GB2401096A - A screening bucket incorporating screening apparatus comprising a plurality of discs mounted on a plurality of rotors - Google Patents

A screening bucket incorporating screening apparatus comprising a plurality of discs mounted on a plurality of rotors Download PDF

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Publication number
GB2401096A
GB2401096A GB0409571A GB0409571A GB2401096A GB 2401096 A GB2401096 A GB 2401096A GB 0409571 A GB0409571 A GB 0409571A GB 0409571 A GB0409571 A GB 0409571A GB 2401096 A GB2401096 A GB 2401096A
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GB
United Kingdom
Prior art keywords
rotors
chain
discs
bucket
screening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0409571A
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GB0409571D0 (en
GB2401096B (en
Inventor
Patrick Mccormick
William Egenton
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB0409571D0 publication Critical patent/GB0409571D0/en
Publication of GB2401096A publication Critical patent/GB2401096A/en
Application granted granted Critical
Publication of GB2401096B publication Critical patent/GB2401096B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
    • B02C18/16—Details
    • B02C18/18—Knives; Mountings thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/12—Apparatus having only parallel elements
    • B07B1/14—Roller screens
    • B07B1/15—Roller screens using corrugated, grooved or ribbed rollers
    • B07B1/155—Roller screens using corrugated, grooved or ribbed rollers the rollers having a star shaped cross section
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/40—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F5/00—Dredgers or soil-shifting machines for special purposes
    • E02F5/22—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling
    • E02F5/223—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling for back-filling
    • E02F5/226—Dredgers or soil-shifting machines for special purposes for making embankments; for back-filling for back-filling with means for processing the soil, e.g. screening belts, separators; Padding machines

Abstract

A screening bucket <B>10</B>, is pivotally connectable to a movable arm of an excavator, comprises a digging edge <B>15</B>, a pair of digging sidewalls <B>20</B> and a screening apparatus <B>25</B> at the back wall <B>28</B> of the bucket. The screening apparatus comprises a plurality of substantially parallel rotors <B>35</B> with axially spaced discs <B>25</B> mounted thereon. Each of the discs <B>25</B> is provided with at least one radially projecting arm <B>42</B> operable to crush against the material delivered into the screening bucket <B>10</B>. Spaces are provided between adjacent discs <B>40</B> so that the crushed material can pass through the spaces. The rotors <B>35</B> may be driven with a single chain which may encompass the rotors <B>35</B> in a manner enabling rotation of the rotors <B>35</B> in the same direction. Alternatively, the chain may engage opposite sides of adjacent rotors <B>35</B> enabling rotation of the rotors in alternating directions. The chain may be with a tightening device for adjusting the tension of the chain on the rotors <B>35</B>.

Description

A SCREENING BUCKET
The present invention relates to a screening bucket, i.e. a bucket which can handle material and screen the material.
The present invention provides a screening bucket pivotally connectable to a movable arm of an excavator, the screening bucket comprising a digging means at the mouth of the bucket and a pair of digging sidewalls, the digging means being suitable to dig material such as compacted earth, soil, clay or stone directly into the bucket, the screening bucket further comprising a screening apparatus at the back wall of the bucket, said screening apparatus comprising a plurality of substantially parallel rotors, the rotors being operable to be driven by a motor, wherein axially spaced discs are mounted on a rotor, the discs being provided with at least one radially projecting arm, the arm being suitable to crush against the material delivered into the screening bucket, and wherein spaces are provided between adjacent discs so that the crushed material can pass between them and wherein the design of the screening apparatus and the spacing of the rotors, discs or arms lend to material not being thrown out of the bucket during screening.
Advantageously, the screening bucket comprises two side plates, at least one top plate and at least one bottom plate, and wherein the side edges of the top plate, the side edges of the bottom plate and respective locations of the side plates are provided with inter- engageable elements for pre-securing the top plate, the bottom plate and the side plates together thereby assisting the manufacturing process of the screening bucket at an intermediate stage thereof.
Ideally, the rotors are driven by a single chain drive mechanism, the chain of which is suitable to engage with the rotors in a manner enabling the rotors to rotate in the same direction, and alternatively wherein the chain is suitable to be engaged with the rotors in a manner enabling contra-rotation of two adjacent rotors.
Conveniently, the chain of the single chain drive is provided with at least one tightening device operable to adjust the tension of the chain when the chain is engaged with the rotors.
Advantageously, the discs may be in a form of cam discs, or alternatively, in a form of fixed centre discs.
Conveniently, the radially projecting arms may be in a form of removable and adjustable teeth held in cleat elements, the cleat elements being mounted between two adjacent discs, and the removable and adjustable teeth may be fixed in the cleat elements by bolts.
Alternatively, the radially projecting arms may be formed integrally with the discs.
The discs of a pair of adjacent rotors may be positioned in a staggered manner on the pair of rotors, and the radially projecting arms may extend into spaces between two respective adjacent discs of the other rotor.
Optionally, two radially projecting arms may be provided for each disc, the arms projecting in opposite directions, one of the two arms being shorter and wider than the other of the two arms. These discs may be mounted on a rotor in a helical manner so that that equal points of the discs on the rotor form a helix, the helix having a maximum pitch equal the distance between the temminus discs of the rotor.
The invention will hereinafter be now described with reference to the accompanying drawings which show by way of example only, one embodiment of a screening bucket according to the invention.
In the drawings: Figure 1 is a perspective view of the screening bucket; Figure 2 is a cross-sectional side view of the screening bucket; Figure 3 is cross-sectional plan view of the screening bucket; Figure 4 is perspective view of one set of rotatable discs forming part of the screening apparatus; and Figure 5 is a side view of one set of rotatable discs of Figure 4 Figure 6 is a perspective view of the screening bucket with digging fingers attached.
Figure 7 is an exploded view of the bucket of Figure 6 showing interengageable elements of the top plate, the bottom plate and the side plates of the bucket.
Figure 8 is a perspective view of a protective barrier of the screening apparatus.
Figure 9 is a plan schematic view of the rotors of the screening apparatus, the chain and three chain tightening means.
Figure 10 is a schematic illustration of the chain and rotors in a contrarotational mode of operation.
Figure 11 is a perspective schematic illustration of the chain tightening means.
Figure 12 is a perspective view of another set of rotatable discs with projecting arms incorporated there-between.
Figure 13 is a plan view of an alternative disc of the screening apparatus in accordance with the invention.
Figure 14 is a perspective schematic view of a set of the discs of Figure 13 assembled on a rotor.
Referring to the drawings, screening bucket 10 comprises a toughened digging edge 15 and a pair of digging sidewalls 20, a screening apparatus 25 at the back wall 28 of the bucket and a pair of flanges 30 by which the bucket can be connected to the digging arm of an excavator (not shown) . Toughened digging tines or fingers 1 5a can be attached to the digging edge 15 and sidewalls 20 (as shown in Figure 6), if necessary.
The screening apparatus 25 comprises six parallel mounted rotatable rotors 35 driven by hydraulic motors 36. Each of the rotors 35 comprises nine fixed centre discs 40 each of which has four flails 42 (see Figure 5 and Figure 4) which are used to break up compacted clay, soil or other material delivered into the bucket. A single greasing system is provided for the apparatus 25. The discs are readily replaceable if damaged.
Although not shown in the drawings, the bucket can be modified so that the discs can be offset by means of a cam type arrangement or the rotors can be eccentrically mounted in order to enhance the flail effect of the arms, if the bucket is used for handling stone.
The rotors 35 are easily accessible and replaceable as they are externally fitted. The hydraulic motors 36 are internally mounted, do not interfere with the digging function of the bucket, are easy to service and are not exposed to the elements.
The material broken by the rotating discs and arms or flails 42 falls through a protective barrier 50 (see also Figure 8) at the back wall 28 of the bucket so as to fall onto a stockpile of screened material. 15;
As shown in Figures 6 and 7 the screening apparatus 10 further comprises top plates 21 and 21a and bottom plates 22 and 22'. Side edges of the top plates 21 and 21a are provided with tongues 21a and 21'a respectively. The tongues 21a and 21'a are engageable with respective slots 22a and 22'a of the side plates 20. The tongues 22a and 22'a are engageable with respective slots 20b and 20'b of the side plates 20. The presence of the inter-engageable tongues and slots is useful for pre-securing the top plates before welding thereby assisting the manufacturing process of the screening bucket.
The rotors 35 of the screening apparatus are driven by the motors 36 via a single chain 60. The chain 60 is suitable to encompass the rotors 35 in a manner enabling rotation of the rotors 35 in the same direction, as shown in Figure 9. Alternatively, the chain 60 is also suitable to engage opposite sides of adjacent rotors 35 enabling rotation of the rotors in alternating directions, as shown in Figure 10.
For a mono-directional mode of operation a tightening device 65, schematically shown in Figure 11, is provided for the chain 60. The tightening device comprises two rods 66 and a nut 68. Each rod 66 comprises a chain engageab,e head 67 and a threaded end 69 suitable for coupling with one of the two opposing threaded apertures 68a of the nut 68.
In use, when the chain encompasses the rotors 35, the tightening device 65 extends between two opposing locations on the chain 60 (as in Figure 9) . Rotating the nut 68 in one direction results in the rods 66 extend outwardly thereby increasing the chain tension.
Rotating the nut 68 in the opposite direction results in the rods 66 retracting towards the nut 68 thereby reducing the chain tension.
Figure 12 illustrates another configuration of the discs and arms of the screening apparatus. In this embodiment cleats 43 are mounted in the spaces between circular discs 44. Radially projecting teeth 45 are held in the cleats 43 and fixed therein by means of bolts (not shown). The teeth 45 are particularly suitable for handling rock and stone.
A further alternative disc is shown in Figure 13. Each disc 46 comprises two radially projecting arms 47 and 48. The design of the discs 46 is such that the arm 47 is shorter and wider than the arm 48. Such design of the discs is particularly suitable for handling clay. The discs 46 are preferably mounted on the rotor 35 in a helical manner so that equal points of the discs of the rotor form a helix, the helix having a maximum pitch equal; the distance between the terminus discs of the rotor.
It is to be understood that the invention is not limited to the specific details described herein which are given by way of example only, and that various modifications and alterations are possible without departing from the scope of the invention as defined in the appended claims.

Claims (17)

  1. CLAIMS: 1. A screening bucket pivotally connectable to a movable arm of an
    excavator, the screening bucket comprising a digging means at the mouth of the bucket and a pair of digging sidewalls, the digging means being suitable to dig material such as compacted earth, soil, clay or stone directly into the bucket, the screening bucket further comprising a screening apparatus at the back wall of the bucket, said screening apparatus comprising a plurality of substantially parallel rotors, the rotors being operable to be driven by a motor, wherein axially spaced discs are mounted on a rotor, the discs being provided with at least one radially projecting arm, the arm being suitable to crush against the material delivered into the screening bucket, and wherein spaces are provided between adjacent discs so that the crushed material can pass between them and wherein the design of the screening apparatus and the spacing of the rotors, discs or arms lend to material not being thrown out of the bucket during 1 5 screening.
  2. 2. A screening bucket as claimed in Claim 1, wherein the screening bucket comprises two side plates, at least one top plate and at least one bottom plate, and wherein the side edges of the top plate, the side edges of the bottom plate and respective locations of the side plates are provided with inter-engageable elements for pre-securing the top plate, the bottom plate and the side plates together thereby assisting the manufacturing process of the screening bucket at an intermediate stage thereof.
  3. 3. A screening bucket as claimed in Claim 2, wherein the inter-engageable elements are in a form of tongues provided at the side edges of the top plate and at the side edges of the bottom plate and matching slots provided at the respective locations of the side plates.
  4. 4. A screening bucket as claimed in any one of the preceding claims, wherein an external barrier is provided at the back wall of the screening bucket.
  5. 5. A screening bucket as claimed in any one of the preceding claims, wherein the rotors are driven by a single chain drive mechanism, the chain of which being suitable to engage with the rotors in a manner enabling the rotors to rotate in the same direction, and alternatively wherein the chain being suitable to be engaged with the rotors in a manner enabling contra-rotation of two adjacent rotors.
  6. 6. A screening bucket as claimed in any one of the preceding claims, wherein the chain of the single chain drive is provided with at least one tightening device operable to adjust the tension of the chain when the chain is engaged with the rotors.
  7. 7. A screening bucket as claimed in Claim 6, wherein the tightening device is in a form of an extendable cross-bar extending between two opposing locations on the chain when the chain is engaged with the rotors, the cross bar having a first and a second end, the first and the second ends being engageable with the chain of the chain drive, and the cross- bar having a biasing means operable to bias the first and the second ends against at least two opposing locations on the chain whilst extending the cross bar thereby adjusting the chain tension.
  8. 8. A screening bucket as claimed in Claim 7, wherein the cross-bar comprises a first rod and a second rod, each rod having and threaded end and a chain engageable end, the threaded ends of the rods being coupled with corresponding substantially co-axial threaded apertures of a nut so that rotating the nut in one direction results in the chain engageable ends of the rods biasing against the opposing locations on the chain and increasing the tension of the chain, and rotating the nut in the opposite direction results in the rods retracting towards the nut thereby reducing the tension of the chain.
  9. 9. A screening bucket as claimed in any one of the preceding claims, wherein the discs are in a form of cam discs.
  10. 10. A screening bucket as claimed in any one of Claim 1 to Claim 8 wherein the discs are in a form of fixed centre discs.
  11. 11. A screening bucket as claimed in any one of the preceding claims, wherein the radially projecting arms are in a form of removable and adjustable teeth held in cleat elements, the cleat elements being mounted between two adjacent discs, and the removable and adjustable teeth being fixed in the cleat elements by bolts.
  12. 12. A screening bucket as claimed in any one of Claim 1 to Claim 10, wherein the radially projecting arms are formed integrally with the discs.
  13. 13. A screening bucket as claimed in any one of Claim 1 to Claim 10, wherein the discs of a pair of adjacent rotors are positioned in a staggered manner on the pair of rotors.
  14. 14. A screening bucket as claimed in Claim 13, wherein the radially projecting arms extend into spaces between two respective adjacent discs of the other rotor. ;
  15. 15. A screening bucket as claimed in any one of Claim 1 to Claim 10 and any one of Claim 12 to Claim 14, wherein two radially projecting arms are provided for each disc, the amms projecting in opposite directions, one of the two arms being shorter and wider than the other of the two arms.
  16. 16. A screening bucket as claimed in Claim 15, wherein the discs are mounted on a rotor in a helical manner so that that equal points of the discs on the rotor form a helix, the helix having a maximum pitch equal the distance between the terminus discs of the rotor
  17. 17. A screening bucket substantially in accordance with any of the embodiments as herein described with reference to and as shown in the accompanying drawings
GB0409571A 2003-04-29 2004-04-29 A screening bucket Expired - Fee Related GB2401096B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IE20030324 2003-04-29
IE20030328 2003-04-30

Publications (3)

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GB0409571D0 GB0409571D0 (en) 2004-06-02
GB2401096A true GB2401096A (en) 2004-11-03
GB2401096B GB2401096B (en) 2006-09-06

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IE (1) IES20040305A2 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006097179A2 (en) * 2005-03-14 2006-09-21 Schenk Juergen Universal unit and attachment classifier
US7591379B2 (en) 2002-05-31 2009-09-22 Sam Dominic Seaton Turnbull Screen/mixer
NL1033853C2 (en) * 2006-05-15 2009-11-17 Ramtec Oy Sieve loading shovel and power transmission module for a sieving loading shovel.
EP2204501A1 (en) * 2008-12-30 2010-07-07 Allu Finland Oy A screening, crushing or mixing bucket
US7913430B2 (en) 2009-07-14 2011-03-29 Allu Finland Oy Screening, crushing or mixing bucket
US8074914B2 (en) 2009-03-24 2011-12-13 Allu Finland Oy Crushing bucket
US9199243B2 (en) 2010-08-30 2015-12-01 Ecomeca Oy Method and apparatus for crushing mineral material
ITUA20162471A1 (en) * 2016-04-11 2017-10-11 Valli S P A Screening and disintegration group, disintegrating element and method
CN110607813A (en) * 2019-09-06 2019-12-24 徐州金港起重机制造有限公司 Multifunctional bulldozer
WO2022127993A1 (en) * 2020-12-15 2022-06-23 Schnelting, Mathias Separator bucket and screen device
WO2023152249A1 (en) * 2022-02-11 2023-08-17 Lmk Energy Device for discharging loose material and biomass torrefaction apparatus provided with such a discharging device

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Publication number Priority date Publication date Assignee Title
US5619811A (en) * 1992-06-23 1997-04-15 Yrjoelae; Mikko Bucket equipped with grinding and loosening device
US5887810A (en) * 1997-09-22 1999-03-30 Maruyama Corporation Crusher of chunks of concrete or masonry
WO1999044758A1 (en) * 1998-03-05 1999-09-10 Misu Pty Ltd. Screening apparatus
CA2247715A1 (en) * 1998-06-18 2000-03-18 Markku Jonninen A screen crusher for soil, waste or manure materials
JP2000319922A (en) * 1999-05-07 2000-11-21 Hiroshi Onodera Bucket for sieving work
US6237865B1 (en) * 1998-06-20 2001-05-29 Neuenhauser Maschinenbau Gmbh & Co. Kg Apparatus for screening and/or crushing screen materials

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Publication number Priority date Publication date Assignee Title
WO1990005813A1 (en) * 1988-11-21 1990-05-31 Bowville Pty. Ltd. Excavator bucket

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5619811A (en) * 1992-06-23 1997-04-15 Yrjoelae; Mikko Bucket equipped with grinding and loosening device
US5887810A (en) * 1997-09-22 1999-03-30 Maruyama Corporation Crusher of chunks of concrete or masonry
WO1999044758A1 (en) * 1998-03-05 1999-09-10 Misu Pty Ltd. Screening apparatus
CA2247715A1 (en) * 1998-06-18 2000-03-18 Markku Jonninen A screen crusher for soil, waste or manure materials
US6237865B1 (en) * 1998-06-20 2001-05-29 Neuenhauser Maschinenbau Gmbh & Co. Kg Apparatus for screening and/or crushing screen materials
JP2000319922A (en) * 1999-05-07 2000-11-21 Hiroshi Onodera Bucket for sieving work

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7591379B2 (en) 2002-05-31 2009-09-22 Sam Dominic Seaton Turnbull Screen/mixer
WO2006097179A2 (en) * 2005-03-14 2006-09-21 Schenk Juergen Universal unit and attachment classifier
WO2006097179A3 (en) * 2005-03-14 2006-12-07 Juergen Schenk Universal unit and attachment classifier
NL1033853C2 (en) * 2006-05-15 2009-11-17 Ramtec Oy Sieve loading shovel and power transmission module for a sieving loading shovel.
US7954263B2 (en) 2008-12-30 2011-06-07 Allu Finland Oy Screening, crushing or mixing bucket
EP2204501A1 (en) * 2008-12-30 2010-07-07 Allu Finland Oy A screening, crushing or mixing bucket
US8074914B2 (en) 2009-03-24 2011-12-13 Allu Finland Oy Crushing bucket
RU2526662C2 (en) * 2009-03-24 2014-08-27 Аллу Финлэнд ОИ Crushing bucket
US7913430B2 (en) 2009-07-14 2011-03-29 Allu Finland Oy Screening, crushing or mixing bucket
US9199243B2 (en) 2010-08-30 2015-12-01 Ecomeca Oy Method and apparatus for crushing mineral material
ITUA20162471A1 (en) * 2016-04-11 2017-10-11 Valli S P A Screening and disintegration group, disintegrating element and method
CN110607813A (en) * 2019-09-06 2019-12-24 徐州金港起重机制造有限公司 Multifunctional bulldozer
WO2022127993A1 (en) * 2020-12-15 2022-06-23 Schnelting, Mathias Separator bucket and screen device
WO2023152249A1 (en) * 2022-02-11 2023-08-17 Lmk Energy Device for discharging loose material and biomass torrefaction apparatus provided with such a discharging device
FR3132652A1 (en) * 2022-02-11 2023-08-18 Lmk Energy Device for unloading a bulk material and installation for roasting biomass provided with such an unloading device

Also Published As

Publication number Publication date
IES20040305A2 (en) 2004-11-03
GB0409571D0 (en) 2004-06-02
GB2401096B (en) 2006-09-06

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