RU2481975C2 - Car rear boot - Google Patents

Abstract

FIELD: transport.

SUBSTANCE: invention relates to automotive industry. Car rear boot comprises frame attached from body side and extendible mechanism. Structural transverse beam is arranged at said frame. Said frame can be attached to rough body by said structural beam. Said structural beam tales up forces acting from loaded and extended rear boot at body bottom.

EFFECT: simplified design.

4 cl, 2 dwg

Description

The invention relates to a rear trunk for a car with a frame attached to the body side and a retractable mechanism.

Rear (external) luggage racks are known, for example, in the form of a rear luggage carrier for transporting a bicycle by car. They have a frame or, accordingly, a longitudinal bearing element, which, when assembling the car, are mounted on its rear part of the body. A movable sliding mechanism is located on the frame, which can be advanced from the retracting position and retracted. In the push-in position, the rear trunk is designed in such a way that it is completely sunk into the rear of the car and closes it flush with the corresponding casing. This reduces the pollution of the rear trunk when not in use and reduces aerodynamic drag in driving mode. Such rear roof racks or their components are known, inter alia, from the applications DE 102004008530 A1, DE 10338724 A1, as well as DE 102004035429 A1.

Especially with large-scale production on a conveyor, in which identical unfinished bodies are equipped with different equipment options, of course, the problem arises that such rear racks should not be mounted on all unfinished bodies. Nevertheless, in order to facilitate production, it is necessary to provide suitable reinforcements in the rear area of unfinished bodies in order to enable the rear luggage carriers to be mounted with sufficient stability. For this purpose, either the unfinished body itself is made with the appropriate thickness of the material in the fastening areas, or additional steel sheets must be provided and mounted in order, inter alia, to provide the possibility of receiving the arising twisting forces with the rear trunk extended or retracted. Due to this, the assembly costs and the cost of material for the manufacture of a vehicle so equipped are substantially increased.

The objective of the invention is to create a rear trunk of the type mentioned above, which in a simple manner and without significant costs in the manufacture of the car can be mounted on its body.

In accordance with the invention, the problem is solved due to the fact that a structural transverse beam is located on the frame.

With previously used rear car trunks, the frame is mounted in the area of the rear of the car body, or in specially reinforced areas, or by means of an additional welded design of the reinforcing panels with the body. This installation step can be dispensed with due to the additional structural crossbeam, which, for example, is attached between two longitudinal beams that form the frame, which essentially extend transversely to the direction of the vehicle, on these beams. During installation, such a finally assembled component, which consists of a rear trunk with a frame and a structural transverse beam, can be stocked in the form of a structural element and preferably, as described in the following, mounted on the body. In principle, it is possible to stock up the structural transverse beam in the form of a separate structural element and only during installation to position and fix it on the frame of the rear trunk or in the corresponding installation location on the body.

It goes without saying that the dimensions and thickness of the material of the structural crossbeam are selected in such a way that the rear trunk can be mounted on the body with sufficient stability and without deformation of the unfinished body. In addition, traffic safety should be ensured in relation to requirements in the event of a collision or deformation of the body in the event of a traffic accident. An additional structural transverse frame accepts vertical forces acting from the loaded and extended rear luggage carrier on the lower body part and, first of all, prevents deformation or fatigue of the body material under prolonged load.

An advantage of the invention lies in the fact that due to the cost-favorable in the manufacture of the structural transverse beam, which is preferably also made of the metal from which the body is made, installation costs are significantly reduced. Structural transverse beam should be provided only for those bodies that really should be equipped with a rear outer trunk.

In a simple way, the structural transverse beam is made in the form of a molded profile and can be cut out from a flat cut material blank, and it can be given the desired shape.

In order to give the structural crossbeam with a limited dead weight sufficient shape stability, it is provided with reinforcements and / or stiffeners, which, for example, can be welded in the form of reinforcing sheets or can be made in the form of flanged elements or double layers of material.

For mounting the structural transverse beam, the structural transverse beam is equipped with one or more bushings, which are either in the form of a single element with it, or are additionally welded to it in the form of a welded joint. Bolts can be passed through the bushings, which, in turn, with the help of nuts interact with the unfinished body in order to easily screw the structural transverse beam or the rear trunk as a whole to the body. One of skill in the art can make suitable bolt calculations for their number and / or size, for example, two or four bolts, sleeves, and nuts. Thus, using a simple threaded connection, a structural connection closed in itself is obtained, which consists of a rear trunk frame, a structural crossbeam, as well as a car body. Due to the screwing with a strong tightening torque, a long-term fastening of the rear trunk on the car body is also ensured. Alternatively, the fastening can also be carried out with insulated screwing, corresponding to the screwing options on the subframe, in order to reduce load peaks in the high-frequency region. In accordance with this, long-term strength is increased and vibrational noise is reduced.

It is understood that the features mentioned above and described below may be applicable not only to the combination indicated as necessary, but also to other combinations. The scope of the invention is defined only by the claims.

In the following, the invention is explained in more detail on the basis of an example implementation with reference to the drawings, where:

figure 1 shows in perspective a structural transverse beam corresponding to the invention of the rear trunk; and

figure 2 shows in perspective a rear trunk with a structural crossbeam.

The structural transverse beam 4, cut out, for example, from a metal sheet and shaped in the desired manner, has a kind of wavy profile. To reinforce the structural transverse beam 4, it is provided with doubling material 7 and / or flanges passing along its edge as reinforcement. In addition, reinforcements 5 or reinforcing sheets are welded to the structural transverse beam 4 in order to increase its bending strength.

For fixing the frame 2 of the rear trunk 1 of the external type to the structural transverse beam 4 and the structural transverse beam 4 on the body not shown, there are bushes 6, which are made as a single element made integrally with the material of the structural transverse beam 4 or additionally welded to it. Through the sleeves 6 can be held bolts for interaction with nuts, which, for their part, are rigidly welded to the car body. Using this screwing, the rear trunk 1 can easily be mounted on the car when mounting the car. In particular, each car body can be equipped with nuts of this kind without significant costs, so that the rear trunk 1 can be mounted on each desired car body. The bushings 6 can also be located on additional plates 8 on the structural transverse beam 4.

By means of the structural crossbeam 4, the rear trunk 1 is attached to the vehicle body to give additional stability and rigidity, as a result of which vibrations are prevented, especially in the vehicle driving mode with the rear trunk 1 extended, or material fatigue due to the thickness of the vehicle body material too small.

In a manner known per se, the rear trunk 1 comprises a retractable mechanism 3, so that, for example, it is possible to transfer the bicycle holder from an extended position to an extended position and vice versa.

The structural crossbeam 4 is mounted on the frame 2 of the rear trunk 1 also by screwing, the frame 2 being formed by two longitudinal beams extending essentially in the longitudinal direction of the vehicle.

Reference List

1 Rear trunk

2 frame

3 retractable mechanism

4 Structural crossbeam

5 Gain

6 sleeve

7 Doubling material

8 bar

Claims (4)

1. The rear trunk for a car with a frame (2), attached on the side of the body, and a retractable mechanism (3), characterized in that on the frame (2) is a structural transverse beam (4), and the frame is made with the possibility of attachment to an unfinished body by means of the structural beam, while the structural beam (4) perceives the forces acting from the loaded and extended rear trunk on the lower body. 2. The rear trunk according to claim 1, characterized in that the structural transverse beam (4) consists of a molded profile. 3. The rear trunk according to claim 2, characterized in that the structural transverse beam (4) is provided with reinforcements (5) and / or stiffeners. 4. The rear trunk according to one of claims 1 to 3, characterized in that the structural transverse beam (4) is equipped with one or more bushings (6) for passing bolts.

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