Direct-Drive Motorized Handle for Load Movers
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Solution Overview
Problem
Existing motorized carts and suitcases with complex transmission systems and external DC motors are cumbersome, noisy, unsafe, and require frequent maintenance, while wireless and semi-autonomous systems are prone to malfunctions and costly repairs, posing challenges for users of all ages.
Innovation Solution
A hand-driven load mover with a handle featuring a built-in actuator, control unit, and motorized wheels that eliminate the need for belts and gears, allowing for easy operation with a push-button or touch-sensitive interface, suitable for both children and the elderly, and equipped with a rechargeable battery and USB charging capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If transmission engines with belts and gears are used, then motorized function is achieved, but maintenance complexity increases and reliability decreases
Solution Approach 1:
The patent removes the transmission system (belts and gears) from the motorized cart, extracting the problematic components that required maintenance. The motor is directly coupled to the wheel, eliminating the need for belts and gears that would otherwise need oiling and replacement.
Solution Approach 2:
The patent replaces the mechanical transmission system (belts and gears) with a direct-drive motor system. This substitution eliminates the mechanical complexity and associated maintenance requirements while preserving the motorized propulsion function.
2Power
If external DC motors are used, then motorized propulsion is achieved, but safety decreases due to overheating and explosion risks
Solution Approach 1:
The patent merges the motor with the wheel structure, creating an integrated unit. This integration allows for better thermal management and eliminates the separate external motor housing that could overheat and explode. The motor becomes part of the wheel assembly, improving safety.
3Extent of automation
If complex wireless control systems with motion sensors and joysticks are used, then autonomous movement is achieved, but device complexity increases and reliability decreases
Solution Approach 1:
Instead of using complex wireless control systems with motion sensors and joysticks, the patent inverts the approach by using simple tactile buttons on the handle for direct control. This simplification reduces device complexity while maintaining usability, eliminating the need for complex sensors and wireless communication systems.
4Ease of operation
If touch sensors are used for control, then user interface is simplified, but reliability decreases as sensors break quickly
Solution Approach 1:
The patent uses simple tactile buttons instead of fragile touch sensors. These buttons are more durable and can be easily replaced if needed, providing a reliable control interface that doesn't break quickly like touch sensors do.
Data Source
AI summary
A handle for a hand-driven load mover, including: an actuator; a control unit; a power source; wherein the control unit is adapted to be in communication with a controller, battery pack and motor operationally coupled to, or embedded in, a wheel of the load mover.