CA1317555C - Mobile lifting apparatus with articulating and telescoping links for a manually levellable nacelle - Google Patents
Mobile lifting apparatus with articulating and telescoping links for a manually levellable nacelleInfo
- Publication number
- CA1317555C CA1317555C CA000563112A CA563112A CA1317555C CA 1317555 C CA1317555 C CA 1317555C CA 000563112 A CA000563112 A CA 000563112A CA 563112 A CA563112 A CA 563112A CA 1317555 C CA1317555 C CA 1317555C
- Authority
- CA
- Canada
- Prior art keywords
- nacelle
- members
- telescopic
- lifting apparatus
- arm
- 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 - Fee Related
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE:
A lifting apparatus comprising a system of reciprocally pivoted arm members, mounted on a vehicle and actuated by hydraulic cylinders, and a nacelle connected to the upper end of the system of arm members which may be lifted and displaced by the same, where an additional system of telescopic members, actuated by hydraulic cylinders is inserted in a rotatable fashion between the upper end of the system of arm members and the nacelle. Thanks to it the lifting apparatus is capable of raising the nacelle at remarkable heights, corresponding to the amount of the heights reacheable by the system of arm members and by the system of telescopic members, when this latter system is orientated in a vertical direction or, if the nacelle is only lifted at the height reacheable by the system of arm members, extended horizontal displacements of the nacelle may be attained by moving the system of telescopic members in a horizontal direction; very extended horizontal displacements are possible during this operation without any loss of stability.
A lifting apparatus comprising a system of reciprocally pivoted arm members, mounted on a vehicle and actuated by hydraulic cylinders, and a nacelle connected to the upper end of the system of arm members which may be lifted and displaced by the same, where an additional system of telescopic members, actuated by hydraulic cylinders is inserted in a rotatable fashion between the upper end of the system of arm members and the nacelle. Thanks to it the lifting apparatus is capable of raising the nacelle at remarkable heights, corresponding to the amount of the heights reacheable by the system of arm members and by the system of telescopic members, when this latter system is orientated in a vertical direction or, if the nacelle is only lifted at the height reacheable by the system of arm members, extended horizontal displacements of the nacelle may be attained by moving the system of telescopic members in a horizontal direction; very extended horizontal displacements are possible during this operation without any loss of stability.
Description
13~ 7~
The present invention consists in a lifting apparatus mounted on a vehicle, comprising lif-ting members supported by the structure of a vehicle and suitable for raising a nacelle carrying persons and/or things. These lifting apparatus are used to carry materials and especially personnel, for working in places difficult to be reached by other means.
Lifting apparatus of the aforementioned general type are knGwn, which are provided with a nacelle or platform supported by a system of mechanically actuated vertical telescopic members. The known lifting apparatus of this type have, however, an extremely limited reach, in that the nacelle or platform may be lifted with respect to the vehicle, substantially only in a vertical direction; any necessary horizontal displacement, must be made by the same vehicle carrying the lifting apparatus. Furthermore by these arrangements very limited heights may be reached, otherwise the dimensions of the vehicle transporting the lifting system in the lowered position will not be acceptable in the road circulationO
Liftin~ apparatus of the general type are also known from prior patents of the same Holder, in which the nacelle is supported by a system of reciprocally pivoted arm members, actuated by hydraulic cylinders. Said lifting apparatus allow remarkable lifting heights, as well as a wider working reach, because the nacèlle may also be horizontally moved, by means of the system of articulated arms; said system may be mounted on the vehicle by interposition of a rotating thrust block actuated by a suitable motor. ~lowever the horizontal displacements performed in this way are rather limited due to the necessity of keeping the stability of the system with its centre of gravity always inside the ~k ~3~7~
supporting perimeter on the ground; said perimeter which is defined providing the vehicle with supporting legs having hydraulic jacks may be increased, but only within relatively restricted limits with respsct to the natural supporting perimeter of the vehicle. When the nacelle must be horizontally displaced, both for the remarkable weight of the terminal elements of the system of arm members supporting the nacelle, or becau~e the entire system of arms needs to be moved towards the desired direction to be given to the nacelle, strong displacements of the centre of gravity may occur limiting thereby the possibilities of use which, complying with suitable safety measures, may be employed for the nacelle.
The main object of the present invention is to provide a lifting apparatus mounted on a vehicle capable of reaching, while retaining safety limits, remarkable operative heights, and allowing considerable horizontal displacements of the nacelle, thus performing an extended reach and still having, when the system is completely lowered, an overall size compatible with the road circulation of the vehicle.
This object can be achieved, according to the invention, by means of a lifting apparatus comprising a system of reciprocally articulated arm members, mounted on a vehicle and actuated by hydraulic cylinders, a nacelle connected to an upper end of the system of arm members to be lifted and displaced by it, an additional system of telescopic members actuated by hydraulic cylinders and being rotatably inserted between the upper end of the system of arm members and the nacelle, the system of telescopic members comprising at least two elongated elements located one in the other and provided ~ .
~3~75~
with reclprocal guide rollers, the first elongated element being articulated to the system of arm members and being connected to it by a hydraulic cylinder arranged for regulating an inclination of the system of telescopic members, and the last elongated element of the telescopic system being articulated to the nacelle and being connected to it by a hydraulic cylinder arranged for regulating the inclination of the nacelle, the system of arm members comprising a turret with respect to which a first lifting arm is articulated by means of a pair of connecting rods, the first lifting arm being connected by an actuating hydraulic cylinder to the turret, a cradle being articulated to the first lifting arm and guided by a tie rod-strut, a second lifting arm articulated to the cradle and connected to the same by an actuating cylinder, and a counter cradle articulated to the second lifting arm and guided by a tie rod, the counter cradle forming an element of the system of arm members with respect to which the system of telescopic members is articulated.
Thanks to this composite structure, the lifting apparatus may raise the nacelle at remarkable heights, corresponding - 2a -,~
13 :~ 7 ~r.3 ~ .~
to the amount of heights reacheable by the system of arm members and by the system of telescopic members, when this latter system is orientated in a vertical direction or, if the nacelle is only raised at the height reacheable by the system of arm members, great horizontal displacements of the nacelle may be attained by the lifting apparatus, when the system of telescopic members is orientated in a horizontal direction. These horizontal displacements of the nacelle, even if very extended, do not cause a loss of stability, because only the terminal elements of the system of telescopic members are laterally elongated with the nacelle, whereas the system of arm members, having a preponderant weight, remains balanced or, when needed, may be fairly displaced at the opposed side to maintain a stable balance.
Furthermore any intermediate condition, between the two aforesaid extreme conditions may be attained giving the system of teles~opic members an inclined position. Thus, a wide range of selectively operative phases of the nacelle, may be covered by the lifting apparatus, which cannot be attained by the ~nown systems.
On the other hand, when the lifting apparatus is lowered into the resting position on the vehicle carrying it, the system of telescopic members may be horizontally orientated over the system of lowered arm members and over the driver's cab of the vehicle, availing itself of the entire length of the vehicle, so as to reduce the height to the normally accepted dimensions compatible with thetraffic re~ulations.
The specific details and advantages of the object of the invention will be clearly described in the following description in conjunction with the accompanying drawings which are a schematically but not limitative example of a preferred embodiment of the inventionr wherein:
7~
FIG. 1 is a side view on a reduced scale, of a vehicle carrying a lifting apparatus according to the invention, lowered into the resting position for the road circulation of the vehicle;
FIG. 2 is a frontal view of the vehicle with a lifting apparatus according to FIG. 1;
FIG. 3 is a plan view of the vehicle according to the previous figures, provided with the means of support on the ground, but without the lifting apparatus;
FIGS. 4, 5 and 6 are side views of the inferior part of the section of the system comprising the articulated arms, in three positions, respectively: completely low~red, partially raised and completely raised;
FIG. 7 is a frontal view of the l:ifting device separated from the vehicle in the maximus elevated condition;
FIG. 8 is a side view on a largeI. scale of the proximal portion of the system of telescopic arms;
FIG. 9 similarly to fig. 8, is the distal view of the system 2S of telescopic arms;
FIG. 10 is a frontal view of the distal portion of the system of telescopic arms;
FIG. 11 analogously to FIG. 10 is a partial section view of the proximal portion and of some intermediate portions of the system of telescopic arms;
FIG. 12 on a larger scale is a cross section view along ~ 4 --1 r ~ ~ ~
dotted line XII-XII of fig. 10 of the system of telescopic arms;
FIGS. 13 to 16 are a view on a reduced scale, of the different arrangements performed by the lifting apparatus;
and FIG. 17 is a schematically view of the operative reach performed by the lifting apparatus.
1 indicates the bed of a vehicle, which in the example illustrated is a truck with driver's cab 2 and wheels 3, but it can also be a trailer, a railroad car or something else.
On bed 1 a thrust block 4 is mounted suitable for receiving the lifting apparatus and furthermore, a structure 5 with extensible arms 6 is provided in order to ensure a safe support on the ground when the lifting apparatus is operating; said arm have vertical jacks 7 suitable for providing a support on the ground when needed, widening the supporting perimeter, as shown in FIG. 3.
A turret 8 is mounted on the thrust block 4 forming the base element of the lifting apparatus. Thrust block 4 with turret 8 may be rotated with respect to the vehicle with any known means, preferably by a suitable motor, in order to orientate the lifting apparatus. Two connecting rods 9 and 10, are articulated to turret 8, formin~ a parallelogram articulated to a first lifting arm 11. This latter i5 actuated by a hydraulic cylinder 12 whose ends are articulated respectively to arm 11 and the base of turret 8.
The elements described herein are referred to each side of the lifting apparatus, but in the practical implementation some of them, and also some of those which will be described afterwards, are double, being repeated on the other side of ~ 3 ~
the lifting apparatus, as shown in fig. 7.
A square element 13 called cradle is articulated to the distal end of a first lifting arm 11. Said square element is also connected to the system of connecting rod 9-10 by means of a tie rod-strut 14; all these components are shaped in such a way that cradle 13 moves remaining substantially parallel to itself with respect to the variability of the system arrangement. When hydraulic cylinder 12 is not excited, these components may be brought into the resting position according FIGS. 1 and 4, where they are nested one into the other with very reduced overall size; this is the transport position. When using the lifting apparatus, hydraulic cylinder 12 is actuated and the same components may be partially raised as shown in fig. 5 or completely raised as shown in fig. 6 according to the lifting necessltles .
A second lifting arm 15 actuated by a hydraulic cylinder lB
is articulatd to cradle 13; said cylinder 18 is articulated to one end of cradle 13. A square element 16 called counter cradle is articulated to the opposed end of the second lifting arm 15. Furthermore coun~er cradle 16 is connected to cradle 13 by means of a tie rod 17 and all these elements are shaped in such a way that counter cradle 16 moves while remaining substantially parallel to itself with respect to the variability of the system arrangement. When hydraulic cylinder 18 is not excited, the latter components herein described may be brought into the resting position as shown in fig. 1, where the second lifting arm 15 and tie rod 17 lower on the first lifting arm 11 and counter cradle 16 overlaps driver's cab 2 of the carrying vehicle with a minimum overall size. When using the lifting apparatus, the hydraulic cylinder 18 is actuated and components may be ~ 3 ~ J
raised, for example into the positions illustrated in FIGS.
14 and 16.
The first element 19 of a system of telescopic members is articulated to counter cradle 16; said element may be orientated with respect to the counter cradle 16 by means oE
a hydraulic cylinder 20, which allows element 19 to be selectively placed in any position between the horizontal one (illustrated for example in FIGS. 15 and 16) and the vertical one (illustrated for example in FIGS. 14 and 16).
Inside the first element 19 a second element 22 is inserted, guided by own rollers 23, 23' and by roller 21 of the element 19, by means of said rollers the second element 22 can telescopically slide with respect to the flrst element 19. Analogously a third element 25 is inserted in the second element Z2, guided by its own rollers 26,26' and by rollers 24 of the element 22 in order to telescopically slide with respect to the second element 22. The three elements 19, 22 and 25 are twin elements, being repeated on each side of the lifting apparatus and form a telescopic system which can be extended and lowered by means of a hydraulic cylinder 27, placed between the twin elements of the telescopic system; its ands being connected to the first element 19 and respectively to the third element 25, as particularly illustrated in FIGS. 8 to 12. By means of cylinder 27, the telescopic system 19 - 25 may be lowered as shown in FIG. 1 or more or less extended according to the necessities, up to the maximum extension of the system as shown in FIGS. 14 to 16.
The third telescopic element 25 brings at its distal end a bracket 28 articulated to a nacelle 30, whose inclination with respect to the bracket 28 may be regulated by means of ~ 3 ~ 3 a hydraulic cylinder 20. If necessary, the hydraulic cylinder 27 (which regulates -the inclination of the element 19 and therefore of the system of telescopic elements 19 25) and the hydraulic cylinder 29 (which in turn, regulates the inclination of the nacelle 30 with respect to the bracket 28 and therefore to the system of telescopic elements 19 - 25) may be reciprocally regulated in the most suitable way, so that the nacelle 30 remains substantially parallel to itself with respact to the variability of the lifting apparatus arrangement.
The lifting apparatus described herein has an extreme versatility of use, because combining the various possibilities of displacement of its parts, the nacelle 30 may be vertically and horizontally displaced within wide limits. Thus, for example, extremely extending the hydraulic cylinder 12, 20 and 27 b~lt not cylinder 18 the arrangement according to FIG. 13 is c~eated, in which the nacelle 30 is at remarkable height, almost on the vertical of the carrying vehicle, whereas also extending the hydraulic cylindex 18 the arrangement according to FIG. 14 is created, where the nacelle 30 has reached, almost on the vertical of the carrying vehicle, its maximum height.
On the contrary, if hydraulic cylinder 20 is not extended, the telescopic system 19 - 2S is horizontally arranged and its extension allows the nacelle 30 to attain a strong lateral elongation with respect to the carrying vehicle, as shown in FIG. 15 - 16, in relation to two different height levels o~ the nacelle, whether the hydraulic cylinder 18, in turn, is extended or not.
As best seen in FIG. 15 and 16 when the nacelle is laterally displaced with respect to the carrying vehicle, most part of ~ 3 ~ J`
the lifting apparatus unit is near the verti.cal passing through the vehicle; for this reason the particular arrangement of the lifting apparatus object of the present invention allows remarkable lateral displacements of the nacelle without any displacement of the centre of gravity of the system outside the perimeter of support on the ground.
In particular arrangements such as in FIG. lS a strong counterweight is created due to the second lifting arm 15 which is positioned in the direction opposite the elongation of the nacelle. Thus, by using these arrangements, a strong lateral displacement of the heavy loaded nacelle can be attained.
When the liftlng apparatus particularly reaches the lS arrangements illustrated in FIG. 15 and 16 or in FIGS. 13, 14 and/or whenever a remarkable or maximum extension of the telescopic arm 19, 22, 25 is needed, brakes means not illustrated in the present drawings, are provided to prevent any movement between said tel.escopic elements, and to block one with respect to the other, the successive telescopic elements. This device prevents the arm from swinging avoiding the consequent pendular movements of the nacelle 30.
2S Of course the invention is not limited to the arrangements herein illustrated, but many other arrangements are possib~e, by actuating only a partial extension of the various hydraulic cylinders. FIG. 17 summarize all the different possibilities of modifying the lifting apparatus arrangement, and illustrates in a bidimensional view the range of positions covered by the nacelle of the lifting apparatus. It must be understood that the range of positions herein represented is referred to a specific orientation of the turret of the lifting apparatus; said ~ 3 ~ 7 j~
turret being mounted on a rotatable thrust block, therefore the whole tridimensional range oE displacement of the nacelle is defined by a rotation solid, having its axis coincident with the axis of the thrust block and whose section is defined by the bidimensional range of positions shown in fig. 17.
As best seen in FIG. 1 the nacelle 30, in the resting position, is located behind the carrying vehicle at a very low level from the ground. This ensure the easiest approach to the nacelle before raising it.
The invention has been herein described in relation to a specific embodiment, but any modifications and replacements lS of technical equivalents are possible without departing from the ambits of the invention and from the significance of the present Patent.
The present invention consists in a lifting apparatus mounted on a vehicle, comprising lif-ting members supported by the structure of a vehicle and suitable for raising a nacelle carrying persons and/or things. These lifting apparatus are used to carry materials and especially personnel, for working in places difficult to be reached by other means.
Lifting apparatus of the aforementioned general type are knGwn, which are provided with a nacelle or platform supported by a system of mechanically actuated vertical telescopic members. The known lifting apparatus of this type have, however, an extremely limited reach, in that the nacelle or platform may be lifted with respect to the vehicle, substantially only in a vertical direction; any necessary horizontal displacement, must be made by the same vehicle carrying the lifting apparatus. Furthermore by these arrangements very limited heights may be reached, otherwise the dimensions of the vehicle transporting the lifting system in the lowered position will not be acceptable in the road circulationO
Liftin~ apparatus of the general type are also known from prior patents of the same Holder, in which the nacelle is supported by a system of reciprocally pivoted arm members, actuated by hydraulic cylinders. Said lifting apparatus allow remarkable lifting heights, as well as a wider working reach, because the nacèlle may also be horizontally moved, by means of the system of articulated arms; said system may be mounted on the vehicle by interposition of a rotating thrust block actuated by a suitable motor. ~lowever the horizontal displacements performed in this way are rather limited due to the necessity of keeping the stability of the system with its centre of gravity always inside the ~k ~3~7~
supporting perimeter on the ground; said perimeter which is defined providing the vehicle with supporting legs having hydraulic jacks may be increased, but only within relatively restricted limits with respsct to the natural supporting perimeter of the vehicle. When the nacelle must be horizontally displaced, both for the remarkable weight of the terminal elements of the system of arm members supporting the nacelle, or becau~e the entire system of arms needs to be moved towards the desired direction to be given to the nacelle, strong displacements of the centre of gravity may occur limiting thereby the possibilities of use which, complying with suitable safety measures, may be employed for the nacelle.
The main object of the present invention is to provide a lifting apparatus mounted on a vehicle capable of reaching, while retaining safety limits, remarkable operative heights, and allowing considerable horizontal displacements of the nacelle, thus performing an extended reach and still having, when the system is completely lowered, an overall size compatible with the road circulation of the vehicle.
This object can be achieved, according to the invention, by means of a lifting apparatus comprising a system of reciprocally articulated arm members, mounted on a vehicle and actuated by hydraulic cylinders, a nacelle connected to an upper end of the system of arm members to be lifted and displaced by it, an additional system of telescopic members actuated by hydraulic cylinders and being rotatably inserted between the upper end of the system of arm members and the nacelle, the system of telescopic members comprising at least two elongated elements located one in the other and provided ~ .
~3~75~
with reclprocal guide rollers, the first elongated element being articulated to the system of arm members and being connected to it by a hydraulic cylinder arranged for regulating an inclination of the system of telescopic members, and the last elongated element of the telescopic system being articulated to the nacelle and being connected to it by a hydraulic cylinder arranged for regulating the inclination of the nacelle, the system of arm members comprising a turret with respect to which a first lifting arm is articulated by means of a pair of connecting rods, the first lifting arm being connected by an actuating hydraulic cylinder to the turret, a cradle being articulated to the first lifting arm and guided by a tie rod-strut, a second lifting arm articulated to the cradle and connected to the same by an actuating cylinder, and a counter cradle articulated to the second lifting arm and guided by a tie rod, the counter cradle forming an element of the system of arm members with respect to which the system of telescopic members is articulated.
Thanks to this composite structure, the lifting apparatus may raise the nacelle at remarkable heights, corresponding - 2a -,~
13 :~ 7 ~r.3 ~ .~
to the amount of heights reacheable by the system of arm members and by the system of telescopic members, when this latter system is orientated in a vertical direction or, if the nacelle is only raised at the height reacheable by the system of arm members, great horizontal displacements of the nacelle may be attained by the lifting apparatus, when the system of telescopic members is orientated in a horizontal direction. These horizontal displacements of the nacelle, even if very extended, do not cause a loss of stability, because only the terminal elements of the system of telescopic members are laterally elongated with the nacelle, whereas the system of arm members, having a preponderant weight, remains balanced or, when needed, may be fairly displaced at the opposed side to maintain a stable balance.
Furthermore any intermediate condition, between the two aforesaid extreme conditions may be attained giving the system of teles~opic members an inclined position. Thus, a wide range of selectively operative phases of the nacelle, may be covered by the lifting apparatus, which cannot be attained by the ~nown systems.
On the other hand, when the lifting apparatus is lowered into the resting position on the vehicle carrying it, the system of telescopic members may be horizontally orientated over the system of lowered arm members and over the driver's cab of the vehicle, availing itself of the entire length of the vehicle, so as to reduce the height to the normally accepted dimensions compatible with thetraffic re~ulations.
The specific details and advantages of the object of the invention will be clearly described in the following description in conjunction with the accompanying drawings which are a schematically but not limitative example of a preferred embodiment of the inventionr wherein:
7~
FIG. 1 is a side view on a reduced scale, of a vehicle carrying a lifting apparatus according to the invention, lowered into the resting position for the road circulation of the vehicle;
FIG. 2 is a frontal view of the vehicle with a lifting apparatus according to FIG. 1;
FIG. 3 is a plan view of the vehicle according to the previous figures, provided with the means of support on the ground, but without the lifting apparatus;
FIGS. 4, 5 and 6 are side views of the inferior part of the section of the system comprising the articulated arms, in three positions, respectively: completely low~red, partially raised and completely raised;
FIG. 7 is a frontal view of the l:ifting device separated from the vehicle in the maximus elevated condition;
FIG. 8 is a side view on a largeI. scale of the proximal portion of the system of telescopic arms;
FIG. 9 similarly to fig. 8, is the distal view of the system 2S of telescopic arms;
FIG. 10 is a frontal view of the distal portion of the system of telescopic arms;
FIG. 11 analogously to FIG. 10 is a partial section view of the proximal portion and of some intermediate portions of the system of telescopic arms;
FIG. 12 on a larger scale is a cross section view along ~ 4 --1 r ~ ~ ~
dotted line XII-XII of fig. 10 of the system of telescopic arms;
FIGS. 13 to 16 are a view on a reduced scale, of the different arrangements performed by the lifting apparatus;
and FIG. 17 is a schematically view of the operative reach performed by the lifting apparatus.
1 indicates the bed of a vehicle, which in the example illustrated is a truck with driver's cab 2 and wheels 3, but it can also be a trailer, a railroad car or something else.
On bed 1 a thrust block 4 is mounted suitable for receiving the lifting apparatus and furthermore, a structure 5 with extensible arms 6 is provided in order to ensure a safe support on the ground when the lifting apparatus is operating; said arm have vertical jacks 7 suitable for providing a support on the ground when needed, widening the supporting perimeter, as shown in FIG. 3.
A turret 8 is mounted on the thrust block 4 forming the base element of the lifting apparatus. Thrust block 4 with turret 8 may be rotated with respect to the vehicle with any known means, preferably by a suitable motor, in order to orientate the lifting apparatus. Two connecting rods 9 and 10, are articulated to turret 8, formin~ a parallelogram articulated to a first lifting arm 11. This latter i5 actuated by a hydraulic cylinder 12 whose ends are articulated respectively to arm 11 and the base of turret 8.
The elements described herein are referred to each side of the lifting apparatus, but in the practical implementation some of them, and also some of those which will be described afterwards, are double, being repeated on the other side of ~ 3 ~
the lifting apparatus, as shown in fig. 7.
A square element 13 called cradle is articulated to the distal end of a first lifting arm 11. Said square element is also connected to the system of connecting rod 9-10 by means of a tie rod-strut 14; all these components are shaped in such a way that cradle 13 moves remaining substantially parallel to itself with respect to the variability of the system arrangement. When hydraulic cylinder 12 is not excited, these components may be brought into the resting position according FIGS. 1 and 4, where they are nested one into the other with very reduced overall size; this is the transport position. When using the lifting apparatus, hydraulic cylinder 12 is actuated and the same components may be partially raised as shown in fig. 5 or completely raised as shown in fig. 6 according to the lifting necessltles .
A second lifting arm 15 actuated by a hydraulic cylinder lB
is articulatd to cradle 13; said cylinder 18 is articulated to one end of cradle 13. A square element 16 called counter cradle is articulated to the opposed end of the second lifting arm 15. Furthermore coun~er cradle 16 is connected to cradle 13 by means of a tie rod 17 and all these elements are shaped in such a way that counter cradle 16 moves while remaining substantially parallel to itself with respect to the variability of the system arrangement. When hydraulic cylinder 18 is not excited, the latter components herein described may be brought into the resting position as shown in fig. 1, where the second lifting arm 15 and tie rod 17 lower on the first lifting arm 11 and counter cradle 16 overlaps driver's cab 2 of the carrying vehicle with a minimum overall size. When using the lifting apparatus, the hydraulic cylinder 18 is actuated and components may be ~ 3 ~ J
raised, for example into the positions illustrated in FIGS.
14 and 16.
The first element 19 of a system of telescopic members is articulated to counter cradle 16; said element may be orientated with respect to the counter cradle 16 by means oE
a hydraulic cylinder 20, which allows element 19 to be selectively placed in any position between the horizontal one (illustrated for example in FIGS. 15 and 16) and the vertical one (illustrated for example in FIGS. 14 and 16).
Inside the first element 19 a second element 22 is inserted, guided by own rollers 23, 23' and by roller 21 of the element 19, by means of said rollers the second element 22 can telescopically slide with respect to the flrst element 19. Analogously a third element 25 is inserted in the second element Z2, guided by its own rollers 26,26' and by rollers 24 of the element 22 in order to telescopically slide with respect to the second element 22. The three elements 19, 22 and 25 are twin elements, being repeated on each side of the lifting apparatus and form a telescopic system which can be extended and lowered by means of a hydraulic cylinder 27, placed between the twin elements of the telescopic system; its ands being connected to the first element 19 and respectively to the third element 25, as particularly illustrated in FIGS. 8 to 12. By means of cylinder 27, the telescopic system 19 - 25 may be lowered as shown in FIG. 1 or more or less extended according to the necessities, up to the maximum extension of the system as shown in FIGS. 14 to 16.
The third telescopic element 25 brings at its distal end a bracket 28 articulated to a nacelle 30, whose inclination with respect to the bracket 28 may be regulated by means of ~ 3 ~ 3 a hydraulic cylinder 20. If necessary, the hydraulic cylinder 27 (which regulates -the inclination of the element 19 and therefore of the system of telescopic elements 19 25) and the hydraulic cylinder 29 (which in turn, regulates the inclination of the nacelle 30 with respect to the bracket 28 and therefore to the system of telescopic elements 19 - 25) may be reciprocally regulated in the most suitable way, so that the nacelle 30 remains substantially parallel to itself with respact to the variability of the lifting apparatus arrangement.
The lifting apparatus described herein has an extreme versatility of use, because combining the various possibilities of displacement of its parts, the nacelle 30 may be vertically and horizontally displaced within wide limits. Thus, for example, extremely extending the hydraulic cylinder 12, 20 and 27 b~lt not cylinder 18 the arrangement according to FIG. 13 is c~eated, in which the nacelle 30 is at remarkable height, almost on the vertical of the carrying vehicle, whereas also extending the hydraulic cylindex 18 the arrangement according to FIG. 14 is created, where the nacelle 30 has reached, almost on the vertical of the carrying vehicle, its maximum height.
On the contrary, if hydraulic cylinder 20 is not extended, the telescopic system 19 - 2S is horizontally arranged and its extension allows the nacelle 30 to attain a strong lateral elongation with respect to the carrying vehicle, as shown in FIG. 15 - 16, in relation to two different height levels o~ the nacelle, whether the hydraulic cylinder 18, in turn, is extended or not.
As best seen in FIG. 15 and 16 when the nacelle is laterally displaced with respect to the carrying vehicle, most part of ~ 3 ~ J`
the lifting apparatus unit is near the verti.cal passing through the vehicle; for this reason the particular arrangement of the lifting apparatus object of the present invention allows remarkable lateral displacements of the nacelle without any displacement of the centre of gravity of the system outside the perimeter of support on the ground.
In particular arrangements such as in FIG. lS a strong counterweight is created due to the second lifting arm 15 which is positioned in the direction opposite the elongation of the nacelle. Thus, by using these arrangements, a strong lateral displacement of the heavy loaded nacelle can be attained.
When the liftlng apparatus particularly reaches the lS arrangements illustrated in FIG. 15 and 16 or in FIGS. 13, 14 and/or whenever a remarkable or maximum extension of the telescopic arm 19, 22, 25 is needed, brakes means not illustrated in the present drawings, are provided to prevent any movement between said tel.escopic elements, and to block one with respect to the other, the successive telescopic elements. This device prevents the arm from swinging avoiding the consequent pendular movements of the nacelle 30.
2S Of course the invention is not limited to the arrangements herein illustrated, but many other arrangements are possib~e, by actuating only a partial extension of the various hydraulic cylinders. FIG. 17 summarize all the different possibilities of modifying the lifting apparatus arrangement, and illustrates in a bidimensional view the range of positions covered by the nacelle of the lifting apparatus. It must be understood that the range of positions herein represented is referred to a specific orientation of the turret of the lifting apparatus; said ~ 3 ~ 7 j~
turret being mounted on a rotatable thrust block, therefore the whole tridimensional range oE displacement of the nacelle is defined by a rotation solid, having its axis coincident with the axis of the thrust block and whose section is defined by the bidimensional range of positions shown in fig. 17.
As best seen in FIG. 1 the nacelle 30, in the resting position, is located behind the carrying vehicle at a very low level from the ground. This ensure the easiest approach to the nacelle before raising it.
The invention has been herein described in relation to a specific embodiment, but any modifications and replacements lS of technical equivalents are possible without departing from the ambits of the invention and from the significance of the present Patent.
Claims (6)
1. A lifting apparatus comprising a system of reciprocally articulated arm members, mounted on a vehicle and actuated by hydraulic cylinders, a nacelle connected to an upper end of said system of arm members to be lifted and displaced by it, an additional system of telescopic members actuated by hydraulic cylinders, and being rotatably inserted between the upper end of said system of arm members and said nacelle, said system of telescopic members comprising at least three elongated elements located one in the other and provided with reciprocal guide rollers, the first elongated element being articulated to the system of arm members and being connected to it by a hydraulic cylinder arranged for regulating an inclination of the system of telescopic members, and the last elongated element of the telescopic system being articulated to the nacelle and being connected to it by a hydraulic cylinder arranged for regulating the inclination of the nacelle, said system of arm members comprising a turret with respect to which a first lifting arm is articulated by means of a pair of connecting rods, the first lifting arm being connected by an actuating hydraulic cylinder to the turret, a cradle being articulated to said first lifting arm and guided by a tie rod-strut, a second lifting arm articulated to said cradle and connected to the same by an actuating cylinder, and a counter cradle articulated to said second lifting arm and guided by a tie rod, said counter cradle forming an element of the system of arm members with respect to which the system of telescopic members is articulated.
2. A lifting apparatus according to claim 1, wherein the last element of the telescopic system has a bracket deviated with respect to the axis of the telescopic system, for a nacelle to be supported.
3. A lifting apparatus according to claim 2, wherein said bracket is deviated, with respect to the axis of the telescopic system, downwardly, when said system is lowered into the resting position on the carrying vehicle.
4. A lifting apparatus according to claim 1, wherein between the elements forming the system of telescopic members, brake means are provided for mutually blocking two by two the successive telescopic members, for attaining any relevant operative position of said telescopic members, when employing the lifting apparatus.
5. Lifting apparatus according to claim 1, wherein said turret is mounted on an X-shaped rotating thrust block carried by a bed of the vehicle.
6. A lifting apparatus according to claim 1, 2, 3, 4 or 5, wherein the system of arm members is shaped in such a way that, in the resting position when mounted on the vehicle, it is lowered on a bed of the vehicle behind a driver's cab, the counter cradle is arranged over the driver's cab of the vehicle, the system of telescopic members being arranged over the system of arm members and the nacelle is arranged behind a rear end of the vehicle at a low level from the ground.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT67273-A/87 | 1987-04-03 | ||
| IT8767273A IT8767273A0 (en) | 1987-04-03 | 1987-04-03 | VEHICLE MOUNTED ELEVATOR, COMBINING ARTICULATED ARMS AND TELESCOPIC PARTS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1317555C true CA1317555C (en) | 1993-05-11 |
Family
ID=11301043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000563112A Expired - Fee Related CA1317555C (en) | 1987-04-03 | 1988-03-31 | Mobile lifting apparatus with articulating and telescoping links for a manually levellable nacelle |
Country Status (13)
| Country | Link |
|---|---|
| AR (1) | AR240160A1 (en) |
| BR (1) | BR8801611A (en) |
| CA (1) | CA1317555C (en) |
| CH (1) | CH674965A5 (en) |
| DE (1) | DE3810070A1 (en) |
| ES (1) | ES2007207A6 (en) |
| FR (1) | FR2613343B1 (en) |
| GB (1) | GB2202822B (en) |
| GR (1) | GR1000057B (en) |
| IT (1) | IT8767273A0 (en) |
| NL (1) | NL8800824A (en) |
| PT (1) | PT87103B (en) |
| SU (1) | SU1724011A3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1257064B (en) * | 1992-07-31 | 1996-01-05 | LIFTING MACHINE ASSOCIATED WITH A SELF-PROPELLED TROLLEY. | |
| CN105036018A (en) * | 2015-08-19 | 2015-11-11 | 浙江鼎力机械股份有限公司 | Crank arm type lifting device of aerial work platform |
| CN105060199A (en) * | 2015-08-19 | 2015-11-18 | 浙江鼎力机械股份有限公司 | Crank arm type aerial work platform with easily-expanded height |
| CN114920171A (en) * | 2022-05-19 | 2022-08-19 | 长沙天盾重工有限责任公司 | Transport cart |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2116842A1 (en) * | 1970-04-08 | 1971-10-21 | J Tranchero | Mobile crane designed for mounting on motor vehicles with three hydraulically controlled lifting stages |
| US3854606A (en) * | 1971-11-26 | 1974-12-17 | Cascade Corp | Vehicle with material loader |
| US3828939A (en) * | 1973-06-06 | 1974-08-13 | J Tranchero | Three-stage self-propelled crane |
| GB1515114A (en) * | 1975-08-22 | 1978-06-21 | Armfield Eng Ltd | Mobile inspection machine |
| FR2345388A1 (en) * | 1976-03-25 | 1977-10-21 | Sabria Const Metalliques Marce | Elevated working platform mounted on vehicle - has nacelle on telescopic arm extended by hydraulic ram and chains and mounted on turntable |
| IT1074573B (en) * | 1976-12-29 | 1985-04-20 | Cella Spa | EQUIPMENT FOR LIFTING PLATFORMS FOR AIR MAINTENANCE |
| US4280589A (en) * | 1980-01-31 | 1981-07-28 | Merrick John A | Elevating device |
| US4314622A (en) * | 1980-03-26 | 1982-02-09 | Lindquist William W | Extension boom for tractors having back hoe attachments |
| GB2092097B (en) * | 1981-01-12 | 1985-06-19 | Armfield Engineering Ltd | Inspection machine |
| GB2111943A (en) * | 1981-11-25 | 1983-07-13 | John Michael Harrison | Access equipment |
| IT1154479B (en) * | 1982-02-25 | 1987-01-21 | Jacques Tranchero | MACHINE TRANSPORTABLE ON A MOTOR VEHICLE SUITABLE TO ELEVATE A DIFFERENT HEIGHT CARRYCOT |
| GB2169577B (en) * | 1985-01-11 | 1988-04-20 | Univ Kazakhsky | Boom of a load-lifting device |
| US4646875A (en) * | 1985-12-30 | 1987-03-03 | Paxton-Mitchell Company | Articulated boom structure |
-
1987
- 1987-04-03 IT IT8767273A patent/IT8767273A0/en unknown
-
1988
- 1988-03-25 DE DE3810070A patent/DE3810070A1/en not_active Withdrawn
- 1988-03-25 PT PT87103A patent/PT87103B/en not_active IP Right Cessation
- 1988-03-29 GB GB8807497A patent/GB2202822B/en not_active Expired - Lifetime
- 1988-03-30 CH CH1214/88A patent/CH674965A5/it not_active IP Right Cessation
- 1988-03-30 AR AR310453A patent/AR240160A1/en active
- 1988-03-30 BR BR8801611A patent/BR8801611A/en unknown
- 1988-03-30 FR FR888804217A patent/FR2613343B1/en not_active Expired - Lifetime
- 1988-03-30 GR GR880100202A patent/GR1000057B/en unknown
- 1988-03-31 CA CA000563112A patent/CA1317555C/en not_active Expired - Fee Related
- 1988-03-31 ES ES8801236A patent/ES2007207A6/en not_active Expired
- 1988-03-31 NL NL8800824A patent/NL8800824A/en not_active Application Discontinuation
- 1988-04-01 SU SU884355589A patent/SU1724011A3/en active
Also Published As
| Publication number | Publication date |
|---|---|
| JPS642998A (en) | 1989-01-06 |
| ES2007207A6 (en) | 1989-06-01 |
| AR240160A1 (en) | 1990-02-28 |
| IT8767273A0 (en) | 1987-04-03 |
| PT87103B (en) | 1994-03-31 |
| FR2613343A1 (en) | 1988-10-07 |
| NL8800824A (en) | 1988-11-01 |
| DE3810070A1 (en) | 1988-10-13 |
| GB8807497D0 (en) | 1988-05-05 |
| GB2202822B (en) | 1990-12-12 |
| GR1000057B (en) | 1990-06-27 |
| BR8801611A (en) | 1988-11-08 |
| FR2613343B1 (en) | 1990-07-13 |
| CH674965A5 (en) | 1990-08-15 |
| SU1724011A3 (en) | 1992-03-30 |
| GR880100202A (en) | 1989-01-31 |
| PT87103A (en) | 1989-05-12 |
| GB2202822A (en) | 1988-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |