FR2537080A1 - CARRIER STRUCTURE FOR A MOTOR VEHICLE - Google Patents

Abstract

THE OBJECT OF THE INVENTION IS A SUPPORTING STRUCTURE FOR A MOTOR VEHICLE, COMPOSED OF SEVERAL PARTS CONNECTED TO BETWEEN THEM IN GRID FORMATION. ACCORDING TO THE INVENTION, EACH OF THESE PARTS IS CONSTITUTED OF A CLOSED TUBE WITH A APPROPRIATE LONGITUDINAL SHAPE. IT IS, FOR EXAMPLE, CONSTITUTED BY A FIRST GROUP OF PARTS FORMING THE BASE CHASSIS 2 OF THE SAID STRUCTURE AND BY A SECOND GROUP OF PARTS FORMING A RETICULATED CAGE 3 IN THE SHAPE OF AN INVERTED CUP, CONNECTED TO AUDIT CHASSIS 2.

Description

Carrier structure for motor vehicles The present invention relates to

a supporting structure

  for a motor vehicle, comprising a number of parts

  these joined together to form a grid structure.

  Crosslinked load-bearing structures are already known composed of caissons in stamped and welded sheet metal.

  already known structure, each element is essential-

  consisting of two derri-plates pressed or formed at the

  each sheet having straight edges placed at

  covered and welded on the corresponding edges of the

  The various elements are then connected to one another by means of special seals (T-joints, interlocking seals, etc.).

  in order to constitute a reticular supporting structure

both the desired shape.

  Because of the specific form of the different

  ments, this kind of structure already known presents a certain

  number of disadvantages related in particular to the type of procedure

  required, which requires a considerable number of presses and, especially, dies for the realization of the half-envelopes In addition, it is necessary to provide a large workforce on metallurgical workstations during the assembly of the a large number of elements used Problems also appear when applying the protective paint on the reticular structure due to the existence of reentries formed along the welded edges and which are difficult to cover. even

  joints, the latter preventing the paint from reaching

inside the structure.

  The object of the present invention is to provide a carrier structure for a motor vehicle which, compared to the known bearing structures, is light while ensuring a high degree of rigidity, strength and shock absorption, etc., and which is easier and more economical to manufacture Another objective of this

  The invention consists in providing a resistive carrier structure

  both to atmospheric agents, in particular to corrosion

  and on which one can mount easily and securely

  necessary elements to complete the cash register and the

  mechanical assemblies on the engine.

  In relation to these objectives, the present invention

  a load-bearing structure for a motor vehicle,

  of a number of interconnected elements to form a grid structure, characterized in that each of these elements is composed of a closed tube having

an appropriate longitudinal plot.

  The invention will now be described, in a non

  by way of an example illustrated by the

  anxious showing a view from above, in perspective and partially

  exploded of a carrier structure corresponding to the present invention. In this drawing, the numeral 1 indicates a

  complete support structure for a motor vehicle, corresponding to

  of the present invention, and composed of a base frame (2) surmounted by a reticular cage (3> which, in the present example, has a front compartment <4> for

  receive the engine, a median compartment (5) intended to form

  sea passenger compartment, and a rear compartment (6)

  which may, for example, be used as a baggage compartment

  ge. If we carefully examine the base frame (2), we can see that it consists essentially of a pair

  reticular and rectangular structures (8,9), the structure

  the rear ture is slightly higher than the

front structure.

  The structure 8 is composed of two parallel lateral members 3 '(11, 12); at the end connected to the structure 9, each of these members has two sections for effecting the connection between the structure 8 and the structure 9, the latter being slightly raised At the opposite ends belonging to the structure 8, distinguishes two transverse tubular members (13, 14), each being connected to the ends of the lateral members 11 and 12 so as to form two extensions (13a, 13b and 14a, 14b)

  outwards, on each side of the lateral limbs

  11 and 12 Approximately in the middle of these members 11 and 12 there are two other extensions directed outwards on each side and marked by the numbers 15 and 16. Finally, in the area formed by the lateral members 11 and 12 12 and by the transverse members 13 and 14, the rectangular structure 8 has two other tubular sections (17, 18) arranged

  in the shape of a cross along the diagonals of the

  8 and connected to the transverse tubular limbs.

res 13 and 14.

  Moreover, the rectangular tubular structure 9

  has two straight tubular lateral limbs (19, 20)

  placed parallel to one another and connected with the help of two mem-

  tubular crossbars (21, 22), the spotted member 22

  being located the most outside.

  With regard to the structure of the cage (3) placed above, according to the present invention, it is seen that it consists essentially of a pair of tubular sections

  (25, 26>, each of them starting from the

  motor (4) to reach the baggage compartment (6)

  thus forming, at the top, the passenger compartment

  (5) Sections 25 and 26 are connected by several tubular transverse members (27,28,29,30,31,32 and 33) to each profiled tubular section (25,26) is connected

  one end of three amounts (35,36,37 and 38,39,40 respectively

  each of these amounts being related, at the level of

  the opposite end, to the tubular lateral members, to

see respectively 41 and 42.

  Each of these members 41 and 42 serves to reinforce the structure 1 and to connect the cage 3 to the extensions 13a, 14a,

  and 13b, 14b and 16 on the basic chassis 2 If one examines

  mine more carefully the amounts mentioned above,

  can see that the amount 35 is composed of a tubular section

  connected at its lower end to the end of the tubular section 41 and at its upper end to the section 25 forming the side of the opening of the windshield An intermediate point on the upright 35 is also

  connected, via the tubular crosspiece

  47, at another point of the tubular section 25, at the curve in the engine compartment, near the transverse member 28 The same applies to the upright 38, the crosspiece bearing in this case the figure 48. The amounts 36 and 39 are essentially straight, while the amounts 37 and 40 have several curves

  and in particular a curved lower section (50, 51) in form

  bow, at the back of the structure, intended to receive

the rear wings -

  From the rear transverse limb (33) located on

  the luggage compartment (6), two tubular extensions in-

  curvées (52, 53) move downwards to make a connection with the opposite ends of the transverse member 22

on the chassis 2.

  The engine compartment 4 is essentially formed by a parallelepipedic reticular structure, whose

  upper sides consist of one end of the

  tubular 25 and 26 and transverse members

  27 and 28 The lower edges of the parallelepiped structure

  are composed of a transverse member before

  (56) and a connected rear transverse member (57)

  between them respectively by lateral tubular limbs

  58 and 59 At its ends, the transverse member 57 is connected to the uprights 35 and 38 below the

  connection of crosspieces 47 and 48 already mentioned

  In addition, the transverse limb before 56 is

  tied to the transverse member 27 by means of two sections

  tubulars (61, 62) fixed close to the ends of the mem-

  transverse member 27 which are connected, as already indicated, to the ends of sections 25 and 26. The numeral 63 refers to through-holes provided on each of the tubular sections mentioned above; the function of these holes is to allow the protective paint to penetrate to

  the interior of each of these sections.

  Brication used for the preparation and assembly of the component parts of the carrier structure 1 is extremely simple. The starting material is a closed tubular section that is found on the market at a very affordable price.

  standard type formatting machines equipped with

  appropriate, the different longitudinal pieces are curved

  nally to give them the required shape We then transfer these parts to a metallurgical workstation o,

  with a small number of machines (welders,

  The parts can then be welded or simply assembled by screwing with the aid of a type of fastener.

retaining bolt.

  It is then necessary to foresee the operation of painting and recou-

  for example, to an electrophoretic method; in this case, the paint is evenly distributed over the entire outer surface as well as inside the rooms thanks to

through holes 63.

  The supporting structure is ready to receive the mechanical parts, namely the engine and the transmission, as well as the rest of the parts of the box which are assembled according to

  the system that appears most appropriate to the different cases.

  The description above makes it possible to highlight

  the advantages offered by the supporting structure according to the

  compared to the known systems already mentioned.

  Firstly, the use of a structure composed of tubular sections, instead of welded half-parts, offers additional strength and rigidity and

  a decrease in weight the structure is in a state of resistance

  to any constraint that may be applied to it, particularly in terms of bending and twisting forces, and these are these; points that are most sought after by the builders in practice The secret of this rigidity and this resistance lies mainly in the closed section of

  each component to the extent that the structure can withstand

  safely to any kind of constraint exerted on the moving vehicle, the parts of the body which are connected to it have the sole function of envelopae and

  protect the space inside.

253708 Q

  beautifully the size and section of each piece, we can

  create zones with different degrees of rigidity

  For example, the middle part, receiving the passages, can be made more rigid than the front and rear parts, so that, even in the case of a large impact, the energy can be dispersed by a deformation affecting only

the front and back parts.

  As already mentioned in the passage, the shape of the section

  used to make the different parts makes it possible to

  easily the other pieces of cash on the structure 1.

  In fact, the components have flat surfaces offering

  a firm and wide support surface for the reception of

  my connection between the structure and the parts that

are connected.

  Resistance to atmospheric agents, corro-

  in particular, is much higher than those

  already known, in particular because of the elimination of welding re-entries on composite structures

  two half-envelopes welded on the edge.

  Finally, in view of what has been ex-

  posited, that the carrier structure according to the present invention can be manufactured easily and economically, insofar as the parts involved are simply cut and

  these two operations requiring relatively inexpensive tools.

  which is not the case for the types of structures

already known.

  Experts in the field will understand that it is pos-

  sible to make changes in the tubular sections constituting the structure mentioned above without departing from the scope of the present invention.

  example no limits imposed on the type of tuition section

  bulaire, its section being round or polygonal, with inner and / or outer longitudinal reinforcing ribs. Although, for the material used for each of the

  above mentioned, preference should be given to the

  there is nothing to prevent the use of any other suitable material provided that each of the parts covered by the present invention

  consists of a closed tubular section.

Claims (11)

claims   1 Carrier structure for a motor vehicle, composed   several pieces connected to each other in grill formation.   - characterized by the fact that each of these parts   consists of a closed tube with a longitudinal shape   appropriate. Structure according to claim 1, characterized by   the fact that it consists of a first group of   said forming the base frame (2) of the structure and by a second group of parts forming a reticulated cage (3) in   reverse cup shape, connected to said frame (2).   The structure according to claim 2, wherein said base frame (2) is essentially constituted by a pair of rectangular structures (8, 9) having a common side and substantially arranged on two parallel levels, one of which between them being slightly elevated by report to the other.   The structure according to claim 3, wherein each of said rectangular structures (8, 9) has   side members (11, 12, 19, 20) connected to members   crossbeams (13, 14, 21, 22).   Structure according to claim 3 or 4, according to one of said rectangular structures (8) has a pair of sections inside, arranged in the shape of a cross   (17, 18) and connected to the corners of said structure (8).   Structure according to any one of the claims   previous 2 to 5, wherein said reticular cage (3) is constituted by a pair of tubular sections (25, 26) shaped to delimit the upper edge of said motor vehicle and connected by respective transverse members (27, 28, 29, 30, 31, 32, 33), the said sections   tubular members (25, 26) extending longitudinally from the   extending to the rear of said supporting structure.   The structure according to claim 6, wherein each of said pairs of tubular sections (25, 26) is connected to uprights (35, 36, 37, 38, 39, 40) whose opposite ends are connected to a tubular section.   (41, 42) connected to said base frame (2).   8 Structure according to any one of the claims   in which each of these tubular sections   laires closed communicates with the outside, or dirzeztement   either through through holes (63).   Structure according to any one of the claims   in which each of these tubular sections The wires are connected by welding.   Structure according to any one of the claims   previous 1 to 8, in which adjacent sections are   connected using retaining bolts.   Structure according to any one of the claims   in which each of these tubular sections   has a polygonal section.   Structure according to any one of the claims   preceding 1 to 10, wherein each of said sections   tubular has a round section.   13 Structure according to any one of the claims   preceding, in which each of said closed sections   has internal and / or external longitudinal ribs EXTERIOR.