Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
  • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
  • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
  • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
  • B66C23/44—Jib-cranes adapted for attachment to standard vehicles, e.g. agricultural tractors
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B66—HOISTING; LIFTING; HAULING
  • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
  • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
  • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
  • B66F11/044—Working platforms suspended from booms
  • B66F11/046—Working platforms suspended from booms of the telescoping type
• • 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
  • E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
  • E02F3/963—Arrangements on backhoes for alternate use of different tools

Definitions

• a lifting arrangement a so-called hoist, which can be mounted on a vehicle.
• the present invention relates to a lifting arrangement, a so-called hoist, which is intended to be carried by a vehi- 5 cle, such as a tractor or a digger, and comprises an arm ⁇ • system which has at least two mutually pivoted arm sections and which includes a first end by means of- which the arm system is secured to the vehicle, preferably so as to be rotatable about an essentially vertical axis and swingable 10 about an essentially horizontal axis, and which further in ⁇ cludes a second end which forms a free end of the arm sys ⁇ tem on which there is mounted a carrier, such as a hoist cage, for accommodating one or more people.
• a carrier such as a hoist cage
• Such lifting arrangements are known to the art.
• a common feature of such lifting arrangements is that they can be brought to a collapsed state, in which the arm sections lie essential ly along and adjacent to one another, and to an extended state in which the arm sections lie essentially ' in 20 line with one another.
• the arm system is extended in an essentially vertical plane, the respective arm sections of the arm system being pivot ⁇ ally connected and capable of being swung relative to one another about an essentially horizontal axis.
• Such ar- 25 rangements require considerable vertical space when extend ⁇ ing the arm system of such arrangements, which can at times create serious problems.
• problems are encountered when 30 attempting to collapse the arm system to an inactive state in which the arm system will not impede the digger assembly, etc. and in which load is uniformly distributed.
• the present invention provides a lifting arrangement which 35 solves these problems. Through the combination of gripping means there is provided a particularly purposeful arrange ⁇ ment.
• the inventive arrangement is also more robust and safer than lifting arrangements that are constructed in accordance with known techniques.
• the present invention thus relates to a vehicle mounted lifting arrangement, so-called hoist, intended for such ve ⁇ hicles as tractors or diggers and comprising an arm system which includes at least two mutually pivoted arm sections, and which arm system has a first end, included on a first of said arm sections, by means of which the arm system is secured to the vehicle, preferably so as to be rotatable about a substantially vertical axis and swingable about a substantially horizontal axis, and a second end which forms a free end of the arm system and which carries a cage for accommodating one or more people, and in which the arm sec ⁇ tions of said arm system are arranged sequentially, one after the other, and co-act with means for collapsing and extending the arm system, and in which when the arm system •• is collapsed or extended at least one arm section swings essentially in a plane which is common to a multiple of arm sections.
• the inventive lifting arrangement is mainly characterized in that the arm system and arm sections thereof are ar ⁇ ranged so that a second arm section forming the arm section which is pivotally connected to the first arm section can be swung in a plane which is essentially parallel with and which in preference substantially includes the horizontal axis about which the arm system is swung at said first end, wherein with the arm system in a collapsed and horizontal position the second arm section can be swung relative to the first arm section in an essentially horizontal plane.
• Figure 1 is a schematic side view of a tractor fitted with ⁇ 5 a digging assembly, and illustrates a first embodiment of a lifting arrangement according to the invention, with the lifting arrangement in its collapsed state;
• FIG. 2 is a plan view of the tractor etc. illustrated in 10 Figure 1, with certain parts being omitted from this illus ⁇ tration;
• Figure 3 schematically illustrates the inventive arrange ⁇ ment of Figures 1 and 2 in its extended state
• Figure 4 is a schematic side view which illustrates the erection of a pillar by means of the inventive arrangement and with the aid of gripping devices ;
• Figure 5 illustrates a working stage, seen from above in Figure k ;
• Figure 6 illustrates schematically a first embodiment of inventive gripping devices seen towards the plane in which 25 gripping is intended to take place
• Figure 7 illustrates, inter alia, the gripping devices according to Figure 6 seen from beneath in said Figure.
• the reference numeral 1 identifies a lifting arrangement according to the invention mounted on a vehicle which in the i l lustrated embodiment comprises as an example a tractor fitted with a digging assembly 1' .
• the illustrated lifting arrangement includes an arm system 3, 4 having two mutually 5 pivoted arm sections 3, 4, a first arm section 3 and a second arm section 4.
• the arm system 3, 4 includes a first end 1" which is included in the first arm section 3, and by means of which the arm system 3 , 4 is secured to the vehi ⁇ cle, preferably so as to be rotatable about an essentially vertical axis.
• the arm end 1" is mounted on the upper end 5 of a rotatable shaft 6 which extends in the direction of the vertical ex ⁇ tension of the vehicle, such that the arm end 1" will be horizontal, the reference numeral 7 identifying devices for attachment of the shaft 6 and for driving said shaft, pre ⁇ ferably electrical ly.
• a preferred embodiment is shown, where a foundation 8 is provided and located in a lateral, rearward position on the vehicle.
• the end 1" of the arm system is pivotally mounted on the t upper end 5 of the shaft 6 so as to be pivotable about an essentially horizontal axis 9.
• the illustrated embodiment includes a piston-cylinder arrangement 10 which is active between the shaft 6 and the arm section 3 in a manner to swing or pivot said arm section 3 and therewith the arm * system.
• the arm system also has a second end 11, which forms a free end 11, on which there is mounted a carrier 12, such as a cage 12, for accommodating one or more people.
• the carrier 12, cage 12 is preferably pivotally suspended so that it will take a pre-determined, essentially vertical position irrespective of the movement of the .arm system.
• the cage 12 is pivot ⁇ ally suspended at its upper part 12 ' , in a bifurcate attach- ment 13 and can swing about an axis 14 extending trans ⁇ versely to the axial direction of the attachment 13.
• the attachment 13 may also be conceivably arranged to pivot about its axial direction 15, i.e. in a direction perpendicu ⁇ lar to the direction of the axis 14.
• the arm sections 3, 4 are arranged sequentially one after the other, and devices, such as hydraulic piston-cylinder devices, are arranged to co-act with said arm sections 3, 4 in a manner to enable the arm system to be collapsed, as illustrated in Figures 1 and 2, for example, and extended, as illustrated in Figure 3, wherein at least one arm sec ⁇ tion 3 is swung essentially in a plane which is common to a multiple of arm sections 3, 4 during said arm system col ⁇ lapsing and arm system extending movement.
• devices such as hydraulic piston-cylinder devices
• the arm system and the arm sections 3, 4 is/are arranged so that a second arm section 4, constituting the arm section 4 which is pivotally connected to said first arm section 3, can be swung in a plane which is essentially parallel with and which in preference substantially includes the essentially horizontal axis 9 about which the arm system can be swung at said first end 1", wherein with the arm system in its collapsed and horizontal position, Figures 1 and 2, said second arm section 4 can be swung relative to said first arm section in an essentially horizontal plane.
• the two arm section 3 , 4 of the illustrated embodiment are arranged in an essentially common plane and are both pivotally connected to a connecting piece 16, the swinging or pivotal movement of the second arm section being effected by means of a piston-cylinder device 17 connected to said arm section and by means of link arms 18 connected to said connecting piece, Figures 2 and 5.
• the connectirig piece 16 and its connections are symmetrical so as to enable the connecting piece to be removed and turned through 180 about a horizontal axis, wherewith the second arm section 4 changes sides in relation to the first arm section 3.
• the arm section 4 will thus lie above the arm section 3 instead of beneath the same as in the Figure 5 illustration.
• each arm section wi ll include parts 3' , 3"; 4' , 4" which can be extended relative to one another, this extension of respective arm sections being effected by piston-cylinder devices 19 or the like, acting in the di ⁇ rection of the longitudinal axis of respective arm sections.
• Figures 6 and 7 illustrate gripping devices 20 which are fitted to the arm system and which are intended to grip an object, such as a pillar, column 21 or the like, as illus ⁇ trated in Figures 4 and 5, for lifting and maneuvering the pillar by means of the arm system, in order to erect said pillar.
• the gripping devices are mounted in a manner which enables them to de- pend from the underside 1'" of the arm system, this side of the arm system consituting the side which faces the ground 22 when the arm system extends horizontally.
• the gripping devices 20 are preferably mounted on said first arm section, preferably in the proximity of said connecting piece 16, between the first and the second arm sections.
• the grip ⁇ ping devices are also preferably pivotally connected to the arm system, and are preferably capable of being swung auto ⁇ matically in an essentially vertical plane by means of a piston- cylinder device 23, or the like, as illustrated schemati- cally in Figure 3 and 7.
• Each of the gripping devices 20 comprises two pivotally connected jaw parts 20" which can be caused to grip around, e.g., a pillar 21 through the action of a force transmitter 24, such as a hydraulic piston-cylinder device 24.
• the jaws of respective gripping devices are intended to grip the pillar in planes which form desired angles to the horizontal plane and are essentially perpendicular to the vertical plane, as illustrated schematically in Figures 3 and 4 .
• the piston-cy ⁇ linder device 24 is arranged to act on the jaws in the proximity of the pivot connection between the jaws, where ⁇ with each of two pull rods is pivotally connected with a respective jaw and a common attachment 25 on the piston- cylinder device 24.
• the attachment 25 is pivotally con ⁇ nected to an attachment part 26 on the arm system, the pis- ton-cylinder device 23 by means of which the gripping de ⁇ vices are pivoted being arranged to act between the attach ⁇ ment 25 and the attachment part 26.
• the arm system of the inventive lifting arrangement can be extended from a collapsed state even though the space available is relatively restricted. Space can be made available for use of the gripping devices 20, by moving the cage 12 to one side, as illustrated in Figures 4 and 5.
• the inventive lifting arrangement affords important advantages over the known prior art.
• the inventive lifting ar ⁇ rangement affords a highly flexible solution with regard to the working range of such arrangements.
• the gripping devices can be used to secure the lifting arrangement, by causing said devices to grip around a firmly seated post, pillar or the like.
• the present invention has been described w i th reference to subs tant i a l l y one exemp l yfy i ng embod i ment thereof .
• I t wi l l be understood , however , that other embodiments are con- DC vable and that minor modif ications can be made without departing f rom the scope of the invention .
• the arm system may comprise more than two arm sections, although it is preferred that all arm sec ⁇ tions can be swung in an essentially common plane when ex ⁇ tending and collapsing the arm system.
• the gripping devices may also have a form different to that illustrated.
• the lifting arrangement can be fitted to other types of vehicles, such as trucks or corresponding vehicles.
• the inventive lifting arrangement may also be made a permanent, immobile structure.

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• Engineering & Computer Science (AREA)
• Structural Engineering (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• Civil Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Agronomy & Crop Science (AREA)
• Geology (AREA)
• Forklifts And Lifting Vehicles (AREA)
• Jib Cranes (AREA)
• Agricultural Machines (AREA)
• Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20366525

Family Applications (1)

Country Status (4)

Cited By (1)

Citations (7)

• 1986
  • 1986-12-04 SE SE8605221A patent/SE455787B/sv not_active IP Right Cessation
• 1987
  • 1987-12-03 WO PCT/SE1987/000578 patent/WO1988004277A1/en active IP Right Grant
• 1988
  • 1988-08-03 FI FI883635A patent/FI87184C/fi not_active IP Right Cessation
  • 1988-08-04 DK DK436088A patent/DK165401C/da not_active IP Right Cessation

Patent Citations (7)

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