EP0114584B1 - Chain cutter excavator - Google Patents
Chain cutter excavator Download PDFInfo
- Publication number
- EP0114584B1 EP0114584B1 EP83830282A EP83830282A EP0114584B1 EP 0114584 B1 EP0114584 B1 EP 0114584B1 EP 83830282 A EP83830282 A EP 83830282A EP 83830282 A EP83830282 A EP 83830282A EP 0114584 B1 EP0114584 B1 EP 0114584B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chain
- tools
- excavation
- excavator
- attack
- 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.)
- Expired
Links
- 238000009412 basement excavation Methods 0.000 claims description 32
- 230000033001 locomotion Effects 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/13—Foundation slots or slits; Implements for making these slots or slits
-
- 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
- E02F3/88—Dredgers; Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g. suction dredgers
- E02F3/90—Component parts, e.g. arrangement or adaptation of pumps
- E02F3/92—Digging elements, e.g. suction heads
- E02F3/9212—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel
- E02F3/9225—Mechanical digging means, e.g. suction wheels, i.e. wheel with a suction inlet attached behind the wheel with rotating cutting elements
- E02F3/9237—Suction wheels with axis of rotation in transverse direction of the longitudinal axis of the suction pipe
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/02—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches
- E02F5/06—Dredgers or soil-shifting machines for special purposes for digging trenches or ditches with digging elements mounted on an endless chain
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B11/00—Other drilling tools
- E21B11/06—Other drilling tools with driven cutting chains or similarly driven tools
Description
- This invention concerns a chain cutter excavator. To be more exact, the invention concerns a chain cutter excavator able to dig ditches, trenches, wells, excavations for partition walls or other kinds of excavations according to the precharacterizing part of claim 1; moreover, the excavator of the invention can work on and in any kind of ground, thereby augmenting its versatility.
- Chain cutter excavators are known which have tools rotatable with a vertical axis. These types of excavators entail many drawbacks such as:
- - considerable sideways bulk,
- - limited capacity and speed of penetration,
- - considerable wear of their parts and
- - complex maintenance.
- Chain cutter excavators are also known which have tools rotatable with a horizontal axis.
- US 3,710,878, for instance, is known and describes a chain cutter excavator equipped with tools rotatable with a horizontal axis, the tools being lodged at the end of a box-shaped head. These rotatable tools are powered with chain means having two consecutive branches. These chain means take their motion from as many synchronized motor means through a transmission of gear wheels.
- The final branch of each chain means has means to attack the earth, such as teeth or other means, which cooperate with like means provided on the periphery of the rotatable tools. Pneumatic means to remove debris are also included.
- The aforesaid mechanical synchronization does not permit adaptation of the speeds of the individual tools and therefore does not enable the vertical nature of the excavation to be corrected.
- Another and greater shortcoming of this US patent 3,710,878 lies in the fact that the excavation face is not continuous. In fact, in the space between the two rotatable tools there is a dead zone in which the ground is attacked by a wedge means or blade means without any action in that zone by the means for attacking the ground.
- The invention lends itself, therefore, to excavation in friable earth or not very consistent ground but is not suitable for employment in rocky and compact ground.
- Moreover, the rotatable tools do not work laterally to the head, and blade means to improve the excavation which are able to be lowered with jacks are provided so as to trim the walls of the excavation itself. In rocky or compact ground these blade means provide just a fancy demonstration without any practical benefit, so that, as soon as compact or rocky ground is reached, the excavation cannot progress because these blades form a hindrance.
- Moreover, means are not provided for resilient suspension of the rotatable tools, such suspension means being able to compensate for variations of load on the individual tools owing to variability in local consistency of the ground.
- A further drawback of this invention lies in the difficulty encountered in adjusting and setting the chain means, which are embodied in two successive sections.
- Patent US-A-3,894,587 is also known and discloses a chain cutter excavator with tools rotatable with a horizontal axis. This invention envisages a direct drive of the rotatable tools, which cooperate as far as their periphery.
- The motors therefore have to be located on the same axis as the said rotatable tools.
- Such a lay-out arranges for the cutter tools to be supported at one end on the drive axles, and this entails a considerable overall size in the direction axial to the motors and a dangerous mechanical stress on the supports (referenced with 6 in this patent) and on the motors themselves.
- Moreover, owing to the presence of these supports there is the difficulty, or impossibility, of obtaining a continuous excavation face since there is a dead space corresponding with the support of each motor, and this dead space cannot be reduced beyond a given limit depending on the mechanical strength of such supports.
- Also known are the methods of attacking ground comprising rocky strata, the use of scoop or shovel buckets being alternated for the soft strata and cutter tools being used for the rocky strata.
- This involves the need to make use of different machines when the ground changes, and also the need to remove separately the hard material crushed by the cutter tools.
- Working, therefore, takes a long time and is not economical and in any event is costly.
- Our invention has the purpose of providing a chain cutter excavator able to eliminate the foregoing drawbacks and shortcomings, which are all inherent in the known art.
- One purpose of the invention is to provide a chain cutter excavator of a modest overall size and suitable for attacking the ground and for working along the whole width of the excavation face, thereby making possible very great forward movements in depth in ground of any nature and consistency.
- A further purpose of the invention is to provide a chain cutter excavator equipped with means for continuous withdrawal of debris as the digging goes forward.
- Yet another purpose of the invention is to provide motor means having a high motive torque and high power but to keep the overall size of the excavator very small.
- It is also wished to obtain by means of the invention an optimum distribution of load among the various cutter tools when more than one in number if any lack of uniformity in the consistency of the areas of ground attacked by the various tools is found.
- These purposes and others which will become clearfrom the description and examples given are achieved according to the invention by envisaging a head equipped with excavation means consisting of one or more tools rotatable around a horizontal axis.
- Said tools are driven indirectly by hydraulic motors located above the tools.
- The invention envisages advantageously a chain transmission between each motor and the relative tool. Said chain bears on its outer side suitable means for attacking the ground.
- Like attacking means are solidly fixed on the periphery of said rotatable tools driven by the chain.
- The kind of lay-out adopted for the rotatable means and, in particular, the drive of the rotatable tools by a chain which itself is equipped with means to attack the ground, enables said means attacking the ground to be arranged advantageously in such a way as to form a continuous excavation face free of dead spaces and having a size the same as or slightly greater than the overall thickness of the bucket.
- This enables material to be removed regularly and particularly efficiently.
- The attacking means may consist of a plurality of suitably arranged and oriented teeth or projections. The teeth will be predisposed advantageously so that they can be replaced when broken or worn.
- According to the invention the hydraulic motors have an immovable axle and a rotatable casing. A toothed ring which actuates the relative chain together with the attacking means is fixed solidly to the casing of each motor.
- This particular construction enables a very small thickness of the head of the chain cutter excavator to be obtained; it also makes it possible to lessen advantageously the number of movable parts and also to obtain a particularly strong assemblage.
- The invention envisages advantageously that the toothed wheels at the end are fitted in an elastic, damped manner. In this way an excellent distribution of the load can be achieved when the excavator comprises more than one rotatable tool.
- Indeed, when diverse tools are attacking zones of material of differing compactness, the tool which attacks the most compact material meets with a greater resistance to its forward movement and loads the elastic means positioned between itself and the head.
- As a result, by means of said elastic means the greater part of the vertical load weighs on the tool which needs it most, namely the tool which is working on the most compact material.
- The tool which is biting into the least compact material continues to advance without rotating in an empty space, whereas the other tool makes up the difference in forward movement owing to the effect of the greater load applied to it.
- Furthermore, the elastic means, with the help of the damping means, absorb at least partially the stresses coming from the rotatable tools and loading the remainder of the structure.
- The invention also envisages pneumatic means which withdraw continuously the debris being produced.
- The whole assemblage is installed in a working head of a much reduced thickness.
- The invention is therefore embodied with a chain cutter excavator able to work in any kind of ground and make ditches, trenches, wells, excavations for partition walls, etc., which comprises:
- - two excavation means having their axes parallel to each other and substantially parallel to the excavation face, such means being equipped peripherally with means to attack the earth,
- - hydraulic motor means arranged above such excavation means,
- - chain means driven by the hydraulic motor means and driving the excavation means, such chain means being provided with independent means to attack the earth, and
- - pneumatic means to withdraw debris, the chain cutter excavator being characterized in that:
- - each said excavation means consists of a pair of rotatable tools provided centrally with an inner gear wheel,
- - said hydraulic motor means comprise on their outer periphery ring gear means to drive said chain means, and to give motion to the inner gear wheel of each pair of rotatable tools,
- - said means to attack the earth of one pair of tools pass tangentially in the vicinity of the means to attack the earth of the other pair of tools, and that the means to attack the earth, supported by the chain means and by the rotatable tools, form a substantially continuous excavation face having a section which coincides at least with the greatest section, normal to the axis, of the excavator head.
- We shall describe hereinafter, as a non-restrictive example, a preferred embodiment of the invention with the help of the attached tables, wherein:
- Figs. 1 give two partly cutaway views of the excavator of the invention;
- Figs. 2 show two views of the pneumatic system to withdraw debris;
- Figs. 3 show a detail of said system.
- In the figures the chain cutter excavator of the invention bears the
reference number 10. Saidexcavator 10 comprises ahead 11 with an outer shape substantially like a box without a bottom from the lower side of which the excavation means 12 jut out. - The
head 11 has the task of bearing and protecting the inside parts and is connected at its upper end to ashaft 111, which can be, for instance, telescopic and be borne by a self- propelled means, which is not shown here. - The methods of suspending and thrusting the
excavator 10 form part of the prior art. - The excavation means 12 in our example consist of a pair of
rotating tools 13, but saidtools 13 according to the invention can be included in another number albeit advantageously in contrarotatable pairs. In the example shown therotatable tools 13 are contrarotatable, the purpose being to obtain not only a symmetry of the forces but also the drawing of the crushed material to amiddle aspiration zone 14 located between thetools 13 themselves. - In our example each of the
rotatable tools 13 consists of an innertoothed wheel 15 coaxial with and solidly fixed to twoouter wheels 16, one on each side. The innertoothed wheel 15 is supported by afork 17. - The
fork 17 is positioned centrally in relation to each pair ofrotatable tools 13 and contains in its centre theinner gear wheel 15. Moreover, thefork 17 is fitted resiliently in relation to thehead 11, for spring means 18, damper means 19 and means 39 to guide the lengthwise sliding of thefork 17 are interposed. - A
hydraulic motor 20 is located above eachtoothed wheel 15. Saidhydraulic motors 20 are advantageously disposed with theirmotive axle 21 immovable and with theircasing 22 rotating. Atoothed crown 23 is located on the periphery of thecasing 22. - This particular construction of the
motor 20/toothed crown 23 group makes possible a very small overall axial size of said group, as can be seen in Fig. 1 b. - The
toothed crown 23 draws with achain 25 thetoothed wheel 15 and therewith theouter wheels 16 solidly fixed to the latter 15. - Both the
wheels 16 and thechain 25 bear on their periphery means 26 for attacking the ground, said means 26 consisting of a plurality of suitably fixed and orientedteeth 126 in our example. - It remains within the spirit of the invention if toothings differentiated to suit the specific usages are envisaged and if the toothing on the
chain 25 is envisaged as being different from that on thewheels 16. - Fig. 1 shows clearly how the lay-out of the mechanical organs according to the invention and, in particular, the positioning of the
motors 20 higher than therotatable tools 13, and thechain transmission 25, which itself bears means to attack the ground, enable anexcavation face 24 free of dead spaces to be obtained. - The diameter of the
wheel 15 as compared to that of thewheels 16 is selected advantageously in such a way as to form anexcavation face 24 suitably shaped like an inverted V (see Fig. 1 b). This arrangement ensures that the crushed material is drawn towards the centre line of thetool 13 and thereafter towards theaspiration zone 14. - Blade means 27 are interposed between the two contrarotatabletools 13 and contribute to a further crushing of the debris in our example.
- Means 28 to withdraw debris, being pneumatic means in our example, are comprised in the middle of the
head 11. Said means 28 include awithdrawal pipe 29 in this instance. - Said pipe 29 (see Figs. 2) has a squashed
end portion 129 which terminates in anaspiration intake 30. - Means 31 to deliver compressed air consist, in our example, of two
pipes 32 positioned at the sides of thewithdrawal pipe 29. Saidpipes 32 are connected above to a supply ofcompressed air 33 or of another fluid under pressure. - Each
pipe 32 widens at itslower part 132, which is superimposed at the side of theend portion 129 of thewithdrawal pipe 29. - Nozzle means 34 positioned in the end zone of the
lower part 132 of eachpipe 32 near theintake 30 produce a flow of air directed upwards within thewithdrawal pipe 29. This layout has the effect of drawing and aspirating the debris within saidpipe 29, which opens out suitably outside thebucket 10. - Figs. 3 show a detail of the nozzle means 34 according to the invention. Fig. 3a gives a view along the section A-A (Fig. 2b) of the
end portion 129 with theparts 132 of thepipes 32. Fig. 3b is a cutaway side view of the nozzle means 34. - The air coming from 132 is sent through a plurality of
holes 35 to asmany chambers 36, which comprise anon-return valve 37 with aball 137 andspring 237. - The air is sent at high speed through an
oblique nozzle 38 from thechamber 36 to thepipe 29 and creates an upward flow. - The
aspiration intake 30 can have a hard metal lining so as to lessen wear caused by the passage of debris. -
- 10 - cutter bucket
- 11 - head
- 111 - carrying shaft
- 12 - excavation means
- 13 - rotatable tools
- 14 - middle aspiration zone
- 15 - inner toothed wheel
- 16 - outer wheels
- 17 - fork
- 18 - spring means
- 19 - damping means
- 20 - hydraulic motors
- 21 - drive axle
- 22 - casing
- 23 - toothed ring
- 24 - excavation face
- 25 - chain
- 26 - means to attack ground
- 126 - teeth
- 27 - blade means
- 28 - means to withdraw debris
- 29 - withdrawal pipe
- 129 - squashed end portion
- 30 - aspiration intake
- 31 - means to deliver compressed air
- 32 - pipes
- 132 - lower part of pipes
- 33 - compressed air supply
- 34 - nozzle means
- 35 - holes
- 36 - chambers
- 37 - non-return valve
- 137 - ball
- 237 - spring
- 38 - oblique nozzle
- 39 - guide means
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8331183 | 1983-01-24 | ||
IT8383311A IT1209018B (en) | 1983-01-24 | 1983-01-24 | MILLING BUCKET. |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0114584A2 EP0114584A2 (en) | 1984-08-01 |
EP0114584A3 EP0114584A3 (en) | 1984-08-29 |
EP0114584B1 true EP0114584B1 (en) | 1987-05-13 |
Family
ID=11319926
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP83830282A Expired EP0114584B1 (en) | 1983-01-24 | 1983-12-27 | Chain cutter excavator |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0114584B1 (en) |
JP (1) | JPS59138615A (en) |
DE (1) | DE3371547D1 (en) |
IT (1) | IT1209018B (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2579265B1 (en) * | 1985-03-20 | 1992-02-14 | Sourice Claude | WELL-GROWING METHOD AND DEVICE |
FR2574847B1 (en) * | 1984-12-13 | 1987-01-16 | Soletanche | DEVICE FOR PERFORMING LARGE DIAMETER CIRCULAR DRILLING IN THE GROUND |
IT1240873B (en) * | 1990-03-16 | 1993-12-17 | Casagrande Spa | EXCAVATION DEVICE WITH HORIZONTAL ROTARY CUTTER |
DE59204931D1 (en) * | 1992-01-30 | 1996-02-15 | Hochtief Ag Hoch Tiefbauten | Device for introducing a bottom slot in the course of the manufacture of a sealing or retaining wall |
DE29522060U1 (en) * | 1994-12-09 | 1999-07-29 | Wirth Co Kg Masch Bohr | Slot milling machine |
EP1640509B2 (en) * | 2004-08-23 | 2014-03-05 | BAUER Maschinen GmbH | Method of making a sloted wall in ground and device therefor |
FR2883893B1 (en) * | 2005-03-31 | 2007-06-22 | Cie Du Sol Soc Civ Ile | SUCTION MOUTH FOR TRANCHE EXCAVATION MACHINE |
ITUD20060105A1 (en) * | 2006-04-21 | 2007-10-22 | Casagrande Spa | APPARATUS FOR ACCESSIBILITY IN MOTORIZATION |
ITBO20090227A1 (en) * | 2009-04-09 | 2010-10-10 | Simex Engineering Srl | MILLED HEADER TO CARRY OUT EXCAVATION OR FINISHING WORKS WITH COPLANAR SURFACES WITHOUT STEPS OR CONTINUITY SOLUTIONS |
ITTO20110961A1 (en) * | 2011-10-24 | 2013-04-25 | Soilmec Spa | EXCAVATION MUD EVACUATION SYSTEM. |
CN106801420A (en) * | 2017-02-05 | 2017-06-06 | 胡龙顺 | The construction machinery and method of a kind of cylindrical support body |
CN106906820A (en) * | 2017-02-15 | 2017-06-30 | 胡龙顺 | I-shaped steel fore water-stop curtain making apparatus |
CN106759298A (en) * | 2017-02-26 | 2017-05-31 | 胡龙顺 | A kind of manufacture method of button foundation pile |
CN107022998A (en) * | 2017-05-24 | 2017-08-08 | 刘玉兴 | A kind of manufacturing technology of joint interfix wall |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS495402B1 (en) * | 1969-12-13 | 1974-02-07 | ||
ES420924A1 (en) * | 1972-12-14 | 1976-04-01 | Hydrosol | Device for drilling in hard rock formation |
JPS504503U (en) * | 1973-05-07 | 1975-01-17 |
-
1983
- 1983-01-24 IT IT8383311A patent/IT1209018B/en active
- 1983-12-27 EP EP83830282A patent/EP0114584B1/en not_active Expired
- 1983-12-27 DE DE8383830282T patent/DE3371547D1/en not_active Expired
-
1984
- 1984-01-24 JP JP59009633A patent/JPS59138615A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0114584A2 (en) | 1984-08-01 |
IT1209018B (en) | 1989-07-10 |
IT8383311A0 (en) | 1983-01-24 |
EP0114584A3 (en) | 1984-08-29 |
JPS59138615A (en) | 1984-08-09 |
DE3371547D1 (en) | 1987-06-19 |
JPH0567734B2 (en) | 1993-09-27 |
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