Spring-Set Mechanical Brake for Self-Powered Treadmill Emergency Stop
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Self-powered treadmills face challenges in providing effective resistance and safety due to low internal friction, making it difficult to start and stop the machine, especially in emergency situations where power disconnection is required, as traditional emergency shutoff methods are not effective in halting the belt motion.
Innovation Solution
A mechanical braking system is introduced that can rapidly halt the motion of the belt or rollers in both self-powered and motor-powered modes by using a mechanical brake attached to the electric belt motor, which engages when electricity is removed, utilizing an electrically-released spring-set, pneumatic, or hydraulic brake to stop the belt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If self-powered treadmills use low internal friction structures to allow easy starting and movement, then the ease of operation is improved, but the ability to stop the machine quickly and provide effective resistance deteriorates
Solution Approach 1:
The patent applies preliminary anti-action by implementing a braking system that is pre-positioned and ready to engage opposite to the belt's motion. The brake mechanism is continuously prepared to counteract the low-friction movement, allowing the treadmill to start easily during normal operation but providing immediate resistance when emergency stopping is required. This resolves the contradiction by having the anti-action (braking force) ready in advance without interfering with normal low-friction operation.
Solution Approach 2:
The patent introduces a mechanical brake system as an intermediary component between the power source and the belt. This intermediary mechanism can be engaged or disengaged independently of the low-friction structures, allowing normal operation to continue with minimal resistance while providing a means to rapidly stop the belt when needed. The brake acts as a mediator that can override the low-friction design without permanently altering it.
2Device complexity
If traditional emergency shutoff methods are used in self-powered treadmills, then the device complexity is reduced, but the effectiveness of emergency stopping deteriorates
Solution Approach 1:
The patent extracts the braking function from the main power transmission system by implementing a separate, independent mechanical brake mechanism. Rather than relying on the motor's electromagnetic braking (which is ineffective when power is disconnected), the patent removes the dependency on electrical systems for emergency stopping and provides a dedicated mechanical braking system that operates independently. This maintains relative simplicity while dramatically improving emergency stopping effectiveness.
3Ease of manufacture
If self-powered treadmills rely on user weight and incline to provide resistance, then the ease of manufacture is improved, but the ability to independently control speed and resistance deteriorates
Solution Approach 1:
The patent applies dynamics by implementing a variable friction mechanism that can dynamically adjust the resistance level independently of the belt speed. The friction mechanism can be modulated to provide different resistance levels while the belt continues to move at various speeds, allowing independent control of these two parameters. This maintains the simplicity of the self-powered design while adding the versatility to independently control speed and resistance through the variable friction 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 mechanical braking system ensures safe and immediate stopping of the treadmill in emergency situations, preventing injury by maintaining the belt in a stopped position even after power disconnection, and allows for easier starting and mounting by locking the belt in place when power is off.
Implementation Method 1
electrically-released spring-set brake
Implementation Method 2
mechanical brake... to brake the continuous belt... rapid halting of motion
Data Source
AI summary
A mechanical braking system which can provide a brake to a self-powered treadmill, or a dual mode treadmill that can operate in both self-powered and motor-powered modes, that will rapidly halt the motion of the belt or rollers in the event of a power disconnect such as from the removal of a safety key.