DE102016221726A1 - Vehicle roof rack foot, hereof equipped roof rack and hereby equipped motor vehicle - Google Patents

Abstract

For the purpose of reduced air resistance of a roof rack (5) for a motor vehicle (1) is a vehicle roof support foot (10, 10 '), with
a crossbeam receptacle (30, 30 ') which is adapted to receive a crossbeam (40) of a roof rack (5),
a fixing portion (25, 25 ') adapted to be fixed to a roof rail (20) or a roof duct of a roof (3) of a motor vehicle (1), and
a connecting portion (35, 35 ') connecting the transverse support receptacle (30, 30') and the fixing portion (25, 25 '), wherein
the transverse support receptacle (30, 30 '), the connecting portion (35, 35') and the fixing portion (25, 25 '), viewed in the main driving direction (F) of the motor vehicle (1), each have an upstream front surface (45-1, 50 -1, 55-1) and a downstream rear surface (45-2, 50-2, 55-2) are provided, in which the respective front surface (45, -1, 50-1, 55-1) formed round is.

Description

The present invention relates to a vehicle roof rack according to claim 1, a roof rack according to claim 9 equipped therewith and a correspondingly equipped motor vehicle according to claim 10.

For carrying loads on roofs of motor vehicles roof racks are known. The loads, such as roof boxes, are attached to cross members of the roof rack, which in turn are mounted by vehicle roof carrier feet on roof rails or roof channels of the respective vehicle roofs. Corresponding examples are from EP 2 017 129 A2 , of the EP 2 746 108 A1 , of the WO 2010/030198 A1 , of the DE 20 2012 012 771 U1 and the EP 2 570 304 A1 known. To reduce the air resistance associated with these known roof carriers an aerodynamic design of the respective cross member is provided, as is apparent from the three last-mentioned prior art documents.

It is an object of the present invention to provide means by which the air resistance of a roof rack can be further reduced.

This object is achieved by a Fahrzeugdachträgerfuß with the features of claim 1. Advantageous developments of the inventions are contained in the subclaims.

The Fahrzeugdachträgerfuß is characterized in that the respective front surface is round. As a result, the air resistance of the vehicle roof support foot according to the invention over known vehicle roof support feet is reduced in an advantageous manner. The term "round" should not be interpreted too narrowly, as it generally refers to an arcuate section. Thus, the cross member receiving, the connecting portion and the fixing portion on its front surface on an arcuate portion. Arc length and radius of curvature of the front surface, viewed over the entire front surface, in each case be formed constant or variable in the cross member recording. The same applies to the arc lengths and Bogenradii of connecting portion or mounting portion in the region of the front surface. In addition, the arc lengths and / or Bogenradii the cross member receptacle, the connecting portion and the attachment portion may each be alone, partially or in all the same or different.

According to a preferred embodiment, the respective front surface of the cross member receiving, connecting portion and mounting portion is formed larger than the respective rear surface, so that the air resistance of the Fahrzeugroachträgerfußes is further reduced.

According to the principle, the respective rear surfaces of the cross member receptacle, the connecting portion and / or the attachment portion may be formed round. Also in this case, the term "round" is not to be interpreted too narrowly and generally refers to an arcuate section. Thus, the cross member receiving, the connecting portion and the fixing portion on its respective rear surface on an arcuate portion. Arc length and radius of curvature of the back surface, viewed over the entire rear surface, may be formed constant or variable in the cross member recording. The same applies to the arc lengths and Bogenradii of connecting portion or mounting portion. In addition, the arc lengths and / or Bogenradii the cross member receptacle, the connecting portion and the mounting portion on the rear surface each alone, partially or in all the same or different.

According to a preferred embodiment, it is provided that at least one rear surface is flat. As a result, an aerodynamic spoiler edge is formed in an advantageous manner, so that the aerodynamic drag of the vehicle roof carrier foot according to the invention, as viewed in the main travel direction, is further reduced. In addition, a vehicle roof rack foot designed according to the invention is in operation, i. during a movement of a suitably equipped motor vehicle, quieter than corresponding devices known from the prior art.

The aerodynamic drag of the vehicle roof support foot according to the invention, as viewed in the main driving direction, is further reduced if its slenderness, ie the quotient of its length to thickness in a certain cross-sectional plane, essentially has the following relationship: $$1.2\le \mathrm{\lambda }\le 3.5$$

According to a preferred embodiment, the attachment portion and the cross member receiving from each other different degrees of slimming. Thus, the slenderness level of the attachment portion 1.3 and the slenderness level of the crossbar support 3.5 in a particularly preferred embodiment.

Advantageously, the front surface of the attachment portion, the front surface of the cross member receptacle and / or the front surface of the connecting portion are rounded and each have a rounding radius R. According to a preferred embodiment, the following essentially applies: $$10\le \text{R}\le \text{40}$$

This rounding radius R may, but not necessarily, be the same for the components mentioned. In a particularly advantageous manner, the radius of curvature of the transverse beam receptacle is substantially 10 mm and the rounding radius of the foot is substantially 40 mm.

According to a further preferred embodiment, the vehicle roof carrier foot is characterized in that the front surface has a rounding radius R and the vehicle roof carrier foot has a length I such that $$0.15\le \text{R / l}\le \text{0}\text{, 4}$$

This ratio may, but not necessarily, be the same at the attachment portion, the cross member support, and / or the connecting portion.

In an advantageous manner, the vehicle roof support foot is characterized in that the front surface has a width b and the rounding radius R substantially with the following relationship. $$0.45\le \text{R / b}\le \text{0}\text{, 5}$$

This ratio may, but not necessarily, be the same at the attachment portion, the cross member support, and / or the connecting portion. In a particularly advantageous manner, the ratio R / b of the cross member receiving substantially 0.45 and that of the attachment portion is substantially 0.5.

According to a preferred embodiment, the attachment lug, the cross member receptacle and / or the connecting portion tapers downstream from their respective front surface. The taper, that is to say the ratio of the length of the said components at the point x at which the indentation begins, to the width d of which at this point, is characterized in the usual way by the following relationship: $$1\le \text{x / d}\le \text{3}$$

This ratio may, but not necessarily, be the same at the attachment portion, the cross member support, and / or the connecting portion. In a particularly advantageous manner, the ratio x / d of the cross member receiving substantially 3 and that of the attachment portion is substantially 1.

The above object is also achieved by a roof rack with a vehicle roof support foot of the type previously disclosed. The advantages mentioned above apply adequately.

The above object is also achieved by a motor vehicle having a roof rack of the previously disclosed type. The advantages mentioned above apply adequately.

• 1 zeigt einen Ausschnitt eines erfindungsgemäßen Kraftfahrzeuges mit einem in perspektivischer Schrägansicht dargestellten erfindungsgemäßen Dachträger.
• 2 zeigt eine erste Ausführungsform eines erfindungsgemäßen Fahrzeugdachträgerfußes in perspektivischer Schrägansicht von vorne.
• 3 zeigt eine zweite Ausführungsform eines erfindungsgemäßen Fahrzeugdachträgerfußes in perspektivischer Ansicht von unten.

Hereinafter, with reference to the attached figures, a detailed, non-prejudicial, in particular limiting, description of embodiments of the present invention.

• 1 shows a section of a motor vehicle according to the invention with a roof carrier according to the invention shown in perspective oblique view.
• 2 shows a first embodiment of a vehicle roof support according to the invention in a perspective oblique view from the front.
• 3 shows a second embodiment of a vehicle roof support foot according to the invention in a perspective view from below.

The following is with reference to 1 to 3 a detailed, non-prejudicial, in particular limiting, description of embodiments of the present invention. Identical elements are provided with identical reference numerals, unless stated otherwise.

In 1 is a motor vehicle according to the invention 1 with an inventive, on a roof 3 mounted roof rack 5 shown. The main driving direction F of the motor vehicle 5 is symbolized by the corresponding arrow. Consequently, there are the front not shown here V or rear area H of the motor vehicle 1 as well as its right vehicle side S or left side of the vehicle B according to the in the 1 designated places.

The roof rack 5 has two vehicle roof carrier feet in a conventional manner 10 15 at two spaced apart, on the right and left side of the vehicle S respectively. B located roof rails 20 (of the only the main driving direction F right roof rail 20 is shown) are attached. It is understood that a fastening can also be done on a roof duct, not shown here.

Each vehicle roof rack foot 10 respectively. 10 ' has a mounting portion 25 respectively. 25 ' , a crossbeam receptacle 30 respectively. 30 ' and one the attachment portion 25 respectively. 25 ' each with the crossbar support 30 respectively. 30 ' connecting connecting section 35 respectively. 35 ' on. The attachment sections 25 . 25 ' are in a conventional manner to the roof rails 20 (or the roof duct, not shown here) attached. The two crossmember shots 30 respectively. 30 ' take in a conventional manner a cross member 40 on, on which a load, not shown here, for example a roof box, can be mounted.

2 shows a first embodiment of a vehicle roof support foot according to the invention 10 in perspective oblique view from the front. Starting from the main direction of travel F This is made of air (which symbolically through a stream of thread v is shown) flowed. On the upstream side, the vehicle roof carrier foot comprises 10 a front surface 45-1 at the attachment portion 25 , a front surface 50-1 at the crossbeam receptacle 30 and a front surface 55-1 at the connecting portion 35 , On the downstream side, the vehicle roof carrier foot comprises 10 a back surface 45-2 at the attachment portion 25 , a back surface 50-2 at the crossbeam receptacle 30 and a back surface 55-2 at the connecting portion 35 ,

Each of the front surfaces 45-1 . 50-1 and 55-1 is formed round in the direction of flow and has a rounding radius R, of which in this figure, due to the selected perspective, only the rounding radius R1 the front surface 55-1 and the rounding radius R2 the back surface 55-2 are recognizable. The upstream rounding radius R1 is greater than the downstream rounding radius R2 so the front surface 55-1 larger than the back surface 55-2 is. This applies mutatis mutandis to the other front surfaces 45-1 respectively. 50-1 and back surfaces 45-2 respectively. 50-2 ,

The transition from the attachment section 45-1 , Connecting section 35 in the direction of crossbar support 50-1 tapers in the z direction.

Again 2 can also be taken, is the maximum length of the cross member receptacle 30 equal to 1 while the maximum thickness thereof is d. In the chosen training example, the slimming degree λ , ie the quotient of I to d, 3.5, while the quotient of R1 to I is 0.1.

In 3 is a second embodiment of a Fahrzeugroachträgerfußes invention 10 shown in perspective view from below. Unlike the one in 2 The embodiment shown is the rear surface of the attachment portion 45-2 , the back surface 50-2 the cross member receiving and the rear surface of the connecting portion 55-2 provided with a sharp edge 45-3, 50-3 and 55-3, which act as demolition edges. These would be the respective rounding edges R2 so mathematically infinitely large. In the embodiment shown here, the degree of slimming is λ equals 1.3 while the quotient of R1 to I is 0.4.

It is understood that deviations from the embodiments shown, in particular with regard to their dimensions, for example, the length l, the thickness d and the radii of curvature R, can be provided. Thus, according to an advantageous embodiment, the length I a vehicle roof support foot 10 . 10 ' in the presence of a round back surface 45-2 . 50-2 . 55-2 be substantially 145 mm; in the absence of a round back surface 45-2 . 50-2 . 55-2 but presence of a spoiler lip 45-3 . 50-3 . 55-3 , the length is I essentially 100 mm, in both cases the maximum thickness being 70 mm.

In any case, however, the attachment portions 25 . 25 ' , Crossmember shots 30 . 30 ' and connecting sections 35 . 35 ' designed such that they each have a droplet shape viewed over their respective length, in which the respective front surface 45-1 . 50-1 respectively. 55-2 is round. Further, it is possible the respective attachment portions 25 . 25 ' , Crossmember shots 30 . 30 ' and connecting sections 35 . 35 not with a symmetrical profile but an asymmetrical profile.

• Abrundungsradius R1 der Querträgeraufnahme 50-1: 20 mm
• Abrundungsradius R2 des Befestigungsabschnittes 45-1: 40 mm
• Dicke d der Querträgeraufnahme 50-1: 20 mm
• Dicke d des Befestigungsabschnittes 45-1: 70 mm
• Länge I der Querträgeraufnahme 50-1: 75 mm
• Länge I des Befestigungsabschnittes 45-1: 100 mm
• Schlankheitsgrad λ der Querträgeraufnahme 50-1: 3,5
• Schlankheitsgrad λ des Befestigungsabschnittes 45-1: 1,3
• Einzug x/d der Querträgeraufnahme 50-1: 3
• Einzug x/d des Befestigungsabschnittes 45-1: 1

A particularly preferred embodiment of the present invention is characterized by relationships that are substantially as follows:

• radius of curvature R1 the crossbeam receptacle 50-1 : 20 mm
• radius of curvature R2 of the attachment section 45-1 : 40 mm
• thickness d the crossbeam receptacle 50-1 : 20 mm
• thickness d of the attachment section 45-1 : 70 mm
• length I the crossbeam receptacle 50-1 : 75 mm
• length I of the attachment section 45-1 : 100 mm
• slenderness ratio λ the crossbeam receptacle 50-1 : 3.5
• slenderness ratio λ of the attachment section 45-1 : 1.3
• collection x / d the crossbeam receptacle 50-1 : 3
• collection x / d of the attachment section 45-1 : 1

LIST OF REFERENCE NUMBERS

1

motor vehicle

3

top, roof

5

Car roof rack

10, 10 '

Fahrzeugdachträgerfuß

20

roof rails

25, 25 '

attachment section

30, 30 '

Crossbeam recording

35, 35 '

connecting portion

40

crossbeam

45-1

Front surface of the attachment section

45-2

Rear surface of the attachment portion

45-3

Edge on the attachment section

50-1

Front surface of the crossbeam receptacle

50-2

Rear surface of the cross member receptacle

50-3

Edge of the crossbeam receptacle

55-1

Front surface of the connecting portion

55-2

Rear surface of the connecting portion

55-3

Edge of the connecting section

B

left side of the vehicle

F

Main direction of travel of the motor vehicle

H

rear area

R1, R2

radius of curvature

S

right vehicle side

V

front area

d

thickness

I

Length of a vehicle roof support foot

v

Flow direction of the air

x, y, z

Axes of a known motor vehicle Cartesian coordinate system

λ

slenderness ratio

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2017129 A2 [0002]
• EP 2746108 A1 [0002]
• WO 2010/030198 A1 [0002]
• DE 202012012771 U1 [0002]
• EP 2570304 A1 [0002]

Claims (10)

A vehicle roof support foot (10, 10 '), comprising - a transverse support receptacle (30, 30') which is adapted to receive a cross member (40) of a roof rack (5), - a fixing section (25, 25 ') which is set up a roof rail (20) or a roof duct of a roof (3) of a motor vehicle (1) to be fastened, and - a connecting portion (35, 35 ') connecting the transverse beam receptacle (30, 30') and the mounting portion (25, 25 ') in which - the transverse support receptacle (30, 30 '), the connecting section (35, 35') and the fastening section (25, 25 '), viewed in the main direction of travel (F) of the motor vehicle (1), each have an upstream front surface (45). 1, 50-1, 55-1) and a downstream rear surface (45-2, 50-2, 55-2), characterized in that the respective front surface (45, -1, 50-1, 55-1 ) is round. Fahrzeugdachträgerfu ß (10, 10 ') after Claim 1 , characterized in that the respective front surface (45, -1, 50-1, 55-1) is larger than the respective rear surface (45-2, 50-2, 55-2) is formed. Vehicle roof support foot (10, 10 ') after Claim 1 or 2 , characterized in that at least one rear surface (45-2, 50-2, 55-2) is flat. Vehicle roof support foot (10, 10 ') according to one of the preceding claims, characterized in that it has a slenderness degree (λ) such that $$1.2\le \mathrm{\lambda }\le 3.5$$

Vehicle roof support foot (10, 10 ') according to one of the preceding claims, characterized in that the respective front surface (45-1, 50-1, 55-1) has a rounding radius R with the following relationship: $$10\le \text{R}\le \text{40}$$

Vehicle roof support foot (10, 10 ') according to one of the preceding claims, characterized in that the respective front surface (45, -1, 50-1, 55-1) has a rounding radius (R) and the vehicle roof support foot (10, 10') has a length (l) have such that $$0.15\le \text{R / l}\le \text{4}$$

Vehicle roof support leg (10, 10 ') according to one of the preceding claims, characterized in that the respective front surface (45, -1, 50-1, 55-1) has a width (b) and the radius of curvature (R) with the following relationship , $$0.45\le \text{R / b}\le \text{0}\text{, 5}$$

A vehicle roof support leg (10, 10 ') according to any one of the preceding claims, characterized in that the respective front surface (45, -1, 50-1, 55-1) has a taper x / d with the relationship: $$1\le \text{x / d}\le \text{3}$$

Roof carrier (5), characterized by a vehicle roof carrier foot (10, 10 ') according to one of the preceding claims. Motor vehicle (1), characterized by a roof rack (5) according to Claim 9 ,

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