Source: http://www.google.com/patents/US6733068?dq=5,815,488
Timestamp: 2017-02-21 12:43:49
Document Index: 621840501

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Patent US6733068 - Device for increasing strength of a hollow shaped part of a vehicle body - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA device for increasing strength of a hollow shaped part with a closed cross-section for a vehicle body has at least one reinforcing element extendable at least partially into an inner space of the hollow shaped part and connectable with the hollow shaped part, and an aperture provided in the hollow...http://www.google.com/patents/US6733068?utm_source=gb-gplus-sharePatent US6733068 - Device for increasing strength of a hollow shaped part of a vehicle bodyAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6733068 B2Publication typeGrantApplication numberUS 10/158,736Publication dateMay 11, 2004Filing dateMay 30, 2002Priority dateMay 30, 2001Fee statusLapsedAlso published asDE10126183A1, EP1264758A1, EP1264758B1, US20020180245Publication number10158736, 158736, US 6733068 B2, US 6733068B2, US-B2-6733068, US6733068 B2, US6733068B2InventorsHamdi Dogan, Rainer Wess, Markus ExnerOriginal AssigneeWilhelm Karmann GmbhExport CitationBiBTeX, EndNote, RefManPatent Citations (14), Referenced by (4), Classifications (6), Legal Events (8) External Links: USPTO, USPTO Assignment, EspacenetDevice for increasing strength of a hollow shaped part of a vehicle body
US 6733068 B2Abstract
What is claimed is: 1. A device for increasing strength of a one-piece hollow shaped part with a closed cross-section for a vehicle body, comprising:
at least one reinforcing element extendable at least partially into an inner space of the one-piece hollow shaped part in a longitudinal direction at least in a section over a length of the hollow shaped part, wherein said at least one reinforcing element is connected with the one-piece hollow shaped part, wherein an aperture is provided in the one-piece hollow shaped part, said aperture being formed in a manner that said reinforcing element extends into the inner space of the one-piece hollow shaped part, and a centering contour formed in the one-piece hollow shaped part at least over a portion of a region of an end of said reinforcing element arranged in said inner space, whereby the centering contour is arranged so that in the event of a deformation of the one-piece hollow shaped part, the reinforcing element is received into the centering contour and centered there. 2. A device as defined in claim 1, wherein the hollow shaped part is formed as a molded one-piece component.
3. A device as defined in claim 1, wherein said reinforcing element extends in a longitudinal direction at least in a section over a length of the hollow shaped part.
4. A device as defined in claim 1, wherein said reinforcing element has one end which in a region of said aperture extends outwardly beyond an outer side of the hollow shaped part and is provided at said end with a device selected from the group consisting of a positioning device, a body connection device, and both.
5. A device as defined in claim 1, wherein said reinforcing element has a free end extending into the inner space of the hollow shaped part.
6. A device as defined in claim 1, wherein said reinforcing element has an I-profile and is located at least approximately centrally of the hollow shaped part.
7. A device as defined in claim 6, wherein said reinforcing element has said I-profile in a cross-section.
8. A device as defined in claim 1; and further comprising an additional such reinforcing element, said reinforcing elements being provided in a longitudinal direction of the hollow shaped part.
9. A component of a vehicle body, including a one-piece hollow shaped part having a closed profile with an inner space and an aperture; a reinforcing element arranged at least partially in said inner space of said one-piece hollow shaped part and connected with said one-piece hollow shaped part, said reinforcing element extending into said inner space of said one-piece hollow shaped part through said aperture in a longitudinal direction at least in a section over a length of the hollow shaped part, and
a centering contour formed in the one-piece hollow shaped part at least over a portion of a region of an end of said reinforcing element arranged in said inner space, whereby the centering contour is arranged so that in the event of a deformation of the one-piece hollow shaped part, the reinforcing element is received into the centering contour and centered there.
The present invention relates to a device for increasing the strength of a hollow shaped part of a vehicle body, which has a closed cross-section.
German patent document DE 195 18 946 A1 discloses a vehicle structural component or a hollow shaped part with a closed cross-section, which is formed of at least two interconnected components. The vehicle structural component is a front support or a A-support of a vehicle body, composed of an outer plate, a support reinforcement and an inner support of light metal. For stiffening of the vehicle structural component, a reinforcing element produced of light metal extrusion is provided. It has an outer shape which is substantially identical to an inner shape of the closed cross-section of the vehicle structural component. The reinforcing element is arranged inside the region of the closed cross-section of the vehicle structural component.
For further increase of the strength of the vehicle structural component, several iron elements, such as for example a steel pipe or a steel plate or similar elements, are arranged along the hollow region of the reinforcing element.
The disadvantage of this solution is however that the vehicle structural component is composed of several individual parts which must be held before the manufacture and connected with one another in various manufacturing steps. This leads to a complicated and cost-intensive manufacturing process.
Moreover, another disadvantage of this solution is that the known vehicle structural component, due to the complicated multi-part construction, has a high total weight. This is disadvantageous for the automobiles since it is contrary to the tendencies in automobiles for reducing the fuel consumption by reducing the vehicle weight.
In addition, the known vehicle structural component has the disadvantage that the reinforcing element provided in the inner space of the vehicle structural element has low manufacturing tolerances, to ensure an easy adaptation of the reinforcing element in the interior space of the vehicle structural element.
Accordingly, it is an object of the present invention to provide a device for increasing the strength of a hollow shaped part of a vehicle body, having a closed cross-section, which eliminates the disadvantages of the prior art.
More particularly, it is an object of the present invention to provide a device for increasing the strength of a hollow shaped part with a closed cross-section for a vehicle body, which makes possible the manufacture of a vehicle body with a high strength and a low total weight, and with low manufacturing costs.
In keeping with these objects and with others which will become apparent herein after, one feature of the present invention resides, briefly stated, in a device for increasing the strength of a hollow shaped part with a closed cross-section for a vehicle body, in which the reinforcing element extends through an aperture of the hollow shaped part in its inner space.
Since the inventive device has the reinforcing element which is arranged at least partially in an inner space of the hollow shaped part, and also is connected with the hollow shaped part and extends through a recess of the hollow shaped part in its inner space, a simple mounting and manufacture of a correspondingly designed vehicle structural component is provided in an advantageous manner. This leads to reduced manufacturing costs.
Moreover, the inventive device has the advantage that a hollow shaped part of a vehicle body which is provided with the inventive device has a high component strength with a low weight. The reason is that the hollow shaped part after its manufacture is provided with a simple design reinforcing element which is inserted through the aperture into the inner space and is fixedly connected with the hollow shaped part.
A special cost-favorable manufacture of a hollow shaped part of a vehicle body is provided when the hollow shaped part is formed as a one-piece component which is produced by an inner high pressure molding and provided with the reinforcing element. Thereby a hollow shaped part of a vehicle body, such as for example an A-support can be produced with cross-sections which correspond to special construction space requirements and strength requirements in one manufacturing step, and can be provided with a reinforcing element in particularly highly loaded regions in the above described simple manner.
FIG. 1 is a simplified three-dimensional view of a body of a cabriolet or convertible vehicle;
FIG. 2 is a schematic three-dimensional view of a vehicle structural component, taken separately;
FIG. 3 is a schematic view of the structural component of a vehicle body of FIG. 2;
FIG. 4 is a view showing a cross-section of the vehicle structural component, taken along the line IV—IV in FIG. 3;
FIG. 5 is a sectional view of the vehicle structural component of FIG. 3 taken along the line IV—IV, and showing an embodiment of the arrangement of the reinforcing element which is different from FIG. 4;
FIG. 6 is a view showing the further cross-sectional view taken along the line IV—IV in FIG. 3, and showing a further embodiment of the hollow shaped part which is different from FIG. 3;
FIG. 7 is a cross-sectional view of the vehicle structural component of FIG. 3, taken along the line VII—VII in FIG. 3;
FIG. 8 is a view showing a further cross-sectional view of the vehicle structural component of FIG. 3 taken along the line VIII—VIII, wherein the reinforcing element is provided with a device for positioning and/or connecting the hollow shaped part to the vehicle body.
FIG. 9 is a view showing another modification of the structural component with an additional reinforcing element.
FIG. 1 shows a vehicle body 1 of a cabriolet or convertible automobile, with vehicle structural components formed as hollow shaped parts. An example for illustration of the invention is a hollow shaped part 2 which represents a A-support of the vehicle body 1 and is shown in FIG. 2 separately.
The vehicle structural component 2 is shown in FIG. 3 schematically in a cross-section. The vehicle structural component or the hollow shaped part 2 is formed with a closed cross-section. It is provided with a device 3 for increasing the strength of the hollow shaped part 2. The device 3 has a reinforcing element 5 that extends in an inner space 4 of the hollow shaped part 2. It is fixedly connected with the hollow shaped part 2.
The reinforcing element 5 is inserted in an aperture 6 or 7 of the hollow shaped part 2 into the inner space 4 of the hollow shaped part 2. It has a thickness, size and shape which corresponds to those of the inner space 4 of the hollow shaped part 2. The reinforcing element 5 at least extends into the inner space 4.
In the subsequent description in FIGS. 4-8 components which are identical functionally are identified with the same reference numerals to simplify the description and the illustration.
The hollow shaped part 2 is shown in FIG. 4 in a cross-section which is taken along the line IV—IV in FIG. 3. The reinforcing element 5 has a cross-section of a flat profile. The reinforcing element 5 has an end which faces away of a slot-shaped aperture 6. It is engaged with this end into a second aperture 7 located in the hollow shaped part 2 substantially opposite to the aperture 6, and is held there.
The apertures 6 and 7 are produced by conventional methods. For example, they can be made by sawing or by laser cutting in the vehicle structural component 2.
The reinforcing element 5 therefore forms a central web of the hollow shaped part 2. It is fixedly connected with the hollow shaped part 2 in the regions of the apertures 6 and 7.
FIG. 5 shows a second embodiment of the device 3. Here the hollow shaped part 2 is however provided with the apertures 6 for insertion of the reinforcing element 5 into the inner space 4 of the vehicle structural component 2. The end of the reinforcing element 5 which is opposite to the aperture 6 is arranged at a distance from the wall of the hollow shaped part 2.
FIG. 6 shows a further embodiment of the device 3, with a section of the hollow shaped part 2 taken along the line IV—IV in FIG. 1. This hollow shaped part 2 is provided with a curved out portion which is located at the side of the reinforcing element 5 that is opposite to the aperture 6 and formed as a centering contour 8. The reinforcing element 5 extends with its end into the curved portion of the centering contour 8 of the hollow shaped part 2. In the event of a deformation of the hollow shaped part 2 which can be caused by a crash, the reinforcing element 5 is received into this curved portion and centered there, so that an uncontrollable deviation or buckling is avoided or at least reduced. Thereby the strength of the hollow shaped part 2 and therefore of the vehicle body 1 has a desirable high level also in the event of a crash.
In accordance with a not shown embodiment of the device 3, it can be provided that the hollow shaped part 2 at the side facing away from the aperture 6 can be formed alternatingly or in any arrangement with the further aperture 7 and with the centering contour 8. The reinforcing element, depending on the corresponding application cases, can be fixedly connected with the hollow shaped part 2 or not connected with it in the region of the aperture 7 which extends locally in corresponding sections.
FIGS. 7 and 8 show a further embodiment of the device 3 in a cross-section taken along the lines VII—VII and VIII—VIII in FIG. 3. The reinforcing element 5 is provided with a device 9 for body connection and for positioning of the reinforcing element 5. The reinforcing element 5 extends with an end in the region of the aperture 6, outwardly beyond an outer side 10 of the hollow shaped part 2 and forms at this end the device 9 for positioning and body connection.
When the hollow shaped part 2 has two apertures 6, 7, it is to be understood by a person skilled in the art that the reinforcing element 5 is formed so that, in deviation from the above described embodiments, it extends in the region of the further aperture 7 outwardly beyond the inner space 4 of the hollow shaped part 2. A further device for positioning and connection of the reinforcing element 5 and thereby the vehicle structural component 2 can be arranged on the vehicle body 1, which can take place in some cases instead of the device 9.
The device 9 for positioning and body connection preferably can be formed as a bracket which remains outside the hollow shaped part or the A-support 2. The bracket 9 is provided with openings 11 and can be used in some cases also for mounting of further components in the vehicle, such as for example hoses, cables and the like.
The hollow shaped part 2 of the above described embodiments is formed as a one-piece component produced by inner high pressure molding. It has a variable cross-section which can locally correspond to the special structural space requirements and the strength requirements of the vehicle body 1.
The reinforcing element 5 can be fixedly connected with the hollow shaped part 2 in the region of the aperture 6 by thermal connecting process. For example, it can be connected by welding or soldering with the hollow shaped part 2. Furthermore, it is believed to be clear for a person skilled in the art that a fixed connection can be also provided for the corresponding applications, between the reinforcing element 5 and the hollow shaped part 2 in the region of the further aperture 7.
On the other hand, the fixed connection between the hollow shaped part 2 and the reinforcing element in the region of the apertures 6 or 7 can be provided by a mechanical connection such as for example by cramping, stamping or squeezing. Alternatively, the fixed connection can be also produced by a combination of a thermal connection process and a mechanical connection.
The reinforcing element 5 is arranged in highly loaded regions of the hollow shaped part 2, for example in the regions in which the hollow shaped part 2 can be subjected to buckling or bending. An increase of the strength of the hollow shaped part 2 can be also provided in other regions where it is required.
It is believed to be understood that also several reinforcing elements can be also provided in the longitudinal direction of the hollow shaped part 2. Therefore the hollow shaped part 2 is provided with a reinforcing element in the highly loaded regions, while the less loaded regions remain free to achieve a further weight reduction. Moreover, for saving the material and thereby for reducing the weight of the vehicle structural component 2, the reinforcing element 5 in a not shown manner can be reducing in a diamond shape at its free ends in the longitudinal direction of the reinforcing element 5, in the inner space 4 of the hollow shaped part 2. The reinforcing element 2 completely extends through the inner space 4 of the hollow shaped part 2 not over its total length.
For providing an especially effective reinforcement of the hollow shaped part 2, the reinforcing element 5 is arranged in the inner space 4 of the hollow spaced part 2, or its orientation in the hollow shaped part 2 is provided so that, in dependence on the selected profile, the maximum resistance moment of the reinforcing element 5 counteracts the maximum stress or load of the hollow shaped part 2.
In the shown embodiments the above described device 3 increases a buckling strength of an A-support, in particular in the region of the buckling or the mirror triangle of a vehicle body. This is achieved in that a simply designed reinforcing element 5 or a central web for reinforcement is introduced in the A-support.
The above described embodiment of a vehicle structural component with a reinforcement element is advantageous over the conventional reinforcements, since with at least the same buckling strength it has a substantially reduced width. Moreover, a reduction of a membrane action is provided which otherwise can cause buckling in of the outer surfaces of the hollow shaped part 2, in particular under the action of a bending load.
The device for increasing the strength of a hollow component with a closed cross-section for a vehicle body can be used naturally for all crash-responsive regions of the closed hollow profiles, as well as for components of a vehicle body which require increased strength, such as for example safety belt connections. Further applications include also those regions of the vehicle body which require stiffness, such as for example cable knots susceptible to torsion, as well as longitudinal supports which are subjected to a bending stress.
The device in accordance with the present invention can have an additional reinforcing element 5, as shown in FIG. 9.
While the invention has been illustrated and described as embodied in device for increasing strength of a hollow shaped part of a vehicle body, it is not intended to be limited to the details shown, since various modifications and structural changes may be made without departing in any way from the spirit of the present invention.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS2965414 *Nov 28, 1958Dec 20, 1960Gen Motors CorpVibration dampening vehicle frame constructionUS4563035 *Apr 4, 1984Jan 7, 1986Mazda Motor CorporationAutomobile rear body structureUS4682812 *Jun 11, 1986Jul 28, 1987Ford Motor CompanyMotor vehicle body side wallUS4826238 *Nov 30, 1987May 2, 1989Honda Giken Kogyo Kabushiki KaishaSide sill for automotive vehicleUS5810428 *Jan 30, 1997Sep 22, 1998Nissan Motor Co., Ltd.Framework of vehicle body structureUS6302478 *Mar 3, 2000Oct 16, 2001Cosma International Inc.Hydroformed space frame joints thereforUS6402414 *Mar 7, 2000Jun 11, 2002General Motors CorporationEfficient tubular body jointUS6412857 *Aug 17, 2001Jul 2, 2002Cosma International Inc.Hydroformed space frame and joints thereforUS20030184109 *Jun 29, 2001Oct 2, 2003Lars-Olof HellgrenMethod for producing a structural element with a reinforced bend and a structural elementDE19518946A1May 23, 1995Nov 30, 1995Honda Motor Co LtdStructural element of vehicle constructed of alloy platesDE19710894A1Mar 15, 1997Sep 17, 1998Opel Adam AgWall structure for door side frameJPH0446875A * Title not availableJPH02200580A * Title not availableJPS6116175A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7726442 *Jul 11, 2007Jun 1, 2010Sika Technology AgBaffle equipped with flap assemblyUS8474870Apr 27, 2012Jul 2, 2013Honda Motor Co., Ltd.Vehicle frame assemblyUS20080012390 *Jul 18, 2007Jan 17, 2008Benteler Automobiltechnik GmbhStructural part for the body or undercarriage of a motor vehicleUS20090078495 *Jul 11, 2007Mar 26, 2009Sika Schweiz AgBaffle equipped with flap assembly* Cited by examinerClassifications U.S. Classification296/205, 296/193.06, 296/30International ClassificationB62D25/04Cooperative ClassificationB62D25/04European ClassificationB62D25/04Legal EventsDateCodeEventDescriptionJul 30, 2002ASAssignmentOwner name: WILHELM KARMANN GMBH, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:DOGAN, HAMDI;WESS, RAINER;EXNER, MARKUS;REEL/FRAME:013129/0835Effective date: 20020619Sep 20, 2007FPAYFee paymentYear of fee payment: 4Nov 30, 2011SULPSurcharge for late paymentYear of fee payment: 7Nov 30, 2011FPAYFee paymentYear of fee payment: 8Sep 18, 2014ASAssignmentOwner name: VALMET AUTOMOTIVE OY, FINLANDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WILHELM KARMANN GMBH;REEL/FRAME:033765/0445Effective date: 20130403Dec 18, 2015REMIMaintenance fee reminder mailedMay 11, 2016LAPSLapse for failure to pay maintenance feesJun 28, 2016FPExpired due to failure to pay maintenance feeEffective date: 20160511RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services