Portable Lifting TRIZ Cases

A rope hoist drum support uses asymmetric ribs and a distinct shaft axis to establish clear positioning references during assembly.

A capstan anti-reversing pawl mechanism uses a biased pawl and flexible coupling to transmit torque.

Segmented annular weights attach to the hook body to resolve the contradiction between high tensile load requirements and operator handling ease.

A damper pulley hub applies an abrasion prevention coating to reduce friction between the hub and oil seal.

Radial ribs segment the cavity to isolate thermal zones, minimizing shrinkage differences caused by fiber orientation and ensuring precise roundness.

Pivoting handle on lever hoist resolves left-right handed trade-off via spring-loaded joint.

A winch motor rotates a cable to raise and lower a lifting platform assembly using a biasing member that deflects the winch member.

Controlled carburization prevents proeutectoid cementite formation, resolving the trade-off between temper softening resistance and production efficiency.

Segmenting cables into a three-dimensional geometry reduces destabilizing moments and spin, simplifying crane operations.

A hoisting assembly uses an upper movable block to vary the equivalent spring coefficient of the rope system.

A securing strap integrates dual interfaces to maintain object tension without relying on a single ratcheting device.

Dynamic unwinding discs adjust position relative to the rope guide, preventing disengagement when the guide faces downwards.