EP2184403B1 - Device for moving a tool for excavating soil suspended vertically - Google Patents

Device for moving a tool for excavating soil suspended vertically Download PDF

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Publication number
EP2184403B1
EP2184403B1 EP09013142A EP09013142A EP2184403B1 EP 2184403 B1 EP2184403 B1 EP 2184403B1 EP 09013142 A EP09013142 A EP 09013142A EP 09013142 A EP09013142 A EP 09013142A EP 2184403 B1 EP2184403 B1 EP 2184403B1
Authority
EP
European Patent Office
Prior art keywords
fixed
designed
excavating
equipment
tool
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.)
Not-in-force
Application number
EP09013142A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2184403A1 (en
Inventor
Marco Casadei
Alessandro Ditillo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soilmec SpA
Original Assignee
Soilmec SpA
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Publication date
Application filed by Soilmec SpA filed Critical Soilmec SpA
Publication of EP2184403A1 publication Critical patent/EP2184403A1/en
Application granted granted Critical
Publication of EP2184403B1 publication Critical patent/EP2184403B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/22—Component parts
    • 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
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E02F3/3681—Rotators
    • 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
    • E02F3/413—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device

Definitions

  • the present invention relates to the field of earth-drilling and to devices for carrying out drilling operations; in detail, the present invention relates to a device for moving a tool for excavating soil suspended vertically.
  • said digging equipment consists of very heavy structures that are lowered into a digging with block-and-tackle systems acting on a plurality of withholding ropes.
  • one of the problems of said drilling mills consists in the orientation of the drilling mill itself, substantially constituted by a parallelepiped. Said problem is common to all equipment for digging diaphrams.
  • a digging device is described, equipped with a system for orientation or rotation about a vertical axis of a motor-driven type, which requires at least two additional ducts for transmission of hydraulic fluid, which are necessary for enabling operation of said engine.
  • the digging device described therein can moreover incorporate also rotatable passages for piping for conveying debris and for hydraulic operation of digging members, electrical cables for measurements and controls of the direction of digging, and much more still.
  • Said solution is unacceptable for drilling mills of large dimensions, the weight and friction of which cause a stress that cannot be managed by human beings.
  • motor-driven orientation device is affected by the fact that motors are present for movement into an area that is very exposed to external agents, various types of impact, and liquids that can cause failure thereof.
  • the documents DE 15 56 344 A1 and JP 56 048439 A both disclose a device for moving a tool for excavating soil suspended vertically, comprising a first body, fixed to the equipment for supporting said tool, and a second body, which rotates with respect to said first body; the device moreover comprising constraint means, fixed to said second body and designed to fix said device to suspension means.
  • the first body is mobile along a vertical axis with respect to the second body between two end positions.
  • the purpose of the present invention is to provide a device for moving a tool for excavating soil that is suspended vertically that will enable turning of the excavating equipment itself in an initial step of the digging and that will free from the drawbacks illustrated previously.
  • a device for moving a tool for excavating soil suspended vertically, as claimed in the first claim.
  • the equipment for supporting an excavating tool which can consist of a pair of valves or a plurality of drums (not illustrated in so far as it is of a known type), which are arranged in a bottom terminal part of the equipment 1 and which are the first to come into contact with the earth at the start of the drilling step.
  • the excavating equipment 1 has a vertical axis 1a and is equipped with a movement device 3 that enables the equipment 1 and the corresponding excavating tool to turn about its vertical axis 1a when it is outside the digging hanging from a plurality of hoisting ropes or equivalent suspension devices 30.
  • the rotation device 3 comprises a first cylindrical body or drum 3a with vertical axis, which has one or more spiralled, or in any case inclined, grooves 4 arranged on at least part of its lateral surface.
  • the drum 3a is an at least partially hollow body and has an axis of its own substantially coinciding with the vertical axis 1a of the excavating equipment 1.
  • the drum 3a is preferably made of metal material in order to be able to withstand the marked mechanical stresses deriving from the use of the equipment 1.
  • At least one member 5 (such as preferably a pin or key), fixed to a second top body or element 6, having a widened top terminal 6a, on which detents 6b are present for fixing to the suspension devices 30 that are designed to raise or lower the excavating equipment 1 in the hole in the ground.
  • the top terminal 6a has a substantially annular shape with a cylindrical surface and, as illustrated in Figure 1 and 2 , can have a through hole 6c centred on the axis 1a for evacuation of digging fluids.
  • the top element 6 has a diameter, the dimension of which is smaller than the dimension of the inner diameter of the drum 3a in such a way that it can be inserted therein.
  • the desired working positions are in any case to be kept blocked during the operations of digging for obtaining a dig with a constant orientation.
  • the device 3 thus comprises means designed to block said positions and reduce the rate at which the members 5 slide within the grooves 4.
  • the action of release of the braking means 8 is at least temporary during a step of use of the excavating equipment 1.
  • said braking means 8 comprise one or more brake blocks 8a that are arranged on L-shaped side brackets 9, which each have a vertical wall 9a and are equipped with reinforcement walls, which are fixed to the body of the excavating equipment 1 and turn fixedly therewith.
  • the brake blocks 8a act via brake linings on a brake disk 8b fixed to the top element 6 and having a diameter substantially larger than that of the latter.
  • Said brake disk 8b lies in a plane that is orthogonal to the axis 1a.
  • Said side brackets 9, external to the drum 3a, extend substantially in a vertical direction parallel to the axis 1a of the equipment 1, whilst the brake blocks 8a extend therefrom in a direction substantially orthogonal to the aforesaid axis 1a towards an area internal thereto and are mounted on a respective guide 8c in such a way that following upon rototranslation of the top element 6 deriving from the displacement of the members 5 on the inclined grooves 4, they can follow the displacement of the brake disk 8b during its movement along the axis 1a, sliding along its length.
  • Each of the guides 8c is set on a vertical wall 9a of the brackets 9 and extends - in its direction of maximum extension - in a direction substantially parallel to that of the axis 1a.
  • the brake blocks 8a can be fixed to the side brackets 9, and the brake disk 8b can present a grooved coupling between its inner part and the outer part of the element 6 so as to transfer the braking torque and be able to translate vertically and follow the movement of the brake blocks during rototranslation of the excavating equipment 1.
  • the members 5 can slide along the grooves 4 so as to start from a first end 4a of the groove 4 and arrive at the opposite end 4b or, alternatively, be arrested in an intermediate point 4c of the groove 4 following upon intervention of the braking means 8.
  • the excavating equipment 1 can consequently be rotated not only through an angle of rotation corresponding to the difference of position of the members 5 between one end and the other of the groove 4, but also through intermediate angles of rotation.
  • the braking means 8 are constantly activated; namely, they brake the disk 6b, by means of a spring; the braking of the disk 6b ceases when a hydraulic piston (not illustrated) counters the action exerted by the spring on the brake blocks 8a. Consequently, by modulating the pressure of the hydraulic fluid for supplying the piston it is possible to regulate the speed of rotation of the excavating equipment 1 and possibly stop it.
  • the device 3 Since at least one of the two orientations described of the excavating equipment 1 has to be performed with it out of the excavation, the device 3 has to be actuated whilst it is at a distance from the earth sufficient not to cause it to interfere therewith, a distance that is preferably at least 10 m.
  • any remote-control device for operation of the piston for example by means of a manual pump to be connected by means of fast-block couplings to two pipes that run along the frame of the excavating equipment 1 from the device 3 up to a conveniently reachable height, or else by connecting up temporarily to a power source available on the excavating equipment on board the machine or on site, or again through systems of levers that can be operated manually.
  • the braking means 8 may not be present and be replaced by a means for blocking travel of the members 5, for example comprising an end-of-travel screw, designed to block the position of said members, or else it is possible to use pins, keys or shims to fix the mutual position of the drum 3a and of the top element 6.
  • FIG. 3 A second non-binding embodiment of the device 3' is illustrated in Figure 3 .
  • the device 3' has a first body 33 designed to be fixed to excavating equipment or an excavating tool and a second top body or element 36, which can turn with respect to one another and are connected to one another by means of a rotation member preferably of the type constituted by a ballscrew 10.
  • the top element 36 has a plurality of detents 6b for fixing to suspension means (ropes or the like of the same type as the ones 30 illustrated in Figure 1 and 2 ).
  • the ballscrew 10 has an external structure 10a of a substantially cylindrical shape, which is hollow and extends in a direction substantially parallel to the axis 1a.
  • a toothing 11 which extends over part of the lateral surface of the structure 10a extending vertically in a direction substantially parallel to that of the axis 1a.
  • the ballscrew 10 moreover comprises a second inner part 10b, technically referred to as "spiral raceway”, coaxial to the external structure 10a, which is screwed within the latter.
  • the device 3 moreover comprises systems for isolating and protecting the ballscrew 10 from the external environment (said systems are not represented in the figure for simplicity of reading); amongst these there may be present, for example, gaskets, oil scrapers, or other equivalent systems.
  • a braking shaft 22 connected to a respective brake 16 that can be of a hydraulic type or indifferently of some other type (electrical, magnetic, etc.).
  • This embodiment is particularly suited to incorporating a hydraulic swivel joint 12a, designed for passage of some hydraulic supply lines of the excavating equipment.
  • the braking shaft 22 has an axis of its own 22a substantially parallel to the axis 1a and moreover comprises a first, top, terminal part and a second, bottom, terminal part; the top terminal part has a toothing that meshes with the toothing 11, whilst the bottom terminal part is constrained to the brake 16.
  • Both the brake 16 and the braking shafts 22 are mounted on the cylinder 3a, which is rigidly fixed to the excavating equipment; for this reason, the cylinder 3a turns fixedly with the excavating equipment.
  • the device 3' comprises a second shaft 22 connected to-an encoder 18 for establishing precisely an angle of rotation of the excavating equipment and such as to enable precise determination of the position of the excavating equipment 1 also remotely.
  • the body 33 has a first part external to the ballscrew and a second part 34 that extends within the outer structure 10a of the screw until it connects with the inner part 10b of the ballscrew 10.
  • the brake 16 keeps the device 3' blocked until it is released; at this point, the weight of the excavating tool 1, by acting on the inner part 10b of the ballscrew 10 as a load parallel to the axis of rotation thereof, generates a rototranslatory movement of the inner part 10b with respect to the outer part 10a thereof.
  • the spiral raceway 10b of the ballscrew 10 is hence substantially cylindrical and is able to turn with respect to the outer part 10a and is also centred on the axis 1a of the excavating equipment; the inner part 10b is moreover fixed with respect to the inner part 34 of the body 33, and consequently turns fixedly therewith.
  • the inner part 10b and the outer part 10a of the ballscrew 10 is a plurality of spiral-shaped grooves 10c for balls; during rotation, on account of the inclination of the grooves 10c, the inner part 10b of the ballscrew 10, the body 33 (both in its outer part and in its inner part 34), the hydraulic brake 16, and the braking shafts 22 are pushed towards the outside, along the axis 1a, moving away from the top element 36, which is, instead, fixed to the suspension members.
  • the toothing 11 must extend for a length sufficient to guarantee meshing of the toothings of the braking shafts 22 both when the body 33 is completely retracted towards the top element 36 and when the body 33 is instead completely translated in an opposite direction.
  • the toothing 11 is mounted in a removable way on the outer part 10a of the ball screw 10, in such a way that in the case of wear it can be easily replaced.
  • the device 3 moreover comprises rigid hydraulic ducts 17, the purpose of which is to enable passage of hydraulic fluids designed to supply the different loads of the excavating equipment.
  • These hydraulic ducts 17 passing through the component 20 arrive at an inner part 12b of the hydraulic swivel 12a necessary for enabling distribution of hydraulic power to the loads of the excavating equipment that require it.
  • the inner part 12b of the hydraulic swivel, the support 20, and the hydraulic ducts 17 have only translatory motion along the axis 1a.
  • the counter-rotation for these components is guaranteed by one or more cylindrical guide components 14, which are arranged vertically so as to be substantially parallel to the axis 1a and extend above the top element 36.
  • the outer part 12a of the hydraulic swivel can turn together with the excavating tool and thus enables connection of the various hydraulic tubes to the different loads.
  • hydraulic ducts 17 pass within the top element 36 and extend vertically within the cavity of the second part 10b of the ballscrew 10.
  • a rectilinear duct 23 for evacuation of debris having a substantially cylindrical shape and centred on the axis 1a.
  • Said duct is fixed with respect to the inner part 12b of the hydraulic swivel 12a of the device 3'.
  • the duct 23 has only translatory motion and moreover remains guided within a coating duct or sleeve 23a, which is directly connected to a flexible pipe (not represented) for evacuation of the digging fluids.
  • the groove 4 and the contrast elements 4a and 4b described in the first embodiment ( Figures 1 and 2 ) of the present invention are here replaced in this second embodiment by the ballscrew 10, which can be appropriately sized to obtain different performance (angles, helical developments, speed of rotation, etc.).
  • the rotation of the excavating equipment can be in either direction according to whether it is or not resting on the ground.
  • rotation of the excavating equipment 1 takes place by gravity, on account of its weight, and the possible control members inserted in the device 3, 3' are for braking of the travel of rototranslation of the excavating equipment 1 itself.
  • the device in both embodiments, is simple and largely immune from failure given that no rotation motor is necessary to get the device to function.
  • the device described so far enables plenty of free space inside and hence makes it possible to house some accessories that could be useful during digging of the hole in the ground.
  • the grooves can be dismantled in such a way that they can be replaced with others of a different size and/or inclination so as to obtain a different performance seeing that linked to the pitch of the groove are the speed and the loads that are generated in the system.
  • the supporting brackets of the brake blocks illustrated in the first embodiment of the device 3 can be in larger number and arranged radially about the entire circumference of the disk in the case where the dimensions and the weight of the excavating equipment 1 render it necessary.
  • suspension means 30 of the rope type can be replaced for example by a rigid drilling pipe (technically known as "kelly").
  • the device 3, 3' according to the present invention can be suitable for enabling rotation of any equipment that may be used for digging or for carrying out accessory operations in the digging of substantially vertical diaphrams using vertical suspension tools, such as, by way of non-limiting example, buckets or drilling mills.
  • the device 3' might not contain the hydraulic swivel 12a and 12b and/or the passage for excavating debris, constituted by the duct 23.
  • said hydraulic piping and piping for discharging debris are fixed to the lateral ends and do not pass through the central axis of the excavating equipment 1.
  • the point of suspension of the equipment is a simple swivel that does not require internal passages unconstrained in rotation for enabling flow of fluids and/or debris, and consequently enabling a considerable simplification of the entire structure of the device described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
EP09013142A 2008-11-05 2009-10-19 Device for moving a tool for excavating soil suspended vertically Not-in-force EP2184403B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO2008A000815A IT1391620B1 (it) 2008-11-05 2008-11-05 Dispositivo di movimentazione di un utensile di scavo nel terreno verticalmente sospeso.

Publications (2)

Publication Number Publication Date
EP2184403A1 EP2184403A1 (en) 2010-05-12
EP2184403B1 true EP2184403B1 (en) 2011-08-31

Family

ID=41010538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09013142A Not-in-force EP2184403B1 (en) 2008-11-05 2009-10-19 Device for moving a tool for excavating soil suspended vertically

Country Status (3)

Country Link
EP (1) EP2184403B1 (it)
AT (1) ATE522670T1 (it)
IT (1) IT1391620B1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE2230078A1 (en) * 2022-03-18 2023-09-19 Limako Teknik Ab Attachment Module, Excavator Arm, Excavator, and Method of Rotating a Tool relative to Excavator Arm

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1556344A1 (de) * 1968-02-16 1970-02-05 Rolf Dohrendorf Vorrichtung zum Drehen eines Greifers
JPS586022B2 (ja) * 1979-09-27 1983-02-02 武笠 守良 車輛搭載用掘削装置
US4590816A (en) * 1984-01-30 1986-05-27 Weyer Paul P Ball screw actuator
US5267504A (en) * 1990-04-06 1993-12-07 Weyer Paul P Rotary actuator with annular fluid coupling rotatably mounted to shaft
FR2696768B1 (fr) 1992-10-09 1994-11-10 Sol Cie Appareil pour creuser dans le sol des tranchées de grande profondeur à l'aide de tambours de fraisage montés sur un châssis.
US5309816A (en) * 1993-04-27 1994-05-10 Weyer Paul P Rotary actuator with external bearings
FR2752857B1 (fr) 1996-08-28 1998-12-04 Sol Comp Du Appareil pour creuser dans le sol des tranchees de grande profondeur
IT1293888B1 (it) * 1997-04-17 1999-03-11 Soilmec Spa Attrezzatura di scavo a benna per la realizzione di diaframmi
CA2353239A1 (en) * 2001-07-18 2003-01-18 Rotobec Inc. Motor-driven, boom-mounted rotor assembly
SE525043C2 (sv) * 2002-04-02 2004-11-16 Indexator Ab Anordning vid en rotator
ATE437271T1 (de) * 2007-01-26 2009-08-15 Bauer Maschinen Gmbh Bodenabtragsvorrichtung

Also Published As

Publication number Publication date
EP2184403A1 (en) 2010-05-12
ITTO20080815A1 (it) 2010-05-06
IT1391620B1 (it) 2012-01-11
ATE522670T1 (de) 2011-09-15

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