DE102021200512A1 - Add-on part, motor vehicle, method for assembling two components and assembly system - Google Patents

Abstract

The invention relates to an add-on part (1) for mounting on a mounting point (2) of a motor vehicle (3), having a main area (4) and a secondary area (5) with a receiving cavity (7) extending along a cavity axis (6) for engagement a support end area (8) of a support device (9) of an assembly aid (10) for holding the add-on part (1), the receiving cavity (7) having an insertion opening (11) for inserting the support end area (8) and a base area (12) for contacting a Contact area (13) of the supporting end area (8), wherein the receiving cavity (7) in the bottom area (12) along the cavity axis (6) towards the insertion opening (11) has an increasing diameter. The receiving cavity (7) has a securing area (14) between the insertion opening (11) and the base area (12), the base area (12) having a greater increase in diameter towards the insertion opening (11) than the securing area (14). The invention also relates to a motor vehicle (3), a method for mounting an add-on part (1) at a mounting point (2) of a motor vehicle (3), and an assembly system (18).

Description

The present invention relates to an add-on part, in particular a spring strut, for mounting on a mounting point of a motor vehicle, in particular a spring strut mount on a body of the motor vehicle. Furthermore, the invention relates to a motor vehicle with a generic mounting point, in particular a spring strut mount, a method for mounting an add-on part, in particular a spring strut, at a mounting point, in particular a spring strut mount, of a motor vehicle and an assembly system for mounting an add-on part, in particular a spring strut, on a Mounting point of a motor vehicle, in particular a spring strut mount.

Motor vehicles have a number of spring struts, which are each arranged on a spring strut mount of a body of the motor vehicle and are fixed to the spring strut mount, in particular via a screw connection, to absorb mechanical shocks and to compensate for unevenness in the roadway. Suspension struts thus form part of an axle system of the motor vehicle.

When mounting a spring strut on a spring strut mount of a motor vehicle body, precise alignment of the spring strut with the spring strut mount is of great importance. The assembly is mostly done manually, with an alignment of the spring strut to the spring strut mount being ensured by means of additional centering means. Accordingly, for example, precisely fitting mounting holes, centering pins or the like are used to ensure correct alignment of the strut with the strut mount.

From the DE 10 2018 211 525 A1 a strut system with a strut mount and a strut with a strut bearing is known. The spring strut mount is designed to hold the spring strut. The suspension strut bearing has an alignment device for aligning the suspension strut with the suspension strut mount when it is assembled. For this purpose, the alignment device has, for example, a centering pin with a cone tip, which can be inserted into a bore of the spring strut mount. The centering pin also has a shank area with an external thread in order to secure the strut to the strut mount by means of a nut.

Known mounting methods for mounting a spring strut on a spring strut mount have the disadvantage that manual assembly work is relatively high. The spring strut is to be adjusted to the alignment movements caused by the alignment device while it is being assembled with the spring strut mount. In automated assembly processes, this requires robotic devices with very complex sensors. This leads to an increase in assembly costs. In addition, with known auxiliary assembly devices, unwanted lateral forces can occur between the auxiliary assembly device and the first component when aligning the components, which can result in mechanical corrosion of the material, particularly on the centering device, and thus lead to increased wear.

It is therefore an object of the present invention to overcome the above-described disadvantages of an attachment, such as a spring strut, for mounting at a mounting point on a motor vehicle, such as a spring strut mount on a body of the motor vehicle, a motor vehicle, a method for mounting an attachment at a mounting point of a motor vehicle and in a mounting system for mounting an add-on part at a mounting point of a motor vehicle, or at least partially to fix it. In particular, the object of the present invention is to create an attachment, a method, a motor vehicle and an assembly system that improve automated assembly of the attachment at the attachment point and/or tilting of the attachment during alignment in a simple and cost-effective manner to the attachment point and thus reduce wear and tear on the attachment and/or the attachment point.

The above object is solved by the patent claims. Accordingly, the object is achieved by an attachment for mounting on a mounting point of a motor vehicle with the features of independent claim 1, by a motor vehicle with the features of the independent claim 7, by a method for mounting an attachment on a mounting point of a motor vehicle with the features of the independent Claim 8 and solved by a mounting system with the features of independent claim 9. Further features and details of the invention result from the dependent claims, the description and the drawings. Features and details that are described in connection with the add-on part according to the invention naturally also apply in connection with the motor vehicle according to the invention, the method according to the invention and the assembly system according to the invention, and vice versa, so that the disclosure of the individual aspects of the invention is always referred to or referred to alternately can be.

According to a first aspect of the invention, the object is achieved by an add-on part for mounting at a mounting point of a motor vehicle. The attachment has a main area for providing a main technical function of the attachment and a secondary area with a receiving cavity extending along a cavity axis for engaging a supporting end area of a support device of an assembly aid for holding the attachment before and during alignment with the attachment point. The receiving cavity has an insertion opening for inserting the support end area and a bottom area for making contact with a contact area of the support end area for supporting the attachment on the auxiliary assembly device. In addition, the receiving cavity in the base area has an increasing diameter along the cavity axis towards the insertion opening. According to the invention, the receiving cavity between the insertion opening and the base area has a securing area to prevent the support end area of the support device from slipping sideways out of the receiving cavity, the base area exhibiting a greater increase in diameter towards the insertion opening than the securing area.

The main area of the add-on part is preferably designed as a spring strut of a wheel suspension of the motor vehicle and thus preferably has a spring, in particular a helical spring, and a damper. The technical function of a strut is, for example, the cushioning and damping of mechanical shocks, which can be caused, for example, by bumps in the roadway depending on the speed, the total weight and the tires of the motor vehicle.

The receiving cavity is arranged in a secondary area of the add-on part arranged on the main area. A secondary area is understood to be an area of the add-on part that is not required to provide the technical function of the main area. The secondary area is preferably fixed to the main area or formed monolithically with the main area or at least with a section of the main area. The receiving cavity extends along the cavity axis. The receiving cavity is preferably rotationally symmetrical or at least essentially rotationally symmetrical about the cavity axis. A substantially rotationally symmetrical design is understood within the scope of the invention to mean a rotationally symmetrical design which can have individual recesses and/or projections or the like, through which rotational symmetry in the mathematical sense no longer exists. The cavity axis preferably extends along a longitudinal axis of the attachment. An angle between the cavity axis and the longitudinal axis is preferably less than 25°, more preferably less than 20° and particularly preferably less than 15°.

The receiving cavity has the insertion opening for inserting the supporting end area of the supporting device of the auxiliary assembly device. According to the invention, the insertion opening can have an insertion aid, such as a chamfer, a radius or the like, in order to facilitate insertion of the support end region into the receiving cavity. The receiving cavity is delimited by the bottom area, so that the supporting end area can only be inserted into the receiving cavity until the contact area of the supporting end area contacts the bottom area. For this purpose, the support end area can be designed, for example, in the shape of a sphere, so that the contact area is designed in the shape of a circular line.

The bottom area has an increasing diameter along the cavity axis towards the insertion opening. This means in particular that the diameter increases at least in a section of the bottom area. This is preferably a section of the floor area which is adjacent to the security area. A rate of increase in diameter is referred to as diameter increase in the context of the invention. The base area preferably has the technical function of allowing a transverse movement of the supporting end area if a lateral force threshold is exceeded during the alignment of the attachment to the attachment point, so that overloading of the attachment and/or the attachment point and/or the assembly aid can be avoided. In addition, the base area preferably has the technical function of avoiding or at least reducing a transverse movement of the support end area if the transverse force threshold is not exceeded, in particular when transporting the add-on part on the assembly aid device from a pre-assembly site, an intermediate storage facility or the like to an assembly site for assembly of the attachment at the attachment point.

Within the meaning of the invention, an assembly aid device is a device which can be used to improve the assembly of the add-on part at the attachment point. The attachment can be placed over the receiving cavity on the upwardly aligned support end area of the support device of the assembly aid that the contact area contacts the bottom area and the attachment is thus carried by the assembly aid. The assembly aid preferably has a plurality of support devices in order to ensure that the add-on part is held securely on the assembly aid and to enable the add-on part to be aligned to improve the cultivation site. The attachment can be arranged on the assembly aid device in an assembly preparation process and fed to an assembly surface for assembling the attachment at the attachment point. The assembly aid device is preferably designed to accommodate a plurality of identical and/or different add-on parts.

According to the invention, the receiving cavity has the securing area between the insertion opening and the base area. According to the invention, the safety area has a smaller increase in diameter than the base area. The securing area is particularly preferably configured in the shape of a cylinder. The technical function of the safety area is to prevent the support end area from moving laterally out of the receiving cavity, for example as a result of vibration during transport of the attachment arranged on the assembly aid, such as when braking suddenly, accelerating, a collision or the like. In this way, it is possible to prevent the attachment from exceeding a maximum permissible positional deviation relative to the auxiliary assembly device and, in extreme cases, for example falling off the auxiliary assembly device.

An attachment part according to the invention for installation at an attachment point of a motor vehicle has the advantage over conventional attachment parts that, with simple means and in a cost-effective manner, a position compensation of the attachment part to an assembly aid device when aligning the attachment part to the attachment point is improved due to the relatively large increase in diameter of the base area . At the same time, the securing area effectively prevents the add-on part from slipping off the assembly aid to the side. Thus, mechanical forces and wear on the attachment, on the attachment point, on a centering device and on the assembly aid device can be significantly reduced compared to attachments known from the prior art.

According to a preferred further development of the invention, it can be provided for an add-on part that the base area has a linear increase in diameter at least in sections. The base area is therefore preferably completely or at least partially in the form of a pointed cone, a round cone, a truncated cone or a spherical cap. A wall of the bottom area is thus formed obliquely to the cavity axis. A linear increase in diameter causes a linear restoring force when the attachment is arranged on a support end area when the attachment moves transversely to the longitudinal extension of the support end area and the contact area of the support end area is thus moved along the inclined wall and presses against it. This has the advantage that, with simple means and in a cost-effective manner, an alignment force that is required to align the attachment to the attachment point can be applied particularly easily transversely to the cavity axis. This is particularly advantageous if the alignment force is to be applied manually.

It is preferred according to the invention that the base area has a progressive increase in diameter, at least in sections. The base area is therefore preferably completely or at least partially formed according to an inner contour of a half torus, or the cross section of the base area is preferably formed by the outer contour of two quarter circles with a common cutting plane, the quarter circles preferably touching each other at their curve ends on the cutting plane. According to the invention, instead of a circular path, the base area can also have a parabolic or exponential increase in diameter. The wall of the base area is therefore progressively or convexly curved. A progressive increase in diameter causes a degressive restoring force when the attachment is arranged on a support end area when the attachment moves transversely to the longitudinal extension of the support end area and the contact area of the support end area is thus moved along the inclined wall and presses against it. This has the advantage that maximum alignment forces can be reduced with simple means and in a cost-effective manner, so that particularly with relatively large relative movements of the attachment, the auxiliary assembly device must be applied during the alignment process to the attachment point lower forces transverse to the cavity axis. This is particularly advantageous for automated alignment, since wear and energy consumption can be reduced in this way.

More preferably, the base area has a degressive increase in diameter in a base area end section facing away from the safety area. It is preferred here that the base area between the base area end section and the securing area has a base area start section with a progressive increase in diameter. The bottom area end section thus preferably has a concave curvature, preferably according to a partial sphere. The bottom area end section is preferably designed in a form-fitting manner with respect to the contact area of the support device. This is particularly advantageous if the assembly aid has a control device which is designed to move the supporting end area out of the receiving cavity, in particular as a function of a relative position of the attachment to the attachment point, for example when contacting a centering device of the attachment, such as a centering cone, with a counter-centering device of the attachment point, such as a bushing. This has the advantage that a hold of the add-on part on the auxiliary assembly device can be improved with simple means and in a cost-effective manner.

In a particularly preferred embodiment of the invention, it can be provided for an add-on part that the add-on part has a centering device for engaging in a counter-centering device of the attachment point. The centering device preferably has a centering cone, which can be inserted in particular into a counter-centering device designed as a passage. The centering device is designed, in interaction with the counter-centering device, to bring about a transverse force when the attachment has a positional deviation from the attachment point in the transverse direction to the cavity axis. By means of this transverse force, the attachment according to the invention can be aligned to the attachment point when the attachment and attachment point are further brought together. The design of the receiving cavity advantageously reduces the transverse forces, so that wear and tear on the attachment, centering device and counter-centering device is reduced. In addition, a centering device has the advantage that the alignment of the attachment to the attachment point is improved with simple means and in a cost-effective manner, so that only a linear joining force, which acts parallel or at least essentially parallel to the cavity axis, is required to move the attachment align to the mounting site.

More preferably, a radius of the securing area corresponds at least to the sum of a maximum possible centering distance due to the interaction of the centering device with the counter-centering device and a radius of the support end area. In other words, the securing area is preferably designed in such a way that with the maximum possible positional deviation of the attachment and attachment point at which the centering device and the counter-centering device can just about be brought into engagement with one another, a further positional deviation of attachment and attachment point at which the centering device and the counter-centering device can no longer be brought into engagement with one another, is prevented in a form-fitting manner. This has the advantage that, with simple means and in a cost-effective manner, safety is improved when mounting the add-on part at the attachment point and the risk of damage to the centering device or the counter-centering device is reduced.

According to a second aspect of the invention, the object is achieved by a motor vehicle with an attachment point. According to the invention, the motor vehicle has an attachment according to the invention, the attachment being held at the attachment point. The motor vehicle preferably has a plurality of attachment points and a plurality of attachment parts according to the invention, each of which is held at an attachment point. The add-on part is preferably attached to the attachment point by means of screws, bolts or the like. The add-on part is particularly preferably designed as a spring strut and the attachment point is designed as a spring strut mount.

All the advantages that have already been described for an add-on part according to the first aspect of the invention result from the motor vehicle according to the invention. Accordingly, the motor vehicle according to the invention has the advantage over conventional motor vehicles that the assembly of the add-on part at the attachment point is improved with simple means and in a cost-effective manner. A position adjustment of the attachment to an assembly aid is particularly easy when aligning the attachment to the attachment point due to the relatively large increase in diameter of the bottom area. At the same time, the securing area effectively prevents the add-on part from slipping off the auxiliary assembly device, so that the motor vehicle has an improved manufacturing process. Thus, during assembly, mechanical forces and wear on the add-on part, on the attachment point, on a centering device and on the auxiliary assembly device can be significantly reduced compared to known motor vehicles.

• - Bereitstellen eines erfindungsgemäßen Anbauteils an einer Montagehilfsvorrichtung derart, dass ein Stützendbereich einer Stützvorrichtung der Montagehilfsvorrichtung in eine Aufnahmekavität des Anbauteils eingreift und ein Kontaktbereich des Stützendbereichs einen Bodenbereich der Aufnahmekavität kontaktiert und das Anbauteil somit abstützt,
• - relatives Heranbewegen von Anbauteil und Anbaustelle derart, dass eine Zentriervorrichtung des Anbauteils mit einer Gegenzentriervorrichtung der Anbaustelle in Eingriff gerät,
• - weiteres Heranbewegen von Anbauteil und Anbaustelle derart, dass das Anbauteil zur Anbaustelle durch ein Zusammenspiel von Zentriervorrichtung und Gegenzentriervorrichtung in eine Endlage ausgerichtet wird, wobei der Stützendbereich hierbei quer zu einer Kavitätsachse der Aufnahmekavität innerhalb der Aufnahmekavität bewegt wird, und
• - Fixieren des Anbauteils an der Anbaustelle in der Endlage durch ein oder mehrere Befestigungsmittel.

According to a third aspect of the invention, the object is achieved by a method for installing an add-on part at an attachment point of a motor vehicle. The procedure has the following steps:

• - Providing an attachment according to the invention on an assembly aid in such a way that a supporting end area of a support device of the assembly aid engages in a receiving cavity of the attachment and a contact area of the supporting end area contacts a bottom area of the receiving cavity and thus supports the attachment,
• - relative movement of attachment and attachment point such that a centering device of the attachment engages with a counter-centering device of the attachment point,
• - Further moving the attachment and attachment point such that the attachment is aligned to the attachment point by an interaction of centering device and counter-centering device in an end position, the supporting end region being transverse to a Kavi tätsachse the receiving cavity is moved within the receiving cavity, and
• - Fixing the attachment at the attachment point in the end position by one or more fasteners.

First, the add-on part is made available on the auxiliary assembly device. The attachment is preferably designed as a spring strut. The attachment is provided, for example, by hanging the attachment over the receiving cavity on the support end area. The add-on part is preferably held on the auxiliary assembly device by means of additional means, such as an additional support device, additional components for mounting on the motor vehicle, such as a wishbone, or the like. The add-on part is thus held on the auxiliary assembly device so that it can move within a predetermined field of movement transversely to the axis of the cavity. The securing area prevents the support end area from slipping sideways out of the receiving cavity in a form-fitting manner. Furthermore, a maximum positional deviation of the add-on part relative to the auxiliary assembly device is limited by the support end area.

The attachment and attachment point are then moved towards one another. This is done, for example, by lowering the attachment point onto the attachment. Here, the centering device and counter-centering device engage with one another. In this state, at least two degrees of freedom of the add-on part for the assembly aid device are taken transversely to the cavity axis via the interaction of the centering device and the counter-centering device. Thus, for example, a relative pivoting of the attachment to the auxiliary assembly device is positively limited.

As the attachment and attachment point are moved further closer, the centering device and counter-centering device are brought into greater engagement with one another. Here, a lateral force is generated, by means of which the attachment is aligned to the attachment point. When aligning the attachment to the attachment point, the support end area is moved within the receiving cavity transversely to the cavity axis. The transverse force required for this movement is reduced by designing the base area with the increasing diameter. The approach is continued until the attachment is arranged relative to the attachment point in the end position.

In the end position, the add-on part is fixed at the attachment point by means of the fastening means, such as screws or bolts. The assembly aid can then be removed.

The method according to the invention results in all the advantages that have already been described for an add-on part according to the first aspect of the invention and for a motor vehicle according to the second aspect of the invention. Accordingly, the method according to the invention has the advantage over conventional methods that the assembly of the attachment at the attachment point is improved with simple means and in a cost-effective manner and a position compensation of the attachment to the assembly aid device when aligning the attachment to the attachment point due to the relatively large increase in diameter of the bottom area is particularly easy to do. At the same time, the safety area effectively prevents the attachment part from slipping off the assembly aid device to the side, so that mechanical forces and wear on the attachment part, on the attachment point, on a centering device and on the assembly aid device can be significantly reduced when the method is carried out compared to known methods.

According to a fourth aspect of the invention, the object is achieved by an assembly system for assembling an add-on part at an attachment point of a motor vehicle. The assembly system has an attachment, the attachment point and an assembly aid for holding the attachment before and during alignment with the attachment point. The assembly aid has a support device with a support end area and a contact area formed on the support end area. According to the invention, the attachment is designed as an attachment according to the invention.

The mounting system according to the invention provides all the advantages that have already been described for an add-on part according to the first aspect of the invention, a motor vehicle according to the second aspect of the invention, and for a method according to the third aspect of the invention. Accordingly, the mounting system according to the invention has the advantage over conventional mounting systems that the mounting of the add-on part at the mounting point is improved with simple means and in a cost-effective manner and a position compensation of the add-on part to the mounting aid device when aligning the add-on part to the mounting point due to the relatively large increase in diameter of the bottom area is particularly easy to do. At the same time, the securing area can effectively prevent the attachment part from slipping off the auxiliary assembly device to the side, so that mechanical forces and wear on the attachment part, on the attachment point, on a centering device and on the auxiliary assembly device can be significantly reduced when installing the attachment part at the attachment point compared to known assembly systems

According to a preferred embodiment of the invention, it can be provided in an assembly system that the auxiliary assembly device has a triggering device, the triggering device being designed to move the supporting device away from the receiving cavity depending on a relative position of a centering device of the attachment and a counter-centering device of the attachment point. The triggering device is preferably designed to move the support device away from the attachment when the centering device engages in the counter-centering device and thus occupies degrees of freedom of a relative movement of the attachment to the assembly aid. This has the advantage that transverse forces required for aligning the attachment to the attachment point are reduced with simple means and in a cost-effective manner, since a resistance provided by the support device to such a relative movement of attachment to the assembly aid is thereby reduced.

• 1 in einer Seitenansicht eine bevorzugte Ausführungsform eines erfindungsgemäßen Montagesystems,
• 2 in einer Schnittdarstellung unterschiedliche Ausführungsformen eines Nebenbereichs eines erfindungsgemäßen Anbauteils,
• 3 in einer Seitenansicht eine bevorzugte Ausführungsform eines erfindungsgemäßen Kraftfahrzeugs, und
• 4 in einem Ablaufdiagramm eine bevorzugte Ausführungsform eines erfindungsgemäßen Verfahrens.

An attachment according to the invention, a motor vehicle according to the invention, a method according to the invention and an assembly system according to the invention are explained in more detail below with reference to drawings. They each show schematically:

• 1 in a side view a preferred embodiment of a mounting system according to the invention,
• 2 in a sectional view, different embodiments of a secondary area of an attachment according to the invention,
• 3 in a side view a preferred embodiment of a motor vehicle according to the invention, and
• 4 in a flow chart a preferred embodiment of a method according to the invention.

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

In 1 a preferred embodiment of a mounting system 18 according to the invention is shown schematically in a side view. The mounting system 18 has an attachment 1 according to the invention designed as a spring strut with a main area 4 and a secondary area 5 . In the secondary area 5 there is a receiving cavity 7 with a cavity axis 6 which in this illustration opens downwards via an insertion opening 11 . The receiving cavity 7 has a bottom area 12 at an end remote from the insertion opening 11 and a securing area 14 between the insertion opening 11 and the bottom area 12 .

In addition, the assembly system 18 has an auxiliary assembly device 10 with a support device 9 which is held on a device frame 20 of the auxiliary assembly device 10 in a linearly movable manner. The support device 9 has a support end area 8 which protrudes into the receiving cavity 7 . A hemispherically convex contact area 13 of the support end area 8 contacts the base area 12 of the receiving cavity 7 , for example in the form of a circular line, and thus supports the add-on part 1 . In addition, the auxiliary assembly device 10 has an anti-loss device 21 which is held rigidly on the device frame 20 and engages in the attachment 1 to prevent the attachment 1 from falling off the auxiliary assembly device 10 . Furthermore, the assembly aid device 10 has a triggering device 19 for detecting a position of the add-on part 1 relative to an attachment point 2, the attachment point 2 in the example shown being a spring strut mount of a motor vehicle 3 (cf. 3 ) is trained.

In the state shown, a centering device 16 embodied as a centering cone of the add-on part 1 is engaged with a counter-centering device 17 embodied as a passage of the attachment point 2 . The triggering device 19 is preferably designed to move the support device 9 away from the attachment 1 in this state in order to improve the further alignment of the attachment 1 to the attachment point 2 . A securing radius R ₁ of the securing area 14 corresponds approximately to a sum of a maximum centering distance Z defined by the counter-centering device 17 and a supporting end radius R ₂ of the supporting end area 8.

2 shows different embodiments of a secondary area 5 of an attachment 1 according to the invention schematically in a sectional view. The illustrations show differently designed receiving cavities 7 which essentially differ from one another in terms of the design of the base areas 12 and the length of the securing areas 14 . The securing areas 14 are cylindrical and therefore have no or only a relatively small increase in diameter. A support end area 8 of a support device 9 protrudes into each of the receiving cavities 7, with the contact area 13 of the support end area 8 contacting the base area 12 and thus supporting the attachment 1 (not shown). In the first example viewed from the left, the base area 12 is in the form of a truncated cone. An angle between a wall in the bottom area 12 and the cavity axis 6 is over 45°. In the second example, the bottom area 12 is concave, so that the bottom area 12 has a degressive increase in diameter. In the third example, the base area 12 has a progressive increase in diameter. In the fourth example, the base area 12 has a degressive increase in diameter in a base area end section 15 and a progressive increase in diameter between the base area end section 15 and the securing area 14 .

In 3 a preferred embodiment of a motor vehicle 3 according to the invention is shown schematically in a side view. The motor vehicle 3 has a plurality of add-on parts 1 designed as a spring strut, each of which is held at a mounting point 2 of the motor vehicle 3 designed as a spring strut mount, in particular by means of a plurality of screws or bolts.

4 shows a preferred embodiment of a method according to the invention schematically in a flow chart. In a first method step 100, an attachment 1 according to the invention is provided on an auxiliary assembly device 10. This is done in such a way that a supporting end area 8 of a supporting device 9 of the assembly aid 10 engages in a receiving cavity 7 of the attachment 1 and a contact area 13 of the supporting end area 8 contacts a bottom area 12 of the receiving cavity 7 and the attachment 1 is thus supported. In a second method step 200, the attachment 1 and the attachment point 2 are moved relative to one another. This is preferably done by moving the assembly aid 10 horizontally together with the attachment 1. More preferably, the movement is carried out by subsequently moving the attachment point 2 vertically toward the assembly aid 10. The movement takes place up to a centering device 16 of the attachment 1 with a counter-centering device 17 of the attachment point 2 gets engaged. In a third method step 300, attachment 1 and attachment point 2 are moved further closer, preferably by a linear movement, such as lowering attachment point 2 onto attachment 1 or raising attachment 1 to attachment point 2. In addition, the further approach takes place in such a way that the attachment 1 is aligned to the attachment point 2 by an interaction of centering device 16 and counter-centering device 17 in an end position. In this case, the supporting end area 8 is moved transversely to a cavity axis 6 of the receiving cavity 7 within the receiving cavity 7 and thus migrates along the bottom area 12 of the receiving cavity 7. In a fourth method step 400, the attachment 1 is secured at the attachment point 2 in the end position by one or more fastening means fixed. The assembly aid 10 is then removed from the attachment 1 .

Reference List

1

attachment

2

growing site

3

motor vehicle

4

main area

5

side area

6

cavity axis

7

receiving cavity

8th

supporting area

9

support device

10

assembly aid device

11

insertion hole

12

floor area

13

contact area

14

security area

15

floor area end section

16

centering device

17

counter centering device

18

mounting system

19

release device

20

jig frame

100

first step in the process

200

second process step

300

third step

400

fourth step

R1

fuse radius

R2

support radius

Z

center distance

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was 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.

Patent Literature Cited

• DE 102018211525 A1 [0004]

Claims (10)

Attachment (1) for mounting on an attachment point (2) of a motor vehicle (3), having a main area (4) for providing a main technical function of the attachment (1) and a secondary area (5) with a cavity axis (6) extending along Receiving cavity (7) for engaging a supporting end area (8) of a supporting device (9) of an assembly aid (10) for holding the add-on part (1) before and during alignment with the attachment point (2), the receiving cavity (7) having an insertion opening (11) for inserting the supporting end area (8) and a bottom area (12) for contacting a contact area (13) of the supporting end area (8) for supporting the add-on part (1) on the auxiliary assembly device (10), the receiving cavity (7) in the bottom area (12 ) along the cavity axis (6) towards the insertion opening (11) has an increasing diameter, characterized in that the receiving cavity (7) between the insertion opening (11) and the The bottom area (12) has a safety area (14) to prevent the supporting end area (8) of the support device (9) from slipping sideways out of the receiving cavity (7), the bottom area (12) increasing in diameter towards the insertion opening (11) more than the safety area (14). Attachment (1) according to claim 1 , characterized in that the base area (12) has at least in sections a linear increase in diameter. Attachment (1) according to claim 1 or 2 , characterized in that the base area (12) has a progressive increase in diameter at least in sections. Attachment (1) according to one of the preceding claims, characterized in that the base area (12) has a degressive increase in diameter in a base area end section (15) remote from the securing area (14). Attachment (1) according to one of the preceding claims, characterized in that the attachment (1) has a centering device (16) for engaging in a counter-centering device (17) of the attachment point (2). Attachment (1) according to claim 5 , characterized in that a securing radius (R ₁ ) of the securing area (14) is at least the sum of a maximum possible centering distance (Z) due to the interaction of the centering device (16) with the counter-centering device (17) and a supporting end radius (R ₂ ) of the supporting end area (8 ) is equivalent to. Motor vehicle (3) having an attachment point (2), characterized in that the motor vehicle (3) has an attachment (1) according to one of the preceding claims, the attachment (1) being held at the attachment point (2). Method for mounting an attachment (1) at an attachment point (2) of a motor vehicle (3), comprising the following steps: - Providing an attachment (1) according to one of the Claims 1 until 6 on an auxiliary assembly device (10) in such a way that a supporting end area (8) of a supporting device (9) of the auxiliary assembly device (10) engages in a receiving cavity (7) of the add-on part (1) and a contact area (13) of the supporting end area (8) has a bottom area ( 12) of the receiving cavity (7) and thus supports the attachment (1), - relative movement of attachment (1) and attachment point (2) such that a centering device (16) of the attachment (1) with a counter-centering device (17) of the Attachment point (2) engages, - further movement of attachment (1) and attachment point (2) such that the attachment (1) to the attachment point (2) through an interaction of centering device (16) and counter-centering device (17) in an end position is aligned, with the supporting end area (8) being moved transversely to a cavity axis (6) of the receiving cavity (7) within the receiving cavity (7), and - fixing the attachment (1) at the attachment point (2) in the end position one or more fasteners. Mounting system (18) for mounting an add-on part (1) at a mounting point (2) of a motor vehicle (3), having the add-on part (1), the mounting point (2) and an assembly aid device (10) for holding the add-on part (1) in front and during alignment to the attachment point (2), the assembly aid (10) having a support device (9) with a support end area (8) and a contact area (13) formed on the support end area (8), characterized in that the add-on part (1) according to one of the Claims 1 until 6 is trained. Mounting system (18) according to claim 9 , characterized in that the assembly aid device (10) has a triggering device (19), the triggering device (19) being designed, the supporting device (9) depending on a relative position of a centering device (16) of the add-on part (1) and a counter-centering device direction (17) of the attachment point (2) to move away from the receiving cavity (7).

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