EP0113266B1 - Combinative motor vehicle, in particular a light motor lorry equipped with an excavator for rapid usage - Google Patents

Abstract

1. A light lorry equipped with an excavator for rapid deployment, of a type comprising a chassis (3) carrying a free horizontal rear platform (9), an excavator (2) mounted on a turret (10) which can be rotated by 360 degrees relative to the chassis (3) and comprising a boom (11, 12, 13) carrying and operating a bucket (14), said excavator (2) being movable between a working position in which it is extended towards the rear of the lorry (1) and overhangs the latter, and a rest position in which it is folded up towards the front of the lorry, characterised in that the boom is formed by at least three arms (11, 12, 13) articulated on one another, in that the turret is drop mounted in an intermediate chassis (28) fixed to the main chassis (3) of the lorry and in that, of two of the three articulated arms (13, 11) of short reach and situated at the ends of the boom (2), one is connected to the bucket (14) and the other to the turret (10), whereas the intermediate arm (12) is of greater length corresponding approximately to the length of the platform (9) of the lorry (1), the arms (11, 12, 13) and the bucket (14) being able to pivot with respect to one another under the action of four double-action jacks (15, 17, 18, 19), which arms, when the boom is in the folded-up position, take up reciprocal positions defining an isosceles triangle with its point towards the bottom and whose base, formed by the intermediate arm (12), is slightly inclined with respect to the horizontal at a level corresponding to the height of the roof of the cabin (5) of the lorry (1).

Description

The invention relates to a light rapid intervention truck with excavator excavator of the type comprising a chassis carrying an unobstructed horizontal rear platform, an excavator excavator mounted on a turret with total rotation through 360 ° relative to the chassis and consisting of a boom carrying and maneuvering a bucket, said excavator being able to be moved between a working position where it is deployed towards the rear of the truck overhanging relative to the latter and a rest position where it is folded towards the front on the truck.

Such a truck is described in French patent 1,563,088 which relates to a truck carrying a bucket drilling machine which is mounted on a turret rotating on the platform of the truck. The boom of this bucket shovel consists of two arms, one of which is significantly longer than the platform, so that in the folded state, the shovel is arranged above the cabin, which significantly strike the overall height of the assembly. It is necessary to provide an arm of considerable length in order to be able to obtain a significant intervention or efficiency area for the bucket around the truck.

This results in a large size, in particular in height, which in particular prohibits the possibility of transporting such an assembly in an aircraft.

The subject of the present invention is such a light rapid intervention truck, the dimensions of which are reduced to the maximum, so that it can be air-transportable while having a maximum working radius or range, when the excavator is deployed. .

This is obtained, in accordance with the present invention, by the fact that the boom is formed by at least three arms articulated one on the other, the turret is mounted lowered in an intermediate chassis fixed to the main chassis of the truck and two of the three articulated arms of short range, located at the ends of the boom are connected one to the shovel bucket and the other to the turret, while the intermediate arm is of a greater length corresponding approximately to the length of the platform shape of the truck, the arms and the bucket being able to pivot with respect to each other under the action of four double-acting cylinders, said arms taking, when the boom is in the folded state, reciprocal positions delimiting a triangle isosceles oriented downward and whose side of the base formed by the intermediate arm is slightly inclined relative to the horizontal at a level corresponding to the height of the ceiling of the truck cabin.

According to a preferred embodiment, the different arms consist of two parallel flat bars in the shape of an isosceles triangle of low height, connected transversely, in particular by welding, by tubular spacer members, which also serve as fixing members to the jacks.

• la figure 1 est une vue en perspective du véhicule selon l'invention,
• la figure 2 est une vue schématique en élévation latérale du véhicule de la fig. 1,
• la figure 3, formée des figs. 3A et 3B montre deux feux de derrière du véhicule, dont l'une, 3A, représente essentiellement la position de travail dans laquelle des stabilisateurs latéraux sont déployés et prennent appui au sol, et dont l'autre, 3B, représente le cas de la position de repos dans laquelle les stabilisateurs latéraux sont relevés et le véhicule est installé dans un avion, en vue de son transport aérien, et
• la figure 4 est une vue schématique de l'arrière du véhicule et de la pelle en action, montrant la zone de travail de cette dernière.

Other characteristics and advantages of the invention will emerge from the description given below of an exemplary embodiment, taken with reference to the appended drawings, in which:

• FIG. 1 is a perspective view of the vehicle according to the invention,
• Figure 2 is a schematic side elevational view of the vehicle of FIG. 1,
• Figure 3, formed of Figs. 3A and 3B shows two rear lights of the vehicle, one of which, 3A, essentially represents the working position in which lateral stabilizers are deployed and rest on the ground, and the other of which, 3B, represents the case of the rest position in which the lateral stabilizers are raised and the vehicle is installed in an airplane, for its air transport, and
• Figure 4 is a schematic view of the rear of the vehicle and the shovel in action, showing the working area of the latter.

FIG. 1 shows a schematic perspective view of the vehicle consisting of a light truck 1 and an excavator, or backhoe 2.

The truck 1 comprises a chassis 3 mounted on four wheels 4 and carrying a cabin 5, a motor 6 disposed at the front, a hydraulic tank 7, a spare wheel 8 and a rear platform 9.

The shovel 2, shown in the deployed working state in this figure, essentially consists of a turret 10 which can rotate at an angle of 360 °, on an invisible support mounted in the chassis 3 of the vehicle, with an arrow formed of three arms 11, 12, 13, articulated between them, and of a bucket 14. The arm 11 can be raised or folded down by jacks 15 fixed to lateral uprights 16 of the turret, while jacks 17, 18 , 19 are used to maneuver the corresponding arms 12, 13 and the shovel 14.

In addition, a work station 20 is arranged laterally on the platform 9 of the vehicle next to the turret 10 of the excavator 2, and groups together all of the controls for the various jacks and of a hydraulic motor - not visible in this figure. - controlling the rotation of the turret.

Furthermore, in FIG. 1, it can be seen that the vehicle is equipped with four lateral stabilizers 21 each formed by a stand 22 articulated on the chassis 3 and whose base is provided with a support pad 23 also articulated on the stand.

Figure 2 shows a schematic side elevational view of the entire vehicle 1 and the shovel 2 in the folded or retracted state (rest position) on the platform 9 of the vehicle.

As indicated below in more detail, the boom with three arms 11, 12, 13, of the shovel 2 can be retracted above the platform to occupy a space corresponding approximately to the overall height of the vehicle and the overall length of the latter's platform.

In more detail, the boom 2 consists of three arms, 11, 12, 13, articulated together in axes 122, 123 and of which two 13 and 11, of short range, located at the ends of the boom are connected, l 'one 13 to the bucket 14 of the shovel, and the other 11, to the uprights 16 of the turret 10, while the intermediate arm 12 is of a greater length corresponding approximately to the length of the platform 9 of the vehicle .

The arms 11, 12, 13 and the bucket 14 can pivot with respect to each other under the action of the four double-acting cylinders already mentioned, 15, 17, 18, 19, and take - when the arrow 2 is at the folded state and brought back by rotation in the median plane of the vehicle and above the platform - reciprocal positions delimiting approximately an isosceles triangle, oriented point downwards and whose side of the base (arm 12) is slightly inclined with respect to the horizontal at a level corresponding to the height of the ceiling of the cabin 5 of the vehicle 1.

As is also visible in Figs. 1 and 2, the different arms 11, 12, 13, are constituted, like for example the arm 12, by two parallel flat bars in the shape of an isosceles triangle of low height, connected transversely, in particular by welding, by tubular members forming spacers 24, one of which also serves as a member for fixing to the working cylinder 18 of the bucket operating arm 13, and the other of which serves as a member for fixing the cylinder 17 for actuating the intermediate arm.

As seen in fig. 2, the turret 10 is fixed to a lower ring 25 of the type with alternating rollers, in engagement with a pinion 26 integral with the axis of a hydraulic drive motor 27 housed in the lowered position in the chassis 3 of the vehicle and at inside an intermediate frame 28 supporting the crown 25 and the turret 10, and fixed by bolting in the frame 3.

As can be seen in the side elevation view of FIG. 2, the work station 20 is partially hidden by the turret 10.

In addition, there is shown very schematically a pump 29 connected to the hydraulic tank 7, said pump also being connected to a power take-off, not shown, on the engine of the vehicle.

Furthermore, the hydraulic motor 27 and the various jacks 15, 17, 18, 19 are connected to a conventional hydraulic system, not shown, including the pump 29 and the tank 7 as well as a distributor supplying the hydraulic motor 26 and the cylinders.

As can be seen in Figs. 2 and 3, the vehicle is provided with lateral stabilizers 21 formed of crutches 22 of triangular shape, equipped with articulated rectangular pads 23 and which are pivotally mounted on a transverse upright 30 of the vehicle chassis. Each stabilizer is rotatably mounted on an axis 31 such that in the raised or at rest state (FIGS. 2 and 3B), said crutches 22 are arranged vertically inside the space corresponding to the overall limits of the vehicle. 1.

These crutches 22 are actuated by jacks 32, the body of which is integral with the upright 30 and the rod of which is articulated at a point 33 offset relative to the pivot axis of said crutches.

It will be noted that the stabilizers have the effect of increasing the earth-moving performance, which could otherwise be reduced by the light weight of the vehicle and the stands 22 can also be deliberately blocked in the semi-open or retracted position, if the configuration of the land requires it.

In FIGS. 2 and 3B, it can be seen that, once the stand 22 is raised, the shoe 23 assumes a vertical position flat against the web of the stand.

FIG. 3B shows this state in which the vehicle 1 provided with the shovel 2 is transported in an airplane, identified by its inner shell 34.

Naturally, the jacks 31 are conventionally connected to the entire hydraulic system of the vehicle.

The arrangement of the work station 20 next to the turret 10 on the platform 9 of the vehicle brings together all the controls and allows excellent visibility of the site.

In FIG. 4, the rear evolution zone of the shovel 2 is reproduced at the rear of the vehicle 1, stabilized on a ground 35, which is capable of digging excavations having the outline 36 in section.

Naturally, the shovel 2 can have a total rotation (360 °), it can carry out work all around the vehicle and therefore have a very large working radius, which reduces the downtime usually due to the movement of the vehicle when digging large cavities.

The operation of the assembly is as follows: once arrived at the site, the driver of the vehicle 1 places the lateral stabilizers 21 in the required position, then maneuvers the shovel 2 in a conventional manner using the jacks 15, 17, 18 , 19.

Once the excavation is complete, it retracts (or folds) the boom formed by the arms and the bucket in the position corresponding to fig. 2, (the arms being articulated together at 122 and 123 (see FIG. 2) so that, folded, they occupy a space in the shape of an inverted triangle), but still in a cantilevered position at the rear or on the side of the vehicle, then it rotates the turret by the desired angle to bring the assembly of boom 2 in the vertical median plane below the platform.

Claims (6)

1. A light lorry equipped with an excavator for rapid deployment, of a type comprising a chassis (3) carrying a free horizontal rear platform (9), an excavator (2) mounted on a turret (10) which can be rotated by 360° relative to the chassis (3) and comprising a boom (11, 12, 13) carrying and operating a bucket (14), said excavator (2) being movable between a working position in which it is extended towards the rear of the lorry (1) and overhangs the latter, and a rest position in which it is folded up towards the front of the lorry, characterised in that the boom is formed by at least three arms (11, 12, 13) articulated on one another, in that the turret is drop mounted in an intermediate chassis (28) fixed to the main chassis (3) of the lorry and in that, of two of the three articulated arms (13, 11) of short reach and situated at the ends of the boom (2), one is connected to the bucket (14) and the other to the turret (10), whereas the intermediate arm (12) is of greater length corresponding approximately to the length of the platform (9) of the lorry (1), the arms (11, 12, 13) and the bucket (14) being able to pivot with respect to one another under the action of four double-action jacks (15, 17, 18, 19), which arms, when the boom is in the folded-up position, take up reciprocal positions defining an isosceles triangle with its point towards the bottom and whose base, formed by the intermediate arm (12), is slightly inclined with respect to the horizontal at a level corresponding to the height of the roof of the cabin (5) of the lorry (1).

2. A vehicle as claimed in claim 1, characterised in that the various arms (11, 12, 13) comprise two flat parallel beams in the form of an isosceles triangle of low height, which beams are transversely connected, in particular by welding, by tubular bracing elements (24) which also serve as elements for securing to the jacks.

3. A vehicle as claimed in either of claims 1 and 2, characterised in that the intermediate chassis (28) is bolted into the chassis (3) of the vehicle (1) and that the turret carries a lower ring (25) of the type having alternating runners which ring is meshed with a pinion (26) which is integral with the axle of a hydraulic drive motor (27) accommodated in a drop mounted manner inside the intermediate shaft (28) and the chassis (3) of the vehicle.

4. A vehicle as claimed in any of claims 1 to 3, characterised in that it comprises a work station (20) disposed on the platform (9) of the vehicle (1) laterally at the side of the turret (10) of the excavator (2) and combines all the manual operations of the various jacks (15, 17, 18, 19) and of the hydraulic motor (27).

5. A vehicle as claimed in any of claims 1 to 4, characterised in that it comprises lateral stabilizers (21) in the form of legs (22) having articulated feet (23) which are pivotally mounted on transverse arms (30) of the chassis (3) of the vehicle (1) at a point (31) such as in the raised or rest position, said legs (22) are disposed vertically inside the space corresponding to the overall limits of the vehicle (1), and that they are operated by hydraulic jacks (32) whose bodies are integral with the arm (30) of the chassis and whose rods are articulated at a point (33) which is offset with respect to the pivot axis (31) of the legs on said arms (30).

6. A vehicle as claimed in any of claims 1 to 5, taken as a whole, characterised in that the hydraulic motor (27) and the various jacks (15, 17, 18, 19, 32) are connected to a hydraulic system comprising a hydraulic reservoir (7), a pump (29) driven by a power take-off point on the engine (6) of the vehicle (1) and a distributor feeding the hydraulic motor and said jacks.

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