Steering Rod Axial Displacement Inhibition via Motor Torque

The patent extracts and eliminates the step-down gear-train from the steering mechanism, retaining only the essential components. The movement thread is designed to provide the necessary self-inhibition without requiring additional gear reduction stages, thereby simplifying the overall device structure while maintaining the reliability of preventing retro-driving.

The patent replaces the mechanical step-down gear-train system with a optimized movement thread design. Instead of using complex mechanical gear reduction to achieve self-inhibition, the solution substitutes a carefully designed thread geometry that provides the necessary mechanical advantage and self-locking properties directly, reducing device complexity.

The patent removes the separate blocking element from the steering mechanism and integrates the stabilization function directly into the movement thread design. The thread geometry itself provides the blocking effect through its self-inhibiting properties, eliminating the need for additional blocking components and simplifying the device structure.

The patent merges the functions of the movement thread and the blocking element into a single integrated component. The movement thread is designed to simultaneously provide both the steering actuation function and the axial displacement prevention function, thereby reducing device complexity and component count.

The patent optimizes the geometric parameters of the movement thread, specifically the thread angle and pitch, to achieve an optimal balance between efficiency and self-inhibition. By carefully selecting these parameters, the thread provides low power requirements while maintaining sufficient mechanical advantage to prevent retro-driving, resolving the contradiction between efficiency and inhibition.

The patent applies different local characteristics to different parts of the movement thread. The thread geometry is designed with varying properties along its length or in different zones to provide high efficiency in the drive direction while maintaining strong self-inhibition in the retro-drive direction, allowing simultaneous optimization of both conflicting requirements.

The patent extracts and removes unnecessary additional components from the steering mechanism, retaining only the essential elements needed for fault prevention. By eliminating redundant components while maintaining the core safety functions, the design achieves reliable fault prevention with reduced weight.

The patent designs components to serve multiple functions simultaneously. The movement thread, for example, provides both the primary steering actuation function and the secondary safety function of preventing retro-driving and axial displacement. This multi-functionality eliminates the need for separate dedicated safety components, thereby reducing overall system weight while maintaining reliability.