WO1991002126A1 - Multi-purpose device fitted at the front of machines for building road backfill and the like and comprising a blade for pushing the materials - Google Patents

Abstract

The present invention relates to a multi-purpose device fitted on the front of a machine for building backfill for roads and the like, comprising a blade (11) for pushing the materials; said blade (11) consists of two parts, lower and upper (14) which are closed together continuously when in position for pushing said materials, where the upper part comprises rollers (12) and fitted on pivots (27) to allow it to be turned over (17) in such a way that said rollers (12) may rotate about spindles (28) in the opposite direction to the travel in contact with the wheels (18) of a lorry located in front of said machine (10) and under the effect of its push.

Description

 Multifunction device mounted at the front of the machine for the construction of road and other embankments and comprising a blade for pushing materials

The present invention relates to a multifunction device mounted at the front of the machine for the construction of road and other embankments and comprising a blade for pushing materials.

The technical sector of the invention is the field of public works and the construction of materials for this work.

One of the main applications of the invention is the production of road embankments, airports, earth dikes, foundations in stabilized soils.

For this, in the design of solid earth, sports grounds and all other civil engineering works, we generally proceed with the spreading of a layer of earth or other material called all comers which is a mixture of sand, earth, small pebbles. The mixed assembly is generally spread out with a machine called a bulldozer, which is a crawler or rubber-wheeled tractor equipped with a blade at the front to push the materials. Then a light machine on rubberized wheels with a leveling blade placed in the center between the front wheels and the rear wheels allows to dress and adjust layer by layer the materials to have a perfect planimetry. Then we proceed to the finishing operation which is generally carried out with a road finisher which proceeds to the finishing spreading of a coated layer, of concrete, of serious cement, or on stabilized soils of sand or other materials of finish.

To carry out these various operations, it was therefore necessary to use a bulldozer, plus a grader, plus a finisher, or three different machines. It goes without saying that these machines are very expensive and increase the cost of carrying out the work.

It is known that the grader is sometimes equipped with a front blade to push and spread out piles left by the trucks that have tipped the materials: these must be roughed out a first time, and a second time with the leveling blade.

The driver makes a perfect adjustment of the materials in according to the altitudes preferably indicated by the site supervisor.

It is also known that in order to then spread the finishing layer, a finisher must be used: this must be provided with push rollers located at the front in order to push the trucks which dump the materials into the hopper or receptacle designed for this purpose.

When we also want, either before the operation, or after if we realize that we have to do it again, scarify the material placed on the surface and compacted on the ground to eliminate it or modify its consistency, we use a machine scarifier with teeth that plow the soil, then with a bulldozer or leveler, the material thus disaggregated is released in order to prepare a support suitable for the operations described above. Thus the conventional process described above involves the use of various machines and its execution requires a significant time.

The problem is then to make embankments according to the operations described above using as few machines as possible and at best a single multifunction machine which performs some of these operations simultaneously, or one after the other depending on the need for the work. .

One solution to the problem posed is to have a machine already known elsewhere for carrying out certain construction operations for these embankments and others and having a blade for pushing materials, such as for example a grader-finishing machine and a multifunction device mounted at the front of this machine which comprises said blade which is then composed of two parts, low and high, which in the position of pushing said materials are closed in continuity with one another, which upper part comprises rollers and is mounted on pivots allowing its reversal so that said rollers can rotate about axes in the opposite direction of travel in contact with the wheels of a truck killed in front of said machine and under the effect of the thrust of this one. In a preferred embodiment, said chassis carrying the blade comprises at its lower part and behind said blade, teeth of surface scarifier, which teeth are mounted on pivots, at two positions relative to the chassis, and whose low scarification position, when the machine is doing this work in reverse, allows them to be raised by releasing backwards when the machine is in forward gear. The result is a new multifunction device that can be adapted to various machines and makes it possible to reduce the number of these in embankment or other construction work. Indeed, one thus finds on the same device a blade to push the materials, pusher rollers to push the trucks which pour the materials, and teeth of scarifier: these various devices can be used independently of each other or successively, or in combination with each other depending on the work to be performed by the entire machine on which the device is mounted. If this machine is itself a multifunctional grader-finisher, a single machine is thus obtained for carrying out all the operations of construction of an embankment as described in the introduction above.

In the present invention, the scarifier teeth of materials used during a road reprofiling, have the particularity of being released when the machine advances in order to make earthwork with the pusher blade; and when the machine is in reverse, the teeth scarify if necessary the surface of road or other materials. This set of combinations, which constitutes the device mounted on a carrying frame, is connected integrally to the rear center by a hydraulic pivot; it is held by a second chassis secured to the machine; the hydraulic pivot having inter alia a release function in order to be able to push the trucks. This second chassis secured to the first by means of the hydraulic pivot is also mounted on a pivot to the main chassis of the machine such as a finisher, this second chassis already being known elsewhere.

The present invention provides, at the front of any machine and in particular of a finisher, a set of technical combinations unknown to date and particularly advantageous and even more versatile and important by the embodiment of the invention. This is described below and shown by way of nonlimiting example in appended schematic drawings in which:

Figure 1 is a side view of the device showing the upper part of the inverted blade and the pusher rollers in contact with the wheels of a truck, the assembly being reassembled and held by a chassis.

Figure 2 is a side view showing the front blade with these rollers tilted backwards and this assembly being lowered.

FIG. 3 is a view of the rear of the device showing the front blade, the hydraulic means, the scarifier teeth, the rollers and the pivots.

Figure 4 is a side view showing the front blade lowered and the scarifier teeth lowered and scarifying the materials in reverse. Figure 5 shows the device according to the invention mounted on a leveler finisher.

FIG. 1 represents a blade 11 for pushing the materials into a position indicated in dotted lines and shown in FIG. 2, and / or the wheels 18 of a truck in the position shown in solid lines, the upper part 14 being turned over 17 is held by pivot axes 27: over a part of the length of this blade 11 are mounted rollers 12 held at their ends by axes 28. The upper part 14 of the blade 11 can be turned over by the action of hydraulic means 15 which allow the rollers 12 to come into contact with the wheels of the truck 18 and which can rotate in the opposite direction of travel in order to allow the truck to be pushed by the machine 10 on which the device can be mounted, such as a finisher. The blade 11 is released 29 by means of a hydraulic pivot 30 carrying the frame 31 carrying the blade 11. The hydraulic pivot 30 mounted in the center of the device makes it possible to mount 29 and descend 36 the latter relative to the machine 10 and to have a range of angles thanks in addition to the part 32 of this pivot fixed to the machine 10: this part is in fact a support frame for lifting and tilting 34 of the entire device thanks to a hydraulic means 33. FIG. 2 is a side view showing the blade 11 lowered 36 and the upper part 14 being turned upside down 37, the rollers tilted backwards so that the blade is complete and closed for pushing and roughing the heaped materials left by the trucks in front of the machine 11, the knives 38 of the blade being lowered to the level of the ground to be scraped.

Figure 3 is a front view mounting the blade 11 equipped with knives 38 at the lower end of the blade; the hydraulic means 15 for tilting the upper part 14 around the axes 27 are mounted on pivot axes at the lower part 39 and at the upper part 40. This movable frame supporting the upper blade 14 supports the rollers 12 mounted on pivot axes 28 and the main blade holder chassis is designed to receive scarifier teeth 13. These teeth 13 mounted on easily removable pivots 41 can be placed in two positions: here they are in the high rest position. At its central part, the main chassis carrying the blade 11 is designed so as to receive a hydraulic pivot 30: this means with two functions, to raise 29 the main chassis, to lower it 36, depending on the work to be carried out and the 'orient on this same pivot.

Figure 4 is a side view showing the assembly of the two blades 11 and 14, lowered 36, the machine 10 performing reverse work 42. These works can be surface scarification 43, for this, the teeth 13 have been lowered by changing the pivots 41 of level, in the low position. These pivots 41 being designed so as to be able to cause the teeth 13 to move backwards 44 when the finisher is moving forward in order to push the scarified materials 43.

FIG. 5 represents an overall view of the device according to the invention mounted at the front of a machine such as a leveler finisher 10 then having a blade 11: the device comprises a chassis 31 which comprises at its upper part rollers 12 and at its lower part of the scarifier teeth 13, the upper part 14 of the blade being turned over using hydraulic means 15, the fasteners 16 of the rollers being designed so as to allow turning over 17 and coming into contact with the wheels 18 of a truck; the latter has a tilting skip 19 which pours the materials into and above the hopper 20 of the self-propelled leveler 10 21 provided with tracks 22. At the rear, this same finisher has for example a curved leveler blade 23 for pushing and level said materials and is equipped with vibrating pads 24; this assembly being held by arms 25 attached to hydraulic means 26.

Claims

CLAIMS 1 Multifunction device mounted at the front of the machine for the construction of road embankments, and the like and which comprises a blade (11) for pushing materials characterized in that said blade (11) is composed of two parts, low and high (14), which in the position of pushing said materials are closed in continuity with one another, which upper part comprises rollers (12) and is mounted on pivots (27) allowing it to be turned over (17) in such a way that said rollers (12) can rotate around axes (28) in the opposite direction of travel in contact with the wheels (18) of a truck located in front of said machine (10) and under the effect of the thrust of that -this. 2. Multifunctional arrangement according to claim 1 characterized in that the frame (31) carrying the blade (11) comprises at its lower part and behind said blade (11), teeth (13) of surface scarifier, which teeth (13) are mounted on pivots (41), at two positions relative to the chassis (31), and whose low scarification position, when the machine performs this work in reverse (42), allows them to be raised by disengagement (44) backwards when the machine (10) is in forward gear. 3. Multifunction device according to any one of claims 1 and 2 characterized in that the upper part (14) of the blade turns over by the action of hydraulic means (15). 4. Multifunction device according to any one of claims 1 to 3 characterized in that said chassis (31) is mounted on a hydraulic pivot (30) at its central part allowing the device to go up (29) and go down (36) relative to the machine (10) and the blade (11) to take different orientations (37). 5. Multifunction device according to claim 4 characterized in that the part (32) of said pivot (30) fixed to the machine (10) is a lifting and tilting support frame (34) of the entire device thanks to a hydraulic means (33). 6. Multifunction device according to any one of claims 1 to 5 characterized in that it is mounted at the front of a leveling machine (10, 21) comprising a hopper (20) for supplying materials from said truck (19) and a curved blade (23) for pushing and leveling said materials.