Powered Handcart Start Mechanism for Manual-Electric Mode Switching
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Solution Overview
Problem
Existing handcarts require significant manual effort, especially when transporting heavy goods or under poor road conditions, and may become immovable or overturn, lacking efficient and safe operational modes.
Innovation Solution
A movable vehicle with a power supply unit, controller, and starting mechanism allowing both manual and electrical operation, featuring a clutch mechanism for mode switching, and a pivoting frame design for improved stability during unloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If manual operation is used to transport heavy goods, then the handcart can be operated without power supply, but great effort is required and the handcart may become immovable or overturn
Solution Approach 1:
The patent applies dynamics by making the frame portion pivotable between a transport position and a lifted position. This dynamic structural change allows the handcart to adapt to different operational states: stable for transport, and elevated for unloading. The pivotable connection enables the frame to rotate relative to the base, transforming the static structure into a dynamic one that responds to operational needs.
Solution Approach 2:
The patent changes the positional parameter of the frame portion by allowing it to pivot between different angles. In the transport position, the frame is at a lower angle for stability; in the lifted position, it rotates to an elevated angle for easy unloading. This parameter change (angular position) resolves the contradiction by providing both stability during transport and ease of unloading.
2Ease of operation
If electrical operation is added to reduce manual effort, then power and control systems are required, but device complexity increases
Solution Approach 1:
The patent applies multi-functionality by designing a controller that can operate the motor in different modes (forward, reverse, braking) and by creating a starting mechanism that serves both as a power activation switch and as part of the control system. The single starting mechanism performs multiple functions: activating power, controlling motor operation, and enabling mode switching between manual and electric operation.
Solution Approach 2:
The patent merges the power activation function and the control function into a single starting mechanism. Instead of having separate switches for power and control, the starting mechanism integrates both functions, reducing the number of components and simplifying the overall system while maintaining ease of operation.
3Productivity
If a starting mechanism is added to activate electrical operation, then quick electrical start is enabled, but the control mechanism becomes more complex
Solution Approach 1:
The patent applies preliminary action by positioning the starting mechanism in a default state where power is not activated, and the user must actively engage it to start operation. The locking portion is pre-configured to lock the starting unit in the initial position, preventing accidental activation. This preliminary setup enables quick startup when needed while maintaining safety through the locked default state.
Solution Approach 2:
The starting unit acts as an intermediary between the user and the power supply/controller system. It mediates the activation process by providing a physical interface (knob rotation) that triggers the electrical connection. This intermediary simplifies the user interaction while managing the complexity of the underlying electrical and control systems.
4Ease of operation
If the frame is made pivotable for unloading operation, then material unloading is facilitated, but stability during transport may be compromised
Solution Approach 1:
The patent applies dynamics by making the frame portion pivotable between a transport position and a lifted position. This dynamic structural change allows the handcart to adapt to different operational states: stable for transport, and elevated for unloading. The pivotable connection enables the frame to rotate relative to the base, transforming the static structure into a dynamic one that responds to operational needs.
Solution Approach 2:
The patent applies periodic action through the repeated cycling of the frame between two distinct positions: the transport position for stable movement and the lifted position for unloading. This periodic transformation allows the system to alternate between stability and accessibility as needed, with each cycle comprising a transition to and from the lifted position.
Data Source
AI summary
The present invention provides a movable vehicle. The movable vehicle comprises a carrying mechanism and a holding mechanism connected to the carrying mechanism, and the bottom of the carrying mechanism is provided with wheels, wherein the movable vehicle further comprises a starting mechanism arranged on the holding mechanism, the starting mechanism comprising a starting unit, a power supply unit, and a controller. The starting unit is configured to be switchable between an initial position and a start position. The controller is configured to be electrically connectable to the power supply unit, wherein when the starting unit is in the start position, the starting unit is coupled to the controller to activate the electrical connection between the controller and the power supply unit, and when the starting unit is in the initial position, the starting unit is decoupled from the controller. According to the above solution, a user can easily activate the electrical connection between the controller and the power supply unit simply by operating the starting unit on the holding mechanism, thereby allowing the controller to further perform various control operations.