FR2794734A1 - SELF-PROPELLED TROLLEY WITH TELESCOPIC ARM AND BOOSTER - Google Patents

Abstract

This self-propelled trolley can be used for handling, lifting and earthmoving. It includes an extension (6) articulated on a chassis (4) around a horizontal axis (9), and motorized means (10, 11) controlling the articulation of the extension (6) at an angle of the order 180degre, between a folded back position, where the extension rests on a support (19), and a deployed position forward. On the extension (6) is articulated the foot (12) of a telescopic arm (7), motorized means (17, 18) controlling the articulation of the arm (7) at an angle of about 180degre, between a folded position against the riser (6) and a deployed position, aligned with the riser. The end (15) of the arm (7) carries a connecting device (24) which can receive various working equipment (27). The truck is equipped with a driving position (8), advantageously movable in height.

Description

The present invention relates to a self-propelled trolley with telescopic arm

  and extension, usable for operations or works of handling, lifting, earthworks, etc, in particular on

  building or civil engineering sites.

  Already known, by French patent N 2 457 240 (MONTGON), a self-propelled vehicle provided with stabilizers, a fixed driving cabin and a turret mounted to rotate on the vehicle chassis and supporting a telescopic arm, by l '' through a

  extension extension or "raising".

  The extension extension or raising of this machine is articulated by one end at the front of the turret, around a horizontal axis, at an angle between 0 and 100 approximately, from its folded position horizontally. The other end of the extension can be articulated, around a horizontal axis, at the foot of the telescopic arm. A lifting hook, motorized by a winch, is provided at the front end of the telescopic arm. The actuators, intended for the deployment of this structure, are simple cylinders without connecting rod assembly, comprising a cylinder mounted between the turret and the riser, and another cylinder mounted between the

  raises and the foot of the telescopic arm.

  Such a machine is well suited to handling work at height, for example load handling tasks for the construction of a building, carried out by raising the extension more or less, the telescopic arm occupying a horizontal or inclined position. However, the production of French patent N 2 457 240 has the following drawbacks and inadequacies: - The machine is limited, in its use, to the handling or lifting of loads suspended from a hook; it is not designed to receive work equipment such as a bucket, loading fork or basket, which would allow more

diversified.

  - As indicated above, the maximum angle of articulation of the extension is of the order of 100. In addition, the articulation of the telescopic arm relative to the extension is, in practice, also limited to an angle of this order, taking into account the control means provided which are jacks without crankshaft. As a result, the work area of the machine is limited; in particular, the machine is not designed to work on the rear sector

upper handling.

  - Still due to the angular limitations of the movements of the extension and of the telescopic arm, the maximum reach of the arm is limited to the substantially vertical unfolded position of the extension. - There is no provision for supporting the riser in the folded position, so that the machine cannot be used, with its riser folded, like a mobile crane with telescopic boom with identical operating characteristics to those of such

crane.

  - The cabin being fixed and located in the low position, the operator's vision is limited and handling operations require the presence of a signalman, as soon as an obstacle is present at the

cockpit level.

  French patent N 2 444 639 (POTAIN) describes another example of a self-propelled machine with telescopic arm with articulation sheath, which generally retains the same drawbacks: limitation of the articulation angles of the sheath and the arm, therefore from the field of work; limitation of use to handling

  loads suspended from a hook; insufficient visibility for the operator.

  The present invention aims to avoid all the drawbacks previously exposed, by providing a machine of the type considered, but of an improved structure and kinematics, so as in particular to optimize the work volume, while allowing very diversified uses, visibility is also greatly

improved for the operator.

  To this end, the invention relates to a self-propelled carriage with telescopic arm and extension, the extension being articulated by one end, around a horizontal axis, on a carrying frame and being articulated, by its opposite end, around another horizontal axis, at the foot of the telescopic arm, the front end of which receives work equipment, motorized means being provided for controlling the articulation of the extension relative to the chassis and the articulation of the telescopic arm relative to the extension, and a driving position being provided, this self-propelled trolley being characterized in that: the extension can be articulated on the chassis at an angle of the order of 180, between a position folded backwards and a position deployed forward , the motorized means for controlling the articulation of the riser are designed to effectively control the articulation of this riser over an angle of the order of 180, relative to the chassis, the chassis comprises support means for the riser folded back, - the foot of the telescopic arm can be articulated to the riser at an angle of the order of 180, between a folded position against the riser and a deployed position in alignment with the extension, -the motorized means for controlling the articulation of the telescopic arm are designed to effectively control the articulation of this arm at an angle of the order of 180, relative to the extension, - The front end of said telescopic arm is provided with a connecting device capable of receiving interchangeably

various work equipment.

  Thus, the invention provides a self-propelled machine with special kinematics, which combines: - an angular movement of the riser relative to the chassis of the order of 180, between a folded back position, and a deployed position front, substantially horizontal positions; -an angular movement of the telescopic arm relative to the extension which is also of the order of 180, between a position of this arm folded against the extension and a position of the same arm

  unfolded, bringing this arm in alignment with the riser.

  Articulation angles of the order of 180 can be effectively obtained by providing, according to a preferred embodiment of the invention, that the motorized means for controlling the articulation of the riser at an angle of the order of 180 are constituted by at least one cylinder device and connecting rod assembly, and in that the motorized means for controlling the articulation of the telescopic arm at an angle of the order of are also constituted by at least one cylinder device and connecting rods. Thanks to the combination of these angular deflections, the self-propelled trolley can cover a large work area, the area of which includes in the vertical plane: - a rear upper sector, the maximum envelope of which is determined by the positions "substantially horizontal enhances folded back, telescoped arm aligned with the riser "and" substantially vertical riser, telescoped arm aligned with the riser "(this sector is not covered in the current state of the art); - an upper front sector, the maximum envelope of which is determined by the positions “substantially vertical riser, telescoped arm aligned with the riser" and "substantially horizontal riser, deployed forward, telescoped arm aligned with the riser"; this cover being greater than that of the prior art, taking into account the fact that the riser occupies a substantially horizontal deployed position; a lower front sector, the maximum envelope of which is determined by the positions "substantially horizontal riser, deployed forward, telescoped arm aligned with the extension "and" substantially horizontal extension, deployed forward, telescoped arm substantially vertical, directed towards the arm "; this coverage is greater than that of the existing technique, taking into account that the extension occupies a deployed position substantially horizontal; a rear lower sector, the envelope of which is determined By positions enhances substantially horizontal deployed forward, arm telescoped substantially vertical, downwardly directed "and. substantially horizontal riser, deployed forward, telescoped arm in an inclined position, under the riser "(the latter sector not being covered

in the state of the art).

  The possibilities of variable inclination of the extension relative to the chassis, combined with the variable inclination of the arm relative to the extension and the telescoping of the arm, make it possible to cover the total area of each of the four sectors previously defined, therefore serve everything

  point in the previously defined work area.

  In addition, in the case where the extension is articulated, by its first end, on the front of a rotating frame or, turret orientable around a vertical axis relative to a base frame of the self-propelled carriage, the structure and the kinematics of the machine cover the total volume generated by the rotation of the work area

  previously defined, around a vertical axis.

  Furthermore, the mechanical support of the riser, in its folded back position, allows the work of the telescopic arm alone, with characteristics identical to those of a conventional self-propelled carriage with telescopic arm, devoid of riser. Thus, the folded position of the riser is not a simple transport position, but also a

real working position.

  The support of the extension on the chassis can be a simple guided support, in general sufficient; in one embodiment, the support means comprise, on the chassis, vertical elements in the shape of a U "with lateral guides, which cooperate with a horizontal crosspiece fixed on the rear face of the riser, in the region of the second

  end of this extension, on which the telescopic arm is articulated.

  As a variant, it can also be a real blocked support, preventing the raising of the extension, for example by means of folded hooks

  and locked on said crosspiece.

  According to another advantageous characteristic, the driving position of the self-propelled trolley is configured in a driving cabin, mounted movable in height on the chassis by means of a deformable parallelogram structure, motorized by at least one jack, making it possible to move the cab between a low position and a high position. Advantageously, the high position of the cabin is located substantially at the end of the extension to which the telescopic arm can be articulated, when the extension occupies its substantially vertical position. The operator of the machine can thus benefit, at any time, from an optimal field of vision on the load to be handled, or on the work equipment. According to an additional arrangement, the motorized position control in height of the cabin is coupled to the raising control of the riser, to continuously adjust and

  the operator's field of vision.

  Furthermore, the connection device, provided at the front end or head "of the telescopic arm, can receive various working equipment, such as in particular fixed hook or lifting winch, fork, bucket, gondola, etc., which can be brought to any point in the area of

previously defined work.

  Thus, overall, the self-propelled cart object of the invention is suitable for multiple and diverse uses, carried out in a large work area, including the upper and lower rear sectors, relevant for particular applications. In all these uses, there is a significant increase in the range of the machine, thanks to the large clearance of the extension and the possibilities of use with alignment of the extension and the telescopic arm, this not excluding the possibility work with the telescopic arm alone, the riser remaining folded. The vertical mobility of the cabin provides, in all types of uses and all positions of the riser, excellent visibility. Finally, the folding and telescoping functions allow the machine to be placed in a space-saving transport configuration, the driving cabin then being lowered, for the road movement of the

self-propelled trolley.

  In any case, the invention will be better understood using the

  description which follows, with reference to the attached schematic drawing

  representing, by way of example, an embodiment of this self-propelled cart with telescopic arm and heightening, and illustrating the possibilities of using such a machine: FIG. 1 is a side view of a self-propelled cart conforming to the present invention, the riser and the arm being in the folded transport position; 2 shows the enlarged detail A of Figure 1, showing in particular the support means for the raised folded backwards; Figure 3 is a side view illustrating the general kinematics of this self-propelled carriage; Figure 4 illustrates positions of use of the machine with raised folded back; Figure 5 illustrates other positions of use, with extension deployed horizontally forward, or deployed vertically; Figure 6 illustrates yet other positions of use, allowing work below the support plane of the self-propelled cart; Figure 7 illustrates the possibilities of using this trolley

self-propelled with a nacelle.

  The self-propelled trolley, shown in particular in FIGS. 1 and 2, has a base chassis 1 mounted on pneumatic wheels 2, and provided with stabilizers 3. On the base chassis 1 is mounted a rotating chassis 4, orientable around an axis vertical 5 which, in the example illustrated, passes through the center of the base chassis 1. The rotating chassis 4 carries an articulated structure composed of an extension 6 and a telescopic arm 7. On this rotating chassis 4 is also mounted a cabin

driving 8.

  The extension 6, consisting of a box beam, has a first end which is articulated, around a horizontal axis 9, at the front of the rotating frame 4. The extension 6 is also connected to the rotating frame 4 by an assembly motorized, consisting of a jack 10 and a

  connecting rod 11. The articulation around the axis 9, and the motorized assembly 10-

  11, allow a rotation of the extension 6 over an angle of the order of, between two extreme positions, one substantially horizontal in which the extension 6 is folded back, and the other also substantially horizontal, but in which the extension 6 is deployed

forward.

  The telescopic arm 7 is made up of several successive elements, for example a first element 12 called the foot, an intermediate element 13 and a terminal element 14, provided, at its front end, with a head 15. The foot 12 of the telescopic arm 7 is articulated, around a horizontal axis 16, at the second end of the extension 6. This foot 12 is also connected to the extension 6 by a motorized assembly, composed of a jack 17 and a connecting rod 18. L 'articulation around the axis 16, and the motorized assembly 17-18, allow rotation of the telescopic arm 7, relative to the extension 6, over an angle of about 180, between two extreme positions; in one of its extreme positions, the telescopic arm 7 is folded against the riser 6, while in its other extreme position, the telescopic arm 7 is deployed in alignment with

the extension 6.

  The rotating chassis 4 has, at the rear, a structure

  support 19 for the extension 6, a structure which is clearly visible in FIG. 2.

  The support structure 19 comprises vertical elements 20 in the shape of a U ", which cooperate with a horizontal crosspiece 21 fixed on the rear face 22 of the extension 6, near the second end of this

  extension 6, therefore of the hinge pin 16 of the telescopic arm 7.

  The driving cabin 8 is mounted movable in height on the rotating chassis 4, by means of a deformable parallelogram structure which comprises connecting rods 23 articulated on the vertical elements 20 of the support structure 19. This parallelogram structure deformable is motorized by a cylinder, not shown. The cabin 8 can thus be moved between a low position (Figures 1 and 4) and a high position (Figure 5), with the possibility of occupying intermediate positions (Figures 6 and 7). The vertical displacement plane of the cabin 8 is located on the side of the displacement plane of the riser 6 and

of the telescopic arm 7.

  The head 15 of the telescopic arm 7 is provided with a connecting device 24, intended to receive various interchangeable working equipment, thus fixed to the front end of the arm 7. The working equipment can in particular be a bucket 25 (Figures 2 and 6), a fixed hook or a lifting winch 26 (figure 3), a fork 27 (figures 4, 5 and 6)

  or a personnel lifting platform 28 (FIG. 7).

  In the folded transport position, as shown in FIG. 1, the extension 6 is lowered substantially horizontally, and it rests on

  the support structure 19. The telescopic arm 7 is retracted, and folded over

  above the riser 6. The cabin 8 is lowered, and is located at the front of the rotating frame 4, on the side of the riser 6 and of the arm 7. In addition, in the use illustrated here, the head 15 of the arm 7 and bucket 25 take

  place in front of the base frame 1.

  FIG. 3 illustrates the general kinematics of the extension 6 and of the telescopic arm 7, resulting from their respective deflections allowed by their articulation axes 9 and 16. Referring here to a handling application, the combination of these deflections makes it possible to cover four separate handling sectors, designated I to IV, namely: - a rear upper handling sector I, the maximum envelope of which is determined by the position "substantially horizontal extension 6 folded backwards, arm 7 telescoped and aligned with the extension 6 "and by the position" vertical extension 6, arm 7 telescoped and aligned with the extension 6 "; - An upper front handling sector II, the maximum envelope of which is determined by the previous final position and by the position "substantially horizontal riser 6 deployed forward, arm 7 telescoped and aligned with the riser 6"; - A lower sector before handling III, the maximum envelope of which is determined by the previous final position and by the position "substantially horizontal riser 6 deployed forward, arm 7 telescoped and substantially vertical, directed downward"; - A lower rear IV handling sector, the envelope of which is determined by the previous final position and by the substantially horizontal "raising 6" position deployed forward, arm 7 telescoped and in an inclined position so as to extend under the raises 6 "(the maximum inclination of the arm 7 with respect to the vertical is theoretically 90, but it

  is in practice limited by the environment).

  The articulation of the extension 6 and / or of the arm 7, and the telescoping of this arm 7, make it possible to cover the total area of each of the sectors 1, II, III and IV, as illustrated by the intermediate positions indicated on Figure 3, as well as the arrows F here symbolizing the telescoping movement. The addition of the four sectors, previously

  defined, determines a vertical handling plane (plane of Figure 3).

  The orientation of the rotating chassis 4 around the vertical axis 5 generates, at

  from this plan, a certain volume of handling.

  FIG. 4 illustrates, more precisely, the use of the self-propelled carriage with its extension 6 folded back, and resting on the support structure 19 present at the rear of the rotating chassis 4. The arm 7 can here pivot, around the horizontal axis 16 kept fixed, between a substantially horizontal position and a substantially vertical position, this arm 7 being able, moreover, to be telescoped. The self-propelled trolley can thus be used as a machine with a single telescopic arm, for example for the

  handling of a load 29 placed on a fork 27.

  The self-propelled trolley can also be used, as shown in FIG. 5, with its extension 6 deployed vertically, the telescopic arm 7 being able to have a variable inclination, and to be more or less

  telescope. The machine can thus ensure the distribution of a load 29 to-

  above a low building 30, or beyond an obstacle such as a wall. In this position of use, the cabin 8 is advantageously brought to the high position, substantially at the level of the upper end of the riser 6, the operator's vision axis 31 then passing over the building 30 or other obstacle, so as to keep the direct vision of

  the load 29 during the handling thereof.

  As also shown in FIG. 5, the self-propelled carriage is still usable with its extension 6 deployed horizontally forwards, and extended by the telescopic arm 7, aligned horizontally with this extension 6. This position of use allows the distribution

  of a load 29 through an opening 32 of a building 30.

  FIG. 6 illustrates other possibilities of use, enabling work to be carried out below the support plane 33 of the self-propelled trolley. Thus, with the extension 6 deployed forward, and the telescopic arm 7 directed downward (drawn in phantom), it is possible to distribute a load 29 at the bottom of an excavation 34. With the extension 6 maintained in inclined position, and the telescopic arm 7 folded over this extension 6 (drawn in solid lines), it is possible to move the bucket 25 on an inclined plane 35, for earthworks: construction of an inclined structure (road embankment , canal bank, dam), excavation. Of course, depending on the work equipment carried by the telescopic arm 7, it is also possible to carry out the handling of rubble,

  pallets of materials, concrete, etc. along the inclined plane 35.

  Finally, FIG. 7 illustrates the possibilities of using the self-propelled trolley, equipped with a nacelle 28 kept horizontal, on which one or more people can take place. The nacelle 28 allows work at height, in the upper rear I and front II sectors (as previously defined), for example for the installation of frames or the cladding of buildings, even in narrow bays not allowing

  the complete rotation of the rotating chassis 4 around the vertical axis 5.

  As illustrated in FIG. 7, it is also possible, by bringing the nacelle 28 into the lower rear sector IV, to carry out the inspection of the batteries 36 of the deck 37 of a bridge 38, the self-propelled carriage being positioned on the bridge

38 himself.

  It goes without saying that the invention is not limited to the sole embodiment of this self-propelled trolley with telescopic arm and extension which has been described above, by way of example; on the contrary, it embraces all of the variant embodiments and applications respecting the same principle. In particular, we would not depart from the scope of the invention: by making the "load-bearing" part without a rotating frame or turret, in which case the extension is articulated directly on the base frame; - by making the base frame without stabilizers - by making the extension in the form of a lattice structure, instead of a box structure; - by providing an extension made up of two or more telescopic elements, making it possible to increase its height; by modifying the support structure of the riser, in particular by adding means for locking the riser in its folded back position; by modifying the motorization of the articulations of the riser on the chassis, and / or of the telescopic arm on the riser, in particular by providing, for an articulation, two symmetrical assemblies with jack and connecting rods, arranged on either side of the articulation and operating simultaneously, this for reasons of power or bulk; - by coupling the cabin lift control with the lift lift control, without excluding the possibility of voluntary decoupling; by adapting any type of work equipment on the head of the

telescopic arm.

Claims (7)

  1 - Self-propelled trolley with telescopic arm and extension, the extension (6) being articulated by one end, around a horizontal axis (9), on a carrying frame (4) and being articulated, by its opposite end, around another horizontal axis (16), at the foot (12) of the telescopic arm (7) whose front end (15) receives working equipment, motorized means being provided for controlling the articulation of the riser (6) relatively to the chassis (4) and the articulation of the telescopic arm (7) relative to the riser (6), and a driving position (8) being provided, characterized in that: -the riser (6) can be articulated on the chassis (4) on an angle of the order of 180, between a position folded back and a position deployed forward, - the motorized means (10, 11) for controlling the articulation of the riser (6 ) are designed to effectively control the articulation of this extension (6) at an angle of the order of 180, relative ive to the chassis (4), -the chassis (4) comprises support means (19) for the extension (6) folded back, -the foot (12) of the telescopic arm (7) is articulated to the riser (6) at an angle of around 180, between a folded position against the riser (6) and a deployed position in alignment with the riser (6), -the motorized control means (17, 18) of the articulation of the telescopic arm (7) are designed to effectively control the articulation of this arm (7) at an angle of the order of 180, relative to the extension (6), and the front end (15) of said telescopic arm (7) is provided with a connecting device (24), adapted to receive interchangeably various working equipment (25, 26, 27, 28). 2 - Self-propelled trolley according to claim 1, characterized in that the motorized means for controlling the articulation of the riser (6) at an angle of the order of 180 are constituted by at least one jack device (10) and connecting rod assembly (11), and in that the motorized means for controlling the articulation of the telescopic arm (7) at an angle of the order of 180 are also constituted by at least one   cylinder device (17) and connecting rod assembly (18).   3- self-propelled trolley according to claim 1 or 2, characterized in that the extension (6) is articulated, by its first end, on the front of a rotating frame (4) orientable around an axis   vertical (5) with respect to a base frame (1) of the self-propelled cart.   4- Self-propelled trolley according to any one of   Claims 1 to 3, characterized in that the support means (19) of the   riser (6) folded back comprises, on the chassis (4), vertical elements (20) in the shape of a "U" with lateral guides, which cooperate with a horizontal crosspiece (21) fixed on the rear face (22 ) of the extension (6), in the region of the second end of this   riser (6), on which the telescopic arm (7) is articulated.   - Self-propelled trolley according to any one of   Claims 1 to 4, characterized in that the support means (19) of the   riser (6) folded backwards provide a secure support, preventing raising of the extension (6).   6 - Self-propelled trolley according to any one of   Claims 1 to 5, characterized in that his driving position is   shaped as a driver's cabin (8), mounted movable in height on the chassis (4) by means of a deformable parallelogram structure (23), motorized by at least one jack, making it possible to move   the cabin (8) between a low position and a high position.   7 - Self-propelled trolley according to claim 6, characterized in that the high position of the cabin (8) is located substantially at the end of the extension (6) to which the telescopic arm (7) is articulated, when the riser (6) occupies its position substantially vertical.   8 - Self-propelled trolley according to claim 6 or 7, characterized in that the motorized control of the height position of   the cabin (8) is coupled to the raising control of the riser (6).   9 - Self-propelled trolley according to any one of   Claims 1 to 8, characterized in that the work equipment received   by the connecting device (24), provided at the front end (15) of the telescopic arm (7), is a fixed hook or a lifting winch (26), a   fork (27), a bucket (25) or a nacelle (28).