Utility Handcart Foldable Struts Uphill Assist Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing utility carts are difficult to navigate over rough terrain and lack the broad functionalities needed for various activities, including outdoor recreation, heavy-duty hauling, and operations in remote areas.
Innovation Solution
The utility handcart includes an uphill assist mechanism that selectively engages wheel axles to prevent backward rotation, adjustable wheel struts that can be folded for compact storage, and a handle assembly that can be adjusted for different angles and positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the handcart is designed with fixed wheel struts for stability, then navigation on rough terrain is improved, but storage and transport become difficult due to large footprint
Solution Approach 1:
The wheel struts are designed to be adjustable between extended and retracted positions. When extended, they provide stability for navigating rough terrain. When retracted, they minimize the storage footprint. This dynamic adjustability resolves the contradiction between stability during use and compactness during storage.
2Device complexity
If the handle assembly is fixed for structural simplicity, then device complexity is reduced, but adaptability to different user needs and terrain conditions deteriorates
Solution Approach 1:
The handle assembly incorporates adjustable mechanisms that allow it to be positioned at multiple angles and heights. This dynamic adjustability enables adaptation to different user preferences and terrain conditions while maintaining reasonable structural simplicity through standardized adjustment mechanisms.
3Reliability
If uphill assist mechanism is always engaged for preventing backward wheel rotation, then reliability on inclines is improved, but ease of operation on flat terrain deteriorates due to restricted wheel rotation
Solution Approach 1:
The uphill assist mechanism is designed to be selectively engageable rather than permanently fixed. Users can engage it when navigating inclines to prevent backward wheel rotation, and disengage it on flat terrain to allow free wheel rotation in both directions. This dynamic engagement resolves the contradiction between reliability on inclines and ease of operation on flat surfaces.
Data Source
AI summary
A utility handcart can include foldable struts to reduce an overall volumetric footprint of the handcart. The struts can be selectively rotated with a pin to fix the struts in either a stowed position or a downward position for supporting wheels during use. The utility handcart can also include an uphill assist mechanism securing the wheels to the struts or engaged with the wheel axles to prevent the wheels from rotating in one direction, for example backward, when parked or pulled up a hill. The uphill assist mechanism can be selectively engaged to either allow for rotation of the wheels in both directions or prevent the backward rotation of the wheels as desired by the user.