Cross member, motor vehicle and method of installing a machine group

Abstract

The invention relates in particular to a cross member (18) for a ladder frame (10) of a motor vehicle, preferably a utility vehicle. The cross member (18) has an elongate carrier (46) having an upper side, a lower side and at least one through-hole (52, 54) connecting the upper side and the lower side. The cross member (18) has at least one elastomer bearing (48, 50) arranged in the at least one through-hole (52, 54) and configured to elastically support a motor unit (12), preferably having a traction battery, on the cross member (18). The integration of the at least one elastomer bearing (48, 50) into the at least one through-hole (52, 54) can achieve a high connection stiffness around the at least one elastomer bearing (48, 50).

Description

Technical Field

[0001] This invention relates to a crossbeam for a ladder frame (Leiterrahmen) of a motor vehicle, preferably a commercial vehicle. The invention also relates to motor vehicles, preferably commercial vehicles. Furthermore, the invention relates to a method for mounting a generator set, preferably having a traction battery, onto the ladder frame of a motor vehicle, preferably a commercial vehicle. Background Technology

[0002] Commercial vehicles can utilize a ladder frame as their chassis. A ladder frame has two parallel main longitudinal beams and multiple crossbeams connecting the main longitudinal beams. When assembling a commercial vehicle, the ladder frame can be assembled first. Different units can then be mounted on the ladder frame. In particular, mounting heavy-duty units to the crossbeams or longitudinal beams of the ladder frame may cause undesirable twisting of the entire ladder frame or undesirable stress at the unit's support points. It is also possible that mounting large units on a ladder frame is more difficult because there is very little mounting space available for the crossbeams.

[0003] DE 10 2015 225 282 A1 discloses a device for fixing a drive unit. A first bearing and a second bearing are arranged at a distance from each other on a crossbeam of a support structure along the lateral direction of the vehicle to support the weight of the drive unit suspended on the support structure. The first and second bearings can be constructed as elastomeric bearings.

[0004] EP 3 616 954 A1 discloses a truck having a rear axle, a ladder frame, and an electric drive unit. The first and second crossbeams of the ladder frame have an inverted U-shaped profile, which includes a receiving space in which at least one bearing for supporting the electric drive unit is arranged at least partially. The electric drive unit is mounted below on the first and second crossbeams. Summary of the Invention

[0005] The objective of this invention is to create an improved technique for mounting a generator set (preferably a traction battery) on a ladder frame of a motor vehicle, particularly in terms of improved ease of installation.

[0006] This task is solved by the features of the following scheme. Advantageous extensions are described in the specification.

[0007] One aspect of this disclosure relates to a crossbeam for a ladder frame of a motor vehicle, preferably a commercial vehicle (e.g., a truck or bus). The crossbeam has an elongated support body. The elongated support body has an upper side and a lower side. The elongated support body has at least one through-hole connecting the upper side and the lower side. The crossbeam also has at least one elastomeric bearing disposed in the at least one through-hole and configured to elastically support a unit, preferably having a traction battery, on the crossbeam.

[0008] Advantageously, integrating at least one elastomeric bearing into at least one through-hole achieves high connection stiffness (large surface contact) around the at least one elastomeric bearing, thereby enabling, for example, the elastic support of very heavy units. With the aid of the elastic support, the sensitive components of the unit can be decoupled from the vibration effects from the chassis and the elastic deformation from the ladder frame. Advantageously, integrating at least one elastomeric bearing into at least one through-hole of the load-bearing body allows for a relatively flat crossbeam, so that even large units can be elastically and suspended on at least one elastomeric bearing on the crossbeam. This also allows for new degrees of freedom when designing very large units, where, for example, the crossbeam is first pre-installed on the unit and then fixed together with the unit to the ladder frame.

[0009] In one embodiment, the at least one elastomeric bearing is press-fitted into the at least one through-hole and preferably additionally secured to the elongated carrier by means of a threaded connection. In this manner, a particularly durable and space-saving fixation of the elastomeric bearing can be preferably achieved. High connection stiffness can be achieved through the press-fitting.

[0010] For example, the at least one elastomeric bearing may have an elongated cross-section and two threaded through holes spaced apart from each other for fixing to the elongated carrier. The at least one elastomeric bearing can be fixed in the at least one through hole by means of cover plates covering the upper and lower sides. This can be achieved through both form-fit and force-fit mechanisms.

[0011] In another embodiment, the at least one through-hole is designed as an elongated hole, preferably oriented along the transverse axis of the elongated support. Advantageously, the elongated hole can provide increased mounting space for the elastomeric bearing without necessarily increasing the size of the support. Therefore, relatively large elastomeric bearings can preferably be accommodated in the elongated hole, thereby ultimately supporting relatively heavy units. Advantageously, the connection stiffness of the elastomeric bearing can also be increased through the elongated hole.

[0012] In another embodiment, the elongated support body has a widened cross-section and / or increased wall thickness in the region of the at least one through-hole. This preferably improves the load introduced into the elongated support body via the elastomeric bearing, and thus also allows for the support of relatively heavy units on the crossbeam.

[0013] In another embodiment, the elongated support body is designed as a solid body or with a closed profile. This advantageously allows the elastomeric bearing to be held very securely within the elongated support body, particularly when the elastomeric bearing is pressed in.

[0014] For example, the at least one elastomeric bearing may have (e.g., cylindrical) side surfaces that are supported substantially over the entire outer periphery in the at least one through-hole.

[0015] The cross-section of the at least one elastomeric bearing may substantially correspond to the cross-section of the at least one through hole, preferably along the entire height of the at least one elastomeric bearing.

[0016] Preferably, the at least one elastomeric bearing can be accommodated in the at least one through hole substantially along the entire height of the at least one elastomeric bearing.

[0017] The height of the at least one elastomer bearing may also substantially correspond to the length of the at least one through hole.

[0018] In one embodiment, the at least one through-hole has a first through-hole and a second through-hole. The at least one elastomeric bearing has a first elastomeric bearing and a second elastomeric bearing. The first elastomeric bearing is arranged (and, for example, supported, preferably entirely peripherally) within the first through-hole. The second elastomeric bearing is arranged (and, for example, supported, preferably entirely peripherally) within the second through-hole. Advantageously, this allows the unit to be secured to the two elastomeric bearings on two opposing longitudinal outer sides.

[0019] In another embodiment, the first and second elastomeric bearings are arranged on the outermost opposing ends of the elongated load-bearing body. Advantageously, this allows the unit to be carried on the opposing longitudinal outer sides of the elastomeric bearings, while the unit can still be designed to be relatively wide. Furthermore, the load induced by the unit can be introduced into the main longitudinal beams of the trapezoidal frame within a very short distance.

[0020] In another embodiment, the elongated support extends from a first end region through an intermediate region to a second end region (e.g., along the longitudinal axis of the support). The intermediate region has a smaller cross-section than both the first and second end regions. The first through-hole is arranged in the first end region, and the second through-hole is arranged in the second end region. This preferably allows for enlarged through-holes, thereby enabling larger elastomeric bearings that can support relatively heavy units. Relatively heavy units typically require large installation space, which can be achieved by arranging elastomeric bearings in the end regions. Preferably, this even allows for the connection of the relatively longitudinal outer sides of the unit to the elastomeric bearings, while the unit can still remain relatively wide.

[0021] Preferably, the middle region, the first end region, and the second end region together form an I-shape (an I-shape with serifs) in the top view.

[0022] For example, the first end region and the second end region may each have a substantially trapezoidal cross section (e.g., the longer parallel leg of two parallel legs having a trapezoidal shape pointing outwards), and / or the intermediate region may have a beam shape or a rod shape.

[0023] In another embodiment, the crossbeam further has a first fixing bracket, which is fixed at its end to a first fixing portion of the elongated carrier (e.g., a first end region) and configured to be fixed to a first main longitudinal beam of the trapezoidal frame. Alternatively or additionally, the crossbeam has a second fixing bracket, which is fixed at its end and opposite to the first fixing bracket to a second fixing portion of the elongated carrier (e.g., a second end region) and configured to be fixed to a second main longitudinal beam of the trapezoidal frame. Advantageously, this multi-part design allows for improved mounting of the crossbeam on the main longitudinal beam. The fixing brackets of the crossbeam can be pre-installed on the main longitudinal beam. The carrier can then be fixed to the fixing brackets, preferably already attached to the unit supported on the carrier. In the state of installation in the trapezoidal frame, the fixing brackets and the carrier can together form the crossbeam.

[0024] In another embodiment, the elongated support is mounted on a first fixed bracket and a second fixed bracket of the crossbeam. Advantageously, the support can be designed to be quite long in this way, which can have a favorable effect on the connection between the unit and the opposite ends of the support, as well as on introducing the load caused by the unit into the main longitudinal beam.

[0025] In one embodiment, the first fixing portion is arranged on both sides of the first through-hole and / or the first elastomeric bearing about the transverse axis of the carrier, preferably overlapping when viewed in the direction of the transverse axis. Alternatively or additionally, the second fixing portion may be arranged on both sides of the second through-hole and / or the second elastomeric bearing about the transverse axis of the carrier, preferably overlapping when viewed in the direction of the transverse axis. Preferably, this allows the elastomeric bearing to be placed very far to the outside on the elongated carrier, which, as already explained, is advantageous for connecting large and heavy units and can also improve the force introduction to the main longitudinal beam.

[0026] Another aspect of this disclosure relates to a motor vehicle, preferably a commercial vehicle (e.g., a truck or bus). The motor vehicle includes a trapezoidal frame as disclosed herein, having two parallel main longitudinal beams and a crossbeam, wherein the crossbeam is fixed between the two parallel main longitudinal beams. The motor vehicle also has a unit elastically and suspendably supported on at least one elastomeric bearing of the crossbeam. The motor vehicle may have advantages regarding the mounting and support of the unit, as explained with respect to the crossbeam.

[0027] In one embodiment, the unit includes a traction battery, power electronics, an air conditioning compressor, a cooling water pump, and / or a high-pressure heater. Therefore, the unit can advantageously have a large number of sensitive components within a single package, which can preferably be decoupled from vibrational effects from the chassis and elastic deformation from the ladder frame by means of crossbeams.

[0028] In another embodiment, the unit has two opposing longitudinal outer sides, each with a fixed bracket that secures the unit to one of the elastomeric bearings of the crossbeam. Therefore, it is unnecessary to fix the unit (only) to the crossbeam from the top. This can have a favorable effect on the support of the unit.

[0029] In another embodiment, the unit is additionally elastically supported on two parallel main longitudinal beams, preferably mounted on a trapezoidal frame and / or used to form an elastic four-point support for the unit on the trapezoidal frame. In this way, elastic support can preferably be provided that is also suitable for very heavy and large units.

[0030] In another embodiment, the unit has a first unit block and a second unit block connected to each other in a stepped configuration, wherein the first unit block is located at a higher position than the second unit block. The first unit block (e.g., having a traction battery) is arranged above the front axle of the motor vehicle, and the second unit block (e.g., having a traction battery) is at least partially arranged at the same height as the front axle. The stepped shape of the unit can advantageously enable very large and long units that span the front axle and can be elastically supported on a ladder frame.

[0031] It should be clearly pointed out that the stepped design of the unit is also disclosed herein as a separate aspect, that is, particularly independently of the construction of the ladder frame and crossbeams. For example, this aspect may relate to a motor vehicle, preferably a commercial vehicle (e.g., a truck or bus), which includes a unit having a first unit block and a second unit block connected to each other in a stepped configuration, wherein the first unit block is located at a higher position than the second unit block. The first unit block (e.g., having a traction battery) is arranged above the front axle of the motor vehicle, and the second unit block (e.g., having a traction battery) is at least partially arranged at the same height as the front axle.

[0032] Preferably, the first unit block and the second unit block can be connected by means of a connecting carrier, which, for example, has an H-shape in a top view and / or the upper side and longitudinal outer side of the unit block are fixed to the connecting carrier.

[0033] Preferably, the unit blocks may each have a substantially cuboid shape.

[0034] Another aspect of this disclosure relates to a method for mounting a unit on a ladder frame of a motor vehicle, preferably a commercial vehicle (e.g., a truck or bus), the unit preferably having a traction battery (and, for example, power electronics, an air conditioning compressor, a cooling water pump, and / or a high-pressure heater). The method includes providing a crossbeam as disclosed herein. The method includes pre-mounting the facility crossbeam onto the unit by means of at least one elastomeric bearing of the crossbeam to form a pre-mounting unit, preferably the crossbeam being above the unit. The method further includes mounting the pre-mounting unit onto the ladder frame.

[0035] This method can advantageously lead to improvements in the installation process. In particular, pre-installing the crossbeam on the unit can save installation steps on the assembly line. This can also preferably prevent unwanted stress on the elastomeric bearings during installation, since the frame tolerances and frame deformation of the trapezoidal frame are unaffected when the unit is secured to the elastomeric bearings in the crossbeam.

[0036] In one embodiment, the installation includes lowering the pre-installed unit between the two parallel main longitudinal beams of the trapezoidal frame until the elongated support of the crossbeam is positioned inside a fixed bracket fixed to the two parallel main longitudinal beams, and includes fixing the elongated support inside the fixed bracket fixed to the two parallel main longitudinal beams. Attached Figure Description

[0037] The preferred embodiments and features of the present invention described above can be combined with each other in any way. Further details and advantages of the present invention are described below with reference to the accompanying drawings.

[0038] Figure 1 A perspective view of an equipment having a trapezoidal frame and elastic supports according to an embodiment of the present disclosure is shown;

[0039] Figure 2 It shows Figure 1 A top view of an exemplary device;

[0040] Figure 3 It shows Figure 1 A detailed view of the front bearing of an exemplary device;

[0041] Figure 4 It shows Figure 1 A detailed view of the crossbeam of an exemplary device;

[0042] Figure 5 A side view of an exemplary device is shown, in which the main longitudinal beams and multiple crossbeams of the trapezoidal frame are hidden or not shown;

[0043] Figure 6 A top view of an exemplary device is shown, in which the main longitudinal beams and multiple crossbeams of the trapezoidal frame are hidden or not shown;

[0044] Figure 7 A perspective view of an exemplary device is shown, in which the main longitudinal beams and crossbeams of the trapezoidal frame are hidden or not shown; and

[0045] Figure 8 A perspective view shows the installation steps when mounting the pre-installed unit on the trapezoidal frame.

[0046] The embodiments shown in the figures are at least partially identical, such that similar or identical parts are given the same reference numerals, and their explanations also refer to the descriptions of other embodiments or figures to avoid repetition. Detailed Implementation

[0047] Figure 1 and 2 The diagram shows a ladder frame 10 and a unit 12 of a motor vehicle. The motor vehicle is preferably designed as a commercial vehicle, and particularly preferably as a truck or bus.

[0048] The trapezoidal frame 10 has two main longitudinal beams 14 and 16 and multiple crossbeams 18, 20, 22, and 24. The main longitudinal beams 14 and 16 are arranged parallel to each other with a gap. The crossbeams 18, 20, 22, and 24 are arranged parallel to each other with a gap. The crossbeams 18, 20, 22, and 24 connect the two main longitudinal beams 14 and 16 to each other. The multiple crossbeams 18, 20, 22, and 24 can preferably be fixed to the inside of the main longitudinal beams 14 and 16.

[0049] Unit 12 is mounted on a ladder frame 10. Unit 12 has a traction battery (pack), for example in the form of a high-voltage energy storage device. Unit 12 may preferably have additional components, such as power electronics, an air conditioning compressor, a cooling water pump, and / or a high-voltage heater. However, other units may also be supported on the ladder frame 10 using the techniques disclosed herein for mounting traction batteries on the ladder frame 10. Unit 12 supported on the ladder frame 10 may alternatively or additionally have, for example, a drive unit, a transmission, and / or a cooling system.

[0050] In a preferred embodiment, unit 12 has two unit blocks 26 and 28. Unit 12 may also have only one block, more than two blocks, or no block shape at all.

[0051] Unit blocks 26 and 28 may each have a substantially cuboid shape. Preferably, each of the two unit blocks 26 and 28 includes a portion of the traction battery of unit 12.

[0052] Unit blocks 26 and 28 are preferably connected to each other in a stepped configuration. The first unit block 26 may be located higher than the second unit block 28. The first unit block 26 can therefore be positioned above the front axle 30 (in... Figure 1 (Illustrated schematically). The second unit block 28 can be arranged at least partially at the same height as the front axle 30.

[0053] Unit blocks 26 and 28 can be interconnected by means of at least one connecting carrier 32, particularly preferably in a stepped configuration. The connecting carrier 32 can connect unit blocks 26 and 28 on their longitudinal outer sides. For this purpose, the connecting carrier 32 can be fixed to the opposite longitudinal outer sides of the first unit block 26 and the opposite longitudinal outer sides of the second unit block 28. Additionally or alternatively, the connecting carrier 32 can connect the rear side (relative to the forward direction of travel of the vehicle) of the first unit block 26 to the front side (relative to the forward direction of travel of the vehicle) of the second unit block 28. For this purpose, the connecting carrier 32 can be fixed to the rear side of the unit block 26 and the front side of the second unit block 28. The connecting carrier 32 particularly preferably fixes the two longitudinal outer sides and the rear side of the first unit block 28 to the two longitudinal outer sides and the front side of the second unit block 28. Preferably, the connecting carrier 32 can have an H-shape in a top view (see, for example, [reference needed]). Figure 2 ).

[0054] The following will refer to Figures 1 to 8 Describe how the unit 12 is supported on the trapezoidal frame 10.

[0055] Unit 12 is elastically supported on the trapezoidal frame 10. Unit 12 is preferably elastically supported on the trapezoidal frame 10 with a so-called four-point support. Preferably, two elastic support points may be arranged in the front region of unit 12 and / or on the first unit block 26. Two additional elastic support points may be arranged in the rear region of unit 12 and / or on the second unit block 28. Unit 12 may also be elastically supported on the trapezoidal frame 10 with more or fewer support points (e.g., three-point or six-point support). The elastic support of unit 12 may preferably be designed to support in the supercritical range (a natural frequency higher than the axle's excitation range, an operating point adapted (optimized) in terms of lane excitation load and ride comfort).

[0056] Unit 12, preferably its first unit block 26, can preferably be elastically supported on the main longitudinal beams 14, 16. Fixing brackets 34, 36 can be fixed to the longitudinal inner side of the main longitudinal beams 14, 16, preferably by means of threaded connections. Fixing brackets 34, 36 can each have a receiving portion, preferably a through hole, in which elastomeric bearings 38, 40 are respectively arranged. Elastomeric bearings 38, 40 can, for example, be pressed into the respective receiving portion and / or threadedly connected to the respective fixing brackets 34, 36. Fixing brackets 42, 44 can be fixed to the longitudinal outer side of unit 12, preferably the longitudinal outer side of its first unit block 26. Fixing brackets 42, 44 can support unit 12 on elastomeric bearings 38, 40. Specifically, the first fixing bracket 42 can fix the first longitudinal outer side of unit 12 to the elastomeric bearing 38 from above. The second mounting bracket 44 can secure the second longitudinal outer side of the unit 12, oriented opposite to the first longitudinal outer side, to the elastomeric bearing 40 from above. For example, mounting brackets 42 and 44 can be threadedly connected to the elastomeric bearings 38 and 40. Mounting brackets 42 and 44 are particularly preferably fixed to the upper side of the elastomeric bearings 38 and 40. Suitably, the unit 12 can therefore be lowered from above to be installed onto the elastomeric bearings 38 and 40.

[0057] Unit 12, preferably its second unit block 28, is elastically supported on a crossbeam 18, which will be referred to below in particular. Figures 4 to 6 Detailed description. The configuration of the crossbeam 18 is a particular feature of this disclosure. The crossbeam 18 can also be used as a crossbeam of a ladder frame in other systems for the elastic support of the unit, preferably a suspended support.

[0058] The crossbeam 18 can be constructed to be mirror-symmetric about a central vertical plane that extends perpendicular to the longitudinal axis of the crossbeam 18 (i.e. parallel to the other crossbeams 20, 22, 24) and divides the crossbeam 18 into two equal halves.

[0059] The crossbeam 18 has an elongated load-bearing body 46 and two elastomeric bearings 48 and 50.

[0060] The support body 46 has an upper side and a lower side. Two through holes 52 and 54 connect the upper and lower sides of the support body 46 to each other. The through holes are preferably designed as elongated holes oriented along the transverse axis of the support body 46. Elastomer bearings 48 and 50 are arranged in the through holes 52 and 54.

[0061] Specifically, a first elastomeric bearing 48 is disposed in a first through-hole 52. A second elastomeric bearing 50 is disposed in a second through-hole 54. The cross-sections of the elastomeric bearings 48 and 50 and the through-holes 52 and 54 may correspond to each other. The respective side surfaces of the elastomeric bearings 48 and 50 are preferably supported substantially over their entire outer periphery in the respective through-holes 52 and 54.

[0062] However, the support body 46 may also have more or fewer than two through holes, each containing an elastomeric bearing. For example, the support body of the beam may have only one elastomeric bearing arranged in one through hole of the beam. This through hole may, for example, be located at the center of the support body about its longitudinal axis.

[0063] Preferably, the support body 46 is designed as a solid body or has a closed profile. The support body 46 is preferably designed as a metal support body. The support body 46 may be constructed to be mirror-symmetric about a central vertical plane that extends perpendicular to the longitudinal axis of the support body 46 and divides the support body 46 into two equal halves.

[0064] The elastomeric bearings 48 and 50 are preferably pressed into the through holes 52 and 54. Alternatively or additionally, the elastomeric bearings 48 and 50 may be fixed in the through holes 52 and 54 by means of a threaded connection. For example, the elastomeric bearings 48 and 50 may be covered on the upper or lower side by a fixing plate, which is threaded to the respective elastomeric bearing 48 and 50 and has a larger cross-section than the respective through holes 52 and 54.

[0065] Two through holes 52 and 54 may be eccentrically arranged in the support body 46 about the longitudinal axis of the support body 46. The through holes 52 and 54 are preferably arranged in the regions of the support body 46 with a widened cross-section and / or increased wall thickness.

[0066] Specifically, a first through-hole 52 may be arranged in a first end region 56 of the support body 46. A second through-hole 54 may be arranged in a second end region 58 of the support body 46. The first end region 56 may be oriented opposite to the second end region 58. The support body 46 may extend along its longitudinal axis between the first end region 56 and the second end region 58. Starting from the middle region 60 of the support body 46, the cross-section of the support body 46 may widen towards the first end region 56 and towards the second end region 58. Suitably, the support body 46 may have a substantially I-shaped profile in a top view, wherein the two lateral legs of the I-shaped profile are formed by the end regions 56, 58, while the longitudinal leg is formed by the middle region 60. The end regions 56, 58 may preferably be substantially trapezoidal, wherein the longer of the two parallel legs points outward about the longitudinal axis of the support body 46.

[0067] As an alternative to or supplement to the through holes 52, 54, the end regions 56, 58 may also have fixing portions 62, 64, for example, in the form of multiple threaded plugs. The threaded plugs are preferably oriented in the vertical direction. The fixing portions 62, 64 can be arranged on both sides of the corresponding through holes 52, 54 about the transverse axis of the carrier 46. This allows the through holes 52, 54, and therefore the elastomeric bearings 48, 50, to be arranged as far outward as possible about the longitudinal axis of the carrier 46, for example, overlapping with the corresponding fixing portions 62, 64 when viewed in the transverse direction and / or at the height of the fixing portions 62, 64.

[0068] At least one recess or cavity may be arranged in the intermediate region 60 of the support body 46 to reduce weight. The intermediate region 60 may be designed to be substantially strip-shaped.

[0069] Optionally, the crossbeam 18 may have two fixing brackets 66, 68. The first fixing bracket 66 may be fixed to the first fixing portion 62, preferably from below and / or by means of multiple threads. The second fixing bracket 68 may be fixed to the second fixing portion 64, preferably from below and / or by means of multiple threads. The load-bearing body 46 is preferably mounted on the fixing brackets 66, 68. The fixing brackets 66, 68 are fixed to the two main longitudinal beams 14, 16, preferably on the inner side and / or by means of threads. However, the crossbeam 18 may also be directly fixed to the main longitudinal beams 14, 16 without fixing brackets 66, 68, for example by means of matching connecting portions 62, 64.

[0070] Unit 12, preferably a second unit block 28, is elastically supported on elastomeric bearings 48 and 50. Specifically, unit 12, preferably the second unit block 28, may have fixing brackets 70 and 72 on its two longitudinal outer sides, which are fixed to the respective longitudinal outer sides. The fixing brackets 70 and 72 may extend upward. The fixing brackets 70 and 72 may be fixed to the elastomeric bearings 48 and 50 from below. Specifically, the first fixing bracket 70 may fix the first longitudinal outer side of unit 12 to the first elastomeric bearing 48 from below. The second fixing bracket 72 may fix the second longitudinal outer side of unit 12, which is oriented opposite to the first longitudinal outer side, to the second elastomeric bearing 50 from below. For example, the fixing brackets 70 and 72 may be threadedly connected to the elastomeric bearings 48 and 50. Unit 12 can therefore be suspended and supported on the elastomeric bearings 48 and 50 by means of the fixing brackets 70 and 72.

[0071] The crossbeam 18 disclosed herein exemplifies an improved method for mounting the unit 12 on the trapezoidal frame 10, as described below.

[0072] Before the unit 12 is installed on the trapezoidal frame 10, the crossbeam 18 (preferably without fixing brackets 66, 68) is pre-installed separately on the unit 12, preferably above the unit 12. For this purpose, fixing brackets 70, 72 can be fixed to the elastomeric bearings 48, 50 already installed in the crossbeam 18. The unit 12 can thus form a pre-installation unit together with the crossbeam 18. The pre-installation unit may preferably additionally have two unit blocks 26, 28 and fixing brackets 42 and 44 for the unit blocks 26.

[0073] Before mounting the unit 12 onto the trapezoidal frame 10, the trapezoidal frame 10, having at least two of the main longitudinal beams 14, 16 and a plurality of crossbeams 20, 22, 24, is additionally pre-installed. Furthermore, mounting brackets 66, 68 for the crossbeams 18 may preferably be pre-installed on the longitudinal inner sides of the main longitudinal beams 14, 16. Additionally, mounting brackets 34, 36 and elastomeric bearings 38, 40 mounted on the mounting brackets may preferably be pre-installed on the longitudinal inner sides of the main longitudinal beams 14, 16.

[0074] Figure 8 An illustrative illustration shows how the pre-installation unit is subsequently mounted on the pre-installation trapezoidal frame 10. For this purpose, the pre-installation unit can preferably be raised and lowered into the pre-installation trapezoidal frame 10 such that the fixing portions 62, 64 are positioned on the fixing brackets 66, 68 and the fixing brackets 42, 44 are positioned on the elastomeric bearings 38, 40. Once the pre-installation unit is engaged with the fixing brackets 42, 44 and the elastomeric bearings 38, 40, the fixing portions 62, 64 can be secured to the fixing brackets 66, 68, and the fixing brackets 42, 44 can be secured to the elastomeric bearings 38, 40.

[0075] This invention is not limited to the preferred embodiments described above. Instead, numerous variations and modifications are possible, which also utilize the spirit of this invention and therefore fall within the scope of protection.

[0076] List of reference numerals

[0077] 10 Trapezoidal Frame

[0078] 12 units

[0079] 14 Main longitudinal beams

[0080] 16 Main longitudinal beams

[0081] 18 crossbeams

[0082] 20 crossbeams

[0083] 22 Crossbeams

[0084] 24 crossbeams

[0085] 26 Unit Block

[0086] 28 Unit Block

[0087] 30 front axle

[0088] 32 Connecting carrier components

[0089] 34 Fixed bracket

[0090] 36 Fixed bracket

[0091] 38 Elastomer Bearings

[0092] 40 Elastomer Bearing

[0093] 42 Fixed bracket

[0094] 44 Fixed bracket

[0095] 46. ​​Elongated load-bearing structure

[0096] 48 Elastomer Bearings

[0097] 50 Elastomer Bearing

[0098] 52 Through Hole

[0099] 54 Through Hole

[0100] 56-end area

[0101] 58-end area

[0102] 60 Middle Area

[0103] 62 Fixed part

[0104] 64 Fixed parts

[0105] 66 Fixed bracket

[0106] 68 Fixed bracket

[0107] 70 Fixed bracket

[0108] 72 Fixed bracket

Claims

1. A crossbeam (18) for a trapezoidal frame (10) of a motor vehicle, said crossbeam having: Elongated support body (46), the elongated support body having: - Top and bottom; and - At least one through hole (52, 54) connecting the upper side and the lower side; At least one elastomeric bearing (48, 50) is arranged in the at least one through hole (52, 54) and is configured to elastically support the unit (12) on the crossbeam (18).

2. The crossbeam (18) according to claim 1, wherein: The at least one elastomeric bearing (48, 50) is pressed into the at least one through hole (52, 54).

3. The crossbeam (18) according to claim 1 or claim 2, wherein: The at least one through hole (52, 54) is designed as an elongated hole.

4. The crossbeam (18) according to claim 1 or claim 2, wherein: The elongated support (46) is reinforced and / or has an increased wall thickness in the region of the at least one through hole (52, 54); and / or The elongated support (46) is designed to be solid or have a closed profile.

5. The crossbeam (18) according to claim 1 or claim 2, wherein: The at least one through hole (52, 54) has a first through hole (52) and a second through hole (54); The at least one elastomeric bearing (48, 50) has a first elastomeric bearing (48) and a second elastomeric bearing (50). The first elastomeric bearing (48) is disposed within the first through hole (52); and The second elastomeric bearing (50) is arranged in the second through hole (54).

6. The crossbeam (18) according to claim 5, wherein: The first elastomeric bearing (48) and the second elastomeric bearing (50) are arranged on the outermost opposite ends of the elongated support (46).

7. The crossbeam (18) according to claim 5, wherein: The elongated support (46) extends from the first end region (56) through the middle region (60) to the second end region (58). The intermediate region (60) has a smaller cross-section than the first end region (56) and the second end region (58); The first through hole (52) is disposed within the first end region (56); and The second through hole (54) is arranged in the second end region (58).

8. The crossbeam (18) according to claim 5, wherein: The crossbeam (18) also has a first fixed bracket (66), which is fixed at the end to the first fixed part (62) of the elongated support (46) and is configured to be fixed to the first main longitudinal beam (14) of the trapezoidal frame (10); as well as The crossbeam (18) also has a second fixed bracket (68), which is fixed at the end and opposite to the first fixed bracket (66) on the second fixed part (64) of the elongated support (46) and is configured to be fixed on the second main longitudinal beam (14) of the trapezoidal frame (10).

9. The crossbeam (18) according to claim 8, wherein: The elongated support (46) is mounted on the first fixed bracket (66) and the second fixed bracket (68) of the crossbeam (18); and / or The first fixing portion (62) is arranged on both sides of the first through hole (52) and / or the first elastomeric bearing (48) about the transverse axis of the carrier (46); and / or The second fixing part (64) is arranged on both sides of the second through hole (54) and / or the second elastomeric bearing (50) about the transverse axis of the carrier (46).

10. The crossbeam (18) according to claim 1, wherein: The motor vehicle in question is a commercial vehicle.

11. The crossbeam (18) according to claim 1, wherein: The unit (12) has a traction battery.

12. The crossbeam (18) according to claim 2, wherein: The at least one elastomeric bearing (48, 50) is additionally fixed to the elongated carrier (46) by means of a threaded connection.

13. The crossbeam (18) according to claim 3, wherein: The elongated hole is oriented along the transverse axis of the elongated support (46).

14. The crossbeam (18) according to claim 9, wherein: The first fixed portion (62) is arranged overlapping on both sides of the first through hole (52) and / or the first elastomeric bearing (48) when viewed in the direction of the transverse axis of the carrier (46).

15. The crossbeam (18) according to claim 9, wherein: The second fixing part (64) is arranged overlapping on both sides of the second through hole (54) and / or the second elastomeric bearing (50) when viewed in the direction of the transverse axis of the carrier (46).

16. A motor vehicle, the motor vehicle comprising: A trapezoidal frame (10) having two parallel main longitudinal beams (14, 16) and a crossbeam (18) according to any one of the preceding claims, wherein the crossbeam (18) is fixed between the two parallel main longitudinal beams (14, 16); and Unit (12) is elastically and suspendedly supported on at least one elastomeric bearing (48, 50) of the crossbeam (18).

17. The motor vehicle according to claim 16, wherein: The unit (12) has a traction battery, power electronics equipment, air conditioning compressor, cooling water pump and / or high-pressure heater.

18. The motor vehicle according to claim 16 or 17, wherein: The unit (12) has two opposing longitudinal outer sides, each having a fixed bracket (70, 72), which respectively fixes the unit (12) to one of the elastomeric bearings (48, 50) of the crossbeam (18); and / or The unit (12) is additionally elastically supported on two parallel main longitudinal beams (14, 16).

19. The motor vehicle according to claim 16 or 17, wherein: The unit (12) has a first unit block (26) and a second unit block (28) connected to each other in a stepped manner, wherein the first unit block (26) is located at a higher position than the second unit block (28); The first unit block (26) is arranged above the front axle (30) of the motor vehicle; and The second unit block (28) is arranged at least partially at the same height as the front axle (30).

20. The motor vehicle according to claim 18, wherein: The unit (12) is additionally elastically supported on two parallel main longitudinal beams (14, 16), mounted on a trapezoidal frame (10) and / or used to form an elastic four-point support for the unit (12) on the trapezoidal frame (10).

21. A method for mounting a unit (12) on a ladder frame (10) of a motor vehicle, the method comprising: Provide a crossbeam (18) according to any one of claims 1 to 15; The crossbeam (18) is pre-installed on the unit (12) by means of at least one elastomeric bearing (48, 50) to form a pre-installation unit; and The pre-installed unit is installed on the trapezoidal frame (10).

22. The method of claim 21, wherein mounting the pre-installed unit on the trapezoidal frame (10) comprises: The pre-installed unit is lowered between the two parallel main longitudinal beams (14, 16) of the trapezoidal frame (10) until the elongated support (46) of the crossbeam (18) is placed inside the fixed brackets (66, 68) fixed on the two parallel main longitudinal beams (14, 16); as well as The elongated support (46) is fixed to the inside of the fixing brackets (66, 68) on the two parallel main longitudinal beams.

23. The method according to claim 21, wherein: The unit is equipped with a traction battery.

24. The method of claim 21, wherein: The crossbeam (18) is pre-installed on the unit (12) by means of at least one elastomeric bearing (48, 50) to form a pre-installation unit, the crossbeam (18) being above the unit (12).

Images