Foldable Handcart Triangular Support Segmented Beams
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Solution Overview
Problem
Traditional foldable handcarts lack supporting stability and bearing capacity due to their design, which affects their usability and storage convenience.
Innovation Solution
A foldable handcart design featuring a triangular supporting structure formed by longitudinal beams and oblique beams, with a U-shaped groove mechanism and telescopic connecting frames, providing enhanced stability and capacity through a combination of pivoted and telescopic components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional foldable handcart designs are used, then the handcart can be folded for storage, but the supporting stability and bearing capacity are poor
Solution Approach 1:
The longitudinal beams are divided into front and rear parts that can pivot relative to each other around a longitudinal beam limiting part. This segmentation allows the beam to be folded for compact storage while forming a complete linear beam when unfolded, providing both foldability and structural stability.
Solution Approach 2:
The handcart employs dynamic structures including pivoted longitudinal beams, telescopic upright columns, and foldable cross beams that can transition between extended and retracted positions. These dynamic elements enable the handcart to adapt its configuration for both stable operation and compact storage.
2Ease of operation
If the handcart is designed to be foldable, then storage convenience is improved, but the bearing capacity decreases
Solution Approach 1:
The cross beam is segmented into first and second parts that can pivot relative to each other around a cross beam limiting part. When unfolded, these parts form a complete linear cross beam providing strong bearing capacity; when folded, they reduce the overall size for convenient storage.
Solution Approach 2:
The telescopic upright columns allow one column to be nested within another when retracted, significantly reducing the handcart's height and volume for storage while maintaining full structural integrity and bearing capacity when extended for use.
Data Source
AI summary
A foldable handcart comprises a handcart frame comprising a bottom frame, a front frame, a rear frame and side frames. The bottom frame comprises two longitudinal beams and a supporting beam arranged in-between. Each longitudinal beam has two ends separately pivoted to the front and rear frames and comprises a front longitudinal beam part and a rear longitudinal beam part, which are pivoted to two ends of a longitudinal beam limiting part and can be folded downwards or be limited upwards to form the linear longitudinal beam. Each side frame comprises two first oblique beams having first ends pivoted together and second ends separately pivoted to the front and rear frames. In the unfolded state, each front longitudinal beam part and the corresponding rear longitudinal beam part form one linear longitudinal beam and form a triangular supporting structure together with the two first oblique beams of the corresponding side frame.