Mudguard Rotational Coupling with Parallel Springs

The elastic return function is segmented into multiple parallel springs (first elastic return spring and second elastic return spring) rather than using a single oversized spring. This segmentation provides the required elastic force while maintaining compact dimensions and reducing complexity compared to a single large spring.

The solution transitions from using a single spring in one dimension to using multiple springs arranged in parallel across different spatial dimensions. The first and second elastic return springs are positioned at different locations and orientations, distributing the elastic force requirement across multiple elements rather than concentrating it in one oversized component.

The complex inclined plane and cam mechanisms are completely removed from the design. The patent extracts only the essential rotational coupling function, achieving mudguard rotation through a simpler pin-and-slot mechanism with parallel springs, eliminating unnecessary complexity while maintaining the required adaptability.

Instead of using complex inclined planes or cams to achieve rototranslation, the invention inverts the approach by using a simple rotational pin mechanism combined with parallel elastic springs. The rotation is achieved directly through the pin rotating within the slot, without requiring the intermediate complex mechanisms of inclined planes or cams.

The solution changes the spatial arrangement from vertical stacking (increasing height) to horizontal distribution. The parallel springs are arranged side-by-side in the horizontal plane rather than stacked vertically, achieving the required rotation functionality while minimizing vertical dimensions.

The rotational mechanism is segmented into discrete components (pin, slot, parallel springs) that can be compactly arranged. This segmentation allows the mechanism to achieve rotation beyond limit angles through the pin traveling along the slot arc, without requiring the vertical bulk of inclined plane mechanisms.

Complex mechanisms such as inclined planes, cams, and multiple coupling surfaces are completely removed. The patent extracts only the essential rotational function, implementing it through a simple pin rotating within a slot with parallel springs, thereby eliminating the numerous surfaces and components that could jam in dirty environments.

The invention focuses quality and simplicity at the critical rotational interface. The pin-and-slot mechanism with parallel springs creates a localized, simple rotational path with minimal contact surfaces, reducing the probability of jamming at the most critical location while maintaining the required rotation functionality.