WO2006072322A1

WO2006072322A1 - Improved crusher bucket, particularly for crushing aggregate and similar material

Info

Publication number: WO2006072322A1
Application number: PCT/EP2005/013116
Authority: WO
Inventors: Diego Azzolin; Guido Azzolin
Original assignee: Meccanica Breganzese S.R.L.
Priority date: 2005-01-10
Filing date: 2005-12-07
Publication date: 2006-07-13
Also published as: ITPD20050002A1

Abstract

A crusher bucket (1), in particular for crushing aggregate and similar materials, comprises a casing (2) in which are mounted crushing means (6, 7) for crushing the aggregate, and on which is removably fixed at least one protective plate (12), for protecting the casing (2) from the wear caused by the crushing action.

Description

DESCRIPTION Technical field The present invention relates to ah improved crusher bucket, particularly for crushing inert material, manufacturing waste and demolition materials, hereinafter indicated generally as aggregate, according to the preamble of the main claim. Technological background In the technical field of reference and in particular from the current production of the Applicant, buckets are known which comprise an outer casing, configured for the collection of aggregate, and inside which are mounted crushing means for crushing the collected material.

It is stated that, in this context, the term "bucket" is intended to indicate as a whole any device arranged and intended to be hooked onto the free end of an arm of an operating machine.

The crushing means arranged in the casing typically comprise a pair of jaws facing each other, one movable with respect to the other for compressing and crushing the material present between same. The operation of crushing the aggregate, however, involves general wear of the members in contact therewith. Such wear is particularly evident in the area of the bucket corresponding to the crushing means, since it is precisely in this part that the bucket must encounter the high compression and shearing stresses exerted on the aggregate by the action of the jaws. It follows that, besides the jaws themselves, the sides of the casing situated immediately at the sides of the jaws are also subjected to the intense wearing action of the aggregate being crushed.

In the course of time, this leads to severe deterioration of the casing which, although confined to the sides, may render the bucket as a whole unusable, limiting the service life of same. Description of the invention

The problem underlying the present invention is that of providing an improved crusher bucket, particularly for crushing aggregate and similar materials, and which is structurally and functionally configured so as to remedy the drawbacks mentioned above with reference to the prior art cited.

The problem is solved by the present invention by means of a crusher bucket produced in accordance with the claims which follow. Brief description of the drawings The characteristics and advantages of the invention will become clearer from the detailed description of some preferred exemplary embodiments thereof, described by way of non-limiting example with reference to the appended drawings, in which:

Figure 1 is a frontal perspective view of a bucket produced according to the present invention,

Figure 2 is a view in section and on an enlarged scale of a detail of the bucket of Figure 1,

Figure 3 is a perspective view, on an enlarged scale, of the detail of Figure 2 according to a first alternative embodiment of the bucket of Figure 1, Figure 4 is a view in section and on an enlarged scale of the detail of Figure 2 according to a second alternative embodiment of the bucket of Figure 1. Preferred ways of implementing the invention In the drawings, a crusher bucket produced in accordance with the present invention is indicated as a whole by 1.

The bucket 1 comprises an outer casing 2, generally shovel-shaped, on which are provided attachment means 3 for hooking the bucket 1 onto the free end of an arm of an operating machine (not shown), Defined in the casing 2 are an inlet 4 for the loading of aggregate or other material resembling stone, and an opposed outlet for the discharge of the treated material, following the crushing operation.

Mounted in the casing 2 are means for crushing the aggregate, comprising a movable jaw 6 and an opposed fixed jaw 7, integral with the casing 2.

Removably fixed on the jaws 6 and 7 are suitably grooved plates 8, capable of facilitating the crushing action.

The bucket 1 also comprises moving means, indicated as a whole by 10 and acting on the movable jaw 6 in order to move it away from and towards the fixed jaw 7 according to a suitable trajectory, so as to crush the aggregate present between the jaws.

The moving means may be of any type suitable for the purpose indicated above, and may move the movable jaw 6 according to the most favourable trajectory. Preferably, the moving means are arranged in such a way as to induce in the movable jaw a rotary-translational movement substantially comparable to a masticating type of movement.

The jaws 6 and 7 form inside the bucket 1 a crushing area which is bounded laterally by opposed sides Il of the casing 2.

According to the present invention, on the inner walls of the sides 11 are removably fixed respective protective plates 12, capable of protecting the casing 2 from the wearing action produced by the crushing of the aggregate.

The plates 12 are suitably produced from wear-resistant material, preferably high tensile steel. The plates 12 are fixed to the sides 11 by means of countersunk screws 13 so as to prevent the screws from hindering the flow of the aggregate or from being damaged by same.

Also for the purpose of not hindering the flow of the aggregate to be crushed within the crushing means, connecting means are further provided between the plates 12 and the inner wall of the sides 11, at least at the side facing the inlet 4.

According to the exemplary embodiment shown in Figures 1 and 2, such connecting means comprise a chamfered side 14 of the plates 12.

According to a first alternative embodiment of the invention, shown in Figure 3, in which details analogous to the preceding example are designated by the same numbers, the connecting means instead comprise an angular member 15 fixed, for example by welding, directly onto the inner wall of the sides 11 in touch with the side of plates 12. The dimensions of the angular member will of course be such as to connect the surface of the plates 12 in the best possible manner with the inner wall of the sides 11.

In the exemplary embodiment shown in Figure 4, the plate 12 is received in a seat 16 provided on the sides 11 of the casing 2 in such a way that the inner surfaces of the plates and of the sides 11 are contiguous and coplanar with one another. As in the variant described here, in which the thickness of the plate 12 and of the side 11 is the same, it is possible for the seat 16 to be formed by providing a through opening on the side 11 and by closing same on the outer part of the casing with a backing plate 17. In all the exemplary embodiments described above, a bucket is obtained in which the casing 2, and in particular its sides 11, are protected by removable plates.

In this way the wearing action of the crushing operation will no longer be directed onto the casing 2, but on the contrary will be entirely borne by the plate 12. As soon as the plates have reached a level of wear that is no longer acceptable, they may easily be substituted by other new plates, rendering the bucket 1 operational again.

The invention thus achieves the aims proposed, further providing numerous advantages with respect to the prior art of reference, including significant prolongation of the service life of the crusher bucket.

Claims

C L A I M S

1. An improved crusher bucket, in particular for crushing aggregate and similar materials, comprising a casing (2) in which are mounted crushing means (6, 7) for crushing said aggregate, characterized in that on said casing is removably fixed at least one protective plate (12), for protecting said casing (2) from the wear caused by said crushing operation.

2. A bucket according to claim 1, wherein a pair of protective plates are provided, said plates being fixed to the sides (11) of said casing (2) at said crushing means.

3. A bucket according to one or more of the preceding claims, wherein said at least one plate is made of wear-resistant material.

4. A bucket according to claim 3, wherein said at least one plate is made of high tensile steel.

5. A bucket according to one or more of the preceding claims, wherein an inlet (4) and an outlet (5) for said aggregate are defined in said casing (2) and connecting means are provided between said at least one protective plate (12) and said casing at the side of said plate facing said inlet, so as not to hinder the flow of said material from the inlet to the outlet.

6. A bucket according to claim 5, wherein said connecting means comprise a chamfered side (14) of said plate (12).

7. A bucket according to claim 5, wherein said connecting means comprise an angular member (15) fixed to said casing in touch with said plate.

8. A bucket according to one or more of claims 1 to 4, wherein said at least one plate is received in a seat (16) provided on said casing (2), so as to be flush with the wall of same.

9. A bucket according to one or more of the preceding claims, wherein said at least one protective plate is fixed to said casing by means of countersunk screws (13).