DE102022203018B4 - Bearing device with anti-slip surface, fastening arrangement and motor vehicle - Google Patents

Abstract

Storage device (1) for storing a first component (2) of a motor vehicle (3) on a second component (4) of the motor vehicle (3), comprising a first stop disk (5), a second stop disk (6) and one between the first stop disk (5) and the second stop disk (6) arranged spring device (7), wherein the first stop disk (5) for abutment on the first component (2) has a first outside (8) facing away from the second stop disk (6) and the second stop disk (6) has a second outside (9) facing away from the first stop disk (5) for contact with the second component (4), characterized in that the second outside (9) is used to inhibit relative rotation between the second stop disk (6) and the second component (4) is at least partially designed as an anti-slip surface (10) during an assembly process, the first component (2) being a subframe (11) of the motor vehicle (3) and the second component (4) being a body component (12) of the motor vehicle (3) is trained.

Description

The present invention relates to a storage device for storing a first component of a motor vehicle on a second component of the motor vehicle. The invention further relates to a fastening arrangement for supporting a first component of a motor vehicle on a second component of the motor vehicle and to a motor vehicle with a generic fastening arrangement.

Fastening arrangements are known in motor vehicle construction in which a first component, such as a subframe, is fastened to a second component, such as a body, via a fastening device, such as a bearing device designed as an auxiliary frame bearing. Such fastening devices are usually fixed to the respective components with screws and, for example, have a central bore with an internal thread on both sides.

By using subframe bearings, the subframe can be mounted elastically on the body. Known auxiliary frame bearings can, for example, be designed as metal-rubber bearings and have, for example, a rubber spring device with a longitudinal axis, which has a stop disk made of metal on both sides along the longitudinal axis. The stop disks can limit the spring travel of the subframe in the axial direction. According to further embodiments, further functions can also be integrated into the stop disks.

When manufacturing car bodies, anti-corrosion waxes are commonly used to protect the car bodies from corrosion. From a mass production perspective, such anti-corrosion waxes sometimes cannot be removed without leaving any residue. When installing the subframe on the body, such residues of the anti-corrosion waxes can reduce friction between the subframe bearing and the body in such a way that tightening the screw can cause a relative rotation of the stop disk and thus the subframe bearing to the body. Such a rotation is disadvantageous because, for example, an undesirable torsional stress can be introduced into the subframe bearing. Furthermore, such a rotation can change the position of a hole pattern in the stop disk in such a way that subsequent assembly steps for fixing components to the subframe bearing can no longer be carried out.

To avoid such twisting, various measures are already known by which, for example, the body is modified, such as sandblasting, coating or embossing a surface structure. In addition, additional friction disks are sometimes used, which are arranged between the body and the subframe bearing during assembly.

From the document DE 10 2015 012 869 A1 a fastening arrangement for fastening a plastic component to a load-bearing component is known. The fastening arrangement has a damping device with a central shaft on which a rubber element is held coaxially and is surrounded on both sides along the shaft by a hexagonal stop disk made of metal. In order to avoid twisting of the damping device during assembly, a hexagonal metal disk with bent edges is provided, which surround the stop disk laterally, so that the metal disk is arranged on the damping device so that it cannot rotate. On a side facing away from the damping device, the metal disk has several tips which engage in the plastic component during assembly and thus prevent a relative rotation of the metal disk with the damping device relative to the plastic component.

The documents DE 10 2014 102 839 B4 , DE 10 2013 109 673 A1 , DE 10 2013 112 530 B4 and DE 10 2014 112 873 A1 disclose various fastening devices with release locks.

Known fastening arrangements have the disadvantage that the effort involved in machining the body is particularly high and the scope of the assembly process is increased due to the use of additional friction disks. This increases the manufacturing and assembly costs of motor vehicles.

It is therefore an object of the present invention to eliminate or at least partially eliminate the disadvantages described above in a fastening arrangement with a bearing device. In particular, it is the object of the present invention to provide a storage device and a fastening arrangement for storing a first component of a motor vehicle on a second component of a motor vehicle and a motor vehicle which, in a simple and cost-effective manner, requires additional assembly steps and/or complex additional processing of the Avoid bodywork while reducing the risk of relative twisting of the bearing device during the assembly process.

The above task is solved by the patent claims. Accordingly, the task becomes by a storage device for storing a first component of a motor vehicle on a second component of the motor vehicle with the features of independent claim 1, a fastening arrangement for storing a first component of a motor vehicle on a second component of the motor vehicle with the features of the independent claim 8, and by a Motor vehicle solved with the features of independent claim 9. Further features and details of the invention emerge from the subclaims, the description and the drawings. Features and details that are described in connection with the bearing device according to the invention naturally also apply in connection with the fastening arrangement according to the invention and the motor vehicle according to the invention and vice versa, so that reference is or can always be made to each other with regard to the disclosure of the individual aspects of the invention.

According to a first aspect of the invention, the object is achieved by a storage device for storing a first component of a motor vehicle on a second component of the motor vehicle. The bearing device has a first stop disk, a second stop disk and a spring device arranged between the first stop disk and the second stop disk. The first stop disk has a first outside facing away from the second stop disk for contact with the first component. The second stop disk has a second outside facing away from the first stop disk for contact with the second component. According to the invention, the second outside is at least partially designed as a slide-inhibiting surface to inhibit relative rotation between the second component and the second stop disk during an assembly process. The first component is designed as a subframe of the motor vehicle and the second component as a body component of the motor vehicle.

To connect the bearing device to the first component, the bearing device has the first stop disk with the first outside. For assembly, the first outside can be brought into contact with the first component and fastened to the first component via a screw. For this purpose, the first stop disk preferably has a first central bore with an internal thread. Within the scope of the invention, screws, bolts, grub screws and the like are considered to be equivalent.

To connect the bearing device to the second component, the bearing device has the second stop disk with the second outside. For assembly, the second outside can be brought into contact with the second component and fastened to the second component via a screw. For this purpose, the second stop disk preferably has a second central bore with an internal thread. According to the invention, it can be provided that the second bore is arranged coaxially with the first bore. Furthermore, it can be provided that the first bore and the second bore have the same or different diameters. It can also be provided that the first bore and the second bore are designed as a common through bore. The first bore and/or the second bore is preferably arranged coaxially to a longitudinal axis of the bearing device.

The spring device is arranged between the first stop disk and the second stop disk and is preferably delimited from a first side by the first stop disk and an opposite second side by the second stop device. Preferably, the spring device contacts the first stop disk and the second stop disk. The spring device preferably has an elastic rubber element. The spring device is preferably designed to allow a defined translational relative movement between the first stop disk and the second stop disk along the longitudinal axis. More preferably, the spring device is designed to allow a defined pivoting between the first stop disk and the second stop disk.

The second outside of the second stop disk is at least partially designed as an anti-slip surface. Accordingly, it can be provided according to the invention that the second outside is completely, predominantly or only partially designed as a slip-resistant surface. The anti-slip surface is designed to inhibit the relative rotation between the second stop disk and the second component about the longitudinal axis. In other words, a required torque for relative rotation of the bearing device held on the second component to the second component can be increased by the anti-slip surface. This is advantageous, for example, for screwing the bearing device onto the second component, so that no relative movement is caused by tightening the screw.

The anti-slip surface is preferably formed by a structure of the second outside. This means that the second outside is preferably shaped in such a way that the anti-slip surface is at least partially or completely formed. Thus, the anti-slip surface can be created, for example, by forming, machining or the like of the second outside. Alternatively or additionally, the anti-slip surface can be designed, for example, as a coating on the second outside.

According to the invention, the first component is designed as an auxiliary frame of the motor vehicle and the second component is designed as a body component of the motor vehicle. In the manufacture of motor vehicles, the problem of relative twisting during assembly occurs primarily between the bearing device and the body, since the body often still has wax deposits, which can reduce the coefficient of friction between the second stop disk and the body. The storage device according to the invention effectively takes this problem into account. By means of the anti-slip device, the coefficient of friction between the second stop disk and the body can be increased in such a way that the negative influences of the wax deposits can be completely compensated for and the relative twisting during assembly can therefore be avoided. This has the advantage that the assembly of the subframe on the body is improved using simple means and in a cost-effective manner.

A bearing device according to the invention has the advantage over conventional bearing devices that assembly of the first component on the second component is improved using simple means and in a cost-effective manner. The anti-slip surface significantly reduces the risk of the bearing device rotating relative to the second component when fixing the screw. Furthermore, compared to conventional methods of avoiding relative twisting, mechanical treatment of the second component is not required, and no additional friction disks need to be used during assembly, so that the manufacturing and assembly effort and costs of the motor vehicle are reduced.

According to the invention, it is preferred that the anti-slip surface is arranged in a central region of the second outside. The central region preferably extends over at least 30% of a radius or the like of the second stop disk, for example circularly, with the second bore having no anti-slip surface. Preferably, the anti-slip surface is arranged in a, preferably direct, area surrounding the second bore. Particularly preferably, the anti-slip surface completely or at least predominantly surrounds the second bore. The effectiveness of the anti-slip surface is particularly high in the central area, since the central area is arranged in the area of the screw and thus in the central area a surface pressure that can be brought about by the screw between the second outside and the second component is relatively high compared to further outer areas of the second outside . This has the advantage that the manufacturing costs of the bearing device can be reduced and the assembly of the first component on the second component can be improved using simple means and in a cost-effective manner.

More preferably, an outer area of the second outer side surrounding the central area does not have an anti-slip surface. The outer area preferably extends over at least 30% of a radius or the like of the second stop disk, for example in the shape of a circular ring. Preferably, the outdoor area is arranged directly adjacent to the central area. This has the advantage that the manufacturing costs of the bearing device can be reduced and the assembly of the first component on the second component can be improved using simple means and in a cost-effective manner.

In a particularly preferred embodiment of the invention, it can be provided in a bearing device that the anti-slip surface is at least partially designed as a coating with friction particles and/or as an adhesive layer. The coating preferably has hard particles, such as corundum, boron nitride, diamond or the like, which are preferably fixed to the first outside via a matrix material, such as a resin or other adhesive. The adhesive layer is preferably designed to harden under pressure, for example when screwing the bearing device onto the second component. This has the advantage that the manufacturing costs of the bearing device can be reduced and the assembly of the first component on the second component can be improved using simple means and in a cost-effective manner.

Preferably, the anti-slip surface is at least partially designed as a topology of the second stop disk. This means that the anti-slip surface is preferably at least partially monolithic or at least cohesively formed with the second stop disk. In this context, the anti-slip surface can, for example, have a ridge which is formed by producing the second hole and/or one or more further holes on the second outer surface. According to the invention, it can be provided that the anti-slip surface is produced entirely or partially on the second outer surface by embossing, milling, welding, sintering, gluing or the like. Preferably, the anti-slip surface has an orientation which is aligned with the internal thread of the second bore in such a way that the anti-slide surface is anti-slide when inserted screwing the screw into the internal thread of the second hole is increased. This has the advantage that the manufacturing costs of the bearing device can be reduced and the assembly of the first component on the second component can be improved using simple means and in a cost-effective manner.

According to a preferred embodiment of the invention, the topology is designed as a sawtooth structure. The sawtooth structure is preferably aligned with the internal thread of the second bore in such a way that by tightening the screw on the second stop disk, the saw teeth can be cut, preferably at least superficially, into the second component. In addition, the sawtooth structure is preferably aligned with the internal thread of the second bore in such a way that loosening the screw on the second stop disk causes the sawteeth to slide off the second component. In other words, the sawtooth structure is preferably oriented counter to the screwing direction. The risk of the bearing device twisting relative to the second component can thus be further reduced. This has the advantage that the manufacturing costs of the bearing device can be reduced and the assembly of the first component on the second component can be improved using simple means and in a cost-effective manner.

Preferably, the sawtooth structure has a rise angle that is greater than a pitch of an internal thread of the second stop disk for fastening the bearing device to the second component. In this way, the screw connection can be self-locking. This has the advantage that the durability of the attachment of the first component to the second component can be improved using simple means and in a cost-effective manner.

According to a second aspect of the invention, the object is achieved by a fastening arrangement for fastening a first component of a motor vehicle to a second component of the motor vehicle. According to the invention, the fastening arrangement has a bearing device according to the invention and a screw for fixing the bearing device on the second component. The fastening arrangement preferably has a further screw for fixing the bearing device to the first component.

The fastening arrangement according to the invention results in all the advantages that have already been described for a storage device according to the first aspect of the invention. Accordingly, the fastening arrangement according to the invention has the advantage over conventional fastening arrangements that assembly of the first component on the second component is improved using simple means and in a cost-effective manner. The anti-slip surface significantly reduces the risk of the bearing device rotating relative to the second component when fixing the screw. Furthermore, compared to conventional methods for avoiding relative twisting, mechanical treatment of the second component is not required, and no additional friction disks need to be used during assembly, so that the manufacturing and assembly effort and costs of the motor vehicle are reduced.

According to a third aspect of the invention, the object is achieved by a motor vehicle. The motor vehicle has a subframe and a body component. According to the invention, the subframe is mounted on the body component via a fastening arrangement according to the invention. The subframe is preferably mounted on the body component via several fastening arrangements according to the invention. The motor vehicle preferably has a plurality of body components which form a body of the motor vehicle.

The motor vehicle according to the invention has all the advantages that have already been described for a bearing device according to the first aspect of the invention and for a fastening arrangement according to the second aspect of the invention. Accordingly, the motor vehicle according to the invention has the advantage over conventional motor vehicles that assembly of the first component, such as a subframe, on the second component, such as a body, is improved using simple means and in a cost-effective manner. Due to the anti-slip surface of the bearing device, the risk of the bearing device rotating relative to the second component when fixing the screw can be significantly reduced. Furthermore, compared to conventional methods for avoiding relative twisting, mechanical treatment of the second component is not required, and no additional friction disks need to be used during assembly, so that the manufacturing and assembly effort and costs of the motor vehicle are reduced.

• 1 in einer perspektivischen Ansicht eine Befestigungsanordnung gemäß einer bevorzugten ersten Ausführungsform der Erfindung,
• 2 in einer perspektivischen Ansicht eine zweite Anschlagscheibe der Lagervorrichtung aus 1,
• 3 in einer Seitenansicht eine Gleithemmoberfläche der zweiten Anschlagscheibe aus 2, und
• 4 in einer Seitenansicht eine bevorzugte Ausführungsform eines erfindungsgemäßen Kraftfahrzeugs.

A bearing device according to the invention, a fastening arrangement according to the invention and a motor vehicle according to the invention are explained in more detail below with reference to drawings. They show schematically:

• 1 in a perspective view a fastening arrangement according to a preferred first embodiment of the invention,
• 2 in a perspective view of a second stop disk of the bearing device 1 ,
• 3 in a side view, an anti-slip surface of the second stop disk 2 , and
• 4 in a side view a preferred embodiment of a motor vehicle according to the invention.

Elements with the same function and mode of operation are in the 1 until 4 each provided with the same reference numerals.

In 1 the fastening arrangement 15 according to a preferred first embodiment of the invention is shown schematically in a perspective view. The fastening arrangement 15 has a bearing device 1 and a screw 16 with an external thread 18. The external thread 18 has a pitch S.

The bearing device 1 extends along a longitudinal axis L and has a spring device 7 which is arranged between a first stop disk 5 and a second stop disk 6. The first stop disk 5 has a first outside 8 for arrangement on a first component 2 (cf. 4 ) on. The second stop disk 6 has a second outside 9 for contact with a second component 4 (cf. 4 ) on. To attach the bearing device 1 to the second component 4, the bearing device 1 has a second bore 17 which extends through the second stop disk 6 and has an internal thread 14 that cannot be seen in this view. The internal thread 14 has the same pitch S as the external thread 18 of the screw 16. To attach the bearing device 1 to the first component 2, the bearing device 1 preferably has a first bore, which extends through the first stop disk 5 and is not visible in this view, and has an internal thread 14 which is not visible in this view. The first bore and the second bore 17 are arranged coaxially to the longitudinal axis L. In a central area adjacent to the second bore 17, the second outer side 9 has a slide-inhibiting surface 10.

2 shows the second stop disk 6 of the storage device 1 1 schematically in a perspective view. In this view, the second outside 9 of the second stop disk 6 is shown with the second bore 17 and the anti-slip surface 10 formed in the area of the second bore 17. The anti-slip surface 10 has a sawtooth structure 13.

In 3 the anti-slip surface 10 of the second stop disk 6 is off 2 shown schematically in a side view. In this view, the sawtooth structure 13 made up of a plurality of sawteeth 19 can be clearly seen, which extends around the longitudinal axis L. The saw teeth 19 each have an angle of inclination A that is greater than the pitch S of the internal thread 14 of the second bore 17 of the second stop disk 6.

4 shows the preferred embodiment of the motor vehicle according to the invention 3 schematically in a side view. The motor vehicle 3 has a first component 2 designed as an auxiliary frame 11, which is mounted on a second component 4 designed as a body component 12 via several fastening arrangements 15 according to the invention, each of which has a bearing device 1 according to the invention. The arrangement of the subframe 11 and the body component 12 shown in this figure is purely exemplary and can be varied in almost any way within the scope of the invention.

Reference symbol list

1

Storage device

2

first component

3

motor vehicle

4

second component

5

first stop disk

6

second stop disk

7

Spring device

8th

first outside

9

second outside

10

Anti-slip surface

11

Subframe

12

Body component

13

Sawtooth structure

14

inner thread

15

Fastening arrangement

16

screw

17

second hole

18

External thread

19

Sawtooth

A

Rise angle

L

Longitudinal axis

S

pitch

Claims (9)

Storage device (1) for storing a first component (2) of a motor vehicle (3) on a second component (4) of the motor vehicle (3), comprising a first stop disk (5), a second stop disk (6) and one between the first stop disk (5) and the second stop disk (6) arranged spring device (7), wherein the first stop disk (5) for contact with the first component (2) has a first outside (8) facing away from the second stop disk (6) and the second stop disk (6) has a second outside (9) facing away from the first stop disk (5) for contact with the second component (4), characterized in that the second outside (9) is used to inhibit relative rotation between the second stop disk (6) and the second component (4) is at least partially designed as an anti-slip surface (10) during an assembly process, the first component (2) being a subframe (11) of the motor vehicle (3) and the second component (4) being a body component (12) of the motor vehicle (3) is trained. Storage device (1). Claim 1 , characterized in that the anti-slip surface (10) is arranged in a central area of the second outside (9). Storage device (1). Claim 2 , characterized in that an outer area of the second outer side (9) surrounding the central area has no anti-slip surface (10). Bearing device (1) according to one of the preceding claims, characterized in that the anti-slip surface (10) is at least partially designed as a coating with friction particles and/or as an adhesive layer. Bearing device (1) according to one of the preceding claims, characterized in that the anti-slip surface (10) is at least partially designed as a topology of the second stop disk (6). Storage device (1). Claim 5 , characterized in that the topology is designed as a sawtooth structure (13). Storage device (1). Claim 6 , characterized in that the sawtooth structure (13) has a rise angle (A) which is greater than a pitch (S) of an internal thread (14) of the second stop disk (6) for fastening the bearing device (1) to the second component (4). . Fastening arrangement (15) for fastening a first component (2) of a motor vehicle (3) to a second component (4) of the motor vehicle (3), characterized in that the fastening arrangement (15) is a bearing device (1) according to one of the preceding claims and has a screw (16) for fixing the bearing device (1) on the second component (4). Motor vehicle (3), having a subframe (11) and a body component (12), characterized in that the subframe (11) has a fastening arrangement (15). Claim 8 is mounted on the body component (12).

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