DE3119666A1 - Load-bearing vehicle body - Google Patents

Abstract

Load-bearing vehicle body consisting of a net-shaped monolithic structure made of laterally closed frames which are connected to one another via crossmembers. <IMAGE>

Description

Load-bearing structure for motor vehicles

The present invention relates to a supporting structure for motor vehicles of the type that a plurality of elements are connected to one another in such a way that they result in a three-dimensional, network-like structure.

The object of this invention is to provide the t inen structure of the Kind of realizing / that there is a greater mechanical load capacity, and with high rigidity and light weight both forces, and at that

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Build up attacking moments of force an effective resistance is opposed, especially in the case of loads due to bending and twisting.

Another object of the invention is to realize a structure in which the at any point, Especially on the front and rear parts, forces acting as evenly as possible over the entire area Distribute structure, and in the gons of different stiffness are present, some of which are in the do not substantially deform, while others are designed to deform strongly in the event of an impact, in order to destroy the greater energy generated by the impact.

Finally, it is still another object of the invention to provide a load-bearing structure with a larger one Realize resistance against external influences, in particular against corrosion, which ättch offers the possibility of that the parts required to complete the body can be easily and safely attached.

These and other objects are achieved ävtrch the load-bearing structure according to the invention t of a central portion with training as a passenger compartment comprises and front and rear portions which protrude from said central portion and are intended to receive elements and mechanical units of the motor vehicle itself, wherein the structure is characterized in that the central part essentially comprises two side parts, each consisting essentially of a closed frame which is provided with a central post and a plurality of supports which are substantially perpendicular to the plane of these side parts and to it the two side parts are intended to be connected to one another.

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According to the invention, which is perpendicular to the longitudinal axis of the Body-measured width of the aforementioned front and rear parts is much smaller than that of the middle part, and each side panel consists of a pair of assembled sheet metal halves, each with a circumferential edge are provided so that they can be placed next to each other and connected to each other.

For a better understanding of the supporting structure for motor vehicles according to the invention , a particular embodiment of its implementation will now be described, by way of example only, with reference to the accompanying drawings in which

Fig.1 is a perspective view of the supporting structure according to the invention; Fig. 2, 3, 4, 5 views of the structure from above, reproduce from the side, from the front and from the back; Figures 6, 7, 8, 9 and 10 show cross-sections of parts of the structure according to the sectional planes VI - VI, VII VII, VIII - VIII, IX - IX and X-X according to Fig.1; Figures 11 and 12 show cross-sections of parts of the superstructure, which each correspond to the sectional planes XI - XI and XII XII according to Figure 3;

Figures 13 and 14 show views of parts of the Aufhaus, which respectively correspond to the directions of arrows XIII and XIV according to Fig.2 and 3;

Figure 15 is a cross-section of part of the structure, which corresponds to the section plane XV - XV according to Fig.J; Figures 16 and 17 are cross-sections of parts of the structure corresponding to the sectional planes XVI - XVI and XVII - XVII according to Figures 2 and 5.

Especially with reference to Fig. 1, the structure according to the invention includes essentially a central part 1, which is intended to form the passenger compartment of the motor vehicle,

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a front part 2 and further .. © in the rear part 3, from the middle part to the front hezw. protrude to the rear and should serve to do so? Eleraente and mechanical To record aggregates of the vehicle,

The middle part 1 in turn comprises a pair of side parts 4, each essentially in the shape of a closed Frame with a MitfcQlpfQSten 5, as well a variety of carriers »? gek @ 5ins @ ichnet through the Numbers 6 to 11, the longitudinal axis of which is essentially perpendicular to the plane of the side parts, and their ends with these are connected »

As can be clearly seen from Figures 1 and 2, the width of the front part 2 and the rear part 3, measured perpendicular to the longitudinal axis of the structure, is significant smaller than that of the middle part 1 "

Each side part essentially comprises a pair of spars, a lower 15 and an upper 16? and a pair of posts, a front 17 and a rear 18? as can be seen clearly from Fig.3? does the front post consist essentially of two parts 17a? 17b _f where the first is essentially s © akrsclit and the second forms a certain angle to the first? while the rear post 18 consists of two parts. 18a and 18b, which are essentially the same length? and both are inclined towards the vertical »

Each side part 4 is made up of shaped sheet metal halves surrounding edges together? which put together and can be connected to each other? whereby the connection of the shaped sheet metal halves takes place - cross-sections of the lower spar 15? of the upper spar 16 and the middle pillar 5 of each side part 4? that through the connection of the aforementioned side part halves are created

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can be seen from Figures 7, 8 and 9; In these cross-sectional drawings, 19 were the opposite circumferential edges of the side part halves, which in any suitable way, for Example by means of a series of welding points 20, can be connected to one another; the cross-sections the spars and posts of each side panel are generally rectangular in shape, although some of the this rectangle-forming side walls are slightly inclined to the cross-sectional axes themselves by means of the usual Technology for the shaping of the shaped sheets to be able to easily produce the two side part halves.

The plane connecting the two parts of each post or spar cross-section can be a median plane of the cross-section themselves, as is the case with spar 15 (Fig.7) or post 5 (Fig.9), or one diagonal plane, as in the case of spar 16 (Figure 8).

On the two side parts 4 three upper supports 6, 7 and 8 (Fig.l) and three lower supports 9, 10, 11 are attached, and a front bracket 12; the ends of each top beam are connected to the top spars 16 of each side member connected, while the ends of each lower beam 9, 10 and 11 are connected to the lower spars 15 are; however, the ends of the front support 12 are connected to the front posts 17 of the side parts, and at the point where the two parts 17,> and 17b of this post meet, as shown in Fig.l and 3 can be clearly seen.

Each carrier consists essentially of a pair of shaped sheet metal halves with a circumferential edge, which are placed against one another and can be connected to one another so as to form the carrier itself; as can be seen from Figure 6,

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in which the cross section of such a carrier (namely the lower carrier 10) can be seen, this has essentially a rectangular shape, which is formed by two support halves with edges 19 laterally opening which are placed against one another and in any suitable manner, for example by means of spot welds 20, are connected to each other. As with the cross-sections of the posts and spars for each side part 4 mentioned, have the aforementioned carriers themselves correspondingly slightly inclined to the cross-sectional axes Sidewalls around the two beam halves that make up each beam using compression molding easy to manufacture.

For the connection of the beams 6 to 11 with the side parts 4, the two ends of these beams, as can be seen from the cross-sectional drawing in Fig. 7, provided with wings 22, which are designed so that they are attached to part of the spar surface or the post surface of the relevant side part 4 to which the carrier itself is to be connected. Appropriately the ends of each beam have gradually widening outward cross-sections, as from the Figures 9 and 10 can be seen in which the respective ends of the beams 10 and 7 are shown; the widening of these cross-sections is shown in the plan view in such a way that a connection zone with essentially circular arc-shaped profile is created, as can be clearly seen from the aforementioned two figures is.

The front «- part 2 of the structure has, as in detail, from Figures 11, 13 and 14 can be seen, the shape of a closed frame comprising a pair of spars 23 and a pair of cross members 24 which are perpendicular to each other

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stand, comprises, wherein the connection of this part with central part 1 via two pairs of arms 25 (Figures 1 and 13) takes place. The two arms of each pair form a V with each other and each protrude at one end of the respective one Holmes 23 out. The free ends of the two arms mentioned are connected to the vertical part 17a of the front post 17 of the side part in question connected so that they together with this part after three sides form a resistant element, which in its entirety is designated by 26. This resistance element therefore represents the connection zone between the front part 2 and the central part 1 of the structure, and is significantly wider than the previous one.

As can be clearly seen from Figures 1, 13 and 14, the two arms 25 of the respective pair a single element with spar 23 from which they emerge; the element mentioned actually exists of two half-elements made of shaped sheet metal, denoted by 2 7a and 2 7b in Fig Borders 19 are provided and can be connected to one another in order to create the element to educate yourself; also the cross sections of the arms 25 and the spars 23 s.md are substantially rectangular.

The cross-sections det> Cross members 24 are also rectangular and come from the connection of two cross member halves 24a, 24b (Fig.14) from the mold, which are provided with circumferential longitudinal borders L9, sudass they can be connected to one another when placed next to one another. Each cross member is analogous to the beams 6 to 11 provided with correspondingly shaped wings 22 at the ends, which applied to parts of the spars 2 3 in order to connect the former with the latter.

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The rear part 3 of the structure, which can be seen in detail in Figures 15, 16 and 17, also has the shape of a closed frame and essentially comprises a pair of spars 30 (Figure 2) and a pair of front cross members 31 ( Fig.l) and rear cross member 32 · the connection of said rear part with central part 1 is accomplished via zi-jei pair of arms 34 (Fig.l, 15 and 16); those of one pair protrude from one end of the front cross member 31, while those of the other pair protrude from the other end of the same cross member. The free end of the two arms of each pair is connected to the rear post 18 (Fig. 1) in such a way that together they cfisssetn part a three-way effective, in the figures. 15 and 16, denoted by 35, form the resistance element, which establishes the connection between the rear part 3 and the wider middle part 1 »

The four arms 34 of the two pairs are together with the front cross member 31, from which they protrude as an element, manufactured; that is called the © element from a pair of half-elements made of structural steel, in Fig.17 marked with 34a and 34b, the eo@nfaJ.ls with encircling Borders 19 are provided and placed together and can be connected to each other; the cross-sections the arms 34 and the cross member 31 are also essentially rectangular »

A pair of struts 36 (Figures 2 and 15) is expediently used as a further connecting and stiffening element provided between the rear part 3 and the rear post 18 of the two side parts 4.

The load-bearing structure, as described, has numerous favorable properties.

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Above all, it represents a spatial structure with great mechanical strength, the very is stiff and light, and which affects both forces and moments of force, regardless of where they act, can respond effectively; in particular, it has considerable rigidity against both bending and bending Torsional loads, which is of great interest from a practical point of view. Greater rigidity and strength result from the special shape of the elements that make up the structure, and from the choice of their liaison offices.

In tests with the structure according to the invention it was indeed found that the efficiency in relation to torsion and bending, determined as the ratio of torsional and flexural strength and Weight, turns out to be much higher and higher than the level of efficiency that can be achieved with a built-up vehicle since then conventional kind is achieved; it was actually found that the efficiencies in terms of twisting and bending are approx. 50% and 100% higher than those for the above-mentioned structures were determined.

It is therefore the attack on the vehicle while driving Forces effective resistance opposed, with those on the structure to complete the body fastened parts do not need to have any other function than to close off the interior from the outside and protect.

The structure described lends itself to zones of different Rigidity: to be created, with the middle section intended for the formation of the passenger compartment

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possesses the greatest rigidity, and the front and rear Parts of the most deformable parts are also larger by means of deformation of these sole parts To destroy impact energies.

In particular, the central part 1 of the structure protects the is designed to accommodate the passenger compartment, the passengers against any knocks against the structure, should these come from the side, from above or from below; there are the elements that make up the structure are arranged on all sides and evenly distributed over the length of the structure, is the one achieved by this Protection really integral.

In addition, due to the method described, with which the connection between the various Parts of the construction is accomplished, essentially one monolithic structure, with the advantage that the whole structure is attacking at some point Resists loads in its entirety, since the loads are evenly distributed across the structure to distribute.

After the stresses occurring on the front and rear part of the structure as a result of the three-sided structural elements 26 and 35 realized Zones are evenly distributed over the middle part, even if it is wider than the ones mentioned above Parts, it can be concluded that precisely these elements door the actual transmission zones represent the longitudinal flow of the stresses.

Due to the shape of the spars, the posts and the body wearer can easily attach the other parts intended to complete the body Structure to be attached and secured; In fact

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These structural elements have flat surfaces and thus form clearly defined and adequately dimensioned Contact surfaces; the support walls can easily be used with suitable fastening means to attach, which are necessary for the assembly of other parts on the structure.

Finally, there is also a greater resistance to external influences, in particular to Corrosion, since the overall attack surface of the structure exposed to these influences is smaller.

The construction can be done in a simple and economical way are made as the various elements that make up it are made by plastic deformation of the sheets is reached, and these are connected by welding.

Obviously, there is a possibility of changing the shape and arrangement of the various parts of what is described Structure according to the invention also to change and vary, without the area of the actual Invention to leave.

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Claims (12)

Patent claims Vl. ! Load-bearing structure for motor vehicles of the type that a large number of elements are rigidly connected to one another in such a way that they form a three-dimensional network Structure result, this structure being a central part in the training as the passenger compartment of the Includes motor vehicle, as well as front and rear parts that protrude from said Mitte.ltei.1 and are intended to accommodate elements and mechanical assemblies of the motor vehicle itself, characterized in that the central part substantially comprises a pair of side parts which each essentially consist of a closed frame, which is provided with a center post is, and of a plurality of beams which are substantially perpendicular to the plane of these side parts stand and intended to connect the two side parts with each other. 2. Supporting structure according to claim 1, characterized in that the perpendicular to the longitudinal axis of the structure measured width of the front and rear part is significantly smaller than that of the middle part mentioned. 3. Load-bearing structure according to claims! Or 2, thereby characterized in that each side part consists of a pair of side part halves from molded sheets, each of which are provided with a circumferential edge so that they can be placed next to one another and connected to one another, to form such a side part. 4. Load-bearing structure according to claims 1, 2 or 3, characterized in that each side part has two comprises substantially parallel spars, one below and the other above, a front post that consists of a first vertical part and a second part, which is inclined to this, and a rear part Post composed essentially of two parts of equal length, both of which are perpendicular are inclined towards, as well as towards the aforementioned central post, the cross-sections of these posts and spars transversely 2U of their longitudinal axis are essentially rectangular are. 5. Load-bearing structure according to one of the preceding claims, characterized in that three carriers are provided are to connect the upper bars of the two side parts, and another three beams around the to connect lower spars of the same side panels, and a bracket to connect the front posts of the two side parts, essentially in the area of the intersection of the two parts of the relevant Post. 130062/0794 -3- 311966 6. A supporting structure according to claim 5, characterized in that each carrier consists of a pair of carrier halves ? jus FormsLahl consists of surrounding edges, the ane.i can be laid one on top of the other and bonded to one another in order to form the carrier, whereby the cross-sections of the beams are substantially rectangular. 1. Supporting structure according to one of the preceding claims, characterized in that ^ each carrier is provided with wings at the ends, which are designed so that they rest on the spars and on the post, and the wings with the spars and posts can be connected & epa. 8. Load-bearing structure according to a ddff preceding claims, characterized in that the front part comprises a closed frame which is substantially from a pair of spars, from a pair of cross members perpendicular to the spars and connected to them, and consists of two pairs of arms which serve to connect the front part to the central part, wherein the two arms of one pair protrude at one end of a stile, and the two legs of the other pair at the Stick out the end of the other spar, and the two arms of each pair form a V with each other, and are connected to the first vertical post part of a side part in such a way that they together form an after three sides form a resistant element. 130082/0794 * ^A 9. Load-bearing structure according to claim 6, characterized in that the two arms of each pair are connected Form element, and consist of one piece with the frame spar from which they protrude, wherein the element from a pair of element halves There is shaped sheet metal, each provided with a circumferential edge so that they are placed against one another and can be interconnected to form the element, and the cross-sections of the arms and the spar of the element are substantially rectangular. 10. Load-bearing structure according to one of the preceding claims, characterized in that the rear part comprises a closed frame which is substantially from a pair of spars, from a pair of cross members perpendicular to the spars and with them connected, and consists of two pairs of arms that connect the rear part to the central part serve, the two arms of a pair protruding from one end of a cross member, and the two arms of the other pair protrude at the other end of the same cross member, and the two arms of each pair are connected to part of the rear post of a side part so that they are together a form a resistant element on three sides. 11. Supporting structure according to claim 10, characterized in that the four arms of the two pairs consist of an element together with the cross member from which they protrude and that the element is a Includes pair of element halves made of shaped sheet metal, which are each provided with circumferential edges, so that they are placed next to each other and connected to each other 130062/0794 3119668 the can thus form an element au, and the cross-sections of the arms and the cross member of the element are substantially rectangular. 12. Supporting structure for Kraft irahrseuge essentially as described and shown in the accompanying figures.