Motor vehicle body in white, especially for a passenger car, and motor vehicle, especially a passenger car

Abstract

The invention relates to a motor vehicle body in shell, comprising a frame structure (24) formed by transverse beams (12, 14) of the motor vehicle body in shell (10) spaced apart from each other in the longitudinal direction of the vehicle and longitudinal beams (16, 18) of the motor vehicle body in shell (10) spaced apart from each other in the transverse direction of the vehicle and projecting downwardly from a floor part (20) of the motor vehicle body in shell (10) in the vertical direction of the vehicle, the frame structure defining a receiving space (26) for receiving an energy storage device (28), the motor vehicle body in shell also comprising a cover (36) formed separately from the frame structure (24) and opposite the floor part (20) and closing the receiving space (26) in the vertical direction of the vehicle downwardly, wherein a dimensionally stable annular intermediate part (38) is arranged between the frame structure (24) and the cover (36) and is fixed to the frame structure (24) by means of at least a materially bonded connection in at least a liquid-tight manner.

Description

Technical Field

[0001] The invention relates to a motor vehicle body-in-shell, in particular for a passenger car. The invention also relates to a motor vehicle, in particular a passenger car, having such a motor vehicle body-in-shell. Background Art

[0002] Such a motor vehicle body in white for a motor vehicle, in particular a passenger car, is disclosed by DE 10 2017 219 895 A1. The motor vehicle body in white has a frame structure, which is formed by transverse beams of the motor vehicle body in white that are spaced apart from each other in the longitudinal direction of the vehicle and longitudinal beams of the motor vehicle body in white that are spaced apart from each other in the transverse direction of the vehicle. The frame structure is closed all around and protrudes downward from a floor member of the motor vehicle body in white in the vertical direction of the vehicle. A receiving space is defined by the frame structure for at least partially receiving an electric storage device. The motor vehicle body in white also includes a cover that is formed separately from the frame structure and is opposite to the floor member in the vertical direction of the vehicle and is spaced apart from the floor member, thereby closing or covering the receiving space downward in the vertical direction of the vehicle. Summary of the invention

[0003] The object of the present invention is to provide a motor vehicle body shell and a motor vehicle in which the receiving space can be sealed in a particularly advantageous manner.

[0004] This object is achieved according to the invention by a motor vehicle body shell having the features described below and a motor vehicle having the features described below. Advantageous embodiments with suitable inventive developments are also described below.

[0005] The motor vehicle body-in-shell, also referred to as a body frame, body-in-shell, body-load-bearing structure or body, and preferably in the form of a self-supporting body, preferably delimiting a passenger interior for a motor vehicle, preferably in the form of a sedan, comprises a frame structure, which is formed by transverse beams of the motor vehicle body-in-shell spaced apart from each other in the longitudinal direction of the vehicle and longitudinal beams of the motor vehicle body-in-shell spaced apart from each other in the transverse direction of the vehicle, such as side sills, and is enclosed / continuously enclosed. This means that the frame structure is formed completely enclosed / continuously enclosed along its circumference by the transverse beams and longitudinal beams, so that the frame structure can be designed at least essentially in the form of a ring. The transverse beams are, for example, separate from each other and are formed separately from the longitudinal beams, wherein the longitudinal beams are, for example, separate from each other. The transverse beams and longitudinal beams are also collectively referred to as beams of the motor vehicle body-in-shell, wherein the beams can be connected to each other at least indirectly, in particular directly. It is particularly conceivable that the transverse beams are connected to each other via the longitudinal beams, or vice versa, wherein, for example, the respective longitudinal beams can be connected to the respective transverse beams at least indirectly, in particular directly.

[0006] The frame structure protrudes downward from a floor part of the motor vehicle body in white in the vertical direction of the vehicle. The floor part is, for example, a component of a floor of the motor vehicle body in white, also referred to as a main floor, wherein the aforementioned interior chamber is at least partially, in particular at least mainly or completely, delimited downward in the vertical direction of the vehicle by the floor part. The receiving space is at least partially delimited by the frame structure, in particular in a completely surrounding manner along the circumference of the receiving space. An accumulator can be or is accommodated in the receiving space. With the aid of the accumulator, power or current that can be supplied to at least one motor, in particular a purely electrically driven motor vehicle, can be supplied. The receiving space is delimited or closed upward in the vertical direction of the vehicle by the floor part. For example, the accumulator is designed as a high-voltage battery, whereby a very high electrical power can be achieved for a purely electrically driven motor vehicle, in particular.

[0007] The motor vehicle body-in-white also includes a cover designed to be separated from the frame structure and therefore separated from the longitudinal beam and separated from the cross beam, and the cover is opposite to the bottom plate member in the vertical direction of the vehicle and is spaced apart from the bottom plate member. Through the cover, the accommodation space is closed downward in the vertical direction of the vehicle, and is therefore defined or isolated. In order to be able to seal the accommodation space very advantageously now, according to the present invention, a shape-stable ring-shaped middle piece designed to be separated from the frame structure and separated from the cover is arranged between the frame structure and the cover in the vertical direction of the vehicle, and the middle piece is also called an adapter or is also called a ring-shaped structure because of its ring-shaped design. In other words, the middle piece is completely closed around its circumference. The middle piece is fixed to the frame structure at least in a liquid-tight / liquid-tight manner by means of at least a material joint connection. This means that the middle piece is connected to the frame structure in a material joint manner by means of a material joint connection, and is thus fixed to the frame structure in a material joint manner. In addition, the middle piece is sealed relative to the frame structure in a liquid-tight manner by means of a material joint connection, so that liquids such as water cannot flow from the outside into the frame structure and the middle piece and enter the accommodation space.

[0008] The present invention is based on the following recognition, that is, there is a joint, especially a butt joint, between the corresponding longitudinal beam and the corresponding cross beam, because for example the corresponding longitudinal beam is placed on the corresponding cross beam and connected to the corresponding cross beam when forming a respective joint, especially in the form of a butt joint. In addition, a step portion determined by the processing tolerance may appear at the corresponding transition between the longitudinal beam and the cross beam, especially in the area of ​​the edge surface to be sealed. If corresponding countermeasures are not taken, the joint and the step portion that may exist are difficult to make the sealing quality of the accommodation space, which is called the structural space, consistent with the surrounding environment, especially in the mass production of vehicles. In contrast, the middle piece now allows the structural space to be sealed with consistent high quality, especially in mass production or mass production. The middle piece, which is also called a ring-shaped structure based on its ring-shaped design, can bridge the joint and the step portion so that it does not adversely affect the sealing of the accommodation space. In particular, the middle piece bridges the corresponding joint in such a way that the one-piece wall portion of the middle piece extends continuously from one beam to another beam and simultaneously across the joint between one beam and another beam, that is, extends without interruption.

[0009] By means of the material connection, the respective wall or the ring-shaped structure can be fastened to the frame structure overall at least in a liquid-tight manner, i.e. at least in a liquid-tight manner, so that a very advantageous sealing of the receiving space can be achieved. The cover can also be sealed very easily relative to the intermediate piece, for example, so that a consistently high sealing quality of the structural space can be ensured even in mass production.

[0010] In one embodiment of the invention, the middle piece is arranged on the corresponding surface of the longitudinal beam and the cross beam facing downward in the longitudinal direction of the vehicle. Here, for example, the middle piece is placed on the corresponding surface. As a result, the middle piece can be sealed very advantageously relative to the frame structure, thereby ensuring a very advantageous sealing of the accommodation space.

[0011] Another embodiment is characterized in that the integral connection is arranged in the vehicle vertical direction between the surface and the intermediate part. As a result, the surface, also referred to as the frame structure surface, can be very well sealed at least in a liquid-tight manner, so that the receiving space can also be very well sealed, in particular when there are joints between beams and steps caused by tolerances in the frame structure.

[0012] In a particularly advantageous embodiment of the invention, the middle piece forms a sealing surface that is closed all around and faces downward in the vertical direction of the vehicle, and a sealing element, which is especially formed separately from the cover and separately from the middle piece, is directly supported, i.e. abuts against this sealing surface. With the aid of this sealing element, the cover is sealed at least in a liquid-tight manner relative to the middle piece. The middle piece itself is therefore well sealed at least in a liquid-tight manner relative to the frame structure by means of a material joint connection and is simultaneously fixed to the frame structure by means of a material joint connection, so that the seams and any steps that may exist are bridged or compensated, and the adapter or middle piece provides a surrounding sealing surface. For example, the sealing element is brought into contact with the sealing surface, and the sealing element is then located between the sealing surface of the middle piece and the cover. Since the sealing surface against which the sealing element abuts is formed by the middle piece and not, for example, by the frame structure, this sealing surface is subject to significantly weaker tolerances. This allows the accommodation space to be well sealed.

[0013] In order to achieve a very advantageous sealing of the receiving space in a particularly simple manner, in one embodiment of the invention it is provided that the sealing surface is at least substantially flat. In particular, the sealing surface preferably extends in a plane defined by the vehicle longitudinal direction and the vehicle transverse direction, also referred to as the xy plane.

[0014] It has also been found to be particularly advantageous if a seal, for example made of rubber, bears directly on one side or rests against the sealing surface and on the other side directly against another sealing surface formed by the cover, so that the structural space can be sealed with constant high quality, especially in series or mass production of vehicles.

[0015] In a further embodiment of the invention, the intermediate piece is made of high-strength steel, thereby achieving a very high sealing surface quality and thus a sealing quality of the installation space.

[0016] It has been shown that it is particularly advantageous that the middle piece is shaped and preferably joined into a closed component by roller dressing. Thus, the middle piece can be very advantageously sealed on one side relative to the frame structure and on the other side relative to the cover.

[0017] The intermediate part can be designed as a single piece, for example, or it can consist of a plurality of components which are designed separately from one another and are connected to one another.

[0018] In order to be able to seal the structural space well, in a further embodiment of the invention, it is provided that the intermediate part is painted together with the frame structure, in particular by cathodic electrophoretic coating (CTL). In other words, within the scope of the method for producing a motor vehicle body-in-white according to the invention, the ring-shaped structure is fastened to the frame structure in a workshop, for example, by forming a material connection and is sealed at least in a liquid-tight manner relative to the frame structure by means of the material connection. Subsequently, the frame structure and the intermediate part fastened thereto pass through an electrophoretic bath, whereby the frame structure and the intermediate part fastened thereto are painted together or simultaneously.

[0019] Finally, it has proven particularly advantageous that the material connection comprises welding and / or adhesive bonding between the frame structure and the intermediate part. In other words, it is preferably provided that the intermediate part is fixed to the frame structure by adhesive bonding and / or welding and is sealed at least in a liquid-tight manner relative to the frame structure. This ensures a good tightness of the structural space. Thus, for example, within the scope of the above-described method, it is provided that the ring-shaped structure is adhesively bonded and welded into or onto the frame structure in the vehicle workshop and then passes through the electrophoresis tank together with the frame structure.

[0020] The motor vehicle according to the invention, preferably designed as a passenger car, is characterized in that it has a motor vehicle body shell according to the invention. The advantages and advantageous configurations of the motor vehicle body shell according to the invention are to be regarded as advantages and advantageous configurations of the motor vehicle according to the invention and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Further advantages and details of the present invention are obtained from the following description in conjunction with the drawings, in which:

[0022] Figure 1 The invention shows a schematic exploded side view of a part of a motor vehicle body in white, which has a frame structure partially delimiting a receiving space for receiving an electric storage device, a cover which is designed to be separate from the frame structure and closes the receiving space in the vertical direction of the vehicle downward, and a ring-shaped structure which is arranged between the frame structure and the cover and is designed to be separate from the frame structure and the cover, and is fastened to the frame structure in an at least liquid-tight manner by means of at least a materially bonded connection;

[0023] Figure 2 The motor vehicle body in white is shown in an exploded schematic representation from below. DETAILED DESCRIPTION

[0024] exist Figure 1 , a detail of a motor vehicle body shell 10, also referred to as a body shell or body frame, for a motor vehicle, in particular a passenger car, is shown in an exploded side view. The motor vehicle body shell 10 at least partially delimits, for example, an interior of the motor vehicle, in which people can stay, in particular while the motor vehicle is moving.

[0025] Especially joint reference Figure 2 As can be clearly seen, the motor vehicle body 10 has transverse beams 12, 14 which are spaced apart from one another in the longitudinal direction of the vehicle. The motor vehicle body 10 also includes longitudinal beams 16, 18 which are spaced apart from one another in the transverse direction of the vehicle. The longitudinal beams 16, 18 are formed here by side sills, which are usually referred to as sills for short.

[0026] The motor vehicle body shell 10 further comprises at least one floor part 20, which is, for example, a component of a floor 22, also referred to as a main floor, of the motor vehicle body shell 10, or forms, in particular, the entire floor 22. In this case, in the finished state of the motor vehicle, its interior is delimited downward in the vertical direction of the vehicle at least partially, in particular at least predominantly or completely, by the floor part 22 or the floor 20. In this case, the floor part 20 can be connected at least indirectly, in particular directly, to the longitudinal beams 16, 18 and the cross beams 12, 14. The cross beams 12, 14 and the longitudinal beams 16, 18 are also referred to as beams. In this case, for example, the longitudinal beams 16 and 18 each form a side sill of the motor vehicle body shell 10. In another embodiment not shown in the figures, it is provided that the cross beams 12, 14 and the longitudinal beams 16, 18 are also components of the floor 22.

[0027] from Figure 2 It can be clearly seen that the transverse beams 12, 14 and the longitudinal beams 16, 18 form a closed frame structure 24 which is completely closed along its circumference. The frame structure 24 thus partially delimits a receiving space 26 in which an electric storage device 28 of the motor vehicle can be accommodated or held. The receiving space 26 is delimited upwards in the vertical direction of the vehicle by the floor panel 20, i.e., is closed or insulated. The frame structure 24 extends in a completely surrounding manner in the circumference of the receiving space 26, and thus extends in a closed manner, so that the receiving space 26 is delimited by the frame structure 24 on both sides in the transverse direction of the vehicle and in the longitudinal direction of the vehicle towards the front and rear.

[0028] The accumulator 28 comprises a plurality of modules 30 which are arranged in a receiving space 26, also referred to as a structural space. Each module 30 comprises, for example, a plurality of storage cells which are electrically connected to one another. With the aid of the storage cells and thus with the accumulator 28, electrical energy or current can be stored. In the finished state of the motor vehicle, the motor vehicle comprises at least one electric machine, by means of which the motor vehicle can be driven, in particular purely electrically. The motor vehicle is therefore preferably designed as a hybrid vehicle or an electric vehicle, in particular a battery electric vehicle (BEV).

[0029] In order to electrically drive the motor vehicle by means of the electric machine, the electric machine is supplied with electrical energy stored in the accumulator 28. For example, the accumulator 28 is designed as a battery, in particular a high-voltage battery (HV battery). It is also conceivable that at least one or more other electronic and / or electrical components are arranged in the receiving space 26, which are used, for example, for the electric drive of the motor vehicle and / or for supplying the electric machine with electrical energy stored in the accumulator 28. The receiving space 26 and thus the accumulator 28, for example, as a high-voltage accumulator, extend, for example, in the longitudinal direction of the vehicle from an end wall 32 of the motor vehicle body 10 to a rear compartment 34. In this case, for example, the interior is delimited at least partially in the longitudinal direction of the vehicle by the end wall 32. In particular, for example, the receiving space 26 extends in the longitudinal direction of the vehicle to the rear at least below a row of seats, which can then be arranged above a part of the receiving space 26 in the vertical direction of the vehicle.

[0030] Furthermore, a cover 36 is provided which is designed separately from the frame structure 24 and is located opposite the floor part 20 in the vehicle vertical direction and is spaced apart from the floor part 20. By means of the cover 36, the receiving space 26 is closed downward in the vehicle vertical direction, ie is delimited or isolated.

[0031] In order to be able to seal the receiving space 26 very advantageously, a dimensionally stable, i.e. inherently rigid, ring-shaped intermediate piece 38 is provided between the frame structure 24 and the cover 36 in the vertical direction of the vehicle, which is separate from the frame structure 24 and separate from the cover 36 and which completely surrounds and closes the receiving space 26 along its circumference and thus in the circumference of the receiving space 26. Due to its ring-shaped design, the intermediate piece 38, which is also referred to as an adapter, is also referred to as a ring-shaped structure. The intermediate piece 38 is fixed to the frame structure 24 at least in a liquid-tight manner by means of at least a material-bonded connection. As a result, liquids, such as water, cannot flow from the surroundings of the motor vehicle body shell 10 between the intermediate piece 38 and the frame structure 24 and into the receiving space 26.

[0032] In general, it can be Figure 1 and Figure 22, it can be seen that the frame structure 24 extends completely and thus closed around a first part of the receiving space 26 in the circumferential direction of the receiving space 26. The intermediate piece 38 adjoins the frame structure 24 downward in the vehicle vertical direction, so that the ring-shaped intermediate piece 38 extends completely and thus closed around a second part of the receiving space 26 in the circumferential direction of the receiving space 26, which second part adjoins the aforementioned first part downward in the vehicle vertical direction. The intermediate piece 38 is arranged on the respective surface 40 of the beams facing downward in the longitudinal direction of the vehicle and is in particular mounted on the surface 40. It is preferably provided that a material connection, not shown in detail in the figures, is arranged in the vehicle vertical direction between the surface 40 and the intermediate piece 38. By means of the material connection, the surface 40 is sealed at least in a liquid-tight manner relative to the intermediate piece 38, or vice versa, so that a good sealing can be achieved. By means of the intermediate piece 38, in particular the joints between the respective beams can be bridged, so that an advantageous sealing can also be achieved in the region of the respective joints. Here, the middle piece 38 forms a sealing surface 42 which is completely surrounding and thus closed in the circumferential direction of the receiving space 26 and faces downward in the vertical direction of the vehicle, and a sealing member 44 which is designed to be separate from the middle piece 38 and the cover 36 and is made of rubber, for example, is directly supported, that is, directly abuts against the sealing surface. The sealing member 44 is arranged between the sealing surface 42 and the cover 36 in the vertical direction of the vehicle, whereby the cover 36 is well sealed relative to the middle piece 38. As a result, the receiving space 26 can be well sealed relative to liquid from the surrounding environment.

[0033] In the embodiment shown in the figure, the sealing surface 42 is flat or at least substantially flat, wherein the sealing surface 42 extends in a plane defined by the vehicle transverse direction and the vehicle longitudinal direction, also referred to as the xy plane. The cover 36 is also preferably designed to be flat and to extend in the xy plane. The cover 36 preferably forms a further sealing surface 46 facing the sealing surface 42 and thus facing upward in the vertical direction of the vehicle. Here, the seal 44 faces upward in the vertical direction of the vehicle and thus directly bears on the sealing surface 42 on one side, and faces downward in the vertical direction of the vehicle and thus directly bears on the other side on the further sealing surface 46, so that a very simple and high-quality sealing of the receiving space 26 can be achieved.

[0034] The intermediate piece 38 is preferably made of high-strength steel and is shaped by roller dressing and preferably assembled into a closed component. It is particularly conceivable that the intermediate piece 38 is designed as a single piece. For example, the intermediate piece 38 is formed from a single-piece component, in particular in such a way that the respective original free ends of the components are moved towards each other by the component shaping. The free ends are, for example, joined to each other, thereby forming a ring-shaped intermediate piece 38. In particular, the component is shaped by roller dressing.

[0035] In order to seal the intermediate piece 38 well relative to the frame structure 24, it is preferably provided that the intermediate piece 38 is fixed to the frame structure 24, in particular in a workshop for manufacturing the motor vehicle body-in-white 10, and is subsequently painted together or simultaneously with the frame structure 24. For this purpose, for example, the frame structure 24 together with the intermediate piece 38 mounted thereon is passed through a painting bath, in particular designed as an electrophoresis bath, into which the frame structure 24 and the intermediate piece 38 mounted thereon are immersed. Thus, for example, the frame structure 24 and the intermediate piece 38 mounted thereon are painted together and thus simultaneously by means of cathodic electrophoresis coating (CTL).

[0036] In order to ensure a high tightness of the receiving space 26, the material connection comprises, for example, welding and / or bonding between the frame structure 24 and the intermediate piece 38. Thus, for example, the intermediate piece 38 is bonded and welded into or onto the frame structure 24 within the scope of the aforementioned method.

Claims

1. A motor vehicle body in shell, comprising a frame structure (24) formed by transverse beams (12, 14) of the motor vehicle body in shell (10) spaced apart from each other in the longitudinal direction of the vehicle and longitudinal beams (16, 18) of the motor vehicle body in shell (10) spaced apart from each other in the transverse direction of the vehicle, which is closed all around and projects downwardly from a floor panel (20) of the motor vehicle body in shell (10) in the vertical direction of the vehicle, the frame structure defining a receiving space (26) for receiving an electric storage device (28), the motor vehicle body in shell also comprising a cover (36) formed separately from the frame structure (24) and arranged opposite the floor panel (20) and closing the receiving space (26) downwardly in the vertical direction of the vehicle, Its characteristics are: A dimensionally stable annular intermediate part (38) is provided between the frame structure (24) and the cover (36), which is designed separately from the frame structure (24) and the cover (36) and is fixed to the frame structure (24) at least in a fluid-tight manner by means of at least a materially bonded connection. The intermediate piece (38) forms a closed all-around sealing surface (42) facing downward in the vertical direction of the vehicle, on which a sealing element (44) of the sealing cover (36) is directly supported at least in a liquid-tight manner relative to the intermediate piece (38).

2. The vehicle body-in-white according to claim 1, characterized in that: The intermediate part (38) is arranged on respective surfaces (40) of the longitudinal beams (16, 18) and of the transverse beams (12, 14) which face downward in the longitudinal direction of the vehicle.

3. The vehicle body-in-white according to claim 2, characterized in that: The integral connection is arranged in the vehicle vertical direction between the surface (40) and the intermediate part (38).

4. The motor vehicle body-in-white according to any one of claims 1 to 3, characterized in that: The sealing surface (42) is flat.

5. The motor vehicle body-in-white according to any one of claims 1 to 3, characterized in that: The seal (44) is supported on one side directly on the sealing surface (42) and on the other side directly on a further sealing surface (46) formed by the cover (36).

6. The motor vehicle body-in-white according to any one of claims 1 to 3, characterized in that: The intermediate part (38) is made of high-strength steel and / or is formed by roller shaping and / or consists of a plurality of components which are formed separately and connected to one another.

7. The motor vehicle body-in-white according to any one of claims 1 to 3, characterized in that: The intermediate piece (38) is painted together with the frame structure (24).

8. The vehicle body-in-white according to claim 7, characterized in that: The intermediate part (38) is painted together with the frame structure (24) by cathodic electrophoresis.

9. The motor vehicle body-in-white according to any one of claims 1 to 3, characterized in that: The material-bonded connection includes welding and / or adhesive bonding between the frame structure (24) and the intermediate part (38).

10. A motor vehicle having a motor vehicle body in shell (10) according to one of the preceding claims.

11. The motor vehicle according to claim 10, characterized in that: The motor vehicle is a passenger car.

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