Electric vehicle with an arrangement for fastening a head-up display and the arrangement of a head-up display in an electric vehicle

Description

[0001] The invention relates to an arrangement for fastening an augmented reality head-up display in an electric vehicle, comprising a module cross member, a support part fastened to the module cross member or connected thereto, two holders for the head-up display which are fastened to the support part and to the module cross member, spaced apart from one another and aligned parallel, each having a free end part directed towards a front bulkhead of a body, which is connected to the bulkhead, wherein the holders extend in an X-direction, namely in the longitudinal direction of the vehicle, and have interfaces for connecting (fastening) the head-up display, wherein the support part can be penetrated by a steering column of the electric vehicle in the region of the holders fastened thereto.

[0002] So-called augmented reality head-up displays are well known. They are information instruments that augment real-world measurement data with additional text, images, or three-dimensional animations. This allows useful information and warnings to be projected directly into the windshield's field of view, within the system's limitations. These displays, known as HUDs for short, are about the size of a DIN A4 sheet, for example, allowing considerably more information to be projected into the windshield's field of view. In electric vehicles, these HUDs are mounted on the module crossmember so that the projection is directed onto the windshield of the equipped vehicle and visible to the driver. The installation volume of these HUDs is relatively large, so that a corresponding installation space must be available below the windshield on the module crossmember. In addition, the steering column must and can be guided past the installed HUD.The required space is available in electric vehicles because the engine compartment normally used in petrol or diesel vehicles is not occupied by any components in electric vehicles.

[0003] Such HUDs have proven themselves to be effective. However, there is a need for improvement. Currently, such HUDs are assembled using support components that serve as intermediaries between the module carriers and the HUD. These support components are often made of die-cast metal, particularly magnesium, for weight reasons. These materials are extremely expensive, and they also result in undesirable consumption of rare or expensive raw materials. In addition, special measures must be taken with such materials to ensure or increase dynamic rigidity in conjunction with HUD displays, as this is essential for the function and effectiveness of the HUD. This is especially true if such HUDs are to be used for autonomous driving in the future. In corresponding tests, specific targets for the HUD's natural frequencies and defined threshold levels must be observed.

[0004] It's also known that such supporting parts for HUDs can be manufactured from high-quality plastics that can withstand long-term loads, are durable at temperatures of approximately 80°C, and exhibit long-term stability. Such plastics are relatively expensive and critical in their application.

[0005] JP 2016 037216 A discloses a vehicle instrument panel structure comprising a head-up display housing for a head-up display device arranged within an instrument panel, wherein a heat sink is attached to the display housing.

[0006] JP 2019 217982 A discloses a steering member structure having a support member disposed between a main body of the steering member extending in a vehicle width direction and an instrument panel and supporting a head-up display device.

[0007] DE 10 2013 212 878 A1 discloses a cockpit structure of a vehicle with a cockpit cross member and a bodyshell cross member as well as a head-up display housing, in which a support structure from the cockpit cross member to the bodyshell cross member is created by means of the head-up display housing.

[0008] Based on this prior art, the invention seeks to create a corresponding arrangement for electric vehicles that allows for the intended arrangement or installation with relatively low weight and high dynamic rigidity, while also conserving scarce resources and ensuring long-term resilience. Since the corresponding installations are to be made between the passenger compartment of the respective vehicle and the bulkhead (bulkhead) of the vehicle, it is also important to ensure that sufficient energy absorption can be achieved and is ensured in the event of a frontal impact and subsequent intrusion of the bulkhead or bulkhead.

[0009] To achieve this object, the invention proposes that each holder consists of a shaped steel part formed from a flat steel sheet with a straight upper edge directed towards the front end of the vehicle in the longitudinal direction, and an angled lower edge also directed therein, wherein the holders have bevels directed away from one another on both longitudinal regions of the edge edges, wherein the first ends fastened to the support part are converging in the manner of a U-shaped profile and have first perforations for fastening means for fastening to the support part, and converge at the second ends facing away from the module carrier and each have a plate-like connecting strap on the end face, wherein the connecting straps form the interface (connection point) to the bulkhead,wherein supports for supporting and securing the head-up display are formed in the area of ​​the upper edges or their bevels.

[0010] The connecting tabs can be welded to the second ends.

[0011] Furthermore, the invention proposes an electric vehicle with such an arrangement, which has a body with at least two A-pillars, a module cross member connected to the A-pillars, a windshield connected to the body, a support member attached to the module cross member or connected thereto, two brackets for the head-up display attached to the support member and to the module carrier, spaced apart from one another and aligned parallel, each having a free end portion directed towards a front bulkhead of the body, which is connected to the bulkhead, wherein the brackets extend in the longitudinal direction of the electric vehicle and have interfaces for connecting (fastening) the head-up display, wherein the support member is penetrated by a steering column of the electric vehicle in the region of the brackets attached thereto, wherein each bracket consists of a molded steel part,which is formed from a flat steel sheet with a straight upper edge directed towards the front end of the vehicle in the longitudinal direction, and an angled lower edge also directed therein, wherein the holders have bevels directed away from one another on both longitudinal regions of the edge edges, wherein the first ends fastened to the support part converge in the manner of a U-shaped profile and have first perforations for fastening means for fastening to the support part, and converge at the second ends facing away from the module carrier and each have a plate-like connecting tab on the end face, wherein the connecting tabs form the interface (connection point) to the bulkhead, wherein supports for supporting and fastening the head-up display are formed in the region of the upper edges or their bevels.

[0012] The fact that the holder is made of sheet steel provides an environmentally friendly and highly resilient design solution. Steel has a significantly higher modulus of elasticity than, for example, magnesium or plastic, resulting in a rigid design that meets the requirements for dynamic rigidity. In particular, this reduces natural frequencies during intended use that can affect the HU display. The bevels also stiffen the holder. The specified shape also ensures that the holder uses minimal material. The support parts can be easily connected to the holder and the support part attached to the module carrier using fasteners such as screws. Plate-like connecting tabs are provided at the ends of the holders and form the connection point to the bulkhead.The connection can also be made with screws. The HU display, which can be attached to the brackets, has, for example, laterally protruding mounting tabs that can be placed on the supports of the upper edges or their bevels and secured with screws, for example, ensuring secure mounting of the HU display.

[0013] The selected shape and design as well as the fastening of the brackets also ensure that energy can be absorbed to a sufficient extent in the event of a frontal crash of the vehicle equipped with them and an intrusion of the front wall or bulkhead.

[0014] The corresponding HU display projects corresponding images through slots or openings in the area of ​​the dashboard or the like arranged above the HU display, so that the images generated by the HU display can be projected onto the windshield.

[0015] The selected steel sheet is preferably made of low-alloy structural steel, with other components of the respective holder being attached by welding.

[0016] It is preferably provided that the holder closer to the outside of the electric vehicle, i.e. closer to the door, has only one support for the head-up display.

[0017] It is also preferred that the holder which is further away from the outside of the electric vehicle, i.e. adjacent to the center of the vehicle, has two supports for the head-up display which are spaced apart from one another in the longitudinal direction.

[0018] This arrangement ensures a three-point support of the HU display on the holders, which enables easy and secure installation and ensures the holder with sufficient rigidity.

[0019] It is further preferably provided that each holder has, near the first end between the folds, the first holes for fastening means for connection to the supporting part of the module cross member.

[0020] This measure serves to securely position and attach the bracket to the respective supporting member. For the same reason, each bracket is provided with second holes near the angled lower edge, and also near the angle, for fastening devices for connection to the supporting member of the module cross member.

[0021] This arrangement ensures high positional stability and also high rigidity of the solution after the holders have been attached.

[0022] It is also preferably provided that the supports for the head-up display are made of plastic, preferably PP or PA, preferably reinforced with glass and / or carbon fibers, wherein the fiber filling proportion is preferably 30% + 5%.

[0023] This design ensures that vibrations that act on the holders during operation of the vehicle and when using the device are dampened, so that the transmission of vibrations from the holders to the HU display is largely prevented.

[0024] A preferred design from a manufacturing perspective and ensuring long-term load capacity is seen in the fact that the supports are made of injection-moldable material and each have a block body with an inserted thread on the bend of the upper edge of the holder, which is connected by casting technology via a cross on the holder to a counter bearing on the bend of the lower edge.

[0025] The supports are securely fixed in place by being molded onto the block body on the upper edge of the holder and by being connected to a counter bearing on the bevel of the lower edge via the cross section, thus ensuring permanent positional stability.

[0026] Furthermore, it is preferred that the plate-shaped holders are adjustable in the X and Z directions.

[0027] This adjustability allows for precise positioning of the HUD support surfaces.

[0028] In addition, it is preferably provided that threaded bushings made of stainless steel are inserted into the supports for fastening the head-up display.

[0029] This ensures the permanent attachment of the HU display to the supports.

[0030] Furthermore, it is preferably provided that at least one plate-like connecting strap has an interface or receptacle, in particular a centering bush, as a tolerance compensation element for a reference bolt which is fastened to the bulkhead or front wall of the vehicle.

[0031] Such a reference bolt is a centering bolt that helps with correct assembly.

[0032] This makes it easy to correctly adjust the fastening points on the bulkhead or front wall and to align the brackets precisely.

[0033] Furthermore, it is preferably provided that the steel parts are provided with a corrosion protection layer, preferably a galvanic zinc coating.

[0034] An embodiment of the invention is illustrated in the drawing and described in more detail below.

[0035] It shows: Figure 1 shows a representation of the essential details of the subject matter of the invention in an assembled position; Figure 2 shows an exploded view; Figure 3 shows the holders in individual view; Figure 4 shows a detail in elevation; Figures 5 and 6 show further details in elevation.

[0036] The drawing figures do not show the electric vehicle, but only the parts essential to the invention.

[0037] This is an arrangement for attaching an augmented reality head-up display 1, which, in the installed situation, is attached to the body by means of a module cross member 2 on the two A-pillars. A support part 3 is attached to the module cross member or connected to it. The module cross member 2 and the support part 3 have attachment options for the holders 4, 5 of the HU display 1, which will be described later. For this purpose, two tabs 6, which have attachment holes, are attached to the module cross member 2. Attachment holes 7 are also provided on the support part 3. The two holders 4, 5 for the HU display 1, which are aligned parallel to one another and arranged at a distance from one another, are attached to the support part 3 and the module carrier 2. The holders 4, 5 each have a free end part 8, 9 directed towards a front end wall or bulkhead of the body (not shown), which is connected to the bulkhead.

[0038] The brackets 4, 5 extend essentially in the direction of the vehicle's longitudinal axis, which is indicated by an "X" in the drawing. The brackets 4, 5 have interfaces for connecting and attaching the HU display 1. Furthermore, in the intended installation position, the supporting part 3 is penetrated by a steering column of the electric vehicle in the area of ​​the attached brackets 4, 5.

[0039] Each holder 4, 5 consists of a molded steel part made from a flat steel sheet with a straight upper edge 10, 11 directed towards the front end of the vehicle in the vehicle longitudinal direction X. Each approximately triangular holder 4, 5 also has a lower edge 12, 13 that runs at a right angle. The holders 4, 5 each have bevels 14, 15 and 16, 17 directed away from one another, so that the mutually facing surfaces of the holders 4, 5 are flat and only the angled bevels 14, 15, 16, 17 protrude outwards, so that a substantially flat contact surface is formed between the holders 4, 5 for the HU display 1.

[0040] The first ends 19, 20 of the holders 4, 5 fastened to the support part 3 form, with their peripheral edges 10, 11 and 12, 13, mutually converging regions which are brought together in the manner of a U-shaped profile in the end region 19, 20 and have first perforations 21, 22 for fastening to the support part 3 in the areas lying between the folded edges 14, 16 and 15, 17. The perforations 21, 22 are aligned approximately coaxially with the perforations of the tabs 6 so that fastening means can be guided and attached therethrough. The second ends of the holders 4, 5 facing away from the module cross member 2 have converging peripheral edges 10, 12 and 11, 13 and are each provided with a plate-like connecting tab 23, 24 on the end face. These connecting tabs 23, 24 form the interface (connection point) to the bulkhead (not shown). In the area of ​​the upper edges 10, 12, respectively.Supports 25, 26, 27 are formed on corresponding bevels 14, 15 for supporting and securing the HU display 1, for which purpose the HU display 1 has corresponding fastening projections 28, 29, 30. Corresponding holes for fastening devices are provided in these mutually corresponding components.

[0041] The holder 4, which is located further away from the outside of the electric vehicle in the transverse direction, i.e. in the Y direction, has two supports 25, 26 for the HU display 1, which are spaced apart from one another in the longitudinal direction.

[0042] The holder 5 closer to the outside of the electric vehicle has only one support 27 for the HU display 1. While each holder 4, 5 has the first holes 21, 22 for fastening means for connecting to the support part 3 or the module cross member 2 at the tabs 6 between the bevels 16, 19 and 17, 20, respectively, each holder 4, 5 has second holes 31, 32 for fastening means for connecting to the support part 3 of the module cross member 2 near the angled lower edge 12, 13, specifically in the area of ​​the bend. These holes correspond to the fastening holes 7 of the support part 3.

[0043] The supports 25, 26, and 27 for the HU display 1 are made of plastic, preferably PP or PA. This plastic is preferably reinforced with glass fibers and / or carbon fibers. The fiber filler content can preferably be in the range of 30% + 5%.

[0044] In addition, the supports 25, 26, 27 are made of injection-moldable material and each have a block body 14, 15 on the upper edge 10, 11 of the holder 4, 5, wherein a casting connection with a counter bearing 34, 35 on the bend 16 or 17 of the lower edge 12 or 13 is made via a cross 33 of the holder 4, 5.

[0045] The crossing is only possible in Figure 3 shown on the right. In Figure 3 On the left, it is located on the back of the holder 4. The counter bearings are located on the underside of the bend 16 and 17, respectively, or are formed there.

[0046] Threaded bushings made of stainless steel are preferably inserted into the supports 25, 26, 27 for fastening the HU display 1.

[0047] The plate-shaped connecting straps 23, 24 have tolerance compensation elements so that they can be aligned and fixed relative to the fastening point.

[0048] The plate-like connecting plate 23 has, as an interface or receptacle for a reference bolt, a centering bushing 36, preferably made of plastic, which is inserted into the corresponding receptacle 36'.

[0049] All steel parts of the specified solution are coated with a corrosion protection layer, preferably a galvanic zinc coating. Brackets 4 and 5, in particular, have a sheet thickness of preferably 0.8 mm to 2.0 mm.

[0050] In the Figure 1 The individual parts are shown in the assembled position, while in Figure 2 are shown in an exploded position to make the details more visible. In Figure 3 Holders 4 and 5 are shown individually with all necessary features. Figure 4 the centering bush 36 is shown, which is also in Figure 1 is shown. In Figure 5 the module cross member 2 with the supporting part 3 fixed to it is shown as a single part, while in Figure 6 An HU display 1 is shown. Essential components are shown only schematically and not in the form in which they are used in reality. This applies in particular to the HU display 1, the module cross member 2, and the supporting part 3.

[0051] The design according to the invention achieves, in particular, a high dynamic rigidity of the connection geometry for the HUD projector, so that it can project a vibration-free image onto the projection surface, namely the windshield of the vehicle.

[0052] The invention is not limited to the embodiment, but is variable in many ways within the scope of the disclosure.

[0053] All new individual and combination features disclosed in the description and / or drawing are considered essential to the invention. List of reference symbols:

[0054] 1 Head-up display 2 Module cross member 3 Supporting part on module support 4, 5 Holder for head-up display 6 Tabs 7 Fastening tabs 8, 9 Free end part of holders 4, 5 X Vehicle longitudinal direction Y Vehicle transverse direction 10, 11 Straight upper edge of holder 12, 13 Angled lower edge 14, 15, 16, 17 Folded sections 19, 20 First ends of holders 21, 22 First holes for fastening means on supporting part 23, 24 Connecting tab 25, 26, 27 Support on upper edge for head-up display 28, 29 30 Fastening projections 31, 32 Second holes for fastening means on supporting part 33 Crossing 34, 35 Counter bearing 36 Centering bush 36' Holder for 36

Claims

1. An arrangement for fastening an augmented reality head-up display (1) in an electric vehicle, comprising a module cross member (2), a support part (3) fastened to the module cross member (2) or connected thereto, two holders (4, 5) for the head-up display (1), which are fastened to the support part (3) and to the module cross member (2) and are aligned parallel to and at a distance from one another, which each have a free end part, which is directed towards a front bulkhead of a vehicle body and which is connected to the bulkhead, the holders (4, 5) extending in an X-direction, namely in the longitudinal direction of the vehicle, and having interfaces for connecting the head-up display (1), it being possible for a steering column of the electric vehicle to reach through the support part (3) in the region of the holders (4, 5) fastened thereto, characterized in that each holder (4, 5) consists of a shaped part made of steel, which is formed from a flat steel sheet with a straight upper marginal edge (10, 11), which is directed forwards in the X-direction, and an angled lower marginal edge (12, 13), which is also directed forwards, the holders (4, 5) having folded edges (14, 15, 16, 17) directed away from each other in the Y-direction, transversely to the X-direction, on both longitudinally extending regions of the marginal edges (10, 11, 12, 13), which converge at the first ends (19, 20) attached to the support part (3) in the manner of a U-shaped profile and have first perforations (21, 22) for fastening means for fastening to the support part, and converge at the second ends facing away from the module cross member (2) and each have a plate-like connecting tab (23, 24) at the front, the connecting tabs (23, 24) forming the interface to the bulkhead, seats (25, 26, 27) for supporting and fastening the head-up display (1) being formed in the region of the upper marginal edges (10, 11) or their folded edges (14, 15).

2. An electric vehicle with an arrangement according to claim 1, which has a body with at least 2 A-pillars, a windshield connected to the body, the module cross member (2) being connected to the A-pillars.

3. The electric vehicle according to claim 2, characterized in that the holder (5) located closer to the outside of the electric vehicle has only one seat (27) for the head-up display (1).

4. The electric vehicle according to claim 2 or 3, characterized in that the holder (4) located further away from the outside of the electric vehicle has two seats (25, 26) for the head-up display (1), which are spaced apart from one another in the longitudinal direction.

5. The electric vehicle according to one of claims 2 to 4, characterized in that each holder (4, 5) has, near the first end (19, 20) between the folded edges (14, 15, 16, 17), the first perforations (21, 22) for fastening means for connection to the support part (3) of the module cross member (2).

6. The electric vehicle according to one of claims 2 to 5, characterized in that each holder (4, 5) has, near the angled lower marginal edge (12, 13) and indeed also near the angle, second perforations (31, 32) for fastening means for connection to the support part (3) of the module cross member (2).

7. Electric vehicle according to one of claims 2 to 6, characterized in that the seats (25, 26, 27) for the head-up display (1) are made of plastic, preferably PP or PA, preferably reinforced with glass and / or carbon fibers, the fiber filler content preferably being 30% ± 5%.

8. The electric vehicle according to one of claims 2 to 7, characterized in that the seats (25, 26, 27) are made of injection-moldable material and each have a block body with an inserted thread on the folded edge (14, 15) of the upper marginal edge (10, 11) of the holder (4, 5), which is connected by casting via a cross-piece (33) on the holder (4, 5) to a counter-support (34, 35) on the folded edge (16, 17) of the lower marginal edge (12, 13).

9. The electric vehicle according to one of claims 2 to 8, characterized in that the plate-shaped holders (4, 5) are adjustable in the X and Z directions.

10. The electric vehicle according to one of claims 2 to 9, characterized in that threaded bushes made of stainless steel are inserted into the seats (25, 26, 27) for fastening the head-up display (1).

11. The electric vehicle according to one of claims 2 to 10, characterized in that at least one plate-like connecting tab (23, 24) has an interface or receptacle, in particular a centering bush (36), as a tolerance compensation element for a reference bolt, which is fastened to the bulkhead or front wall of the vehicle.

12. The electric vehicle according to one of claims 2 to 11, characterized in that the steel parts are provided with an anti-corrosion coating, preferably a galvanic zinc coating.