Mechanical Brake for High-Incline Treadmill Freewheeling
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Solution Overview
Problem
High-incline exercise machines, such as treadmills, face instability and safety issues due to the increased gravitational force acting on users, which traditional braking systems fail to adequately address, particularly at higher inclines where the user's mass is not fully engaged with the belt, leading to freewheeling and potential injury risks.
Innovation Solution
A mechanical braking system is introduced that includes a mechanical brake operatively attached to the electric belt motor, flywheel, or motor axle, which engages to prevent freewheeling by maintaining friction even after power disconnection, using an electrically-released spring-set brake or other types like pneumatic or hydraulic brakes, and is activated by sensors to detect incline and belt speed thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional motor braking systems are used in high-incline treadmills, then the system is simple and cost-effective, but the braking reliability deteriorates at high inclines due to freewheeling
Solution Approach 1:
The patent combines a mechanical brake system with the existing electric motor braking system. The mechanical brake includes a brake disc coupled to the motor shaft and brake pads that engage the disc, creating a dual-braking system that merges mechanical and electrical braking mechanisms to eliminate freewheeling at high inclines
Solution Approach 2:
The mechanical brake acts as an intermediary component between the motor and the belt system. It provides an additional friction-based braking mechanism that independently prevents freewheeling, serving as a mediator to enhance overall braking reliability without replacing the existing motor control system
2Productivity
If the incline is increased to provide high-incline exercise, then the exercise strenuousness is improved, but the stability and safety deteriorate due to gravitational effects
Solution Approach 1:
The mechanical brake system is designed to preemptively counteract the freewheeling effect that occurs at high inclines. By providing continuous mechanical friction braking in addition to motor braking, the system prevents the instability and safety issues that would otherwise occur during high-incline operation
3Reliability
If the mechanical brake is always engaged to prevent freewheeling, then the braking reliability is improved, but the energy consumption increases due to constant friction
Solution Approach 1:
The mechanical brake system is designed to be dynamically controllable rather than constantly engaged. The brake can be activated or deactivated based on operational conditions such as incline level and motor state, allowing the system to maintain reliability when needed while minimizing energy consumption during normal operation
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 mechanical braking system effectively stops and holds the belt in place, reducing the risk of injury by preventing freewheeling, even at high inclines, and ensures user safety by maintaining engagement until power is restored, addressing the limitations of traditional motor braking systems.
Implementation Method 1
A mechanical braking system is introduced that includes a mechanical brake operatively attached to the electric belt motor, flywheel, or motor axle, which engages to prevent freewheeling by maintaining friction even after power disconnection
Implementation Method 2
using an electrically-released spring-set brake or other types like pneumatic or hydraulic brakes
Data Source
AI summary
A mechanical braking system for a high-incline treadmill utilizing a mechanical brake which may be used on its own or in combination with a traditional motor brake. The mechanical brake is generally mountable on a treadmill between or around the belt motor and the flywheel. Upon engagement of the brake, typically the brake engages the flywheel, the motor, or the axle in a way that effectively locks the axle, and thus the belt, in a fixed position.