Assembly for a motor vehicle body

Abstract

The invention relates to an assembly (4) for a motor vehicle body (1), comprising at least one first body component (8) which has at least one receiving area (10) in which a fluid (2) can be collected during immersion treatment of the motor vehicle body (1), and comprising at least one second body component (9) formed separately from the first body component (8) which has a drain opening (12) through which the fluid (2) can flow, wherein at least one drain system (13) through which the fluid (2) can flow and which has at least one drain channel (14) is provided, through which the fluid (2) collected in the receiving area (10) of the first body component (8) during immersion treatment of the motor vehicle body (1) can be directed to the drain opening (12) of the second body component (9) in order to discharge the fluid (2) from the assembly (4) via the drain opening (12).

Description

[0001] The invention relates to an assembly for a motor vehicle body according to claim 1.

[0002] DE 10 2016 001 182 B4 discloses a sealing arrangement of a sealing element on a cast component of a vehicle, in which the cast component has at least one cast dome with at least one through-opening which is sealed by means of the sealing element, wherein the through-opening has a first cross-section and at least one second cross-section adjoining the first cross-section and smaller than the first cross-section, to which the sealing element is attached.

[0003] The object of the invention is to create an assembly for a motor vehicle body so that immersion bath treatment of the motor vehicle body can be carried out with minimal effort.

[0004] This problem is solved according to the invention by an assembly for a motor vehicle body with the features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims and the description.

[0005] The invention relates to an assembly for a motor vehicle body. The term "motor vehicle body" can be understood to mean, in particular, a body, preferably a self-supporting body, for a motor vehicle. The motor vehicle is preferably designed as a passenger car, commercial vehicle, or truck.

[0006] The assembly can refer in particular to a multi-part or multi-section assembly of the motor vehicle body. The assembly is, for example, at least one part of the motor vehicle body. Preferably, the motor vehicle, particularly in its fully manufactured state, comprises the motor vehicle body, and in particular the assembly. Preferably, the motor vehicle body, particularly in its fully manufactured state, comprises the assembly.

[0007] The assembly comprises at least one body component which has at least one receiving area in which, during or as a result of immersion treatment of the vehicle body, at least one fluid can be collected or received. In other words, the receiving area is designed to collect or receive the fluid.

[0008] The term "fluid" can be understood to mean, in particular, a fluid with which at least one immersion tank is filled, into which the assembly or the vehicle body is immersed, at least partially, and in particular predominantly or completely, during the immersion bath treatment. In particular, the receiving area has at least a volume for collecting or receiving the fluid. The receiving area or volume is preferably at least partially, and in particular predominantly or completely, for example, in the upward direction of the vehicle body or downwards, bounded or formed by at least one surface of the first body component, in particular directly.

[0009] The receiving area is designed, for example, as a cavity, which can be described in particular as a cavity or an intermediate space. Preferably, the cavity, especially in the fully manufactured state of the motor vehicle body, is free of material.

[0010] The assembly comprises at least one second body component, formed separately from the first. In other words, the assembly is multi-part or multi-piece, in particular two-part or two-piece. The body components are preferably, in particular directly, preferably mechanically, connected to one another. This means that the body components are attached to one another via at least one fastening point, in particular at least indirectly or directly. For example, the body components abut each other at least partially, in particular directly.

[0011] The term "body component" can refer to a single component of the body or an assembly of several components, particularly those that are separately manufactured. In other words, each body component can be a single piece or multiple pieces.

[0012] The first body component is designed, for example, as a frame, in particular as a rear frame and / or as a support frame. Alternatively or additionally, the first body component is designed, for example, as a longitudinal member or as a transverse member. Alternatively or additionally, the first body component is designed, for example, as a tub, in particular as a luggage compartment tub. Alternatively, the first body component is designed, for example, as a strut mount.

[0013] The second body component is designed, for example, as a frame, in particular as a rear frame and / or as a support frame. Alternatively or additionally, the second body component is designed, for example, as a longitudinal member or as a transverse member. Alternatively or additionally, the second body component is designed, for example, as a tub, in particular as a luggage compartment tub. Alternatively, the second body component is designed, for example, as a strut mount.

[0014] The support frame is designed, for example, as a support frame for at least one power electronics unit, such as an electrical energy storage device, in particular a high-voltage storage device. The longitudinal member can be understood to be, in particular, a longitudinal structure. The transverse member can be understood to be, in particular, a transverse structure. A principal direction of extension of the longitudinal member preferably runs, particularly in the installation position of the body component in the vehicle body or the vehicle, at least substantially in the longitudinal direction of the vehicle body or the vehicle. A principal direction of extension of the transverse member preferably runs, particularly in the installation position of the body component in the vehicle body or the vehicle, at least substantially in the transverse direction of the vehicle body or the vehicle.For example, the respective body component is made of at least one metal, in particular aluminum.

[0015] To make the immersion treatment of the vehicle body particularly cost-effective, the second body component is provided with at least one drain opening through which the fluid can flow, which can be referred to as a discharge opening. In other words, the drain opening is designed to remove the fluid from the second body component, in particular from the assembly and / or the vehicle body. Furthermore, at least one drainage system with at least one drain channel through which the fluid can flow is provided, through which the fluid collected or absorbed during the immersion treatment of the vehicle body in the receiving area, in particular in the volume and / or on the surface, of the first body component, especially in a horizontal position of the assembly or the vehicle body, is drained.For example, the fluid can be directed or guided, at least indirectly or directly, to the drain opening of the second body component, in particular in a targeted manner, in order to drain the fluid from the assembly, in particular the vehicle body, via the drain opening, and, for example, to introduce it into the surrounding area of ​​the assembly, in particular the vehicle body. This means that the fluid collected in the receiving area of ​​the first body component can be supplied to the second body component and directed to its drain opening by means of the drainage system, in particular by means of the drain channel, at least via the first body component, and, for example, via at least one further body component or several further body components formed separately from the body components, thereby draining the fluid from the assembly, in particular the vehicle body, via the drain opening.The drainage system comprises at least one length range formed or limited at least partially, in particular predominantly or completely, by the first body component and at least one second length range, in particular different from the first length range and at least partially limited or formed by the second body component, wherein the length ranges are fluidically connectable or connected to each other via at least one connection point, whereby the fluid collected in the receiving area during or as a result of the immersion bath treatment of the motor vehicle body can be conveyed via the first length range to the connection point, via which the fluid conveyed to the connection point can be at least partially, in particular predominantly or completely, discharged from the first length range and introduced into the second length range.through which the fluid introduced into the second length section can be directed to the drain opening, through which the fluid directed to the drain opening can be discharged from the assembly, in particular from the vehicle body.

[0016] The drainage system is preferably formed at least partially, and in particular predominantly or completely, by the first body component and / or the second body component. In particular, the receiving area is fluidically connectable to the drainage opening via the drainage system, and in particular via the drainage channel, at least indirectly, and in particular directly. The drainage channel can be understood to be, in particular, a drainage channel through which the fluid flows. The drainage channel is, for example, at least partially, and in particular predominantly or completely, bounded or formed by the first body component and / or by the second body component. This means that the first and / or the second body component can have the drainage channel, and in particular a respective channel section of the drainage channel. The drainage channel can be the first and / or the second length section of the drainage system.

[0017] Guiding the fluid to the drain opening can be understood, in particular, preferably in a controlled manner, as guiding the fluid to the drain opening by means of at least one wall region of the drainage system, especially by means of at least one channel wall of the drainage channel. This means that the fluid collected in the receiving area can, for example, flow along the wall region, especially the channel wall, to reach the drain opening, particularly by means of gravity.

[0018] The term "horizontal position" can be understood to mean, in particular, the normal position or orientation of the assembly, especially the vehicle body. For example, the assembly or vehicle body assumes a horizontal position when installed in the vehicle. Preferably, the vehicle's vertical direction in the horizontal position runs at least substantially parallel to a vertical direction. The vertical direction can be understood, in particular, as a vertical direction relative to an inertial spatial coordinate system. Preferably, the vertical direction runs parallel to the direction of gravity. This means that the vehicle's vertical direction in the horizontal position preferably runs parallel to the direction of gravity, and in particular, opposite to the direction of gravity.

[0019] The invention is based in particular on the following findings and considerations: In immersion bath treatment, the surfaces of vehicle bodies can be coated by immersion in various baths, for example, by means of cathodic dip painting (e-coating). When the vehicle body is immersed in and out of a respective immersion tank or bath, which can also be referred to as an immersion bath, the body structure can, depending on its geometric design, initially draw a certain amount of liquid medium from the bath. This medium, also simply referred to as fluid, can therefore be located in the receiving area as a result of the immersion bath treatment. The receiving area can thus undesirably lead to the drawing of fluid from the immersion tank.Through holes and openings in the body structure, the fluid can drain from the scooping body over a certain period, depending, for example, on the size of the holes and the volume scooped. In a conventional assembly or a conventional car body, not all scooping areas and cavities can usually be completely emptied before the assembly or car body is immersed in another bath or tank, which can be referred to as the next bath or tank. This can cause fluid carryover, a phenomenon known as fluid transfer, from the previous immersion tank to the next. This can lead to contamination between the baths. This can have negative ecological and economic consequences, as cleaning of the tanks may be necessary.Furthermore, the industrial production of large series in the automotive industry can demand a particularly fast cycle time or throughput time per car body. This necessitates the fastest possible drainage of the fluid from the receiving area to enable the rapid transport of the car bodies from one immersion bath to the next. With conventional assembly or car body manufacturing, this drainage process can typically be quite lengthy. In principle, it is conceivable to avoid areas or cavities that draw fluid into the body during assembly or body manufacturing. However, this may be countered by the trend towards particularly large, integrated cast structural components in vehicle bodies, for example, due to lightweight construction requirements.It is therefore unavoidable, for example, that the car body is lifted from the immersion tank in an orientation such that cavities or hollow spaces, for example in cast structures, of the body component are closed downwards in the direction of gravity, allowing the fluid to collect in the receiving space or cavity, or to be scooped out of the tank. In principle, it is conceivable to tilt or rotate the car bodies to allow the fluid to drain from the receiving area. However, this can be particularly complex and can negatively impact the manufacturing process, especially the process speed.

[0020] In contrast, the immersion bath treatment can be carried out with particularly low effort using the assembly according to the invention. The fluid scooped from the immersion tank and collected in the receiving area can drain away as quickly and completely as possible via the drain opening thanks to the drainage system, in particular the drain channel. The drainage of the fluid, referred to in particular as the media drain, can thus be directed by the drainage system, in particular by the drain channel, over a cascade of body components, referred to in particular as components, until the fluid can exit via the drain opening, for example at the lowest point of the assembly or of the vehicle body (also referred to as the body structure) relative to the vehicle's vertical direction.Thus, for example, by shaping the body components that overlap at least partially, a drainage system, referred to in particular as a channel system, can be formed to remove the fluid. Furthermore, the number of drain openings, especially those requiring closure, can be kept to a minimum in the assembly according to the invention, since the drain opening of the second body component can be used for the fluid collected in the receiving area of ​​the first body component. The number of closure operations for openings, for example in a vehicle assembly plant, can therefore be kept to a minimum, which can lead to significant economic and / or environmental advantages. It is evident that the manufacturing effort for producing the assembly, especially the vehicle body, can be kept to a minimum.In particular, the manufacturing effort, such as production costs, of the motor vehicle can be kept particularly low. For example, it is possible to close as few holes as possible, which are needed purely for vehicle construction, especially for media drainage and / or as body mounting points, using only sealing elements. Overall, it is evident that the assembly according to the invention enables the design of a body structure with a media drainage channel system.

[0021] For example, the cavity, particularly in the installed position of the assembly or the vehicle body within the vehicle, is bounded downwards in the vertical direction of the vehicle by at least one floor surface, in particular directly. In other words, the cavity is formed downwards in the vertical direction of the vehicle by the floor surface. This means that the floor surface surrounds the cavity at least partially, in particular predominantly or completely, in the vertical direction of the vehicle. The floor surface can be understood to be, in particular, the base surface of the first body component.

[0022] For example, the cavity, particularly in the installed position of the assembly or the vehicle body in the vehicle, is at least partially, and in particular predominantly or completely, bounded in the vehicle's vertical and / or longitudinal direction by at least one wall section of the first body component, and in particular directly. In other words, the cavity is formed at least partially, and in particular completely, by the wall section of the first body component in the vehicle's transverse and / or longitudinal direction. This means that the wall section of the first body component surrounds the cavity in the vehicle's transverse and / or longitudinal direction, at least partially, and in particular predominantly or completely.

[0023] For example, the cavity, particularly in the installed position of the assembly or the vehicle body in the vehicle, is at least partially open upwards in the vehicle's vertical direction. This means that the cavity is open upwards in the vehicle's vertical direction, i.e., it is not, and especially not completely, closed. In other words, the cavity has at least one opening at an upper end relative to the vehicle's vertical direction, which is preferably at least partially, and especially predominantly or completely, bounded, for example, in a radial direction, by the wall area of ​​the first body component, and especially directly.

[0024] The wall area of ​​the first body component preferably projects from the base surface. In particular, the wall area of ​​the first body component is connected to the base surface, at least indirectly, for example, directly. The wall area of ​​the first body component can be designated or configured as a side wall and / or front wall. The base surface is, for example, part of a base body of the first body component, wherein the wall area of ​​the first component preferably projects from the base body and is, in particular, connected to the base body. The base surface is configured, for example, as the upward-facing top surface of the first body component, especially the base body, particularly in the installed position of the assembly or the vehicle body in the vehicle.

[0025] The term "vehicle vertical direction" can refer in particular to the vertical direction of the vehicle body and / or the vehicle itself. The term "vehicle transverse direction" can refer in particular to the transverse direction of the vehicle body and / or the vehicle itself. The term "vehicle longitudinal direction" can refer in particular to the longitudinal direction of the vehicle body and / or the vehicle itself.

[0026] In a further embodiment, at least one through-opening, distinct from the drain opening, is provided through which the fluid flowing through the first longitudinal section of the drainage system formed by the first body component can be discharged from the first longitudinal section and introduced into the longitudinal section of the drainage system formed by the second longitudinal section of the body component. This means that the fluid collected in the receiving space can be guided through the first longitudinal section to the through-opening, through which the fluid flowing through the first longitudinal section can be discharged, in particular at least partially, predominantly, or completely, from the first longitudinal section and introduced into the second longitudinal section. The fluid can then be guided, in particular via the drain channel, to the drain opening in order to discharge the fluid from the assembly, in particular the vehicle body, via the drain opening.In other words, the connection point is designed as a through-opening, particularly between the first and / or the second body component. This allows the fluid to be guided from the first body component to the second body component with minimal effort and / or with exceptional precision.

[0027] Preferably, the through-opening has a diameter of at least 8 mm, for example, at least 15 mm or at least 20 mm. This ensures that the fluid can be reliably guided through the through-opening from the first body component to the second body component. Alternatively or additionally, the through-opening has a diameter of no more than 35 mm, in particular no more than 30 mm, 25 mm, or 20 mm. This allows for a particularly good compromise between the fluid flow rate through the through-opening and other restrictions of the vehicle body, for example, regarding installation space, stability, and / or manufacturing effort.

[0028] In a further embodiment, it is provided that the drain channel is formed or bounded by at least one of the body components, in particular by the first body component, and / or by the second body component. This means that the drain channel extends along at least one of the body components, in particular the first and / or the second body component. In other words, the first and / or the second body component incorporates the drain channel.

[0029] Preferably, the body component containing the drain channel, in particular the first and / or the second body component, has at least one, in particular each, base surface, and the drain channel is formed as a recess at least partially in relation to the, in particular each, base surface. In other words, the recess is formed on or in the base surface, through which the drain channel is formed at least partially, in particular predominantly or completely. This allows the fluid to be guided to the drain opening by means of the drain channel, in particular without the fluid flowing over the base surface. Thus, only a portion of the first and / or the second body component needs to be designed to guide the fluid, which significantly reduces the manufacturing effort of the assembly, in particular of the vehicle body.

[0030] Particularly when the second body component has the drain channel, the first body component, for example, has a second drain channel through which the fluid can flow, and through which the fluid collected in the receiving area during the immersion bath treatment can be directed to the connection point, in particular the through-opening, especially to introduce the fluid into the drain channel via the connection point. The first and the second drain channels are preferably fluidically connected or connectable to each other via the connection point, in particular the through-opening, for example at least indirectly or directly.

[0031] In a further embodiment, it is provided that the body component with the base surface, in particular the first and / or the second body component, has at least one wall that is formed separately from the drain channel and projects from the base surface. In other words, the wall extends obliquely or perpendicularly to the base surface. In particular, the fluid flowing through the drain channel can be guided or directed to the drain opening via the drain channel, bypassing the wall, i.e., without flowing along the wall. The drain channel and the wall can thus be designed independently of each other, where the drain channel can be optimized for guiding the fluid and the wall can be optimized with regard to other objectives, such as load-bearing capacity and / or weight and / or installation space of the assembly or the vehicle body.

[0032] In a further embodiment, the drain channel is provided to have a depth of at least 3 mm, for example at least 5 mm. Alternatively or additionally, the drain channel has a depth of a maximum of 20 mm, in particular a maximum of 15 mm or a maximum of 10 mm. In other words, a bottom surface, in particular of the first and / or the second body component, which at least partially, in particular predominantly or completely, defines or forms the drain channel in a direction, in particular a depth direction, is set at least 3 mm and / or a maximum of 20 mm away from the base surface, wherein the direction preferably runs perpendicular to a flow direction of the fluid flowing through the drain channel, and in particular perpendicular to the width direction of the drain channel.This allows for particularly optimized fluid flow and thus fluid removal, with minimal manufacturing effort during assembly, especially of the vehicle body.

[0033] In a further embodiment, the drain opening is provided to have a diameter of at least 20 mm, in particular at least 25 mm. Alternatively or additionally, it is provided, for example, that the drain opening has a diameter of a maximum of 35 mm, in particular a maximum of 30 mm. This allows for a particularly good compromise between the fluid flow rate through the drain opening and other restrictions of the vehicle body, for example with regard to installation space and / or stability and / or manufacturing effort.

[0034] In a further embodiment, a closure element, particularly one through which the fluid can flow, is arranged in the drain opening. In other words, the closure element is located in the drain opening. The closure element is designed to allow the fluid to flow through it in a first flow direction, in which the fluid can be discharged from the assembly, particularly the vehicle body, via the drain opening. In other words, the closure element is designed to be permeable to the fluid in the first flow direction, i.e., permeable to the fluid. The first flow direction can be understood to be, in particular, the flow direction in which the fluid flows when it passes through the drain opening, and especially the closure element, while the fluid is being discharged from the assembly via the drain opening, and especially via the closure element.In particular, the closure element is only permeable to fluid flow in the first flow direction. The outlet opening is fluidically closed in a second flow direction opposite to the first flow direction by means of, or via, the closure element. This means that the flow of fluid or a different fluid through the outlet opening, and especially through the closure element, in the second flow direction is prevented, i.e., it is not possible. The closure element is therefore not permeable to fluid and / or the other fluid in the second flow direction. In other words, the closure element is designed as a closure element that is permeable to fluid flow from one side only, i.e., in one direction.This means that the sealing element, and thus in particular the drain opening sealed by the sealing element, is only permeable to fluid flow in the first flow direction, relative to both the first and second flow directions. The drain opening, which can also be described as the final outlet for the fluid, can therefore be sealed with the sealing element, which can provide a real benefit to the customer, especially after the vehicle has been manufactured. The sealing element allows the assembly, particularly the vehicle body, to be kept especially tight in the second flow direction, while in the first flow direction the sealing element allows fluid to drain away.For example, the closure element can be used to drain fluid, as well as to remove any fluid that may have entered the vehicle body during operation, for instance, due to a leak. This ensures reliable fluid drainage while maintaining a particularly reliable seal for the vehicle body. The fluid could be water, for example, from a leaking roof, or spilled by a passenger. The second body component can be designed as a drain pan, and the closure element can be designed as a drain spout, specifically a water drain spout.

[0035] In a further embodiment, it is provided that in a pivoting position intended for removing the vehicle body from the immersion tank, in which the vehicle body is pivoted about a pivot axis relative to the horizontal position of the vehicle body, the fluid collected in the receiving area of ​​the first body component during or as a result of the immersion treatment of the vehicle body can be directed or guided via the drainage system, in particular via the drainage channel, to the drainage opening of the second body component in order to discharge the fluid via the drainage opening from the assembly, in particular from the vehicle body.In other words, the drainage system is designed, for example inclined, in such a way that, in the pivot position (specifically referred to as the rotation position), the fluid located in the receiving area can be guided via the drainage system, particularly by means of the drainage channel, to the drainage opening. This allows the fluid to be discharged from the assembly, particularly the vehicle body, via the drainage opening, i.e., while the vehicle body is in the pivot position. Thus, in the pivot position, the fluid can be discharged from the receiving area via the drainage system via the drainage opening in any pivot state. Therefore, in addition to a horizontal position, the discharge of the fluid via the drainage system is also possible in the pivot position, which can be described as a tilted state. This allows for particularly reliable fluid discharge.

[0036] The pivot position, for example, is a static state, that is, a static position in which rotation or pivoting of the vehicle body around the pivot axis does not occur, or the pivot axis is a, in particular point-like, snapshot of a rotation curve in which the vehicle body is lifted out of the immersion tank.

[0037] In a further embodiment, the fluid flowing through the drainage system, in particular the drainage channel, is directed or guided via the drainage system, in particular via the drainage channel, especially in the installed position of the assembly in the vehicle body or in the vehicle, in the longitudinal direction of the vehicle towards the drain opening. In other words, the second longitudinal section of the drainage system, which at least indirectly, in particular directly, adjoins the first longitudinal section downstream in the direction of flow of the fluid flowing through the drainage channel, is arranged further rearward in the longitudinal direction of the vehicle than the first longitudinal section of the drainage system.This allows the fluid to be reliably and efficiently drained from the receiving area via the drainage system through the drain opening when removing the vehicle body from the immersion tank, using the usual and particularly low-effort direction of rotation or swiveling of the vehicle body.

[0038] A first further aspect concerns a motor vehicle body with at least one assembly according to the first aspect of the invention. Advantages and advantageous embodiments of the invention are to be regarded as advantages and advantageous embodiments of the first further aspect and vice versa.

[0039] A second further aspect relates to a method for immersion treatment of a motor vehicle body comprising at least one assembly according to the invention, particularly according to the first further aspect. Advantages and advantageous embodiments of the invention are to be regarded as advantages and advantageous embodiments of the first and the second further aspect, and vice versa.

[0040] In this process, at least the assembly of the motor vehicle body, in particular the motor vehicle body, is immersed at least partially, in particular predominantly or completely, in a immersion tank filled with the fluid.

[0041] In immersion bath treatment, the fluid, for example, a coating, can be applied to the assembly, particularly the vehicle body, in one or more layers. The coating or coating can be specifically designed to protect the assembly or vehicle body from corrosion as part of cathodic dip coating (e-coating). The immersion bath treatment can be referred to as an immersion bath or an immersion process. Examples of immersion bath treatments include cathodic dip coating (e-coating), degreasing, phosphating, passivation, activation, painting, and / or various rinsing processes.

[0042] Cathodic dip coating can be described in particular as electrophoretic deposition (EPD). In this process, colloidal particles are deposited onto an electrode under the influence of an electric field. During cathodic dip coating, the assembly or vehicle body is at least partially coated with a coating, often referred to as cathodic dip coating, as a result of immersion in the fluid in the dip tank.

[0043] By immersing the assembly, particularly the vehicle body, in the fluid, at least some of the fluid can collect, especially while the assembly or vehicle body is within the immersion tank, at least in the receiving area of ​​the first body component. Preferably, after immersion, the assembly, particularly the vehicle body, is removed from the immersion tank, i.e., lifted out. During and / or after lifting, the fluid collected in the receiving area can be directed via the drainage system, particularly via the drainage channel, to the drain opening in order to discharge the fluid from the assembly, particularly from the vehicle body, through the drain opening.The vehicle body is, for example, in a horizontal position or in a pivoted position, in which it is pivoted about at least one pivot axis relative to the horizontal position. It can therefore be provided that the vehicle body is pivoted or rotated about the pivot axis into the pivoted position when removed from the immersion tank and / or after removal from the immersion tank, for example, from the horizontal position. In the pivoted position, the fluid collected in the receiving area can be conveyed via the drainage system, in particular via the drainage channel, to the drainage opening in order to discharge the fluid from the assembly, in particular from the vehicle body, via the drainage opening.

[0044] Further features of the invention will become apparent from the claims, the figures, and the description of the figures. The features and combinations of features mentioned above in the description, as well as the features and combinations of features mentioned below in the description of the figures and / or shown in the figures alone, are not only usable in the combinations specified, but also in other combinations or on their own.

[0045] The invention will now be explained in more detail with reference to a preferred embodiment and the drawings. The drawings show: Fig. 1. A schematic view illustrating a process for immersion treatment of a motor vehicle body; and Fig. 2 a schematic and perspective partial sectional view of an assembly according to the invention for a motor vehicle body; and Fig. 3 a schematic partial sectional view of an assembly according to the invention for a motor vehicle body according to a further embodiment; and Fig. 4 a schematic and perspective partial view of an assembly according to the invention for a motor vehicle body according to a further embodiment; and Fig. 5 A schematic view to illustrate a method for immersion treatment of a motor vehicle body according to a further embodiment.

[0046] In the figures, identical or functionally equivalent elements are provided with the same reference symbols.

[0047] Fig. Figure 1 shows a schematic view of a method for immersion treatment of a motor vehicle body. Fig. Figure 1 shows a schematic side view of the car body 1 and a diving tank 3 filled with a fluid 2.

[0048] In this process, at least one assembly 4 of the vehicle body 1 is immersed in the immersion tank 3 filled with fluid 2. The immersion treatment is, for example, cathodic dip painting (e-coating), particularly for corrosion protection of the vehicle body 1.

[0049] In the Fig. In the embodiment shown in Figure 1, the car body 1 is removed from the immersion tank 3 and moved upwards in a vertical direction 5 for this purpose. The car body 1 is thus moved upwards in a vertical direction 5 to remove it from the immersion tank 3 filled with fluid 2.

[0050] In the Fig. In the embodiment shown in Figure 1, the car body 1 is in a horizontal position 6. The car body 1 is thus, for example, removed from the immersion tank 3 in the horizontal position 6 in a vertical direction 5 upwards.

[0051] The car body 1 is then moved away from immersion tank 3, particularly forwards, and transferred to another immersion tank, different from immersion tank 3, for immersion into the further immersion tank. This is described in Fig. 1 illustrated by means of an arrow 7.

[0052] Fig. Figure 2 shows the motor vehicle body 1, and in particular the assembly 4, in a schematic and perspective partial sectional view. The assembly comprises several separately formed body components 8, 9, for example a first body component 8 and at least one second body component 9 formed separately from the first body component.

[0053] The first body component 8 has at least one receiving area 10, which is designed, for example, as a cavity. The receiving area 10 is, for example, at least partially, in particular predominantly or completely, bounded or formed by at least one wall region 11 of the first body component 8, for example, entirely. In the exemplary embodiment, the receiving area 10 is at least partially, in particular predominantly or completely, closed downwards in the vehicle's vertical direction 28. When the vehicle body 1 is immersed in the immersion tank 3 filled with the fluid 2, at least some of the fluid 2 can enter the receiving area 10 as a result of the immersion and collect there. In other words, during the immersion treatment of the vehicle body 1, the fluid 2 can be collected or received at least in the receiving area 10.

[0054] To enable the immersion treatment of the vehicle body 1 to be carried out with minimal effort, it is provided that the second body component 9 has at least one drain opening 12 through which the fluid can flow, and that the assembly, in particular the first and / or the second body component 8, 9, has at least one drain system 13 through which the fluid 2 can flow. The drain system 13 has at least one drain channel 14 through which the fluid can flow. Via the drain system 13, in particular via the drain channel 14, the fluid collected in the receiving area 10 of the first body component 8 during the immersion treatment of the vehicle body 1, in particular at least in the horizontal position 6, can be conveyed at least indirectly, in particular directly, to the drain opening 12 of the second body component 9 in order to discharge the fluid 2 from the assembly 4, in particular the vehicle body 1, via the drain opening 12.

[0055] Fig. Figure 3 shows the assembly in a schematic partial sectional view. In the Fig. 2 and Fig. In the embodiment shown in Figure 3, the second body component 9 has the drain channel 14, wherein at least one connection point 15 is provided, via which the receiving area 10 of the first body component 8 is at least indirectly fluidically connected or connectable to the drain channel 14, whereby the fluid 2 collected in the receiving area 10 during the immersion bath treatment of the vehicle body 1 can be introduced at least indirectly, in particular directly, into the drain channel 14 via the connection point 15, via which the fluid 2 introduced into the drain channel 14 can be directed to the drain opening 12 in order to discharge the fluid 2 from the assembly 4, in particular the vehicle body 1, via the drain opening 12.In a further embodiment, the drainage system 13 is provided to have at least one first longitudinal section 16 formed by the first body component 8 and at least one second longitudinal section 17 formed by the second body component 9. The second longitudinal section 17 is arranged downstream of the first longitudinal section 16 in the direction of flow of the fluid 2 flowing through the drainage system 13.

[0056] In the Fig. 2 and Fig. In the embodiment shown in Figure 3, the receiving area 10 is configured as the first length section 16 of the drainage system 13. In this embodiment, the second length section 17 is configured as the drainage channel 14. Furthermore, at least one through-opening 18 is provided through which the fluid 2 can flow, and through which the fluid 2 flowing through the first length section 16 can be discharged from the first length section 16 and introduced, at least indirectly, and in particular directly, into the second length section 17, especially the drainage channel 14. In the embodiment shown in Figure 3, the receiving area 10 is configured as the first length section 16. Fig. 2 and Fig. In the embodiment shown in Figure 3, the connection point 15 is designed as the through-opening 18, whereby the fluid collected in the receiving area 10 can be introduced at least indirectly into the second length area 17, in particular into the drain channel 14, via the through-opening 18.

[0057] In the exemplary embodiment, the assembly 4 comprises at least one third body component 19, which is formed separately from the body components 8, 9. Preferably, the body components 8, 9, 19 are connected to each other at least indirectly, and in particular directly. Preferably, the body components 8, 9, 19 overlap or cover each other at least partially.

[0058] In the Fig. 2 and Fig. In the embodiment shown in Figure 3, the drainage system 13 has at least one third length section 20, which is distinct from the length sections 16 and 17 and is formed or limited at least partially, and in particular predominantly or completely, by the third body component 19. The third length section 20 is arranged downstream of the first length section 16 and upstream of the second length section 17 in the direction of flow of the fluid 2 through the drainage system. The third length section 20 is designed, for example, as a receiving space, in particular as a cavity.

[0059] In the exemplary embodiment, the first length section 16 is fluidically connected, or connectable, to the third length section 20 via the connection point 15, in particular via the through-opening 18. The third and the second length sections 20, 17 are fluidically connected, or connectable, via at least one second connection point 21a spaced apart from the connection point 15, which is, for example, configured as a second through-opening 21b. In other words, the fluid can be discharged from the first length section 16 via the first connection point 15 and introduced into the third length section 20, and the fluid 2 can be discharged from the third length section 20 via the second connection point 21a and introduced into the second length section 17, in particular into the drain channel 14.Thus, the fluid collected in the receiving area 10 of the first body component 8 during the immersion bath treatment of the motor vehicle body can be directed via the length areas 16, 17, 20, in particular via the connection points 15, 20, i.e. by means of the third body component 19, to the drain opening 12 of the second body component 9.

[0060] In this embodiment, the drain channel 14 is formed at least by the second body component 9, which has at least one base surface 22. The drain channel 14 is formed, at least partially, and in particular predominantly or completely, as a recess 23 with respect to the base surface 22. The recess is, for example, formed as a groove or as an embossing. Furthermore, the second body component 9 has at least one wall 24 that is separate from the drain channel 14 and projects from the base surface 22. For example, the wall 24 completely surrounds the base surface 22, giving the second body component 9 a trough-shaped form.

[0061] Fig. Figure 4 shows the motor vehicle body 1 or the assembly 4 in a schematic and perspective partial view according to a further embodiment, in which the drain channel 14 is formed at least partially, in particular predominantly or completely, by the body components 8, 9, 19. This means that each body component 8, 9, 19 has a respective channel section 25, 26, 27 of the drain channel 14. For example, the respective length section 16, 17, 20 of the drain system 13 is configured as the respective channel section 25, 26, 27. Thus, the first length section 16 is configured, for example, as the first channel section 25, the second length section 17 is configured, for example, as the second channel section 26, and the third length section 20 is configured, for example, as the third channel section 26.

[0062] Preferably, the through-opening 18 and / or the second through-opening 21b have a diameter of at least 8 mm and / or a maximum of 35 mm. Preferably, the second through-opening 21b has a diameter of at least 8 mm and / or a maximum of 35 mm.

[0063] Preferably, the drain opening 12 is provided to have a diameter of at least 20 mm and / or a maximum of 35 mm.

[0064] Preferably, the drainage channel 14, in particular the first and / or second and / or third channel section 25, 26, 27, has a depth of at least 3 mm and / or a maximum of 20 mm, in particular each.

[0065] In a further embodiment, it is provided that the fluid 2 flowing through the drainage system 13 can be directed via the drainage system 13 in the longitudinal direction 29 of the vehicle to the rear to the drainage opening 12. In particular, the fluid 2 introduced at least indirectly into the drainage channel 14, especially into the second channel section 26, via the connection point 15, and especially via the second connection point 21a, can be directed via the drainage channel 14, especially via the second channel section 26, in the longitudinal direction 29 of the vehicle to the rear to the drainage opening 12.

[0066] In this embodiment, a closure element 30 is arranged in the drain opening 12. This means that the drain opening 12 is closed by means of the closure element 30. The closure element 30 allows fluid 2 to flow through it in a first flow direction 31, in which the fluid 2 can be discharged from the assembly 4 via the drain opening 12. Furthermore, the drain opening 12 is closed by means of the closure element 30 in a second flow direction 32, opposite to the first flow direction 31. This means that the closure element, or rather the drain opening 12, is not open to fluid 2 in the second flow direction 32 as a result of the closure element 30. The closure element 30 is, for example, designed as a drain nozzle.The drain opening 12 can be closed before or after the immersion bath treatment by means of the closure element 30. The closure element 30 can also be used to create an opening function in the first flow direction 31, particularly in the event of a malfunction, for example, if water enters the vehicle body 1, especially the second body component 9, in order to drain the water from the vehicle body 1. This is advantageous, for example, if the water enters a luggage compartment of the vehicle body 1. Thus, the closure element 30 can be understood to be, in particular, a one-sided opening.

[0067] For example, the drain opening 12 and / or the respective through-opening 18, 21b are designed to accommodate, for example, a holding device in car body construction and to allow fluid to flow through them, i.e., to drain fluid 2 or other media. In other words, the drain opening 12, also simply referred to as openings, and the through-openings 18, 21b for media drainage can be combined with functional holes for component mounting or used multiple times. The mounting of the holding device or component mounting can be understood to refer in particular to clamping technology used during car body construction processes.

[0068] The passage openings 18, 21b are not, or will not be, closed, especially after the complete manufacture of the motor vehicle body 1 or the motor vehicle.

[0069] Overall, it is evident that the second body component, designed, for example, as a luggage compartment tray, overlaps at least partially the 9 holes in the form of the through-openings 18, 21b in the cross member of the vehicle body 1, thereby forming the drainage system 13, also simply referred to as the channel system. The cross member is formed, for example, at least partially, and in particular predominantly or completely, by the first and the third body components 8, 19.

[0070] Fig. Figure 5 shows a schematic view of the immersion bath treatment method according to a further embodiment, in which, when removing the vehicle body 1 from the immersion tank 3, the vehicle body 1 is pivoted about a pivot axis from the horizontal position 6 to a pivot position 33. Thus, in Fig. Figure 5 shows the vehicle body 1 in the pivot position 33 intended for removing the vehicle body 1 from the immersion tank 3. The vehicle body 1 is pivoted about the pivot axis relative to the horizontal position 6. The pivot axis runs, for example, in the transverse direction of the vehicle. Removal is carried out in Fig. 5 illustrated by means of an arrow 34.

[0071] Preferably, it is provided that the fluid 2 collected in the receiving area 10 of the first body component 8 during the immersion bath treatment of the vehicle body 1 can be directed via the drainage system 13 to the drain opening 12 of the second body component 9 in the pivot position 33, in order to discharge the fluid 2 from the assembly 4 via the drain opening 12. In particular, in the pivot position 33, the fluid collected in the receiving area 10 can be introduced at least indirectly via the connection point 15, and in particular via the second connection point 21a, into the drain channel 14, in particular into the second channel section 26, via which the fluid 2 introduced into the drain channel 14, in particular into the second channel section 26, can be directed to the drain opening 12 in order to discharge the fluid 2 from the assembly 4 via the drain opening 12. Reference symbol list 1 Motor vehicle body 2 Fluid 3 plunge pools 4 Assembly 5 vertical direction 6 Horizontal position 7 Arrow 8 first body component 9 second body component 10 Recording area 11 Wall area 12 Drainage opening 13. Flow system 14 Drainage channel 15 liaison point 16 first length range 17 second length range 18 Passage opening 19 third body component 20 third length range 21a second junction 21b second passageway 22 Base area 23 In-depth study 24 wall 25 first canal section 26 second canal section 27 third canal section 28 Vehicle lifting direction 29 Vehicle longitudinal direction 30 locking element 31 first flow direction 32 second flow direction 33 Swivel position 34 Arrow QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2016 001 182 B4

[0002]

Claims

[1] An assembly (4) for a motor vehicle body (1), comprising at least one first body component (8) having at least one receiving area (10) in which a fluid (2) can be collected during an immersion bath treatment of the motor vehicle body (1), and comprising at least one second body component (9) formed separately from the first body component (8) and having a drain opening (12) through which the fluid (2) can flow, wherein at least one drain system (13) through which the fluid (2) can flow and having at least one drain channel (14) is provided, via which drain system the fluid (2) collected in the receiving area (10) of the first body component (8) during the immersion bath treatment of the motor vehicle body (1) can be conducted to the drain opening (12) of the second body component (9) in order to discharge the fluid (2) from the assembly (4) via the drain opening (12). [2] Assembly (4) according to claim 1, characterized bythat at least one through-opening (18) through which the fluid (2) can flow, via which the fluid (2) flowing through a longitudinal region (16) of the drainage system (13) formed by the first body component (8) can be discharged from the first longitudinal region (16) and introduced into a second longitudinal region (16) of the drainage system (13) formed by the second body component (9). [3] Assembly (4) according to claim 2, characterized by that the through opening (18) has a diameter of at least 8 millimetres and / or a maximum of 35 millimetres. [4] Assembly (4) according to one of the preceding claims, characterized by that the drainage channel (14) is formed by at least one of the body components (8, 9) which has at least one base surface (22), and the drainage channel (14) is designed as a recess (23) at least in regions with respect to the base surface (22). [5] Assembly (4) according to claim 4, characterized bythat the body component (8, 9) having the base surface (22) has at least one wall (24) formed separately from the drainage channel (14) and protruding from the base surface (22). [6] Assembly (4) according to one of the preceding claims, characterized by that the drainage channel (14) has a depth of at least 3 millimetres and / or a maximum of 20 millimetres. [7] Assembly (4) according to one of the preceding claims, characterized by that the drain opening (12) has a diameter of at least 20 millimetres and / or a maximum of 35 millimetres. [8] Assembly (4) according to one of the preceding claims, characterized byin that a closure element (30) is arranged in the drain opening (12), which closure element is designed to discharge the fluid (2) via the drain opening (12) in a first flow direction (31) in which the fluid (2) can be discharged from the assembly (4) via the drain opening (12), through which the fluid (2) can flow, and the drain opening (12) is fluidically closed by means of the closure element (30) in a second flow direction (32) opposite to the first flow direction (31). [9] Assembly (4) according to one of the preceding claims, characterized byin a pivoting position (33) provided for removing the motor vehicle body (1) from a dip tank (3), in which the motor vehicle body (1) is pivoted about a pivot axis relative to a horizontal position (6) of the motor vehicle body (1), the fluid (2) collected in the receiving area (10) of the first body component (8) during the dip bath treatment of the motor vehicle body (1) can be guided via the drainage system (13) to the drainage opening (12) of the second body component (9) in order to discharge the fluid (2) from the assembly (4) via the drainage opening (12). [10] Assembly (4) according to one of the preceding claims, characterized by that the fluid (2) flowing through the drainage system (13) can be guided via the drainage system (13) in the vehicle longitudinal direction (29) to the rear to the drainage opening (12).

Images