Magnetic Brake Assembly for Smooth Rollator Speed Control
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Solution Overview
Problem
Assistive walking devices like rollators with wheels provide poor safety and uncontrollable support and speed, leading to potential falls and emergency stop hazards during braking.
Innovation Solution
A brake apparatus featuring a shaft body, a rotatable housing with a magnetic induction mechanism that generates resisting force through a magnetic field reaction, and an adjustment mechanism to control the braking force, eliminating emergency stops and reducing wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional friction-based brake apparatus is used, then braking function is provided, but emergency stop effect occurs causing safety hazards and high wear
Solution Approach 1:
The patent replaces the traditional mechanical friction-based braking system with an electromagnetic braking system. The electromagnetic brake uses magnetic field interaction between a stator and rotor to generate braking torque, eliminating the need for friction-based mechanical contact. This substitution resolves the contradiction by providing smooth, controllable braking without emergency stops and significantly reducing wear on braking components.
Solution Approach 2:
The patent employs adjustable electromagnetic parameters (current, voltage, magnetic field strength) to control the braking force. By changing these parameters, the braking intensity can be precisely regulated to match user needs, avoiding sudden emergency stops while maintaining effective braking control. This parameter adjustment capability resolves the safety contradiction by enabling smooth, predictable braking behavior.
2Ease of operation
If wheels are added to increase flexibility, then mobility is improved, but support force and speed become uncontrollable leading to safety issues
Solution Approach 1:
The patent incorporates a control system that provides feedback on the rollator's operational state, including speed and support force. This feedback mechanism allows the system to automatically adjust the electromagnetic braking force to maintain safe and controlled operation, resolving the contradiction between mobility flexibility and support force control by enabling real-time monitoring and adjustment.
Solution Approach 2:
The electromagnetic braking system automatically regulates its own braking force based on operational conditions without requiring constant manual intervention. The system self-adjusts to maintain optimal support force and speed control, enabling flexible mobility while ensuring safety through automated control mechanisms.
3Ease of operation
If manual braking operation is required, then braking function is achieved, but operation requirements increase and emergency stop remains dangerous
Solution Approach 1:
The patent replaces manual mechanical braking operation with an electromechanically controlled braking system. The electromagnetic brake responds to electrical control signals rather than manual mechanical input, providing smoother and more predictable braking action. This substitution improves ease of operation by eliminating complex manual mechanisms while enhancing safety by preventing dangerous emergency stops through controlled electromagnetic engagement.
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
The solution provides safer and more controlled braking, reducing wear and improving the service life of the brake apparatus while allowing for adjustable braking force, enhancing user safety and convenience.
Implementation Method 1
a magnetic induction mechanism, arranged in the housing to generate resisting force opposite to a rotation direction of the housing to the housing or generate resisting force opposite to a rotation direction of the shaft body to the shaft body by a magnetic field reaction when the housing rotating relative to the shaft body
Data Source
AI summary
Disclosed are a brake apparatus, a wheel body assembly, and a rollator. The brake apparatus comprises a shaft body, a housing, a magnetic induction mechanism and an adjustment mechanism. The housing rotates relative to the shaft body; the magnetic induction mechanism is arranged in the housing to generate resisting force opposite to a rotation direction of the housing or the shaft body to the housing or the shaft body by a magnetic field reaction when the housing rotating relative to the shaft body. The adjustment mechanism is connected to the magnetic induction mechanism for adjusting a magnitude of the resisting force. The magnetic induction mechanism is capable of playing a braking role on the wheel body integrated or connected with the brake apparatus, because its braking force is related to the rotation of the housing or shaft body, rather than friction braking, it will not produce an emergency stop effect.