Attachment chassis and road vehicle

Abstract

Mounting chassis for connection to a motorized towing head (2) at a mounting point (15), wherein the mounting chassis (4) comprises several parallel, profiled longitudinal beams (16) and a rear axle assembly (30), wherein the longitudinal beams (16) each have an upright support web (18) and a front mounting arrangement (22) for connection to the towing head (2) at the mounting point (15), and wherein the axle assembly (30) comprises one or more axles (31) each with an axle body (32) and one or more axle brackets (34) connected thereto for attachment to the longitudinal beams (16), characterized in that the longitudinal beams (16) are each divided lengthwise at the axle assembly (30) into two or more beam sections (40, 41), wherein the beam sections (40, 41) are each axially spaced apart at their ends forming a gap (42) and the axle body (32) in the gap (42) between the support sections (40,41) is arranged and wherein the support sections (40, 41) can be attached to or are attached to the axle blocks (34).

Description

[0001] The invention relates to an attachment chassis for a towing head with the features in the preamble of claim 1 and to a road vehicle equipped therewith with the features in the preamble of claim 27.

[0002] Such a mounting chassis with a rear-mounted axle arrangement and a front-mounted adapter for connection to a motorized, preferably front-wheel-drive, towing head at a mounting point is known from the generic patent DE 298 22 564 U1. The longitudinal beams are continuous along the axle arrangement.

[0003] The EP 1 634 798 B1 and DE 20 2005 006 305 U1 show a similar add-on chassis with continuous longitudinal beams on the axle arrangement.

[0004] DE 20 2018 006 084 U1 concerns an adjustable chassis for a trailer with a front V-drawbar and a rear axle arrangement. The axle arrangement is located on rear, continuous straight longitudinal beams, which are separated from angled longitudinal beams of the drawbar and are adjustable.

[0005] DE 101 40 921 A1 relates to a chassis for a front-wheel-drive commercial vehicle in which the track width can be increased and the wheelbase lengthened by means of a subframe. The axle assembly is mounted on the subframe and its continuous longitudinal beams.

[0006] GB 2 137 938 A also discloses a length-adjustable chassis for a motorized commercial vehicle with insertable longitudinal beam segments. The axle assembly is mounted on continuous longitudinal beams.

[0007] DE 26 07 154 C2 deals with a segmented trailer chassis in which the axle arrangement is mounted on continuous longitudinal beams, to which further longitudinal beams are attached at the front and rear.

[0008] From EP 3 088 282 A2, a mounting chassis for connection with a towing head and an adapter at a mounting point is also known. The longitudinal beams of the mounting chassis are higher than the chassis connection area of ​​the adapter.

[0009] DE 29 30 036 A1 shows a motorhome with a chassis formed by two frame groups. The front frame group, which supports the drive unit, has a downwardly stepped shape instead of an adapter.

[0010] The object of the present invention is to demonstrate a further improved chassis technology.

[0011] The invention solves this problem with the features of claims 1 and 27.

[0012] The chassis technology used, i.e., the add-on chassis and the road vehicle equipped with it, offers several advantages. In particular, a reduced overall height of the add-on chassis, a lowering of the add-on chassis, and a resulting lowering of the vehicle body are possible.

[0013] The longitudinal beams are lower than in the previously mentioned state of the art. This lower height allows for a low body position.

[0014] The height of the stressed longitudinal beams can be, for example, between 100 mm and 150 mm, preferably approximately 125 mm. The height of the stressed longitudinal beams can be, for example, approximately 90 mm less than the height commonly used in practice, e.g., according to DE 20 2005 006 305 U1, which is significantly over 200 mm. Accordingly, the structure of the stressed add-on chassis can be positioned approximately 90 mm lower than is typical in practice.

[0015] Lowering the vehicle's suspension offers several advantages. Firstly, it lowers the vehicle's center of gravity, which improves stability and driving dynamics. Secondly, it reduces the vehicle's height above the ground. This decreases the frontal area during driving, reduces drag, and improves aerodynamics. For sales vehicles and their counters, lowering the suspension is ergonomically beneficial. Thirdly, it can be used for other purposes, such as creating additional storage space in the floor area of ​​the vehicle body, for example, by forming a double floor. In this case, the vehicle body can maintain its standard roof height above the ground.

[0016] An adapter may be used to attach the mounting chassis and its longitudinal beams to the coupling head; this adapter may also have a height offset. An adapter is not strictly necessary. The longitudinal beams can also be mounted and attached directly to the coupling head frame. An adapter can be integrated in various ways. It may be an existing component of the coupling head. Alternatively, it may be an additional part positioned between the coupling head frame and the longitudinal beams. Such an adapter may be part of the mounting chassis or a separate unit.

[0017] The longitudinal beams can be attached and secured to the drawbar frame or adapter in any manner. A design described below, featuring a raised support at the front end of each longitudinal beam, offers particular advantages. However, other fastening and stabilization options are also available.

[0018] The longitudinal beams are preferably made of metal, in particular steel. Each longitudinal beam can have a single or multiple angled cross-section, in particular an L- or C-shaped cross-section, with an upright web and a top chord and / or bottom chord bent from it. The longitudinal beams can each have a laterally open cross-sectional shape. The longitudinal beams can each be designed as cut and bent thin-walled sheet metal components. The wall thickness can be, for example, between 2 and 4 mm.

[0019] The longitudinal beams of the mounting chassis are divided at one or more points into two or more beam sections, arranged one behind the other in the longitudinal or axial direction. This offers various advantages, such as reduced packing dimensions for transport, flexibility and modularity for length variations of the mounting chassis, and the possibility of increasing chassis stiffness despite the low longitudinal beam height, etc.

[0020] The carrier chassis features an axle assembly. The axle assembly, located at the rear of the mounting chassis, can comprise one or more axles of selectable design. Preferably, each axle is designed as a trailing arm axle, e.g., a longitudinal control arm axle with a straight and preferably tubular axle body and wheel links or rocker arms pivotally mounted thereon. The axles can be sprung, for example, by means of an axle suspension integrated into the axle tube, in particular a torsion bar or rubber suspension, and / or a coil spring suspension, air suspension, or the like arranged between the axle bracket and the wheel link. Furthermore, damping elements, in particular shock absorbers, can be fitted.

[0021] The separation point of the longitudinal beams is located in the area of ​​the axle assembly, wherein the beam sections are fixedly and preferably detachably connected to the axle assembly, in particular to the axle brackets of the axle assembly. The beam sections can be axially spaced apart from one another, forming a gap, and each can be independently connected to a common axle bracket. In the case of a tandem or triple axle, an additional beam section can be arranged between the axles and fixedly connected to their axle brackets.

[0022] This type of connection offers several advantages. Parts of the axle assembly, particularly the axle body, can be located at the level of the longitudinal beams and in the gap between their sections. The axle body can extend transversely through the split longitudinal beam. The height of the beam sections can correspond to the height or diameter of the axle body, or be slightly greater. Splitting the longitudinal beams with the axle body in the gap allows for a compact design and facilitates a reduction in the height of the longitudinal beams as well as a lower chassis position.

[0023] The axle bracket can bridge the separation point and the gap at the level of the support sections. Thanks to their independent attachment to the axle bracket, the longitudinal beams and the subframe still maintain high rigidity. Lowering the vehicle body is possible without compromising stability.

[0024] The axle supports can each have a stiffened, plate-like support profile. The support profile can extend to the lower edge and, if necessary, under the longitudinal beams and beam sections. The support profile can extend across the joint and the gap. It can connect and support the ends of the spaced beam sections. The ends of the spaced beam sections are each fixedly and preferably detachably connected or joined to the support profile.

[0025] The support profile is oriented transversely to the axle body and is attached to its end region. It has a receiving opening, preferably closed on its circumference, and a support projection for the axle body. The preferably wedge-shaped support projection extends from the axle body to the upper edge of the axle bracket, in particular the support profile, and is rigidly connected to the axle body and the support profile, in particular by welding.

[0026] The axle brackets, and in particular their support profiles, can be taller than the longitudinal beams and their sections. This creates an upright overhang of the axle brackets, especially their support profiles, relative to the shorter longitudinal beams and sections. This offers several advantages. Firstly, it provides better mounting options for damping and spring components, and also allows for modifications or retrofits. Secondly, the axle bracket height increases the area moment of inertia and the strength of the chassis in the axle area. In particular, the axle brackets, and especially their support profiles, can form a particularly rigid and load-bearing connection between the spaced-apart beam sections.

[0027] The mechanical strength of the chassis in the area of ​​the axle assembly can be further increased by strip-shaped stiffening elements on the aforementioned overhang of the axle brackets and / or by stiffening inserts in the longitudinal beams or beam sections at the connection point to the respective axle bracket. Screw nuts can be attached to the stiffening elements and / or stiffening inserts on the inside via through-holes, in particular by welding. This is advantageous for simplified subsequent installation of external attachments, e.g., air spring elements, leveling jack assemblies, or the like.

[0028] The longitudinal beams of the mounting chassis can each have a support extension extending in the longitudinal direction of the beam and projecting upwards and transversely to the longitudinal direction, the upper edge of which is positioned at a distance above the top flange of the longitudinal beam. The lower edge of the support extension can be flush with the lower edge or a bottom flange of the longitudinal beam. The fastening device is located at the support extension.

[0029] This chassis technology is advantageous for space- and weight-saving profiled longitudinal beams with a low web height, which, thanks to the upwardly projecting beam extension, can be attached particularly firmly, securely, and with high load-bearing capacity to the drawbar frame or an adapter. The beam extension can be an integral part of the respective longitudinal beam.

[0030] The beam attachment serves for mounting and fastening to the drawbar frame or adapter and can be optimized for this purpose. The direction of action of the fastening is oriented perpendicular to the longitudinal direction of the beam. The cross-sectional shape of the longitudinal beam changes in the area of ​​the beam attachment. The beam attachment can represent an extension of the beam web. Any top chord of the longitudinal beam may be shortened. It can end at or before the beam attachment.

[0031] The longitudinal beams of the attached chassis can be stiffened at the front end and at the connection point to the drawbar by a cross member. The cross member can, for example, be rigidly connected to the preferably plate-shaped and thin-walled beam extensions and support them laterally. The connection point between the beam extensions and the cross member can be further stabilized by a longitudinal stiffener. This is also advantageous for the mechanical stabilization of the transition point between the beam extensions and the adjoining longitudinal beam sections, in particular the upright beam webs.

[0032] The upward projection of the support bracket from the upper web edge or the top flange of the longitudinal beam allows for a height offset in the area of ​​the mounting chassis. This height offset, or distance between the upper edge of the support bracket and the web edge or top flange, allows the body to be lowered. This chassis-side height offset can be combined with any height offset from an adapter. By accumulating these height offsets, a particularly low body position is possible.

[0033] The projecting beam extension allows for a large mounting surface for the fastening arrangement, which engages at the beam extension and the attachment point, despite the low longitudinal beam height. Parts of the fastening arrangement, in particular one or more fasteners, can be located above the upper web edges or the top chords of the longitudinal beams. Advantageously, the beam extension can be integrally formed or attached to the vertical web of the longitudinal beams. In the claimed design, the longitudinal beams exhibit very high stability and fastening reliability at the tie rod end, despite the reduced web height.

[0034] Screw connections are advantageous for the various, preferably detachable, fastening methods. Cup screw connections with embossing and mutual positive-locking supports of the parts to be joined, in addition to the screw connection, are particularly beneficial.

[0035] The mounting chassis can be equipped with a lifting support arrangement during manufacturing or subsequently. This arrangement can preferably be mounted in the area of ​​a rear axle assembly or be already mounted. The lifting support arrangement can comprise lifting supports located on both sides, and preferably on the outer sides, of the longitudinal beams, particularly on the front or rear beam sections. These can, for example, be hydraulic lifting supports. They can be connected to a hydraulic supply unit. The lifting supports can be individually or jointly, particularly in pairs, equipped with a hydraulic supply unit. The lifting supports can be attached to the mounting chassis by means of a mounting bracket, which can also include a cross support. The cross support can be made in one piece or in multiple pieces, for example, from two small U-shaped profiles. It can be designed to be adjustable in length, particularly telescopic.

[0036] The mounting bracket, in particular the cross brace positioned directly between the opposing lifting supports, can stabilize the lifting supports in their position and function and can also serve the additional function of stiffening the mounting chassis. The mounting bracket, especially the cross brace, and the other stiffeners mentioned can compensate for the reduced height of the longitudinal beams and their reduced load-bearing capacity, particularly in the area of ​​the rear axle assembly.

[0037] The chassis can be designed as a ladder frame, with the top chords of the longitudinal beams and the top surface of one or more crossbeams and / or side outriggers flush with each other. This allows the chassis to have a flat, load-bearing top surface, which is particularly advantageous for supporting a superstructure floor. The chassis can be open at the bottom. It can have at least a largely unobstructed interior space between the longitudinal beams, which can be used for superstructure components, leveling jacks, a spare wheel, or similar items.

[0038] The longitudinal members of the add-on chassis can run straight and parallel to each other along the entire length of the chassis. Deviations from this are possible. The rear chassis area, for example, can be narrowed, e.g., by bringing the longitudinal members closer together or using a curved shape.

[0039] Further advantageous embodiments of the invention are specified in the dependent claims.

[0040] The invention is illustrated in the drawings in an exemplary and schematic manner. Specifically, they show Fig. 1: a road vehicle with a tractor unit, a chassis attachment and a body, Fig. 2 and Fig. 3: an attachment chassis with parts of a train head in various perspective views and different detail details, Fig. 4: A top view of the arrangement of Fig. 3, Fig. 5: a broken perspective view of an attachment point between longitudinal beams of the attachment chassis and an adapter on the train head, Fig. 6: a broken side view of an adapter and an attached longitudinal beam with a beam extension, Fig. 7 and Fig. 8: Different perspective views of a longitudinal beam, Fig. 9 and Fig. 10: a crossbeam between the support ends in different views, Fig. 11 and Fig. 12: Various fragmented views of an axle arrangement and its mounting on a carrier chassis, Fig. 13: a perspective view of an axle bracket of the axle arrangement and Fig. 14: A perspective, cutaway and sectioned view of a rear chassis area, Fig. 15 and Fig. 16: two further variants of the add-on chassis with different axle arrangements, Fig. 17, Fig. 18, Fig. 19, Fig. 20 to Fig. 21: Detailed illustrations of variants of the axle brackets and split longitudinal beams, Fig. 22: a mounting chassis with a lifting support arrangement and Fig. 23, Fig. 24 to Fig. 25: Detailed illustrations of the lifting support arrangement and its mounting hardware.

[0041] The invention relates to a mounting chassis (4) for a motorized towing head (2). The invention also relates to a vehicle (1) with a towing head (2) and a mounting chassis (4).

[0042] The in Fig. A schematically depicted vehicle (1) is designed as a motor vehicle and as a road vehicle. It has a motorized tractor unit (2) and a chassis attachment (4), which are directly or indirectly connected to each other at a mounting point (15) via an adapter (5) shown. The motorized tractor unit (2) preferably has a front-wheel drive with a drive unit (11). This unit may include a drive motor, a transmission, a driven front axle with wheels (9), an exhaust system, a fuel tank, and other components. The tractor unit (2), also referred to as the power unit, has a tractor unit frame (3). This frame is connected to the adapter (5). The tractor unit (2) may also include a cabin (10) with seats, steering mechanism, etc.

[0043] The attached chassis (4) has a rear axle arrangement (30) with a braking device (33). In the case of front-wheel drive of the tractor unit (2), the axle arrangement (30) is, for example, designed as a non-driven trailing axle arrangement. The braking device (33) can, for example, comprise disc brakes with hydraulic actuation or drum brakes with mechanical cable actuation.

[0044] A superstructure (12), which may have a box-like shape, is mounted on the chassis (4). The cabin (10) can be mounted separately or integrated into the superstructure (12). The superstructure (12) is designed, for example, as a camper van body. The superstructure (12) has a roof (13) and a floor (14), which rests on and is attached to the chassis (4).

[0045] The add-on chassis (4) has according to Fig. 1, Fig. 2, Fig. 3 to Fig. 4 as well Fig. 15, Fig. The chassis (4) is preferably composed of two parallel, profiled longitudinal beams (16). The number of longitudinal beams (16) can also be greater. In the illustrated embodiments, the mounting chassis (4) can be designed as a ladder frame (27) which, in addition to the longitudinal beams (16), has several crossbeams (28). These can be arranged between the parallel longitudinal beams (16) and rigidly connected to them. Alternatively or additionally, several side outriggers (29) can be provided, which are arranged on the outside of the longitudinal beams (16) and rigidly connected to them. The crossbeams (28) and the side outriggers (29) can be arranged together and aligned with each other. A rear crossmember (46) can be attached at the rear.

[0046] The mounting chassis (4) can be open at the bottom and have an interior space between the longitudinal members (16). The superstructure floor (14) resting on the mounting chassis (4) can form the vehicle floor. The interior space of the mounting chassis (4) can be open except for the cross members (28). Alternatively, low-profile superstructure components, e.g., water and wastewater tanks, a spare wheel, or the like, can be arranged in the interior space and accessed from below. They can be detachably attached and supported to the mounting chassis (4) or the superstructure floor (14).

[0047] The vehicle (1) may have a lifting support arrangement (54) with lifting supports, e.g., hydraulic cylinders, which can be mounted on the mounting chassis (4), in particular on the longitudinal beams (16), and optionally on the drawbar (2). A central or decentralized supply system may be located in the aforementioned interior area or elsewhere on the mounting chassis (4). The supply system may include, for example, a hydraulic supply with one or more hydraulic supply units (57), a power supply, control technology, a leveling device with one or more tilt sensors, wireless communication devices, and the like.

[0048] The add-on chassis (4) can be fully configured and delivered by the chassis manufacturer. Alternatively, it can be delivered in parts and assembled and mounted by the vehicle manufacturer. Delivering in parts saves space, storage and shipping costs, and also optimizes transport.

[0049] The vehicle (1) has a Fig. 1. The forward direction of travel (8) is indicated by an arrow. This also forms the axial direction. References to the front and rear of the vehicle (1) and the mounting chassis (4) refer to the direction of travel (8). The front is located at the front in the direction of travel (8). The directional terms "top" and "bottom" as well as "upright" refer to the intended installation position of the mounting chassis (4) and the longitudinal beams (16) on the vehicle (1).

[0050] The longitudinal beams (16) have a profiled cross-sectional shape and each consists of an upright web (18) and preferably a top chord (19). A bottom chord (20) may also be present, either additionally or alternatively. The top and bottom chords (19, 20) connect laterally to the upper and lower edges of the web (18) and may project transversely thereto. The web (18) is designed as a flat wall and may have recesses that can serve to reduce weight, optimize force and stress distribution, particularly tensile stresses from bending loads, etc., and can be designed accordingly. The longitudinal beams (16) can be made of metal, particularly steel. They can be designed as cut and bent thin-walled sheet metal components.

[0051] The longitudinal beams (16) preferably have only one web (18) and a laterally open, profiled cross-sectional shape. The open profile shape is lighter than circumferentially closed profiles with a round or prismatic cross-sectional shape.

[0052] In the embodiment shown, the longitudinal beams have a C-shape in cross-section, with the flanges (19, 20) bent laterally from the beam web ends and folded over again at least partially along the length of the beam. The beam webs (18) are located on the outside, with the flanges (19, 20) projecting towards the interior of the mounting chassis (4). In another embodiment not shown, the longitudinal beams (16) can have a different cross-section, e.g., an L-shaped one. The aforementioned upper flange (19) and lower flange (20) can also each be designed as the upper and lower edges of the longitudinal beams.

[0053] Each longitudinal beam (16) has a beam extension (17) on its front face, which is upright and extends along the longitudinal direction of the longitudinal beam (16) and projects upwards transversely to the longitudinal direction of the beam. The beam extension (17) is an integral part of the longitudinal beam (16). It represents an extension of the beam web (18) and can run in its plane. The beam extension (17) projects upwards beyond the top chord (19).

[0054] The upper chord (19) terminates at the beam attachment (17). It is shortened in length and does not extend to the front end of the longitudinal beam (16). The beam attachment (17) serves to fasten the respective longitudinal beam (16) to the tension head (2) or to the adapter and has a preferably detachable fastening arrangement (22) with fastening means (23). The effective axis of the fastening means (23) is directed transversely to the longitudinal direction of the beam and to the plane of the beam web (18).

[0055] How Fig. As illustrated in Figure 6 in a truncated side view, the upper edge (21) of the beam base (17) is positioned at a distance above the top chord (19). A height difference (h2) is formed between the upper edge (21) and the top chord (19). The upper edge (21) and the top chord (19) preferably run parallel.

[0056] The height of the support (17) of the web (18) is significantly greater than the height of the web (18) in the other, profiled longitudinal beam section. The support (17) is preferably flat and plate-shaped. It can be integrally formed with the web (18) on its front side. The support (17) extends the web (18) in a flush alignment. The bottom flange (20) can extend the length of the longitudinal beam (16) and can also be present in the area of ​​the support (17). In a variation, the support (17) can also project downwards beyond the bottom flange (20) or the lower edge of the longitudinal beam.

[0057] In the illustrated embodiment, the longitudinal beams (16) are attached to the draw head (2) and its draw head frame (3) via the intermediate adapter (5). The angled adapter (5) is, for example, Fig. 5 and Fig. Figure 6 shows that it has an upper part (6) and a lower part (7). The upper part (6) is designed as a frame connection part for the drawbar frame (3). It can be integrated into the drawbar frame (3). The lower part (7) forms a chassis connection part and is firmly connected at the connection point (15) to the front support extension (17) via the front mounting arrangement (22). The upper edges of the lower part (7) or chassis connection part and the support extension (17) are preferably located at essentially the same height. Fig. As illustrated in Figure 6, a height offset (h1) is also formed on the adapter (5) between the upper part (6) and the lower part (7).

[0058] The fastening arrangement (22) has several fastening elements (23) arranged on the support extension (17), which are, for example, designed as screw connections. The fastening elements (23) are arranged, for example, in two or more preferably parallel and longitudinally running fastening rows (25, 26) one above the other. At least one fastening element (23), in particular a fastening row (25), is arranged above the top flange (19). The upwardly projecting support extension (17) forms a mounting and fastening surface at the mounting point (15) that is larger than the height of the support web. The support extension (17) is designed for contact and connection with the adapter (5) and its chassis connection part (7). The support extension (17) has, for example, a flat plate shape. Other shapes, e.g., box-section profiles, are also possible.

[0059] How Fig. 5 and Fig. As illustrated in Figure 6, the support web (18) has a lower height than the chassis connection part (7). The support extension (17) can have the same or a greater height than the chassis connection part (7). The chassis connection part (7) can be plate-shaped or shaped in Fig. The box-shaped design shown in Figure 5 is present. The lower flange (20) of the longitudinal beam (16) can be arranged below the chassis connection part (7). The preferably plate-shaped beam extension (17) lies, for example, flush against the outside of the chassis connection part (7).

[0060] How Fig. As illustrated in Figure 1, the height offsets (h1) and (h2) can add up or accumulate. The longitudinal beams (16) with their particularly low web height and the floor (14) arranged on them can thus be lowered considerably. Due to the height offset (h2) at the longitudinal beams (16) and the lowering of the floor, the roof (13) of the structure (12) can also be lowered in the Fig. 1. lowered in the manner indicated.

[0061] At the front area of ​​the longitudinal members (16) and the mounting chassis (4) according to Fig. 2, Fig. 3 to Fig. 4 as well Fig. 9 and Fig. 10. A cross member (44) may be arranged. This is located, for example, at the rear edge of the support brackets (17) and is firmly connected to the longitudinal beams (16) at the support brackets (17), in particular by bolting. The lower parts (7) or chassis connection parts may be shortened accordingly. Alternatively, the cross member (44) may be arranged between the lower parts (7) or chassis connection parts.

[0062] At the transition point between the rear upright edge of the beam base (17) and the top flange (19), a recessed recess (43) is provided, for example, on the edge side. This recess can be provided for the cross member (44). The recess (43) can also offer advantages in terms of manufacturing, e.g., bending.

[0063] The preferably box-shaped or stepped profiled crossbeam (44) can stiffen the beam ends (17) and the connection area of ​​the longitudinal beams (16) on the adapter (5) or on the tension head frame (3). It can mutually support the preferably thin-walled beam ends (17) in the transverse direction. At this connection area of ​​the longitudinal beams (16), an additional axial longitudinal stiffener (47), e.g., plate-like, can be arranged on the beam web (18) and, if necessary, partially also on the beam end (17), either on the outside or on both the inside and outside sides. Fig. Figures 2 to 4, 9 and 10 show this arrangement. The longitudinal stiffener (47) can axially bridge the recess (43) and stabilize the transition point to the support attachment (17).

[0064] The exhaust system, for example, can be housed in the area between the frontally projecting support brackets (17) and the cross member (44). The design and arrangement of the cross member (44) are governed by [relevant regulations / guidelines]. Fig. 2 to 4, 9 and 10 different design and fastening options.

[0065] In the version of Fig. 2. The longitudinal stiffeners on both sides (47) are formed by angled, e.g., L-shaped, support brackets, which are arranged on the inside and outside of the beam ends (17) and are firmly connected to each other, to the beam ends (17), and to the crossbeam (44). In the execution of Fig. 3 and Fig. 4. An additional axial support bracket is arranged on the outside. Fig. 9 and Fig. 10 illustrate such training. At the ends of the in Fig. 10 transparent and broken-off crossbeams (44) are, for example, L-shaped flat support brackets (48) attached, in particular welded. These are each firmly connected to an external axial support bracket (48) by means of the respective projections (17) and support webs (18), in particular by screws.

[0066] The longitudinal beams (16) are according to Fig. 3, Fig. 4 as well Fig. 11 and Fig. The beam is divided axially into two or more beam sections (40, 41). These are arranged axially one behind the other. A separation point may be located at the axis arrangement (30). The beam sections (40, 41) are axially spaced apart from each other, forming a gap or space (42). Except for the beam extension (17), the beam sections (40, 41) have essentially the same cross-sectional shape and dimensions, particularly in the area of ​​the separation point. The beam extension (17) is located on the front side of the front beam section (40). Fig. 7 and Fig. Figure 8 shows the inner and outer sides of the front support section (40) in perspective view.

[0067] The rear axle arrangement (30) can have one or more axles (31). In the embodiments of Fig. For positions 1 to 15 and 17 to 21, a single axis (31) is present. Alternatively, for example, according to... Fig. 16 and Fig. 22 A tandem or triple axle is possible. The axle (31) is designed as a trailing axle and has an axle body (32) extending across the width of the chassis with pivotally mounted wheel rocker arms (32') at the ends, to which the wheels (9) are attached. The axle body (32) can have an arrow-shaped angled extension for a semi-trailing arm axle or the straight extension shown for a trailing arm axle.

[0068] The axle body (32) can be tubular and can, for example, have the cylindrical shape shown. The axle assembly (30) can include a spring and damping element. A spring element can be an axle suspension and / or an external suspension. The wheel rocker arms (32') can be connected to spring elements arranged in the axle tube (32) or to external spring elements, e.g., coil springs, air springs, or the like. Damping elements (52) in the form of shock absorbers can also be present. The installation of a level control for raising and lowering the mounting chassis (4) as needed is also possible.

[0069] Axle brackets (34) are arranged and attached at the ends of the axle body (32). These, in turn, are firmly connected to the end regions of the beam sections (40, 41) via fasteners (23) on the beam webs (18). The axle brackets (34) each bridge the separation point or gap (42) at the level of the beam sections (40, 41). The axle body (32) extends through the gap (42) between the beam sections (40, 41).

[0070] The split longitudinal beams (16), in particular the beam sections (40, 41), have a low height. This height can be lower than that of conventional add-on chassis and longitudinal beams. This height can essentially correspond to the height or diameter of the axle body (32) or be slightly greater. Fig. 2, Fig. 11, Fig. 12, Fig. 17 and Fig. Figure 22 illustrates these proportions.

[0071] How Fig. As illustrated in Figures 11 to 13 and 17 to 22, the axle body (32) can be inserted through a receiving opening (38) in the axle bracket (34) and also secured there. The receiving opening (38) can have a closed, e.g., circular, contour and be slightly offset from the lower edge of the axle bracket. For support and fastening, for example, according to Fig. 12, 17 to 19, a support extension (39) is arranged on the outside of the axle bracket (34), which is firmly connected to the axle body (32) and the axle bracket (34), e.g., by welding. The support extension (39) has, for example, a wedge-shaped housing and is arranged on the upper side of the axle body (32). The support extension (39) tapers upwards and extends to the upper edge of the axle bracket, in particular to the upper edge (36). The support extension (39) distributes the forces introduced by the axle (31) and directs them into the upper axle bracket area.

[0072] The axle blocks (34) each have according to Fig. 13 and Fig. 18 a stiffened, plate-like support profile (35) with the aforementioned receiving opening (38). The stiffening can be achieved by edge bends of the support profile (35), e.g. by the in Fig. 20 and Fig. The Z-profile shape shown in Figure 21 is formed. Furthermore, an embossing (37) can be present on the vertical wall of the support profile (35). The fastening elements (23) can be located in this area. The support extension (39), which is attached to the support profile (35), in particular by welding, also has a stiffening effect. The support profile (35) is firmly and preferably detachably connected to the ends of the support sections (4, 41), in particular by screws.

[0073] According to Fig. 12, Fig. 17, Fig. 20, Fig. 21 and Fig. 22 A stiffening insert (53) can be mounted on the inside of a beam section (40, 41) in the axle box area on the beam web (18). The stiffening insert (53) is firmly connected, in particular by screws, to the upright beam web (18) and, if applicable, to a flange (19, 20) of the beam section (40, 41) and the outer axle box (34), in particular the support profile (35). Fig. Figure 12 shows a version as a single stiffening plate. Fig. 17, Fig. 21 and Fig. Figure 22 shows a version with two straight angle brackets.

[0074] The longitudinal beams (16) or their beam sections (40, 41) lie flush with their beam webs (18) against the outer support profile (35). The bottom chords (20) can be arranged close to any lower and inwardly directed bend of the respective support profile (35).

[0075] The height of the axle brackets (34) or support profiles (35) is greater than the height of the longitudinal beams (16) or their beam sections (40, 41). The upper edge (36) of the support profiles (35) is located a certain distance above the top chords (19). This gives the axle brackets (34) a free overhang (u) above the longitudinal beams (16) or beam sections (40, 41).

[0076] The free overhang (u) can be according to Fig. 17, Fig. 18, Fig. 19, Fig. 20, Fig. 21 to Fig. 22 preferably, an axial, strip-like stiffening element (50), e.g., a sheet metal strip, is attached, in particular screwed, to the inside of each of the longitudinal members (16). Its arrangement can be spatially limited to the projection (u) above the longitudinal member (16) and, if necessary, also above the embossing (37). It can be arranged centrally in the axial direction (8) of the mounting chassis (4). In addition, a stiffening bulge can be arranged on the stiffening element (50) in the central area and opposite the support extension (39).

[0077] On the stiffening element (50) and / or on the stiffening insert (53), screw nuts (50', 53') can be attached, in particular screwed, to the inside via through holes. These allow for easy subsequent screwing on of externally mounted attachments.

[0078] The fastening means (23) at the mounting points (15) and on the axle assembly (30) can be of the same design. A detachable fastening with the fastening means (23) designed as screw connections is preferred. The drawings show a particularly robust design as a cup screw connection (24). Here, the through holes for the screw are each surrounded by an embossing on the outer wall. The embossings on the parts to be joined fit together in a form-fitting manner, supporting each other transversely to the screw direction and being clamped together by the screw connection.

[0079] The axle brackets (34) can have prepared mounting points for damping elements (52) and / or spring elements. These can be installed or replaced later as needed. The mounting points can be designed and arranged, for example, as the openings shown, possibly with the nuts (50', 53'), or as protruding bolts on the support profile (35). Bolts and nuts (50') are advantageous when a wheel housing is arranged in close proximity to the axle bracket (34) in the assembly (12).

[0080] Fig. 17, Fig. 18 to Fig. Figure 19 shows, in perspective and side views, an exemplary mounting point with a mounting bracket (51) for a damping element (52) or shock absorber. The mounting bracket (51) is designed, for example, as a mounting plate abutting the vertical wall of the support profile (35) with stiffening, angled edge flanges and a projecting support bolt for the eye of the damping element (52). The mounting bracket (51) extends vertically over most of the support profile (35) into the overhang (u) and may also have a deformation adapted to the embossing (37). The mounting plate, which is V-shaped in the side view, for example, is firmly connected, in particular screwed, to the stiffened support profile (35), the vertical support web (18), and the stiffening element (50), especially also with nuts (50').

[0081] A lifting support arrangement (54) can be arranged on the mounting chassis (4), preferably in the area of ​​the axle arrangement (30). Fig. 22, Fig. 23, Fig. 24 to Fig. Figure 25 shows this as an example on a mounting chassis (4) with a tandem axle. The lifting support arrangement (54) shown can also be used on a mounting chassis (4) with a different axle arrangement (30), in particular with a single axle (31), a triple axle or the like. The lifting support arrangement (54) can be mounted on the mounting chassis (4) on site or can be retrofitted or converted on an existing mounting chassis (4).

[0082] The lifting support assembly (54) is, for example, located in the rear area of ​​the mounting chassis (4) behind the axle assembly (30). Alternatively, another location is possible. A preferred location is in the area in front of and / or behind the axle assembly (30) and at a small distance from it. An arrangement in the area of ​​a stiffening insert (53) is advantageous.

[0083] The lifting support arrangement comprises lifting supports (55, 56) on both sides and a mounting bracket (58) for attaching the lifting supports (55, 56) to the longitudinal beams (16), in particular to the front and / or rear beam sections (40, 41). The mounting bracket (58) can also be securely connected, in particular by screwing, to an internal stiffening insert (53) on the respective longitudinal beam (16) or beam section (40, 41). The nuts (53') are also advantageous.

[0084] In the illustrated embodiment, the lifting supports (55, 56) are designed as hydraulic lifting supports. These can comprise a cylinder, preferably mounted upright and stationary on the mounting chassis (4), with an extendable piston rod and a support foot or support plate at the free end of the piston rod. In another embodiment, not shown, the lifting supports (55, 56) can be designed differently, e.g., as mechanical lifting supports with a spindle drive, rack and pinion drive, or the like. The lifting supports (55, 56) can also be pivotably mounted on the mounting chassis (4) via the mounting bracket (58).

[0085] In a hydraulic leveling system, one or more hydraulic supply units (57) may be provided. In the embodiment shown, decentralized leveling supports (55, 56) each have their own hydraulic supply unit (57). In another embodiment, the leveling supports (55, 56) on both sides or in pairs may have a common hydraulic supply unit (57). The one or more hydraulic supply units (57) each comprise a pump assembly, a hydraulic reservoir, and controllable valves, e.g., proportional valves.

[0086] The lifting supports (55, 56) can be connected individually or together with the relevant hydraulic supply unit(s) (57) in a hydraulic circuit via lines. The cylinders can have line connections in their upper and lower regions, leading to the respective cylinder chambers above and below the piston. The lifting support arrangement (54) can further comprise a control unit (not shown) which may be equipped with a power supply for the one or more hydraulic supply units (57), in particular with a power output stage, and optionally with a leveling device.

[0087] The mounting fitting (58) comprises a support bracket (60) for each of the opposing support legs (55, 56), which can be attached externally to the respective longitudinal beam (16) or beam section (40, 41), in particular to its upright web (18), e.g. by screws. The mounting fitting (58) further comprises a cross support (59) which can be connected to the support brackets (60) on both sides. In addition, the mounting fitting (58) can include a support console (62) for a hydraulic supply unit (57).

[0088] The support bracket (60) has a mounting plate for attachment and fastening, in particular by screw fastening, to the relevant longitudinal beam (16) or beam section (40, 41). The upright beam web (18) can be clamped and stabilized between the mounting plate and a stiffening insert (53).

[0089] The mounting plate has a clip, clamp, or other adapted fastening element on its outer surface for the respective lifting support (55, 56). The lifting support bracket (60) has support arms (61) projecting downwards from the edge of the mounting plate and angled towards the chassis interior below the relevant longitudinal member (16). The support arms (61) can be integrally formed with the mounting plate. They can, for example, be formed by angled edge flanges on the vertical edges of the mounting plate. The cross support (59) is attached to the horizontal arm sections of the support arms (61), in particular by screws. The cross support (59) can have a profiled cross-section, for example, as a horizontal U- or C-profile. The horizontal arm sections of the support arms (61) rest against the outer sides of the cross support (59). The cross support (59) shown is formed in one piece, although a multi-part design, in particular one with variable length, is also possible.

[0090] The cross support (59) is arranged directly between the opposing lifting supports (55, 56). The cross support (59) stabilizes the lifting supports (55, 56) and stiffens the mounting chassis in the transverse direction.

[0091] In the decentralized supply units (57) shown, a support bracket (62) is attached to the outside of each longitudinal beam (16), in particular by screwing it on. A common supply unit (57) can also be arranged and attached elsewhere, e.g. on or to the transverse support (59).

[0092] The lifting support arrangement (54) can be supplemented by further lifting supports not shown. These can be mounted, for example, in the area of ​​the drawbar (2), in particular on the drawbar frame (3). These additional lifting supports, also arranged in pairs and on both sides, can each have their own or a common hydraulic supply unit (57). In a further embodiment, a common hydraulic supply unit with corresponding pipe connections can be provided for all existing hydraulic lifting supports. In a different, and in particular mechanical, embodiment of the lifting supports, the one or more supply units (57) can be omitted.

[0093] The mounting chassis (4) with the longitudinal beams (16) and optionally the crossbeams (28) and / or the side outriggers (29) has a preferably flat surface for the flat support of the floor (14). The upper chords (19) of the longitudinal beams (16) and the upper surfaces of the crossbeams (28) and / or side outriggers (29) are arranged at the same height. Fig. Figure 14 illustrates this interpretation. The crossbeams (28) can have a notch (45) on their upper surface at the ends and at the end-face attachment points to the support webs (18). The mounting chassis (4) can have another cross member (46) at the rear, which is also flush with the upper chords (19) in height.

[0094] The front and / or rear frame components of the add-on chassis (4) or ladder frame (27) can be pre-assembled and delivered by the chassis manufacturer to a vehicle manufacturer. They can then be assembled and mounted there using a few screw connections. One of the frame components or its support sections (40, 41) can optionally be pre-bolted to the axle support (34). This is possible, for example, with a single screw connection, which allows the axle support to be folded in and out, thus improving ergonomics for the customer.

[0095] Variations of the illustrated examples are possible in various ways.

[0096] The adapter (5) can be omitted or designed without a height offset (h1). The longitudinal beams (16) and their beam sections (40, 41) can have a different profiled cross-sectional shape. The axle arrangement (30) can include half axles or stub axles with a wheel rocker arm (32') and axle bracket (34) arranged individually and on one side of a shortened axle body (32). The vehicle (1) can have rear-wheel drive and a different driven axle arrangement (30).

[0097] The features of the illustrated embodiments and the mentioned modifications can be combined and, if necessary, exchanged in any suitable manner within the scope of the claims. REFERENCE MARK LIST 1 vehicle, road vehicle 2 train heads, power heads 3 Drawbar frames 4 add-on chassis 5 adapters 6. Top part, frame connection part 7 Lower part, chassis connection part 8 Direction of travel 9 vehicle wheel 10 cabins 11 Drive block 12 Structure 13 Roof 14 Floor 15 cultivation site 16 longitudinal beams 17 Carrier approach 18 support bridge 19 Upper chord 20 Lower belt 21 Top edge 22 Mounting arrangement 23 Fasteners 24 cup screw 25 fastening row 26 fastening row 27 Guidelines 28 crossbeams 29 side booms 30 axle arrangement 31 axle, steering axle 32 axle bodies 32' Wheel rocker arm 33 Braking system 34 axle bracket 35 Support profile 36 Top edge 37 embossing 38 Intake opening 39 Support approach 40 Carrier section 41 Carrier section 42 free space, gap 43 Exclusion 44 Crossbeam 45 Disconnection 46 Rear crossmember 47 Longitudinal stiffening 48 support brackets 49 Support bracket 50 stiffening element 50' screw nut 51 Mounting fitting 52 damping agents 53 Stiffening insert 53' Screw nut 54 Lifting support arrangement 55 Lifting support 56 Lifting support 57 supply unit 58 Mounting fitting 59 Cross support 60 jack stand holders 61 Support arm 62 Support console h1 Height offset adapter h2 Height offset longitudinal beam u overhang

Claims

[1] Mounting chassis for connection with a motorized towing head (2) at a mounting point (15), wherein the mounting chassis (4) comprises several parallel, profiled longitudinal beams (16) and a rear axle assembly (30), wherein the longitudinal beams (16) each have an upright support web (18) and a front mounting arrangement (22) for connection with the towing head (2) at the mounting point (15), and wherein the axle assembly (30) comprises one or more axles (31) each with an axle body (32) and one or more axle brackets (34) connected thereto for attachment to the longitudinal beams (16), characterized by, that the longitudinal beams (16) are each divided lengthwise into two or more beam sections (40,41) at the axle arrangement (30), wherein the beam sections (40,41) are each axially spaced apart from each other at their ends forming a gap (42) and the axle body (32) is arranged in the gap (42) between the beam sections (40,41) and wherein the beam sections (40,41) can be attached or are attached to the axle brackets (34). [2] Mounting chassis according to claim 1, characterized by , that the mounting chassis (4) comprises two longitudinal beams (16) and / or that the longitudinal beams (16) are metallic longitudinal beams (16). [3] Mounting chassis according to claim 1 or 2, characterized by , that the axle arrangement (30) is designed as a non-driven trailing axle arrangement. [4] Mounting chassis according to claim 1, 2 or 3, characterized by, that the one or more axles (31) are designed as steering axles and each have one or two wheel rocker arms (32') which are pivotably mounted on the axle body (32), in particular on an axle tube. [5] Mounting chassis according to any of the preceding claims, characterized by that the height of the support sections (40,41) corresponds to the height or outer diameter of the axle body (32) or is slightly greater. [6] Mounting chassis according to any one of the preceding claims, characterized by , that the axle blocks (34) have a greater height than the longitudinal beams (16) and project upwards over the upper edge of the upright beam web (18) with an overhang (u). [7] Mounting chassis according to one of the preceding claims, characterized bythat the axle blocks (34) each have a stiffened plate-like support profile (35) with a preferably circumferentially closed receiving opening (38) and a raised support projection (39) therein for the axle body (32). [8] Mounting chassis according to claim 6 or 6 and 7 characterized by , that a stiffening element (50) is arranged on the overhang (u) of the axle brackets (34) and / or a stiffening insert (53) is arranged on the inside of the front and / or rear support sections (40,41), which is firmly connected to the respective axle bracket (34) and the respective support section (40,41), in particular by screws. [9] Mounting chassis according to claim 8, characterized by , that one or more screw nuts (50',53') are attached, in particular welded, to the inside of the stiffening element (50) and / or the stiffening insert (53) over a through opening. [10] Mounting chassis according to any of the preceding claims, characterized by, that a lifting support arrangement (54) with lifting supports (55, 56) on both sides can be mounted or is mounted on the longitudinal beams (16) in the area of ​​the rear axle arrangement (30) by means of a mounting fitting (58), wherein the mounting fitting (58) has lifting support holders (60) for mounting on the respective longitudinal beam (16) and a connecting transverse support (59). [11] Mounting chassis according to claim 10, characterized by , that the lifting supports (55,56) are arranged opposite each other and can be connected or are connected by the cross support (59). [12] Mounting chassis according to claims 10 and 11, characterized by , that the lifting support holders (60) are each firmly connectable or connected to the upright support web (18) of a longitudinal beam (16), in particular a beam section (40,41), and to a stiffening insert (53), in particular screwable or bolted. [13] Mounting chassis according to claim 10, 11 or 12, characterized by, that the lifting support arrangement (54) comprises hydraulic lifting supports (55, 56) which are connected to a common hydraulic supply unit (57) or to each have its own hydraulic supply unit (57). [14] Mounting chassis according to any of the preceding claims, characterized by that the longitudinal beams (15) are designed as thin-walled sheet metal components and each have a single or multiple angled cross-section, in particular an L- or C-shaped cross-section, with the beam web (18) and a bent upper chord (19) and / or lower chord (20). [15] Mounting chassis according to any of the preceding claims, characterized by that the longitudinal members (16) are each designed on the front side to be firmly connected to a drawbar frame (3) directly or indirectly via an adapter (5), preferably by lowering the mounting chassis (4) and forming a height offset. [16] Mounting chassis according to claim 15, characterized by , that the upright support web (18) of the longitudinal beams (16) has a lower height than a chassis connection part (7) of the adapter (5) or a lower height than a frame part of the drawbar frame (3) intended for chassis connection. [17] Mounting chassis according to claim 15 or 16, characterized by , that the longitudinal beams (16) each have a beam extension (17) extending in the longitudinal direction of the beam and projecting transversely to the longitudinal direction of the beam and upwards, the upper edge (21) of which is arranged at a distance forming a height offset (h2) above the upper edge of the beam web (18) or a top chord (19), wherein the fastening arrangement (22) is arranged on the beam extension (17). [18] Mounting chassis according to claim 17, characterized by , that the support attachment (17) is formed in a plate-like shape and is molded or attached to the support web (18). [19] Mounting chassis according to claim 17 or 18, characterized by , that a crossbeam (44) is arranged between the support ends (17) of the parallel longitudinal beams (16). [20] Mounting chassis according to claim 17, 18 or 19, characterized by , that the upper chord (19) ends in front of or at the support attachment (17). [21] Mounting chassis according to one of claims 17 to 20, characterized by , that the fastening arrangement (22) has several fastening means (23) arranged at the support end (17), wherein at least one fastening means (23), in particular a row of fastenings (25), is arranged above the top chord (19). [22] Mounting chassis according to one of claims 15 to 21, characterized by , that the adapter (5) has a height offset (h1) between a frame connection part (6) on the pull-head side and a chassis connection part (7). [23] Mounting chassis according to claim 22, characterized by, that a height offset (h2) is formed between the upper edge (21) of the support attachment (17) and the upper chord (19), wherein the mounting chassis (4) is arranged lower than a drawbar frame (3) by a cumulative height offset (h1,h2). [24] Mounting chassis according to any of the preceding claims, characterized by , that damping means (52) and, if necessary, spring means are arranged on each of the axle blocks (34). [25] Mounting chassis according to one of claims 21 to 24 characterized by that the fastening means (23) are designed as screw connections, in particular as positive locking cup screw connections (24). [26] Mounting chassis according to one of the preceding claims, characterized by , that the mounting chassis (4) is designed as a ladder frame (27) and has several cross members (28) connected to the longitudinal members (16) and optionally side extensions (29). [27] Road vehicle, with a motorized towing head (2) and with an attached chassis (4) connected to each other at an attachment point (15), characterized by , that the mounting chassis (4) is designed according to at least one of claims 1 to 26. [28] Road vehicle according to claim 27, characterized by , that the train head (2) is front-wheel drive. [29] Road vehicle according to claim 27, characterized by , that the road vehicle (1) includes an adapter (5) for connecting the towing head (2) and the attached chassis (4). [30] Road vehicle according to claim 27, 28 or 29, characterized by , that the road vehicle (1) has a superstructure (12) arranged on the mounting chassis (4) with a floor (14) which rests on and is supported on the mounting chassis (4) and the longitudinal beams (16). [31] Road vehicle according to claim 27 or 30, characterized by , that the structure (12) is lowered by a cumulative height offset (h1,h2).

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