Bogie-Underframe Connections TRIZ Cases

Optical boarding sensors detect rail vehicle height at the platform edge, enabling running-gear calibration without costly manual measurements.

Variable spring stiffness keeps the stabilizer soft in normal running and stiffer at high roll, balancing comfort, clearance, and derailment safety.

Two railway air springs share one compressed-air reservoir, reducing tank duplication, system mass, and installation space.

Integrating the spring unit with the driver device eliminates the transverse traverse, reducing installation space and weight.

Wedge elements fill air spaces in the side bearer assembly to maintain consistent longitudinal friction damping during angular motion.

Segmented wear liner uses elastic expansion and protrusions to engage center bowl recesses, eliminating time-consuming welding during replacement.

A railway anti-rolling device uses a torsion bar with dual elastic bodies to adjust stiffness based on displacement.

A single actuator integrates yaw damping, transverse damping, and active steering to reduce wear while maintaining smooth operation.

Decoupling mechanism isolates wagon body rolling movement from emergency spring vertical support, reducing derailment risk caused by high rolling stiffness.

Segmenting secondary suspension valves across two computers maintains air gap height when a computer fails.

Hydraulic cylinders replace torsion bars to reduce chassis strain and improve ride comfort.

A rail vehicle chassis connection uses a peg-shaped console engaging a receiving device to limit wagon body movement.

Elastomeric wear liners fill radial clearance to eliminate impact, maintaining freight car stability during high-speed travel.

A conical mandrel and bushing create a positive connection between the car body and secondary spring.

Bearing race rollers apply opposing forces to maintain truck square configuration, reducing warping and hunting instability.

Coordinated roll compensation devices resist crosswind-induced torsion, maintaining ride comfort and stability.

Segmenting load bearing into a high stiffness passive element allows downsizing the active actuator, reducing cooling needs while maintaining ride comfort.

Bogie-mounted air spring valve tracks vertical suspension through mechanical linkage, preventing rolling and pitching from triggering false height adjustments.

A rail vehicle torsion bar uses an intermediate element to modify bending vibrational modes and provide damping.

A pneumatic tilting system uses a seismic mass to dynamically adjust spring flow, resolving slow response times in conventional leveling valves.

Integrating spring and pendulum functions reduces component count while improving lateral softness for low-floor wagons.

Separate molding of inner and outer rubber stopper bodies eliminates jacket molds and reduces production time while stabilizing heat transfer uniformity.

A railcar restricting member attaches to a center pin via a temporary fastening portion, reducing operator burden during maintenance.

Adjustable air springs in rail bogies use displaceable connection parts to vary transverse stiffness via elastic deformation.

Supply device keeps actuator piston distance constant, eliminating frequent height adjustments for platform alignment.

Adjustable air spring rigidity reduces wheel load variation at low speeds while maintaining high roll stability for safe high-speed curve navigation.

A rail vehicle spring device uses a contact point curve to convert transverse movement into vertical deflection for adjustable lateral stiffness.

A rail vehicle roll stabiliser arranges push-pull rods to intersect at the chassis rotation axis.

Offset elastic suspension members convert vertical body motion into transverse displacement, lowering door thresholds while maintaining bogie stability.

Segmented sub-frame casting reduces unsprung weight and manufacturing costs while maintaining structural rigidity.

An articulated rod linkage maintains a reduced cylinder angle with the longitudinal direction, preventing gauge infringement during yaw movements.

Integrated hydraulic actuators within primary helical compression springs tilt the rail vehicle frame to reduce lateral acceleration and passenger discomfort.

Air spring sensor system detects load conditions using magnetic field changes between rim and top plate.

Frustoconical axes with inclined rolling tracks enable transverse pendulation in railway bogies.

A pivot pin with a horizontal through-hole supports a bolt-shaped limit stop to secure the running gear during lifting operations.

A longitudinal draw rod system transfers forces between bogie frames and bolsters using cross-pin joints with embedded friction bearings.

Arched spring segments on a hydraulic cylinder arrangement reduce mechanical complexity and bearing jamming risks in rail vehicle suspension systems.

Adjustable wedge sub-devices compensate for wheel wear and spring deflection, enabling higher load surface heights within strict loading gauge limits.

Electromagnets in the air spring top plate adjust lateral stiffness dynamically, overcoming fixed stiffness limitations in rail vehicle suspensions.

A longitudinal traction device transfers force between the frame and bolster.

A rail vehicle connecting element uses a channel-shaped recess to route cables directly through the structure, preserving car body integrity.