Hand Truck Hinge Assembly for Synchronized Load Assist
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Solution Overview
Problem
Existing load transporters lack stability and efficiency during transitions between upright and laid-back orientations, leading to potential instability and difficulty in lifting and transporting loads.
Innovation Solution
A load transporter with a wheel unit and load support that includes a hinge assembly with left and right hinge units connected by a brace, featuring wheel and support brackets that pivot about a load-assist axis, providing stability and unified motion during orientation changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a traditional hinge connection is used between load support and wheel unit, then the structure is simple, but the load transporter experiences instability and unsynchronized movement during transitions between orientations
Solution Approach 1:
The patent merges the left and right hinge units into a unified hinge assembly structure with a common load-assist axis, ensuring synchronized movement. The hinge assembly integrates multiple components (wheel brackets, support brackets, connecting elements) into a single coordinated system that prevents unsynchronized movement during orientation transitions, directly resolving the stability issue while maintaining reasonable structural complexity.
2Ease of operation
If the load transporter allows free movement between orientations, then the ease of operation is improved, but the control and precision of movement is reduced
Solution Approach 1:
The patent implements a dynamic hinge assembly that enables controlled movement between upright and laid-back orientations. The mechanism allows smooth transitions through defined movement paths while maintaining precision through the geometric constraints of the hinge structure, including the load-assist axis and bracket connections, achieving both ease of operation and movement precision.
3Reliability
If the hinge assembly reinforces connection to block shifting, then the stability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the hinge connection into distinct functional components (wheel brackets, support brackets, connecting elements) that work together to provide stable connections. This segmentation allows each component to be optimized for its specific function while collectively achieving reliable connection stability, balancing the need for reinforcement with manageable device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances stability and ease of load lifting by preventing unsynchronized movement of hinge units, allowing smooth transitions and reducing user effort in transporting objects.
Implementation Method 1
The hinge assembly supports the load support for movement relative to the wheel unit about a load-assist axis from the upright orientation to a first-stage, laid-back orientation, where a front end of the load is lifted away from the surface
Implementation Method 2
The hinge assembly supports the load support and the wheel unit for movement about an axle of the wheel unit to lift the load support off the surface
Implementation Method 3
The wheel unit is configured to allow the load transporter to roll across a surface
Data Source
AI summary
A load transporter includes a wheel unit, a load support, and a hinge assembly comprising a left hinge unit, a right hinge unit, and a brace extending between and the left and right hinge units. The left hinge unit and the right hinge unit each include a wheel bracket coupled to the wheel unit and a support bracket coupled to the load support. Each wheel bracket is coupled to the respective support bracket for pivotable movement about a load-assist axis from an upright orientation, to a first-stage, laid back orientation, and for pivotable movement about a wheel axis defined by an axle of the wheel unit and spaced apart from the load-assist axis from the first-stage, laid-back orientation to a second-stage, laid-back orientation.