DE202015104456U1 - Subframe for a motor vehicle - Google Patents

Abstract

Subframe for a vehicle for the articulation of suspension elements (22, 23) and for supporting a vehicle transverse direction (Y) extending stabilizer (24), with two spaced, in the vehicle longitudinal direction (X) extending longitudinal beams (2, 3) of at least one in the vehicle transverse direction (Y) extending cross member (4, 5) are connected, characterized in that the cross member (5) is a hollow profile part with a stabilizer (24) facing the cross member wall (31) extending at least one extending in the cross member longitudinal direction, to the interior of the Hollow profile facing indentation (30), in which the stabilizer (24) extends at least partially.

Description

The present invention relates to a subframe for a motor vehicle according to the preamble of claim 1.

Such subframes are usually formed by a frame construction of two parallel spaced apart longitudinal beams, which are connected in a frame-like manner by two likewise mutually parallel spaced cross members. The subframe is used in a conventional manner, for example, the connection of other wheel guiding handlebars, the handlebars are connected on the one hand with the subframe and on the other hand with a wheel-receiving wheel carrier. Likewise, the subframe for receiving further vehicle components, for example a transfer case, which is also known as an intermediate gear, differential or differential gear, can be used. The subframe can be connected as a whole with the vehicle body, wherein the subframe with a plurality, preferably four, bearings is attached to the vehicle body.

In a known manner, a vehicle-mounted, usually substantially U-shaped anti-roll bar, also referred to herein for a short time as a stabilizer, acts on the left and right side suspension of a motor vehicle axle, thereby allowing greater lateral inclinations of the vehicle body when cornering. Such a stabilizer is for example in the DE 10 2012 022 889 A1 disclosed.

In modern rear suspension of motor vehicles, the space available in the area of the rear subfloor is typically very limited. A variety of individual components, such as the suspension and / or the vehicle body is to accommodate there in a confined space.

For space-saving arrangement of a stabilizer on a subframe, it is for example from the DE 10 2013 011 562 A1 known to install a stabilizer on a designed as a hollow profile cross member of the subframe that the stabilizer extends at least partially within the cross member.

Nevertheless, the arrangement in a longitudinal direction of the vehicle, in particular a subframe of a rear suspension with a stabilizer system and a spare wheel well in the floor of the vehicle for receiving a full size spare wheel continues to result in significant problems.

From the CN 1944156 A For example, an underbody structure for improving the supporting rigidity of an auxiliary frame is known regardless of restrictions on an arrangement of a spare wheel well on a vehicle.

The JP 2009029197 A describes a subframe for the rear part of a vehicle, on the one hand allows an increase in the diameter of a spare wheel and on the other hand prevents the deformation of a fuel tank at a rear collision, or at least reduced.

Another rear body structure of a motor vehicle that pursues a similar object is disclosed in U.S.Pat CN 101778754 A disclosed.

A still further rear body structure of a vehicle, which take into account the competing demands for a maximum ground clearance and the largest possible cargo space, describes the JP 2011093344 A ,

Against this background, the present invention has the object to provide a subframe for a motor vehicle, in which the stabilizer is arranged space-saving.

This object is achieved by a subframe with the features of claim 1. Further particularly advantageous embodiments of the invention disclose the subclaims.

It should be noted that the features listed individually in the following description can be combined with one another in any technically meaningful manner and show further embodiments of the invention.

The description additionally characterizes and specifies the invention, in particular in connection with the figures.

According to the invention, a subframe for a vehicle, in particular a motor vehicle, for articulating suspension elements and for supporting a stabilizer extending in the vehicle transverse direction comprises two spaced-apart longitudinal members running in the vehicle longitudinal direction, which are connected by at least one cross member extending in the vehicle transverse direction. The cross member is a hollow profile part and has a stabilizer facing the cross member wall, which has at least one extending in the cross member longitudinal direction, facing the interior of the hollow profile indentation, in which the stabilizer extends at least partially. In this way, a space-favorable course of the stabilizer on the subframe, in particular on the cross member, allows. Since the stabilizer according to the invention does not run inside the hollow profile, but outside the cross member, is it is easily accessible for assembly, maintenance or visual inspection.

According to an advantageous embodiment of the invention, the cross member is formed closed in cross section, whereby optimum stability and rigidity of the cross member can be ensured.

A further advantageous embodiment of the invention provides that the stabilizer has a bulge corresponding to the recess of the cross member wall, which extends in the recess of the cross member wall. In other words, the bulge of the stabilizer protrudes into the recess of the cross member wall, so that in the region of the bulge of the stabilizer space for other components, such as the suspension and / or the vehicle body, can be created. The indentation of the cross member wall and the bulge of the stabilizer are geometrically designed such that the stabilizer can deform elastically without contact during operation.

According to yet another advantageous embodiment of the invention, the stabilizer is arranged with respect to a vehicle longitudinal direction behind the cross member provided with the indentation.

For the transmission of torsional moments on the stabilizer to compensate for rolling motions of the vehicle body this is preferably rotatably mounted in stabilizer bearings on the provided with the recess cross member wall. The stabilizer bearings may optionally be mounted within the indentation on the cross member wall. Alternatively, the stabilizer bearings can be connected to the outside of the recess of the corresponding cross member wall with this.

Particularly preferably, the cross member provided with the indentation is installed as a rear cross member in a rear axle subframe. In this case, can be created by the inventive course of the stabilizer on the cross member space for the arrangement, for example, a spare wheel well for receiving a full-size spare wheel.

The stabilizer may be in one embodiment, a one-piece, U-shaped stabilizer bar, which extends continuously in the vehicle transverse direction between the two sides of the vehicle and is articulated directly or indirectly to Radführungselementen a suspension.

Further features and advantages of the invention will become apparent from the following description of a non-limiting embodiment of the invention, which will be explained in more detail below with reference to the drawings. In these drawings show schematically:

1 a top view of an embodiment of a subframe according to the invention,

2 a rear view of the subframe off 1 and

3 a sectional view taken along the line AA in 2 ,

In the different figures, equivalent parts are always provided with the same reference numerals with respect to their function, so that these are usually described only once.

1 schematically shows a plan view of an embodiment of a subframe 1 for a vehicle (not shown) according to the invention. The forward direction of travel of the vehicle is in 1 indicated generally by F, a vehicle longitudinal direction with X, a vehicle transverse direction with Y and a vehicle vertical direction with Z (s. 2 ).

As 1 can be seen, includes the subframe 1 a left, extending in the vehicle longitudinal direction X longitudinal member 2 and a right, extending in the vehicle longitudinal direction X and the longitudinal member 2 spaced side members 3 , The side members 2 and 3 For example, they can be made by hydroforming sheet metal structures.

Furthermore, the subframe has 1 a front, in the vehicle transverse direction Y extending cross member 4 and a rear, in the vehicle transverse direction Y extending cross member 5 on which the side members 2 and 3 connect with each other. At the in 1 illustrated embodiment of the subframe 1 are the crossbeams 4 and 5 produced as hollow profile parts of conventionally shaped sheet metal structures. The trained as a hollow profile parts cross member 4 and 5 are at the in 1 illustrated embodiment of the subframe 1 formed with a closed cross-section. The side members 2 and 3 are stuck with the cross members 4 and 5 connected, for example, materially by welding.

To the subframe 1 in a vibration-isolated manner to the vehicle body (not shown) to be able to attach to the respective ends of the side members 2 and 3 cylindrical metal sleeves 6 . 7 . 8th and 9 firmly connected, for example by welding. rubber bushings 10 . 11 . 12 and 13 can into the cylindrical metal sleeves 6 . 7 . 8th and 9 be pressed in to the subframe 1 to isolate with respect to the vehicle body in terms of vibrations.

The in 1 illustrated subframe 1 is designed as a rear axle subframe and also has a rear drive unit 14 , For example, a differential gear, on, with the subframe 1 in a vibration-isolated manner by means of bearing bushes 15 . 16 . 17 and 18 connected is. A drive shaft 19 connects a arranged in the front portion of the vehicle engine (not shown) with gear unit (also not shown) with the rear drive unit 14 , axle shafts 20 and 21 are between the drive unit 14 and a left wheel carrier 22 or a right-hand wheel carrier 23 arranged.

As in 1 it can be seen further on the subframe 1 as well as a stabilizer bar 24 via stabilizer bearings 25 and 26 rotatably mounted. The stabilizer 24 is also at its ends via connecting bearings 27 and 28 each with the left or right wheel carrier 22 respectively. 23 connected. Alternatively, the stabilizer 24 with his connection bearings 27 and 28 also be attached to other suspension components, such as wishbones (not shown). At the in 1 illustrated embodiment of the subframe 1 is the stabilizer with respect to the vehicle longitudinal direction X behind the cross member 5 arranged.

Finally, as in 1 can be seen, in the underbody of the vehicle a spare wheel well 29 intended. The spare wheel well is behind the subframe with respect to the vehicle longitudinal direction X. 1 arranged.

2 represents a rear view of the subframe 1 out 1 In this view, it can be seen that in the rear cross member 5 an in transverse beam longitudinal direction, that is in the vehicle transverse direction Y, extending, to the interior of the hollow profile of the cross member 5 pointing dent 30 is provided, in which the stabilizer 24 partially runs (see, for example 1 ). In particular, the indentation 30 in the stabilizer 24 facing rear cross member wall 31 designed as a hollow profile cross member 5 educated.

3 represents a sectional view taken along the line AA in 2 In this view is clearly the indentation 30 in the rear cross member wall 31 the rear cross member 5 to recognize. Furthermore, the stabilizer 24 in the in the 1 to 3 illustrated embodiment of the subframe 1 one of the indentation 30 corresponding bulge 32 on, leaving the bulge portion of the stabilizer 24 in the dent 30 the rear cross member 5 runs. In particular, the bulge runs 32 of the stabilizer 24 both under static and under dynamic conditions always without contact in the indentation 30 of the crossbeam 5 ,

The 2 and 3 It can be clearly seen that the stabilizer bearings 25 and 26 outside the dent 30 at the cross member wall 31 the rear cross member 5 attached and connected to this.

In 3 it is good to see that the stabilizer 24 has a space-saving course on the subframe or on the cross member. In particular, the course of the stabilizer allows 24 on the subframe 1 the arrangement of the spare wheel well 29 behind the rear cross member 5 to accommodate a full size spare wheel without negatively affecting the dynamic behavior of the suspension.

The above-described subframe according to the present invention is not limited to the embodiment disclosed herein, but also includes similar other embodiments. So it is conceivable, for example, that the indentation extends to the cross member wall over its entire longitudinal dimension, in which the stabilizer could then extend along the entire cross member in the vehicle transverse direction. In this case, the stabilizer bearings would preferably be connected within the recess of the cross member wall with the cross member.

In a preferred embodiment, the subframe according to the invention is used as a rear axle subframe in a motor vehicle.

LIST OF REFERENCE NUMBERS

1

 subframe

2

 Left side member

3

 Right side member

4

 Front cross member

5

 Rear cross member

6

 metal sleeve

7

 metal sleeve

8th

 metal sleeve

9

 metal sleeve

10

 rubber bushing

11

 rubber bushing

12

 rubber bushing

13

 rubber bushing

14

 drive unit

15

 bearing bush

16

 bearing bush

17

 bearing bush

18

 bearing bush

19

 drive shaft

20

 axle shaft

21

 axle shaft

22

 Left wheel carrier

23

 Right wheel carrier

24

 anti-roll bar

25

 Left stabilizer bearing

26

 Right stabilizer bearing

27

 Left connection bearing

28

 Right connection camp

29

 spare wheel well

30

 indentation

31

 Rear cross member wall

32

 bulge

F

 Advancing direction

X

 Vehicle longitudinal direction

Y

 Vehicle transverse direction

Z

 Vehicle vertical direction

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

• DE 102012022889 A1 [0003]
• DE 102013011562 A1 [0005]
• CN 1944156 A [0007]
• JP 2009029197 A [0008]
• CN 101778754 A [0009]
• JP 2011093344A [0010]

Claims (7)

Subframe for a vehicle for the suspension of suspension elements ( 22 . 23 ) and for the storage of a vehicle transverse direction (Y) extending stabilizer ( 24 ), with two spaced apart, in the vehicle longitudinal direction (X) extending longitudinal beams ( 2 . 3 ), which extend from at least one cross member (Y) in the vehicle transverse direction (Y) ( 4 . 5 ), characterized in that the cross member ( 5 ) a hollow profile part with a stabilizer ( 24 ) facing cross member wall ( 31 ), which extends at least one extending in the cross member longitudinal direction, to the interior of the hollow profile facing indentation ( 30 ) in which the stabilizer ( 24 ) at least partially. Subframe according to claim 1, characterized in that the cross member ( 5 ) is formed closed in cross-section. Subframe according to claim 1 or 2, characterized in that the stabilizer ( 24 ) one of the indentations ( 30 ) of the cross member wall ( 31 ) corresponding bulge ( 32 ), which in the indentation ( 30 ) of the cross member wall ( 31 ) runs. Subframe according to one of the preceding claims, characterized in that the stabilizer ( 24 ) with respect to the vehicle longitudinal direction (X) behind that with the indentation ( 30 ) provided cross member ( 5 ) is arranged. Subframe according to the preceding claim, characterized in that the stabilizer ( 24 ) in stabilizer bearings ( 25 . 26 ) at the with the indentation ( 30 ) provided cross member wall ( 31 ) is rotatably mounted. Subframe according to one of the preceding claims, characterized in that the stabilizer bearings ( 25 . 26 ) outside the indentation ( 30 ) with the cross member wall ( 31 ) are connected. Subframe according to one of the preceding claims, characterized in that the with the indentation ( 30 ) provided cross member ( 5 ) as a rear cross member ( 5 ) in a rear axle subframe ( 1 ) is installed.

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