This application is a U.S. National Stage Application of International Patent application PCT/IB2016/054137 filed on Jul. 11, 2016, which claims priority to Italian patent application 102015000032679 filed on Jul. 9, 2015, the contents of both of which are incorporated herein by reference.
The present invention relates to an improved crusher bucket, in particular for crushing inert material, processing waste and demolition material, hereinafter generally referred to as crushed stone, according to the preamble of the main claim.
In the technical field being referred to, there are known buckets which comprise an outer casing which is configured to collect crushed stone and inside which there are mounted crushing means for the collected material.
It may be noted that, in this context, the term “bucket” is intended to be understood generally to indicate any member which is provided for being and intended to be engaged at the free end of an arm of an operating machine.
The crushing means which are provided in the casing typically comprise a pair of jaws which face each other, one movable with respect to the other in order to compress and crush the material present therebetween.
On the basis of one of the known configurations, the bucket comprises a first jaw which is positioned on the base of the bucket and which is connected in a fixed manner to the casing and a second jaw which is connected to a pair of rotatable eccentric shafts.
In this manner, the movable jaw carries out pivoting movements with respect to the fixed jaw, carrying out the crushing of the material which is interposed between the two casings.
The eccentric shafts are fixed to the casing by means of a support structure which is fixed to an upper wall thereof which faces a fixing plate which is intended for connecting the bucket to the arm of the operating machine, as schematically illustrated in
However, those known buckets have the disadvantage of not being capable of withstanding the stresses which are produced by the resistance of the material to be crushed. This may involve significant technical problems in the structure of the crusher bucket.
Therefore, the technical problem addressed by the present invention is to provide a crusher bucket which allows the disadvantages mentioned above to be overcome and which is structurally and functionally configured to overcome the disadvantages set out above with reference to the prior art cited.
That problem is solved by the crusher bucket according to claim 1.
Preferred features of the invention are defined in the dependent claims.
The present invention has some relevant advantages. The main advantage involves the fact that the bucket has a structure which is particularly suitable for withstanding the stresses resulting from the crushing action.
According to preferred aspects, the present invention also allows adjustment of the crushing effect so as both to be able to adapt to the dimensions of the material to be crushed and to be able to adjust the dimensions of the crushed material.
According to another aspect, the invention also relates to a crusher bucket which comprises a casing, in which there is defined an inlet for the material to be crushed and a discharge for the crushed material, a fixed jaw and a movable jaw, which is connected to the casing by means of at least one eccentric shaft, and a protection plate which is connected to the movable jaw in the region of a support element and which is directed towards the inlet opening, in which the protection plate is connected to the support element by means of an attenuation element so as to allow limited movements for the protection plate with respect to the support portion.
On the basis of that aspect of the invention, it is possible to accompany the material in an optimum manner towards the crushing zone which is interposed between the two jaws, thereby contributing to optimization of the crushing of the material.
Other advantages, features and the methods of use of the present invention will become evident from the following detailed description of some embodiments, which are set out by way of non-limiting example. Reference will be made to the Figures of the drawings, in which:
Initially with reference to
The bucket 100 comprises an outer casing 110 which is preferably spoon-shaped and in which there are provided attachments 6 for engaging the bucket 100 at the free end of an arm of an operating machine (not illustrated).
There are defined in the casing 110 an inlet 101 for charging crushed stone or other material to be crushed, typically stone material, and an opposite discharge 102 for discharging the processed material, after the crushing operation, which can better be seen in
There are mounted in the casing 110 elements for crushing the crushed stone, preferably comprising a movable jaw 1 and an opposing fixed jaw 2, which is fixedly joined to the casing 110.
Still with reference to
The bucket 100 further comprises a movement device, which is not illustrated in the Figures and which acts on the movable jaw 1 in order to move it away from and towards the fixed jaw 2 in accordance with a suitable trajectory so as to crush the material present between the jaws.
The movement device preferably comprises a pair of eccentric shafts 3, 4 which are supported directly on the side walls 104 of the casing 110 in a rotatable manner in accordance with methods which will be described in greater detail below. The rotation of the eccentric shafts brings about in the movable jaw 1 a pivoting movement in accordance with a quadrilateral linkage mechanism.
The jaws 1 and 2 define inside the bucket 100 a crushing zone 103, which is laterally delimited by the opposing walls 104 of the casing 110 on which the eccentric shafts 3 and 4 are supported.
Preferably, the eccentric shafts 3, 4 comprise a central portion 3a, 4a and end portions 3b, 4b which are eccentric with respect to the central portion 3a, 4a, which can be seen, for example, in
In one embodiment, the movable jaw 1 is supported on the central portion 3a, 4a and the end portions 3b, 4b are supported on the opposing walls 104 of the casing 110.
Therefore, with reference to
Preferably, the rings 31, 41 are fixed to the outer side of the wall 104 in such a manner that the deformation of the casing 110 is limited and the assembly of the structure is facilitated at the same time.
According to a preferred embodiment, the rings 31, 41 extend peripherally to the respective shafts.
Furthermore, preferably, the movable jaw comprises a support portion 10 by means of which it is connected to the shafts 3 and 4.
According to a preferred embodiment, the central portion of each shaft, which is eccentric with respect to the respective ends, is supported in a rotatable manner by means of a metal tube 17.
According to a preferred embodiment, the bucket according to the present invention further comprises an adjustment device 5 for the distance between the fixed jaw and the movable jaw in the region of the discharge 102.
In the present embodiment, the support portion 10 comprises a first portion 14 and a second portion 12 which are connected to the eccentric shaft 3 and the eccentric shaft 4, respectively.
The plate 11 is connected to one of the two portions, preferably the first portion 14. The first portion and second portion are movable relative to each other and, in particular, the lower base of the second portion 12 can be moved away from a respective abutment surface with respect to the first portion 14.
Preferably, the adjustment device 5 comprises one or more spacers and, in this manner, there can be arranged one or more spacers 51 between the first portion and the second portion, thereby moving the rear portion of the movable jaw away with respect to the rear eccentric shaft 4.
Therefore, the distance between the fixed jaw and the movable jaw is consequently varied, in particular in the region of the discharge 102.
Preferably, there is provided at least one adjustment screw 13, two in the present embodiment, which extend(s) between the first portion and the second portion and is engaged in respective portions so as to adjust the distance thereof.
It is in any case evident that the adjustment screw only serves to adjust the distance, the stresses generated by the crushing of the material being transmitted by means of the spacers and supported by the eccentric shafts 3 and 4.
According to a preferred embodiment, the adjustment screws are rotatably connected to the first portion and are engaged by means of a threaded element in the second portion, or vice versa.
Preferably, there is provided in the wall 104 an opening 52 for the insertion of the spacers 51, as illustrated in
Again with reference to
On the basis of an alternative embodiment which is illustrated in
In this case, the wedge-like member 53 is preferably inserted in the region of a rear portion of the movable jaw 1.
Furthermore, according to a preferred embodiment, the adjustment device further comprises another adjustment screw 15 which is engaged with the wedge-like member 53 and the first portion 14 of the movable jaw 1, respectively. The screw 15 is orientated in the insertion/withdrawal direction of the wedge-like member 53 and allows the position of the wedge-like member to be adjusted in that direction so as to prevent the tightening of the adjustment screw 13 or the stresses produced by the crushing from causing the wedge-like member 53 to be withdrawn.
Another embodiment is illustrated in
In that present embodiment, one of the two eccentric shafts, mainly the rear eccentric shaft 4, that is to say, the one which is nearest the discharge 102, is supported in a movable manner on the casing 110.
In one type of adjustment, the adjustment device 5 comprises a movable support 54 which is fixed in a movable manner to the side walls 104 of the casing 110, to which there is in turn rotatably connected the rear eccentric shaft 4.
Preferably, the movable support 54 comprises a support plate 54a.
In an embodiment, the end portions 3b, 4b are supported on the side walls 104 by means of the movable support 54.
Now also with reference to
In this manner, the position of the eccentric shaft 4 can be varied, moving it towards or away from the fixed jaw 2.
The position of the movable support 54 can be fixed in the desired position.
To that end, the adjustment device 5 further comprises at least one spacer which is or can be arranged between an abutment element 50 which is rigidly connected to the casing 110, preferably in the region of the side walls 104, and the movable support.
It should be noted that the abutment element 50 is preferably arranged above the eccentric shaft 4, thereby allowing adjustment of the upper position, that is to say, the position in the direction moving away with respect to the fixed jaw 2.
The abutment element 50 further extends between the two walls 104, being rigidly fixed thereto, thereby also contributing to maintaining the rigidity of the structure.
According to a preferred embodiment, the movable support 54 comprises an extension 44, which is preferably connected to the plate 54a and which projects laterally with respect to the surface of the plate 41, which allows the provision of a greater abutment surface for the spacers 51.
However, the position of the eccentric shaft 4 is adjusted in the lower region by means of an adjustment element 45, preferably produced by means of an adjustment screw which is engaged in respective portions of the support 54 and the casing 110. Preferably, the adjustment screw engages with the extension 44 itself and with another extension 46 which is connected to the side wall 104.
According to a preferred embodiment, in order to insert one or more spacers 51 between the support 54 and the abutment element 50, there is/are defined at least one through-opening 52 in the side wall 104.
In this manner, by increasing or decreasing the number of spacers 51 which are arranged between the plate and the abutment element 50 and adjusting the position of the adjustment element 45, it is possible to vary the position of the eccentric shaft 4, adjusting the distance d between the fixed jaw 2 and the movable jaw 1, in particular in the region of the discharge 102.
For example,
In any case, it is evident that, alternatively to a greater number of spacers, there could also be selected a spacer having different dimensions, obtaining the same technical effect.
Another aspect of the present invention is illustrated in
The bucket described in those Figures comprises a protection plate 7 which is connected to the movable jaw 1 in the region of a support element 16 and directed towards the inlet 102.
The protection plate 7 is connected to the support element 16 by means of an attenuation element 8 which allows limited movements for the protection plate with respect to the support portion.
For example, the attenuation element 8 is constructed by means of a plurality of cylinders of elastomer material or other material which is partially resilient.
In that embodiment, the protection plate 7 is further connected to the support element 16 by means of a series of screws 81, providing a given play so as not to impede those limited movements which are conferred by the attenuation element 8.
That embodiment further allows simple replacement of the protection plate 7 in the event of wear or damage.
The protection plate 7 is arranged in the region of the inlet 102 and extends as an extension of the movable jaw 7 towards the opening which defines the inlet 102.
In this manner, it is possible to produce an opening having greater dimensions though selecting a jaw having dimensions which are not excessive, given that the front portion of the casing only serves to charge the material, the subsequent crushing zone 103 being provided for the crushing of the material.
The invention thereby achieves the objects set out, further achieving a number of advantages with respect to the prior art involved, including a substantial resistance to the stresses in the crushing steps and a simplicity in terms of the adjustment of the distance between the fixed jaw and movable jaw.
Number | Date | Country | Kind |
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102015000032679 | Jul 2015 | IT | national |
Filing Document | Filing Date | Country | Kind |
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PCT/IB2016/054137 | 7/11/2016 | WO | 00 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO2017/006300 | 1/12/2017 | WO | A |
Number | Name | Date | Kind |
---|---|---|---|
2605051 | Bogie | Jul 1952 | A |
3684332 | Benson | Aug 1972 | A |
4248390 | Toole | Feb 1981 | A |
4382560 | Toole | May 1983 | A |
6015107 | Stegmeier | Jan 2000 | A |
8322643 | Gervais | Dec 2012 | B2 |
10344448 | Azzolin | Jul 2019 | B2 |
20040050987 | Rossi | Mar 2004 | A1 |
20120132739 | Pusheck | May 2012 | A1 |
20150352555 | Svensson | Dec 2015 | A1 |
Number | Date | Country |
---|---|---|
202015003565 | Jun 2015 | DE |
2564929 | Mar 2013 | EP |
H1128373 | Feb 1999 | JP |
H1133420 | Feb 1999 | JP |
579007 | Nov 1977 | SU |
2010103557 | Sep 2010 | WO |
Entry |
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Xcentric Crusher bucket—XC30, XcentricRipper, Mar. 27, 2015, Youtube, https://www.youtube.com/watch?v=QKiea_9t9fw (Year: 2015). |
International Search Report in PCT/IB2016/054137, dated Oct. 18, 2016. |
Written Opinion in PCT/IB2016/054137, dated Oct. 18, 2016. |
Number | Date | Country | |
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20180221885 A1 | Aug 2018 | US |