FR2759998A1 - Tool carrier vehicle for excavation or earthmoving operations or loading-unloading operations - Google Patents

Abstract

The vehicle comprises a wheeled chassis (1), independent of a driving cab (3), a lifting mast (2) and its equipment and an engine driving set (4) for the displacement, lifting and work operations. The lifting mast is articulated at the top (231) to the driving cab. The driving cab and the driving set form an assembly which can translate relative to the chassis in a controlled manner. The lifting mast is articulated in its bottom part (21) to the chassis. The driving cab and the driving set assembly are displaced relative to the chassis in a controlled manner to incline or erect the mast. The mast comprises a fixed tube (23) and a movable tube (24). Sliding of the movable tube relative to the fixed tube is controlled by an actuator (25). The fixed tube is articulated at its base (21) to the chassis and the movable tube carries at its upper end (241) a rotating roller (242). A traction chain (56) passing over the roller has one end (562) connected to a fixed point (231) in the fixed tube and the other end (561) connected to the lifting mast movable equipment.

Description

 The present invention relates to a tool carrier for transporting, handling and carrying out work with tools, comprising a rolling chassis, a driving position, a lifting mast and its equipment, and a drive unit. powered for travel, lifting operations and works.

 We know, on the one hand, machines used to carry out excavation or earthmoving work such as for example small machines with arms receiving an excavating shovel or provided with a riprap blade or a jackhammer fixed to the end of the arm.

 There are also different types of lift mast and fork carriers for lifting and transporting loads.

 Thus, it is known according to document US-A2 421 472, a tool holder, comprising a lifting mast with its equipment. This mast is articulated by a pivot in the lower part; a jack is connected in intermediate position to the mast and is supported on the body of the machine to tilt the mast depending on the operations to be carried out. However, this relatively heavy construction vehicle, is not concerned with the balance and center of gravity of the vehicle with its load, due to the relatively large mass of the vehicle relative to the load to be lifted.

 There is also a device of this type according to document US-A-5 370 494. This device is of lighter construction. It is a folding machine against the mast. It hangs on the back of a truck, the mast in vertical position and the body of the machine is raised to also be put in vertical position.

 However, in none of the known vehicles is the problem of shifting the center of gravity of the vehicle / load assembly mentioned, in order to increase the stability of the equipment and / or conversely allow a load to be lifted to a relatively large height. completely safe.

 The present invention aims to create a versatile machine capable of transporting or lifting loads or performing work with tools such as buckets, riprap blade, drilling tool, having excellent stability for lifting loads or during the execution of work with the tools carried by the lifting mast.

To this end, the invention relates to a tool carrier characterized in that - the running chassis is independent of the driving position
and the drive unit, - the lifting mast is
- articulated in the upper part of the driving position, - the driving position and the drive unit form a
assembly movable in translation relative to the wheel chassis
in a controlled manner.

 According to an advantageous characteristic, the lifting mast is articulated in the lower part to the rolling chassis, and the movable assembly in translation formed by the driving position and the drive group is moved in a controlled manner to tilt or straighten the mast by displacement of this assembly with respect to the rolling chassis.

 According to another particularly advantageous characteristic, the lifting mast is articulated in the low position to the rolling chassis by means of an arm secured to the mast, of an intermediate piece connecting by articulation the arm to the chassis support and a connection (connecting rod or jack).

 This articulation between the mast and the chassis makes it possible to bring the mast even closer to the driving position, that is to say to move the center of gravity of the loaded mast more towards the interior of the chassis, further accentuating the advantageous effect. of the cockpit movement according to the invention. In the case of an actuator, it is advantageous to control its supply as a function of the actuation of the actuator provided between the upper part of the mast and the upper part of the operator's station in order, as the case may be, to keep the mast parallel to itself. even during its movement of displacement (for example in vertical position) or on the contrary to tilt it to carry out certain maneuvers.

 The tilting mounting of the lifting arm allows, to lift and transport large loads (relative to the capacity of the machine) on uneven or unstable terrain, to move the mobile assembly back to move the center of gravity of the gear backwards and tilt the mast also backwards; the load carried is thus better distributed with respect to the rolling chassis, preventing the chassis from being stressed too much at the front and sinking or unbalancing.

 This makes it possible to transport relatively heavy loads on uneven or soft ground, such as weakly stabilized soils, for example on construction sites or public works. This also makes it possible to raise to a relatively large height, substantially equal to twice the length of the mast, without the risk of tilting, thanks to the good distribution of the masses on the support polygon formed by the rolling chassis.

 The rearward movement of the mobile assembly can be done according to the load to be lifted or transported to ensure the best possible distribution. This rearward movement also makes it possible to simply tilt the forks fitted, where appropriate, the lifting mast to properly hold the load pressed on the forks and against the deck.

According to another advantageous characteristic of the invention, the lifting mast comprises a fixed tube and a movable tube sliding relative to the fixed tube by being controlled by a jack, - the fixed tube being articulated by its base to the chassis of rolls
ment, - the movable tube carrying at its upper end a roller
rotation, - a traction chain passing over the rotation roller, of which
one end is connected to a fixed point on the fixed tube and
the other end is connected to the mobile equipment of the mast
lifting.

 The mast thus constituted by a single assembly, placed in the median plane of the machine, constitutes a lifting means which is strong enough to lift the loads which such a machine can carry. This rigid mast is of simple construction making it possible to easily lift the loads to a height substantially double its length in the retracted position.

 The lifting is done in a simple way thanks to the multiplication of the movement ensured by the traction chain, working in the manner of a cable or a chain of hoist.

This multiplication also allows precise positioning of the mobile equipment of the mast, which can be particularly important when this mobile equipment carries a tool.

 The single mast of the machine offers good visibility at the front allowing to follow and control the load or the work carried out with the tool.

According to another advantageous characteristic of the invention, the mobile equipment of the lifting arm comprises - an apron receiving the tools,
- bearing against the front face and the rear face of the mast,
* having rollers rolling on the front face
and the rear face of the mast, - a brake pinching the rear and front faces of the mast for frei
block or block the movement of mobile equipment.

 The mobile equipment is thus guided precisely on the mast. The lowering movement of the mobile equipment can be slowed down by the brake. The mobile equipment can also be blocked by the brake in addition to the blocking achieved by the hydraulic circuit.

 This brake constitutes a safety element in the event of mechanical or hydraulic failure.

 According to another advantageous characteristic of the invention, the fixed tube of the mast is surrounded by the mobile tube, the jack being housed in the fixed tube.

 The fixed tube serving as a guide means and the jack are particularly protected by this structure.

 According to another advantageous characteristic of the invention, the drive unit consists of a heat engine driving at least one pump and its hydraulic circuit for controlling the movements of the rolling chassis, the movement of the mobile equipment of the mast. lifting, the movement of the mobile assembly in translation relative to the rolling chassis and the driving of the tools carried by the mobile equipment.

 The driving of the various organs of the machine by hydraulic circuits facilitates the transmission of movements, in particular for the rolling chassis, the driving wheels of which are driven by hydraulic motors.

 According to another advantageous characteristic of the invention, the rolling chassis is a chassis with tracks, the driving wheels of which are driven by a hydraulic motor supplied with fluid by the hydraulic circuit of the drive group.

 The tracked chassis provides particularly high stability on soft ground because the pressure exerted by the machine is extremely low and this all the more so as the load is well distributed thanks to the possible movements for the mobile assembly and the mast. lifting.

 According to another advantageous characteristic of the invention, the lower end of the mast is articulated to the running chassis between the tracks.

 According to another advantageous characteristic of the invention, the mobile assembly formed by the driving position and the drive unit is carried by a plate provided with two rails rolling on translation rollers carried by the rolling chassis, a jack moving the mobile assembly relative to the chassis or blocking the mobile assembly relative to the chassis.

 According to another advantageous characteristic of the invention, the upper part of the mast is the upper end of the fixed tube and this upper part is hingedly connected to a jack, itself hingedly connected to the driving position. This jack generally functions as a connecting rod when the mobile assembly moves back. But to tilt the mast forward the driver controls this cylinder, which allows in some cases of use to leave the mobile assembly in the rear position and tilt the mast.

 According to another advantageous characteristic of the invention, the movable tube of the mast is the outer tube, split with a longitudinal opening located on the rear side for the passage of the fastener carrying the upper articulation of the mast.

According to a particularly advantageous characteristic - the mast is formed by a telescopic assembly actuated by a
cylinder, the upper part of which is articulated at the con
pick and an intermediate part is connected by a connecting rod
to the running chassis, - the other end of the mast carrying a tool.

 It is particularly advantageous that the connecting rod is a jack and that the telescopic assembly comprises a telescopic support with at least two parts sliding one inside the other, the telescopic parts being controlled by the jack.

 The machine provided with such a telescopic mast, whether it is placed in the median or substantially median plane of the machine, next to the cabin or the driving position or on one side or on both sides, allows to receive an ideal blade or front bucket. The movement made by the single or double mast makes it possible to push, for example, a load such as earth for earthworks, to raise the bucket to a relatively large height and, above all, to advance the bucket to discharge it in a bucket.

 During these different movements, the displacement of the load constituted by the driving position and the drive unit, makes it possible to quickly and easily balance the load thus lifted.

 According to another advantageous characteristic, the mast is articulated in the low position to the assembly movable in translation.

 Such a mast is particularly suitable for receiving certain equipment. In addition, the cockpit is in fact limited to the engine and to the various controls which can even be connected to a remote control to drive the machine from a distance.

 The absence of a cabin on the machine makes it possible to reduce its bulk and to produce a machine of small dimensions which is particularly practical since it is capable of passing through narrow passages or places of difficult access.

 Such a machine is particularly suitable for agricultural work or handling work with or without accessory equipment, such as platform, bucket, concrete mixer, etc.

The present invention will be described below in more detail with the aid of the accompanying drawings in which
FIG. 1 is a front view of the tool carrier according to the invention,
FIG. 2 is a side view corresponding to FIG. 1, the lifting mast being in the neutral position,
FIG. 3 is a side view of the lifting machine with the mast in the inclined position,
FIG. 4 is a partial section view of the lifting mast at the deck,
FIG. 5 is a cross section of the lifting mast and the deck showing the rollers,
FIG. 6 is another cross section of the lifting mast showing the brakes,
FIG. 7 is a side view of a first alternative embodiment of the machine according to the invention,
FIGS. 8 and 9 show another alternative embodiment of an accompanying conductive machine, in two positions of use,
FIGS. 10 to 17 show the third variant of the invention, equipped with different tools or installations and this in varying operating positions,
FIG. 18 shows an alternative embodiment of the machine of FIG. 1, in a similar position,
- Figure 19 shows an alternative embodiment of the machine of Figure 18, the mast and the cabin having moved back.

 According to Figures 1, 2, 3, the invention relates to a tool holder for receiving tools such as a plate or a fork for transporting and handling loads or tools such as an earthmoving bucket, a concrete mixer which loads in the low position and can be lifted by the mast to arrive, for example, at the first or second level of a scaffolding or construction; the mast can also receive tools such as a milling cutter to make the trenches used to bury cables or pipes, cutting or cutting tools, etc. and in general, many tools used in construction. These tools adapt quickly and easily to mobile equipment so that the machine is of universal practical use on a construction site.

 The machine comprises a rolling chassis 1, a lifting mast 2 and a driving position 3 as well as a driving group 4, the driving position 3 and the driving group 4 forming a unit movable in translation in the longitudinal direction, with respect to the rolling chassis 1.

 The rolling frame 1 according to this example is constituted by a tracked frame 11 passing over wheels 12, 13 one of which is driving. Secondary wheels 14 support the tracks.

 Figure 2 shows in its half-section of the rolling frame 1, the structure of these different bodies.

 The wheel 13 is for example driving. It is driven by a hydraulic motor 15 connected to a hydraulic circuit not shown.

 The rolling frame 1 is carried by a structure 16, for example in mechanically welded construction.

 The movable assembly formed by the elements 3, 4 is carried by a plate 31 equipped, on its underside, with two rails 32 in the form of C, serving as guide rails. These rails run on rollers 17 carried by the frame 16 of the chassis 1 (Figure 1).

 The plate 31 is equipped with a lug 33 to which the head 34 of the rod 35 of a jack 36 is articulated, the cylinder of which is articulated by the attachment 37 to a lug 18 of the frame 16.

 The jack is controlled from the control station 3 to deploy and retract and thus make the mobile assembly 3, 4 slide relative to the rolling chassis 1.

 The driving position 3 includes various levers and control means 38 which are not detailed, as well as a clip 39 in the upper part.

 The drive unit 4 not shown in detail consists of a heat engine driving one or more hydraulic pumps each associated with a hydraulic circuit. These hydraulic circuits controlled by distributors such as for example the drawer 41 (FIG. 2) are used to control the various hydraulic fluid circuits such as the hydraulic circuit supplying the drive motors 15 for the tracks 11 (a motor is associated with each of the two tracks to control the steering movements), the hydraulic circuit of the lifting mast and the hydraulic circuit of any tool carried by the lifting mast.

 The lifting mast 2 carries mobile equipment 5 which slides relative to the mast. This mobile equipment 5 is constituted in its simplest expression, by a frame or deck provided with fixing means such as for example a lower cross member 51 and an upper cross member 52 connected by lateral branches 53 and to which the tools mentioned above are attached. above.

 The mobile equipment 5 is provided with lower and upper rollers 54 and 55 rolling on the front face and the rear face of the mast 2. The mobile equipment 5 is suspended from a traction means such as a chain 56.

 The structure of the mast will appear in more detail in Figures 4, 5 and 6.

 The mast 2 is articulated at its lower part by means of an arm 21 to a lug 19 carried by the frame 16 of the rolling chassis 1.

 The upper part 22 of the mast is connected, in an articulated manner by a jack 7 forming a connecting rod 7, to the mobile assembly 3, 4, in this case the tab 39 carried by the cabin of the driving position. This jack generally functions as a connecting rod when the mobile assembly moves back. But to tilt the mast forward the driver controls this cylinder, which allows in some cases of use to leave the mobile assembly in the rear position and tilt the mast.

 The lower arm 21 (generally split) is articulated to the lug 19 in the gap between the wheels or tracks of the rolling chassis 1, so that the mast 2 is offset as far as possible towards the rear of the or towards the inside of the support frame's support polygon 1.

 The lifting mast 2 consists of a fixed inner tube 23 and an outer tube 24 telescopically sliding on the inner tube 23. The fixed expression associated here with the tube 23 means that this tube does not translate; that does not exclude its pivoting. The sliding is controlled by a jack 25 having substantially the length (in the retracted position) of the fixed tube 23 of the mast. The base of the jack 25 is connected to the fixed tube 23 and the head 251 of the jack rod is preferably connected in an articulated manner to the upper end of the part 241 of the movable tube 24. This movable tube 24 carries in the upper part a roller 242 on which the chain 56 passes.

This chain 56 is connected by its end 561 to the mobile equipment 5 and by its other end 562 to the lug 231 at the upper end of the fixed tube 23 of the mast. This tab 231 articulatedly carries one end of the jack 7, the other of which is connected to the tab 39.

 FIG. 3 shows the mobile assembly 3, 4 in the retracted position with respect to the rolling chassis 1 and the tilting of the mast 2 rearwards around the arm pivot 21 on the lug 19 of the frame 16 of the chassis 1. Although the solution of the connection of the mast 2 and of the mobile assembly 3, 4 by the connecting rod 7 is the most practical since the cabin of the driving position 3 is necessary for safety reasons and this cabin is reinforced by very solid hoops resistant to crushing, the connection could also be made at another location of the mobile assembly 3, 4.

 Figures 4, 5, 6 show the detailed structure of the mast, revealing the elements 51, 52, 53 of the deck of the mobile equipment 5. In the lower part the deck carries the rollers 54 rolling on the front of the mast. In the upper part, the equipment carries the rollers 55 which roll on the rear side of the mast.

 The mast 2 appears itself with its fixed inner tube 23, housing the jack 25 and the outer tube 24 engaged telescopically on the inner tube 23.

 The outer tube 24 is open on its rear side (facing the driving position 3) by a slot delimited between its edges 243, 244) for the passage of the outer tube 24 over the tab 231 of the inner tube (FIGS. 2, 5, 6).

 The mobile equipment 5 is provided on its rear side with supports 57 carrying the rollers 55 (FIG. 5) as well as part of the brakes (FIGS. 4 and 6).

 The brakes 9 consist of rear, fixed pads or pads 91 and front brake pads or pads 92. These pads 92 are actuated by brake pistons 93 controlled by a hydraulic circuit 94.

 The plates 91 are supported on the rear edges 243, 244 of the outer tube 24 and the plates 92 on the front face of this same tube 24.

According to a first variant of the invention, the machine consists of a rolling chassis 100, for example with tracks, a drive unit 101 and a driving position 102. This machine is equipped with one or two inclined lifting masts, formed of a telescopic support in two parts 103, 104 sliding telescopically relative to one another. The part 103 is connected by an articulation 105 to the driving position 102 and the free end 106 of the other part 104 is provided with equipment such as a blade or a bucket 107. The telescopic movement of the two parts 103, 104 is controlled by a jack 108. This movement is shown diagrammatically by the double arrow
D1.

 Equipment such as the bucket or blade 107 at the lower end of the mast can also be tilted by a jack 109, the cylinder of which is articulated to the lug 110 carried by the element 104, the head of the rod piston 111 being connected to tool 107.

 The mast thus formed is connected in the upper part to the articulation 105 of the driving position 102 and, in an intermediate part of the element 103, by a connecting rod 112 in the form of an extendable jack in the direction of the double arrow F1. This jack 112 is articulated by the articulation 113 to the telescopic assembly and by the articulation 114, to the rolling chassis 100.

 In this set, the movements have been identified by arrows or double arrows.

 Thus, the assembly movable in translation formed by the drive group 101 and the driving position 102 can move in the direction of the double arrow A1 relative to the rolling chassis 100.

 The articulation 105 of the upper end of the mast on the driving position 102, moves in the direction of the double arrow B1 (in the same way as displacement Al).

 The telescopic assembly 103, 104, 108 is movable in its reference, telescopically, in the direction of the double arrow D1; it turns around the joint 105 according to the double arrow H1.

 Finally, when the jack 112 which deploys or retracts in the direction of the double arrow F1, is blocked, its articulation 113 describes an arc of a circle El since the other end of the connecting rod 112 (jack) is a joint 114 carried by the bearing assembly 100.

 The combination of the different movements makes it possible to tilt or raise the mast 103, 104, 108. This even makes it possible to reverse the inclination of the mast to pass from the inclination shown in FIG. 7, more or less accentuated but likewise sense of a very different inclination, the mast 103, 104, 108, being raised in the opposite direction.

 The machine described above and shown in Figure 7 may have a single mast, for example in the middle of the machine, next to the cabin if it is narrow. The mast is then located substantially in the median plane of the machine.

 The machine may also include a lateral mast or two lateral masts connected to the same tool.

 The different movements described above can be combined in pairs, in threes or in fours the mobile assembly can move in translation so as to tilt the mast, the rod or jack 112 remaining fixed. The mast can be folded out or retracted to dig or load with the tool, the tool itself can be tilted independently thanks to its jack. Finally, the mast can be tilted around the joint 105.

 Figures 8 to 17 show another variant of the tool carrier and its various equipment.

 This variant of machine is composed, as before, (FIG. 8) of a rolling chassis 201 for example with tracks, carrying a movable assembly in translation (double arrow A2) composed of a drive group 202 and of a driving position 203; the latter is limited to joysticks and control buttons. The machine is equipped with a movable mast 204 with the assembly movable in translation. This mast is connected at its lower end by the articulation 205 to the movable assembly near its upper end, it is connected by an articulation 206 to a jack 207 itself connected by an articulation 208 to the mobile assembly. The actuator of the jack 207 makes it possible to tilt the mast 204 by pivoting about its axis 205.

 This mast is provided with a fork 209 connected by a chain 210. The operation of this fork is the same as that of the first embodiment.

 Figures 8 and 9 show the tool carrier in two positions of use. In FIG. 8, the mast 204 and, consequently, the mobile assembly, are in the right position whereas in FIG. 9, this mobile assembly has been moved to the left.

 The sliding and sliding control means such as the jack or jacks moving the movable assembly relative to the rolling chassis, are not detailed in FIGS. 8 and 9 nor in the following figures. For their description, reference will be made to the description of FIGS. 1 to 3.

 The tool holder according to FIGS. 8 and 9 allows a particularly reduced construction, without stability problem since, precisely, the mobile assembly can move relative to the bearing assembly and always position the center of gravity near the center of the support polygon formed by the two tracks.

 According to a variant not shown, the spacing of the tracks is adjustable. This spacing is done, as already indicated above, by the control of one or more cylinders.

 FIG. 10 shows the machine described above, equipped with a bucket 211 carried by two arms 212 themselves articulated to the support 213 mounted on the mast 204. Two jacks 214, 215 make it possible to raise the arms 212 and tilt the bucket 211.

 FIG. 11 shows another variant with a fork 220, also connected to a support 213 such as that of FIG. 10, by an arm 212 controlled by two jacks 214, 215.

 Figures 12, 13, 14 show the tool carrier equipped with a concrete mixer in three positions of use.

 The concrete mixer 230 is carried in the usual way by a pivot surrounded by a ring gear 231 for its rotation drive; this pivot is connected to two lateral arms 232 connected by the articulation 233 to the support 234 carried by the mast.

 The arms 232 are tilted by a jack 235. At the front, a chute 236 is provided for pouring the concrete.

 The concrete mixer 230 can be put in the low position (Figure 12) for loading. Then, we can raise it (figure 13) and finally tilt it to empty it.

 FIG. 15 shows another variant of equipment constituted by a tilting bucket 250 carried by the support 251 in an articulated manner around a joint 252. The tilting is done by a jack 253. This bucket is raised and tilted as it appears in the figure.

 FIG. 16 shows another variant constituted by a lifting arm 260 provided with a hook 261. This arm 260 is carried by a support 262 and the pivoting of the arm 260 around its articulation 263 on the support 262 is controlled by a jack 264.

 This set can be raised and lowered.

 FIG. 17 shows an equipment 270 constituted by a first fork 271 supplemented by an upper fork 272. This assembly is carried by a support 273 movable along the mast 204. The fork 271 is carried by an arm 274 similar to the arm 212 of the FIG. 10. This arm 274 is actuated by two jacks 275, 276 also similar to those of the embodiment of the equipment in FIG. 10. Finally, the upper fork 272 is controlled by a jack 276.

 The variant embodiment of the machine represented in FIGS. 18 and 19 differs from the basic embodiment which is the object of FIGS. 1 and 2 by a modification of the arm 21 replaced by an arm part 21A secured to the mast proper and to a part connecting link 22B articulated on the lug 19. The connecting piece 21B is itself connected to a fixed point and preferably to the articulation 34 of the cabin by a member 21C in the form of a connecting rod or jack. In the case of an actuator, this is preferably controlled as a function of the actuation of the actuator 7.

 The comparison of FIGS. 18 and 19 shows all the advantage of this variant embodiment which allows, when the driving position 3 moves back, to bring the lifting mast 2 even closer to the driving position, that is to say shift the center of gravity of the mast carrying its load more towards the inside of the chassis, i.e. the support polygon

Claims (15)

10) Tool carrier for transporting, handling and carrying out work with tools, comprising - a rolling chassis, - a driving position, - a lifting mast and its equipment, - a drive unit powered for travel,  lifting operations and works, characterized in that - the rolling chassis (1) is independent of the con  pick (3) and drive unit (4), - the lifting mast (2) is  - articulated in the upper part (231) at the driving position (3), - the driving position (3) and the drive unit (4) for  an assembly movable in translation relative to the chassis  bearing (1), in a controlled manner.  2 ") Machine according to claim 1, characterized in that the lifting mast (2) is articulated in the lower part (21) to the rolling frame (1), and the movable assembly in translation formed by the driving position ( 3) and the drive unit (4) is moved in a controlled manner to tilt or straighten the mast (2) by displacement of this assembly (3, 4) relative to the rolling chassis (1). 30) Machine according to claim 1, characterized in that the lifting mast (2) comprises a fixed tube (23) and a movable tube (24), sliding relative to the fixed tube (23) being controlled by a jack ( 25), - the fixed tube (23) being articulated by its base (21) to the chassis  bearing (1), - the movable tube (24) carrying at its upper end (241)  a rotation roller (242), - a traction chain (56) passing over the rotation roller  (242), one end of which (562) is connected to a fixed point  (231) of the fixed tube (23) and the other end (561) is connected  to the mobile equipment (5) of the lifting mast (2). 40) Machine according to claim 1, characterized in that the mobile equipment (5) of the lifting arm (2) comprises - an apron (51, 52, 53) receiving the tools,  - bearing against the front face and the rear face of the mast (2),  * having rollers (54, 55) rolling on the  front face and rear face of the mast (2), - a brake (9, 91, 92) pinching the rear and front faces of the  mast (2) to brake or block the movement of the equipment  mobile (5).  5) Machine according to claim 3, characterized in that the fixed tube (23) of the mast is surrounded by the movable tube (24), the jack (25) being housed in the fixed tube (23). 60) Machine according to claim 1, characterized in that the drive unit (4) consists of a heat engine driving at least one pump and its hydraulic circuit for controlling the movements of the rolling chassis, the movements of the mobile equipment of the lifting mast, the movement of the mobile assembly in translation relative to the rolling chassis and the driving of the tools carried by the mobile equipment. 70) Machine according to claim 1, characterized in that the rolling chassis (1) is a crawler chassis (11) whose driving wheels (13) are driven by a hydraulic motor (15) supplied with fluid by the hydraulic circuit of the drive unit (4). 80) Machine according to claim 2, characterized in that the lower end (21) of the mast (2) is articulated to the rolling chassis (1) between the tracks (11). 90) Machine according to claim 1, characterized in that the mobile assembly formed by the driving position (3) and the drive unit (4) is carried by a plate (31) provided with two rails (32) rolling on translation rollers (17) carried by the rolling chassis (1, 16), - a jack (36) controlling the movement of the mobile assembly  (3, 4) relative to the chassis (1) or blocking the whole mo  bile (3, 4) relative to the frame (1). 100) Machine according to claim 3, characterized in that the upper part of the mast is the upper end of the fixed tube (23) and this upper part is hingedly connected to a jack (7), itself connected so articulated (39) at the driving position (3). 110) Machine according to claim 3, characterized in that the movable tube of the mast (2) is the outer tube (24), split with a longitudinal opening located on the rear side for the passage of the fastener (231) carrying the 'upper articulation of the mast (2). 120) Machine according to claim 1, characterized in that - the mast is formed by a telescopic assembly (103, 104) ac  actuated by a jack (108), the upper part of which is articulated  (105) at the driving position (102) and an intermediate part  (113) is connected by a connecting rod (112) to the rolling chassis (100), - the other end (106) of the mast (103, 104) carries a tool  (107). 130) Machine according to claim 12, characterized in that the connecting rod (112) is a jack. 140) Machine according to claim 12, characterized in that the telescopic assembly (103, 104, 108) comprises a telescopic support (103, 104) with at least two parts sliding one inside the other, the telescopic parts being controlled by the jack (108). 150) Machine according to claim 12, characterized in that the mast is constituted by a telescopic assembly located in the median plane or near the median plane of the machine, between the tracks, or on one side of the machine or on both sides and it carries a tool chosen from the group formed by shovels and buckets. 160) Machine according to claim 1, characterized in that the mast is articulated (205) in the low position to the movable assembly in translation (202, 203). 170) Machine according to claim 16, characterized in that the front end of the mast receives equipment chosen from the group comprising - a bucket (211), - a bucket (211) controlled by a jack (214, 215), - a concrete mixer (230), - a concrete mixer (230) tilted by a jack  (235), - a bucket (250), - a lifting arm (260), - a fork (270), these tools being themselves provided with control means such as jacks.  18) Machine according to claim 2, characterized in that the lifting mast (2) is articulated in the low position (21A, 21B, 21C) to the rolling chassis (1, 19) by means of an arm (21A ) integral with the mast (2), an intermediate piece (21B) connecting the arm (21A) by articulation to the support (19) of the chassis (1) and a connecting member (21C) (connecting rod or jack).