since there is a risk of manufacturing complexity, a plurality of liners, preferably a plurality of liners in a single form, are attached to the bucket body. It is preferable to attach to.

  Concerning the back plate of the bucket body, when the earth and sand flows along the front end edge of the liner, there is a concern that the shape of the front end edge of the liner will be worn like the side plate.

  Therefore, the leading edge of the plurality of liners on the back side of the bucket body also becomes linearly or curvedly higher or lower as the distance from the opening of the bucket body increases, and linearly or curvedly as the distance from the opening of the bucket body from the middle. It is preferable that the overall shape includes at least one partial shape that becomes lower or higher.

  About the back plate of the bucket body, when scooping up earth and sand, it rubs violently with earth and sand and is easily worn. Therefore, it is preferable to fix a belt-like reinforcing plate extending in the width direction on the outer surface of the back plate of the bucket body. In this case, the life of the back plate of the bucket body can be further improved if the both ends of the reinforcing plate in the width direction of the bucket body complement each other with the back plate side tip edges of the plurality of liners.

  In addition, when the thickness of the back plate of the bucket body becomes thin due to wear, the back plate becomes uneven and the user feels uneasy. Therefore, it is preferable to fix a plurality of reinforcing ribs on the back plate in the bucket body so that the back plate does not bend.

It is a schematic perspective view which shows preferable embodiment of the excavation bucket based on this invention. It is a front view which shows the said embodiment. It is a figure which shows the relationship between the back plate of the bucket main body in the said embodiment, and the reinforcement plate 24. FIG. It is a perspective view which shows the liner in the said embodiment. It is a figure for demonstrating the effect | action of the said embodiment.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 5 show a preferred embodiment of a drilling bucket according to the present invention. In the figure, the bucket body 10 is manufactured in a box shape with the back plate 11 and the left and right side plates 12 fixed to each other by welding or the like, and the front surface is opened. The brackets 13 are arranged in parallel to each other and fixed by welding or the like, and two bushes (not shown) are attached to both the mounting brackets 13.

These mounting brackets 13 are aligned with the tip mounting portions of an operating arm (not shown) such as a hydraulic excavator, and a connecting pin (not shown) is press-fitted into the mounting holes and bushes of the tip mounting portion. The excavation bucket is attached to the operation arm.

  A plurality of adapters are arranged at intervals on the lower edge of the opening of the bucket body 10 and are fixed to the bucket body 10 by welding or the like. A claw 14 is fitted into these adapters, and the claw 14 is attached to the lower end edge of the opening of the bucket body 10 in a replaceable manner by inserting a mounting pin into both mounting holes. A shroud 15 is attached between the adjacent claws 14 at the lower edge of the opening of the bucket body 10.

  Three liners 20 are arranged on the bucket body 10 so as to cover the intersection of the back plate 11 and the side plate 12, and are fixed to be exchangeable by bolts. A step portion is formed at the attachment portion of the liner 20 so that the liner 20 is just fitted.

  The liner 20 has an L-shaped side surface, the upper edge of the liner 20 on the side of the side plate 12 of the bucket body 10 is formed in a convex triangle, and the upper edges of the three liners 20 are shown in FIG. As shown in FIG.

  Further, the tip edge of the liner 20 on the back plate 11 side of the bucket body 10 is formed in a concave triangle, and the tip edges of the three liners 20 on the back plate 11 side are arranged side by side as shown in FIG. The shape is a concave triangle.

  On the other hand, an attachment base 22 for attaching a bolt for fixing the liner 20 is fixed to the inner surface of the side plate 12 of the bucket body 10 by welding or the like.

  Further, four belt-like reinforcing plates (reinforcing plates) 24 are arranged on the outer surface of the back plate 11 of the bucket body 10 so as to extend in the width direction of the bucket body 10 between the left and right liners 20 and are welded to the back plate. 11 is fixed. Both ends of the reinforcing plate 24 are formed in a convex triangle that complements the leading edge of the liner 20 on the back plate 11 side.

  Further, a plurality of reinforcing ribs 26 are arranged on the inner surface of the back plate 11 of the bucket body 10 so as to extend in the vertical direction and be parallel to each other, and are fixed by welding or the like.

  Further, a plurality of strip-shaped reinforcing plates 28 are arranged on the inner surface of the back plate 11 of the bucket body 10 so as to extend in the width direction and sandwich the material of the bucket body 10 between the outer plate and the reinforcing plate 24, and are welded. It is fixed by etc.

  When the earth and sand are scooped with the excavation bucket, the side plate 12 of the bucket body 10 rubs against the earth and sand, and particularly near the intersection with the back plate 11 rubs violently with the earth and sand, and the wear is intense. In the bucket, the crossing portion between the side plate 12 and the back plate 11 is covered by the three liners 20, so the liner 20 is worn, but the bucket body 10 is hard to wear. Further, since the liner 20 is bolted to the bucket body 10, the liner 20 may be replaced when the liner 20 wears.

  By the way, while the earth and sand are scooped by the excavation bucket, when the earth and sand constantly flows along the upper edge of the liner 20 on the side plate 12 side and the front edge of the back plate 11 side, the side plate 12 and the back of the bucket body 10 are back. There is a possibility that the shape of the upper end edge and the front end edge of the liner 20 may be worn on the plate 11.

However, since the upper edge of the liner 20 on the side plate 12 side and the tip edge of the back plate 11 side of the liner 20 are triangular in the excavation bucket of this example, earth and sand flow along the upper edge and the tip edge of the three liners 20. As a result, the flowing distance (see curve a in FIG. 5) becomes long, so that the earth and sand are dispersed and flow in other parts of the bucket body 10, and a steady flow is unlikely to occur. 12 and the back plate 11 are less likely to be worn along the shape of the liner 20. As a result, the life of the excavation bucket can be greatly improved.

  Since the reinforcing rib 26 is still provided on the inner surface side of the back plate 11 of the bucket body 20, even if the thickness of the back plate 11 is slightly reduced due to long-term use of the excavation bucket, the user is relieved. A drilling bucket can be used.

10 Bucket body 11 Back plate 12 Side plate 20 Liner 24 Reinforcement plate 26 Reinforcement rib

Claims (4)

In the excavation bucket having a bucket body formed of a back plate and left and right side plates and having a front surface opened,
A plurality of liner in the bucket body (10) (20) is mounted interchangeably over the intersection of the back plate of the bucket body (10) and (11) and the side plate (12), the plurality of liner ( 20) The excavation bucket characterized in that the upper end edge of the bucket main body side plate (12) side is a convex polygon, a concave polygon, a convex arc, a concave arc, or a combination of these. . The plurality of La Inner (20) bucket body back plate (11) side of the distal end edge digging bucket according to claim 1, characterized in that a shape of repeated concave triangle. A belt-like reinforcing plate (24) extends in the width direction and is fixed to the outer surface of the back plate (11) of the bucket body (10), and both end edges of the reinforcing plate (24) are the backs of the plurality of liners (20). The excavation bucket of Claim 2 which has comprised the shape which complements a board (11) side front end edge. The excavation bucket according to claim 1, wherein a plurality of reinforcing ribs (26) are fixed to a back plate (11) in the bucket body (10).

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