EP1024108B1 - Device for the transposition-control of a carrying structure of a vehicule - Google Patents

Description

The invention relates to the technical field of self-propelled machines of lifting and handling.

• les grues mobiles;
• les chariots de manutention.

Among these self-propelled machines, there are in particular:

• mobile cranes;
• handling carts.

The invention relates more particularly to handling carts.

• d'un châssis ; et
• soit d'un mât d'inclinaison variable sur lequel coulissent tablier, porte-fourche et fourche, avec possibilité de rallonge et d'équipements divers tels que bennes, pelles, etc., fixés sur un porte-outils;
• soit d'une flèche télescopique supportant le porte-outils.

These trolleys generally consist of:

• a chassis; and
• either of a mast of variable inclination on which slide apron, fork holder and fork, with possibility of extension and various equipment such as tippers, shovels, etc., fixed on a tool holder;
• or a telescopic boom supporting the tool holder.

If necessary, the mast or the telescopic boom can be adjustable.

Examples of such self-propelled carts of the prior art can be found in the following documents: FR-2 091 898, FR-2 287 411, FR-2 287 413, FR-2 563 204, FR-2 545 468, FR-2 527 992, EP-415 608, EP-36 455, EP-228 208, EP-312 390, EP-415 608, EP-577 388, EP-927 698, US-3,178,046, US-3,270,899, US-3,184,086, US-3,198,359, US-3,670,910, US-3 688 929, US-3 937 339, US 3 967 744, US-3 985 248, US-4 034 875, US-4,147,263, US-4,553,899, US-4,632,630, US-4,674,944, US-4,744,718, US-4,822,237, US-4,964,778, US-5,106,257.

In recent years, have appeared on the market of self-propelled trucks load offset with the telescopic arm in the lowered position, significantly below the driver's line of sight, this position lowered allowing improved circular visibility to the driver seated in the driver's cabin.

Such carriages include a cabin containing the driving position and a powertrain, located on either side of the telescopic arm, the axis substantially horizontal articulation of the arm being placed as low as possible to improve lateral visibility of the operator when the arm is in position lowered.

Examples of such self-propelled trucks with improved visibility can be found in the following documents: EP-656,315, FR-2,713,155, EP-680,923, EP-681,068, EP-692,448, EP-325,064, US-3,836,025, US-5,199,861, US-5,478 192, WO-89 00972, DE-27 39537, DE-27 39325.

The invention relates more particularly, but not exclusively, to self-propelled trucks with improved visibility for the driver, of the type shown above.

In self-propelled carts known from the prior art, devices for slope correction are generally provided, these devices making it possible to rotate the carriage frame relative to a longitudinal direction.

These superelevation correction devices conventionally include at less a double-acting cylinder, movable relative to the chassis of the carriage around of a substantially longitudinal and movable axis relative to a front axle or rear of the carriage along an axis formed at the end of the piston of the double cylinder effect.

In certain self-propelled carts known from the prior art, devices allowing a lateral offset of the load are provided.

Document US-4 679 803 describes a device for modifying the center effective gravity of a mobile land vehicle having an oscillating assembly.

The device according to document US-4 679 803 also makes it possible to maintain the cabin of the assembly oscillating in a substantially horizontal plane on steep terrain.

To this end, the device comprises, between a platform and a frame arranged on the vehicle tracks, four non-parallel connections and four cylinders.

These links are connected to the platform and the frame by multi-directional links. They are inclined at an acute angle open upwards by compared to the vertical.

The four cylinders connect the links two by two and form an acute angle with the horizontal axis of the vehicle.

Such a device has the disadvantage of requiring many parts in movement and friction, which promotes wear.

Furthermore, the coexistence of tilt and offset correction devices lateral load in self-propelled trucks poses many problems techniques which have only been imperfectly treated to date.

If the implementation, in use of the carriage, of a high lateral offset implies a slope correction to preserve the stability of the truck, the driver must most often ensuring itself the adjustment of the lateral offset and the correction superelevation, using separate commands.

Conversely, if it proves necessary, when using the trolley, to use a high tilt angle adjustment value, a parasitic lateral offset is obtained, lateral offset which must be compensated for the tool holder to be properly arranged for its use.

The object of the invention is to propose a device making it possible to remedy the disadvantages of the cited prior art.

In particular, the invention relates to a device allowing control single, manual or automatic, of the two correction movements of cant and lateral offset, these two movements can be used functionally independently of each other.

To this end, the invention relates, according to a first aspect to a device for control of the relative displacement of the bearing structure of a rolling vehicle relative to an axle of said machine, the device comprising a rigid frame integral with said axle, this rigid frame being articulated to the bearing structure of the machine, control means allowing the rotation of the horizontal plane means of the carrying structure of the machine with respect to the mean horizontal plane rigid frame integral with said axle, said axle not being directly attached to the supporting structure of the machine

• deux biellettes articulées, à une première partie extrême haute, en rotation autour d'axes sensiblement parallèles, par rapport à la structure portante ou châssis de l'engin
• deux poutres sensiblement parallèles par rapport auxquelles les biellettes sont articulées en rotation, autour d'axes aux secondes parties extrêmes, basses, de ces biellettes;
• des moyens d'association desdites poutres audit essieu, les axes du châssis et les axes du cadre rigide solidaire de l'essieu étant parallèles entre eux afin d'assurer la fonction de la rotation du plan horizontal moyen de la structure portante de l'engin par rapport au plan horizontal moyen du cadre ridige solidaire de l'essieu.

The rigid frame includes:

• two articulated rods, at a first high end part, in rotation about substantially parallel axes, relative to the supporting structure or chassis of the machine
• two substantially parallel beams with respect to which the connecting rods are articulated in rotation, around axes at the second extreme, low, parts of these connecting rods;
• means for associating said beams with said axle, the axes of the chassis and the axes of the rigid frame integral with the axle being parallel to one another in order to ensure the function of the rotation of the mean horizontal plane of the bearing structure of the machine with respect to the mean horizontal plane of the ridige frame secured to the axle.

In one embodiment, each link is provided with a body with two axes of parallel rotation, each upper axis of rotation corresponding to an axis of rotation of the rods relative to the bearing structure, and each lower axis of rotation corresponding to an axis of rotation of the beams with respect to rods.

The spacing of the upper axes of rotation of the rods is greater than the spacing of the lower axes of rotation of these links, these links being inclined at an angle α open upwards with respect to the median plane P of the bearing structure of the machine, when the two planes defined by the axes upper and lower are parallel.

The angle α is between a few degrees and about 30 degrees.

The means for controlling the movement of the rigid frame relative to the bearing structure of the machine comprise a single cylinder articulated in rotation about an axis substantially parallel to the axes of high articulation of the rods, the single cylinder being articulated in rotation around a lower axis substantially parallel to the lower articulation axes of the rods.
The cylinder is inclined at an angle β of between a few degrees and 60 degrees relative to the mean plane of the bearing structure, when the two planes defined by the axes of high and low articulation of the rods are parallel.

The device is attached by assembly to a supporting structure or chassis conventional, in one embodiment.

The device is arranged on the extreme front part of the supporting structure of a rolling machine.

The invention relates according to a second aspect, to a rolling vehicle provided at least one device as defined below.

The machine comprises, in one embodiment, a front axle and a rear axle with wheels driving and guiding.

• l'engin comprend un bras de levage mobile en rotation autour d'un axe sensiblement horizontal ;
• l'engin comprend des moyens d'entraínement disposés latéralement, le poste de pilotage étant placé à l'opposé des moyens d'entraínement;
• l'engin comprend au moins deux stabilisateurs solidaires du cadre rigide;
• l'engin comprend une structure porteuse en forme de poutre caisson, à la partie extrême avant de laquelle est placé le dispositif de contrôle de déplacement du cadre formant faux châssis par rapport à la poutre caisson;
• l'engin comporte un bras de levage télescopique, le dispositif de contrôle du déplacement du cadre formant faux châssis par rapport à la structure porteuse permettant en combinaison la correction de dévers et le déport latéral de la charge par le biais d'un seul mécanisme.

According to several variants, possibly combined with each other:

• the machine comprises a lifting arm movable in rotation about a substantially horizontal axis;
• the machine comprises drive means arranged laterally, the cockpit being placed opposite the drive means;
• the machine comprises at least two stabilizers integral with the rigid frame;
• the machine comprises a support structure in the form of a box beam, at the extreme front part of which is placed the device for controlling the movement of the frame forming a false chassis relative to the box beam;
• the machine comprises a telescopic lifting arm, the device for controlling the movement of the frame forming a false chassis relative to the carrying structure allowing in combination the correction of slope and the lateral offset of the load by means of a single mechanism.

• les figures 1 à 16, prises successivement, représentent différentes étapes possibles pour le montage d'un faux châssis à biellettes et stabilisateurs, à l'avant d'un châssis de chariot automoteur,
  • la figure 1 étant une vue de côté du châssis seul;
  • la figure 2 étant une vue de face correspondant à la figure 1;
  • la figure 3 étant une vue analogue à la figure 1, deux biellettes étant montées en partie avant du châssis;
  • la figure 4 étant une vue de face correspondant à la figure 3;
  • la figure 5 étant une vue analogue à la figure 3, après mise en place d'un faux châssis;
  • la figure 6 étant une vue de face correspondant à la figure 5;
  • la figure 7 étant une vue analogue à la figure 5, après mise en place du vérin de commande entre le faux châssis et la partie avant du châssis;
  • la figure 8 étant une vue de face correspondant à la figure 7;
  • la figure 9 étant une vue analogue à la figure 7, après mise en place du pont avant;
  • la figure 10 étant une vue de face correspondant à la figure 9;
  • la figure 11 étant une vue analogue à la figure 9, après mise en place des stabilisateurs, les stabilisateurs étant représentés en position baissée;
  • la figure 12 étant une vue de face correspondant à al figure 11;
  • la figure 13 étant une vue analogue à la figure 11, les stabilisateurs étant représentés en position levée;
  • la figure 14 étant une vue de face correspondant à la figure 13;
  • la figure 15 étant une vue en perspective correspondant aux figures 11 et 12, seule la partie avant du châssis étant représentée avec l'ensemble biellettes-faux châssis, vérin de commande, stabilisateurs;
  • la figure 16 étant une vue en perspective éclatée correspondant à la figure 15;
• les figures 17 à 20 illustrent les capacités de déport latéral et de correction de dévers induites par un dispositif selon l'invention,
  • la figure 17 étant une vue en perspective correspondant à la figure 15, le dispositif selon l'invention étant dans une position de débattement maximum, dans la configuration considérée;
  • la figure 18 étant une vue de face correspondant à la figure 17;
  • la figure 19 étant une vue avant d'une machine de manutention, de type chariot automoteur à bras télescopique, le bras étant en position extrême relevée et télescopée, l'angle de débattement étant figuré pour la configuration du dispositif selon l'invention installé sur le chariot automoteur ;
  • la figure 20 étant une vue de dessus de la machine représentée en figure 19, le bras étant en position extrême télescopée et horizontal, l'angle de débattement dans cette position du bras étant figuré;
  • la figure 21 est une vue en perspective faussée de la partie avant de la machine représentée en figures 19 et 20, le bras étant en position extrême abaissée et non télescopée, le vérin de commande reliant le châssis et le faux châssis n'étant pas figuré pour des raisons de lisibilité.

Other objects and advantages of the invention will appear during the following description of embodiments, which description will be made with reference to the accompanying drawings, in which:

• FIGS. 1 to 16, taken successively, represent different possible steps for mounting a false chassis with links and stabilizers, at the front of a chassis of a self-propelled trolley,
  • Figure 1 being a side view of the chassis alone;
  • Figure 2 being a front view corresponding to Figure 1;
  • Figure 3 being a view similar to Figure 1, two rods being mounted in the front part of the chassis;
  • Figure 4 being a front view corresponding to Figure 3;
  • Figure 5 being a view similar to Figure 3, after installation of a subframe;
  • Figure 6 being a front view corresponding to Figure 5;
  • Figure 7 being a view similar to Figure 5, after installation of the control cylinder between the subframe and the front part of the chassis;
  • Figure 8 being a front view corresponding to Figure 7;
  • Figure 9 being a view similar to Figure 7, after installation of the front axle;
  • Figure 10 being a front view corresponding to Figure 9;
  • FIG. 11 being a view similar to FIG. 9, after the stabilizers have been put in place, the stabilizers being shown in the lowered position;
  • Figure 12 being a front view corresponding to al Figure 11;
  • Figure 13 being a view similar to Figure 11, the stabilizers being shown in the raised position;
  • Figure 14 being a front view corresponding to Figure 13;
  • FIG. 15 being a perspective view corresponding to FIGS. 11 and 12, only the front part of the chassis being shown with the rod-subframe, control jack, stabilizers assembly;
  • Figure 16 being an exploded perspective view corresponding to Figure 15;
• FIGS. 17 to 20 illustrate the capacities of lateral offset and of tilt correction induced by a device according to the invention,
  • FIG. 17 being a perspective view corresponding to FIG. 15, the device according to the invention being in a position of maximum clearance, in the configuration considered;
  • Figure 18 being a front view corresponding to Figure 17;
  • FIG. 19 being a front view of a handling machine, of the self-propelled trolley type with telescopic arm, the arm being in the raised and telescoped extreme position, the angle of movement being shown for the configuration of the device according to the invention installed on the self-propelled cart;
  • FIG. 20 being a top view of the machine shown in FIG. 19, the arm being in the extreme telescoped and horizontal position, the angle of movement in this position of the arm being shown;
  • Figure 21 is a distorted perspective view of the front part of the machine shown in Figures 19 and 20, the arm being in the lowered extreme position and not telescoped, the control cylinder connecting the chassis and the subframe not being shown for readability reasons.

It is understood that FIGS. 1 to 16, taken successively, are given in order ensure, in addition to the description, an easy understanding of a embodiment of the invention and illustrate only one possible succession steps for mounting a device according to the invention, in no way limiting.

The expression "false chassis" used in this description is irrelevant with that used in the automotive field to designate a framework metallic connecting the bodies of the ground connection as a chassis would but which does not have the rigidity and on which the body is fixed by through silent blocks.

• elle désigne ici un ensemble de pièces mécaniques reliées directement au pont avant, pont avant qui est, dans l'art antérieur, conventionnellement rattaché au châssis par les éléments de suspension avant, d'où l'emploi du terme «châssis»;
• cet ensemble de pièces n'a pas pour fonction de supporter le moteur, la transmission et la carrosserie, à la manière d'un châssis, d'où au total, l'expression «faux châssis»;
• cet ensemble de pièces peut être adapté sur un châssis traditionnel.

This expression is used here insofar as, as will appear later:

• it designates here a set of mechanical parts directly connected to the front axle, front axle which is, in the prior art, conventionally attached to the chassis by the front suspension elements, hence the use of the term "chassis";
• this set of parts does not have the function of supporting the engine, the transmission and the bodywork, in the manner of a chassis, hence the expression "false chassis" in total;
• this set of parts can be adapted on a traditional chassis.

We first refer to Figures 1 and 2. In these figures, a chassis 1 produced in the form of a self-supporting beam.

In other embodiments, not shown, the chassis 1 can be of more traditional design and include for example a rigid frame in bending and twisting formed of beams, crosspieces and spacers.

The chassis in the form of a box beam shown in FIG. 1 can be, as the case if necessary, assembled by tenons and mortise.

The chassis shown in Figure 1 has, on its lateral flanks substantially vertical 2, 3 of the openings 4.

These openings 4 can allow the passage of the control hoses electric, hydraulic, or pneumatic of the various organs of the handling.

If necessary, mechanical transmission members can pass to the through openings 4.

The chassis box beam may contain part of the control relays, mechanical or hydrostatic transmission means and ensuring relative protection of these elements against shocks.

The chassis comprises in the rear part, a hinge pin 5 substantially horizontal for the lifting arm.

In other embodiments, not shown, the lifting arm is not not only articulated in rotation along a horizontal axis relative to the chassis but can also rotate relative to the chassis along an axis substantially vertical.

To this end, the horizontal axis of inclination of the arm can be mounted on a flat rotatable in relation to the chassis and assembled on top of it, as it is practiced for mobile cranes.

In another embodiment, the horizontal lifting or leaning axis of the arm is supported by a turret located at the rear end of the chassis and movable relative to this chassis around an axis substantially perpendicular to the pivot axis of the arm.

The chassis has, at the front end, two pairs of pin holes 6, 7, arranged symmetrically with respect to the median vertical plane P to the chassis 1.

Each pair of axis holes 6, 7 defines an axis 8, 9 of articulation, the two axes 8, 9 being parallel.

The front end of the chassis has a general shape of an open U down, when viewed from the side.

The base of this U is formed by a substantially planar sheet 10 whose width l ₁₀ is greater than the average width of the box beam.

Flanges 11, 12, substantially perpendicular to the sheet 10 form the substantially parallel branches of the U and support, laterally, the holes axis 6, 7.

Substantially a third of the width l ₁₀ of the sheet 10, a hinge pin 13 of the jack is defined by two supports 14, 15 projecting from the sheet 10, downwards.

Those skilled in the art will understand that the axis 13 can be located on one side or the other of the median plane P of the chassis, as will appear later.

In the embodiment shown, the axis 13 is placed on the left side of the plane P when the chassis is seen from the front.

The axis 13 is parallel to the articulation axes 8, 9 defined above and is placed below the plane R containing these axes 8, 9.

The supports 14, 15 are rigidly assembled to the sheet 10 in a position such that the median plane P 'to the supports 14, 15 is substantially vertical and at mid-length L ₁₀ of the part of the sheet 10 which projects laterally from the side and on the other side of the box beam.

The lower front part of the box beam has a semi-arc shape 16 open down for the passage of the front deck, as it will appear by the after.

We now refer to Figures 3 and 4.

Two rods 17, 18 are mounted mobile in rotation around the axes hinge 8, 9.

More specifically, each link 17, 18 is provided with a body 19 in two axes of rotation 20, 21 parallel, the upper axis 20 being associated with the holes axes 6, 7, the lower axis 21 being associated with the subframe, as will be described more fully below.

Thus, each upper axis 20 corresponds to an axis (8,9).

The body 19 of the rods can be pierced with a through hole 22, elliptical in the embodiment shown.

We now refer to Figures 5 and 6.

As has been said, the lower axes 21 of the rods 17, 18 are mounted movable in rotation relative to a false chassis 23.

• deux parties latérales 24, optionnelles, d'articulation de stabilisateurs;
• un premier flasque 25 d'articulation des biellettes 17, 18, ce premier flasque 25 étant pourvu à cette fin de trous d'axe 26;
• un deuxième flasque 27 d'articulation de biellettes 17, 18, ce deuxième flasque 27 étant pourvu à cette fin de trous d'axe 28; les axes 29, 30 définis par les trous d'axes 26, 28 étant parallèles et écartés d'une largeur l'inférieure à celle correspondant à l'écartement I des axes 8, 9 d'articulation supérieure des biellettes 17, 18.

This false chassis comprises, in the embodiment shown, when viewed from the side, from one edge to the other:

• two lateral parts 24, optional, of articulation of stabilizers;
• a first flange 25 of articulation of the rods 17, 18, this first flange 25 being provided for this purpose with pin holes 26;
• a second flange 27 of articulation of links 17, 18, this second flange 27 being provided for this purpose with pin holes 28; the axes 29, 30 defined by the axis holes 26, 28 being parallel and spaced apart by a width less than that corresponding to the spacing I of the axes 8, 9 of upper articulation of the links 17, 18.

So that when the plane R 'containing the axes 29, 30 is parallel to the plane R containing the axes 8, 9, the links 17, 18 are inclined at an open angle α to the top.

Thus, each lower axis 21 of the links 17, 18 corresponds to an axis 29, 30.

In the embodiment shown, this angle a is substantially equal to 10 degrees.

The first flange 25, the second flange 27 and, where appropriate, the parts articulation 24 of the stabilizers are supported by two beams 31, 32 parallel, of circular section in the embodiment shown.

These beams 31, 32 are spaced apart by a width substantially equal to that separating the axes 8, 9 of upper articulation of the links 17, 18.

The first flange 25 has, in front view, a general form of bone, the middle part being narrower than the two extreme parts.

The first flange 25 is substantially symmetrical relative to a plane median perpendicular to the large faces of this flange.

In addition to the elements shown above, the subframe 23 includes rear part two angles 33 of U-shaped section open towards the rear.

Each angle iron 33 has two support and assembly walls 34, 35, parallel and forming the branches of the U-section, these walls being perpendicular to the second flange 27.

A third flange 36, substantially parallel to the first and second flange 25, 27 is interposed between these first and second flange 25, 27 and comes to form the base of the U-shaped profiles of the two lateral angles 33.

The two lateral angles 33 are intended for assembling the front axle to the subframe as shown in Figures 9 and following.

Between the first flange, before 25 and the third flange 36, one of the beams 31, 32 of the subframe 23 is provided with an axle support 37, 38, projecting, for the lower articulation of the control jack shown in Figures 7, 8 especially.

As was said above with reference to Figure 1, the axis of articulation upper 13 of the control cylinder can be arranged on one side or the other of the median plane P.

Likewise, the lower articulation axis 39 of the control jack, defined by the protruding parts 37, 38 on one of the beams 31, 32 of the subframe can be arranged on one side or the other of the median plane P ".

In the embodiment shown, the axis 13 is to the left of the plane P and the axis 39 to the right of plane P "when the subframe and the chassis are seen from the front.

It is understood however that the axis 13 could be to the right of the plane P and the axis 39 to left of plane P "when the false chassis 23 and the chassis 1 are seen from the front.

In any event, the control cylinder 40 is inclined relative to the plans P and P ".

In the embodiment shown, when the planes P and P "are combined, that is to say when the planes R and R 'are parallel as it is shown for example in Figure 8, the cylinder 40 is inclined at an angle β of the order 55 degrees from planes P and P ', or about 35 degrees from to the R and R 'planes.

We now refer to Figures 9 and 10.

A conventional front axle is associated with the chassis via the false chassis 23.

The front axle, i.e. the axle which connects the two driving front wheels and which supports steering pivots is therefore not directly attached to the chassis by the front suspension elements.

The articulation part 24 of the stabilizers, arranged, where appropriate, on the front of each beam 31, 32 of the subframe 23 comprises two flanges 41, 42 facing each other, these flanges defining, in a manner known per se, a hinge pin 43 for the base of a jack body and a hinge pin 44 for a stabilizer arm.

The stabilizers 45 shown in FIGS. 11 to 14 are known in themselves and will therefore only be described briefly.

• une plaque rigide 46 apte à être plaquée au sol, montée en rotation à l'extrémité 47 d'un piston 48 d'un ensemble piston-cylindre 49 tel qu'un vérin à double effet, hydraulique ou pneumatique ;
• une pièce rigide ou bras 50 de section en U dont l'ouverture est en regard de l'ensemble piston-cylindre 49, le bras 50 étant mobile en rotation autour de l'axe 51 par rapport à la plaque 46.

Each stabilizer 45 includes:

• a rigid plate 46 capable of being pressed against the ground, mounted in rotation at the end 47 of a piston 48 of a piston-cylinder assembly 49 such as a double-acting cylinder, hydraulic or pneumatic;
• a rigid part or arm 50 of U-shaped section, the opening of which faces the piston-cylinder assembly 49, the arm 50 being movable in rotation about the axis 51 relative to the plate 46.

As will be understood by a person skilled in the art, the actuation of the actuator command 40, in retraction or extension, causes the movement of the chassis relative to the subframe, the subframe being in the position fixed by the stabilizers and / or the front wheels.

In Figure 18 is shown an extreme position of the chassis relative to the false chassis, assumed to be horizontal.

This extreme position is determined in particular by the capacities of the actuator command 40.

Reference is now made to FIGS. 19 et seq. Which represent a trolley with telescopic arm provided with a device according to the invention.

In this carriage, the drive means are arranged laterally by relation to the chassis and the cockpit is placed laterally and opposite training means.

In one embodiment, the front axle is rigid or oscillating relative to the chassis and the rear axle is oscillating with respect to the chassis.

The four wheels 52 are driving and of equal dimensions in the embodiment considered.

Steering, transmission, braking can be hydrostatic.

The machine comprises a lifting arm 53 movable in rotation about the axis 5.

A tool holder 54 is disposed at the free end of the arm 53 opposite the axis 5.

This tool holder is of universal type and is able to support various tools such earthmoving and recovery skips, palletizer with or without translator, skip loader, crane jib, backfill blade, concrete skips, sweeper, carrycot, fork, hydrogriffe, log grapple, worm gear distributor, and in general, any lifting, handling tool in the fields agriculture, building, public works, moving by example.

The stabilizers described above, optional, can be provided at the front and back of the craft.

Stabilizers and control cylinder 40 can be used jointly when the machine works on uneven ground or inclined with respect to horizontally.

The device may include means making it possible to stop or prevent movements, effects of overload, evolution on transverse slopes, likely to put the machine in a situation of risk of longitudinal tilting or transverse of great amplitude.

These means, or part of these means, in particular visual alarms and / or sound can be connected to a permanent power supply, allowing them to remain on standby, whatever the state of the machine.

These means may include force or displacement sensors placed between the front axle and the subframe 23, between the rear axle and the chassis 1.

These means may include inclinometers, sensors for measuring the telescoping stroke.

All the information delivered by the sensors can be integrated into a computer allowing the driver to know at all times the state of stability of the machine.

The lateral arrangement of the drive means 55 makes it possible to avoid any discomfort lateral visibility for the operator, when the arm is in the low position.

In the embodiment shown, the drive means 55 are located to the right of cockpit 56. It goes without saying that the opposite situation is possible if necessary.

The device according to the invention can be adapted to a chassis structure Traditional.

The kinematics of the entire device means that the slope correction and the lateral offset are obtained jointly by a single command.

Claims (15)

1. A device controlling the relative movement of the carrying structure (1) of a travelling machine with respect to an axle of the said machine, the said control device comprising a rigid frame (23) fixed to the said axle, this rigid frame (23) being articulated on the carrying structure (1) of the machine, control means allowing the rotation of the mean horizontal plane of the carrying structure (1) of the machine with respect to the mean horizontal plane of the rigid frame (23) fixed to the said axle, the said axle not being directly attached to the carrying structure (1) of the machine, characterised in that the rigid frame (23) comprises:

   two links (17, 18) articulated on a first top extreme part, rotating about substantially parallel axes (8, 9), with respect to the carrying structure or chassis (1) of the machine;

   two substantially parallel girders (31, 32) with respect to which the links (17, 18) are rotatably articulated, about axes (29, 30) on the second bottom extreme parts of these links (17, 18);

   means of associating the said girders (31, 32) with the said axle, the axes (8, 9) of the chassis (1) and the axes (29, 30) of the rigid frame (23) fixed to the axle being parallel to each other in order to provide the function of the rotation of the mean horizontal plane of the carrying structure of the machine with respect to the mean horizontal plane of the rigid frame fixed to the said axle.
2. A device according to Claim 1, characterised in that each link (17, 18) is provided with a body (19) with two parallel axes of rotation (20, 21), each upper axis of rotation (20) corresponding to an axis (8, 9) and each lower axis of rotation (21) corresponding to an axis (29, 30).
3. A device according to one of Claims 1 and 2, characterised in that the separation between the upper axes (8, 9) of rotation of the links is greater than the separation between the lower axes of rotation (29, 30) of these links (17, 18), these links (17, 18) being inclined by an angle a open towards the top with respect to the mid-plane (P) of the carrying structure of the machine, when the two planes defined by the upper (8, 9) and lower (29, 30) axes are parallel.
4. A device according to one of Claims 1 to 3, characterised in that the angle α is between a few degrees and 30 degrees approximately.
5. A device according to any one of Claims 1 to 4, characterised in that the means of controlling the movement of the rigid frame with respect to the carrying structure of the machine comprise a single ram (40) articulated for rotation about an axis (13) substantially parallel to the upper axes (8, 9) of articulation of the links (17, 18), the single ram being articulated for rotation about a lower axis (39) substantially parallel to the lower axes (29, 30) of articulation of the links (17, 18).
6. A device according to Claim 5, characterised in that the ram (40) is inclined by an angle β lying between a few degrees and 60 degrees with respect to the mean plane of the carrying structure, when the two planes defined by the upper (8, 9) and lower (29, 30) axes of articulation of the links are parallel.
7. A device according to any one of Claims 1 to 6, characterised in that it is attached by connection to a conventional carrying structure or chassis.
8. A device according to any one of Claims 1 to 7, characterised in that it is disposed on the front end part of the carrying structure of a travelling machine.
9. A travelling machine, characterised in that it comprises at least one device as defined in any one of Claims 1 to 8.
10. A travelling machine according to Claim 9, characterised in that it comprises a front axle and a rear axle with driving and steered wheels.
11. A travelling machine according to Claim 9 or 10, characterised in that it comprises a lifting arm able to move in rotation about a substantially horizontal axis (5).
12. A travelling machine according to Claim 11, characterised in that it comprises laterally disposed drive means, the control station being placed opposite to the drive means.
13. A travelling machine according to any one of Claims 9 to 12, characterised in that it comprises at least two stabilisers (45) fixed to the rigid frame.
14. A travelling machine according to any one of Claims 9 to 13, characterised in that it comprises a carrying structure in the form of a box girder, at the front end part of which there is placed the device controlling the movement of the frame forming a false chassis with respect to the box girder.
15. A travelling machine according to Claim 14, characterised in that it comprises a telescopic lifting arm, the device controlling the movement of the frame forming a false chassis with respect to the carrying structure affording in combination camber correction and lateral offset of the load by means of a single mechanism.

Images