Bogies TRIZ Cases

Segmented friction shoes with low friction pads decouple lateral displacement energy, preventing wheelset yaw and hunting instability.

Integrally cast supporting seat eliminates welding deformation to improve installation precision and motion reliability of railway bogie side frames.

Variable longitudinal stiffness in hydraulic bushings resolves the conflict between high-speed stability and curving dynamics.

An asymmetric axle box arrangement increases the inside rail wheelbase, improving curved line stability without complex steering linkages.

Elastomeric roller bearing adapter pads increase longitudinal, lateral, and rotational stiffness for railcar trucks.

A bogie lever arm with a rotatable friction body provides load-dependent damping for rail vehicle secondary suspensions.

A rail vehicle chassis uses a non-load-bearing control arrangement to passively adjust main wheel alignment relative to the rails.

A bogie frame positions secondary suspensions at longitudinal ends to minimize height and enable a fully lowered floor.

Compensating device vents high pressure air to environment through dedicated outlet, preventing car body tilting from unpredictable pneumatic line conditions.

A shelf-less bolster friction pocket design enables vertical wedge extraction without truck disassembly.

Segmented cast bolster structure with thickened walls and U transitions reduces stress concentrations to prevent fractures while lowering overall weight.

Articulated push rods route past central buffer springs via asymmetric head carrier mounting, resolving installation space constraints.

Integrating cast-in pads into the sideframe top compression member eliminates welded brackets, preventing structural failure and weight increase.

Laminated protective film adheres to railcar bogie plate springs, resolving collision protection and weight trade-offs while ensuring fire resistance.

Optimizing primary and secondary suspension stiffness ratios reduces axle box bearing wear while maintaining vehicle stability.

External ribs and undulating shapes reduce stress concentrations in bogie side frames, preventing premature failure.

Mounting traction batteries on the bogie lowers the center of gravity and resolves structural instability caused by high roof placement.