Vehicle arrangement comprising a tank, a shock-absorbing crossmember, and a central column capable of fixing a tow hook.

Abstract

Arrangement for a vehicle comprising a tank, a shock-absorbing crossmember, and a central column capable of fixing a tow hook. The invention relates to an arrangement (2) for a vehicle comprising a tank (3) intended to store an energy fluid, the tank (3) comprising a rigid structure intended to form a part of a structure of a base (8) of such a vehicle, the tank (3) comprising a rear face (3R) extending along a vertical and transverse plane, a first element (11) of the shock-absorbing crossmember type extending transversely and being arranged behind the tank (3), a second element (20) of the central column type extending longitudinally between the rear face (3R) of the tank (3) and the crossmember (11), the central column (20) being substantially centered relative to a median plane of such a vehicle and comprising a main fixing means intended for fixing a tow hook.Figure for abstract: Figure 2.

Description

Title of the invention: Arrangement for a vehicle comprising a tank, a shock-absorbing crossmember, and a central column capable of fixing a towing hook. Technical field of the invention

[0001] The invention relates to an arrangement for a vehicle comprising a tank, a shock-absorbing crossmember and a central column for attaching a tow hook. The invention also relates to a vehicle comprising such an arrangement. The invention also relates to a method of assembling such an arrangement. State of the prior art

[0002] A vehicle, in particular a motor vehicle, can generally be equipped with a hitch so as to be able to tow, for example, a trailer, a caravan, a van or even to receive a bicycle rack. Such a hitch is complex to install on the vehicle. Indeed, the assembly of the hitch generally requires the dismantling of a rear shield or bumper, possibly an exhaust line and / or at least one wheel arch, and / or various elements so as to allow the lateral reinforcements of such a hitch to be fixed on side members of such a vehicle. In addition, modifications to certain original elements are necessary, for example a cutting of such a rear bumper for the passage of the hitch through it.

[0003] Thus, installing a towbar is long, tedious and therefore requires the intervention of a professional after-sales service for the vehicle. As a result, this installation is also expensive.

[0004] Furthermore, once the hitch is installed on the vehicle, a substantial part of such a hitch remains fixed to the vehicle even if the ball of such a hitch is removed between two uses of the hitch. Indeed, lateral reinforcements and a cross member generally remain fixed to the chassis of such a vehicle, which makes the vehicle heavier. For example, the vehicle has an increased mass of approximately twenty kilograms.

[0005] Such a situation is not optimal since it results in excess fuel consumption and consequently an increase in CO2 production, and, particularly in the case of an electric vehicle, a reduction in the autonomy of such a vehicle. Presentation of the invention

[0006] The aim of the invention is to provide an arrangement which overcomes the above drawbacks.

[0007] More specifically, an object of the invention is to propose an arrangement allowing simple and rapid assembly, as well as simple and rapid disassembly, of a towing hook directly at the level of a shock-absorbing crossmember so as to to avoid the step of fixing a hitch to the side members of a chassis of such a vehicle after-sales. Summary of the invention

[0008] To achieve this objective, the invention relates to an arrangement for a vehicle comprising: - a tank intended to store an energy fluid, the tank comprising a rigid structure intended to form part of a structure of an underbody of such a vehicle, the tank comprising a rear face extending along a vertical and transverse or substantially vertical and transverse plane, - a first shock-absorbing cross-member type element extending transversely and being arranged behind the tank, - a second central column-type element extending longitudinally between the rear face of the tank and the cross member, the central column being substantially centered relative to a median plane of such a vehicle, and comprising a main fixing means intended for fixing a towing hook.

[0009] The fixing means may comprise a thread provided in the central column, in particular a thread having an axis extending longitudinally.

[0010] The fixing means may comprise a centering bore provided within the central column, in particular a centering bore having an axis which coincides or substantially coincides with the axis of the tapping.

[0011] The arrangement may further comprise a tow hook, the tow hook may comprise a cylindrical portion centerable relative to the centering bore and a threaded portion cooperating with the tapping.

[0012] The tow hook may comprise a main body and a holding means for holding the main body in position relative to the shock absorbing cross member.

[0013] The holding means may comprise a right arm pivotably mountable at a first end of the right arm relative to the main body and a left arm pivotably mountable at a first end of the left arm relative to the main body.

[0014] The right arm may be attached to the shock absorbing crossmember at a second end of the right arm and the left arm may be attached to the shock absorbing crossmember at a second end of the left arm.

[0015] The shock absorbing crosspiece may comprise a right bore and a left bore, the second end of the right arm being able to be fixed at the right bore, in particular by a screw-nut system, and the second end of the left arm being able to be fixed at the left bore, in particular by a screw-nut system.

[0016] The right arm and the left arm may be curved and / or bent between their first end and their respective second end, in particular by presenting a right angle or substantially a right angle.

[0017] The arrangement may comprise a left-hand side member extending longitudinally from the tank, in particular from the rear face of the tank, to the shock-absorbing crossmember and a right-hand side member extending longitudinally from the tank, in particular from the rear face of the tank, to the shock-absorbing crossmember.

[0018] The tank may be obtained from composite materials and may comprise through holes, in particular in the longitudinal and / or transverse and / or vertical direction, the through holes being able to allow the central column to be fixed, possibly by means of a base extending substantially in a vertical and transverse plane, the base then being able to be fixed to a rear face of the tank extending substantially in the same plane.

[0019] The invention also relates to a vehicle, in particular a motor vehicle, comprising an arrangement as defined above.

[0020] The invention also relates to a method of assembling an arrangement as defined above, the method comprising a step of providing: - a body part for a vehicle, the body part comprising a tank, a shock-absorbing cross member and a central column, the central column comprising a fixing means for a towing hook, the fixing means comprising a thread, - a towing hook comprising a threaded part, followed by a step of fixing the tow hook by screwing the threaded part of the tow hook into the thread of the fixing means, possibly using the right and left arms as lever arms to facilitate screwing, the right and left arms then being pivoted so as not to interfere with the shock absorbing cross member during screwing. Presentation of figures

[0021] These objects, characteristics and advantages of the present invention will be explained in detail in the following description of a particular embodiment made without limitation in relation to the attached figures among which:

[0022] [Fig.l] is a schematic side view of a motor vehicle according to one embodiment of the invention.

[0023] [Fig.2] is a perspective view of an arrangement according to one embodiment of the invention.

[0024] [Fig. 3] is a bottom view in section along a transverse and longitudinal plane passing through the axis of a fixing thread of a towing hook of the arrangement according to the embodiment of the invention.

[0025] [Fig.4] is a detailed sectional view, along a vertical and longitudinal median plane M of the vehicle, of the arrangement according to the embodiment of the invention.

[0026] [Fig.5] is a perspective view of the arrangement according to the embodiment of the invention.

[0027] [Fig.6] is a perspective view of the arrangement according to the embodiment of the invention, a ball-type towing hook being mounted.

[0028] [Fig.7] is a sectional view along the median plane M of the arrangement according to the embodiment of the invention, a swan neck type towing hook being mounted.

[0029] [Fig.8] is a perspective view of the arrangement according to the embodiment of the invention, the swan neck type tow hook being mounted.

[0030] [Fig.9] is a perspective view of the arrangement according to the embodiment of the invention, a towing ring being mounted in place of a towing hook. Detailed description

[0031] The direction in which a vehicle, in particular a motor vehicle, moves in a straight line is defined as the longitudinal direction X. By convention, the direction perpendicular to the longitudinal direction, located in a plane parallel to the ground, is called the transverse direction Y. The third direction, perpendicular to the other two, is called the vertical direction Z. Thus, a direct XYZ reference frame is used in which X is the longitudinal direction in the front-rear direction of the vehicle, therefore directed towards the rear, Y is the transverse direction directed towards the right and Z is the vertical direction directed upwards. The forward direction corresponds to the direction in which the vehicle usually moves in the longitudinal direction and is opposite to the rear direction.

[0032] As illustrated in [Fig.l], a vehicle 1, preferably a motor vehicle, or an arrangement 2, comprises a tank 3 according to one embodiment of the invention. The tank 3 is intended to contain an energy fluid, that is to say a fluid forming a reserve of energy convertible into a force capable of moving the vehicle. The tank 3 is therefore a component of the vehicle 1 which gives it a certain autonomy. The tank comprises in particular an inlet opening for filling the tank with an energy fluid and an outlet opening for delivering and then consuming the energy fluid contained in the tank.

[0033] According to a preferred embodiment, the tank 3 is intended to store hydrogen or more precisely dihydrogen. The vehicle 1 then comprises preferably a fuel cell 5 capable of transforming hydrogen into an electric current and an electric motor 6 powered by an electric current from the fuel cell 5. The vehicle 1 may also comprise an electrochemical battery 7, for example of the lithium-ion type. The electrochemical battery 7 may be recharged by an electric current from the fuel cell 5 and / or by a connection to an electricity distribution network. The electric motor 6 may also be powered by an electric current from the electrochemical battery 7. The tank 3 associated with the fuel cell 5 may thus act as a range extender for the vehicle, when the electrochemical battery 7 is discharged.

[0034] Alternatively, the architecture of the vehicle 1 could be different. The vehicle 1 could not include an electrochemical battery, so that the tank 3 constitutes the sole energy source of the vehicle 1. According to another variant, the vehicle could include an internal combustion engine powered by hydrogen instead of a fuel cell. According to other variants, the tank 3 could be configured to store other forms of energy gases, for example liquefied petroleum gas or natural gas. The tank 3 could even be intended to store a liquid fuel such as gasoline, diesel or even ethanol.

[0035] The tank 3 is advantageously intended to store an energetic fluid under pressure, that is to say at a pressure strictly higher than atmospheric pressure. In this case, the tank 3 is intended to store the energetic fluid, in particular hydrogen, at a pressure greater than or equal to 700 bars. Alternatively, the tank 3 could be intended to store the energetic fluid at a different pressure, for example a pressure greater than or equal to 300 bars, or 500 bars, or 1000 bars, or any other value. The tank 3 thus comprises a rigid structure capable of withstanding the forces exerted by the pressurized fluid that it contains, that is to say centrifugal forces acting from inside the tank 3 and which tend to cause it to burst. In addition, the tank may have a capacity greater than or equal to 50 liters, preferably greater than or equal to 100 liters, or even greater than or equal to 150 liters.The structure of the tank is also capable of withstanding significant impacts, in particular impacts occurring in the event of an accident of the vehicle 1, without generating any leakage of the energy fluid to the outside. Accident data and / or simulations and / or crash tests make it possible to dimension the structure, in particular the required wall thicknesses, so that no leakage of energy fluid occurs, even for the most violent accidents. As illustrated in [Fig. 2], the tank 3 typically comprises a generally parallelepiped shape. In this example, it comprises three pairs of opposing walls. A first pair of opposing walls is composed of a front wall (not illustrated) and a rear wall 3R. The front and rear walls extend substantially parallel. to the Y and Z axes. A second pair of opposing walls is composed of a left side wall and a right side wall extending substantially parallel to the X and Z axes. A third pair of opposing walls is composed of an upper wall and a lower wall extending substantially parallel to the X and Y axes. Alternatively (not shown), any other shape of the tank could be envisaged. Advantageously, the tank 3 is arranged in the rear part of the vehicle. Above all, the tank 3 forms a rear part of a chassis 8 of the vehicle 1, for example a rear part of the underbody of the vehicle.

[0036] The tank 3 referred to in the invention is typically a polymorphic structural tank made of composite materials using a weaving process similar to that presented in document FR 2888915Al. This tank comprises internal reinforcement wells which pass through the interior volume of the tank and which connect two by two of the opposite walls of the tank 3 so as to secure them together. This structure and this geometry ensure mechanical support of the tank suitable for receiving high-pressure gases, in particular for containing hydrogen. The tank being rigid, it is therefore used as a structural element of the vehicle, in addition to the conventional structural elements of the underbody of the vehicle.

[0037] The tank 3 comprises through holes 3H, for example holes 3H extending in several directions, for example in the longitudinal direction and / or in the transverse direction and / or in the vertical direction. Advantageously, each hole 3H comprises an insert, for example a tube-shaped insert, preferably metallic, so as to stiffen the structure of the tank 3 by passing right through the tank, preferably by joining two walls of the same pair of opposite walls. Preferably, as illustrated in [Fig.2], the vehicle 1, or the chassis 8, comprises a base 60 extending substantially in a vertical and transverse plane. Preferably, the base 60 is fixed to the rear face or wall 3R of the tank 3. Preferably, the fixing of the base 60 is ensured by fixing means passing through holes 3H extending in the longitudinal direction.Note that the 3H through holes are only shown schematically in [Fig.2] so as not to overload the other figures.

[0038] The arrangement 2 comprises a shock-absorbing crossmember 11. The crossmember 11 is preferably fixed via structural elements to the tank 3. Preferably, as illustrated in Figures 2, 3, 5, 6, 7, 8 and 9, the crossmember 11 is arranged behind the tank 3. The shock-absorbing crossmember 11 is preferably of the beam type made of steel and / or aluminum alloy. The crossmember 11 extends transversely or substantially transversely, for example forming a slight curve, the concave side of the curve being oriented towards the front of the vehicle so as to maximize the absorption of energy during an impact coming from the rear. Thus, preferably, the crossmember 11 is arranged within a rear bumper 9 of the vehicle 1 illustrated schematically in [Fig.l]. Preferably, damping elements, for example in the form of a honeycomb, extend within the internal volume of the bumper, that is to say between the crossmember 11 and the shell of the bumper. Indeed, preferably, the bumper is of the hollow shell type. For example, the assembly comprising the crossmember 11, the damping elements (not illustrated) and the rear bumper 9 constitutes a shock-absorbing device 10 for impacts coming from the rear or substantially from the rear, for example rear side impacts.

[0039] Preferably, as illustrated in [Fig.2] in particular, the arrangement 2 further comprises a left spar 4L, that is to say a piece of spar, a short spar, extending longitudinally from the tank 3 and a right spar 4R, that is to say a piece of spar, a short spar, extending longitudinally from the tank 3. Each spar 4L, 4R extends to the shock-absorbing crossmember 11 and is fixed to the crossmember 11. Preferably, each spar 4L, 4R extends from the rear face 3R of the tank to the crossmember 11, for example by being fixed to the base 60, the base 60 being fixed to the tank 3 as seen previously. For example, each spar is a hollow body and the section of each spar in a vertical and transverse plane is square or rectangular.

[0040] The arrangement 2 further comprises a central column 20. The central column 20, for example of the beam piece or beam type, extends longitudinally while being substantially centered relative to a median plane M of the vehicle 1 illustrated in FIGS. 3 and 5. For example, the beam 20 is a hollow body and the section of the beam 20 in a vertical and transverse plane is square or rectangular. The central column 20 comprises a fixing means 21 for a towing hook 30 which will be detailed later in particular with reference to [Fig.4].

[0041] Preferably, as illustrated in particular in Figures 5 and 6, the vehicle 1, or the chassis or the underbody 8 of the vehicle 1, or the arrangement 2, or the rear bumper 9, comprises a reinforcement 50. The reinforcement 50 preferably extends mainly in a transverse and longitudinal plane, possibly forming a curve, substantially close to that formed by the crossmember 11 for example. Advantageously, the reinforcement 50 comprises an extension 51 extending vertically or substantially vertically upwards. For example, the reinforcement 50 is obtained from the same material as the side members and the column, for example from aluminum alloy and / or steel. Preferably, the reinforcement 50 is fixed to each side member 4R, 4L and to the central column 20. Preferably, the fixing to these three elements of the chassis 8 is ensured by welding.

[0042] Preferably, the reinforcement 50 is fixed respectively to a front part of each Ion- geronnet 4R, 4L and to a front part of the central column 20. In this case, as illustrated in particular in [Fig.5], each longitudinal member 4R, 4L is in two separate parts and comprises respectively a front part 40R, 40L and a rear part 41R, 4IL. The central column 20 is then also in two parts and comprises a front part 25 and a rear part 26. Advantageously, as illustrated in [Fig.6], the front part 25 of the central column 20 comprises a front plate 27, or junction plate, and the rear part 26 of the central column 20 comprises a rear plate 28, or junction plate. Preferably, each plate 27; 28 extends substantially in a vertical and transverse plane.More preferably, each plate 27; 28 is drilled so as to allow them to be fixed relative to each other by at least one bolt, or a plate is provided with at least one added nut or at least one added threaded rod so as to allow the fixing of one with the other by screwing. Thus, the front part 25 of the column 20 and the rear part 26 of the column 20 are fixed to each other in a removable manner. Preferably, the transverse reinforcement 50 is fixed, for example by welding, only on the front part 25 of the central column 20.

[0043] In this case, each front part 40R, 40L and each rear part 41R, 41L, respectively of each longitudinal member 4R, 4L comprises a junction 42R, 42L of the same type, that is to say via plates or plates, preferably bolted together, so as to allow the fixing of each rear part 41R, 41L to each front part 40R, 40L of each longitudinal member 4R, 4L. Preferably, the transverse reinforcement 50 is fixed, for example by welding, only on each front part 40R, 40L of each longitudinal member 4R, 4L, as illustrated in [Fig. 5], or at the level of each front part 40R, 40L in the case of an element and / or part inserted between the reinforcement 50 and the respective front part 40R, 40L. Thus, each spar is preferably in two parts and the central column is also in two parts which can be removed from each other.

[0044] Advantageously, the through holes 3H of the tank 3 are used for fixing the central column 20 on the, relative to the, tank, at least for fixing the base 60 fixed to the tank 3 as mentioned previously. In this case, the central column 20 is fixed to the base 60. More precisely, the first part or front part 25 of the column 20 is fixed to the base 60, preferably by welding. In other words, in this case, the front part 25 of the column 20 is for example part of the base 60.

[0045] Preferably, as illustrated in particular in [Fig. 4], the fixing means 21 comprises a thread 22 provided in the central post 20. For example, the thread 22 is provided in the front part 25 of the post. For example, the thread 22 is provided in the front plate 27. For this purpose, the front plate 27 comprises a forward extension, for example extending within the section hollow of the front part 25. Preferably, the tapping 22 has an axis A22 extending longitudinally or substantially longitudinally. For example, the fixing means 21 further comprises a centering bore 23 formed within the central column 20. For example, the centering bore 23 is formed in the rear part 26 of the central column 20. For example, the centering bore 23 is formed in the rear plate 28 of the column. For this purpose, the rear plate 28 comprises a rearward extension, for example extending within the hollow section of the rear part 26. Preferably, the centering bore 23 has an axis A23 merged or substantially merged with the axis A22 of the tapping 22. Thus, for example, it is the front and rear plates 27, 28 which comprise the fixing means 21 for a towing hook 30. For example, the centering bore 23 extends over a length L23 of between 20 mm and 200 mm.For example, the length L32 of a threaded portion 32 of the hook 30 extends from 20 mm to 60 mm. In this configuration, the diameter of the centering bore 23 is greater than the diameter of the threaded portion 32, the threaded portion 32 passing through the centering bore 23 before its insertion into the tapping 22. For example, the diameter of the threaded portion 32 is between 20 mm and 30 mm. For example, the thread length is between 20 mm and 40 mm.

[0046] Alternatively, the thread is provided in the rear part of the column, for example in the rear plate. For example, in this case, the centering bore is provided in the front part, for example in the front plate. In this configuration, not shown, the diameter of the centering bore is smaller than the diameter of the threaded part.

[0047] Preferably, the arrangement 2 further comprises a towing hook 30. The towing hook 30 comprises a cylindrical part 33 intended to be centered relative to, in, the centering bore 23. The towing hook further comprises the threaded part 32 cooperating with the tapping 22. More preferably, as illustrated in [Fig. 2] in particular, the towing hook 30 comprises a main body 38 and a holding means 31 for holding the main body 38 in position relative to the shock-absorbing crossmember 11. The hook 30 may further comprise a “ball” 39, for example fixed to the main body 38 by means of two bolts. Preferably, the main body 38 comprises the threaded part 32 and the cylindrical part 33.

[0048] More specifically, the holding means 31 comprises a right arm 31R. As illustrated in [Fig. 6], the right arm 31R comprises a first end 36R. The right arm 31R is pivotally mounted at the first end 36R of the right arm 31R relative to the main body 38. The holding means 31 further comprises a left arm 3 IL. The left arm 3 IL comprises a first end 36L. The arm left 3 IL is pivotally mounted at the first end 36L of the left arm 3 IL relative to the main body 38. Preferably, each pivot 35 between an arm and the main body 38 is non-removable, for example obtained in particular with a rivet inserted with play on the arm and / or on the main body. The right arm 31R comprises a second end 37R. The right arm 31R is fixed to the shock-absorbing crosspiece 11 at the second end 37R of the right arm 31R. The left arm 3 IL comprises a second end 37L. The left arm 3 IL is fixed to the shock-absorbing crosspiece 11 at the second end 37L of the left arm 3 IL. To do this, preferably, the shock-absorbing crosspiece 11 comprises a right bore 1 IR and a left bore 1 IL, as illustrated in [Fig.2]. Thus, the second end 37R of the right arm 31R is fixed at the level of the right drilling 1 IR, for example by a screw-nut system, for example of the bolt type.The second end 37L of the left arm 3 IL is fixed at the level of the left drilling 1 IL of the crosspiece, for example by a screw-nut system, for example of the bolt type.

[0049] As illustrated in Figures 2, 6 and 8, the right arm 31R and the left arm 31L are curved and / or folded between their first end 36R; 36L and their respective second end 37R; 37L. Advantageously, this curve, or this fold, presents, creates a right angle, or substantially a right angle to each arm. Generally, each arm thus has an L shape, for example a flat L extending in a transverse and longitudinal plane once fixed on the crosspiece 11.

[0050] As illustrated in Figures 3, 4 and 7, the arrangement 2, at least the central column 20, comprises a deflection means 29 in the event of an impact coming from the rear of the vehicle and causing the towing hook 30, or a towing ring 70 fixed to the fixing means 21 to move forward if necessary. Preferably, this deflection means 29 is a V, for example having a substantially vertically extending angle iron shape, a junction 291 between the two wings of the angle iron being substantially centered relative to the median plane M of the vehicle. Preferably, the junction or the bottom of the V extends vertically. For example, the angle iron is fixed within the column 20, for example by being welded to the front part 25 of the column, for example via spot welds. As illustrated in [Fig.3], the wings of the angle iron then extend towards the front of the vehicle so that in the event of an impact causing the threaded part 32 and the cylindrical part 33 to move forward, the threaded part 32 is deflected to the right or left by sliding against one of the two wings of the angle iron. Advantageously, the end of the threaded part 32 of the hook is rounded and / or conical so as to facilitate the change of direction (to the right or to the left) when in contact with the junction 291 between the two wings of the angle iron where appropriate.

[0051] Alternatively, the junction of the angle iron can extend transversely so as to direct the thread of the hook downwards or upwards in the event of an impact.

[0052] Alternatively, a simple sheet metal arranged vertically within the central column, for example oriented at 45 degrees relative to the median plane M of the vehicle, necessarily deflects the hook to one side only, that is to say to the right or to the left, in the event of an impact before the towing hook 30. Alternatively, the sheet metal extends so as to rise towards the rear in order to direct the hook downwards in the event of a rear impact, or the sheet metal extends so as to descend towards the rear in order to direct the hook upwards in the event of a rear impact. In any event, the objective is to prevent the threaded part 32 and / or the cylindrical part 33 from damaging the tank 3 by striking it in the event of a violent rear impact, although the structure of the tank is particularly rigid.

[0053] A mode of execution of a method of assembling the arrangement will now be described in particular with reference to figures 6, 7 and 8.

[0054] The method of assembling the arrangement 2 comprises a step of providing a body part 100 for a vehicle 1.

[0055] More precisely, the body part 100 comprises the tank 3. The body part 100 also comprises the shock-absorbing crossmember 11. The body part 100 also comprises the central column 20 comprising the fixing means 21 for the towing hook 30. As a reminder, the fixing means 21 comprises at least the tapping 22.

[0056] The providing step also comprises providing the towing hook 30. The towing hook 30, in particular its main body 38, comprises the threaded portion 32.

[0057] Then, a step of fixing the towing hook 30 is carried out by screwing the threaded part or screw 32 of the towing hook 30 into the tapping 22 of the fixing means 21 (see [Fig. 4] in particular). In the case of a towing hook provided with the holding means 31, in particular comprising the right arm 31R and the left arm 31L, each arm respectively comprises the first end 36R, 36L pivotally mounted relative to the main body 38 of the hook 30 as illustrated in [Fig. 6]. Note that in Figures 6, 7 and 8, the hook 30 is illustrated a first time on the right, separated from the body part 100, before fixing to the body part 100, and a second time fixed to the column after or at the end of screwing.By virtue of their pivot mounting, each arm can be deployed so as to extend radially, or substantially radially, relative to at least one of the two axes A22, A23, in particular so that the second ends 37R, 37L extend far from the axes A22, A23. In this configuration where the two arms 31R, 3IL extend substantially radially relative to the axes A22, A23, the two arms offer substantial lever arms to facilitate the screwing of the threaded portion 32 of the hook 30 into the tapping 22 of the central column. Note that the screwing around the axis A22 of the threaded portion, or screw, 32 of the hook 30 into the tapping 22 of the fixing means 21 is . illustrated by a curved arrow V in figures 6, 7 and 8. Note that in figures 6 and 7, the hook illustrated on the left requires a half turn of screwing, or unscrewing, to be in the correct position and allow the arms to be fixed.

[0058] Thus, where appropriate, at least one of the two arms, or even both arms 31R, 3 IL, is used to screw the hook, more precisely its threaded part 32 into the tapping 22 of the central column 20. Obviously, the right and left arms 31R, 3 IL are pivoted so as to create lever arms and do away with any tool or key, without interfering with the shock-absorbing crosspiece 11 during screwing. Once the screwing has been carried out over a substantial stroke, the arms are screwed or unscrewed so that the arms are arranged so that the axis of each pivot 35 extends substantially vertically, and so that the hook is oriented upwards as illustrated in figures 1, 2, 3, 5 and 8. All that remains is to fix, preferably via bolts, the second ends 37R, 37L of the arms 31R, 3 IL relative to the crosspiece 11, via the holes 1 IR, 1 IL provided in the latter.It should be noted that the cooperation of the cylindrical part 33 of the hook with the bore 23 facilitates the screwing of the screw 32 into the tapping 22. Preferably, a clearance is provided between the cylinder 33 and the bore 23 so as not to hinder the screwing of the screw 32 into the column.

[0059] Preferably, the play at the bottom of the centering bore is taken up by means of a play take-up means in order to allow tightening of the hook without play within the screw 32 / tapping 22 pair. In addition, the play take-up means makes it possible to make the threaded part 32 coincide angularly with the tapping so that the arms are correctly positioned opposite the crosspiece 11, which facilitates fixing between the arms and the crosspiece. For example, at least one washer, for example elastic and preferably trapped in a groove, is arranged at a shoulder 34 of the towing hook (see [Fig.4]) between the cylindrical part 33 and the threaded part 32. Alternatively, or in addition, at least one washer, for example elastic and preferably trapped in a groove, is arranged at a shoulder 24 formed between the tapping 22 and the centering bore 23. The washer(s) thus trapped in grooves cannot be lost by the user..

[0060] For disassembly, the procedure is reversed. Thus, the arms 31R, 3 IL are disassembled from the cross member 11. Thanks to the pivot mounting of the arms relative to the main body 38, the arms are oriented according to the needs and the space available. The threaded part 32 is then unscrewed relative to the tapping 22, for example by using the arms as lever arms. After unscrewing, the entire tow hook is extracted and stored until the next use. Optionally, if necessary, a cover is placed within the hole made in the bumper 9 for the insertion of the hook in order to obtain a neat finish of the bumper.

[0061] As illustrated in [Fig.9], in the absence of a tow hook fixed at the level of the column 20, it is possible to take advantage of the fixing means 21, at least of the thread 22, to fix a towing ring 70. Advantageously, a play-compensating means can be provided so as to avoid play at the thread between the screw of the ring 70 and the thread 22. Thanks to this possibility offered by the means of fixing the towing hook, it is possible to do without having a lateral anchorage (on the left and / or on the right) for a towing ring and, where appropriate, a cover covering an orifice of the bumper opposite such a lateral anchorage. In addition, the central anchorage offered by the presence of the means of fixing the central column facilitates and secures the towing of a vehicle.Indeed, a central anchor is then easier to use than a lateral anchor, in particular when the front lateral anchor of the vehicle to be towed is on the opposite side to that of the towing vehicle, the tow bar extending substantially at 45 degrees in a substantially transverse and longitudinal plane. Such towing reduces the distance between the two vehicles, which is not recommended in terms of road holding and / or safety. Thus, the solution avoids such an inconvenience when towing.

[0062] Optionally, although the central column allows the towing ring 70 to be fixed, at least one lateral fixing for towing is retained, for example in the case of utility vehicles, more exposed to getting stuck in the sand, getting bogged down or even for vehicles whose aesthetics are of less importance.

[0063] In summary, the solution relates to the fixing of a hitch directly on the chassis or underbody 8 of a vehicle in the manner of a towing ring, that is to say via a simple screwing. Indeed, the chassis, via the tank and an entire rear structure including the cross member 11 and the central column 26 ensures the fixing of the specific tow hook. The solution is suitable for a vehicle having a rigid rear structure, in particular a structure reinforced by the integration in this rear structure of the tank 3, in particular high pressure, which is structural with respect to the chassis due to its robustness. Indeed, the presence of the tank 3 integrated into the chassis 8 stiffens the rear structure of the vehicle. Thus, it becomes possible to add the central column or longitudinal member 20, at the level of the median plane of the vehicle so as to offer an extremely fast-assembly hitch.Note that the centering 23 associated with the cylindrical part 33 of the hook also provides greater robustness and helps to make the hook integral with the rear structure.

[0064] Indeed, thanks to the solution, as seen previously, the assembly of the hitch is reduced to the assembly of the hitch hook 30. For the assembly of the hook, there is no need to dismantle the rear part of the vehicle comprising a shield and holding tabs, shock blocks for example of the honeycomb type, plugs on side members, supports for an exhaust line or even plastics under the trunk and wheel arches, which is long and tedious. Indeed, thanks to the solution, the towbar does not include lateral reinforcements to be mounted on the side members. Thus, there is no need to fix elements under the vehicle. There is therefore no need to fix large bolts that require large tools under the vehicle. Finally, no modification to the vehicle, such as for example cutting the bumper, is necessary for the hook to pass through. This eliminates the need for intervention in a garage and therefore the cost of such an intervention.

[0065] Thus, the rigidity provided by the tank 3 is used to add the central column fixed directly, preferably indirectly, to the tank 3. Indeed, as seen previously, for example the column is fixed for example to the base 60 itself fixed directly to the tank 3. Preferably, a thin sheet or protection is provided between the base 60 and the tank 3. Indeed, the base 60 is for example made of steel or aluminum alloy while the tank 3 is made of composite materials which generates different vibration frequencies. Such a protective sheet aims to act as a screen between the two to prevent wear of the external surface of the tank and / or the surface of the base 60 by friction resulting from the differences in vibration frequencies.

[0066] Thus, whereas a hitch of the state of the art remains permanently on the vehicle once mounted, the solution allows the hook to be removed easily, without tools, in order to store it outside the vehicle. The solution therefore makes it possible to lighten the hitch since it only comprises the hitch hook 30 preferably comprising the holding means 31. Thus, the mass of the hitch is greatly reduced, which lowers the fuel consumption of the vehicle thus equipped and consequently lowers its CO2 production and / or increases its autonomy in the case of an electric vehicle in particular.

[0067] Thus, the structure of the vehicle chassis comprises the extremely rigid high-pressure tank 3 which extends over the entire width in the transverse direction of the chassis, the front portions 40R, 40L of the side rails extending from the tank and preferably replacing side rails. The structure comprises the front portion 25 of the central rail 20. As a reminder, the three rails 40R, 40L, 25 (front portion of the column) are structural and mounted directly on the tank 3, or via the base or interface 60. Preferably, the vehicle body is welded to these sheet metal elements in addition to the sheet metal floor for example. At the rear end, that is to say at the level of the rear portions 41R, 41L, 26, the cross member 11 for impacts extends transversely while being fixed to these elements, preferably by welding.Thus, the three columns or rear parts 41R, 41L, 26 are preferably bolted to the front parts 40R, 40L, 25 which allows rapid disassembly and replacement in the event of a collision only deforming the rear parts of the Ion-. geronnets and cross member 11. Thus, repairs following a minor accident are quick, easy, and inexpensive. In other words, thanks to the solution, the rear part of the 41R, 26, 41L side members are easily interchangeable.

[0068] Furthermore, the three side members / pillars can be fixed with the same center distances in the transverse direction for several types or ranges of vehicle because they are fixed relative to the tank, or even on the tank, and are not the extensions of side members extending in the central part of the vehicle. In the case of using the tank 3 for several models, it is possibly the entire arrangement which can be transposed and used for several vehicles having large differences in terms of underbody.

[0069] As illustrated in [Fig.9], the solution makes it possible to mount a towing ring 70 in place of the tow hook 30, simply by screwing it through the rear shield or bumper 9 as is generally the case for a towing ring. Thus, a user or a breakdown service or emergency personnel can easily install a towing ring, intuitively, for example by unclipping a cap or hood in the rear bumper if the tow hook is not present.

[0070] As a reminder, the solution comprises a screwed assembly in the central beam 20 with a cylindrical bar 33 and a threaded element 32 and at least one arm 31R, 3 IL fixed on the cross member 11, more precisely underneath, allowing in particular the rotational stopping of the hook relative to the column. Note that the arms 31R, 3 IL stiffen the assembly, the fixing between the hook 30 and the chassis. The arms are fixed to the cross member preferably via bolts requiring tools so as to complicate disassembly and prevent easy theft of the towing hook.

[0071] As mentioned previously, the two lower arms, in the shape of an L, are fixed to the main part or main body 38 by non-removable rivet pins, so as to allow the rotation or pivoting of the arms to bring them together, to fold them down, during assembly by screwing the threaded part 32 into the tapping 22 of the column 20, and to open them, to deploy them, during assembly on the crosspiece, in the lower part, by two screws or bolts.

[0072] In summary, the threaded part 32 of the hook 30 is screwed rigidly onto the structure of the vehicle and the two arms 31R, 31L create connection points, preferably distant from each other, for example near the lateral side members 4R, 4L to obtain good stability as well as keeping the ball 39 correctly oriented, that is to say upwards.

[0073] Preferably, the cylindrical bar of the main body 38 comprises the cylindrical part 33 guided and centered in the bore 23 formed in the central column, the central bore being for example a welded internal tube. As mentioned above Previously, a means of deflecting the cylindrical bar of the hook is provided for safety purposes. Thus, in the event of a significant impact on the towing hook 30, a tab or thick sheet 29, for example V-shaped, for example welded into the column 20, directs the hook, towards one side, or in other embodiments not illustrated, upwards or downwards. As a reminder, for this purpose, the front end of the hook, at the level of the front face of the thread 32, is advantageously rounded. This prevents perforation, or at least damage, to the tank 3 preferably intended to store pressurized hydrogen, which is potentially flammable or even explosive.

[0074] Thus, the central part of the bar type, in particular cylindrical, rigid, robust, of the towing hook does not remain perpendicular to a rear face of the tank extending in a transverse and vertical plane during an impact, this bar is forced to become as parallel as possible to the rear face of the tank, so as not to damage it during a crash. Preferably, an opening or orifice, in the shield or bumper 9, for the passage of the cylindrical bar of the hook 30 is similar to that intended for a towing ring 70, that is to say with a cap that can be unclipped and reclipped.

[0075] In conclusion, the user can carry out the installation of the tow hook himself since no major disassembly or assembly is necessary. In addition, the tow hook is also very simple to disassemble, an operation that the user can also do himself if he does not use it for a long period. Given the absence of a large steel cross member and its reinforcing arms on the side members, the rear structure is not modified when the hook is not mounted. In addition, only basic tools, such as wrenches, are useful for the assembly / disassembly of the arms 31R, 3 IL, the screwing / unscrewing of the threaded part in the column being easy, in particular by using the arms as lever arms. The user only needs to remove the two lower screws or bolts on the cross member 11, bend the two arms 31R, 3 IL towards him, and turn to unscrew the threaded part of the tapping to remove the tow hook entirely.Then all you have to do is clip the shield cap back on if necessary.

[0076] Optionally, a single arm 31R; 31L is provided. Indeed, a single arm may be sufficient to hold the threaded part 32 of the hook in position relative to the tapping 22 of the fixing means in the column, in particular in the case of a position holding means comprising for example at least one elastic washer at the shoulder 24, 34.

[0077] Furthermore, although the illustrated embodiment relates to a fixing of the arms by contact of the arms under the crosspiece 11, that is to say at the level of a face of the crosspiece 11 facing the ground, alternatively, the fixing of the arms can be done on the crosspiece, that is to say on a face arranged on the top of the crosspiece. Alternatively again, the arms 31 R, 3IL could be fixed against a face of the crosspiece 11 extending substantially vertically, either at the rear or at the front of the crosspiece 11.

[0078] Note that after dismantling this tow bar, the rear structure becomes entirely original. Thus, the structure is identical to its configuration which allowed the approvals for crashes, unlike the structures of vehicles retaining a tow bar mounted on the side members and having repercussions in terms of safety in the event of a rear impact. Indeed, in the case of a tow bar mounted on the side members and / or cross member of the chassis, this configuration is not tested and is a fortiori not approved.

[0079] As mentioned, no excess mass remains on the vehicle, particularly once the hook is removed. In addition, the removed hook has an extremely small footprint, which makes it easier to store between uses.

[0080] Note that the central column 20, in particular the rear part 26, is connected to the cross member 11, to the transverse reinforcement 50 and / or to the vertical extension 51 of the reinforcement 50 which are themselves fixed directly or indirectly to the longitudinal members 4R, 4L, and finally to the base 60 itself preferably fixed to the tank 3. Thus, this assembly around the column 20 supporting the fixing means 21 of the towing hook 30 is particularly rigid, solid, in particular thanks to all these connections, welded and / or bolted. In addition, this rigidity is increased where appropriate by the arm(s) 31R; 3 IL adding a direct connection between the main body 38 of the hook and the crosspiece 11.

[0081] Note that the solution is compatible with the two types of "ball" or hook generally encountered, namely in two parts with adapter plate and two fixing bolts as illustrated in figures 2, 3, 5 and 6, and the swan neck type illustrated in figures 7 and 8.

[0082] As a reminder, the means for attaching the towing hook can be used to mount the towing ring 70 in order to avoid a second opening in the shield and a second clip-on closing cap. In addition, the design of the rear bumper is improved since a single centered opening or cutout, and therefore a single cap centered in the middle of the shield, is sufficient for the two separate functions.

[0083] In a variant of the embodiment not illustrated, more side members are arranged at the rear, for example four in number, including two side members on either side of the median plane M and close to this plane M. In this case, the towing hook comprises a cross member on which the ball is fixed, for example by welding. The hook, more precisely the cross member of the hook, is then fixed to the two cylindrical bars extending longitudinally, each bar being screwed inside each side member arranged on either side and close to the median plane M. Optionally, the hook comprises the two L-shaped arms.

[0084] The invention is particularly suitable for a vehicle, in particular an automobile, and can be used for truck, bus, coach, agricultural machinery, lifting machinery and any other machinery with a structural and rigid rear tank.

Claims

Claims

1. Arrangement (2) for a vehicle (1) comprising: - a tank (3) intended to store an energy fluid, the tank (3) comprising a rigid structure intended to form a part of a structure of a base (8) of such a vehicle (1), the tank (3) comprising a rear face (3R) extending along a vertical and transverse or substantially vertical and transverse plane, - a first element (11) of the shock-absorbing crossmember type extending transversely and being arranged behind the tank (3), - a second element (20) of the central column type extending longitudinally between the rear face (3R) of the tank (3) and the crossmember (11), the central column (20) being substantially centered relative to a median plane (M) of such a vehicle (1), and comprising a main fixing means (21) intended for fixing a towing hook (30).

2. Arrangement (2) according to the preceding claim, characterized in that the fixing means (21) comprises a thread (22) formed in the central column (20), in particular a thread (22) having an axis (A22) extending longitudinally.

3. Arrangement (2) according to the preceding claim, characterized in that the fixing means (21) comprises a centering bore (23) formed within the central column (20), in particular a centering bore (23) having an axis (A23) merged or substantially merged with the axis (A22) of the tapping (22).

4. Arrangement (2) according to the preceding claim, characterized in that the arrangement (2) further comprises a towing hook (30), the towing hook (30) comprising a cylindrical part (33) centering relative to the centering bore (23) and a threaded part (32) cooperating with the tapping (22).

5. Arrangement (2) according to the preceding claim, characterized in that the towing hook (30) comprises a main body (38) and a holding means (31) for holding the main body (38) in position relative to the shock-absorbing crossmember (11).

6. Arrangement (2) according to the preceding claim, characterized in that the holding means (31) comprises a right arm (31 R) pivotally mounted at a first end (36R) of the right arm (31R) relative to the main body (38) and a left arm (3 IL) pivotally mounted at a first end (36L) of the left arm (3IL) by report to the main body (38).

7. Arrangement (2) according to the preceding claim, characterized in that the right arm (31R) is fixed to the shock absorbing cross member (11) at a second end (37R) of the right arm (31R) and in that the left arm (31L) is fixed to the shock absorbing cross member (11) at a second end (37L) of the left arm (3IL).

8. Arrangement (2) according to the preceding claim, characterized in that the shock-absorbing crosspiece (11) comprises a right bore (1 IR) and a left bore (1 IL), the second end (37R) of the right arm (31R) being fixed at the right bore (1 IR), in particular by a screw-nut system, and the second end (37L) of the left arm (3 IL) being fixed at the left bore (1 IL), in particular by a screw-nut system.

9. Arrangement (2) according to the preceding claim, characterized in that the right arm (31R) and the left arm (3 IL) are curved and / or folded between their respective first end (36R; 36L) and their respective second end (37R; 37L), in particular by presenting a right angle or substantially a right angle.

10. Arrangement (2) according to one of the preceding claims, characterized in that the arrangement (2) comprises a left-hand side member (4L) extending longitudinally from the tank (3), in particular from the rear face (3R) of the tank, to the shock-absorbing cross member (11) and a right-hand side member (4R) extending longitudinally from the tank (3), in particular from the rear face (3R) of the tank, to the shock-absorbing cross member (11).

11. Arrangement (2) according to one of the preceding claims, characterized in that the tank (3) is obtained from composite materials and comprises through holes (3H), in particular in the longitudinal and / or transverse and / or vertical direction, the through holes (3H) allowing the central column (20) to be fixed, possibly by means of a base (60) extending substantially in a vertical and transverse plane, the base (60) then being fixed to a rear face (3R) of the tank extending substantially in the same plane.

12. Vehicle (1), in particular a motor vehicle, characterized in that it comprises an arrangement (2) according to one of the preceding claims.

13. Method of assembling an arrangement (2) according to one of claims 6 to 9, characterized in that it comprises a step of providing: - a body part (100) for a vehicle (1), the body part (100) comprising a tank (3), a shock-absorbing crossmember (11) and a central column (20), the central column (20) comprising a fixing means (21) for a towing hook (30), the fixing means (21) comprising a threaded hole (22), - a towing hook (30) comprising a threaded part (32), followed by a step of fixing the towing hook (30) by screwing the threaded part (32) of the towing hook (30) into the threaded hole (22) of the fixing means (21), possibly using the right and left arms (31R, 31L) as lever arms to facilitate screwing, the right and left arms (31R, 31L) then being pivoted so as not to interfere with the shock-absorbing crossmember shocks (11) during screwing.

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