JPS59106372A - Load-bearing structure for automobile - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] A road bearing structure for an automobile comprising a number of parts connected to each other in a lattice shape. The structure of the invention is characterized in that each part consists of a suitable longitudinally closed tubular member.

BACKGROUND OF THE INVENTION This invention relates to a load bearing structure for an automobile that includes a number of parts interconnected in a grid configuration.

Reticulated load bearing structures consisting of pressed and welded sheet metal box members are already known. Each member of this known structure is constructed by welding the straight side edges of two halves of twice pressed or rolled sheet metal parts overlapping the corresponding side edges of the other half. It is a hollow part of the book. Next, various parts are connected with special joints〈1
(cross joints, cross joints, etc.) to create a net-like load of the desired shape.
Make it into a bearing structure.

Considering the specific shapes of the various components, prior known structures have a number of drawbacks.

In particular, there are many problems when a large number of presses and dies are required to manufacture half the car body. In addition, a robust metal workshop must be established for assembling large numbers of parts.

Further, when protecting the net-like structure with paint, there is a problem in that it is difficult to apply the paint to the recesses formed along the welded side edges. Similarly, there is a problem that the paint does not spread to the inside of the structure at the joints.

Object of the Invention 1 The object of the invention is to provide a bearing structure that is lighter in weight, has greater rigidity, has superior strength and shock absorbing ability, and is extremely simple to use, compared to the conventional one-door bearing structure. It is an object of the present invention to provide a door bearing structure for an automobile that can be manufactured economically.

A further object of the present invention is to provide atmospheric factors,
It is particularly resistant to corrosion and has an impact load bearing structure that allows easy and safe installation of the parts needed to complete the vehicle body and mechanically assemble the engine.

Taking the above considerations into consideration, the present invention has been developed to provide an automotive vehicle assembly comprising a closed tubular body in which a large number of parts are interconnected to form a lattice, and each of the parts is formed into an appropriate length.
” Concerning single-head bearing structures.

[Description of Embodiments] Next, embodiments of the present invention will be described in detail with reference to the drawings.

The fixed bearing structure 1 for automobiles according to the present invention includes:
Bottom frame 2 and mesh frame 3 attached to its top
As shown in the drawing, the mesh frame 3 has a front narrow space for holding the engine (4), a medium fire chamber 5 as a vehicle compartment, and a rear space that can be used as a cargo space, for example. It has a narrow 6 and a hollow.

The bottom frame 2 mainly consists of a pair of rectangular meshes 41G.
It consists of structures 8 and 9, and the rear structure 9 is slightly higher than the front structure 8.

The structure 8 consists of two parallel sides 1 11, 12, each end connected to a structure 9, which combines the structure 8 with a slightly higher structure 9. Two bends are provided for this purpose. The ends of the structure 8 are delimited by two tubular cross members 13.14, each of which is connected to the distal end of a side member 11.12. Four extension parts 13a, 13b and 14a, 14b protruding outward from the tail 12 are formed. Approximately in the middle of the side members 11.12 there are also a pair of outwardly projecting extensions 15.16. lastly,
In the area partitioned by the side members 11.12 and the lateral members 13.14, the rectangular structure 8 is further provided with a tubular structure disposed in an X-shape on the diagonal of the rectangular structure 8. Two tubular members 17.18 connected to the transverse members 13.14 are provided.

On the other hand, the rectangular structure 9 is provided with two straight tubular side members 19.20 arranged in parallel and connected to each other by two tubular cross members 21.22.

The upper frame structure 3 of the invention consists of a pair of molded tubular members 25, 26, each extending from the engine compartment 4 to the luggage compartment 6 and forming the upper part of the passenger compartment 5. The tubular members 25 and 26 are connected to the tubular transverse members 27 and 28.
, 29, 30, 31, 32 and 33. Each of the shaped tubular members 25, 26 has three struts 35,
36.37 and 38.39.40, and the other ends of the struts are connected to tubular side members 41 and 42, respectively.

These elements 41, 42 reinforce the structure 1 and connect the framework structure 3 to the extensions 13a, 14a, 1 of the bottom frame 2.
5 and 13b, 14b, and 1G.

The lower part of the column 35 is connected to the end of the tubular member 41,
The upper portion is connected to a shaped tubular member 25 forming the sides of the windshield opening. The midpoint of the support column 35 is connected to the tubular member 25 via a tubular arm 47, and the bent portion of the tubular member 25 is connected to the transverse member 28 to form an engine room. The strut 38 is also similar to that previously described, in this case the tubular arm is designated by the reference numeral 48.

The struts 36.39 are straight, but the struts 37.40 have many bends. Especially the bottom 50.51 is 41!
The rear part of the structure is shaped like an arc to accommodate the rear fender.

From the rear cross member 33 of the luggage compartment 6, two curved tubular extensions 52,53 project downwardly for connection with the ends of the cross member 22 of the frame 2.

The engine compartment 4 is formed by a network of tubular members arranged in parallel, the upper side of which consists of one end of the tubular members 25 and 26 and the transverse members 27 and 28. The bottom end of this parallel tubular member structure is comprised of a bottom forward cross member 56 and a rear cross member 57 connected to tubular side members 58 and 59, respectively. The ends of the transverse member 57 are connected to the struts 35 and 3.
8 and is connected below the connecting point of arms 47 and 48.

The front transverse member 5G includes two tubular members 6 fixed at a portion shorter than the transverse member 21 connected to the ends of the tubular members 25 and 26.
It is connected to the transverse member 27 by 1°62.

Each of the tubular members is provided with a hole 63 to allow the protective paint to be applied to the inside of the tubular member.

The manufacturing process for producing and assembling the components of the load bearing structure 1 is extremely simple. The material is a sealed tube member that can be purchased at the lowest price on the market. The various parts are bent longitudinally into the desired shape on conventional forming machines using appropriate tooling. Then, it is sent to a metal processing factory and the load bearing structure 1 is assembled using a small number of machines (welding machines, cutting machines, bolting machines, etc.). Each part may be welded or simply screwed using known fastening bolts.

Then, it is painted using, for example, an electrophoresis device. In the case of electrophoretic painting, the paint is not evenly applied to the outer surface, but is applied to the inside of the part through the holes 63.

At this stage, the load bearing structure can be easily fitted with the mechanical parts consisting of the engine and power transmission and, if necessary, other body parts that must be assembled.

The advantages of the load bearing assembly according to the invention of this application compared to those of the previously known type mentioned at the outset will now be clearly explained.

First of all, structures made of tubular members instead of welded half-members have much greater mechanical strength and stiffness;
Moreover, it is extremely light and small, so no matter what kind of stress is applied to it, there will be no problem. In particular, it can withstand bending and torsion stresses, which are actually a source of concern for designers. The feature of this hardness and strength is that each component is box-shaped. Since this structure is able to withstand all the forces applied to the vehicle when the vehicle is in motion, the body parts attached to the structure may be designed to be housed and protected within the structure. By carefully selecting the size and cross-sectional area of each component, it is possible to avoid creating sections of varying stiffness in the structure.

For example, the center section housing the single chamber can be made more rigid than the front and rear sections, so that when an impact is applied, the energy is dispersed so that only the front or rear sections are deformed.

Furthermore, as already mentioned, the shapes of the parts for manufacturing the various parts allow other parts of the vehicle body to be easily attached to the structure 1.

In fact, the component is provided with a flat surface, providing a robust and sufficiently generous support surface for connecting the structure and the components connected thereto.

The structure of the present invention is better than the known structure because unlike the known structure in which two metal plates are welded along the side edges, there is no depression due to welding. It has much better resistance to chemical components in the atmosphere, especially corrosion resistance.

Finally, from what has already been said, the load bearing structure of the present invention is easy and inexpensive to manufacture since, unlike conventional structures, the operations require simple cutting and bending of the components, which requires less expensive machinery. can do.

Modifications may be made to the tubular components forming the load bearing structure of this invention without departing from the spirit of the invention. For example, the tubular member need not be hollow, but may have internal and/or external longitudinal reinforcing material, and may have a circular or polygonal cross section. You can also do it.

Preferably, the above-mentioned parts are made of metal, but according to the present invention, these parts can also be made of any suitable material.

[Brief explanation of drawings]

The accompanying drawing is an exploded view of the load pair link structure of the present invention. In the drawing, the main parts are indicated by the following symbols. 1...Automotive load bearing structure 2.
...Bottom frame 3...Mesh frame 8.9...Long rectangular structure 11.12, 19.20...Side member 13.14
, 21.22... Horizontal member 25.26...
・Tubular members 35, 36, 37, 38, 39, 40...Branch 63...Ana and 1 other person Procedure amendment (method) November 1980
May 7th, Kazuo Wakasugi, Commissioner of the Japan Patent Office1, Indication of the case, 1981 Patent Application No. 1744432, Name of the invention, Automobile load bearing structure 3, Person making the amendment, Relationship to the case, Patent applicant's residence Address: 12062 Cherasco, Italy, Here Hontobare, 1 name: Leighton Fisore Niss B.A. 4, Agent address: 1-1-21 Nishizanbashi, Minato-ku, Tokyo 105 Amended application form, power of attorney, and drawings・-5 399-

Claims (1)

[Scope of Claims] 1. A load bearing structure for an automobile, characterized in that a large number of parts are connected to each other in a lattice shape, and each of the parts is formed into a vertically long molded sealed tube. 2. The structure has a first group of parts forming a bottom frame (2) and a second group of parts forming a net-like frame (3) like an inverted top connected to the frame (2). A structure according to claim 1, comprising: 3. The bottom frame (2) is composed of a pair of rectangular structures (8, 9>) having a common horizontal member (14), and one of the structures is horizontally arranged relatively higher than the other. 4. The structure according to claim 2, characterized in that each of the rectangular structures (8, 9) is connected to a horizontal member (1).
3, 14, 21, 22)
11.12, 19.20) The structure according to claim 3. 5. A pair of cross-shaped inner members (17,
Claim 3 characterized in that 18) is provided.
or the structure according to item 4. 6. Shape the mesh frame (3) to form the upper end of the automobile, and attach each side member (27, 28, 29)
, 30, 31, 32, 33).
, 26,) extending in the longitudinal direction from the front to the rear of the load bearing structure. body. 7. Each pair of the tubular members (25, 26) is connected to a strut (, 3
5, 36, 37, 38, 39, 40>, and the opposite end of the column is connected to a tubular member (41, 42) that connects to the bottom frame (2). The structure according to scope item 6. 8. Connect each of the sealed chamber-like portions H with a joint or a hole (63
) The structure according to any one of claims 1 to 7, characterized in that it communicates with the outside through a structure. 9. The structure according to claim 1, wherein the tubular members are welded together. 10. The structure according to any one of claims 1 to 8, characterized in that adjacent members are connected using one bolt. 11. Structure (4) according to any one of claims 1 to 10, characterized in that the Yokota i-plane of each of the tubular members is polygonal. 12. The structure according to any one of claims m1 to 10, wherein each of the tubular members has a circular cross section. 13. The item 1 according to any one of claims 1 to 12, characterized in that ribs in the longitudinal axis direction are provided on the inside and outside of each of the sealed tubes.
Structure.