WO2015067825A1

WO2015067825A1 - Chassis for a two-seater vehicle

Info

Publication number: WO2015067825A1
Application number: PCT/ES2013/000247
Authority: WO
Inventors: Francisco GÓMEZ-CUÉTARA FERNANDEZ
Original assignee: Gómez-Cuétara Fernandez Francisco
Priority date: 2013-11-06
Filing date: 2013-11-06
Publication date: 2015-05-14

Abstract

The invention concerns a chassis consisting of four longitudinal volumes, such that they all adopt an arrangement in which they extend along the vehicle, the main volume being delimited in the form of a safety cell, protected by the other three volumes. The second volume (V2) is intended to accommodate the engine-transmission assembly and is disposed at the bottom and inside the volume (VI) or passenger compartment, whilst two lateral longitudinal volumes (V3, V4) are disposed symmetrically laterally relative to the passenger compartment, these latter volumes also having functions serving storage and repair purposes or incorporating other parts such as the fuel tank, front and rear axles, etc., and acting as safety components with respect to all types of impact which they absorb by means of resilient programmed permanent deformations, in their peripheral bumpers, in the four volumes, resulting in moderate deceleration. The chassis is accessed from the rear by way of a door supported in volumes (V1 and V2).

Description

CHASSIS FOR TWO-VEHICLE VEHICLE

fi F S r R I P f í O N

OBJECT OF THE INVENTION

The present invention relates to a chassis that has been specially designed for obtaining a two-seater vehicle of small dimensions on the ground, which can be easily parked (in a single maneuver) on public roads, so that its length is adequate to the regulatory width of the parking spaces in line, so that said vehicle can be parked on battery in a small space of an online parking space without protruding from the road, being able to take advantage of reduced spaces or gaps between parked vehicles that in conditions Legal could not be taken advantage of even by current four-wheelers and two-seater vehicles.

The object of the invention is therefore to provide a very small and light, manageable, compact vehicle, all without prejudice to high performance in active and passive safety and which make the vehicle extremely safe, comfortable, manageable and light, and therefore also economic in cost and consumption and consequently ecological. The invention focuses on the special distribution of its 4 Longitudinal volumes and also arranged throughout, which make up the chassis of the vehicle. Thanks to them, a compact vehicle is obtained, but at the same time very safe, with high resistance to all types of impacts, both lateral and frontal, rear or accordion, being at the same time comfortable for both passengers and also with a capacity of unprecedented load, approximately 350 L, obtaining an economical, ecological and low-mass vehicle, and due to this, the need for large displacement or power engines, which results in minimal consumption. The low mass of the vehicle is mainly due to the fact that it does not have side doors, which weaken the chassis and consequently it is not necessary to strengthen or thicken with more materials what has not been weakened, and also due to the good use of the spaces, which allows the chassis of the invention with its four volumes, which makes possible a very small car (without losing resistance) and consequently less heavy.

This chassis can incorporate internal combustion engines, electric, hybrid, compressed air or any other type. The chassis can be manufactured by forming the volumes by stamping or by molds and the materials can be of a preferred nature, be they metallic, or plastic, or the like.

Consequently, the field of application of the invention is none other than that of the automobile sector, and more specifically that of compact four-wheeled motorized vehicles or even tricycles with similar configuration of their 4 volumes and rear door. BACKGROUND OF THE INVENTION

In the practical scope of the invention, that of compact four-wheeled compact motor vehicles, many small-sized models are known, which, due to the distribution of their "volumes", achieve a reduction in the width of the vehicle, but nevertheless, due to the commented distribution of the current cars built with transverse volumes, in which a previous volume is defined in which the vehicle's engine and the mechanics associated with it are established, a central volume, or passenger compartment, for the occupants of the vehicle, and a subsequent volume for loading the luggage, this distribution means that the total length of the vehicle exceeds the standardized width of the online parking spaces, which means that they can only be parked in line, with the limitations that this implies, not being able to take full advantage of the advantages that are assumed to a vehicle of r Educated dimensions, in addition to the loss of resistance, to passive safety.

While it is true that document FR 2530212 discloses a small motor vehicle for two people with four wheels, with front and rear access, in which the volume of the engine is established under the passenger seats, achieving a reduction in the total length of the vehicle, the volumes destined for the storage of luggage continue to be located before and / or subsequently to the central or interior volume of the vehicle, so that this vehicle is substantially unprotected against lateral and frontal impacts, since , although it includes safety reinforcements based on metal bars that stiffen the lateral structure of the car, these types of structures only partially prevent the deformation of the passenger compartment from a side impact, but they do not absorb the energy produced in said impact, energy that is transmitted to the driver and / or occupants of the vehicle, with consequences that can be fatal. This dangerous situation is aggravated in other vehicles of this type that have side doors for access to the passenger compartment of the vehicle, which significantly decreases the structural rigidity of said passenger compartment, among which can be cited, among others, and merely by way of example records WO 2009-077548 and ES 2318524.

DESCRIPTION OF THE INVENTION

The two-seater vehicle chassis that the invention proposes, solves in a fully satisfactory manner the aforementioned problem, allowing to obtain from it a very safe vehicle against any type and direction of impact, and which can be parked transversely on a parking space without stand out from it, allowing to optimize the available space, in addition to defining an economical, ecological vehicle with great load capacity and reduced weight.

For this, the chassis of the invention starts from a first main volume that is longitudinal and is intended for the passenger compartment, a container for the space for the two people that fit in the vehicle, and that are arranged in line or tandem, sitting astride the two seats formed on the top of the second volume. This volume is also longitudinal and internal to the first volume. It is defined with a fairing for the engine / transmission assembly, etc., which is also arranged in longitudinal sense, while, laterally to the whole of the volume of the passenger compartment, it is associated with each side a third and fourth volumes also longitudinal, which frame the main volume or passenger compartment, joining the four volumes to increase the safety of passengers and increasing considerably with the sides the total load capacity of the vehicle.

Below the first and second volume two cross beams are established that divide the chassis transversely into three similar parts, from whose protruding ends, 2 + 2 ribs emerge that are fixed to the first volume and which subdivide the third and fourth lateral volumes into three similar parts that also stiffen the chassis. In the first third of both lateral volumes, the wheel arch, the front train and above the front lights and the fairing of both rear-view mirrors are established, which are preferably shaped and aerodynamically protected in the upper front part of the third and third volumes. fourth, benefiting the Cx and especially that the mirrors do not increase the total width of the car, which makes it easier to park, while in the central area there are two luggage racks or luggage compartments with capacity for two airplane cabin suitcases, each (approximately 100 Lx2). In the rear areas the fairing, the passage and the suspension of two rear wheels are established and above and on each side two fuel tanks connected by communicating vessels or not as preferred.

On the other hand, an axis is hinged on the most backward beam torsion bar and stabilizer bar functions, where the two arms of the rear suspension are fixed.

The two lateral volumes also longitudinal, third and fourth, incorporate around it a bumper based on a plastic or similar material for elastic absorption of small lateral or frontal impacts.

In stronger shock absorptions, it is the volumes of the order of 250 mm thick that absorb said impact, permanently deforming.

As for the second volume (interior) it is for the engine / transmission assembly, it is made up of two panels that are screwed in the most advanced area of the base of the main volume, approximately 220 mm, in which they are housed and protected the radiator, the differential, and gearshift, the direction, as well as the transmission from the engine. The central part of this second volume widens to about

400 mm approximately. Here the motorization is fixed to the two transverse beams, or in the electric cars the batteries, or the tank of compressed air if this motorization is used. In the rear part a luggage carrier is enabled, in the resulting space according to the engine, etc.

These last two areas of the second volume are preferably trapezoidal, to facilitate access and to increase below the space for motorization.

The second volume, has a width smaller than the width of the main volume, being defined on both sides of it and between both volumes two small aisles are laid to enter and exit astride, and place the legs of the occupant behind.

Above these two aisles, a removable false floor is preferably established, which rests on the beams, defining a chamber between the bottom of the chassis and this false floor, which stiffens the chassis, insulates the cabin from noise and temperature, and also decreases the height of the second volume with respect to the new base, without impairing its capacity, facilitating the maneuvers of entry and exit to the cabin or main volume, defining in said chamber a space to house one or more exhaust pipes, which can be isolated and soundproofed even more.

As for the engine, it can be materialized with an internal combustion engine, electric, hybrid or compressed air etc, thus being able to take advantage of the cheapest or ecological energy according to the country or the client's desire. In the back of this volume there is another space that is used to establish a luggage rack.

Access to said second volume for the engine / transmission assembly is carried out from a cover or hood, accessible from the main volume or passenger compartment of the vehicle, with the particularity that on said cover are established and / or shaped two seats for the two occupants of the vehicle.

For its part, the front seat incorporates a backrest hinged, unlockable by a lateral and manual drive ratchet, which allows you to tip it back to exit or raise it after entering a single easy and fast movement. The seats are preferably fixed, that is, it is not necessary to adjust them in height or longitudinally, in order that the pilot's seat is located well with respect to the central pillars of the chassis, which will be padded inside, allowing the driver to rest on them, what confers an extra stability for the driver before the centrifugal forces that are generated in the curves. These pillars are defined in turn as roll bars that improve passive safety. Inside these pillars they carry two extenders or desgravitators of the weight of the door, they can also be two linear motors to open or close it comfortably.

In order to adapt the chassis to the different sizes of the drivers, it is provided that the brake and accelerator pedals have considerable dimensions, these being elongated and operated according to a longitudinal hinge axis, which allows the user's foot to be supported in different longitudinal positions depending on its size, without said position negatively affecting the pedal operation, since this, as just said, is lowered in accordance with a longitudinal axis. These pedals are defined on two false floors or inclined skates, (which allow under them the transmissions and the steering links as well as the hinges mentioned above), which give perfect ergonomics to drivers of any height.

However and optionally, the pedals could be adjustable longitudinally by means of the corresponding mechanisms guided and regulated manually or electrically and that are conventional in some current cars.

The steering wheel can also present means of positional regulation, as is conventional in other vehicles.

According to another of the features of the invention, within the main volume or interior and at the top of the sides of this volume and at the height of the base of the hood, two longitudinal stringers are defined on each side and at two heights. armrest functions, and also serve as elements of stiffening and extra protection to the cabin, structured to present programmed deformations, as progressive as possible, but not entrapping, before any type and direction of impact.

As for the rear access to the passenger compartment of the vehicle, it is carried out through a two-leaf rear door and preferably two hinges, a rear or rear one in which the backrest and the headrest of the rear seat, which is supported, are integrated in the back of the first and second volume so that before an impact from behind, it does not get into the occupants. The other upper leaf is hinged transversely in the hood and partially affects the roof of said passenger compartment, in which the driver's headrest is optionally integrated and which allows to open it without moving the rear leaf back, so that it does not sweep this space.

Additionally, it is provided that a passenger compartment for the vehicle's spare wheel is defined at the vehicle door itself, or, alternatively, a rear window. Similarly, on the front or front area of the chassis, an object carrier or trunk of approximately 90 L is defined, with capacity for a medium suitcase.

Finally, it should be noted that, on the rear end of the second volume (for the motorization of the vehicle), an object carrier accessible from outside the passenger compartment is defined through the corresponding door. Its capacity depends on the type and size of the motorization and can also be deformed to absorb rear impacts.

The chassis has been conceived to allow the incorporation of all types of conventional equipment used in the automotive sector, both for comfort, as for passive safety, as well as for active safety as well as control devices or systems, typical of any other car, even the high-end ones.

The special provision of access to the vehicle, from a rear door, instead of through side doors, allows the vehicle to park in a transverse arrangement to the parking space very close to the side vehicles without limiting or obstructing the exit or the access to it, doing it directly to the sidewalk, thus limiting the risk and the obstruction of the traffic. From this structuring, it is possible to obtain an extremely safe vehicle, conceived mainly to circulate in the city and short distances, although due to its great load capacity and comfort, it also allows long journeys to be made with it. Thanks also to its low mass, it needs and wastes little energy in accelerations or slowdowns, which translates into reduced energy consumption.

Its small penetration surface and its good aerodynamic profile add to said energy or fuel savings and as a consequence of emissions, fulfilling the maxim that "The cheapest and least polluting energy is not the one that saves, but the one that does not it is necessary".

The reduced weight of the chassis causes it to generate very little kinetic energy, which in case of impact, is absorbed first, with an elastic perimeter bumper and then allows long permanent permanent deformations that produce relative low decelerations, subsequently avoiding entrapment since exhausted the spaces, before entrapment, the four beams or hugs support end up absorbing the impact rigidly.

Additionally, it should be noted that its small size can almost double the flow of traffic and multiply by 10 or 30 the opportunity to find enough parking for it, compared to a current average car, being able to park three cars like the one of the invention in the space that is necessary to park an average conventional vehicle, which significantly reduces the time needed to park and move in cities congested by traffic. In garage it does not occupy another place, being able to park in the same place transversely, with an average car. Otherwise there are 4 or 3 vehicles per seat. You can park backwards or forwards in a single maneuver and in only 1.4 / 1.5 meters between cars parked in line. Finally, it is worth mentioning that, given the special arrangement of the driver and the symmetry of the vehicle, the chassis of the invention is indistinctly valid for use both in countries where the traffic regulations require driving on the left lane, such as in those countries in which it circulates on the right, without assuming any decrease in the pilot's driving capacity, providing an additional advantage to the functionality and assuming a lower manufacturing cost when it is manufactured worldwide, in series Longer DESCRIPTION OF THE DRAWINGS

To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, a set of drawings is attached as an integral part of said description. In an illustrative and non-limiting manner, the following has been represented:

Figure 1 shows a schematic cross-sectional view of a vehicle obtained from the two-seater vehicle chassis object of the present invention, in which the different longitudinal "volumes" that participate in it can be seen.

Figure 2.- Shows a front frontal elevation view of the vehicle of the invention (in this case, the grid that is on the hood of Figure 2 is only decorative).

Figures 3A and 3B.- Show paths or variants of the vehicle of the invention in a rear rear elevation with window or carrier spare wheel.

Figure 4.- Shows a view similar to that of Figure 2, but in which the vehicle appears with the front hood open.

Figure 5.- Shows a view similar to that of Figure 3B, but in which the vehicle appears with the spare wheel door open. Figure 6.- Shows a profile view or side elevation of the vehicle of the previous figures.

Figure 7 shows a view similar to that of Figure 6, but in which the side luggage carrier appears with its door open.

Figures 8a and 8 b.- They show similar views to that of Figure 6, but in which the vehicle appears with its double-leaf and double-hinged door open, or only with the rear leaf open to exit in case of emergency, if the roof sheet is locked.

Figure 9 shows a view similar to that of Figure 3A and 3B, but in which the vehicle appears with the access door inside open. Figure 10.- It shows a detail in partial perspective, of the block that constitutes the second volume of the monitoring, on which the seats of the vehicle are arranged, being able to be seen as the backrest and head of the previous seat is foldable on the rear seat for facilitate access to it. Figure 11.- Shows, finally, a planar detail of the longitudinally sectioned chassis. The following is a list of the elements that are referenced in the previously described figures.

(VI) .- Main or interior volume.

(V2) .- Second volume.

(V3) .- Third volume.

(V4) .- Fourth volume.

(1) - Entrance halls, (in false floor).

(2) · - Camera.

(3) - Exhaust pipe.

(4-4 '), Transverse beams.

(5-5 '), Ribs.

(6), First sub-volume of volume 3 and 4.

(7) · - Front wheel.

(8), Mudguard.

(9) - Front lights.

(10) .- Fairing of the rearview mirrors.

(11) .- Rearview mirrors.

(12) .- Intermediate sub-volume of volume 3 and 4.

(13) .- Luggage carrier

(14) .- Side bonnet.

(15) .- Third sub-volume of volume 3 and 4.

(16) .- Rear wheel.

(17), Deposit.

(17 '), Filler mouth. (18) .- Rear lights.

(19) .- Perimeter bumpers.

(20-20 ') .- Fixed panels.

(21) .- Engine cover or hood, batteries or compressed air tank. (21 ') .- Fixed base of volume 2.

(22-22 ') .- Front and rear seats.

(23) .- V2 object holder.

(24) .- Front backrest lying or raised.

(24 ') .- Ratchet lever.

(25-25 ') .- Longitudinal stringers.

(26) .- Door.

(27-28) .- Roof and rear door leaves.

(29-29 ') .- Headrest, optional on roof or front backrest. (30-30 ') .- Backrest and headboard.

(31) .- Spare wheel cabin or rear window.

(32) .- Spare wheel.

(33) .- Front trunk and hood (with optional aesthetic only rack).

(34) .- Central pillars, supports shoulders and roll.

(35-35 ') .- Roller skates or slaps.

(36-36 ') .- Elongated pedals.

(37-37 ') .- Front and emergency door hinges.

(38) .- Ventilation grill.

(39) .- Radiator.

(40) .- Gear shift differential.

(41) .- Steering rack.

(42) .- Extensors or desgravitators of the door.

(43) .- Palanquetas to support the extenders.

(44) .- Steering column.

(45) .- Flyer. PREFERRED EMBODIMENT OF THE INVENTION

As can be seen in the aforementioned figures, and in particular of figure 1, a main volume (VI) is used in the chassis of the invention, intended for the container compartment of the two seats of the vehicle, arranged in line, this volume presenting a elongated configuration, with subsequent access, it being provided that another second volume is defined inferiorly and internally for the engine / transmission assembly (V2), also arranged longitudinally, while laterally to the volume (VI) or interior assembly they have and fix two other lateral volumes (V3 and V4) equally longitudinal that frame the main or interior volume, thus defining a safety cell for the occupants.

When the motorization is located inferiorly, in the center of the second volume (V2), in the case of a frontal impact, the same when moving backwards would not invade the main cabin, resulting in an extremely safe arrangement.

The second volume (V2) is fixed centered and on the basis of the volume (VI), defining a first zone for the radiator, differential and direction, a second zone for monitoring or batteries, and a third zone in function of luggage rack, of which will be discussed later.

This in turn allows a very low center of gravity to be obtained, which provides greater stability to the vehicle and also results in a totally central engine, so that the distribution of the weights on the two axes becomes balanced. As can be seen in figure 6, on the bottom of the chassis two transverse beams (4-4 ') are established that divide the chassis into three similar parts, so that, on the most backward beam (4'), You can optionally hinge an axle that also acts as a torsion bar, and a stabilizer bar where the rear suspension arms are attached.

Obviously, the chassis of the invention can use other forms of classical suspension without affecting the essence of the invention.

On both sides of the fixed part of (V2) and between the interiors of (VI) and on the transverse beams (4-4 ') false floors (1) or entrance corridors are established, defining between the bottom of the chassis and these aisles a chamber (2), which stiffens the chassis, insulates the cabin from noise and temperature, and decreases the height of the volume (V2) with respect to the new floor of the volume (VI) without impairing the capacity of (V2) and facilitating the maneuvers of entry and exit to the cabin or main volume (VI), said chamber defining a space to house one or more exhaust pipes (3), which can be isolated and further soundproofed.

Of the commented beams (4-4 ') that protrude from the first volume (VI), they emerge upwards and two ribs (5-5') are fixed to it that subdivide the lateral volumes (V3 and V4) in turn into three sub-volumes, and which stiffen the chassis so that it does not fold in the case of lateral collision, since the ceiling is somewhat weakened by the door opening, in its upper leaf (27).

The first sub-volume (6) above, has the function of housing the passage of the wheel (7), the fender (8) of said wheel, the front lights (9) and the fairing (10) of the rearview mirrors (11) that are housed therein, so that they do not protrude side of the car.

The intermediate sub-volume (12) includes a luggage rack (13), of the order of 100L. approximately, accessible through the corresponding door or side hood (14). The third and subsequent sub-volume (15) integrates the passage and suspension of the corresponding rear wheel (16), while superiorly each sub-volume incorporates the corresponding tank (17), optionally communicated with each other by communicating vessels, incorporating the rear area of said sub-volume the corresponding set of rear lights (18).

Finally, both lateral volumes are complemented with elastic perimetral bumpers (19), to absorb the lateral and frontal or rear impacts of the four frontal corners.

The special configuration of these lateral volumes (V3 and V4) in longitudinal arrangement make the vehicle present an additional lateral volume to that of the passenger compartment that is capable of deforming before an impact to absorb the kinetic energy of the collision, the passenger compartment or main volume remaining (VI) practically unchanged, and thus transferring to its occupants only a small fraction of the kinetic energy that is produced before an axial impact.

Regarding the fixing of volumes (V3 and V4) to the volume (VI), this can be done permanently, by welding, rivets or any other conventional means, or by means of tomilleria or other means that allow them to be decoupled, for repair, and / or replacement, etc.

In the latter case, these elements become easily replaceable parts that, in the event of an impact, limit the damage to the volume (1) and reduce the cost of repair or replacement of all these volumes.

These volumes (V3) and (V4) are preferably fixed and embedded at the right height and all around, some bumpers (19) of elastic absorption, which in turn serve to improve resistance to any type of impact of the set .

On the central front, the perimetral bumpers (19) are fixed on a frame that joins the two sides of the first volume (VI) by assembling them, in addition to having the function of absorbing the central impacts. As for the inner faces of these volumes, they share a surface with the outer face of the volume (VI), without increasing, neither the weights, nor the costs, nor the total width.

These volumes (V3) and (V4) are subdivided into three similar parts through the aforementioned ribs (5-5 ") which in turn stiffen the volume (VI) and the whole assembly externally.

As for the volume for the engine / transmission assembly (V2), its base is fixed on the bottom and centered inside the main volume (VI) also adopting a longitudinal arrangement, so that the first first third of said volume is formed by two panels (20-20 ') that make a narrowing, and which are fixed at the base of the main volume (VI) in the The radiator, differential and gearshift and steering rack, and transmission from the central engine are housed and protected. The central third of this volume serves to accommodate the engines in the case of internal combustion, or batteries or compressed air, in the case of being electric, hybrid or instead if it is by air, it has a cover or hood ( 21) on which the driver and passenger seats (22-22 ') are arranged.

In this interior volume (V2), in the case of an electric or hybrid car the mentioned batteries can be accommodated and the motor can go to the differential (38) or directly to the two front or rear wheels.

The seats are fixed, that is, they cannot be adjusted longitudinally, in order that the driver's seat is properly positioned with the central pillars (34) of the chassis, which will be internally padded, allowing the driver to rest with his shoulders on them, what confers an extra stability for the driver before the centrifugal forces that are generated in the curves, all this without losing the lateral visibility, nor the ergonomics of the driver, in any own position.

These pillars are in turn anti-roll elements or bars that improve safety, and the housing of the door extenders (42) or graders, which are anchored in the levers (43) carried by the upper leaf of the door ( 27). The absence preferably of longitudinal adjustment means for the seats makes their structure simplified, with the consequent cost savings that entails and not having to take more undesirable height for stability and aerodynamics, as well as the lower weight.

Thus, in order to adapt the chassis to the different sizes of the drivers, it is provided that the brake and accelerator pedals (36, 36 ') have considerable dimensions, being elongated and driven in accordance with a longitudinal hinge axis, which allows the user's foot to be supported in different longitudinal positions depending on their size, without said position negatively affecting the pedal operation, since this, as just said, is lowered in accordance with a longitudinal axis below the rammers or skates inclined (35, 35 ').

However, and optionally, the pedals (36, 36 ') could be of adjustable position by means of the corresponding guided mechanisms as in other models of sports vehicles existing in the market.

The steering wheel can also present means of positional regulation, as is conventional in other vehicles. As it can not be otherwise, the pedals (36, 36 ') are arranged inside the volume (VI) and externally to the volume (V2), for which said volume suffers a narrowing in the area close to these elements, although previously it widens again to receive the classic radiator, in the vehicles that this is necessary. The special arrangement of the pedals (36-36 ') arranged on the skates (35-35') means that the impact of the chassis nose becomes deformed without entrapment, taking advantage of the space defined under the deformations Pedals / skates can be occupied by the deformed mass of the chassis.

The last third corresponds to an object holder (23), also accessible through its corresponding door, which acts as a limit stop for the door (28) of the chassis, preventing the passenger compartment from invading an impact.

As for the backrest (24) of the seat (22) of the pilot or driver, it is hinged, so that by means of a ratchet (24 ') manually operable from the side it can be released and folded back, leaving the backrest lying on that position to allow him to enter and exit above him comfortably.

In this way, once the driver has accessed his seat, simply by raising the backrest, it will automatically lock in the ergonomic position to drive.

For their part, the seat belts will preferably be five-point or harness, fixed to both central pillars, thus increasing passive safety, so that the special way of accessing the vehicle allows the pilot's seat belt to be fastened indefinitely, since as mentioned, the seat is accessed from behind, by folding its backrest. According to another of the characteristics of the invention, it is provided that longitudinal stringers (25-25 ') are arranged within the main volume, and also define on both sides two armrests for the main volume (VI), these are they extend along and at two heights of said volume, the two occupants can also use them. These stringers also act as stiffening elements of the chassis giving extra protection to the passenger compartment by absorbing the impacts by means of programmed deformations, first of the chassis taking advantage of the weakness of the chassis for the buffers of the front suspension and in the lateral volumes in the steps of It rolls and then and before the deformations become enticing, the beams are responsible for absorbing impacts even by stiffening to avoid lateral and longitudinal entrapments. This special configuration for the chassis means that the main volume is not weakened by lateral cuts as in the case of vehicles that have side access doors, raising the safety of the vehicle, as well as its structural rigidity. In the same way, since it does not have side doors, the special configuration means that it is not necessary to reinforce or regress different parts of the chassis, which translates into a saving of weight to the same materials and consequently of less cost. Experimentally it has been possible to verify that the chassis can absorb kinetic energy with permanent frontal deformations of up to 750mm, laterals of the order of 250mm and later of the order of 450mm without the area provided for the positioning of the occupants of the vehicle in the main cabin be affected, avoiding catching occupants

Although the exterior design of the chassis can vary according to different aesthetic lines, the special configuration provided for it allows to obtain very good aerodynamic friction coefficients, thus reducing the consumption of the vehicle, since in addition its aerodynamic penetration surface is very little.

Finally, and with regard to the rear access door (26) to the vehicle, as can be seen in Figure 8, it is embodied in a double-leaf rear door (27-28) (at 90 ° approximately) and preferably double hinge, the rear sheet (28) that supports the backrest (30) and the headrest (30 ') of the rear seat and a top (27) that is part of the roof of said cabin, in which the head restraint (29) of the driver is optionally integrated, although said head restraint can also be integrated into the backrest (29 ') of the driver.

As can be seen in figures 3 A and 3B, it is provided that a passenger compartment (31) for the spare wheel (32) of the vehicle is defined at the vehicle door itself or a rear moon can be in place .

Additionally, and in accordance with Figure 4, on the anterior area of the chassis, in correspondence with the front face thereof, a luggage compartment (33) is defined, which also serves to join the two sides of the volume (VI) and assemble the set.

Although the data presented below are not intended Being limiting, but merely illustrative of the characteristics that can be obtained with the chassis of the invention, experimentally it has been possible to obtain a prototype with the following technical characteristics, which obviously can be redesigned within variable ranges:

Measurements:

• Length: 2200mm

• Width: 1300mm

• Height: 1600mm

Weight: 450 kg (according to construction and motorization materials.)

Luggage volume: 350 1. (in four independent luggage compartments.) Any type of motorization.

Any type of material on the market can be used for its construction, whether they are formed by stamping, injection or on a single-sided mold, as appropriate to optimize each vehicle or part.

Claims

1. - Chassis for a two-seater vehicle, which incorporates an engine of any type, whether internal combustion, electric, hybrid, compressed air, or any other conventional engine, is characterized because a main volume is defined in it and centered on it. (VI), intended for the passenger compartment of the two occupants of the vehicle, arranged in tandem, a volume that has a longitudinal configuration, with access from the rear, having foreseen that below and inside it another longitudinal volume is defined for the engine/transmission assembly (V2), and on it and in its central part the two seats are formed or placed in tandem, with the particularity that attached to the volume (VI) or passenger compartment, two other lateral volumes (V3) are arranged on each side. and V4) also longitudinal that cover or integrate other elements and protect this main volume or cabin, increasing its safety and the total useful volume, without more exterior volume.

2. - Chassis for a two-seater vehicle, according to claim 1, characterized in that below the main volume (VI) two transverse beams (4-4') are defined that divide the chassis transversely into three similar parts, from whose ends they emerge upwards and are They fix to it two ribs (5-5') that subdivide the lateral volumes into three and that stiffen the chassis, so that in the first third of both lateral volumes the wheel (7) and the fender (8) are covered. the front wheels, and the front lights (9) and the fairing of both rear-view mirrors (11) are established, while in the central area two luggage racks (13) are established, having foreseen that the fairing will be established in the rear area, of the passage and suspension of respective rear wheels (16) and respective fuel tanks (17), with one or two filler necks (17'), optionally joined by communicating vessels, as well as the set of rear lights (18).

3.- Chassis for a two-seater vehicle, according to claim 2, characterized in that an axle acting as a torsion bar is hinged on the rearmost beam (4'), which in turn acts as a stabilizer bar, where the suspension arms are fixed. rear with separate shock absorbers.

4.- Chassis for a two-seater vehicle, according to claims 1 and 2, characterized in that the chassis is capable of incorporating any type of conventional running gear and suspension, attached or fixed to the lateral ends of the (VI)

5.- Chassis for a two-seater vehicle, according to claim 1, characterized in that the longitudinal lateral volumes (V3 and V4) incorporate a bumper (19) around them based on a plastic or elastic material.

6.- Chassis for a two-seater vehicle, according to claim 1, characterized in that the volume for the engine/transmission assembly or second volume (V2) is made up of two panels (20 and 20') that are fixed in the front and below of the volume. (VI) in a narrowed area, where the radiator, the differential and gear shift and the steering rack are housed and protected, as well as the transmission from the central engine, established between the two transverse beams and within a fixed base ( 2Γ), so that said volume (V2) has a width less than the width of the main volume (VI), defining spaces on the sides of it for the legs of the occupants, having provided that said volume for the engine/transmission assembly is accessed above an upper cover or hood (21), accessible from the main volume or passenger compartment of the vehicle, with the particularity that the seats are established on said cover (21). (22-22') for the two occupants of the vehicle, having foreseen that this cover or hood is attached to a fixed base (21')

7.- Chassis for a two-seater vehicle, according to claim 1, characterized in that the front seat (22) incorporates a backrest (24) hinged and unlockable by means of a ratchet that is operated laterally (24'), to be able to tip it backwards, having foreseen that said backrest is complemented by a headrest (29-29'), associated with said backrest or established on the ceiling.

8.- Chassis for a two-seater vehicle, according to claim 1, characterized in that the driver's seat belt can be a harness or five-point, fixed to both central pillars (34).

9. - Chassis for a two-seater vehicle, according to claim 1, characterized in that on both sides and within the main volume (VI) or passenger compartment, two longitudinal beams (25-25') are defined at two heights as armrests, and that They are also elements of extra stiffening and protection for the passenger compartment, structured to present an initially progressive deformation, and subsequently rigid but not trapping, in the event of a possible impact of any type and direction.

10. - Chassis for a two-seater vehicle, according to claim 1, characterized in that rear access to the passenger compartment of the vehicle is carried out through a double-hinged rear door (26) (37-37'), preferably with two leaves, a rear one (28) and an upper one (27) that forms part of the roof of said cabin, in which the headrest (29) of the driver of the vehicle is optionally integrated, as well as in the rear leaf the backrest (30) and headboard (30') of the passenger, having foreseen that the perimeter bumper (19) of the rear central part is fixed to the leaf (28) and to the lower outer part.

11. - Chassis for a two-seater vehicle, according to claim 1, characterized in that the central pillars (34) house extenders or degravitators (42) equipped with means to leverage the door upwards in order to cancel its weight and facilitate opening or closing it. .

12. - Chassis for a two-seater vehicle, according to claims 1, characterized in that the leaf (28) of the vehicle itself defines a compartment (31) for the spare wheel of the vehicle or a rear window or window, failing that.

13. - Chassis for a two-seater vehicle, according to claim 1, characterized in that on the front area of the chassis, in correspondence with the front face thereof, a trunk (33) is defined, which also serves to separate and assemble the two sides of the (33). VI) and the set.

14. - Chassis for a two-seater vehicle, according to claim 1, characterized in that at the rear end of the volume (V2) for the motorization of the vehicle, an object holder (23) accessible from the outside of the passenger compartment is defined, with a resulting size inversely proportional to the size of the motorization, or batteries, or compressed air tank.

15.- Chassis for a two-seater vehicle, according to claim 1, characterized in that the volumes (V3 and V4) are fixed to the volume (VI), permanently or by means of practicable means thanks to which said volumes (V3) and (V4) are constituted as replaceable parts.

16.- Chassis for a two-seater vehicle, according to claim 1, characterized in that a false floor (1) is established on the transverse beams (4-4'), between the fixed parts of (V2) and the interior parts of (VI), defining between the bottom of the chassis and this false floor (1) a chamber (2), which serves to stiffen the chassis, insulate noise and temperature to the passenger compartment, in which a space is defined to house one or more exhaust pipes (3 ).

17.- Chassis for a two-seater vehicle, according to claim 1, characterized in that the seats (22, 22') lack longitudinal adjustment means, having provided that the driver's seat is properly positioned with the central pillars (34) of the chassis, preferably padded inside.

18. - Chassis for a two-seater vehicle, according to claim 1, characterized in that externally associated with the second volume (V2) it incorporates elongated brake and accelerator pedals (36, 36') and actuated according to a longitudinal hinge axis below and to the side. other side of each of the two inclined skids (35, 35') and where they are located.

19. - Chassis for a two-seater vehicle, according to claim 18, characterized in that optionally, the elongated pedals (36, 36') incorporate longitudinal adjustment means.

20.- Chassis for a two-seater vehicle, according to claim 1, characterized in that the steering wheel includes positional adjustment means.

21.- Chassis for a two-seater vehicle, according to claim 1, characterized in that the rearview mirrors (11) are integrated into the volumes (V3 and V4) and protected by fairings (10) that are the aerodynamic projection upwards and backwards of the fronts of said volumes.

22.- Chassis for a two-seater vehicle, according to claim \, characterized in that the volume for the engine/transmission assembly (V2) and its base is fixed centrally on the bottom inside the main volume (1) adopting a longitudinal arrangement, so that the first anterior third of said volume is made up of two panels (20-20') that undergo a narrowing, and that are fixed at the base of the main volume (VI) in which the radiator (39) is housed and protected, the differential and gear change (40) and the steering rack (41), as well as the transmission from the central engine, with provision being made for the central third to house the internal combustion engine, or failing that, the batteries or air compressed, having a lid or hood (21) on which the driver and passenger seats (22-22') are arranged, as well as the driver's backrest (24).

23.- Chassis for a two-seater vehicle, according to claim 1, characterized in that on the front of the volume (VI) and on a frame that joins its two sides, the central front part of the perimeter bumper (19) is fixed or embedded to it, and in a window made above it, the ventilation grill (38) is placed in the event that it is necessary.