Underframes TRIZ Cases

Parallel webs and flat support areas create a force path for friction stir welding, reducing distortion and post-weld processing.

Integrated guiding elements inside the levelling piston create end stops that save space and simplify rail vehicle assembly and maintenance.

An integrated piston guide in a grooved levelling cylinder constrains rail vehicle motion, saves space, and resists shear forces.

Composite floor beams with an insulating core cut boxcar floor weight and cost while limiting thermal expansion stress, deflection, and buckling.

A multi-cavity aluminum side beam creates mounting space for large under-vehicle equipment in narrow rail vehicle bodies while reducing welding stress.

Integrated chambers and recesses in light metal underframe profiles secure anti-lift devices while cutting bracket welding, labor, and damage risk.

Laser welding joins floor-frame plates and beams with lower heat input, enabling thinner rail vehicle underframes with high rigidity and load capacity.

An air tank placed in a car body recess above the pneumatic spring saves chassis space, improves gas flow, and lowers leak risk.

External support arms and load-bearing frame or trough side walls free internal width in rail vehicle housings while preserving mounting strength.

Extruded shaped members with local notches preserve bolster rigidity while creating underframe space for pipes and ducts and reducing weight and cost.

A compression-rigid frame and tensile element divide force transmission to raise rail-vehicle capacity while reducing weight.

This case shows how underframe coating, covers, and closing plates improve fire resistance while preserving underfloor equipment space.

Modular panels replace complex painting processes, reducing production time while maintaining structural integrity and weight efficiency.

Replacing metal wagons with a segmented composite beam lowers structure mass without increasing manufacturing complexity through local quality optimization.

A self-propelled platform uses integrated wheel guides to engage adjacent vehicle rails for seamless traversal.

A hybrid railcar frame uses a square center beam and crash posts to merge freight strength with passenger comfort.

A pneumatic spring arrangement relocates the pressure vessel to the low-floor section, bridging the gap to the bogie connection via a connecting line.

Diagonal brace members interconnect the top chord and center sill, reducing longitudinal overhang and derailment risk without adding weight.

Longitudinal welds in the transition portion distribute forces along the railcar axis, reducing fatigue failures at the joint.

Segmented coupling with lateral and longitudinal play reduces component stress while maintaining accurate vertical force application.

Stiffening ribs guide force flow from wheelset bushings into transverse beams to increase shear and transverse rigidity in rail vehicle chassis frames.

A rail vehicle underframe end structure uses oblique and coupler support beams to form quadrilateral frames for robust load bearing.

Removing side sills via monolithic floor panels reduces gondola car weight while maintaining structural strength.

Segmented fastening keeps the rear cover fixed on the axle box while removing fixing flanges, reducing disassembly time and preventing component damage.

Inclined web structure in railway vehicle chassis enables lateral flange shifting to accommodate bogie rotation.

A metal core bolster wrapped in carbon-fiber reinforced plastic layers provides high tensile strength and structural rigidity.

Single-piece longitudinal beam with integrated headpieces eliminates weld seams, resolving structural weakness while reducing weight by up to 25 percent.

Trundle carrier assemblies allow truck wheels to shift laterally and vertically, accommodating track elevation changes while spanning dual rails.

Crossed resilient connecting rods reinforce bogie side frames, increasing warp-resistant rigidity and stability on curved tracks.

Segmented radial and circular ribs reduce stress concentration in the pillow beam while maintaining rigidity.

Laser-MAG hybrid welding joins stainless steel box beams via plug heads, resolving deformation from low thermal conductivity.

Stainless steel underfloor cover with spaced plates creates an air layer to block radiation heat.

Flexible sheet metal sealing profile accommodates relative movement between spaced rail vehicle housing modules.

Pivotable bogey sections allow direct transverse displacement of end wheel sets, reducing acute striking angles and associated wear.

Replacing donor railcar center sills with modular designs expands car type variety while maintaining structural integrity.

Recessed underbody walls accommodate bogie steering angles, maximizing aisle width without costly structural modifications.

Transition plate widens gradually from narrow central section to draft arm flanges, eliminating sharp corners that cause stress concentrations.

Segmenting the holder and using an intermediary reduces welding heat and inspection time while maintaining connection strength.

Inner ridge portions in the rectangular tube center beam prevent buckling under compressive loads while preserving underfloor equipment installation space.

An obtuse L-shaped solebar extends downward and upward to clear railway vehicle loading gauges.

Adjustable fluid pressure in rubber bag assemblies delivers nonlinear stiffness to isolate high-frequency vibrations and prevent fatigue damage.

Longitudinally offset rods nest resilient members between them, reducing vertical height while maintaining load support capability.

Oblique strut arrays and cross-beams resist compressive loads to prevent top chord buckling in railroad well cars.

Segmented spring pockets with chamfered guides retain load springs in predetermined positions, preventing tangling and misalignment caused by track variations.

Segmented rectangular flanges and spacers weld together, eliminating cutting waste and reducing bogie weight by 100 kg.

A truck suspension system uses non-linear and linear spring rates to dynamically shift weight between axles.

A mounting frame with vertical plates connects the center pin to the sleeper beam web structure.

Mounting the flashing rear end device on the railcar truck enables direct track power acquisition, resolving portability constraints.

Integrating fuel containment with structural supports reduces weight while maintaining crash safety and storage volume.

A railway coupling adapter uses clamping devices and feather keys to secure the unit to a car body without welding.

Dynamic jack configuration eliminates transverse forces during motion, preventing premature wear while maintaining optimal vertical damping.

An internal reinforcing plate overlaps cutouts in the legs of a U-shaped side stake to improve bending properties without exceeding AAR clearance limits.