Assembly comprising a carriage module and a seat pan module, and a method for producing the assembly

Abstract

The invention relates to an assembly (100) and a method for producing the assembly (100) from a carriage module, in particular a front carriage module or a rear carriage module, which in the assembled state is connected to a seat pan module.

Description

[0001] Description

[0002] Assembly comprising a carriage module and a seat tub module, as well as a method for manufacturing the assembly

[0003] The invention relates to the manufacture of an assembly comprising, in an assembled state, a prefabricated rear body module and a prefabricated seat tub module or a prefabricated front body module and a prefabricated seat tub module.

[0004] German patent application DE 102014219160 A1 discloses retaining brackets. These serve as lashing points in the luggage compartments of motor vehicles for securing cargo, as Isofix anchors for attaching child seats, or as retaining brackets for seatback supports. The retaining brackets are usually made of steel and are integrated into mounting plates or directly into structural components. In this context, a fastening arrangement comprising a retaining bracket and a sheet metal part in a final assembly state is disclosed. The sheet metal part can, for example, be attached to a body component of the motor vehicle at a predetermined position by spot welding.

[0005] German patent application DE 202022 103045 U1 discloses a vehicle seat with a crossbar connected to a seat frame, wherein an ISOFIX mounting is formed with a retaining strap bracket and two ISOFIX brackets, the retaining strap bracket and the two ISOFIX brackets being formed by a single, one-piece wire, preferably made of steel. The wire is at least partially wrapped circumferentially around the crossbar and / or rests against it in certain areas. It is provided that the wire is bonded to the crossbar in at least one of these areas, and preferably in several areas, and preferably in all areas where the wire is wrapped circumferentially around the crossbar and / or rests against it.

[0006] Document CN 117751051 A also describes a vehicle seat. Two mounting holes for attaching a seat back frame are provided in the front and rear of upper panels. Two mounting holes for attaching an upholstery frame structure to a vehicle body are located in the front and rear of so-called floor panel sections. The number of mounting holes can be changed as required. A rear tubular frame has a substantially U-shaped mounting wire extending diagonally upwards at its left and right ends. The mounting wire is a fixed element that serves as a lower anchor point to which an ISOFIX-type child seat, conforming to the International Standards Organization (ISOFIX) standard for child seat mounting systems, is attached to a tubular frame of the vehicle seat.

[0007] CN 209454605 U describes a type of child seat mounting comprising a left access component and a right access component. The left access component includes a first access opening and a second access opening in a body panel, each for bolting to the left end of the body platform. The right access component includes a third access opening and a fourth access opening, each for bolting to the right end of the body platform.

[0008] The object of the invention is to improve the manufacture of an assembly, in particular a body assembly of a vehicle, especially with regard to its ease of assembly.

[0009] The assembly is designed to comprise, in its assembled state, a prefabricated rear body module and a prefabricated seat pan module, or a prefabricated front body module and a prefabricated seat pan module. The respective body module and the seat pan module each have bores in their body structure (the number and positions of which are predetermined), with the bores arranged one above the other as pairs in the assembled state. Preferably, the bores of a bore pair are positioned exactly one above the other in the assembled state.

[0010] The seat tub structure, in its assembled state, has at least one adapter opposite the vehicle structure, in which a retaining bracket is integrated in a fabric- and form-fitting manner and is fabric-fitted to the seat tub structure. The adapter has a bore that aligns with one of the bores in the seat tub module of one of the pairs of bores. Preferably, the bore of the adapter and the bore in the seat tub module are exactly aligned.

[0011] The carriage module and the seat tub module are positively and force-fit connected to each other by screw connections when assembled. Preferably, the carriage module and the seat tub module are positively and force-fit connected to each other exclusively by screw connections.

[0012] It is provided that each pair of bores is assigned a screw connection whose connecting element connects the carriage structure to the seat tub structure in a form-fit and force-fit manner, wherein the adapter with its bore is assigned to at least one of the screw connections, so that the connecting element in this at least one screw connection connects both the carriage structure to the seat tub structure via the pair of bores and the adapter with its integrated retaining bracket to the seat tub structure via the bore in the adapter.

[0013] The connecting element of this at least one screw connection advantageously secures the adapter and the integrated retaining bracket in a form-fit and force-fit manner to the seat tub module in an adapter-integrated screw connection, in addition to the material connection that is executed between the adapter and the seat tub structure.

[0014] In a preferred embodiment, the bores in the carriage structure are arranged in at least one cross member or in the at least one cross member and in at least one longitudinal member. These components of the carriage structure of the carriage module are particularly stable and are advantageously suited for attaching the seat tub module.

[0015] Preferably, the bores in the carriage structure are arranged in a central cross member and a front cross member.

[0016] It is further preferred that the bores in the central crossbeam and / or in the front crossbeam are arranged on a front side and / or a top side of the crossbeams. If the bores in the central crossbeam and in the front crossbeam are arranged on a front side, the fasteners are advantageously inserted uniformly from this direction.

[0017] If the holes in the central cross member and the front cross member are arranged on the front side, the fasteners are advantageously inserted uniformly from one direction – from the front. The fasteners are inserted into the longitudinal member from above. If the holes in the central cross member and the front cross member are arranged on the top side, the fasteners are advantageously inserted uniformly from one direction – from above. The fasteners are then also advantageously inserted into the longitudinal member from above.

[0018] Both concepts are feasible through appropriate automation in the area of ​​an assembly line.

[0019] With regard to the seat tub module, it is preferably provided that the bores in the seat tub structure are arranged in a rear and a front edge area of ​​the seat tub structure or in the rear and the front edge area and the side edge areas.

[0020] In a preferred embodiment of the invention, the carriage structure and the seat pan structure form contact surfaces in the area of ​​the bore pairs. These contact surfaces lie flat against each other in the assembled state, forming contact pairs, so that a surface pressure is exerted between the contact surfaces by the screw connections. This embodiment is advantageous because the forces acting upon it are transferred more effectively from the seat pan structure to the carriage structure due to the surface contact.

[0021] It is further preferred that, during prefabrication, the retaining bracket is / are connected to the adapter by means of at least one spot weld and / or at least one weld seam. Welded connections are advantageous because they create particularly strong connections that can be produced quickly, cost-effectively, and with minimal material usage in series production.

[0022] In a preferred embodiment of the invention, the adapter is further provided that it is an adapter plate having recesses in which leg end sections of the retaining bracket are arranged, each of which is connected to the adapter plate by means of at least one spot weld and / or by means of at least one weld seam. Advantageously, an adapter plate forms a relatively large contact surface on the seat pan structure, whereby forces emanating from the adapter plate can be better transferred into the seat pan structure in the area of ​​the adapter plate.

[0023] Preferably, the holes in the carriage structure are threaded. Advantageously, screw connections can be made without nuts if threaded screws are used as fasteners, which are screwed into the threaded holes in the carriage structure.

[0024] In addition, it is preferably provided in one embodiment that the bores in the seat tray structure are arranged in flat recesses and / or flat provisions.

[0025] Furthermore, it is preferably provided that the recesses and / or indentations are designed as grooved depressions. Advantageously, the recesses in the seat structure save material and weight, while the grooved depressions increase the structural stability of the seat structure.

[0026] In the assembled state, the assembly is characterized in that the connecting means of the screwed connections are threaded screws which, in the assembled state, penetrate the bores designed as through holes in the seat pan structure or in the seat pan structure and the structure of the adapter and are each screwed into the threaded bores in the carriage structure.

[0027] In a further preferred embodiment of the invention, it is provided that the carriage structure is made of a non-ferrous metal material and the seat tub structure, the adapter and the retaining bracket are made of a ferrous metal material.

[0028] Advantageously, the assembly is a hybrid assembly characterized in that the seat tub structure of the seat tub module and the carriage structure of the carriage module, regardless of the materials they are made of, are not materially connected to each other, but can only be connected by form-fit and force-fit.

[0029] In particular, the combination of adapter and retaining bracket integrated into the seat tub module is advantageously an integral part of the seat tub module, so that the retaining bracket no longer needs to be directly connected to the trolley structure of the trolley module in a form-fit, force-fit, or material-fit manner, as was previously the case.

[0030] Preferably, the carriage structure is advantageously made of lightweight die-cast aluminum, wherein the seat pan structure and the adapter are made of sheet steel and the retaining bracket is made of steel wire, all of which advantageously possess high strength to withstand the expected forces. It is preferred that the retaining bracket is an ISOFIX retaining bracket made of steel wire, having a straight U-shaped section from which the straight leg end sections extend, the U-shaped section being angled relative to the leg end sections at a predefinable angle. Advantageously, the U-shaped section can thereby be angled in the easily accessible direction into which a corresponding engagement element engages during the assembly of the ISOFIX connection.

[0031] The prefabricated seat tub module thus comprises a seat tub structure having bores, in particular through bores, the number and positions of which are predetermined, wherein at least one adapter is arranged on the seat tub structure, which is materially bonded to the seat tub structure, and wherein a bore, in particular a through bore, is arranged in the adapter. Furthermore, the seat tub module comprises a retaining bracket, which is materially and form-fittingly integrated into the adapter, wherein the bore in the adapter is aligned with one of the bores in the seat tub structure.

[0032] The invention also relates to a method for manufacturing the assembly comprising the steps: - a) Prefabrication of a front-end module or a rear-end module comprising the steps:

[0033] - Manufacturing a non-ferrous metal wagon structure for the respective wagon module, - Drilling a specified number of holes, in particular through holes, in specified positions into the wagon structure,

[0034] - b) Prefabrication of a sitz bath module with the following steps:

[0035] - Manufacturing a ferrous metal seat tray structure of the seat tray module,

[0036] - Drilling the specified number of holes in specified positions into the seat tub structure,

[0037] - Manufacturing a structure of a ferrous metal adapter,

[0038] - Drilling a hole, in particular a through hole, into the structure of the adapter,

[0039] - Arranging leg end sections of a prefabricated retaining bracket on / in the structure of the adapter,

[0040] - material-bonded connection of the leg end sections of the retaining bracket to the structure of the adapter,

[0041] - materially bonded connection of the adapter structure, in which the leg end sections of the retaining bracket are integrated, with the structure of the seat tub module in such a way that the bore of the adapter aligns with one of the bores in the structure of the seat tub module,

[0042] - c) force- and form-fitting connection of the carriage module prefabricated in a) with the seat tub module prefabricated in b) by means of screw connections.

[0043] The invention is explained below with reference to the accompanying drawings. These show:

[0044] Figure 1 shows an assembly in its assembled state, comprising a rear body module and a seat tub module in a perspective view obliquely from the front;

[0045] Figure 2 shows the assembly according to Figure 1 in a perspective view from the front;

[0046] Figure 3 shows the assembly according to Figures 1 and 2 in a top view;

[0047] Figure 4 shows a first arrangement and positioning variant of a retaining bracket in a pre-assembly between an adapter and the retaining bracket;

[0048] Figure 5 shows the first arrangement and positioning variant of the retaining bracket on a seat tub structure of the seat tub module, wherein the adapter is arranged within the seat tub module in an end assembly at a support of the seat tub structure;

[0049] Figure 6 shows a second arrangement and positioning variant of the retaining bracket in a pre-assembly between the adapter and the retaining bracket;

[0050] Figure 7 shows the second arrangement and positioning variant of the retaining bracket on the seat tub structure of the seat tub module, wherein the adapter is arranged within the seat tub module in an end assembly on a provision of the seat tub structure.

[0051] Figures 1 to 3, which are explained together below, show a component assembly 100 for a vehicle not depicted in detail, in various perspective views. Figure 1 shows, in particular, a rear body component assembly 100 already in the assembled state, in a perspective view from an oblique front angle. Figure 2 shows the rear body component assembly already in the assembled state in a perspective view from the front. Figure 3 shows the rear body component assembly already in the assembled state in a top view.

[0052] It is known to modularly form a complete body of a vehicle from prefabricated modules, wherein, for example, a rear vehicle module, in particular a rear vehicle structure 1, is connected with a front vehicle structure not shown in detail as a front vehicle module to form a vehicle structure that forms the lower platform of the vehicle.

[0053] The rear body structure (1) is typically connected to the front body structure via longitudinal beams. In subsequent assembly steps, further modules, particularly side structures and roof structures, are mounted, meaning they are connected to the vehicle structure forming the lower platform, so that the complete vehicle body is formed in the assembled state.

[0054] It is also known that, to form a seat-partial structure of a second row of seats in the vehicle, a seat pan structure 2 is attached to the rear body structure 1. According to the invention, the seat pan structure 2 is a seat pan.

[0055] The principle of the invention is applicable analogously to an assembly 100 comprising a front-end module and a prefabricated seat tub module, which together form the assembly 100, wherein a seat-side structure, in particular a seat tub structure 2, is attached to a front-end structure of the front-end module in a first row of seats in the vehicle.

[0056] The following description refers to a rear-body module and the seat pan module. The fundamental features of the invention, which do not only relate to a rear-body module, are applicable analogously to a front-body module. This also applies to the seat pan module, which is subsequently explained in the exemplary embodiment in relation to the rear-body module.

[0057] Previously, a stable rear structure 1 was also used as a support structure for support brackets 3, in particular ISOFIX support brackets, wherein a support bracket 3 or usually several support brackets 3 are preferably welded or screwed to the rear structure 1 in positions provided for this purpose with respect to the seat pan.

[0058] One aspect of the invention is that the rear chassis structure 1 is made of die-cast aluminum and can be welded to conventional steel components, such as the seat pan and / or Isofix mounting brackets 3, only with difficulty or at considerable expense, for example by friction stir welding (FSW). Friction stir welding is an innovative welding process with low heat input, allowing even non-ferrous metals with low melting points to be joined to ferrous metals without distortion of the components being joined. However, the complex welding of the aforementioned components, which consist of different materials that are therefore difficult to weld, is to be avoided for cost reasons and to ensure simple and quick assembly on an assembly line, particularly for the operator.

[0059] The starting point of the invention is therefore the requirement to manufacture an assembly which, after assembly, comprises the structure of a front or rear car consisting of a non-ferrous metal, in particular aluminum die-casting, and a seat pan, which is in particular made of a ferrous metal and preferably a sheet steel part, and the at least one retaining bracket 3 also made of a ferrous metal, which is preferably a (steel wire) retaining bracket 3.

[0060] The basic idea is to design the hybrid assembly 100, which takes into account different materials, in a modular manner, wherein a rear axle module, which is explained in detail in the description, comprises the rear axle structure 1 and possibly other components, and wherein a seat pan module comprises the seat pan and the at least one retaining bracket 3 integrated into the seat pan, as is explained in detail below.

[0061] In a process for manufacturing the assembly of the rear chassis structure 1 from a non-ferrous metal material, in particular an aluminum die casting, the shape / contour of the rear chassis structure 1 is, in principle, freely selectable according to the existing boundary conditions within the framework of the die casting manufacturing process.

[0062] Manufacturing and design of the rear chassis module: Within the process for manufacturing assembly 100, the rear chassis module is designed independently of the seat tub module in the manner of a rear chassis structure 1, i.e., it is prefabricated separately in a prefabrication process.

[0063] The rear vehicle module is designed as a one-piece aluminum die-cast component and has both longitudinal members 1.2 and transverse members 1.1, wherein a first illustrated receiving structure is designed for receiving and fastening a luggage compartment floor (not shown) and a second receiving structure is designed for receiving and fastening the seat pan.

[0064] A central cross member 1.1Z is formed between the mounting structures. In the exemplary embodiment, the first mounting structure connects to this cross member in an upper x / y plane, viewed towards the rear of the vehicle. In the exemplary embodiment, the second mounting structure connects to the central cross member 1.1Z in a lower x / y plane, viewed towards a second row of seats located in front of the luggage compartment floor of the vehicle. These planes are created during the contouring of the rear body structure 1 in the prefabrication process, in particular by the fact that the longitudinal member 1.2 extends obliquely downwards from the first mounting structure, so that the second mounting structure is formed in a lower x / y plane.

[0065] Between the upper x / y plane and the lower x / y plane, the longitudinal members 1.2 extend obliquely downwards from a lower edge of a front face of the cross member 1.1, such that the lower x / y plane of the second receiving structure, which is lower than the upper x / y plane, is formed, and a front surface of the front face of the cross member 1.1 is accessible. A top surface is also accessible. This accessibility is important for the solution according to the selected embodiment, since a connection between the rear structure 1 of the rear module and the seat pan of the seat pan module can be established in these areas.

[0066] The areas of the longitudinal beams 1.2 where they run diagonally are also accessible. This accessibility is also important for the solution according to the selected embodiment, since connections between the rear chassis structure 1 and the seat pan can be established in these longitudinal beam areas.

[0067] The second mounting structure, located in the lower plane (i.e., the lower x / y plane), preferably has accessible, bearing-like areas in its front region, essentially above a front cross member 1.1V of the second mounting structure. These areas extend vertically upwards in the z-direction relative to a central region of the second mounting structure, such that a front edge region of the seat pan structure 2, when assembled with the rear chassis structure 1, is higher than a central recess region of the seat pan. These bearing-like areas are hereinafter referred to as bearing blocks and are designated by reference numeral 1.3. The rear region of the second mounting structure is defined by the inclined longitudinal members 1.2 is also slightly higher than the central area of ​​the second mounting structure, so that a rear edge area of ​​the seat tub structure 2 of the seat tub in the assembled state with the rear vehicle structure 1 is also higher than the central recess area of ​​the seat tub.

[0068] Manufacturing and design of the sitz bath module:

[0069] Within the process for manufacturing assembly 100, the seat tub module is formed independently of the rear chassis module with at least one integrated retaining bracket 3.

[0070] The seat pan is manufactured and designed in such a way that it forms flat areas, at least in the areas of the second receiving structure of the rear vehicle structure 1, in which the seat pan is to be connected to the rear vehicle structure 1 in an assembly step of the process for manufacturing the assembly 100.

[0071] In a preferred embodiment not explicitly shown, the seat pan has a flange-like support projecting substantially orthogonally from the central, recessed surface of the seat pan, which extends substantially in the x / y plane. This support extends, for example, over the entire length of the central crossmember 1.1Z, such that, in the assembled state, the rear surface of the flange-like support comes into contact with the front surface of the central crossmember 1.1Z. In other words, in the assembled state, the seat pan and the rear structure 1 form a pair of contact surfaces with adjacent contact surfaces in the area of ​​the front of the central crossmember 1.1Z over the entire length of the crossmember 1.1Z.

[0072] In the embodiment shown in Figures 1 to 3, the seat pan has two flange-like projections 2.1 that extend substantially orthogonally from the central, concave surface of the seat pan, which extends substantially in the x / y plane. These projections 2.1 extend only partially, i.e., not over the entire length of the central crossbeam 1.1Z. In the assembled state, the rear surfaces of the flange-like projections 2.1 bear against the front surface of the central crossbeam 1.1Z in certain areas.

[0073] In other words, in this embodiment, the seat tub structure 2 and the rear body structure 1 form, in the assembled state, two pairs of contact surfaces (one pair of contact surfaces per position) with adjacent contact surfaces in certain areas of the central cross member 1.1Z.

[0074] This design saves weight and material, while ensuring the attachment of the seat pan to the rear chassis structure with corresponding force transmission from the seat pan into the rear chassis structure 1, as will be explained below.

[0075] In the exemplary embodiment, the seat pan is further shaped in the area where the longitudinal members 1.2 run obliquely between the receiving structures, such that rear contact surfaces are formed which, in the assembled state, come into contact with their surfaces facing the seat pan in the oblique areas of the rear chassis structure 1. That is to say, in the assembled state, the seat pan and the rear chassis structure 1 form features 2.2 in the oblique areas of the rear chassis structure 1 and the contour adapted to the oblique areas of the rear chassis structure 1. The two features 2.2 (one feature 2.2 for each longitudinal member 1.2) of the seat pan and the rear chassis structure 1 thus also form, in certain areas, two pairs of contact surfaces with adjacent contact surfaces.

[0076] Furthermore, the front edge of the seat pan, which is slightly higher than the central, gently concave area of ​​the seat pan, is shaped such that rear contact surfaces are formed which, in the assembled state, come into full contact with the bearing-like surface areas of the bearing blocks 1.3 facing the seat pan. This means that, in the assembled state, the seat pan structure 2 and the rear chassis structure 1 also form additional pairs of contact surfaces in the bearing areas of the bearing blocks 1.3 of the rear chassis structure 1 and the front edge of the seat pan, with four pairs of contact surfaces (one pair per bearing block 1.3) being formed in the exemplary embodiment.The description makes it clear that the rear chassis structure 1 and the seat tub structure 2 of the seat tub are coordinated with each other in their respective prefabrication with regard to their respective contours in such a way that in the assembled state they form the described contact surface pairs in certain areas, in the exemplary embodiment eight contact surface pairs, whereby it is provided that in the areas in which the contact surface pairs are formed a form-fit and force-fit assembly takes place, as will be explained below.

[0077] The number of contact surface pairs depends on the size and material thickness of the steel sheet of the seat pan and the forces introduced into the seat pan, with the importance of the forces introduced into the connection points being discussed in more detail later.

[0078] In the exemplary embodiment, a one-piece seat pan extends over the entire width of the rear vehicle structure 1, viewed in the y-direction, between the wheel arches of the rear vehicle structure 1, which are advantageously already formed within the rear vehicle structure 1 during prefabrication.

[0079] In summary, the following pairs of contact surfaces are provided between the rear chassis structure 1 and the seat pan in the exemplary embodiment:

[0080] - Two pairs of contact surfaces between the stops 2.1 and the front or top side of the central cross member 1.1Z.

[0081] - Two pairs of contact surfaces between the inclined areas of the longitudinal beams 1.2 and the provisions 2.2 in the two lateral upper edge areas of the seat tub.

[0082] - Four pairs of contact surfaces between the bearing blocks 1.3 of the front cross member 1.1V and the front upper edge area of ​​the seat pan.

[0083] Figures 1 to 3 already show that in the exemplary embodiment the four bearing blocks 1.3 of the rear structure 1 of the front cross member 1.1V are connected to the front edge area of ​​the seat pan in order to achieve the assembly state of the assembly 100 in the front area of ​​the seat pan.

[0084] For this purpose, four through-holes are formed in the steel sheet of the seat pan in the front edge area of ​​the seat pan at the positions where the contact surface pairs between the seat pan and the bearing blocks 1.3 of the rear chassis structure 1 are formed. Threaded holes are formed in the bearing blocks 1.3 of the front crossmember 1.1V in exactly the same positions in the assembled state.

[0085] In the assembled state of the assembly 100, four screw connections 12 are provided in the exemplary embodiment, which are preferably made by threaded screws 5, the threads of which penetrate the through hole in the seat pan and are screwed into the internal thread of the threaded holes of the bearing blocks 1.3, so that the contact surface pairs between the bearing blocks 1.3 of the front cross member 1.1V and the front edge area of ​​the seat pan come into force-fit contact again in a releasable manner.

[0086] The further “adapter-integrated” screw connections 12A in the area of ​​the further formed contact surface pairs will be discussed later.

[0087] In general, the seat pan structure 2 of the seat pan module is positively and non-positively connected to the rear chassis structure 1 in the area of ​​the intended contact surface pairs (eight contact surface pairs in the exemplary embodiment), as will be explained further below. In other words, the positions for the positive and non-positive connections are already predetermined by the prefabrication concept of the seat pan and the rear chassis structure 1.

[0088] Regarding the basic principle of the invention, it is further explained that it is possible, for example, to design the seat pan structure 2 of the seat pan and the rear chassis structure 1 in the area of ​​the second receiving structure with respect to their contours such that the seat pan structure 2 of the seat pan comes into full contact with the rear chassis structure 1, so that not only are contact surface pairs formed in certain areas, but a full-surface contact surface pair is formed between the lower surface of the seat pan structure 2 of the seat pan and the upper surface of the rear chassis structure 1 in the assembled state. In such a case, the seat pan structure 2 of the seat pan can form contact surface pairs with the rear chassis structure 1 in every area, which are connected to each other in a form-fit and force-fit manner at connection points provided for this purpose.In other words, the selection of positions for the positive and non-positive connections is not limited to the contact surface pairs provided in certain areas, so that the positions intended for connection in the prefabrication concept of the seat pan structure 2 and the rear chassis structure 1 can be chosen more variably. Another aspect of the invention is that, in the prefabrication of the seat pan module, it is provided that at least one retaining bracket 3 is integrated into the seat pan structure 2 of the seat pan, as explained below.

[0089] The special feature is, first of all, that the at least one retaining bracket 3 is no longer attached to the rear chassis structure 1 as was previously customary, in particular by welding, in order to avoid the problems explained above when welding non-ferrous and ferrous metal materials, but is attached to the seat tub structure 2 of the seat tub during prefabrication, so that the prefabricated seat tub module is available, as explained below.

[0090] Figures 4 and 5 describe and illustrate a first arrangement and positioning variant of the connection of the retaining bracket 3 to the seat tub structure 2 of the seat tub and the preparation of the seat tub structure 2 of the seat tub with regard to the later assembly with the rear vehicle structure 1 for the production of the assembly 100 in the necessary steps.

[0091] Figures 4 and 5 initially relate to the arrangement of the retaining bracket 3 on the seat tub structure 2 of the seat tub in the area of ​​the contact surface pairs between the supports 2.1 and the front of the central cross member 1.1Z, compare Figures 1 to 3.

[0092] In a manner of attachment not shown, i.e., the integration of the respective retaining brackets 3 in the area of ​​the contact surface pairs, the retaining bracket 3 can be directly connected to the seat tub structure 2 of the seat tub, in particular by welding.

[0093] Figure 4, however, shows another preferred arrangement of the retaining bracket 3 on the seat tub structure 2 of the seat tub by means of an adapter 4 connected to the seat tub in a material-locking manner, in which the leg end sections of the retaining bracket 3 are previously integrated into the adapter 4 in a form-locking manner as shown in Figure 4 and are subsequently connected to the adapter 4 in a material-locking manner.

[0094] The adapter 4 is preferably designed as an adapter plate. The adapter plate (compare Figures 4 and 5) has recesses, in particular depressions, whose inner contours correspond to the outer contours of the leg end sections of the U-shaped retaining bracket 3, which is preferably made of steel wire.

[0095] The description of the adapter plate and its similar attachment to the seat tub structure 2 of the seat tub at the stops 2.1 is based on only one of the stops 2.1.

[0096] Initially, it is provided that a through-hole is introduced in the recess 2.1 of the seat tub structure 2 of the seat tub during prefabrication, which is preferably positioned such that it corresponds both centrally, i.e. essentially in the middle of recess 2.1 of the seat tub, and in the assembled state of the seat tub and central cross member 1.1Z of the rear body structure 1 with a through-hole in the middle of the adapter plate and a hole, in particular a threaded hole, in the central cross member 1.1Z.

[0097] The threaded screw 5 shown in Figure 4 is not yet in place during the prefabrication of the seat pan and during the arrangement of the adapter plate with the retaining bracket 3 on the seat pan.

[0098] A through-hole is drilled in the center of the adapter plate. In a position corresponding to the assembled state, a hole, particularly a threaded hole, is also drilled in the central crossbeam 1.1 Z during prefabrication.

[0099] More precisely, the adapter plate has a central area in which the through-hole is preferably arranged “centrally”, with the elevations of the recesses brought into the adapter plate being formed on both sides in the longitudinal extension of the adapter plate, which runs transversely to the longitudinal extensions of the recesses.

[0100] In the assembled state of assembly 100, the through holes in position 2.1 of the seat pan and the adapter plate and the threaded hole in central cross member 1.1Z are exactly on top of each other.

[0101] A loose but positively interlocking connection between the adapter plate and the leg end sections of the retaining bracket 3 is initially created by inserting the leg end sections positively into the recesses of the adapter plate. According to Figure 4, the adapter plate is then connected to the leg end sections of the retaining bracket 3 by the welded connections shown in Figure 4, preferably welds N.

[0102] For safety reasons, welds N and preferably two welds N per leg end section (along the end sections) of the retaining bracket 3 are provided, since a large force input is possible or must be taken into account in the retaining brackets 3, which is to be introduced from the retaining bracket 3 onto the adapter plate and in particular into the central cross member 1.1Z or is advantageously introduced into the central cross member 1.1Z in the assembled state with the rear vehicle structure 1.

[0103] After this step, there is initially a fixed assembly of retaining bracket 3 and adapter plate, which is referred to as a pre-assembly with regard to the connection to the seat tub, since this pre-assembly is not yet firmly connected to the seat tub structure 2 of the seat tub.

[0104] This pre-composite is then preferably connected to the seat tub structure 2 of the seat tub as shown in Figure 5:

[0105] The adapter plate is welded to the seat tub structure 2 of the seat tub at the edge of the adapter plate as shown in Figure 5, whereby the leg end sections have previously been positively inserted into the recesses of the adapter plate and form the pre-combination.

[0106] Welded edge side of the adapter plate, as shown in Figure 5, means that the adapter plate has a central area in which the through hole is arranged “centrally”, with the edge areas of the adapter plate being formed on both sides in the longitudinal extent of the adapter plate, which runs transversely to the longitudinal extents of the depressions or elevations.

[0107] Behind the elevations or depressions in the longitudinal extension of the adapter plate, at least one weld connection is carried out in each of the two edge areas of the adapter plate, preferably with several weld points P (compare figure 5) being carried out, by means of which the adapter plate is materially bonded to the support 2.1 of the seat tub structure 2 of the seat tub.

[0108] For safety reasons, for example four welding points P, or alternatively one weld seam N per edge area, are provided, since a large force input is possible or taken into account in the retaining brackets 3, which is to be introduced from the retaining bracket 3 onto the adapter plate and in particular into the central cross member 1.1Z or is advantageously introduced into the central cross member 1.1Z in the assembled state with the rear vehicle structure 1.

[0109] By welding the adapter plate to the support 2.1 of the seat tub, the pre-assembly of adapter plate and the retaining bracket 3 is now firmly arranged in a final assembly on the support 2.1 of the seat tub structure 2 of the seat tub.

[0110] The end assembly is thus characterized in that the retaining bracket 3 is indirectly connected to the support 2.1 of the seat tub via the adapter plate which is directly connected to the support 2.1 of the seat tub.

[0111] The retaining bracket 3 is thus characterized in that it is integrated into or attached to the seat pan in the area of ​​the parking position 2.1 and, in the assembled state of the assembly 100, is connected to the rear vehicle structure 1 via the seat pan structure 2, which will be discussed in more detail below.

[0112] Figures 6 and 7 show the analogous procedure and attachment of a retaining bracket 3 in a second arrangement and positioning variant with respect to the two pairs of contact surfaces between the inclined areas of the longitudinal beams 1.2 and the two provisions 2.2 in the corner area of ​​the lateral edge areas at the rear edge of the seat tub.

[0113] The previous description applies analogously. The similarities and differences will be discussed below.

[0114] Figures 6 and 7 relate to the arrangement of the retaining bracket 3 on the seat pan in the area of ​​the contact surface pairs between the inclined areas of the longitudinal beams 1.2 and the provisions 2.2 of the seat pan formed in the corner areas of the seat pan in the exemplary embodiment.

[0115] Figure 6 shows the arrangement of the retaining bracket 3 on the seat pan by means of the adapter 4, which is connected to the seat pan by means of a material connection. The leg end sections of the retaining bracket 3 are previously integrated into the adapter 4 in a form-fitting manner as shown in Figure 6 and subsequently connected to the adapter 4 by means of a material connection. The adapter 4 is in turn designed as an adapter plate. The adapter plate (compare Figures 6 and 7) has corresponding recesses, in particular depressions, whose inner contours correspond to the outer contours of the leg end sections of the U-shaped retaining bracket 3, which is preferably made of steel wire.

[0116] It is planned that in the inclined areas of the longitudinal members 1.2 within the prefabrication of the rear axle mode, a bore, in particular a threaded bore, is provided in each case.

[0117] The threaded holes are positioned such that they are essentially located in the middle of the longitudinal members 1.2 (viewed transversely to the longitudinal extent of the longitudinal member 1.2) and, in the assembled state of seat pan structure 2 of the seat pan and longitudinal member 1.2 of the rear body structure 1, correspond to the through holes which are located in the provisions 2.2 of the seat pan structure 2 of the seat pan and in the middle of the adapter plate.

[0118] The threaded screw 5 shown in Figures 6 and 7 is not yet in place during the prefabrication of the seat pan and during the arrangement of the adapter plate with the retaining bracket on the seat pan.

[0119] Preferably, the through-hole is thus pre-drilled in the center of the adapter plate, as already explained. More precisely, in this arrangement, the adapter plate has a central area in which the through-hole is preferably positioned "centrally," with the raised sections of the recesses being arranged on both sides along the longitudinal extension of the adapter plate, which runs transversely to the longitudinal extensions of the recesses.

[0120] When the adapter plates are assembled in the inclined areas of the seat pan, the through holes of the adapter plates and the through holes in the provisions 2.2 of the seat pan and the threaded holes in the longitudinal beams 1.2 are exactly aligned.

[0121] First, a loose connection is established between the adapter plate and the leg end sections by inserting the leg end sections into the recesses of the adapter plate in a form-fitting manner. According to Figure 6, the adapter plate is connected to the leg end sections of the retaining brackets 3 by the welded connections shown in Figure 6.

[0122] For safety reasons, welds N and preferably two welds N per leg end section (along the end sections) of the retaining bracket 3 are again provided, since a large force input into the retaining bracket 3 is possible or must be taken into account, which is to be introduced from the retaining bracket 3 onto the adapter plate and in particular into the longitudinal member 1.2 or is advantageously introduced into the longitudinal member 1.2 in the assembled state with the rear vehicle structure 1.

[0123] After this step, there is again a fixed assembly of retaining bracket 3 and adapter plate, which is referred to as a pre-assembly with regard to the connection to the seat tub structure 2 of the seat tub, since the attachment to the seat tub has not yet been carried out.

[0124] This pre-assembly according to Figure 6 is then preferably connected to the seat tub as shown in Figure 7:

[0125] The respective adapter plate is welded to the seat tub at the edge in the area of ​​provisions 2.2, which are located in the corner area of ​​the seat tub, thus creating the final connection.

[0126] The leg end sections were previously inserted into the recesses of the adapter plate in a form-fitting manner, forming the pre-combination.

[0127] Welded edge-to-edge of the adapter plate, as shown in Figure 7, also means that the adapter plate has a central area in which the through-hole is arranged "centrally," with the edge areas arranged on both sides along the longitudinal extension of the adapter plate, which runs transversely to the longitudinal extensions of the recesses or protrusions. Behind the protrusions or recesses, welded joints, in particular weld points P, are made in the two edge areas of the adapter plate along its longitudinal extension, by means of which the adapter plate is bonded to the seat pan.

[0128] For safety reasons, for example four welding points, or alternatively one weld seam N per edge area, are provided, since a large force input is possible or must be taken into account in the retaining brackets 3, which is to be introduced from the retaining bracket 3 onto the adapter plate and in particular into the longitudinal beam 1.2 or is advantageously introduced into the longitudinal beam 1.2 in the assembled state with the rear vehicle structure 1.

[0129] By welding the adapter plate to the seat tub structure 2, the pre-assembly consisting of the adapter plate and the retaining bracket 3 is now also firmly attached to the seat tub in the area of ​​provisions 2.2. The final assembly is thus characterized in that the retaining brackets 3 are indirectly attached to the seat tub in the area of ​​provisions 2.2, with the adapter plate itself being directly connected to the seat tub.

[0130] Other preferred configurations:

[0131] Figures 4 to 7 clearly show that the adapter plate, in its pre-assembly with the retaining bracket 3, is inserted into grooved recesses 2.3 in the seat pan structure 2 of the seat pan in the area of ​​the supports 2.1 and the recesses 2.2, and is then welded to the seat pan structure 2 of the seat pan to create the final assembly, thereby increasing the structural stability of the supports 2.1 and the recesses 2.2 compared to the adjacent areas of the seat pan structure 2 of the seat pan that project from the plane of the grooved recesses 2.3.

[0132] The retaining bracket 3 is preferably an ISOFIX retaining bracket made of steel wire, which has a straight u-shaped section from which straight leg end sections extend, wherein the u-shaped section is angled relative to the leg end sections at a predefinable angle.

[0133] In summary, the assembly of the seat tub module with the rear chassis module according to the exemplary embodiment is carried out as follows:

[0134] The production of assembly 100 is planned to consist of the following steps:

[0135] - a) Prefabrication of the rear axle module with the following steps:

[0136] - Manufacturing a non-ferrous metal rear structure 1 of the rear module. - Providing a specified number of holes, in particular through holes, in specified positions in the rear structure 1 of the rear module.

[0137] - b) Prefabrication of the seat tub module with the following steps:

[0138] - Manufacturing a ferrous metal seat tub structure 2 of the seat tub module.

[0139] - Drilling the specified number of holes in specified positions into the seat tub structure 2.

[0140] - Manufacturing a structure of a ferrous metal adapter 4.

[0141] - Drilling a hole, in particular a through hole, into the structure of the adapter 4.

[0142] - Arranging leg end sections of a prefabricated retaining bracket 3 on / into the structure of the adapter 4.

[0143] - Fabric-bonded connection of the leg end sections of the retaining bracket 3 with the structure of the adapter 4.

[0144] - Fabric-fitting connection of the structure of the adapter 4, in which the leg end sections of the retaining bracket 3 are integrated, with the seat tub structure 2 of the seat tub module such that the bore of the adapter 4 aligns with one of the bores in the seat tub structure 2 of the seat tub module.

[0145] - c) Force-fit and form-fit connection of the rear chassis module prefabricated in a) with the seat tub module prefabricated in b) by means of screw connections 12, 12A.

[0146] The prefabrication processes according to a) and b) are coordinated with each other, particularly with regard to assembly; they can take place independently of each other or in parallel.

[0147] The rear chassis module and the seat pan module are delivered to the assembly line and advantageously joined together in a shorter assembly time than before. The arrangement of the retaining bracket 3 on a rear chassis structure 1 is advantageously shifted from assembly on the production line to the prefabrication of the seat pan module. The steps apply analogously to the production of a front chassis module, which is joined with a seat pan module to form assembly 100.

[0148] In summary, the seat tub is designed differently compared to conventional seat tubs. The retaining brackets 3 are integrated into the seat tub via the adapter 4 during prefabrication. In the concept according to the invention, the seat tub module is advantageously delivered to the assembly line with at least one "adapter-integrated" retaining bracket 3 or brackets 3.

[0149] One advantage is in particular that during assembly, i.e. on the assembly line, by screwing the seat pan in the screw point or screw points in which the adapter 4 is arranged with the retaining bracket 3, both the seat pan structure 2 of the seat pan and the retaining brackets 3, which are connected to the seat pan structure 2 of the seat pan in the final assembly during prefabrication via the adapters, are attached to the rear chassis structure 1, which is made in particular of die-cast aluminum, in one assembly step.

[0150] Because the retaining brackets 3 are already connected to the seat pan structure 2 via the adapter plate, and in particular welded, time is saved during assembly on the assembly line. Furthermore, fewer fasteners are required, as the retaining brackets 3 and the seat pan 2 are no longer bolted separately to the rear chassis structure 1 as usual, thus eliminating the need for separate attachment of the retaining brackets 3. This saves material and speeds up assembly on the assembly line.

[0151] In the exemplary embodiment (compare Figures 1 to 3), four screw connections 12 are preferably provided in four screw points to manufacture the assembly 100 from the rear body module and the seat tub module, to which no adapter plate is assigned.

[0152] In the other four screw-on points for the production of the assembly 100 from the rear body module and the seat tub module, screw connections 12A are carried out, which are referred to as “adapter-integrated” screw connections 12A, since adapter plates with the “adapter-integrated” retaining brackets 3 are screwed into these screw-on points.

[0153] Advantageously, both the seat pan structure 2 of the seat pan is firmly connected to the rear chassis structure 1 at each of the eight screw points, and four retaining brackets 3 are also indirectly connected to the rear chassis structure 1 via the adapter plate at four screw points, i.e., in a form-fit and force-fit manner. This allows forces introduced into the retaining brackets 3 to be transferred into the adapter plate and, via the adapter plate, into the seat pan, or more generally, into the seat pan structure 2, and in particular, via the described contact surface pairs, into the rear chassis structure 1. Forces acting on the retaining brackets 3 are transferred via the respective connecting elements in the "adapter-integrated" screw connections 12A from the adapter plate to the connecting elements and into the rear chassis structure 1, in the exemplary embodiment, in particular into the central cross member 1.1Z and the longitudinal members 1.2 of the rear chassis structure 1. [Reference numeral list]

[0154] 100 assembly

[0155] 1 Rear axle structure

[0156] 1.1 Crossbeams

[0157] 1.1Z central crossbeam

[0158] 1.1V front crossmember

[0159] 1.2 Longitudinal beams

[0160] 1.3 Bearing block

[0161] Seat tub structure

[0162] .1 shutdown

[0163] .2 Providence

[0164] 2.3 Groove Recess

[0165] 3 retaining brackets

[0166] 4 adapters

[0167] 5 threaded screw

[0168] 12 screw connections

[0169] 12A adapter integrated screw connection P weld point

[0170] N weld seam

Claims

- 26 - Patent claims 1. Assembly (100) in an assembled state - a prefabricated rear chassis module and a prefabricated seat tub module or - a prefabricated front chassis module and a prefabricated seat tub module, - wherein the respective carriage module in a carriage structure and the seat tub module in a seat tub structure (2) have bores, wherein the bores are arranged one above the other as pairs of bores in the assembled state, - wherein the seat tub structure (2) has at least one adapter (4) opposite it in the assembled state, in which a retaining bracket (3) is integrated in a form-fitting manner and is connected to the seat tub structure (2) in a form-fitting manner, wherein a bore is arranged in the adapter (4) which is aligned with one of the bores of one of the pairs of bores arranged in the seat tub module, - wherein the carriage module and the seat tub module are connected to each other in the assembled state exclusively by screwed connections in a form-fit and force-fit manner, - wherein each pair of bores is assigned a screw connection (12, 12A) whose connecting element connects the carriage structure to the seat tub structure (2) in a form-fit and force-fit manner, wherein the adapter (4) with its bore is assigned to at least one of the screw connections (12) such that the connecting element in this at least one screw connection (12A) connects both the carriage structure to the seat tub structure (2) via the pair of bores and the adapter (4) with its integrated retaining bracket to the seat tub structure (2) via the bore in the adapter (4).

2. Assembly (100) according to claim 1, characterized in that the bores in the carriage structure are arranged in at least one cross member (1.1) or in the at least one cross member (1.1) and in at least one longitudinal member (1.2).

3. Assembly (100) according to any one of the preceding claims, characterized in that the carriage structure has a central cross member (1.1Z) and a front cross member (1.1V) in which the bores of the carriage structure are arranged.

4. Assembly (100) according to claim 3, characterized in that the bores in the central cross member (1.1Z) and / or in the front cross member (1.1V) are arranged in a front and / or a top side of the cross members (1.1Z, 1.1V).

5. Assembly (100) according to one of the preceding claims, characterized in that bores are arranged in the seat tub structure (2) in a rear and a front edge region of the seat tub structure (2) or in the rear and the front edge region and the side edge regions.

6. Assembly (100) according to one of the preceding claims, characterized in that the carriage structure and the seat pan structure (2) form contact surfaces in the area of ​​the bore pairs which lie flat against each other in the assembled state and form contact surface pairs, so that a surface pressure occurs between the contact surfaces through the screw connections (12, 12A).

7. Assembly (100) according to one of the preceding claims, characterized in that the retaining bracket (3) is / are connected to the adapter (4) by means of at least one spot weld (P) and / or by means of at least one weld seam (N).

8. Assembly (100) according to one of the preceding claims, characterized in that the adapter (4) is an adapter plate having recesses in which leg end sections of the retaining bracket (3) are arranged, each being connected to the adapter plate by means of the at least one spot weld (P) and / or by means of the at least one weld seam (N).

9. Assembly (100) according to one of the preceding claims, characterized in that the bores in the seat tray structure (2) are arranged in planar recesses (2.1) and / or planar provisions (2.2), wherein the recesses (2.1) and / or provisions (2.2) are in particular designed as groove recesses (2.3).

10. Assembly (100) according to one of the preceding claims, characterized in that the connecting means of the screwed connections are threaded screws (5) which, in the assembled state, penetrate the bores designed as through holes in the seat pan structure (2) or in the seat pan structure (2) and in a structure of the adapter (4) and are each screwed into the threaded bores in the carriage structure.

11. Assembly (100) according to one of the preceding claims, characterized in that the carriage structure is made of a non-ferrous metal material and the seat tub structure (2) and the adapter (4) as well as the retaining bracket (3) are made of a ferrous metal material.

12. Assembly (100) according to one of the preceding claims, characterized in that the carriage structure is made of aluminum die-casting and the seat tub structure (2) and the adapter (4) are made of sheet steel and the retaining bracket (3) is made of a steel wire.

13. Assembly (100) according to one of the preceding claims, characterized in that the retaining bracket (3) is an ISOFIX retaining bracket made of steel wire, which has a straight u-shaped section from which the straight leg end sections extend, wherein the u-shaped section is angled relative to the leg end sections at a predefinable angle.

14. Prefabricated sitz bath module, comprising - a seat tub structure (2) having bores, in particular through bores, which are specified with regard to their number and their positions, - at least one adapter (4) which is materially connected to the seat tub structure (2), wherein a bore, in particular a through bore, is arranged in the adapter (4), - a retaining bracket (3) which is integrated into the adapter (4) in a fabric- and form-fitting manner, wherein the bore in the adapter (4) is aligned with one of the bores in the seat tub structure (2).

15. Method for manufacturing an assembly (100) according to claims 1 to 14 comprising the steps: - a) Prefabrication of a front-end module or a rear-end module using the steps:- 29 - - Manufacturing a non-ferrous metal wagon structure for the respective wagon module, - Drilling a specified number of holes, in particular through holes, in specified positions into the carriage structure, - b) Prefabrication of a seat tub module with the following steps: - Manufacturing a ferrous metal seat tray structure (2) of the seat tray module, - Drilling the specified number of holes in specified positions into the seat tray structure (2), - Manufacturing a structure of a ferrous metal adapter (4), - Inserting a hole, in particular a through hole, into the structure of the adapter (4), - Arranging leg end sections of a prefabricated retaining bracket (3) on / in the structure of the adapter (4), - material-bonded connection of the leg end sections of the retaining bracket (3) with the structure of the adapter (4), - materially bonded connection of the structure of the adapter (4) in which the leg end sections of the retaining bracket (3) are integrated, with the seat tub structure (2) such that the bore of the adapter (4) aligns with one of the bores in the seat tub structure, - c) force-fit and form-fit connection of the carriage module prefabricated in a) with the seat tub module prefabricated in b) by means of screw connections (12, 12A).

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