US3753468A - Drive arrangement for telescopically arranged elements - Google Patents

Drive arrangement for telescopically arranged elements Download PDF

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Publication number
US3753468A
US3753468A US00233970A US3753468DA US3753468A US 3753468 A US3753468 A US 3753468A US 00233970 A US00233970 A US 00233970A US 3753468D A US3753468D A US 3753468DA US 3753468 A US3753468 A US 3753468A
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United States
Prior art keywords
cable
members
column
telescopic
shaft
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 - Lifetime
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US00233970A
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English (en)
Inventor
B Casagrande
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Individual
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Individual
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Publication date
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Publication of US3753468A publication Critical patent/US3753468A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/14—Booms only for booms with cable suspension arrangements; Cable suspensions
    • 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
    • E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/306—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom with telescopic dipper-arm or boom
    • 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
    • E02F3/4136—Dippers; Buckets ; Grab devices, e.g. manufacturing processes for buckets, form, geometry or material of buckets with grabbing device with grabs mounted on a slidable or telescopic boom or arm

Definitions

  • the present invention has, as its subject, improvements to the telescopic columns generally, but has particular utility for machines for making foundations; to be more specific, telescopic columns which operate grabs or drills and which are used in the construction of foundations and are transported on self-propelled means.
  • Telescopic columns which are employed for this purpose are already known and consist of two, three or more elements, the innermost element alone being normally driven.
  • shock-absorbers are needed in the ascent buffers; discontinuous power is required of the lifting means and therefore adjustment of pulling force is difficult; there is minimal guidance during descent, from when the outermost column reaches the end of its run; construction is complex; for purposes of strength and to reach worthwhile depths it is necessary to use a noteworthy number of columns solely for guidance purposes; so as to reach a depth of 30 meters three columns plus the guidance sleeve are required; lastly the only force exerted on the grab during the last part of its run is the force exerted by its own weight and by the last column.
  • the herein proposed improvements permit the following: elemination of shock absorbers and simplification of the construction of the columns; adjustment, as required and in a constant manner, both of the force to be applied to the grab and of the speed of impact of the grab; maintenance of the guidance of the columns at an optimum value always, with a slight reduction thereof only when they are in the position of full extension; lastly, the ability to reach the same depth with fewer movable shafts, two shafts, for example being enough to reach depths of thirty meters. It can thus be seen how the improvements herein proposed enhance to a notable extent the state of the art already known.
  • the invention comprises the following, where two movable shafts are used: a drive unit, which could even be a winch with a drum for winding up two cables in the same direction, is mounted immovably on a guidance sleeve. While the drive means could also consist of one or two doubleaction or single-action pistons, where a winch is used as the drive means the two ends of the cables are fixed to the ends of the outer movable shaft.
  • the inner shaft will be connected to the guidance sleeve by two cables.
  • the two cables are fixedly connected at opposite ends thereof to the guidance sleeve and to the upper end of the second (inner movable) shaft.
  • one cable passes over the upper end of the outer movable shaft while the second passes through the inside of the same shaft; the first cable is then connected to the guidance sleeve while the second turns beneath the same shaft and then also goes on to be connected to the guidance sleeve.
  • the position will be that of the two cables which come out of the winch the one which goes upwards will be completely unwound, while the cable which goes downwards will be completely wound up; and of the two cables which connect the guidance sleeve to the inner movable shaft, the cable which passes above the outer movable shaft will be completely outside the same shaft, while the cable which passes below the outer movable shaft will be completely inside the same shaft.
  • the cables In the fullylowered position the cables will be positioned in the opposite manner.
  • the outer movable shaft functions as a movable pulley
  • the cable which connects the inner shaft to the guidance sleeve performs the function of a drive cable of a predetermined fixed length. Therefore, just as with a movable pulley, if the length of the cable is kept fixed and the pulley wheel is moved, the moving end of the cable has to move in parameters double those of the pulley wheel, so in this invention the inner movable shaft which acts as a moving attachment moves to an extent double that of the movement of the outer movable shaft which acts as a movable pulley wheel.
  • FIG. 1 shows a shovel excavator, driven by cables, and illustrates a telescopic column which, in accordance with the invention comprises two movable telescopic elements plus a guidance sleeve.
  • FIG. 2 is an enlarged detail view of the telescopic arrangement of FIG. 1.
  • reference 1 indicates an excavator, which in this case, operates with cables but could also be of a hydraulic-drive type or of other types normally offered commercially.
  • the excavator 1 has an arm 2, such as of the trellis type, and operates during its movements on the tracks 3.
  • the guidance sleeve 5 At the end of the arm 2, there is hinged at 4 the guidance sleeve 5, to which at 6 is attached a means 7, in this case a piston, which by counteraction at 8 serves to determine the axial orientation of sleeve and, thereby of the entire telescopic column.
  • a cable drive could be used, in which case its attachment point would be positioned above the point 4 if movement is to be carried out only towards the outside of the system (i.e., movement away from the excavator); whereas, if movement of the grab is to be both outwards and inwards, then two sets of cables will be attached, one above and the other below the point 4.
  • an outer movable shaft or columnar element 9 within which is the inner movable shaft or columnar element 11.
  • the column 9 can slide axially within the guidance sleeve 5, and the column 11 can do the same within the column 9.
  • two movable shaft elements are disclosed; however, the invention is equally applicable to telescopic arrangements comprising more than two movable shafts.
  • the grab 10 which could be replaced with other implements, such as a drill for example, is fixed onto a platform 13 which, in turn, is connected tothe innermost column which in this case is column 11.
  • the platform 13 can be immovable or rotatable. It will be rotatable where it is necessary to use a drill or rotating grab for excavation-erosion work or the like.
  • Rotation could be provided by a hydraulic motor.
  • the guidance sleeve 5 carries on one side thereof both the drive means, such as a winch, and also the articulated-joint means 4 and the attachment means 6, and on the other side, in a position which is not the only one possible and has been shown only to render the description easy, the fixture means 24 and 27, which could be replaced by one single means, for the cables 21 and 29.
  • the cables 16, 21, 29, 31 are here shown, as an example, as being single in number, but they could be more than one in number for each usage and could be differently positioned around the shaft.
  • the cables 16 and 31 extend in opposite directions from the winch 15, in such a way that, while one is being wound up, the other is being unwound and vice versa.
  • the telescopic shaft 9 which is fixed immovably to the cables by the fixture means 17 and 19.
  • Said cables which, are fixed respectively at 24 and 27 are connected to the shaft 11, which is within the shaft 9, at 23 and, while one cable, 21 to be exact, passes above the shaft 9, the other cable 29 passes below it.
  • the driven shaft 11 will move in parameters double those used by the first shaft.
  • the force acting on the grab or on the drill can always be controlled and is always equal to the value desired, since the operator determines and maintains it.
  • a telescopic column comprising at least one group of three coaxial members telescopically arranged one within the other, said group comprising an outer, an intermediate and an inner member, the intermediate one of said members being axially slidable within the outer one of said members and the inner one of said members being axially slidable within the intermediate one of said members, a cable means comprising a fixed length cable fixedly attached to the outer and inner ones of said members, respectively, the intermediate one of said members constituting a movable pulley wheel means for said cable, whereby the inner one of said members is constrained to travel axially relative to the outer member double the distance of the intermediate member pursuant to the intermediate member being moved axially relative to the outer member.
  • the column of claim 1 including a drive means for driving said intermediate member axially relative to said outer member.
  • the column of claim 1 including a guidance means for changing the inclination of the telescopic axis relative to earth.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Storing, Repeated Paying-Out, And Re-Storing Of Elongated Articles (AREA)
US00233970A 1971-03-18 1972-03-13 Drive arrangement for telescopically arranged elements Expired - Lifetime US3753468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8332571 1971-03-18

Publications (1)

Publication Number Publication Date
US3753468A true US3753468A (en) 1973-08-21

Family

ID=11320147

Family Applications (1)

Application Number Title Priority Date Filing Date
US00233970A Expired - Lifetime US3753468A (en) 1971-03-18 1972-03-13 Drive arrangement for telescopically arranged elements

Country Status (7)

Country Link
US (1) US3753468A (es)
AT (1) AT313190B (es)
CH (1) CH545891A (es)
DE (1) DE2212876A1 (es)
ES (1) ES400371A1 (es)
FR (1) FR2130135B1 (es)
GB (1) GB1363014A (es)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035969A (en) * 1975-06-04 1977-07-19 Bruno Casagrande Telescopic columns of machines for making foundations, and the telescopic columns thereby derived
DE2845878A1 (de) * 1978-10-21 1980-04-24 Salzgitter Maschinen Ag Bohreinrichtung fuer erdbohrungen
US4971157A (en) * 1988-07-26 1990-11-20 Societe Anonyme Dite - Soletanche Apparatus for the removal of spoil when making trenches of great depth
US5746277A (en) * 1995-11-06 1998-05-05 Howell, Jr.; Richard L. Drilling apparatus
US6725946B2 (en) 2001-08-27 2004-04-27 Richard L. Howell, Jr. Excavation apparatus
US20080217037A1 (en) * 2007-03-06 2008-09-11 Howell Richard L Excavation apparatus
US20110168421A1 (en) * 2010-01-14 2011-07-14 ABI Anlagentechnik-Baumaschinen- Industriebedarf Maschinenfabrik Telescoping leader

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1132101A (en) * 1978-11-24 1982-09-21 Ryutaro Yoritomi Excavator having telescopic arm assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US557482A (en) * 1896-03-31 Boring-rod for well-augers
US3517760A (en) * 1968-03-22 1970-06-30 Delmag Maschinenfabrik Telescopic drill rods for soil drilling equipments

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1404571A (fr) * 1964-05-20 1965-07-02 Perfectionnements dans la construction de bras de grues
FR1492931A (fr) * 1966-05-11 1967-08-25 Grue à flèche télescopique
FR1481417A (fr) * 1966-05-26 1967-05-19 Soletanche Perfectionnements apportés à l'exécution de terrassements profonds et au matériel permettant cette exécution

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US557482A (en) * 1896-03-31 Boring-rod for well-augers
US3517760A (en) * 1968-03-22 1970-06-30 Delmag Maschinenfabrik Telescopic drill rods for soil drilling equipments

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035969A (en) * 1975-06-04 1977-07-19 Bruno Casagrande Telescopic columns of machines for making foundations, and the telescopic columns thereby derived
DE2845878A1 (de) * 1978-10-21 1980-04-24 Salzgitter Maschinen Ag Bohreinrichtung fuer erdbohrungen
US4971157A (en) * 1988-07-26 1990-11-20 Societe Anonyme Dite - Soletanche Apparatus for the removal of spoil when making trenches of great depth
US5746277A (en) * 1995-11-06 1998-05-05 Howell, Jr.; Richard L. Drilling apparatus
US6725946B2 (en) 2001-08-27 2004-04-27 Richard L. Howell, Jr. Excavation apparatus
US20080217037A1 (en) * 2007-03-06 2008-09-11 Howell Richard L Excavation apparatus
US7640998B2 (en) 2007-03-06 2010-01-05 Howell Jr Richard L Excavation apparatus
US20110168421A1 (en) * 2010-01-14 2011-07-14 ABI Anlagentechnik-Baumaschinen- Industriebedarf Maschinenfabrik Telescoping leader
US8887830B2 (en) * 2010-01-14 2014-11-18 Abi Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik Und Vertriebsgesellschaft Mbh Telescoping leader

Also Published As

Publication number Publication date
AT313190B (de) 1974-02-11
FR2130135B1 (es) 1974-12-13
DE2212876A1 (de) 1972-09-28
GB1363014A (en) 1974-08-14
FR2130135A1 (es) 1972-11-03
ES400371A1 (es) 1975-01-01
CH545891A (es) 1974-02-15

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