Trailer Trolley Asymmetric Converging Arm Transmission

The patent applies asymmetry by changing from a regular parallelogram transmission with equal parallel arms to an asymmetric transmission where the arms have different lengths and are not parallel. Specifically, the first arm is longer than the second arm, and they converge at an angle rather than remaining parallel. This asymmetric configuration increases the torque generation capability and load-resisting action while maintaining structural simplicity.

The patent resolves this contradiction by transitioning from a parallel arm configuration to a converging arm configuration that operates in a different geometric dimension. The arms converge at an angle, creating a triangular arrangement rather than a rectangular one. This dimensional change allows the arms to be positioned more effectively in space, generating increased torque without requiring excessive longitudinal clearance, as the converging geometry utilizes vertical and lateral spacing more efficiently.

The patent applies preliminary anti-action by introducing a damping mechanism that pre-empts and counteracts the oscillatory movements of the axle before they can cause wheel skidding. The damper is positioned to resist axial oscillations of the axle about the hinge axis, applying a counteracting force that prevents the excessive movement that would lead to skidding. This preliminary resistance maintains reliable wheel contact with the ground while still allowing necessary suspension movement.