Abstract: An embodiment vehicle intermediate structure includes a first intermediate crossmember connecting a pair of side sills in a width direction of a vehicle, wherein each end face of the first intermediate crossmember is attached to an inboard side surface of the corresponding side sill, and wherein a cross section of the first intermediate crossmember is uniform in a longitudinal direction thereof.

Abstract: A vehicle body having a high voltage battery may include a load path formed by a reinforcing frame provided between a vehicle body frame and a battery frame and the battery frame may be installed on the vehicle body frame via the reinforcing frame, improving the robustness and collision rigidity of the battery frame.

Abstract: A modular vehicle is generally presented where the modular vehicle is generally configured to be rearranged into different driving, passenger, and storage configurations using a plurality of different modules that interface with a powered chassis. The vehicle may include a plurality of modules arranged on the powered chassis. The modules may vary in size and shape and may be configured to interface with the chassis. The powered chassis is designed to include all power and drivetrain components as well as the wheel connections and wheels, all within a generally flat platform that is intended to support the vehicle modules.

Abstract: The present teachings generally relate to a structural reinforcement, a body member comprising the structural reinforcement, and a method of using the structural reinforcement. The structural reinforcement comprises a first wall, a second wall extending from a first side of the first wall. Spacer legs extend from a second side of the first wall and define a first channel Spacer legs extend from a second side of the second wall and define a second channel. The structural reinforcement is configured to reinforce a joint.

Abstract: A rocker component for a vehicle having a reinforcement beam including a metal sheet that is shaped with a plurality of elongated bends extending in parallel along a length of the reinforcement beam that together form a cross-sectional shape extending continuously along the length of the reinforcement beam. The cross-sectional shape of the reinforcement beam includes a beam portion and a flange portion integrally extending from the beam portion and includes an edge of the metal sheet. The rocker component also includes a sill panel having flanges extending longitudinally along upper and lower edges of the sill panel relative to the vehicle, the flange portion of the reinforcement beam joined to one of the flanges of the sill panel to secure the reinforcement beam to the sill panel in replacement of a separate second sill panel.

Abstract: A vehicle for delivering packages, comprising a tractor comprising a motor, a pair of front wheels, a rear wheel, and a rail between the pair of front wheels and the rear wheel, and a removable container comprising a space for storing packages where a bottom of the container is configured to fit over and mount to the rail.

Abstract: A rocker component for a vehicle includes a reinforcement beam having a metal sheet that is shaped with a plurality of elongated bends extending in parallel along a length of the reinforcement beam that together form a cross-sectional shape extending continuously along the length of the reinforcement beam. The cross-sectional shape of reinforcement beam includes a beam portion and a flange portion integrally extending from the beam portion. The beam portion has a multi-hollow shape that encloses a plurality of hollow cavities that extend longitudinally between openings at opposing ends of the reinforcement beam. The flange portion integrally extends from the beam portion and includes an edge of the metal sheet. The flange portion is configured to attach to the vehicle for supporting the rocker component along an outboard side region of the vehicle.

Abstract: An embodiment vehicle front structure includes a pair of front side members, a pair of fender upper members located above the pair of front side members, respectively, a bumper back beam connecting front ends of the pair of front side members, and a front end module connected to the pair of front side members and the pair of fender upper members.

Abstract: A composite structural body (A) includes a first metal member (M1) having a plate-like shape, a second metal member (M2) having a plate-like shape, and a resin member (R) that integrates the first metal member (M1) and the second metal member (M2) with each other. The resin member (R) includes a first resin layer (R1) that coats astride one main surface of the first metal member (M1) and one main surface of the second metal member (M2), and a second resin layer (R2) that coats astride another main surface of the first metal member (M1) and another main surface of the second metal member (M2). The composite structural body (A) is provided as a composite structural body that has satisfactory moldability, that is capable of securing sufficient strength, and that is suitable as a component of a structure such as a vehicle body.

Abstract: An underframe structure for a motor vehicle, the underframe structure comprising a floor (12), and at least two longitudinal side members (14) respectively disposed on each side of the floor (12); the floor (12) is divided into at least one front unit (16) and one rear unit (18) fixed to a transverse heel board (24). The underframe structure also comprises a lateral reinforcement part (26) which comprises at least one elongate body extending from the heel board towards the closest side member, the lateral reinforcement part is fixed on one side to the heel board (24), and on the other side to the front unit (16) of the floor (12) or to a side member (14) in the region of the front unit (16) of the floor.

Abstract: A rear vehicle body structure includes two opposite rear side members to which wheelhouse panels are respectively coupled and spring seats positioned respectively at lower sides of the two opposite rear side members.

Abstract: A dashboard carrier for a motor vehicle with a first hollow carrier profile and a second hollow carrier profile. The two carrier profiles are aligned in the longitudinal extension of the dashboard carrier, arranged at a distance from one another, and connected to one another by a carrier connector spanning the distance between the two carrier profiles. The carrier connector connects the two carrier profiles to one another eccentrically and asymmetrically in relation to the longitudinal axis of the carrier profiles. The carrier connector has an attachment portion on each end side thereof and a carrier portion which connects the attachment portions. The carrier connector is connected, with its attachment portions, to a respective circumferential portion of the lateral surface of the two carrier profiles.

Abstract: A frame structure of a commercial vehicle having an independent suspension system may include: a front outrigger mounted at lower front ends of wheel housings along a wide direction of a vehicle; a rear outrigger mounted at lower rear ends of the wheel housings along the width direction, wherein the wheel housings are arranged between the front and rear outriggers in a vehicle body length direction; a center reinforce unit mounted on an inner lower side of the wheel housing and disposed between the wheel housings, the center reinforce unit configured to connect the front and rear outriggers along the vehicle body length direction; a side reinforce unit mounted on an inner side of the wheel housing and connected to the center reinforce unit; and a lower reinforce unit configured to be connected to the center reinforce unit and coupled to the first suspension mounting assembly through the rear outrigger.

Abstract: A structural support system for a vehicle having a longitudinal axis extending from a front of the vehicle to a rear of the vehicle includes a cradle configured to support an engine of the vehicle, a structural side rail assembly having first and second side rails, a first set of six cradle attachments coupling the cradle to the first side rail, and a second set of six cradle attachments coupling the cradle to the second side rail. A predetermined portion of the cradle attachments of both the first and second set of six cradle attachments are designed to intentionally detach during a frontal impact event to facilitate absorbing impact energy and reducing deceleration and passenger compartment intrusion.

Abstract: An embodiment vehicle body includes a plurality of shock absorber housings configured to cover and support upper ends of respective shock absorbers connected to the wheels of a vehicle, a plurality of upper truss members, each of which is connected at one end thereof to a front shock absorber housing and extends upwards while being bent and is connected at a remaining end thereof to a rear shock absorber housing so as to constitute a corresponding one of two lateral pillars of the vehicle; and a roof member, which extends in a width direction of the vehicle and is connected at two ends thereof to upper portions of the plurality of upper truss members.

Abstract: An embodiment front vehicle body structure includes an underbody, an upper body coupled to the underbody, a front cowl disposed in front of the upper body, and a cowl support unit connected to the front cowl through a front pillar and a front side member of the upper body. An embodiment cowl support unit includes a cowl lower cross member connected to a front of the front side member along a vehicle width direction, a cowl lower support connected to the cowl lower cross member and the front cowl, and a cowl upper side support connecting an upper portion of the front pillar and the front cowl.

Abstract: A cowl cross bar assembly of reduced weight and increased stiffness. The cowl cross bar assembly includes a first pipe and a second pipe which are hollow and disposed laterally inside a chassis, pipe caps coupled to one end of the first pipe and the second pipe, and pipe stiffeners accommodated in the first pipe and the second pipe and configured to absorb collision energy generated in a collision of a vehicle.

Abstract: A vehicle body includes a plurality of shock absorber housings each covering and supporting a respective shock absorber that is configured to be connected to a respective wheel of a vehicle, a pillar member having a first end connected to one of the shock absorber housings to form a corner, wherein the pillar member connects two of the plurality of shock absorber housings to form a portion of a cabin of the vehicle, wherein the two of the plurality of shock absorber housings are disposed at a side of the vehicle at a front portion and a rear portion of the vehicle, and a supporting member disposed at the corner of the shock absorber housing, an upper end of the supporting member being coupled to the pillar member and a lower end of the supporting member being coupled to the shock absorber housing.

Abstract: A vehicle lower part structure includes: center rail portions disposed at a central part in a front-rear direction of the vehicle; front rail portions disposed forward of the center rail portions in the front-rear direction of the vehicle; rear rail portions disposed rearward of the center rail portions in the front-rear direction of the vehicle; front connecting rail portions connecting the center rail portions and the front rail portions in the front-rear direction of the vehicle; rear connecting rail portions connecting the center rail portions and the rear rail portions in the front-rear direction of the vehicle; first mount portions supporting a vehicle body constituting a cabin; and second mount portions supporting the vehicle body.

Abstract: Energy absorption at the time of load input is improved with high mass efficiency. A hollow member includes: a hollow metal member having a bending induction portion in a portion thereof in a longitudinal direction; and a resin material which is disposed in close contact with the metal member on both sides of the bending induction portion in the longitudinal direction, and is disposed in at least a part of a range of less than ? of a cross-sectional height of the metal member from an end portion of the bending induction portion toward an outside in the longitudinal, in which an amount of the resin material per length in the longitudinal direction is larger on the outside of the bending induction portion than on an inside of the bending induction portion.

Abstract: A vehicle body joint structure includes: a frame member made of a metal pipe, extending from a side of a vehicle body to be inclined vertically, and configured to form a front pillar; and a body member made of a plastic composite material, including a dash connection part and a cowl connection part, joined to the frame member, and configured to cover the frame member.

Abstract: A rocker assembly for a vehicle body structure includes a rocker rail having a boxed cross-section defining a rocker rail interior space, a rocker rail length, and a rocker rail outer surface along the length. The rocker rail defines at least one aperture connecting the interior space and the panel outer surface. The rocker assembly also includes an insert member configured to fit within the rocker rail interior space and extend along the panel length to reinforce the panel. The insert member includes at least one projection configured to match up with and extend at least partially through a respective at least one aperture. The projection(s) are configured to reinforce the rocker rail by opposing deformation of the boxed cross-section. The projection(s) oppose deformation via interference with the boxed cross-section at the respective aperture(s) when the rocker rail is subjected to an applied load perpendicular to the panel outer surface.

Abstract: A rear vehicle-body structure for increasing support rigidity for a rear suspension and consequently increase steering stability. The rear vehicle-body structure includes a first frame extending to connect a rear end lower portion of a combined body composed of a side sill and a pillar and a lower arm front support portion of a rear side housing, and having therein a closed cross-sectional space; a second frame extending to connect a rear end lower portion of a floor tunnel located at a vehicle-width-direction center portion of a vehicle-body bottom portion and bulging toward a vehicle upper side in a vehicle front-rear direction and the lower arm front support portion and having therein a closed cross-sectional space; and a third frame extending to connect a rear end upper portion of the floor tunnel and the lower arm front support portion, and having therein a closed cross-sectional space.

Abstract: A vehicle body joint structure includes a roof side member extending in a front-rear direction from a side of an upper portion of a vehicle body, a pillar member extending in an up-down direction and matched to a front end or a rear end of the roof side member, a roof rail member laterally extending from the upper portion of the vehicle body and matched with the front end or the rear end of the roof side member, and a connector disposed at the front end or the rear end of the roof side member and fixing the roof side member, the pillar member, and the roof rail member.

Abstract: A vehicle body structure includes a space frame, a roof side bracket fastened to a roof side part of the space frame, a roof matching part provided on an upper side of the roof side bracket, and a roof panel, wherein a lower side of the roof panel is supported by the roof matching part.

Abstract: The amount of absorbed energy at the time of load input is improved with high mass efficiency. A hollow member includes: a hollow metal member having a bending induction portion in a portion in a longitudinal direction; and a resin material which is made of a resin having a Young's modulus of 20 MPa or more and is disposed in the bending induction portion in close contact with the metal member.

Abstract: A roof carrier for a vehicle is provided. The roof carrier includes roof side tubes extendedly provided on opposite sides of a vehicle body along a front-rear direction of the vehicle from opposite sides of a cowl in a front side of the vehicle to opposite sides of a rear roof rail in a rear side of the vehicle while providing a closed cross section. The roof carrier further includes at least one middle roof rail extendedly provided along a transverse direction of the vehicle to connect the roof side tubes on opposite sides between the cowl and the rear roof rail while providing a closed cross section.

Abstract: A vehicle body of a vehicle includes pillar members forming a frame at opposite sides of an upper portion of the vehicle body, respectively, side reinforcing members connected to intermediate connecting points of the pillar members, wherein the side reinforcing members form a frame at opposite sides of a lower portion of the vehicle body, respectively, and load absorption members, to which suspension mounting sections are fixed, respectively, a first end of each of the load absorption members being connected to an end of a corresponding one of the pillar members and a second end of each of the load absorption members being connected to an intermediate connecting point of a corresponding one of the side reinforcing members, wherein a triangular truss support structure is formed through connection of each load absorption member with the corresponding pillar member and the corresponding side reinforcing member.

Abstract: A front upper frame connection casting can comprise a vertical front upper frame connection boss oriented in a first downward direction and configured to weldably attach to a first elongate support member; a rearward angular front upper frame connection boss oriented in a second downward direction and configured to weldably attach to a second elongate support member different from the first elongate support member; and a center cast section castably attached to the vertical front upper frame connection boss and the rearward angular front upper frame connection boss. The center cast section can have a top surface configured to weldably attach to a front upper body support and frame connection fabrication of a space frame of a rear haul truck.

Abstract: In a vehicle frame structure, upper ends of a front frame and a rear frame, which connect a lower frame and an upper frame vertically, are connected to each other above the upper frame, and a front portion frame assembly is connected to a main frame assembly via the lower frame and the upper ends of the front and rear frames. A bumper includes a front-rear frame portion extending forward from the front frame, and an inclined frame portion arranged between an intermediate portion of the front frame and an end portion of the front-rear frame portion. The bumper includes a sub-bumper, the sub-bumper including a front sub-frame extending upward from a front end of the bumper, and a front-rear sub-frame connected between an end portion of the front sub-frame and an intermediate portion of the front frame above the upper frame.

Abstract: A vehicle body structure is provided, which includes rear wheel houses covering left and right rear wheels, left and right rear damper supports supporting upper ends of rear suspension dampers provided to the rear wheel houses, left and right rear side panels, a floor cross member coupling the rear wheel houses in a vehicle width direction, forward and downward of the rear damper supports, a rear header, left and right lower reinforcements coupled at lower ends thereof to the floor cross member and at upper ends to a region adjacent the rear damper supports, and left and right upper reinforcements coupled at lower ends thereof to upper ends of the lower reinforcements and at upper ends to the rear header. A substantially annular shape is formed in a front view by the floor cross member, the rear header, and the left and right lower upper reinforcements.

Abstract: A structural reinforcement comprising a base reinforcing structure including a plurality of ribs and having a first surface and a second surface, an expandable adhesive material located onto a first portion of the first surface, and a sealant material located around an edge of the second surface, the second surface being substantially free of any of the plurality of ribs.

Abstract: A bumper beam 100 includes a closing plate 2 and a hat member 1. The hat member 1 includes a top plate 1a, two flanges 1c, and two walls 1b. The hat member 1 includes a high-strength portion 10H and low-strength portions 10L. The high-strength portion 10H includes a longitudinally middle portion of each of the two walls 1a and extends a length of at least 250 mm. The high-strength portion 10H has a tensile strength not lower than 1.5 GPa. The low-strength portions 10L are located outward of the high-strength portion and extends a length not smaller than the height of the walls. The low-strength portions have a tensile strength lower than the tensile strength of the longitudinally middle portion of the two walls.

Abstract: A chassis (200) embodiment having a geometrical structure surrounding the side and upper parts a vehicle (100), and with this geometrical structure, providing high damping effect in case of an accident, and it is characterized in comprising; a lower chassis extension (210) having front arms (211) configured at the upper part of said vehicle (100) and an upper dampener chassis (220) configured on said lower chassis extension (210).

Abstract: A vehicle body front structure includes paired left and right front side frames extending in a vehicle front-rear direction and a crossmember that extends in a vehicle width direction and is suspended between the paired left and right front side frames. The front side frames respectively have side frame bend portions at rear portions thereof, the side frame bend portions bending inward in the vehicle width direction, and at least one of end portions of the crossmember in the vehicle width direction is connected to a corresponding one of the side frame bend portions.

Abstract: A vehicle body structure of a vehicle includes a joint (20) formed by joining body parts such that the body parts overlap each other. The joint (20) includes a plurality of spot joints (21) and an adhesive joint (22). An adhesive has a storage modulus in the range of 100 MPa to 800 MPa and a loss factor of 0.2 or more at a temperature of 20° C. and an exciting force frequency of 60 Hz.

Abstract: A vehicle engine compartment assembly includes an upper longitudinal beam and a front subframe disposed under the upper longitudinal beam. The vehicle engine compartment assembly further includes a middle longitudinal beam and a connecting supporting member. The middle longitudinal beam is disposed between the upper longitudinal beam and the front subframe. The connecting supporting member is connected to each of the middle longitudinal beam, the upper longitudinal beam and the front subframe. In the vehicle engine compartment assembly, the middle longitudinal beam is added between the upper longitudinal beam and the front subframe, and the upper longitudinal beam, the middle longitudinal beam and the front subframe are connected together to form a stable structure having a shape of “”. When the vehicle suffers collision at a high speed, the impact force is transferred through three load transfer paths to improve the energy absorption effect.

Abstract: A rear deck post assembly is provided for reinforcing a cargo bed of a utility vehicle. The assembly includes a first deck mount coupled to a vehicle frame, and a first rear deck post coupled to the first deck mount. A second deck mount is provided coupled to the vehicle frame and spaced apart from the first deck mount. A second rear deck post is coupled to the second deck mount. A deck sill component is provided longitudinally extending between the first deck post and the second deck post. Deck bolts may be used to couple the deck sill component, deck mounts, and deck posts to the vehicle frame. The first and second deck mounts and deck posts may be a cast aluminum alloy, a cast magnesium alloy, or a fiber reinforced composite material.

Abstract: An apparatus and a method for designing a reinforcement structure. The reinforcement structure includes a deck sill with a connecting end, having substantially uniform area moment of inertia throughout a length of the deck sill. Also, the reinforcement structure includes a rear post with a connecting end and a free end, having a varying area moment of inertia, and where the rear post is attached to the deck sill in a substantially perpendicular manner by attaching the connecting end of the deck sill to the connecting end of the rear post forming the reinforcement structure that limits deflection of the free end of the rear post to a target value upon application of a cantilever force at the free end of the rear post.

Abstract: An All-Terrain Vehicle with a frame comprising an arcuate shape or an elevated portion with an apex. In one embodiment, the arcuate shape or elevated portion with an apex is located between a rear axis and a front axis such that there is additional clearance over a typical non arcuate frame or a flat frame for a given ride height. The arcuate shape may be a lateral arcuate shape. The frame may also provide for additional structural strength. The frame may also include the ability to attach periphery accessories such as an engine cage, a passenger cage, trailing arms, power train and transmission.

Abstract: A vehicle body front section structure has a floor tunnel that projects into a vehicle interior on an underfloor of a vehicle, that is formed in a vehicle longitudinal direction, and that has a floor tunnel front end part disposed at a vehicle front of the floor tunnel, and floor tunnel members, a front end ridge line part, a first vehicle body front section reinforcing member that covers, from an outside of the vehicle, a whole of the floor tunnel front end part, from a vehicle upper end to a root of each of the floor tunnel members, and that is provided in the vehicle longitudinal direction along the front end ridge line part, and front side members, each of which has a lower end root that is connected to a dash panel, and each of which extends forward from the lower end root.

Abstract: A structure for coupling roof rails using a side two-buck structure includes a floor formed of a bottom of a vehicle body, side inner panels coupled to both side surfaces of the floor, and roof rails coupled to upper portions of the side inner panels. A method for coupling roof rails includes coupling side inner arms to side surfaces of a vehicle floor, coupling a cross shaped joint part to an upper portion of the side inner arm, coupling a side inner reinforcement part to outer surfaces of the side inner arm and the joint part, coupling the roof rail to an upper portion of the side inner reinforcement part and an upper surface of the joint part, coupling a side outer reinforcement panel to an outer portion of the side inner reinforcement part, and coupling a side outer panel to an outer portion of the side outer reinforcement panel.

Abstract: A vehicle front end structure includes a longitudinally extending upper tube, and a longitudinally extending lower tube. The upper and lower tubes are conjoined to each other along a substantial portion of the total length of the tubes. The front end structure also includes a coupling bracket that is secured to an outer wall of each of the upper and lower tubes near a rear edge of the tubes. The coupling bracket also includes an extension tab cantilevered from the rear edge of the tubes. Additionally, the front end structure includes a hinge pillar defining a first vertical mounting surface secured to an inner wall of the upper and lower tubes. The hinge pillar also defines a second vertical mounting surface secured to the extension tab of the coupling bracket.

Abstract: A hollow columnar shock absorbing member (1) has an axis (O), a plurality of rectangular walls (1a, 1b, 1c, 1d) extending parallel to axis (O), and a polygonal cross-section perpendicular to axis (O), the shock absorbing member extending in the direction of axis (O) and absorbing externally-applied impact energy while buckling in the direction of axis (O). Shock absorbing member (1) is provided with at least two flanges (2a, 2b, 2c, 2d) protruding from at least two edges (1e, 1f, 1g, 1h) formed by at least two sets of neighboring walls among a plurality of walls, and the at least two flanges are arranged so that the directions of protrusion of the flanges from the edges are directed to the same direction with respect to a circumferential direction.

Abstract: A chassis (10) for a vehicle is disclosed which combines rigidity, speed of manufacture, and a small environmental footprint. Such a chassis comprises a framework of interconnected tubular sections (12, 14, 16, 18, 20, 22, 28) and at least one sheet (50) bonded to the framework. Laser cutting, CNC bending, and computer-controlled welding mean that the required production time can be kept to 120 seconds and the rigidity of the structure as a whole is sufficient. Such a chassis also has an exceptionally low carbon footprint. The sheet can be metallic, such as Aluminium or Aluminium honeycomb, or it can be a composite material such as one comprising a paper-based core and a fibre-reinforced plastics coating. The sheet can be non-flat, and is preferably a concave geometry such as a tub. It can be composed of a plurality of sections, ideally joined by a method allowing a positional tolerance so that any tolerance in the construction of the framework can be accommodated.

Abstract: A joint element made of fiber-reinforced plastic having at least three tubular and/or profile-shaped connection regions. The joint element has at least one V-shaped or U-shaped rigid wall element, which is arranged between two connection regions and is connected to the fiber-reinforced plastic.

Abstract: It is intended to provide a sound insulation structure for a vehicle, which is capable of adequately retaining an elongated line component, such as a wiring harness, a pipe or a cable, while suppressing deterioration in sound insulation performance by a sound insulator. In the sound insulation structure, a sound insulator is provided in a void space surrounded by: a front fender panel; a cowl side member disposed on a vehicle inward side with respect to the front fender panel to extend in a vehicle front-rear direction; and a mud guard disposed just below the front fender panel and the cowl side member to form a wheel housing. The sound insulator is formed using an elastically-deformable urethane foam. The sound insulator is formed with a slit capable of clamping a regenerative brake wiring harness laid to extend in the vehicle front-rear direction and pass through the void space.

Abstract: A pair of right-and-left roof rails, a roof panel provided between the roof rails, a roof reinforcement extending in a vehicle width direction below the roof panel, a center pillar, and a gusset joined to an end portion, in the vehicle width direction, of the roof reinforcement are provided. Further, a node-shaped plate member is provided inside the roof rail at a position which overlaps the roof reinforcement longitudinally and vertically. Accordingly, buckling of a portion of the roof reinforcement which is located in the vicinity of a roof side can be restrained.

Abstract: A rough-terrain traveling vehicle equipped with a front seat roll bar and a rear seat roll bar is adapted to allow use of only the front seat roll bar. The front seat roll bar includes a top middle cross pipe extending left and right in the vehicle width direction, and left and right middle side pipes extending to the top middle cross pipe. Left and right gussets are provided at left and right assembly points where the left and right middle side pipes and the top middle cross pipe each are connected. When attachment screws are inserted into the left and right gussets, the rear seat roll bar is joined to the front seat roll bar.

Abstract: A chassis for a vehicle is disclosed which combines rigidity, speed of manufacture, and a small environmental footprint. Such a chassis comprises a framework of Interconnected tubular sections (14, 18) and at least one composite sheet (50) bonded to the framework, at least part of the composite sheet being of unidirectional fibers. The sheet can be non-flat, and is preferably a concave geometry such as a tub. It can be composed of a plurality of sections (78, 80). The part of the composite sheet that Is of unidirectional fibers extends obliquely rearwardly from a tubular section on one side of the chassis toward a further tubular section on another side of the chassis, the fibers also being oriented obliquely rearwardly In the same sense. A further similar part extends in the opposite direction/symmetrically, overlapping as necessary.