DE102012018194A1 - Support and guide system for main portion of motor car chassis, has support and guide element which is slidably engaged with holding zone through insertion opening to perform sliding transition of holder of main portion of chassis - Google Patents

Abstract

The system (1) has a holder which is fixed at one end region of a motor car chassis. A support and guide element (6) is arranged at other end region of the motor car chassis. The support and guide element is provided to perform sliding transition of holder of a main portion (2) of motor car chassis. The support and guide element is slidably engaged with a holding zone (7) through an insertion opening (8).

Description

It is described a holding and guiding system of a body part on a motor vehicle chassis.

From the publication DE 10 2006 028 591 A1 An arrangement of a body part on a support part of a motor vehicle is known. In the known arrangement, the body part comprises at least one mounting opening through which a fastening means having a head is guided to fix the body part to the support part. In the mounting opening at least one sliding part is arranged, on which the body part rests in sections, and wherein the body part is slidably fixed by the sliding member and the head of the fastening means to the support member of the motor vehicle.

In this case, the mounting opening, in which the sliding element is arranged, is substantially rectangular in shape and, accordingly, the shape and construction of both the sliding element and the fastening means are adapted to the rectangular shape of the mounting opening, so that the mounting possibilities and possible uses are clearly limited and there is no possibility of push the body part onto the fastener.

This mounting and alignment restriction also applies to a second arrangement of a body part on a support of a motor vehicle, which is known from the document DE 10 2005 057 603 A1 is known. In this arrangement, the body part has a mounting flange with at least one through hole. On the other hand, the support part has a mounting surface with at least one mounting hole, on which the mounting flange rests at least in sections. A fastener extends through the through-hole and engages the mounting hole, the through-hole and the fastener being shaped such that the fastener is mountable with respect to the through-hole in two mounting positions in which the fastener provides a stop for the body panel in that manner forms that in a first mounting position a greater thermal expansion of the body part is made possible than in a second mounting position.

Thus, it is not possible in this known arrangement, postpone the body part on the fastener, but it must rather the body part via corresponding screw, which provides the fastener available to be slidably fixed to the support member, so that in this solution several elements for a slidable fixing a body part on a support member aligned with each other and must be screwed together. For this purpose, it is necessary to realize the screw at the intended places.

It must a plurality of mounting elements with a screw, a nut and a slider be held and assembled in place, that is in the manufacturing process of the vehicle, assembled, adjusted to each other and finally connected to slidably a body part with a support member of a vehicle connect. A pre-assembly of zusammenzustellenden elements for such an arrangement of a body part on a support member of a vehicle to delay only in the final assembly of a body part with a few simple steps, the body part on corresponding sliding points, is practically not feasible with the known solutions.

The object of the invention is to provide a holding and guiding system for a body part on a motor vehicle chassis, which can be prefabricated and provided, so that in the final assembly a quick and cost-effective installation of the body part to the vehicle chassis is possible.

This object is achieved with the subject matter of independent claim 1. Advantageous developments of the invention will become apparent from the dependent claims.

With one embodiment of the invention, a holding and guiding system for a body part is created on a motor vehicle chassis. The holding and guiding system has a holder which is fixed to the motor vehicle chassis with a first end region and has a holding and guiding element on a second end region. The holding and guiding element forms a slidable transition from the holder to the body part. The body part has a holding zone, which is slidably engaged with the holding and guiding element, wherein the holding zone has an insertion opening via which the holding and guiding element with the holding zone in a slidable engagement can be brought.

An advantage of this holding and guiding system for a body part on a motor vehicle is that the body part only at one point, at the so-called fixed point, for example, has to be connected via a holder to the chassis. A space-stable three-point suspension of the body part on the motor vehicle chassis requires two further holding points in spaced positions of the body part to such a three-point suspension of the body part to ensure the vehicle chassis. The two further stopping points must also ensure that they allow thermal expansion of the body part without arching or tipping it from the anchor point and allowing both in the factory and later in the operation of the vehicle, a tension-free three-point suspension of the body part on the motor vehicle chassis, in the at least two holding positions of the holding and guiding system according to the invention compensate for any thermal expansion difference of the body part relative to the vehicle chassis slidable. Thus, at the same time the life and service life of both the body part and the vehicle is increased, since it can not lead to tearing or tearing off the fix or breakpoints due to thermal loads on the motor vehicle chassis and the body part.

Particularly high are such loads in the context of manufacturing, when it comes to the married to the vehicle body in a dip painting temporarily suspend a high temperature to evenly apply the thermosetting paint, and then cool the entire body structure together with the chassis to room temperature to then carry out further assembly work. In these thermal loads of a hot-dip bath, different coefficients of expansion of plastics and metals are noticeable, wherein usually the chassis is made of a different metal alloys, while a majority of today's body parts such as fenders, shock absorbers, etc. have plastic materials.

Due to the slidable attachment using the holding and guiding system for a body part of the present invention, are used in the slidable holding and guiding elements, these problems are overcome due to different expansion coefficients of different materials in automotive engineering.

In one embodiment of the invention, the holding and guiding element has a holding and guiding head, which is adapted to the insertion opening of the holding zone of the body part and has a smaller outer diameter than an opening diameter of an insertion hole of the insertion opening. By this design of the insertion opening with a relatively large opening diameter insertion of a holding and guiding head of the holding and guiding element, which is fixed on the rigid holder of the vehicle chassis, easily possible in the insertion opening of a holding zone of the body part.

Since in a further embodiment of the invention, the insertion opening of the holding zone of the body part from the insertion hole of the insertion opening merges into a guide long hole, it is possible in an advantageous manner that now the body part is pushed into this region of the attachment to its final position, wherein the guide slot of the Holding zone of the body part slidably holds the holding and guiding head of the holding and guiding element on the second end of the rigid holder without any screwing or riveting mechanism in position.

For this purpose, it is further provided that the guide slot of the insertion opening of the holding zone is aligned with respect to the holding and guiding element of the rigid holder such that a slidable mounting of the holding zone of the body part with respect to the associated holding and guiding head of the insertion hole of the insertion opening the holding zone of the body part in the guide slot of the holding zone unhindered up to at least one locking element in an end position of the body part on the motor vehicle chassis or the rigid holder is possible.

In this case, the body part may have as a locking element at least one snap hook or at least one latching lug, which cooperates with a projection on the rigid holder. By means of such snap hooks and detents in the region of the insertion opening in the holding zone of the body part, two fundamentally different assembly methods are possible. On the one hand, the rigid holder can be preassembled with the holding and guiding element in the holding zone of the body part while snapping the snap hooks or with engagement of the latching lugs on the holder.

In the production line then the pre-assembled holder can be welded to the vehicle chassis, riveted or screwed. However, this mounting option and this production process are not so cost-effective, as if first the rigid holder or the rigid holder are fixed to the vehicle chassis, either by welding, screwing or riveting. A holding and guiding element can then be mounted in the second region of the holder at the positions at which a body part is to be pushed on in a simple manner in the production sequence. Only at a single fixing position a fixed point is fixed in its final position using, for example, a Fixiernietes, a fixing screw or a fixing bolt of a three-point hitch.

In a further embodiment of the invention, the holding and guiding element has a connecting bolt, which holds the holding and guiding head on the second end region of the rigid Holder fixed at a distance from the motor vehicle chassis, wherein the distance of the material thickness of the holding zone of the body part corresponds, in such a way that a slidable movement between the second end portion of the rigid holder and the holding and guiding head for the holding zone of the body part is ensured. This distance can also be adapted to extreme material thicknesses, as are customary for plastic body parts. The connecting bolt itself may be fixed as a blind rivet on the second end region of the rigid holder or be applied by means of a screw connection to the second end region of the rigid holder.

Furthermore, it is provided that the holding and guiding element has a ring element which is rotatably mounted on the connecting pin and whose outer diameter is smaller than the outer diameter of the holding and guiding head, so that this ring element in the transition from the insertion hole of the holding zone of the body part can lead to the guide slot of the insertion opening a holding and guiding element in the guide slot, while the holding and guiding head prevents the body part in this breakpoint can be detached from the rigid holder or stand out from the rigid holder. For this purpose, the ring element has a ring thickness which corresponds to the material thickness of the holding zone of the body part such that the holding zone of the body part has a slidable fit to the holding and guiding head of the holding and guiding element.

It is particularly advantageous, as already mentioned above, if the body part for a three-point suspension only at a central point of the body part, for example, has a fixing point and arranged at the furthest from the fixing point areas of the body part, two widely spaced holding and guide elements slidably disposed are.

Furthermore, a plastic fender is provided as the body part, the holding zone is arranged in a recess of the fender and there has a material thickness which is significantly greater than the material thickness of an outer skin of the fender. To increase the stability of the mounting of the fender by the holding and guiding elements, the holding zone in the region of the holding and guiding elements is surrounded by a reinforcing wall. The reinforcing wall can then merge into the thinner outer skin of the fender. In this case, the reinforcing wall is at an angle to the holding zone on edges of the holding zone, wherein the holding zone has the insertion opening with the insertion hole and the guide slot.

The invention will now be explained in more detail with reference to the accompanying figures.

1 shows a schematic diagram of a plastic fender as the body part of the holding and guiding system according to an embodiment of the invention;

2 shows a plan view of a portion of the plastic fender according to 1 with engaging components of the holding and guiding system;

3 shows with 3A a side view of a rigid holder of the holding and guiding system and with 3B a side view of the rigid holder with partially cross-cut holding and guiding element of the holding and guiding system;

4 shows with 4A a rear view and with 4B a front view of the rigid holder with a fixed holding and guiding element in the second end region of the holder;

5 shows a schematic cross section through the holding and guiding element on the second end portion of the rigid holder.

1 shows a schematic diagram of a plastic fender 15 as a body part 2 a holding and guiding system 1 according to an embodiment of the invention. The holding and guiding system 1 should the plastic fender 15 with a three-point hitch to a vehicle chassis made of a metal alloy, such as iron or aluminum alloy, fix. However, the thermal expansion differences between a metal chassis and a plastic body panel are significant and affect in all directions.

To indicate the directions is in 1 a Cartesian coordinate system shown, with the direction of travel x, the vertical direction z and the transverse direction y. The front fender shown here is an elongated L with a horizontal leg 24 in the direction of travel x and a vertical leg in the direction z. In this first embodiment of the holding and guiding system, the leg is at the crossing point 24 and 25 a fixed point 14 set, from which the legs 24 and 25 expand on the one hand in the longitudinal direction x and on the other hand in the vertical direction z under thermal stress, which expansion is usually greater in plastic than the extent of the motor vehicle chassis.

The plastic fender 15 as a body part 2 should by means of two further breakpoints 26 and 27 of the holding and guiding system 1 be held on the motor vehicle chassis, without being thermal stresses affect such that the plastic material of the plastic fender 15 at the breakpoints 26 and 27 tears or otherwise damaged. That's why the plastic mudguard points 15 in the breakpoints 26 and 27 retention zones 7 on, with one guide slot each 11 , The respective leadership long hole 11 is on the fixed point 14 aligned to the plastic fender 15 or the material of the plastic fender 15 in the guide long hole 11 yielding and slidable under thermal stress can lead.

In addition, the guide have long holes 11 at the breakpoints 26 and 27 in the holding zones 7 insertion holes 10 on, which merge into the guide slots and together each have an insertion opening 8th for a holding and guiding element, which is mechanically connected to the motor vehicle chassis forms. The horizontal thigh 24 is inclined relative to the direction of travel x by an angle α and the vertical leg 25 is inclined to the vertical direction z by an angle β, these inclinations of the structure of the plastic fender and the position of the fixed point 14 opposite the breakpoints 26 and 27 depends.

To stabilize the holding zones 7 the plastic mudguard with the insertion openings 8th The material in this area may be stronger than the plastic outer skin 17 of plastic mudguard 15 , In addition, the holding zones 7 be surrounded by reinforcing plastic walls, so that the holding zones 6 in a depression 16 are arranged and the surrounding reinforcement walls 18 form the edges of the depression.

2 shows a plan view of a portion A of the plastic fender 15 according to 1 with engaging components of the holding and guiding system 1 , This magnification A shows, on the one hand, on the left side of the 2 the outer skin 17 of the fender and transverse thereto against the transverse direction y a fender flange, with a holder 3 via a holding and guiding element 6 slidably connected. This is a holding and guiding head 9 of the holding and guiding element 6 in an insertion opening 10 introduced and in the leadership long hole 11 slidably mounted. The diameter of the insertion hole 10 is therefore greater than the outer diameter d of the holding and guiding head 9 of the holding and guiding element 6 , In addition, the shows 2 that the holding zone 7 in a depression 16 the side flange of the plastic mudguard 15 is arranged and reinforcing walls 18 partially surrounded.

3 shows with 3A a side view of a rigid holder 3 of the holding and guiding system 1 , where the rigid holder 3 a first end area 4 has, with which the rigid holder can be fixed or fixed to the motor vehicle chassis, and a second end portion 5 with which the holding and guiding element 6 is fixed. The holding and guiding element in turn has a retaining guide head 9 on top of that 28 of the rigid holder 3 spaced apart. This distance corresponds to the thickness s of the plastic in the holding zone 7 of plastic mudguard 15 , From this strength s in the holding zone 7 and the associated deepening 16 the thickness of the plastic mudguard translates into a lower thickness h of the outer skin 17 of plastic mudguard. This transition can be in the reinforcement walls 18 which the holding zone 7 be surrounded, arranged.

Also shows 3A very clearly the order of magnitude of the diameter D of the insertion hole against the slightly smaller outer diameter d of the rigid holder 3 firmly connected, but spaced holding and guiding head 9 who in this position shown the 3A with the guide long hole 11 slidably engaged.

3B shows a side view of the rigid holder 3 of the holding and guiding system 1 with a partially schematic cross section through the holding and guiding element 6 of the holding and guiding system 1 , This cross-section shows that the holding and guiding head 9 in a connecting bolt 12 passing through an appropriate hole 29 in the rigid bracket 3 is inserted through it and riveted to a blind rivet or by a self-locking mother 19 at a distance r to the surface 28 the holding device is fixed. This distance r is ensured by a ring element, which is the connecting bolt 12 surrounds and has a strength r. The thickness r of the ring element is dimensioned such that it corresponds to the material thickness s of the plastic material in the region of the holding zone 7 corresponds and a sliding movement of the plastic fender relative to the holder 3 allows. The outer diameter w of the ring element 13 is the width b of the guide slot 11 of the insertion opening 8th adapted, as well as in 2 you can see.

4 shows with 4A a rear view and with 4B a front view of the rigid holder 3 with fixed holding and guiding element 6 in the second end area 5 of the owner 3 , wherein the respective front and back of the holding and guiding element 6 you can see. It is in 4A on the back the self-locking mother 19 on the connecting bolt 12 arranged. Instead of such a self-locking nut can also be designed to save space of the connecting bolt as a blind rivet.

In 4B is the holding and guiding head of the holding and guiding element 6 to see. In this embodiment of the rigid holder 3 this is designed as an angle, as it already is 3 shows, wherein the angle has two legs. Here is a first leg with a first end portion 4 , like it 3 shows, firmly connected to the vehicle chassis, which connection may be a weld, a screw or a riveted joint. The second leg has the second end region 5 with the holding and guiding element 6 on, the indentations or beads 20 and 21 possesses the rigidity of the elbow as a rigid holder 3 strengthen.

5 shows a schematic cross section through the holding and guiding element 6 on the second end area 5 of the rigid owner 3 , The holding and guiding head 9 of the holding and guiding element 6 goes into a connecting bolt 12 over, with a thread 22 through the hole 29 in the holder 3 is pluggable, so on the thread 22 a self-retaining mother 19 can be screwed to the holding and connecting head 9 using a ring element 13 at a fixed distance r, which is the thickness of the ring element 13 corresponds to hold, so that with this distance r can be ensured that the plastic material in the holding zone of the plastic fender sliding with the top 28 and the holding and guiding head 9 can interact. In the center of the holding and guiding head 9 can be an allen wrench recording 23 be arranged to the torque when screwing the self-locking nut 19 on the thread 22 counteract.

Although at least one exemplary embodiment has been shown in the foregoing description, various changes and modifications may be made. Said embodiments are merely examples and are not intended to limit the scope, applicability or configuration of the screw with guide element in any way. Rather, the foregoing description provides those skilled in the art with a plan for practicing at least one exemplary embodiment of the guide screw wherein numerous changes in the function and arrangement of the guide screw may be made to elements described in exemplary embodiments without departing from the scope of the appended claims Claims and their legal equivalents.

LIST OF REFERENCE NUMBERS

1

Holding and guiding system

2

body part

3

holder

4

first end area

5

second end area

6

Holding and guiding element

7

holding zone

8th

insertion opening

9

Holding and guiding head

10

insertion hole

11

Guide slot

12

connecting bolts

13

ring element

14

fixed point

15

Plastic fenders

16

deepening

17

Outer skin of the fender

18

Reinforcement wall of the holding zone

19

mother

20

Beading

21

Beading

22

thread

23

Allen key recording

24

leg

25

leg

26

halt

27

halt

28

top

29

drilling

a

distance

b

Width of the guide slot

D

Opening diameter of the insertion hole

d

Outer diameter of the holding and guiding head

H

Material thickness of the outer skin of the plastic mudguard

s

Material thickness of the holding zone

r

Ring thickness of the ring element

w

Outer diameter of the ring element

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 102006028591 A1 [0002]
• DE 102005057603 A1 [0004]

Claims (10)

Holding and guiding system ( 1 ) for a body part ( 2 ) on a motor vehicle chassis with a holder ( 3 ), which has a first end region ( 4 ) is fixed to the motor vehicle chassis and on a second end region ( 5 ) a holding and guiding element ( 6 ), wherein the holding and guiding element ( 6 ) a slidable transition from the holder ( 3 ) to the body part ( 2 ), and wherein the body part ( 2 ) a holding zone ( 7 ), which is slidable with the holding and guiding element ( 6 ) and wherein the holding zone ( 7 ) an insertion opening ( 8th ) via which the holding and guiding element ( 6 ) with the holding zone ( 7 ) can be brought into a slidable engagement. Holding and guiding system according to claim 1, wherein the holder ( 3 ) is fixed as a rigid holder on the motor vehicle chassis and the holding and guiding element ( 6 ) a holding and guiding head ( 9 ), which of the insertion opening ( 8th ) of the holding zone ( 7 ) of the body part ( 2 ) is adapted and a smaller outer diameter (d) than an opening diameter (D) of a insertion hole ( 10 ) of the insertion opening ( 8th ) having. Holding and guiding system according to claim 1 or claim 2, wherein the insertion opening ( 8th ) of the holding zone ( 7 ) of the body part ( 2 ) from the insertion hole ( 10 ) of the insertion opening ( 8th ) out into a guide slot ( 11 ) passes over. Holding and guiding system according to claim 3, wherein the guide slot ( 11 ) of the insertion opening ( 8th ) of the holding zone with respect to the holding and guiding element ( 6 ) of the rigid holder ( 3 ) is aligned such that a slidable mounting of the body part with respect to the holding and guiding head ( 9 ) from the insertion hole ( 10 ) of the insertion opening ( 8th ) of the holding zone ( 7 ) of the body part ( 2 ) in the guide slot ( 11 ) of the holding zone ( 7 ) unhindered up to at least one locking element in an end position of the body part ( 2 ) is possible on the motor vehicle chassis or the rigid holder, wherein the body part ( 2 ) has as latching element at least one snap hook or at least one latching lug, which with a projection on the rigid holder ( 3 ) interact. Holding and guiding system according to one of claims 2 to 4, wherein the holding and guiding element ( 6 ) a connecting bolt ( 12 ) having the holding and guiding head ( 9 ) on the second end region ( 5 ) of the rigid holder ( 3 ) fixed at a distance to the motor vehicle chassis, wherein the distance (a) of the material thickness (s) of the holding zone ( 7 ) of the body part ( 2 ) corresponds. Holding and guiding system according to claim 5, wherein the holding and guiding element ( 6 ) a ring element ( 13 ), which on the connecting bolt ( 12 ) is rotatably mounted and whose outer diameter (w) is smaller than the outer diameter (d) of the holding and guiding head ( 9 ), and whose ring thickness (r) of the material thickness (s) of the holding zone ( 7 ) of the body part ( 2 ) such that the holding zone ( 7 ) of the body part ( 2 ) a slidable fit to the holding and guiding head ( 9 ) of the holding and guiding element ( 6 ) having. Holding and guiding system according to one of the preceding claims, wherein the holding and guiding system ( 1 ) at least two holding and guiding elements ( 6 ) for a partially slidable holding a body part ( 2 ) on a motor vehicle chassis and at least one of the at least two holding and guiding elements ( 6 ) spaced fixation point ( 14 ), the body part ( 2 ) fixed to the vehicle chassis has. Holding and guiding system according to one of the preceding claims, wherein the body part ( 2 ) a plastic fender ( 15 ). Holding and guiding system according to claim 8, wherein the holding zone ( 7 ) in a depression ( 16 ) of the fender ( 15 ) and has a material thickness (s) which is greater than the material thickness (h) of an outer skin ( 17 ) of the fender ( 5 ). Holding and guiding system according to one of the preceding claims, wherein the holding zone ( 7 ) of a reinforcing wall ( 18 ) is partially surrounded.

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