Installation For Power Generation By Means Of Vehicular Traffic

Abstract

Installation for power generation by means of vehicular traffic that can be located at floor level (2) of a vehicles traffic lane, wherein it has generator of electrical energy (5) modules, each of which includes: a set of mobile crossbar components (20) mounted over both sets (21a) of hydraulic cylinders (21), an hydraulic circuit (3), a linear hydraulic actuator (32), movement transformer mechanism (4) from straight swinging movement into a one-way rotating movement, and a generator (5) of electrical energy; each crossbar component (20) is moved by the own weight of the vehicles (7) crossing it, propelling a set of hydraulic cylinders (21) that, through the hydraulic circuit (3), are connected to the linear hydraulic actuator (32); this last one, through the movement transformer mechanism (4), propels the rotating movement of the electrical generator (5). When the wheel (70) of a vehicle (7) steps a mobile crossbar component (20), this last one moves downwards, so it propels the mobile arms (22) of the hydraulic cylinders (21). Once the descending cycle ends, the automatic repositioning of the crossbar component (20) takes places as a result of the floor elastic means (23).

Claims

1. Installation for power generation by means of vehicular traffic, located at floor level of a vehicle traffic lane, comprising: at said floor level, a plurality of mobile crossbar components that are reversibly movable from their usually emerging position in response to weights of crossing vehicles; a plurality of hydraulic sets, each of the hydraulic sets having a plurality of hydraulic cylinders, wherein mounted over each of the hydraulic sets is a respective one of the plurality of mobile crossbar components; means for the generation of electrical energy in response to movement of said plurality of mobile crossbar components, characterized in that the means for generation of electrical energy includes one or more modules for generating electrical energy, each of the one or more modules comprising (a) a plurality of hydraulic circuits coupled to the plurality of hydraulic sets, (b) one or more linear hydraulic actuators coupled to at least some of the plurality of hydraulic circuits for producing a straight reciprocating movement, (c) one or more movement transformer mechanisms for transforming the straight reciprocating movement from one of the one or more hydraulic actuators into a one-way rotating movement, and (d) one or more generators of electrical energy driven by the one-way rotating movement from the one or more movement transformer mechanisms; said mobile crossbar components forming a compound floor wherein each of the mobile crossbar components have one or more automatic repositioning means, each of the mobile crossbar components being arranged to propel a respective one of the plurality of hydraulic sets, each of said plurality of hydraulic sets being connected to its one or more linear hydraulic actuators through the plurality of hydraulic circuits, and each of said one or more linear hydraulic actuators, through its one or more movement transformer mechanisms, powering the one-way rotating movement of the one or more generators of electrical energy.

2. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that the one or more modules for generating electrical energy being more than one in number.

3. Installation for power generation by means of vehicular traffic, according to claim 1 characterized in that the mobile crossbar components are elongate elements arranged to cross the vehicle traffic lane.

4. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that the one or more automatic repositioning means include elastically yielding means for allowing each of the plurality of mobile crossbar components to cycle between a normally emerging position and a descended position in response to vehicle passage on the vehicle traffic lane, wherein descending of each of the plurality of mobile crossbar components actuates a respective one of the plurality of hydraulic sets that each have said plurality of hydraulic cylinders.

5. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that each hydraulic set is actuated by the same one of the plurality of mobile crossbar components.

6. Installation for power generation by means of vehicular traffic, according to claim 5, characterized in that the plurality of hydraulic cylinders of each individual one of the plurality of hydraulic sets is actuated by the same mobile crossbar component.

7. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that each of the plurality of hydraulic sets is connected to an inlet of a respective one of the one or more linear hydraulic actuators through a respective one of the plurality of hydraulic circuits.

8. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that each linear hydraulic actuator has one or more inlets connected to one or more of the plurality of hydraulic sets.

9. Installation for power generation by means of vehicular traffic, according to claim 8, characterized in that each of the one or more linear hydraulic actuators has its one or more inlets connected to more than one of the plurality of hydraulic sets.

10. Installation for power generation by means of vehicular traffic, according to claim 1, characterized wherein more than one of the plurality of mobile crossbar components are associated with different ones of the plurality of hydraulic sets, the different ones driving a single one of the one or more linear hydraulic actuators, to cause the different ones to operate the single one asynchronously.

11. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that each of the one or more linear hydraulic actuators includes a linear gear rack that follows a reciprocating movement and is connected to one of the one or more movement transformer mechanisms.

12. Installation for power generation by means of vehicular traffic, according to claim 11, characterized in that the linear gear rack includes a slide rail.

13. Installation for power generation by means of vehicular traffic, according to claim 11, characterized in that each of the one or more hydraulic actuators has a spring motor mechanism coupled to the linear gear rack, the linear gear rack being arranged to move in (a) an active cycle driven by a currently corresponding one of the plurality of the hydraulic sets and in a direction to charge the spring motor mechanism, and (b) a passive cycle driven by the spring motor mechanism that was charged during said active cycle.

14. Installation for power generation by means of vehicular traffic, according to claim 13, characterized in that each correlated group of the plurality of mobile crossbar components that are correlated by being associated with those of the plurality of hydraulic sets that are connected to the same one of the one or more linear hydraulic actuators, members in each correlated group are spaced from each other, in such a manner that said correlated group operates in alternating active and passive cycles that are distinct from the linear gear rack of said same one of the one or more of the linear hydraulic actuators.

15. Installation for power generation by means of vehicular traffic, according to claim 14, characterized in that said correlated group of the plurality of mobile crossbar components are interleaved with uncorrelated ones of the plurality of mobile crossbar components that are associated with uncorrelated ones of the plurality of hydraulic sets that are not connected to said same one of the one or more of the linear hydraulic actuators, in such a manner that operation across the plurality of mobile crossbar components is asynchronous and that the plurality of hydraulic cylinders of each of the plurality of hydraulic sets cycles synchronously relative to respective ones of the one or more linear hydraulic actuators.

16. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that the movement transformer mechanism includes a ratchet type mechanism having an output shaft that rotates in only one direction.

17. Installation for power generation by means of vehicular traffic, according to claim 1 characterized in that each of the one or more modules for generating electrical energy includes a spring motor mechanism, the one-way rotating movement of each of the one or more electrical generators is coupled to and powered by an associated one of the one or more of linear hydraulic actuators acting through the movement transformer mechanism and though the spring motor mechanism, said spring motor mechanism being operable to accumulate in an accumulation cycle a store of potential mechanical energy received from said one or more movement transformer mechanisms while, in a releasing cycle, release said store of potential mechanical energy in order to drive the one or more generators of electrical energy.

18. Installation for power generation by means of vehicular traffic, according to claim 17, characterized in that the spring motor mechanism is linked to one of the one or more movement transformer mechanisms.

19. Installation for power generation by means of vehicular traffic, according to claim 1, each of the one or more modules having among their one or more generators of electrical energy, at least, one service board characterized by being adapted to connect to, at least, one load network or circuit.

20. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that the hydraulic circuit is of the oleo-hydraulic type.

21. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that each of the one or more generators of electrical energy comprises an alternator that works in both directions of rotation.

22. Installation for power generation by means of vehicular traffic, according to claim 17, comprising a plurality of reducer mechanisms of a mechanical transmission, characterized in that the one or more generators of electrical energy are each propelled by its spring motor mechanism through the associated one of the plurality of reducer mechanisms of the mechanical transmission.

23. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that the compound floor comprises an open fixed structure that, together with the plurality of mobile crossbar components, form the compound floor that is prepared for the circulation of vehicles, the open fixed structure having a plurality of cross passages that allow ascending and descending movements of the plurality of mobile crossbar components.

24. Installation for power generation by means of vehicular traffic, according to claim 23, characterized in that the fixed structure comprises a frame that is adapted to be mounted at the floor level of the vehicle traffic lane and includes a plurality of stationary crossbars separating a plurality of cross passages.

25. Installation for power generation by means of vehicular traffic, according to claim 1, characterized in that the plurality of mobile crossbar components provide a passenger ascent and descent station for the crossing vehicles, wherein a number of the plurality of said mobile crossbar components can be fitted between a wheel-supporting front axle and a wheel-supporting rear axle of said crossing vehicles, those ones of the plurality of mobile crossbar components immediately preceding the oncoming wheels of said vehicles, contributing to vehicle braking.

Description

DRAWINGS

[0013] For better clarity and understanding of the object of the invention, it is illustrated with several figures where it has been represented in one of its preferred embodiments, everything as an illustrative example, without limitation:

[0014] FIG. 1 is bottom perspective view of the present installation, in an embodiment wherein it is formed by four generator modules. Under these mobile crossbar components, that form the floor for vehicles, the hydraulic components, mechanisms and generators corresponding to each generator module can be observed.

[0015] FIG. 2 is a front perspective view of the installation of FIG. 1. Under the front mobile crossbar component, its respective aligned set of hydraulic cylinders can be observed, as well as the elastic means of the floor.

[0016] FIG. 3 is an upper perspective view of the present installation placed in front of a passengers stop. Over the installation, the circulation of a passenger vehicle can be observed.

[0017] FIG. 4 is a front perspective view of the installation, arranged in front of a passengers stop and above which a passenger vehicle circulates. The composed floor includes a fixed component structure.

[0018] FIG. 5 is an upper perspective view of the installation of FIG. 1, where it can be appreciated how a wheel applies the weight of a vehicle to the actuation of the first mobile crossbar component that appears descended, and thus activating the respective hydraulic cylinders.

[0019] FIG. 6 is an upper perspective view of the installation, as the one of FIG. 5. In this case, the compound floor includes a fixed component structure, through which crossed passages, the mobile crossbar components move.

[0020] FIG. 7a is a perspective view of the movement transformer mechanism and its link, on the one hand, with the linear gear of the swinging impeller arm and, on the other hand, with the generator of electrical energy.

[0021] FIG. 7b is a detail of the perspective view of FIG. 7a. The different component of the movement transformer mechanism can be appreciated, as well as the ratchet and spring motor mechanisms.

[0022] FIG. 8a is a perspective detail as the one of FIG. 7b, wherein, through arrows, the movements of the powertrain formed by the linear gear, the ratchet mechanism, the movement transformer mechanism and the spring motor mechanism are shown. In this case, the movements corresponding to the active cycle are shown, where said movements are propelled by the emerging movement of the swinging impeller arm.

[0023] FIG. 8b is a perspective detail as in FIG. 7b, wherein through arrows, the movements of the cinematic chain are shown. In this case, the movements corresponding to the passive or reactive cycle are shown. During this cycle, the spring motor downloads the accumulated energy propelling the electrical generator while the swinging impeller arm moves back and the ratchet mechanisms disengages the cogwheel driven by the movement transformer mechanism.

[0024] FIG. 9 is a perspective view of the hydraulic actuator, wherein the two connections with the hydraulic circuit ducts can be observed and the impeller arm can also be observed. As regards the latter, both the linear gear and the slide rail can be observed.

[0025] FIG. 10 is a perspective view of the hydraulic actuator, in another embodiment, wherein many connections are arranged for both ducts of the hydraulic circuit.

[0026] FIG. 11a is a partial longitudinal cut of the hydraulic actuator, according to a cutting plane that is stated as XIa-XIa in FIG. 10. This cut allows observing the impeller piston and the impeller arm, as well as the return elastic acting over said piston.

[0027] FIG. 11b is a detail of the cut of FIG. 7a, wherein both the link between the linear gear and the driven cogwheel can be seen, as well as the elements of the ratchet mechanism.

[0028] FIG. 12 is a schematic representation of one of the generator modules wherein the main component parts can be distinguished.

[0029] FIG. 13 is a schematic representation wherein an embodiment of the hydraulic circuit is shown. In this case, the following arrangement can be observed: [0030] The first and fifth crossbar components, through the first and fifth hydraulic ducts, are connected with the first hydraulic actuator; [0031] The second and sixth crossbar components, through the second and sixth hydraulic ducts, are connected with the second hydraulic actuator; [0032] The third and seventh crossbar components, through the third and seventh hydraulic ducts, are connected with the third hydraulic actuator; and [0033] The fourth and eighth crossbar components, through the fourth and eighth hydraulic ducts, are connected with the fourth hydraulic actuator.

[0034] FIGS. 14a, 14b and 14c are both partial side views that, as a whole, show a step sequence of a wheel of a vehicle, though the mobile crossbar components. It can be observed how, as they are stepped by the wheel, the mobile crossbar components decrease. This way, the asynchronous actuation of the respective sets of hydraulic cylinders is produced. The dotted lines arrows show the movement direction (not illustrated), while the curved arrows show the direction of rotation of the wheel of said vehicle.

[0035] FIG. 15 is a schematic representation that shows the interposition of several mobile crossbar components in the presence of the wheels of a vehicle, which contributes to

[0036] In the different figures, the same numbers and/or reference letters indicate equal or corresponding parts.

LIST OF THE MAIN REFERENCES

[0037]

TABLE-US-00001  (1) Generator Module  (2) Compound floor (20) Mobile crossbar component (20a) First mobile crossbar component [in FIG. 13]. (20b) Second mobile crossbar component [in FIG. 13]. (20c) Third mobile crossbar component [in FIG. 13]. (20d) Fourth mobile crossbar component [in FIG. 13]. (20e) Fifth mobile crossbar component [in FIG. 13]. (20f) Sixth mobile crossbar component [in FIG. 13]. (20g) Seventh mobile crossbar component I [in FIG. 13]. (20h) Eighth mobile crossbar component [in FIG. 13]. (20x) Cross length of the components (20). (20y) Width of the components (20). (21) Hydraulic cylinders. (21a) Set or alignment of hydraulic cylinders (21). (22) Mobile arms. (23) Floor elastic means. (24) First hydraulic connections. (25) Fixed component structure. (26) Cross passages [whereby mobile crossbar components move (20)]. (27) Fixed crossbars.  (3) Hydraulic circuit. (30) Hydraulic ducts. (30a) First hydraulic duct [in FIG. 13]. (30b) Second hydraulic duct [in FIG. 13]. (30c) Third hydraulic duct [in FIG. 13]. (30d) Fourth hydraulic duct [in FIG. 13]. (30e) Fifth hydraulic duct [in FIG. 13]. (30f) Sixth hydraulic duct [in FIG. 13]. (30g) Seventh hydraulic duct [in FIG. 13]. (30h) Eighth hydraulic duct [in FIG. 13]. (31) Second hydraulic connections. (32) Hydraulic actuator. (32a) First hydraulic actuator [in FIG. 13]. (32b) Second hydraulic actuator [in FIG. 13]. (32c) Third hydraulic actuator [in FIG. 13]. (32d) Fourth hydraulic actuator [in FIG. 13]. (33) Impeller piston (34) Return elastic (35) Swinging impeller arm (36) Linear gear (37) Slide rail  (4) Movement transformer mechanism. (40) Driven cogwheel (41) Ratchet mechanism (42) Drive shaft (43) Driver pinion. (44) Driven pinion. (45) Spring motor mechanism. (46) Spring motor anchoraje.  (5) Generator of electrical energy. (50) Stator. (51) Reducer.  (6) Service circuit [of the generated electrical energy]. (60) Service line. (61) Service Board.  (7) Vehicle. (70) Vehicle Wheel. (71a) Front axle of the vehicle (7). (71b) Rear axle of the vehicle (7).

DESCRIPTION

[0038] In general terms, the present invention refers to an installation for the generation of energy through vehicular traffic, that can be located at floor level (2) of a vehicles traffic lane, wherein it has generator of electrical energy (5) modules, each of which includes: a set of mobile crossbar components (20) mounted over both sets (21a) of hydraulic cylinders (21), an hydraulic circuit (3), a linear hydraulic actuator (32), movement transformer mechanism (4) from straight swinging movement into a one-way rotating movement, and a generator

[0039] (5) of electrical energy; each crossbar component (20) is moved by the own weight of the vehicles (7) crossing it, propelling a set of hydraulic cylinders (21) that, through the hydraulic circuit (3), are connected to the linear hydraulic actuator (32); this last one, through the movement transformer mechanism (4), propels the rotating movement of the electrical generator (5).

[0040] The following is a description of some of the main embodiments.

DETAILED DESCRIPTION

[0041] The present installation is located at floor level of a vehicles (7) traffic lane, in order to be actuated by the wheels (70) through which the action of the weight of the vehicles (7) crossing it is applied.

[0042] This is a modular-type installation since, as of at least one generator module (1), as many modules (1) as required can be arranged according to the amount of electrical energy desired.

[0043] Each generator module (1) includes, at least: a set of mobile crossbar components (20) mounted over both sets (21a) of hydraulic cylinders (21), an hydraulic circuit (3), a linear hydraulic actuator (32), a movement transformer mechanism (4) from straight swinging movement into a one-way rotating movement, and a generator (5) of electrical energy.

[0044] In particular, the mobile crossbar components (20) are long-shaped and narrow structural elements arranged in such a manner that they cross the vehicles (7) traffic lane. They are placed abuttingly side by side, in a way that as a whole they form the compound floor (2) of the installation. Each of these crossbar components (20) are reversible movable from their usually emerging position, until a descending or sunken position, from which they resume due to the action of a plurality of floor elastic means (23) that are elastically yielding. The elastic means (23) are arranged throughout each crossbar component (20) and are the ones conducting the automatic repositioning of these last ones.

[0045] Each mobile crossbar component (20) is mounted over a respective set (21a) of hydraulic cylinders (21) that are propelled when descending. In said set (21a) the hydraulic cylinders (12) can form an alignment that is arranged throughout the respective crossbar component (20).

[0046] The hydraulic cylinders (21) are connected to the lineal hydraulic actuators (32) through a hydraulic circuit (3) of oleo-hydraulic fluid.

[0047] In one embodiment, all the hydraulic cylinders (21) of one same alignment or set (21a)—corresponding to the same crossbar component (20)—have the first connections (24) connected to a same hydraulic duct (30). On the one hand, all the hydraulic ducts (30) of the same module (1) are connected to the second connections (31) of a same linear hydraulic actuator (32).

[0048] On the other hand, the compound floor (2) is installed in a manner that the mobile crossbar components (20) of a same module (1)—which respective sets (21a) of hydraulic cylinders (21) are connected (24) to a same linear hydraulic actuator (32)—have an asynchronous operation. This is achieved arranging the crossbar components (20) of each module (1) separated and placing one after another, in such a manner that their actuation by the wheels (70) of the vehicles (7) is asynchronous or not simultaneous. Therefore, the actuations of one same linear hydraulic actuator (32) are produced in different moments and in different active cycles of the linear gear (36) of rack, in such a way that each set or alignment (21a) of hydraulic cylinders (21) act after completing the passive cycle of the respective linear hydraulic actuator (32).

[0049] Each linear hydraulic actuator (32) includes Swinging impeller arm (35) with a linear gear (36) of rack, that is externally projected regarding the body of the hydraulic actuator (32)

[0050] Each linear hydraulic actuator (32) includes a swinging impeller arm (35) with a linear gear (36) of rack, that is outwardly projected regarding the body of the hydraulic actuator (32). Said impeller arm (35) works with a swinging movement over a slide rail (37) that maintains it correctly placed. Inwardly, the mentioned swinging impeller arm (35) is linked to am impeller piston (33) that moves with an active cycle and a passive cycle. In the active cycle, the mentioned impeller piston (33) acts under the influence of the hydraulic cylinders (21), while in the passive cycle it acts under the influence of a return elastic (34) that is loaded in the active cycle.

[0051] The mentioned linear gear (36) engages with a movement transformer mechanism (4) that includes a driven cogwheel (40), wherein the straight movement of the linear gear (36) is transformed in a rotation movement of said driven cogwheel (40). This intermittent rotation movement is in one sense, due to the presence of a first ratchet mechanism (41) linked to a drive shaft (42).

[0052] The mentioned drive shaft (42) is mounted over a gear system that, in this case, deviates the transmission through a driver pinion (43) that acts over a driven pinion (44). This last one propels a spring motor mechanism (45) that, on the one hand, accumulates the mechanical energy transmitted by said transformer mechanism (4) while, on the other hand, releases said energy. Both the accumulation cycle and the releasing cycle of said spring motor (45) this device propels the electrical generator (5).

[0053] On the different modules (1), the generators (5) of electrical energy may be alternators that work in both directions of rotation.

[0054] For their part, the mentioned generators of electrical energy (5) are connected to a service circuit (6) wherein, through one or more electrical service lines (60), provide the generated electrical energy to one or more service boards (61). The corresponding connection means that are necessary for the load networks or circuits that need to be powered, can be arranged therein.

[0055] The possibility that the compound floor (2) includes a fix and open component structure (25) has been foreseen. It is a structure that can be mounted at superficial level of the street and fixed to the existing structures in the installation place. This structure (2) is crossed by a plurality of cross passages (26) whereby the ascending and descending movements of the mobile crossbar components (20) are produced when they are stepped by the wheels (70) of the circulating vehicles (7).

[0056] The mentioned cross passages (26) are separated with each other due to the presence of crossbars (27) that delimit them and that form the fix part of the mentioned compound floor (2).

[0057] On the other hand, it has been foreseen that this installation may form part of an ascent and descent passenger station for transport vehicles (7). In this case, the width (20y) of the mobile crossbar components (20) shall be such that a plurality of said mobile crossbar components (20) can be fitted between the front axle and the rear axle of said vehicles (7). Therefore, these last ones (20) are brought one after the other before the wheels (70) of said vehicles (7), contributing to the braking at said station.

[0058] Operation:

[0059] When the wheel (70) of a vehicle (7) steps a mobile crossbar component (20), this last one moves downwards, so it propels the mobile arms (22) of the hydraulic cylinders (21). Once the descending cycle ends, the automatic repositioning of the crossbar component (20) takes places as a result of the floor elastic means (23).

[0060] Each set (21a) of hydraulic cylinders (21) transmits its pressure through the common hydraulic duct (30) that, through the second hydraulic connections (31) actuates the impeller piston (33) of the hydraulic actuator (32).

[0061] Together with the mentioned impeller piston (33), the swinging impeller arm (35) that emerges from the hydraulic actuator (32) moves, and therefore its linear gear (36) of rack rotates the driven cogwheel (40). In this manner, the active cycle of the movement transformer mechanism (4) takes place, wherein the straight swinging movement is transformed into a rotation movement.

[0062] The ratchet mechanism (41) operates in a way that, during the mentioned active cycle, it engages the driven cogwheel (40) with the drive shaft (42). This last one, at the same time, propels the driver pinion (43) that moves the driven pinion (44), which discharge propels the electrical generator (5).

[0063] Furthermore, during the passive or active cycle of the movement transformer mechanism (4), the ratchet mechanism (41) disengages and the swinging impeller arm (35) returns, due to the effect that the return elastic (34) has over the impeller piston (33).

[0064] On the other hand, the mobile crossbar components (20), which respective sets (21a) of hydraulic cylinders (21) are connected to the same linear hydraulic actuator (32), are arranged separated between with each other in such a way their operation is asynchronous and is produced in active cycles different from the linear gear (36) of rack corresponding to said actuator (32). These mobile crossbar components (20) are arranged interleaved with other mobile crossbar components (20) connected to other linear hydraulic actuators (32), in such a manner that the operation of all the mobile crossbar components (20) is asynchronous and that each set (21a) of hydraulic cylinders (21) act after the passive cycle of the respective linear hydraulic actuator (32). For example, a mobile crossbar component (20) corresponding to a first linear hydraulic actuator (32) may be arranged following four crossbar components (20) corresponding to said other actuators (32) and after another crossbar component (20) that also corresponds to said first actuator (32).

[0065] For example, FIG. 13 shows an embodiment wherein the following can be observed: [0066] The first (20a) and fifth (20e) crossbar components (that are separated by the interposition of the second (20b), third (20c) and fourth (20d) components) are connected to the first hydraulic actuator (32a), through the first (30a) and fifth (30e) hydraulic ducts; [0067] The second (20b) and sixth (20f) crossbar components (that are separated by the interposition of the third (20c), fourth (20d) and fifth (20e) components) are connected to the second hydraulic actuator (32b), through the second (30b) and sixth (30f) hydraulic ducts; [0068] The third (20c) and seventh (20g) crossbar components (that are separated by the interposition of the fourth (20d), fifth (20e) and sixth (f) components) are connected to the third hydraulic actuator (32c), through the third (30c) and seventh (30g) hydraulic ducts; and [0069] The fourth (20d) and eighth (20h) crossbar components (that are separated by the interposition of the fifth (20e), sixth (20f) and seventh (20g) components) are connected to the fourth hydraulic actuator (32d), through the fourth (30d) and eighth (30h) hydraulic ducts.

[0070] With this arrangement, the two mobile crossbar components (20) that operate over the same actuator (32), can do it at different moments, giving time to, in each case, complete the passive cycle.

[0071] Undoubtedly, upon putting the present invention into practice, modifications may be introduced regarding certain construction details and form, without leaving the essential principles that are clearly explained in the claims below: